mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
8bc4accc37
Signed-off-by: Anton Khirnov <anton@khirnov.net>
3327 lines
106 KiB
C
3327 lines
106 KiB
C
/*
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* various utility functions for use within Libav
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#undef NDEBUG
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#include <assert.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include "config.h"
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/dict.h"
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#include "libavutil/internal.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/time.h"
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#include "libavcodec/bytestream.h"
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#include "libavcodec/internal.h"
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#include "audiointerleave.h"
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#include "avformat.h"
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#include "id3v2.h"
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#include "internal.h"
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#include "metadata.h"
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#if CONFIG_NETWORK
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#include "network.h"
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#endif
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#include "riff.h"
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#include "url.h"
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/**
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* @file
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* various utility functions for use within Libav
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*/
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unsigned avformat_version(void)
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{
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return LIBAVFORMAT_VERSION_INT;
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}
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const char *avformat_configuration(void)
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{
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return LIBAV_CONFIGURATION;
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}
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const char *avformat_license(void)
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{
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#define LICENSE_PREFIX "libavformat license: "
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return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
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}
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/* an arbitrarily chosen "sane" max packet size -- 50M */
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#define SANE_CHUNK_SIZE (50000000)
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/* Read the data in sane-sized chunks and append to pkt.
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* Return the number of bytes read or an error. */
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static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
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{
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int64_t chunk_size = size;
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int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos
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int orig_size = pkt->size;
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int ret = 0;
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do {
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int prev_size = pkt->size;
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int read_size;
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/* When the caller requests a lot of data, limit it to the amount
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* left in file or SANE_CHUNK_SIZE when it is not known. */
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if (size > SANE_CHUNK_SIZE) {
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int64_t filesize = avio_size(s) - avio_tell(s);
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chunk_size = FFMAX(filesize, SANE_CHUNK_SIZE);
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}
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read_size = FFMIN(size, chunk_size);
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ret = av_grow_packet(pkt, read_size);
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if (ret < 0)
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break;
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ret = avio_read(s, pkt->data + prev_size, read_size);
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if (ret != read_size) {
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av_shrink_packet(pkt, prev_size + FFMAX(ret, 0));
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break;
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}
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size -= read_size;
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} while (size > 0);
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pkt->pos = orig_pos;
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if (!pkt->size)
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av_packet_unref(pkt);
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return pkt->size > orig_size ? pkt->size - orig_size : ret;
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}
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int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
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{
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av_init_packet(pkt);
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pkt->data = NULL;
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pkt->size = 0;
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pkt->pos = avio_tell(s);
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return append_packet_chunked(s, pkt, size);
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}
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int av_append_packet(AVIOContext *s, AVPacket *pkt, int size)
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{
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if (!pkt->size)
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return av_get_packet(s, pkt, size);
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return append_packet_chunked(s, pkt, size);
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}
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int av_filename_number_test(const char *filename)
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{
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char buf[1024];
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return filename &&
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(av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
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}
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static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
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AVProbeData *pd, int score)
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{
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static const struct {
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const char *name;
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enum AVCodecID id;
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enum AVMediaType type;
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} fmt_id_type[] = {
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{ "aac", AV_CODEC_ID_AAC, AVMEDIA_TYPE_AUDIO },
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{ "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO },
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{ "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO },
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{ "eac3", AV_CODEC_ID_EAC3, AVMEDIA_TYPE_AUDIO },
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{ "h264", AV_CODEC_ID_H264, AVMEDIA_TYPE_VIDEO },
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{ "latm", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO },
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{ "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO },
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{ "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO },
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{ "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO },
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{ 0 }
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};
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AVInputFormat *fmt = av_probe_input_format2(pd, 1, &score);
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if (fmt) {
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int i;
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av_log(s, AV_LOG_DEBUG,
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"Probe with size=%d, packets=%d detected %s with score=%d\n",
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pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets,
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fmt->name, score);
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for (i = 0; fmt_id_type[i].name; i++) {
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if (!strcmp(fmt->name, fmt_id_type[i].name)) {
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st->codecpar->codec_id = fmt_id_type[i].id;
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st->codecpar->codec_type = fmt_id_type[i].type;
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#if FF_API_LAVF_AVCTX
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FF_DISABLE_DEPRECATION_WARNINGS
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st->codec->codec_type = st->codecpar->codec_type;
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st->codec->codec_id = st->codecpar->codec_id;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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break;
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}
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}
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}
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return !!fmt;
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}
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/************************************************************/
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/* input media file */
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/* Open input file and probe the format if necessary. */
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static int init_input(AVFormatContext *s, const char *filename,
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AVDictionary **options)
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{
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int ret;
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AVProbeData pd = { filename, NULL, 0 };
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if (s->pb) {
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s->flags |= AVFMT_FLAG_CUSTOM_IO;
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if (!s->iformat)
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return av_probe_input_buffer(s->pb, &s->iformat, filename,
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s, 0, s->probesize);
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else if (s->iformat->flags & AVFMT_NOFILE)
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return AVERROR(EINVAL);
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return 0;
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}
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if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
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(!s->iformat && (s->iformat = av_probe_input_format(&pd, 0))))
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return 0;
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ret = s->io_open(s, &s->pb, filename, AVIO_FLAG_READ, options);
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if (ret < 0)
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return ret;
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if (s->iformat)
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return 0;
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return av_probe_input_buffer(s->pb, &s->iformat, filename,
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s, 0, s->probesize);
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}
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static int add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
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AVPacketList **plast_pktl, int ref)
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{
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AVPacketList *pktl = av_mallocz(sizeof(AVPacketList));
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int ret;
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if (!pktl)
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return AVERROR(ENOMEM);
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if (ref) {
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if ((ret = av_packet_ref(&pktl->pkt, pkt)) < 0) {
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av_free(pktl);
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return ret;
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}
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} else {
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pktl->pkt = *pkt;
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}
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if (*packet_buffer)
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(*plast_pktl)->next = pktl;
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else
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*packet_buffer = pktl;
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/* Add the packet in the buffered packet list. */
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*plast_pktl = pktl;
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return 0;
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}
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static int queue_attached_pictures(AVFormatContext *s)
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{
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int i, ret;
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for (i = 0; i < s->nb_streams; i++)
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if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
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s->streams[i]->discard < AVDISCARD_ALL) {
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ret = add_to_pktbuf(&s->internal->raw_packet_buffer,
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&s->streams[i]->attached_pic,
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&s->internal->raw_packet_buffer_end, 1);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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#if FF_API_LAVF_AVCTX
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FF_DISABLE_DEPRECATION_WARNINGS
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static int update_stream_avctx(AVFormatContext *s)
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{
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int i, ret;
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for (i = 0; i < s->nb_streams; i++) {
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AVStream *st = s->streams[i];
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if (!st->internal->need_codec_update)
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continue;
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ret = avcodec_parameters_to_context(st->codec, st->codecpar);
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if (ret < 0)
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return ret;
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st->internal->need_codec_update = 0;
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}
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return 0;
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}
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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int avformat_open_input(AVFormatContext **ps, const char *filename,
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AVInputFormat *fmt, AVDictionary **options)
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{
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AVFormatContext *s = *ps;
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int i, ret = 0;
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AVDictionary *tmp = NULL;
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ID3v2ExtraMeta *id3v2_extra_meta = NULL;
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if (!s && !(s = avformat_alloc_context()))
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return AVERROR(ENOMEM);
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if (fmt)
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s->iformat = fmt;
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if (options)
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av_dict_copy(&tmp, *options, 0);
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if ((ret = av_opt_set_dict(s, &tmp)) < 0)
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goto fail;
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if ((ret = init_input(s, filename, &tmp)) < 0)
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goto fail;
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/* Check filename in case an image number is expected. */
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if (s->iformat->flags & AVFMT_NEEDNUMBER) {
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if (!av_filename_number_test(filename)) {
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ret = AVERROR(EINVAL);
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goto fail;
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}
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}
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s->duration = s->start_time = AV_NOPTS_VALUE;
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av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename));
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/* Allocate private data. */
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if (s->iformat->priv_data_size > 0) {
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if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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if (s->iformat->priv_class) {
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*(const AVClass **) s->priv_data = s->iformat->priv_class;
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av_opt_set_defaults(s->priv_data);
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if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0)
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goto fail;
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}
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}
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/* e.g. AVFMT_NOFILE formats will not have a AVIOContext */
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if (s->pb)
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ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
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if (s->iformat->read_header)
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if ((ret = s->iformat->read_header(s)) < 0)
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goto fail;
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|
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if (id3v2_extra_meta &&
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(ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0)
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goto fail;
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ff_id3v2_free_extra_meta(&id3v2_extra_meta);
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if ((ret = queue_attached_pictures(s)) < 0)
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goto fail;
|
|
|
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if (s->pb && !s->internal->data_offset)
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s->internal->data_offset = avio_tell(s->pb);
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s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
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|
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#if FF_API_LAVF_AVCTX
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update_stream_avctx(s);
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#endif
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for (i = 0; i < s->nb_streams; i++)
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s->streams[i]->internal->orig_codec_id = s->streams[i]->codecpar->codec_id;
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|
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if (options) {
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av_dict_free(options);
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*options = tmp;
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}
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*ps = s;
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return 0;
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|
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fail:
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ff_id3v2_free_extra_meta(&id3v2_extra_meta);
|
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av_dict_free(&tmp);
|
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if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO))
|
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avio_close(s->pb);
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avformat_free_context(s);
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*ps = NULL;
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return ret;
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}
|
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|
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/*******************************************************/
|
|
|
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static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
|
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{
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if (st->codecpar->codec_id == AV_CODEC_ID_PROBE) {
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AVProbeData *pd = &st->probe_data;
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av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
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--st->probe_packets;
|
|
|
|
if (pkt) {
|
|
int err;
|
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if ((err = av_reallocp(&pd->buf, pd->buf_size + pkt->size +
|
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AVPROBE_PADDING_SIZE)) < 0)
|
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return err;
|
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memcpy(pd->buf + pd->buf_size, pkt->data, pkt->size);
|
|
pd->buf_size += pkt->size;
|
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memset(pd->buf + pd->buf_size, 0, AVPROBE_PADDING_SIZE);
|
|
} else {
|
|
st->probe_packets = 0;
|
|
if (!pd->buf_size) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"nothing to probe for stream %d\n", st->index);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (!st->probe_packets ||
|
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av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) {
|
|
set_codec_from_probe_data(s, st, pd, st->probe_packets > 0
|
|
? AVPROBE_SCORE_MAX / 4 : 0);
|
|
if (st->codecpar->codec_id != AV_CODEC_ID_PROBE) {
|
|
pd->buf_size = 0;
|
|
av_freep(&pd->buf);
|
|
av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int ret, i, err;
|
|
AVStream *st;
|
|
|
|
for (;;) {
|
|
AVPacketList *pktl = s->internal->raw_packet_buffer;
|
|
|
|
if (pktl) {
|
|
*pkt = pktl->pkt;
|
|
st = s->streams[pkt->stream_index];
|
|
if (st->codecpar->codec_id != AV_CODEC_ID_PROBE ||
|
|
!st->probe_packets ||
|
|
s->internal->raw_packet_buffer_remaining_size < pkt->size) {
|
|
AVProbeData *pd;
|
|
if (st->probe_packets)
|
|
if ((err = probe_codec(s, st, NULL)) < 0)
|
|
return err;
|
|
pd = &st->probe_data;
|
|
av_freep(&pd->buf);
|
|
pd->buf_size = 0;
|
|
s->internal->raw_packet_buffer = pktl->next;
|
|
s->internal->raw_packet_buffer_remaining_size += pkt->size;
|
|
av_free(pktl);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
pkt->data = NULL;
|
|
pkt->size = 0;
|
|
av_init_packet(pkt);
|
|
ret = s->iformat->read_packet(s, pkt);
|
|
if (ret < 0) {
|
|
if (!pktl || ret == AVERROR(EAGAIN))
|
|
return ret;
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
st = s->streams[i];
|
|
if (st->probe_packets)
|
|
if ((err = probe_codec(s, st, NULL)) < 0)
|
|
return err;
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (!pkt->buf) {
|
|
AVPacket tmp = { 0 };
|
|
ret = av_packet_ref(&tmp, pkt);
|
|
if (ret < 0)
|
|
return ret;
|
|
*pkt = tmp;
|
|
}
|
|
|
|
if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
|
|
(pkt->flags & AV_PKT_FLAG_CORRUPT)) {
|
|
av_log(s, AV_LOG_WARNING,
|
|
"Dropped corrupted packet (stream = %d)\n",
|
|
pkt->stream_index);
|
|
av_packet_unref(pkt);
|
|
continue;
|
|
}
|
|
|
|
st = s->streams[pkt->stream_index];
|
|
|
|
switch (st->codecpar->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
if (s->video_codec_id)
|
|
st->codecpar->codec_id = s->video_codec_id;
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
if (s->audio_codec_id)
|
|
st->codecpar->codec_id = s->audio_codec_id;
|
|
break;
|
|
case AVMEDIA_TYPE_SUBTITLE:
|
|
if (s->subtitle_codec_id)
|
|
st->codecpar->codec_id = s->subtitle_codec_id;
|
|
break;
|
|
}
|
|
|
|
if (!pktl && (st->codecpar->codec_id != AV_CODEC_ID_PROBE ||
|
|
!st->probe_packets))
|
|
return ret;
|
|
|
|
err = add_to_pktbuf(&s->internal->raw_packet_buffer, pkt,
|
|
&s->internal->raw_packet_buffer_end, 0);
|
|
if (err)
|
|
return err;
|
|
s->internal->raw_packet_buffer_remaining_size -= pkt->size;
|
|
|
|
if ((err = probe_codec(s, st, pkt)) < 0)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
/**********************************************************/
|
|
|
|
/**
|
|
* Return the frame duration in seconds. Return 0 if not available.
|
|
*/
|
|
void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
|
|
AVCodecParserContext *pc, AVPacket *pkt)
|
|
{
|
|
AVRational codec_framerate = s->iformat ? st->internal->avctx->framerate :
|
|
(AVRational){ 0, 1 };
|
|
int frame_size;
|
|
|
|
*pnum = 0;
|
|
*pden = 0;
|
|
switch (st->codecpar->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
if (st->avg_frame_rate.num) {
|
|
*pnum = st->avg_frame_rate.den;
|
|
*pden = st->avg_frame_rate.num;
|
|
} else if (st->time_base.num * 1000LL > st->time_base.den) {
|
|
*pnum = st->time_base.num;
|
|
*pden = st->time_base.den;
|
|
} else if (codec_framerate.den * 1000LL > codec_framerate.num) {
|
|
*pnum = codec_framerate.den;
|
|
*pden = codec_framerate.num;
|
|
if (pc && pc->repeat_pict) {
|
|
if (*pnum > INT_MAX / (1 + pc->repeat_pict))
|
|
*pden /= 1 + pc->repeat_pict;
|
|
else
|
|
*pnum *= 1 + pc->repeat_pict;
|
|
}
|
|
/* If this codec can be interlaced or progressive then we need
|
|
* a parser to compute duration of a packet. Thus if we have
|
|
* no parser in such case leave duration undefined. */
|
|
if (st->internal->avctx->ticks_per_frame > 1 && !pc)
|
|
*pnum = *pden = 0;
|
|
}
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
|
|
if (frame_size <= 0 || st->codecpar->sample_rate <= 0)
|
|
break;
|
|
*pnum = frame_size;
|
|
*pden = st->codecpar->sample_rate;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int is_intra_only(enum AVCodecID id)
|
|
{
|
|
const AVCodecDescriptor *d = avcodec_descriptor_get(id);
|
|
if (!d)
|
|
return 0;
|
|
if (d->type == AVMEDIA_TYPE_VIDEO && !(d->props & AV_CODEC_PROP_INTRA_ONLY))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static void update_initial_timestamps(AVFormatContext *s, int stream_index,
|
|
int64_t dts, int64_t pts)
|
|
{
|
|
AVStream *st = s->streams[stream_index];
|
|
AVPacketList *pktl = s->internal->packet_buffer;
|
|
|
|
if (st->first_dts != AV_NOPTS_VALUE ||
|
|
dts == AV_NOPTS_VALUE ||
|
|
st->cur_dts == AV_NOPTS_VALUE)
|
|
return;
|
|
|
|
st->first_dts = dts - st->cur_dts;
|
|
st->cur_dts = dts;
|
|
|
|
for (; pktl; pktl = pktl->next) {
|
|
if (pktl->pkt.stream_index != stream_index)
|
|
continue;
|
|
// FIXME: think more about this check
|
|
if (pktl->pkt.pts != AV_NOPTS_VALUE && pktl->pkt.pts == pktl->pkt.dts)
|
|
pktl->pkt.pts += st->first_dts;
|
|
|
|
if (pktl->pkt.dts != AV_NOPTS_VALUE)
|
|
pktl->pkt.dts += st->first_dts;
|
|
|
|
if (st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE)
|
|
st->start_time = pktl->pkt.pts;
|
|
}
|
|
if (st->start_time == AV_NOPTS_VALUE)
|
|
st->start_time = pts;
|
|
}
|
|
|
|
static void update_initial_durations(AVFormatContext *s, AVStream *st,
|
|
int stream_index, int duration)
|
|
{
|
|
AVPacketList *pktl = s->internal->packet_buffer;
|
|
int64_t cur_dts = 0;
|
|
|
|
if (st->first_dts != AV_NOPTS_VALUE) {
|
|
cur_dts = st->first_dts;
|
|
for (; pktl; pktl = pktl->next) {
|
|
if (pktl->pkt.stream_index == stream_index) {
|
|
if (pktl->pkt.pts != pktl->pkt.dts ||
|
|
pktl->pkt.dts != AV_NOPTS_VALUE ||
|
|
pktl->pkt.duration)
|
|
break;
|
|
cur_dts -= duration;
|
|
}
|
|
}
|
|
pktl = s->internal->packet_buffer;
|
|
st->first_dts = cur_dts;
|
|
} else if (st->cur_dts)
|
|
return;
|
|
|
|
for (; pktl; pktl = pktl->next) {
|
|
if (pktl->pkt.stream_index != stream_index)
|
|
continue;
|
|
if (pktl->pkt.pts == pktl->pkt.dts &&
|
|
pktl->pkt.dts == AV_NOPTS_VALUE &&
|
|
!pktl->pkt.duration) {
|
|
pktl->pkt.dts = cur_dts;
|
|
if (!st->internal->avctx->has_b_frames)
|
|
pktl->pkt.pts = cur_dts;
|
|
cur_dts += duration;
|
|
if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
|
|
pktl->pkt.duration = duration;
|
|
} else
|
|
break;
|
|
}
|
|
if (st->first_dts == AV_NOPTS_VALUE)
|
|
st->cur_dts = cur_dts;
|
|
}
|
|
|
|
static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
|
|
AVCodecParserContext *pc, AVPacket *pkt)
|
|
{
|
|
int num, den, presentation_delayed, delay, i;
|
|
int64_t offset;
|
|
|
|
if (s->flags & AVFMT_FLAG_NOFILLIN)
|
|
return;
|
|
|
|
if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE)
|
|
pkt->dts = AV_NOPTS_VALUE;
|
|
|
|
/* do we have a video B-frame ? */
|
|
delay = st->internal->avctx->has_b_frames;
|
|
presentation_delayed = 0;
|
|
|
|
/* XXX: need has_b_frame, but cannot get it if the codec is
|
|
* not initialized */
|
|
if (delay &&
|
|
pc && pc->pict_type != AV_PICTURE_TYPE_B)
|
|
presentation_delayed = 1;
|
|
|
|
if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE &&
|
|
st->pts_wrap_bits < 63 &&
|
|
pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) {
|
|
pkt->dts -= 1LL << st->pts_wrap_bits;
|
|
}
|
|
|
|
/* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg).
|
|
* We take the conservative approach and discard both.
|
|
* Note: If this is misbehaving for an H.264 file, then possibly
|
|
* presentation_delayed is not set correctly. */
|
|
if (delay == 1 && pkt->dts == pkt->pts &&
|
|
pkt->dts != AV_NOPTS_VALUE && presentation_delayed) {
|
|
av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
|
|
pkt->dts = AV_NOPTS_VALUE;
|
|
}
|
|
|
|
if (pkt->duration == 0 && st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
|
|
ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
|
|
if (den && num) {
|
|
pkt->duration = av_rescale_rnd(1, num * (int64_t) st->time_base.den,
|
|
den * (int64_t) st->time_base.num,
|
|
AV_ROUND_DOWN);
|
|
|
|
if (pkt->duration != 0 && s->internal->packet_buffer)
|
|
update_initial_durations(s, st, pkt->stream_index,
|
|
pkt->duration);
|
|
}
|
|
}
|
|
|
|
/* Correct timestamps with byte offset if demuxers only have timestamps
|
|
* on packet boundaries */
|
|
if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) {
|
|
/* this will estimate bitrate based on this frame's duration and size */
|
|
offset = av_rescale(pc->offset, pkt->duration, pkt->size);
|
|
if (pkt->pts != AV_NOPTS_VALUE)
|
|
pkt->pts += offset;
|
|
if (pkt->dts != AV_NOPTS_VALUE)
|
|
pkt->dts += offset;
|
|
}
|
|
|
|
/* This may be redundant, but it should not hurt. */
|
|
if (pkt->dts != AV_NOPTS_VALUE &&
|
|
pkt->pts != AV_NOPTS_VALUE &&
|
|
pkt->pts > pkt->dts)
|
|
presentation_delayed = 1;
|
|
|
|
av_log(NULL, AV_LOG_TRACE,
|
|
"IN delayed:%d pts:%"PRId64", dts:%"PRId64" "
|
|
"cur_dts:%"PRId64" st:%d pc:%p\n",
|
|
presentation_delayed, pkt->pts, pkt->dts, st->cur_dts,
|
|
pkt->stream_index, pc);
|
|
/* Interpolate PTS and DTS if they are not present. We skip H.264
|
|
* currently because delay and has_b_frames are not reliably set. */
|
|
if ((delay == 0 || (delay == 1 && pc)) &&
|
|
st->codecpar->codec_id != AV_CODEC_ID_H264) {
|
|
if (presentation_delayed) {
|
|
/* DTS = decompression timestamp */
|
|
/* PTS = presentation timestamp */
|
|
if (pkt->dts == AV_NOPTS_VALUE)
|
|
pkt->dts = st->last_IP_pts;
|
|
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
|
|
if (pkt->dts == AV_NOPTS_VALUE)
|
|
pkt->dts = st->cur_dts;
|
|
|
|
/* This is tricky: the dts must be incremented by the duration
|
|
* of the frame we are displaying, i.e. the last I- or P-frame. */
|
|
if (st->last_IP_duration == 0)
|
|
st->last_IP_duration = pkt->duration;
|
|
if (pkt->dts != AV_NOPTS_VALUE)
|
|
st->cur_dts = pkt->dts + st->last_IP_duration;
|
|
st->last_IP_duration = pkt->duration;
|
|
st->last_IP_pts = pkt->pts;
|
|
/* Cannot compute PTS if not present (we can compute it only
|
|
* by knowing the future. */
|
|
} else if (pkt->pts != AV_NOPTS_VALUE ||
|
|
pkt->dts != AV_NOPTS_VALUE ||
|
|
pkt->duration ||
|
|
st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
int duration = pkt->duration;
|
|
if (!duration && st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
|
|
if (den && num) {
|
|
duration = av_rescale_rnd(1,
|
|
num * (int64_t) st->time_base.den,
|
|
den * (int64_t) st->time_base.num,
|
|
AV_ROUND_DOWN);
|
|
if (duration != 0 && s->internal->packet_buffer)
|
|
update_initial_durations(s, st, pkt->stream_index,
|
|
duration);
|
|
}
|
|
}
|
|
|
|
if (pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE ||
|
|
duration) {
|
|
/* presentation is not delayed : PTS and DTS are the same */
|
|
if (pkt->pts == AV_NOPTS_VALUE)
|
|
pkt->pts = pkt->dts;
|
|
update_initial_timestamps(s, pkt->stream_index, pkt->pts,
|
|
pkt->pts);
|
|
if (pkt->pts == AV_NOPTS_VALUE)
|
|
pkt->pts = st->cur_dts;
|
|
pkt->dts = pkt->pts;
|
|
if (pkt->pts != AV_NOPTS_VALUE)
|
|
st->cur_dts = pkt->pts + duration;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) {
|
|
st->pts_buffer[0] = pkt->pts;
|
|
for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++)
|
|
FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]);
|
|
if (pkt->dts == AV_NOPTS_VALUE)
|
|
pkt->dts = st->pts_buffer[0];
|
|
// We skipped it above so we try here.
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_H264)
|
|
// This should happen on the first packet
|
|
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts);
|
|
if (pkt->dts > st->cur_dts)
|
|
st->cur_dts = pkt->dts;
|
|
}
|
|
|
|
av_log(NULL, AV_LOG_TRACE,
|
|
"OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n",
|
|
presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts);
|
|
|
|
/* update flags */
|
|
if (is_intra_only(st->codecpar->codec_id))
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
#if FF_API_CONVERGENCE_DURATION
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
if (pc)
|
|
pkt->convergence_duration = pc->convergence_duration;
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
}
|
|
|
|
static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
|
|
{
|
|
while (*pkt_buf) {
|
|
AVPacketList *pktl = *pkt_buf;
|
|
*pkt_buf = pktl->next;
|
|
av_packet_unref(&pktl->pkt);
|
|
av_freep(&pktl);
|
|
}
|
|
*pkt_buf_end = NULL;
|
|
}
|
|
|
|
/**
|
|
* Parse a packet, add all split parts to parse_queue.
|
|
*
|
|
* @param pkt Packet to parse, NULL when flushing the parser at end of stream.
|
|
*/
|
|
static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
|
|
{
|
|
AVPacket out_pkt = { 0 }, flush_pkt = { 0 };
|
|
AVStream *st = s->streams[stream_index];
|
|
uint8_t *data = pkt ? pkt->data : NULL;
|
|
int size = pkt ? pkt->size : 0;
|
|
int ret = 0, got_output = 0;
|
|
|
|
if (!pkt) {
|
|
av_init_packet(&flush_pkt);
|
|
pkt = &flush_pkt;
|
|
got_output = 1;
|
|
}
|
|
|
|
while (size > 0 || (pkt == &flush_pkt && got_output)) {
|
|
int len;
|
|
|
|
av_init_packet(&out_pkt);
|
|
len = av_parser_parse2(st->parser, st->internal->avctx,
|
|
&out_pkt.data, &out_pkt.size, data, size,
|
|
pkt->pts, pkt->dts, pkt->pos);
|
|
|
|
pkt->pts = pkt->dts = AV_NOPTS_VALUE;
|
|
/* increment read pointer */
|
|
data += len;
|
|
size -= len;
|
|
|
|
got_output = !!out_pkt.size;
|
|
|
|
if (!out_pkt.size)
|
|
continue;
|
|
|
|
if (pkt->side_data) {
|
|
out_pkt.side_data = pkt->side_data;
|
|
out_pkt.side_data_elems = pkt->side_data_elems;
|
|
pkt->side_data = NULL;
|
|
pkt->side_data_elems = 0;
|
|
}
|
|
|
|
/* set the duration */
|
|
out_pkt.duration = 0;
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
if (st->internal->avctx->sample_rate > 0) {
|
|
out_pkt.duration =
|
|
av_rescale_q_rnd(st->parser->duration,
|
|
(AVRational) { 1, st->internal->avctx->sample_rate },
|
|
st->time_base,
|
|
AV_ROUND_DOWN);
|
|
}
|
|
}
|
|
|
|
out_pkt.stream_index = st->index;
|
|
out_pkt.pts = st->parser->pts;
|
|
out_pkt.dts = st->parser->dts;
|
|
out_pkt.pos = st->parser->pos;
|
|
|
|
if (st->parser->key_frame == 1 ||
|
|
(st->parser->key_frame == -1 &&
|
|
st->parser->pict_type == AV_PICTURE_TYPE_I))
|
|
out_pkt.flags |= AV_PKT_FLAG_KEY;
|
|
|
|
compute_pkt_fields(s, st, st->parser, &out_pkt);
|
|
|
|
if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
|
|
out_pkt.flags & AV_PKT_FLAG_KEY) {
|
|
ff_reduce_index(s, st->index);
|
|
av_add_index_entry(st, st->parser->frame_offset, out_pkt.dts,
|
|
0, 0, AVINDEX_KEYFRAME);
|
|
}
|
|
|
|
if ((ret = add_to_pktbuf(&s->internal->parse_queue, &out_pkt,
|
|
&s->internal->parse_queue_end,
|
|
1))) {
|
|
av_packet_unref(&out_pkt);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* end of the stream => close and free the parser */
|
|
if (pkt == &flush_pkt) {
|
|
av_parser_close(st->parser);
|
|
st->parser = NULL;
|
|
}
|
|
|
|
fail:
|
|
av_packet_unref(pkt);
|
|
return ret;
|
|
}
|
|
|
|
static int read_from_packet_buffer(AVPacketList **pkt_buffer,
|
|
AVPacketList **pkt_buffer_end,
|
|
AVPacket *pkt)
|
|
{
|
|
AVPacketList *pktl;
|
|
av_assert0(*pkt_buffer);
|
|
pktl = *pkt_buffer;
|
|
*pkt = pktl->pkt;
|
|
*pkt_buffer = pktl->next;
|
|
if (!pktl->next)
|
|
*pkt_buffer_end = NULL;
|
|
av_freep(&pktl);
|
|
return 0;
|
|
}
|
|
|
|
static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int ret = 0, i, got_packet = 0;
|
|
AVDictionary *metadata = NULL;
|
|
|
|
av_init_packet(pkt);
|
|
|
|
while (!got_packet && !s->internal->parse_queue) {
|
|
AVStream *st;
|
|
AVPacket cur_pkt;
|
|
|
|
/* read next packet */
|
|
ret = ff_read_packet(s, &cur_pkt);
|
|
if (ret < 0) {
|
|
if (ret == AVERROR(EAGAIN))
|
|
return ret;
|
|
/* flush the parsers */
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
st = s->streams[i];
|
|
if (st->parser && st->need_parsing)
|
|
parse_packet(s, NULL, st->index);
|
|
}
|
|
/* all remaining packets are now in parse_queue =>
|
|
* really terminate parsing */
|
|
break;
|
|
}
|
|
ret = 0;
|
|
st = s->streams[cur_pkt.stream_index];
|
|
|
|
if (cur_pkt.pts != AV_NOPTS_VALUE &&
|
|
cur_pkt.dts != AV_NOPTS_VALUE &&
|
|
cur_pkt.pts < cur_pkt.dts) {
|
|
av_log(s, AV_LOG_WARNING,
|
|
"Invalid timestamps stream=%d, pts=%"PRId64", "
|
|
"dts=%"PRId64", size=%d\n",
|
|
cur_pkt.stream_index, cur_pkt.pts,
|
|
cur_pkt.dts, cur_pkt.size);
|
|
}
|
|
if (s->debug & FF_FDEBUG_TS)
|
|
av_log(s, AV_LOG_DEBUG,
|
|
"ff_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", "
|
|
"size=%d, duration=%"PRId64", flags=%d\n",
|
|
cur_pkt.stream_index, cur_pkt.pts, cur_pkt.dts,
|
|
cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
|
|
|
|
if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) {
|
|
st->parser = av_parser_init(st->codecpar->codec_id);
|
|
if (!st->parser)
|
|
/* no parser available: just output the raw packets */
|
|
st->need_parsing = AVSTREAM_PARSE_NONE;
|
|
else if (st->need_parsing == AVSTREAM_PARSE_HEADERS)
|
|
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
|
|
else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE)
|
|
st->parser->flags |= PARSER_FLAG_ONCE;
|
|
}
|
|
|
|
if (!st->need_parsing || !st->parser) {
|
|
/* no parsing needed: we just output the packet as is */
|
|
*pkt = cur_pkt;
|
|
compute_pkt_fields(s, st, NULL, pkt);
|
|
if ((s->iformat->flags & AVFMT_GENERIC_INDEX) &&
|
|
(pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) {
|
|
ff_reduce_index(s, st->index);
|
|
av_add_index_entry(st, pkt->pos, pkt->dts,
|
|
0, 0, AVINDEX_KEYFRAME);
|
|
}
|
|
got_packet = 1;
|
|
} else if (st->discard < AVDISCARD_ALL) {
|
|
if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0)
|
|
return ret;
|
|
} else {
|
|
/* free packet */
|
|
av_packet_unref(&cur_pkt);
|
|
}
|
|
}
|
|
|
|
if (!got_packet && s->internal->parse_queue)
|
|
ret = read_from_packet_buffer(&s->internal->parse_queue, &s->internal->parse_queue_end, pkt);
|
|
|
|
av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
|
|
if (metadata) {
|
|
s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
|
|
av_dict_copy(&s->metadata, metadata, 0);
|
|
av_dict_free(&metadata);
|
|
av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN);
|
|
}
|
|
|
|
#if FF_API_LAVF_AVCTX
|
|
update_stream_avctx(s);
|
|
#endif
|
|
|
|
if (s->debug & FF_FDEBUG_TS)
|
|
av_log(s, AV_LOG_DEBUG,
|
|
"read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", "
|
|
"size=%d, duration=%"PRId64", flags=%d\n",
|
|
pkt->stream_index, pkt->pts, pkt->dts,
|
|
pkt->size, pkt->duration, pkt->flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
const int genpts = s->flags & AVFMT_FLAG_GENPTS;
|
|
int eof = 0;
|
|
|
|
if (!genpts)
|
|
return s->internal->packet_buffer
|
|
? read_from_packet_buffer(&s->internal->packet_buffer,
|
|
&s->internal->packet_buffer_end, pkt)
|
|
: read_frame_internal(s, pkt);
|
|
|
|
for (;;) {
|
|
int ret;
|
|
AVPacketList *pktl = s->internal->packet_buffer;
|
|
|
|
if (pktl) {
|
|
AVPacket *next_pkt = &pktl->pkt;
|
|
|
|
if (next_pkt->dts != AV_NOPTS_VALUE) {
|
|
int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits;
|
|
while (pktl && next_pkt->pts == AV_NOPTS_VALUE) {
|
|
if (pktl->pkt.stream_index == next_pkt->stream_index &&
|
|
(av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0) &&
|
|
av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) {
|
|
// not B-frame
|
|
next_pkt->pts = pktl->pkt.dts;
|
|
}
|
|
pktl = pktl->next;
|
|
}
|
|
pktl = s->internal->packet_buffer;
|
|
}
|
|
|
|
/* read packet from packet buffer, if there is data */
|
|
if (!(next_pkt->pts == AV_NOPTS_VALUE &&
|
|
next_pkt->dts != AV_NOPTS_VALUE && !eof))
|
|
return read_from_packet_buffer(&s->internal->packet_buffer,
|
|
&s->internal->packet_buffer_end, pkt);
|
|
}
|
|
|
|
ret = read_frame_internal(s, pkt);
|
|
if (ret < 0) {
|
|
if (pktl && ret != AVERROR(EAGAIN)) {
|
|
eof = 1;
|
|
continue;
|
|
} else
|
|
return ret;
|
|
}
|
|
|
|
ret = add_to_pktbuf(&s->internal->packet_buffer, pkt,
|
|
&s->internal->packet_buffer_end, 1);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* XXX: suppress the packet queue */
|
|
static void flush_packet_queue(AVFormatContext *s)
|
|
{
|
|
free_packet_buffer(&s->internal->parse_queue, &s->internal->parse_queue_end);
|
|
free_packet_buffer(&s->internal->packet_buffer, &s->internal->packet_buffer_end);
|
|
free_packet_buffer(&s->internal->raw_packet_buffer, &s->internal->raw_packet_buffer_end);
|
|
|
|
s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
|
|
}
|
|
|
|
/*******************************************************/
|
|
/* seek support */
|
|
|
|
int av_find_default_stream_index(AVFormatContext *s)
|
|
{
|
|
int first_audio_index = -1;
|
|
int i;
|
|
AVStream *st;
|
|
|
|
if (s->nb_streams <= 0)
|
|
return -1;
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
st = s->streams[i];
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
|
|
!(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
|
|
return i;
|
|
}
|
|
if (first_audio_index < 0 &&
|
|
st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
|
|
first_audio_index = i;
|
|
}
|
|
return first_audio_index >= 0 ? first_audio_index : 0;
|
|
}
|
|
|
|
/** Flush the frame reader. */
|
|
void ff_read_frame_flush(AVFormatContext *s)
|
|
{
|
|
AVStream *st;
|
|
int i, j;
|
|
|
|
flush_packet_queue(s);
|
|
|
|
/* Reset read state for each stream. */
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
st = s->streams[i];
|
|
|
|
if (st->parser) {
|
|
av_parser_close(st->parser);
|
|
st->parser = NULL;
|
|
}
|
|
st->last_IP_pts = AV_NOPTS_VALUE;
|
|
/* We set the current DTS to an unspecified origin. */
|
|
st->cur_dts = AV_NOPTS_VALUE;
|
|
|
|
st->probe_packets = MAX_PROBE_PACKETS;
|
|
|
|
for (j = 0; j < MAX_REORDER_DELAY + 1; j++)
|
|
st->pts_buffer[j] = AV_NOPTS_VALUE;
|
|
}
|
|
}
|
|
|
|
void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
|
|
st->cur_dts =
|
|
av_rescale(timestamp,
|
|
st->time_base.den * (int64_t) ref_st->time_base.num,
|
|
st->time_base.num * (int64_t) ref_st->time_base.den);
|
|
}
|
|
}
|
|
|
|
void ff_reduce_index(AVFormatContext *s, int stream_index)
|
|
{
|
|
AVStream *st = s->streams[stream_index];
|
|
unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry);
|
|
|
|
if ((unsigned) st->nb_index_entries >= max_entries) {
|
|
int i;
|
|
for (i = 0; 2 * i < st->nb_index_entries; i++)
|
|
st->index_entries[i] = st->index_entries[2 * i];
|
|
st->nb_index_entries = i;
|
|
}
|
|
}
|
|
|
|
int ff_add_index_entry(AVIndexEntry **index_entries,
|
|
int *nb_index_entries,
|
|
unsigned int *index_entries_allocated_size,
|
|
int64_t pos, int64_t timestamp,
|
|
int size, int distance, int flags)
|
|
{
|
|
AVIndexEntry *entries, *ie;
|
|
int index;
|
|
|
|
if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry))
|
|
return -1;
|
|
|
|
entries = av_fast_realloc(*index_entries,
|
|
index_entries_allocated_size,
|
|
(*nb_index_entries + 1) *
|
|
sizeof(AVIndexEntry));
|
|
if (!entries)
|
|
return -1;
|
|
|
|
*index_entries = entries;
|
|
|
|
index = ff_index_search_timestamp(*index_entries, *nb_index_entries,
|
|
timestamp, AVSEEK_FLAG_ANY);
|
|
|
|
if (index < 0) {
|
|
index = (*nb_index_entries)++;
|
|
ie = &entries[index];
|
|
assert(index == 0 || ie[-1].timestamp < timestamp);
|
|
} else {
|
|
ie = &entries[index];
|
|
if (ie->timestamp != timestamp) {
|
|
if (ie->timestamp <= timestamp)
|
|
return -1;
|
|
memmove(entries + index + 1, entries + index,
|
|
sizeof(AVIndexEntry) * (*nb_index_entries - index));
|
|
(*nb_index_entries)++;
|
|
} else if (ie->pos == pos && distance < ie->min_distance)
|
|
// do not reduce the distance
|
|
distance = ie->min_distance;
|
|
}
|
|
|
|
ie->pos = pos;
|
|
ie->timestamp = timestamp;
|
|
ie->min_distance = distance;
|
|
ie->size = size;
|
|
ie->flags = flags;
|
|
|
|
return index;
|
|
}
|
|
|
|
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
|
|
int size, int distance, int flags)
|
|
{
|
|
return ff_add_index_entry(&st->index_entries, &st->nb_index_entries,
|
|
&st->index_entries_allocated_size, pos,
|
|
timestamp, size, distance, flags);
|
|
}
|
|
|
|
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
|
|
int64_t wanted_timestamp, int flags)
|
|
{
|
|
int a, b, m;
|
|
int64_t timestamp;
|
|
|
|
a = -1;
|
|
b = nb_entries;
|
|
|
|
// Optimize appending index entries at the end.
|
|
if (b && entries[b - 1].timestamp < wanted_timestamp)
|
|
a = b - 1;
|
|
|
|
while (b - a > 1) {
|
|
m = (a + b) >> 1;
|
|
timestamp = entries[m].timestamp;
|
|
if (timestamp >= wanted_timestamp)
|
|
b = m;
|
|
if (timestamp <= wanted_timestamp)
|
|
a = m;
|
|
}
|
|
m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b;
|
|
|
|
if (!(flags & AVSEEK_FLAG_ANY))
|
|
while (m >= 0 && m < nb_entries &&
|
|
!(entries[m].flags & AVINDEX_KEYFRAME))
|
|
m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1;
|
|
|
|
if (m == nb_entries)
|
|
return -1;
|
|
return m;
|
|
}
|
|
|
|
int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags)
|
|
{
|
|
return ff_index_search_timestamp(st->index_entries, st->nb_index_entries,
|
|
wanted_timestamp, flags);
|
|
}
|
|
|
|
int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
|
|
int64_t target_ts, int flags)
|
|
{
|
|
AVInputFormat *avif = s->iformat;
|
|
int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
|
|
int64_t ts_min, ts_max, ts;
|
|
int index;
|
|
int64_t ret;
|
|
AVStream *st;
|
|
|
|
if (stream_index < 0)
|
|
return -1;
|
|
|
|
av_log(s, AV_LOG_TRACE, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
|
|
|
|
ts_max =
|
|
ts_min = AV_NOPTS_VALUE;
|
|
pos_limit = -1; // GCC falsely says it may be uninitialized.
|
|
|
|
st = s->streams[stream_index];
|
|
if (st->index_entries) {
|
|
AVIndexEntry *e;
|
|
|
|
/* FIXME: Whole function must be checked for non-keyframe entries in
|
|
* index case, especially read_timestamp(). */
|
|
index = av_index_search_timestamp(st, target_ts,
|
|
flags | AVSEEK_FLAG_BACKWARD);
|
|
index = FFMAX(index, 0);
|
|
e = &st->index_entries[index];
|
|
|
|
if (e->timestamp <= target_ts || e->pos == e->min_distance) {
|
|
pos_min = e->pos;
|
|
ts_min = e->timestamp;
|
|
av_log(s, AV_LOG_TRACE, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
|
|
pos_min, ts_min);
|
|
} else {
|
|
assert(index == 0);
|
|
}
|
|
|
|
index = av_index_search_timestamp(st, target_ts,
|
|
flags & ~AVSEEK_FLAG_BACKWARD);
|
|
assert(index < st->nb_index_entries);
|
|
if (index >= 0) {
|
|
e = &st->index_entries[index];
|
|
assert(e->timestamp >= target_ts);
|
|
pos_max = e->pos;
|
|
ts_max = e->timestamp;
|
|
pos_limit = pos_max - e->min_distance;
|
|
av_log(s, AV_LOG_TRACE, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
|
|
" dts_max=%"PRId64"\n", pos_max, pos_limit, ts_max);
|
|
}
|
|
}
|
|
|
|
pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit,
|
|
ts_min, ts_max, flags, &ts, avif->read_timestamp);
|
|
if (pos < 0)
|
|
return -1;
|
|
|
|
/* do the seek */
|
|
if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0)
|
|
return ret;
|
|
|
|
ff_update_cur_dts(s, st, ts);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
|
|
int64_t pos_min, int64_t pos_max, int64_t pos_limit,
|
|
int64_t ts_min, int64_t ts_max,
|
|
int flags, int64_t *ts_ret,
|
|
int64_t (*read_timestamp)(struct AVFormatContext *, int,
|
|
int64_t *, int64_t))
|
|
{
|
|
int64_t pos, ts;
|
|
int64_t start_pos, filesize;
|
|
int no_change;
|
|
|
|
av_log(s, AV_LOG_TRACE, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
|
|
|
|
if (ts_min == AV_NOPTS_VALUE) {
|
|
pos_min = s->internal->data_offset;
|
|
ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
|
|
if (ts_min == AV_NOPTS_VALUE)
|
|
return -1;
|
|
}
|
|
|
|
if (ts_max == AV_NOPTS_VALUE) {
|
|
int step = 1024;
|
|
filesize = avio_size(s->pb);
|
|
pos_max = filesize - 1;
|
|
do {
|
|
pos_max -= step;
|
|
ts_max = read_timestamp(s, stream_index, &pos_max,
|
|
pos_max + step);
|
|
step += step;
|
|
} while (ts_max == AV_NOPTS_VALUE && pos_max >= step);
|
|
if (ts_max == AV_NOPTS_VALUE)
|
|
return -1;
|
|
|
|
for (;;) {
|
|
int64_t tmp_pos = pos_max + 1;
|
|
int64_t tmp_ts = read_timestamp(s, stream_index,
|
|
&tmp_pos, INT64_MAX);
|
|
if (tmp_ts == AV_NOPTS_VALUE)
|
|
break;
|
|
ts_max = tmp_ts;
|
|
pos_max = tmp_pos;
|
|
if (tmp_pos >= filesize)
|
|
break;
|
|
}
|
|
pos_limit = pos_max;
|
|
}
|
|
|
|
if (ts_min > ts_max)
|
|
return -1;
|
|
else if (ts_min == ts_max)
|
|
pos_limit = pos_min;
|
|
|
|
no_change = 0;
|
|
while (pos_min < pos_limit) {
|
|
av_log(s, AV_LOG_TRACE, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64
|
|
" dts_max=%"PRId64"\n", pos_min, pos_max, ts_min, ts_max);
|
|
assert(pos_limit <= pos_max);
|
|
|
|
if (no_change == 0) {
|
|
int64_t approximate_keyframe_distance = pos_max - pos_limit;
|
|
// interpolate position (better than dichotomy)
|
|
pos = av_rescale(target_ts - ts_min, pos_max - pos_min,
|
|
ts_max - ts_min) +
|
|
pos_min - approximate_keyframe_distance;
|
|
} else if (no_change == 1) {
|
|
// bisection if interpolation did not change min / max pos last time
|
|
pos = (pos_min + pos_limit) >> 1;
|
|
} else {
|
|
/* linear search if bisection failed, can only happen if there
|
|
* are very few or no keyframes between min/max */
|
|
pos = pos_min;
|
|
}
|
|
if (pos <= pos_min)
|
|
pos = pos_min + 1;
|
|
else if (pos > pos_limit)
|
|
pos = pos_limit;
|
|
start_pos = pos;
|
|
|
|
// May pass pos_limit instead of -1.
|
|
ts = read_timestamp(s, stream_index, &pos, INT64_MAX);
|
|
if (pos == pos_max)
|
|
no_change++;
|
|
else
|
|
no_change = 0;
|
|
av_log(s, AV_LOG_TRACE, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64
|
|
" target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
|
|
pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
|
|
pos_limit, start_pos, no_change);
|
|
if (ts == AV_NOPTS_VALUE) {
|
|
av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n");
|
|
return -1;
|
|
}
|
|
assert(ts != AV_NOPTS_VALUE);
|
|
if (target_ts <= ts) {
|
|
pos_limit = start_pos - 1;
|
|
pos_max = pos;
|
|
ts_max = ts;
|
|
}
|
|
if (target_ts >= ts) {
|
|
pos_min = pos;
|
|
ts_min = ts;
|
|
}
|
|
}
|
|
|
|
pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
|
|
ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max;
|
|
pos_min = pos;
|
|
ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
|
|
pos_min++;
|
|
ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
|
|
av_log(s, AV_LOG_TRACE, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
|
|
pos, ts_min, target_ts, ts_max);
|
|
*ts_ret = ts;
|
|
return pos;
|
|
}
|
|
|
|
static int seek_frame_byte(AVFormatContext *s, int stream_index,
|
|
int64_t pos, int flags)
|
|
{
|
|
int64_t pos_min, pos_max;
|
|
|
|
pos_min = s->internal->data_offset;
|
|
pos_max = avio_size(s->pb) - 1;
|
|
|
|
if (pos < pos_min)
|
|
pos = pos_min;
|
|
else if (pos > pos_max)
|
|
pos = pos_max;
|
|
|
|
avio_seek(s->pb, pos, SEEK_SET);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int seek_frame_generic(AVFormatContext *s, int stream_index,
|
|
int64_t timestamp, int flags)
|
|
{
|
|
int index;
|
|
int64_t ret;
|
|
AVStream *st;
|
|
AVIndexEntry *ie;
|
|
|
|
st = s->streams[stream_index];
|
|
|
|
index = av_index_search_timestamp(st, timestamp, flags);
|
|
|
|
if (index < 0 && st->nb_index_entries &&
|
|
timestamp < st->index_entries[0].timestamp)
|
|
return -1;
|
|
|
|
if (index < 0 || index == st->nb_index_entries - 1) {
|
|
AVPacket pkt;
|
|
|
|
if (st->nb_index_entries) {
|
|
assert(st->index_entries);
|
|
ie = &st->index_entries[st->nb_index_entries - 1];
|
|
if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
|
|
return ret;
|
|
ff_update_cur_dts(s, st, ie->timestamp);
|
|
} else {
|
|
if ((ret = avio_seek(s->pb, s->internal->data_offset, SEEK_SET)) < 0)
|
|
return ret;
|
|
}
|
|
for (;;) {
|
|
int read_status;
|
|
do {
|
|
read_status = av_read_frame(s, &pkt);
|
|
} while (read_status == AVERROR(EAGAIN));
|
|
if (read_status < 0)
|
|
break;
|
|
av_packet_unref(&pkt);
|
|
if (stream_index == pkt.stream_index)
|
|
if ((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
|
|
break;
|
|
}
|
|
index = av_index_search_timestamp(st, timestamp, flags);
|
|
}
|
|
if (index < 0)
|
|
return -1;
|
|
|
|
ff_read_frame_flush(s);
|
|
if (s->iformat->read_seek)
|
|
if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0)
|
|
return 0;
|
|
ie = &st->index_entries[index];
|
|
if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0)
|
|
return ret;
|
|
ff_update_cur_dts(s, st, ie->timestamp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int seek_frame_internal(AVFormatContext *s, int stream_index,
|
|
int64_t timestamp, int flags)
|
|
{
|
|
int ret;
|
|
AVStream *st;
|
|
|
|
if (flags & AVSEEK_FLAG_BYTE) {
|
|
if (s->iformat->flags & AVFMT_NO_BYTE_SEEK)
|
|
return -1;
|
|
ff_read_frame_flush(s);
|
|
return seek_frame_byte(s, stream_index, timestamp, flags);
|
|
}
|
|
|
|
if (stream_index < 0) {
|
|
stream_index = av_find_default_stream_index(s);
|
|
if (stream_index < 0)
|
|
return -1;
|
|
|
|
st = s->streams[stream_index];
|
|
/* timestamp for default must be expressed in AV_TIME_BASE units */
|
|
timestamp = av_rescale(timestamp, st->time_base.den,
|
|
AV_TIME_BASE * (int64_t) st->time_base.num);
|
|
}
|
|
|
|
/* first, we try the format specific seek */
|
|
if (s->iformat->read_seek) {
|
|
ff_read_frame_flush(s);
|
|
ret = s->iformat->read_seek(s, stream_index, timestamp, flags);
|
|
} else
|
|
ret = -1;
|
|
if (ret >= 0)
|
|
return 0;
|
|
|
|
if (s->iformat->read_timestamp &&
|
|
!(s->iformat->flags & AVFMT_NOBINSEARCH)) {
|
|
ff_read_frame_flush(s);
|
|
return ff_seek_frame_binary(s, stream_index, timestamp, flags);
|
|
} else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) {
|
|
ff_read_frame_flush(s);
|
|
return seek_frame_generic(s, stream_index, timestamp, flags);
|
|
} else
|
|
return -1;
|
|
}
|
|
|
|
int av_seek_frame(AVFormatContext *s, int stream_index,
|
|
int64_t timestamp, int flags)
|
|
{
|
|
int ret = seek_frame_internal(s, stream_index, timestamp, flags);
|
|
|
|
if (ret >= 0)
|
|
ret = queue_attached_pictures(s);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts,
|
|
int64_t ts, int64_t max_ts, int flags)
|
|
{
|
|
if (min_ts > ts || max_ts < ts)
|
|
return -1;
|
|
|
|
if (s->iformat->read_seek2) {
|
|
int ret;
|
|
ff_read_frame_flush(s);
|
|
ret = s->iformat->read_seek2(s, stream_index, min_ts,
|
|
ts, max_ts, flags);
|
|
|
|
if (ret >= 0)
|
|
ret = queue_attached_pictures(s);
|
|
return ret;
|
|
}
|
|
|
|
if (s->iformat->read_timestamp) {
|
|
// try to seek via read_timestamp()
|
|
}
|
|
|
|
// Fall back on old API if new is not implemented but old is.
|
|
// Note the old API has somewhat different semantics.
|
|
if (s->iformat->read_seek || 1)
|
|
return av_seek_frame(s, stream_index, ts,
|
|
flags | ((uint64_t) ts - min_ts >
|
|
(uint64_t) max_ts - ts
|
|
? AVSEEK_FLAG_BACKWARD : 0));
|
|
|
|
// try some generic seek like seek_frame_generic() but with new ts semantics
|
|
}
|
|
|
|
/*******************************************************/
|
|
|
|
/**
|
|
* Return TRUE if the stream has accurate duration in any stream.
|
|
*
|
|
* @return TRUE if the stream has accurate duration for at least one component.
|
|
*/
|
|
static int has_duration(AVFormatContext *ic)
|
|
{
|
|
int i;
|
|
AVStream *st;
|
|
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->duration != AV_NOPTS_VALUE)
|
|
return 1;
|
|
}
|
|
if (ic->duration != AV_NOPTS_VALUE)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Estimate the stream timings from the one of each components.
|
|
*
|
|
* Also computes the global bitrate if possible.
|
|
*/
|
|
static void update_stream_timings(AVFormatContext *ic)
|
|
{
|
|
int64_t start_time, start_time1, end_time, end_time1;
|
|
int64_t duration, duration1, filesize;
|
|
int i;
|
|
AVStream *st;
|
|
|
|
start_time = INT64_MAX;
|
|
end_time = INT64_MIN;
|
|
duration = INT64_MIN;
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
|
|
start_time1 = av_rescale_q(st->start_time, st->time_base,
|
|
AV_TIME_BASE_Q);
|
|
start_time = FFMIN(start_time, start_time1);
|
|
if (st->duration != AV_NOPTS_VALUE) {
|
|
end_time1 = start_time1 +
|
|
av_rescale_q(st->duration, st->time_base,
|
|
AV_TIME_BASE_Q);
|
|
end_time = FFMAX(end_time, end_time1);
|
|
}
|
|
}
|
|
if (st->duration != AV_NOPTS_VALUE) {
|
|
duration1 = av_rescale_q(st->duration, st->time_base,
|
|
AV_TIME_BASE_Q);
|
|
duration = FFMAX(duration, duration1);
|
|
}
|
|
}
|
|
if (start_time != INT64_MAX) {
|
|
ic->start_time = start_time;
|
|
if (end_time != INT64_MIN)
|
|
duration = FFMAX(duration, end_time - start_time);
|
|
}
|
|
if (duration != INT64_MIN) {
|
|
ic->duration = duration;
|
|
if (ic->pb && (filesize = avio_size(ic->pb)) > 0)
|
|
/* compute the bitrate */
|
|
ic->bit_rate = (double) filesize * 8.0 * AV_TIME_BASE /
|
|
(double) ic->duration;
|
|
}
|
|
}
|
|
|
|
static void fill_all_stream_timings(AVFormatContext *ic)
|
|
{
|
|
int i;
|
|
AVStream *st;
|
|
|
|
update_stream_timings(ic);
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->start_time == AV_NOPTS_VALUE) {
|
|
if (ic->start_time != AV_NOPTS_VALUE)
|
|
st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q,
|
|
st->time_base);
|
|
if (ic->duration != AV_NOPTS_VALUE)
|
|
st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q,
|
|
st->time_base);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void estimate_timings_from_bit_rate(AVFormatContext *ic)
|
|
{
|
|
int64_t filesize, duration;
|
|
int i;
|
|
AVStream *st;
|
|
|
|
/* if bit_rate is already set, we believe it */
|
|
if (ic->bit_rate <= 0) {
|
|
int bit_rate = 0;
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->codecpar->bit_rate > 0) {
|
|
if (INT_MAX - st->codecpar->bit_rate < bit_rate) {
|
|
bit_rate = 0;
|
|
break;
|
|
}
|
|
bit_rate += st->codecpar->bit_rate;
|
|
}
|
|
}
|
|
ic->bit_rate = bit_rate;
|
|
}
|
|
|
|
/* if duration is already set, we believe it */
|
|
if (ic->duration == AV_NOPTS_VALUE &&
|
|
ic->bit_rate != 0) {
|
|
filesize = ic->pb ? avio_size(ic->pb) : 0;
|
|
if (filesize > 0) {
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
duration = av_rescale(8 * filesize, st->time_base.den,
|
|
ic->bit_rate *
|
|
(int64_t) st->time_base.num);
|
|
if (st->duration == AV_NOPTS_VALUE)
|
|
st->duration = duration;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#define DURATION_MAX_READ_SIZE 250000
|
|
#define DURATION_MAX_RETRY 3
|
|
|
|
/* only usable for MPEG-PS streams */
|
|
static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
|
|
{
|
|
AVPacket pkt1, *pkt = &pkt1;
|
|
AVStream *st;
|
|
int read_size, i, ret;
|
|
int64_t end_time;
|
|
int64_t filesize, offset, duration;
|
|
int retry = 0;
|
|
|
|
/* flush packet queue */
|
|
flush_packet_queue(ic);
|
|
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE)
|
|
av_log(ic, AV_LOG_WARNING,
|
|
"start time is not set in estimate_timings_from_pts\n");
|
|
|
|
if (st->parser) {
|
|
av_parser_close(st->parser);
|
|
st->parser = NULL;
|
|
}
|
|
}
|
|
|
|
/* estimate the end time (duration) */
|
|
/* XXX: may need to support wrapping */
|
|
filesize = ic->pb ? avio_size(ic->pb) : 0;
|
|
end_time = AV_NOPTS_VALUE;
|
|
do {
|
|
offset = filesize - (DURATION_MAX_READ_SIZE << retry);
|
|
if (offset < 0)
|
|
offset = 0;
|
|
|
|
avio_seek(ic->pb, offset, SEEK_SET);
|
|
read_size = 0;
|
|
for (;;) {
|
|
if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0)))
|
|
break;
|
|
|
|
do {
|
|
ret = ff_read_packet(ic, pkt);
|
|
} while (ret == AVERROR(EAGAIN));
|
|
if (ret != 0)
|
|
break;
|
|
read_size += pkt->size;
|
|
st = ic->streams[pkt->stream_index];
|
|
if (pkt->pts != AV_NOPTS_VALUE &&
|
|
(st->start_time != AV_NOPTS_VALUE ||
|
|
st->first_dts != AV_NOPTS_VALUE)) {
|
|
duration = end_time = pkt->pts;
|
|
if (st->start_time != AV_NOPTS_VALUE)
|
|
duration -= st->start_time;
|
|
else
|
|
duration -= st->first_dts;
|
|
if (duration < 0)
|
|
duration += 1LL << st->pts_wrap_bits;
|
|
if (duration > 0) {
|
|
if (st->duration == AV_NOPTS_VALUE || st->duration < duration)
|
|
st->duration = duration;
|
|
}
|
|
}
|
|
av_packet_unref(pkt);
|
|
}
|
|
} while (end_time == AV_NOPTS_VALUE &&
|
|
filesize > (DURATION_MAX_READ_SIZE << retry) &&
|
|
++retry <= DURATION_MAX_RETRY);
|
|
|
|
fill_all_stream_timings(ic);
|
|
|
|
avio_seek(ic->pb, old_offset, SEEK_SET);
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
st->cur_dts = st->first_dts;
|
|
st->last_IP_pts = AV_NOPTS_VALUE;
|
|
}
|
|
}
|
|
|
|
static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
|
|
{
|
|
int64_t file_size;
|
|
|
|
/* get the file size, if possible */
|
|
if (ic->iformat->flags & AVFMT_NOFILE) {
|
|
file_size = 0;
|
|
} else {
|
|
file_size = avio_size(ic->pb);
|
|
file_size = FFMAX(0, file_size);
|
|
}
|
|
|
|
if ((!strcmp(ic->iformat->name, "mpeg") ||
|
|
!strcmp(ic->iformat->name, "mpegts")) &&
|
|
file_size && ic->pb->seekable) {
|
|
/* get accurate estimate from the PTSes */
|
|
estimate_timings_from_pts(ic, old_offset);
|
|
} else if (has_duration(ic)) {
|
|
/* at least one component has timings - we use them for all
|
|
* the components */
|
|
fill_all_stream_timings(ic);
|
|
} else {
|
|
av_log(ic, AV_LOG_WARNING,
|
|
"Estimating duration from bitrate, this may be inaccurate\n");
|
|
/* less precise: use bitrate info */
|
|
estimate_timings_from_bit_rate(ic);
|
|
}
|
|
update_stream_timings(ic);
|
|
|
|
{
|
|
int i;
|
|
AVStream av_unused *st;
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
av_log(ic, AV_LOG_TRACE, "%d: start_time: %0.3f duration: %0.3f\n", i,
|
|
(double) st->start_time / AV_TIME_BASE,
|
|
(double) st->duration / AV_TIME_BASE);
|
|
}
|
|
av_log(ic, AV_LOG_TRACE,
|
|
"stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
|
|
(double) ic->start_time / AV_TIME_BASE,
|
|
(double) ic->duration / AV_TIME_BASE,
|
|
ic->bit_rate / 1000);
|
|
}
|
|
}
|
|
|
|
static int has_codec_parameters(AVStream *st)
|
|
{
|
|
AVCodecContext *avctx = st->internal->avctx;
|
|
int val;
|
|
|
|
switch (avctx->codec_type) {
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
val = avctx->sample_rate && avctx->channels;
|
|
if (st->info->found_decoder >= 0 &&
|
|
avctx->sample_fmt == AV_SAMPLE_FMT_NONE)
|
|
return 0;
|
|
break;
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
val = avctx->width;
|
|
if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE)
|
|
return 0;
|
|
break;
|
|
default:
|
|
val = 1;
|
|
break;
|
|
}
|
|
return avctx->codec_id != AV_CODEC_ID_NONE && val != 0;
|
|
}
|
|
|
|
static int has_decode_delay_been_guessed(AVStream *st)
|
|
{
|
|
return st->internal->avctx->codec_id != AV_CODEC_ID_H264 ||
|
|
st->info->nb_decoded_frames >= 6;
|
|
}
|
|
|
|
/* returns 1 or 0 if or if not decoded data was returned, or a negative error */
|
|
static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt,
|
|
AVDictionary **options)
|
|
{
|
|
AVCodecContext *avctx = st->internal->avctx;
|
|
const AVCodec *codec;
|
|
int got_picture = 1, ret = 0;
|
|
AVFrame *frame = av_frame_alloc();
|
|
AVPacket pkt = *avpkt;
|
|
|
|
if (!frame)
|
|
return AVERROR(ENOMEM);
|
|
|
|
if (!avcodec_is_open(avctx) && !st->info->found_decoder) {
|
|
AVDictionary *thread_opt = NULL;
|
|
|
|
#if FF_API_LAVF_AVCTX
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
codec = st->codec->codec ? st->codec->codec
|
|
: avcodec_find_decoder(st->codecpar->codec_id);
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#else
|
|
codec = avcodec_find_decoder(st->codecpar->codec_id);
|
|
#endif
|
|
|
|
if (!codec) {
|
|
st->info->found_decoder = -1;
|
|
ret = -1;
|
|
goto fail;
|
|
}
|
|
|
|
/* Force thread count to 1 since the H.264 decoder will not extract
|
|
* SPS and PPS to extradata during multi-threaded decoding. */
|
|
av_dict_set(options ? options : &thread_opt, "threads", "1", 0);
|
|
ret = avcodec_open2(avctx, codec, options ? options : &thread_opt);
|
|
if (!options)
|
|
av_dict_free(&thread_opt);
|
|
if (ret < 0) {
|
|
st->info->found_decoder = -1;
|
|
goto fail;
|
|
}
|
|
st->info->found_decoder = 1;
|
|
} else if (!st->info->found_decoder)
|
|
st->info->found_decoder = 1;
|
|
|
|
if (st->info->found_decoder < 0) {
|
|
ret = -1;
|
|
goto fail;
|
|
}
|
|
|
|
while ((pkt.size > 0 || (!pkt.data && got_picture)) &&
|
|
ret >= 0 &&
|
|
(!has_codec_parameters(st) || !has_decode_delay_been_guessed(st) ||
|
|
(!st->codec_info_nb_frames &&
|
|
(avctx->codec->capabilities & AV_CODEC_CAP_CHANNEL_CONF)))) {
|
|
got_picture = 0;
|
|
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
|
|
avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
ret = avcodec_send_packet(avctx, &pkt);
|
|
if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
|
|
break;
|
|
if (ret >= 0)
|
|
pkt.size = 0;
|
|
ret = avcodec_receive_frame(avctx, frame);
|
|
if (ret >= 0)
|
|
got_picture = 1;
|
|
if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
|
|
ret = 0;
|
|
}
|
|
if (ret >= 0) {
|
|
if (got_picture)
|
|
st->info->nb_decoded_frames++;
|
|
ret = got_picture;
|
|
}
|
|
}
|
|
|
|
fail:
|
|
av_frame_free(&frame);
|
|
return ret;
|
|
}
|
|
|
|
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
|
|
{
|
|
while (tags->id != AV_CODEC_ID_NONE) {
|
|
if (tags->id == id)
|
|
return tags->tag;
|
|
tags++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
|
|
{
|
|
int i;
|
|
for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
|
|
if (tag == tags[i].tag)
|
|
return tags[i].id;
|
|
for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++)
|
|
if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag))
|
|
return tags[i].id;
|
|
return AV_CODEC_ID_NONE;
|
|
}
|
|
|
|
enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
|
|
{
|
|
if (flt) {
|
|
switch (bps) {
|
|
case 32:
|
|
return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
|
|
case 64:
|
|
return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE;
|
|
default:
|
|
return AV_CODEC_ID_NONE;
|
|
}
|
|
} else {
|
|
bps >>= 3;
|
|
if (sflags & (1 << (bps - 1))) {
|
|
switch (bps) {
|
|
case 1:
|
|
return AV_CODEC_ID_PCM_S8;
|
|
case 2:
|
|
return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
|
|
case 3:
|
|
return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
|
|
case 4:
|
|
return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
|
|
default:
|
|
return AV_CODEC_ID_NONE;
|
|
}
|
|
} else {
|
|
switch (bps) {
|
|
case 1:
|
|
return AV_CODEC_ID_PCM_U8;
|
|
case 2:
|
|
return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE;
|
|
case 3:
|
|
return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE;
|
|
case 4:
|
|
return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE;
|
|
default:
|
|
return AV_CODEC_ID_NONE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id)
|
|
{
|
|
int i;
|
|
for (i = 0; tags && tags[i]; i++) {
|
|
int tag = ff_codec_get_tag(tags[i], id);
|
|
if (tag)
|
|
return tag;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag)
|
|
{
|
|
int i;
|
|
for (i = 0; tags && tags[i]; i++) {
|
|
enum AVCodecID id = ff_codec_get_id(tags[i], tag);
|
|
if (id != AV_CODEC_ID_NONE)
|
|
return id;
|
|
}
|
|
return AV_CODEC_ID_NONE;
|
|
}
|
|
|
|
static void compute_chapters_end(AVFormatContext *s)
|
|
{
|
|
unsigned int i, j;
|
|
int64_t max_time = s->duration +
|
|
((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time);
|
|
|
|
for (i = 0; i < s->nb_chapters; i++)
|
|
if (s->chapters[i]->end == AV_NOPTS_VALUE) {
|
|
AVChapter *ch = s->chapters[i];
|
|
int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q,
|
|
ch->time_base)
|
|
: INT64_MAX;
|
|
|
|
for (j = 0; j < s->nb_chapters; j++) {
|
|
AVChapter *ch1 = s->chapters[j];
|
|
int64_t next_start = av_rescale_q(ch1->start, ch1->time_base,
|
|
ch->time_base);
|
|
if (j != i && next_start > ch->start && next_start < end)
|
|
end = next_start;
|
|
}
|
|
ch->end = (end == INT64_MAX) ? ch->start : end;
|
|
}
|
|
}
|
|
|
|
static int get_std_framerate(int i)
|
|
{
|
|
if (i < 60 * 12)
|
|
return (i + 1) * 1001;
|
|
else
|
|
return ((const int[]) { 24, 30, 60, 12, 15 })[i - 60 * 12] * 1000 * 12;
|
|
}
|
|
|
|
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
|
|
{
|
|
int i, count, ret, read_size, j;
|
|
AVStream *st;
|
|
AVCodecContext *avctx;
|
|
AVPacket pkt1, *pkt;
|
|
int64_t old_offset = avio_tell(ic->pb);
|
|
// new streams might appear, no options for those
|
|
int orig_nb_streams = ic->nb_streams;
|
|
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
const AVCodec *codec;
|
|
AVDictionary *thread_opt = NULL;
|
|
st = ic->streams[i];
|
|
avctx = st->internal->avctx;
|
|
|
|
// only for the split stuff
|
|
if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) {
|
|
st->parser = av_parser_init(st->codecpar->codec_id);
|
|
if (st->need_parsing == AVSTREAM_PARSE_HEADERS && st->parser)
|
|
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
|
|
}
|
|
|
|
/* check if the caller has overridden the codec id */
|
|
#if FF_API_LAVF_AVCTX
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
if (st->codec->codec_id != st->internal->orig_codec_id) {
|
|
st->codecpar->codec_id = st->codec->codec_id;
|
|
st->codecpar->codec_type = st->codec->codec_type;
|
|
st->internal->orig_codec_id = st->codec->codec_id;
|
|
}
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
if (st->codecpar->codec_id != st->internal->orig_codec_id)
|
|
st->internal->orig_codec_id = st->codecpar->codec_id;
|
|
|
|
ret = avcodec_parameters_to_context(avctx, st->codecpar);
|
|
if (ret < 0)
|
|
goto find_stream_info_err;
|
|
if (st->codecpar->codec_id != AV_CODEC_ID_PROBE &&
|
|
st->codecpar->codec_id != AV_CODEC_ID_NONE)
|
|
st->internal->avctx_inited = 1;
|
|
|
|
#if FF_API_LAVF_AVCTX
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
codec = st->codec->codec ? st->codec->codec
|
|
: avcodec_find_decoder(st->codecpar->codec_id);
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#else
|
|
codec = avcodec_find_decoder(st->codecpar->codec_id);
|
|
#endif
|
|
|
|
/* Force thread count to 1 since the H.264 decoder will not extract
|
|
* SPS and PPS to extradata during multi-threaded decoding. */
|
|
av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0);
|
|
|
|
/* Ensure that subtitle_header is properly set. */
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE
|
|
&& codec && !avctx->codec)
|
|
avcodec_open2(avctx, codec,
|
|
options ? &options[i] : &thread_opt);
|
|
|
|
// Try to just open decoders, in case this is enough to get parameters.
|
|
if (!has_codec_parameters(st)) {
|
|
if (codec && !avctx->codec)
|
|
avcodec_open2(avctx, codec,
|
|
options ? &options[i] : &thread_opt);
|
|
}
|
|
if (!options)
|
|
av_dict_free(&thread_opt);
|
|
}
|
|
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE;
|
|
ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE;
|
|
}
|
|
|
|
count = 0;
|
|
read_size = 0;
|
|
for (;;) {
|
|
if (ff_check_interrupt(&ic->interrupt_callback)) {
|
|
ret = AVERROR_EXIT;
|
|
av_log(ic, AV_LOG_DEBUG, "interrupted\n");
|
|
break;
|
|
}
|
|
|
|
/* check if one codec still needs to be handled */
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
int fps_analyze_framecount = 20;
|
|
|
|
st = ic->streams[i];
|
|
if (!has_codec_parameters(st))
|
|
break;
|
|
/* If the timebase is coarse (like the usual millisecond precision
|
|
* of mkv), we need to analyze more frames to reliably arrive at
|
|
* the correct fps. */
|
|
if (av_q2d(st->time_base) > 0.0005)
|
|
fps_analyze_framecount *= 2;
|
|
if (ic->fps_probe_size >= 0)
|
|
fps_analyze_framecount = ic->fps_probe_size;
|
|
/* variable fps and no guess at the real fps */
|
|
if (!st->avg_frame_rate.num &&
|
|
st->codec_info_nb_frames < fps_analyze_framecount &&
|
|
st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
|
|
break;
|
|
if (st->parser && st->parser->parser->split &&
|
|
!st->codecpar->extradata)
|
|
break;
|
|
if (st->first_dts == AV_NOPTS_VALUE &&
|
|
st->codec_info_nb_frames < ic->max_ts_probe &&
|
|
(st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
|
|
st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO))
|
|
break;
|
|
}
|
|
if (i == ic->nb_streams) {
|
|
/* NOTE: If the format has no header, then we need to read some
|
|
* packets to get most of the streams, so we cannot stop here. */
|
|
if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) {
|
|
/* If we found the info for all the codecs, we can stop. */
|
|
ret = count;
|
|
av_log(ic, AV_LOG_DEBUG, "All info found\n");
|
|
break;
|
|
}
|
|
}
|
|
/* We did not get all the codec info, but we read too much data. */
|
|
if (read_size >= ic->probesize) {
|
|
ret = count;
|
|
av_log(ic, AV_LOG_DEBUG,
|
|
"Probe buffer size limit %d reached\n", ic->probesize);
|
|
break;
|
|
}
|
|
|
|
/* NOTE: A new stream can be added there if no header in file
|
|
* (AVFMTCTX_NOHEADER). */
|
|
ret = read_frame_internal(ic, &pkt1);
|
|
if (ret == AVERROR(EAGAIN))
|
|
continue;
|
|
|
|
if (ret < 0) {
|
|
/* EOF or error*/
|
|
AVPacket empty_pkt = { 0 };
|
|
int err = 0;
|
|
av_init_packet(&empty_pkt);
|
|
|
|
/* We could not have all the codec parameters before EOF. */
|
|
ret = -1;
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
|
|
/* flush the decoders */
|
|
if (st->info->found_decoder == 1) {
|
|
do {
|
|
err = try_decode_frame(ic, st, &empty_pkt,
|
|
(options && i < orig_nb_streams)
|
|
? &options[i] : NULL);
|
|
} while (err > 0 && !has_codec_parameters(st));
|
|
}
|
|
|
|
if (err < 0) {
|
|
av_log(ic, AV_LOG_WARNING,
|
|
"decoding for stream %d failed\n", st->index);
|
|
} else if (!has_codec_parameters(st)) {
|
|
char buf[256];
|
|
avcodec_string(buf, sizeof(buf), st->internal->avctx, 0);
|
|
av_log(ic, AV_LOG_WARNING,
|
|
"Could not find codec parameters (%s)\n", buf);
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
pkt = &pkt1;
|
|
|
|
if (!(ic->flags & AVFMT_FLAG_NOBUFFER)) {
|
|
ret = add_to_pktbuf(&ic->internal->packet_buffer, pkt,
|
|
&ic->internal->packet_buffer_end, 0);
|
|
if (ret < 0)
|
|
goto find_stream_info_err;
|
|
}
|
|
|
|
read_size += pkt->size;
|
|
|
|
st = ic->streams[pkt->stream_index];
|
|
avctx = st->internal->avctx;
|
|
if (!st->internal->avctx_inited) {
|
|
ret = avcodec_parameters_to_context(avctx, st->codecpar);
|
|
if (ret < 0)
|
|
goto find_stream_info_err;
|
|
st->internal->avctx_inited = 1;
|
|
}
|
|
|
|
if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) {
|
|
/* check for non-increasing dts */
|
|
if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
|
|
st->info->fps_last_dts >= pkt->dts) {
|
|
av_log(ic, AV_LOG_WARNING,
|
|
"Non-increasing DTS in stream %d: packet %d with DTS "
|
|
"%"PRId64", packet %d with DTS %"PRId64"\n",
|
|
st->index, st->info->fps_last_dts_idx,
|
|
st->info->fps_last_dts, st->codec_info_nb_frames,
|
|
pkt->dts);
|
|
st->info->fps_first_dts =
|
|
st->info->fps_last_dts = AV_NOPTS_VALUE;
|
|
}
|
|
/* Check for a discontinuity in dts. If the difference in dts
|
|
* is more than 1000 times the average packet duration in the
|
|
* sequence, we treat it as a discontinuity. */
|
|
if (st->info->fps_last_dts != AV_NOPTS_VALUE &&
|
|
st->info->fps_last_dts_idx > st->info->fps_first_dts_idx &&
|
|
(pkt->dts - st->info->fps_last_dts) / 1000 >
|
|
(st->info->fps_last_dts - st->info->fps_first_dts) /
|
|
(st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) {
|
|
av_log(ic, AV_LOG_WARNING,
|
|
"DTS discontinuity in stream %d: packet %d with DTS "
|
|
"%"PRId64", packet %d with DTS %"PRId64"\n",
|
|
st->index, st->info->fps_last_dts_idx,
|
|
st->info->fps_last_dts, st->codec_info_nb_frames,
|
|
pkt->dts);
|
|
st->info->fps_first_dts =
|
|
st->info->fps_last_dts = AV_NOPTS_VALUE;
|
|
}
|
|
|
|
/* update stored dts values */
|
|
if (st->info->fps_first_dts == AV_NOPTS_VALUE) {
|
|
st->info->fps_first_dts = pkt->dts;
|
|
st->info->fps_first_dts_idx = st->codec_info_nb_frames;
|
|
}
|
|
st->info->fps_last_dts = pkt->dts;
|
|
st->info->fps_last_dts_idx = st->codec_info_nb_frames;
|
|
|
|
/* check max_analyze_duration */
|
|
if (av_rescale_q(pkt->dts - st->info->fps_first_dts, st->time_base,
|
|
AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
|
|
av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached\n",
|
|
ic->max_analyze_duration);
|
|
if (ic->flags & AVFMT_FLAG_NOBUFFER)
|
|
av_packet_unref(pkt);
|
|
break;
|
|
}
|
|
}
|
|
if (st->parser && st->parser->parser->split && !avctx->extradata) {
|
|
int i = st->parser->parser->split(avctx, pkt->data, pkt->size);
|
|
if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
|
|
avctx->extradata_size = i;
|
|
avctx->extradata = av_mallocz(avctx->extradata_size +
|
|
AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!avctx->extradata)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(avctx->extradata, pkt->data,
|
|
avctx->extradata_size);
|
|
}
|
|
}
|
|
|
|
/* If still no information, we try to open the codec and to
|
|
* decompress the frame. We try to avoid that in most cases as
|
|
* it takes longer and uses more memory. For MPEG-4, we need to
|
|
* decompress for QuickTime.
|
|
*
|
|
* If AV_CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
|
|
* least one frame of codec data, this makes sure the codec initializes
|
|
* the channel configuration and does not only trust the values from
|
|
* the container. */
|
|
try_decode_frame(ic, st, pkt,
|
|
(options && i < orig_nb_streams) ? &options[i] : NULL);
|
|
|
|
if (ic->flags & AVFMT_FLAG_NOBUFFER)
|
|
av_packet_unref(pkt);
|
|
|
|
st->codec_info_nb_frames++;
|
|
count++;
|
|
}
|
|
|
|
// close codecs which were opened in try_decode_frame()
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
avcodec_close(st->internal->avctx);
|
|
}
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
avctx = st->internal->avctx;
|
|
if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
/* estimate average framerate if not set by demuxer */
|
|
if (!st->avg_frame_rate.num &&
|
|
st->info->fps_last_dts != st->info->fps_first_dts) {
|
|
int64_t delta_dts = st->info->fps_last_dts -
|
|
st->info->fps_first_dts;
|
|
int delta_packets = st->info->fps_last_dts_idx -
|
|
st->info->fps_first_dts_idx;
|
|
int best_fps = 0;
|
|
double best_error = 0.01;
|
|
|
|
if (delta_dts >= INT64_MAX / st->time_base.num ||
|
|
delta_packets >= INT64_MAX / st->time_base.den ||
|
|
delta_dts < 0)
|
|
continue;
|
|
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
|
|
delta_packets * (int64_t) st->time_base.den,
|
|
delta_dts * (int64_t) st->time_base.num, 60000);
|
|
|
|
/* Round guessed framerate to a "standard" framerate if it's
|
|
* within 1% of the original estimate. */
|
|
for (j = 0; j < MAX_STD_TIMEBASES; j++) {
|
|
AVRational std_fps = { get_std_framerate(j), 12 * 1001 };
|
|
double error = fabs(av_q2d(st->avg_frame_rate) /
|
|
av_q2d(std_fps) - 1);
|
|
|
|
if (error < best_error) {
|
|
best_error = error;
|
|
best_fps = std_fps.num;
|
|
}
|
|
}
|
|
if (best_fps)
|
|
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den,
|
|
best_fps, 12 * 1001, INT_MAX);
|
|
}
|
|
} else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
|
|
if (!avctx->bits_per_coded_sample)
|
|
avctx->bits_per_coded_sample =
|
|
av_get_bits_per_sample(avctx->codec_id);
|
|
// set stream disposition based on audio service type
|
|
switch (avctx->audio_service_type) {
|
|
case AV_AUDIO_SERVICE_TYPE_EFFECTS:
|
|
st->disposition = AV_DISPOSITION_CLEAN_EFFECTS;
|
|
break;
|
|
case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED:
|
|
st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED;
|
|
break;
|
|
case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED:
|
|
st->disposition = AV_DISPOSITION_HEARING_IMPAIRED;
|
|
break;
|
|
case AV_AUDIO_SERVICE_TYPE_COMMENTARY:
|
|
st->disposition = AV_DISPOSITION_COMMENT;
|
|
break;
|
|
case AV_AUDIO_SERVICE_TYPE_KARAOKE:
|
|
st->disposition = AV_DISPOSITION_KARAOKE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
compute_chapters_end(ic);
|
|
|
|
/* update the stream parameters from the internal codec contexts */
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
st = ic->streams[i];
|
|
if (!st->internal->avctx_inited)
|
|
continue;
|
|
|
|
ret = avcodec_parameters_from_context(st->codecpar, st->internal->avctx);
|
|
if (ret < 0)
|
|
goto find_stream_info_err;
|
|
|
|
#if FF_API_LAVF_AVCTX
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
ret = avcodec_parameters_to_context(st->codec, st->codecpar);
|
|
if (ret < 0)
|
|
goto find_stream_info_err;
|
|
|
|
if (st->internal->avctx->subtitle_header) {
|
|
st->codec->subtitle_header = av_malloc(st->internal->avctx->subtitle_header_size);
|
|
if (!st->codec->subtitle_header)
|
|
goto find_stream_info_err;
|
|
st->codec->subtitle_header_size = st->internal->avctx->subtitle_header_size;
|
|
memcpy(st->codec->subtitle_header, st->internal->avctx->subtitle_header,
|
|
st->codec->subtitle_header_size);
|
|
}
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
|
|
st->internal->avctx_inited = 0;
|
|
}
|
|
|
|
estimate_timings(ic, old_offset);
|
|
|
|
find_stream_info_err:
|
|
for (i = 0; i < ic->nb_streams; i++) {
|
|
av_freep(&ic->streams[i]->info);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static AVProgram *find_program_from_stream(AVFormatContext *ic, int s)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < ic->nb_programs; i++)
|
|
for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++)
|
|
if (ic->programs[i]->stream_index[j] == s)
|
|
return ic->programs[i];
|
|
return NULL;
|
|
}
|
|
|
|
int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type,
|
|
int wanted_stream_nb, int related_stream,
|
|
AVCodec **decoder_ret, int flags)
|
|
{
|
|
int i, nb_streams = ic->nb_streams;
|
|
int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1;
|
|
unsigned *program = NULL;
|
|
AVCodec *decoder = NULL, *best_decoder = NULL;
|
|
|
|
if (related_stream >= 0 && wanted_stream_nb < 0) {
|
|
AVProgram *p = find_program_from_stream(ic, related_stream);
|
|
if (p) {
|
|
program = p->stream_index;
|
|
nb_streams = p->nb_stream_indexes;
|
|
}
|
|
}
|
|
for (i = 0; i < nb_streams; i++) {
|
|
int real_stream_index = program ? program[i] : i;
|
|
AVStream *st = ic->streams[real_stream_index];
|
|
AVCodecParameters *par = st->codecpar;
|
|
if (par->codec_type != type)
|
|
continue;
|
|
if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
|
|
continue;
|
|
if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED |
|
|
AV_DISPOSITION_VISUAL_IMPAIRED))
|
|
continue;
|
|
if (decoder_ret) {
|
|
decoder = avcodec_find_decoder(par->codec_id);
|
|
if (!decoder) {
|
|
if (ret < 0)
|
|
ret = AVERROR_DECODER_NOT_FOUND;
|
|
continue;
|
|
}
|
|
}
|
|
if (best_count >= st->codec_info_nb_frames)
|
|
continue;
|
|
best_count = st->codec_info_nb_frames;
|
|
ret = real_stream_index;
|
|
best_decoder = decoder;
|
|
if (program && i == nb_streams - 1 && ret < 0) {
|
|
program = NULL;
|
|
nb_streams = ic->nb_streams;
|
|
/* no related stream found, try again with everything */
|
|
i = 0;
|
|
}
|
|
}
|
|
if (decoder_ret)
|
|
*decoder_ret = best_decoder;
|
|
return ret;
|
|
}
|
|
|
|
/*******************************************************/
|
|
|
|
int av_read_play(AVFormatContext *s)
|
|
{
|
|
if (s->iformat->read_play)
|
|
return s->iformat->read_play(s);
|
|
if (s->pb)
|
|
return avio_pause(s->pb, 0);
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
int av_read_pause(AVFormatContext *s)
|
|
{
|
|
if (s->iformat->read_pause)
|
|
return s->iformat->read_pause(s);
|
|
if (s->pb)
|
|
return avio_pause(s->pb, 1);
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
static void free_stream(AVStream **pst)
|
|
{
|
|
AVStream *st = *pst;
|
|
int i;
|
|
|
|
if (!st)
|
|
return;
|
|
|
|
for (i = 0; i < st->nb_side_data; i++)
|
|
av_freep(&st->side_data[i].data);
|
|
av_freep(&st->side_data);
|
|
|
|
if (st->parser)
|
|
av_parser_close(st->parser);
|
|
|
|
if (st->attached_pic.data)
|
|
av_packet_unref(&st->attached_pic);
|
|
|
|
if (st->internal) {
|
|
avcodec_free_context(&st->internal->avctx);
|
|
}
|
|
av_freep(&st->internal);
|
|
|
|
av_dict_free(&st->metadata);
|
|
avcodec_parameters_free(&st->codecpar);
|
|
av_freep(&st->probe_data.buf);
|
|
av_free(st->index_entries);
|
|
#if FF_API_LAVF_AVCTX
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
av_free(st->codec->extradata);
|
|
av_free(st->codec->subtitle_header);
|
|
av_free(st->codec);
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
av_free(st->priv_data);
|
|
av_free(st->info);
|
|
|
|
av_freep(pst);
|
|
}
|
|
|
|
void avformat_free_context(AVFormatContext *s)
|
|
{
|
|
int i;
|
|
|
|
if (!s)
|
|
return;
|
|
|
|
av_opt_free(s);
|
|
if (s->iformat && s->iformat->priv_class && s->priv_data)
|
|
av_opt_free(s->priv_data);
|
|
|
|
for (i = 0; i < s->nb_streams; i++)
|
|
free_stream(&s->streams[i]);
|
|
|
|
for (i = s->nb_programs - 1; i >= 0; i--) {
|
|
av_dict_free(&s->programs[i]->metadata);
|
|
av_freep(&s->programs[i]->stream_index);
|
|
av_freep(&s->programs[i]);
|
|
}
|
|
av_freep(&s->programs);
|
|
av_freep(&s->priv_data);
|
|
while (s->nb_chapters--) {
|
|
av_dict_free(&s->chapters[s->nb_chapters]->metadata);
|
|
av_free(s->chapters[s->nb_chapters]);
|
|
}
|
|
av_freep(&s->chapters);
|
|
av_dict_free(&s->metadata);
|
|
av_freep(&s->streams);
|
|
av_freep(&s->internal);
|
|
av_free(s);
|
|
}
|
|
|
|
void avformat_close_input(AVFormatContext **ps)
|
|
{
|
|
AVFormatContext *s = *ps;
|
|
AVIOContext *pb = s->pb;
|
|
|
|
if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) ||
|
|
(s->flags & AVFMT_FLAG_CUSTOM_IO))
|
|
pb = NULL;
|
|
|
|
flush_packet_queue(s);
|
|
|
|
if (s->iformat)
|
|
if (s->iformat->read_close)
|
|
s->iformat->read_close(s);
|
|
|
|
avformat_free_context(s);
|
|
|
|
*ps = NULL;
|
|
|
|
avio_close(pb);
|
|
}
|
|
|
|
AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
|
|
{
|
|
AVStream *st;
|
|
int i;
|
|
|
|
if (av_reallocp_array(&s->streams, s->nb_streams + 1,
|
|
sizeof(*s->streams)) < 0) {
|
|
s->nb_streams = 0;
|
|
return NULL;
|
|
}
|
|
|
|
st = av_mallocz(sizeof(AVStream));
|
|
if (!st)
|
|
return NULL;
|
|
if (!(st->info = av_mallocz(sizeof(*st->info)))) {
|
|
av_free(st);
|
|
return NULL;
|
|
}
|
|
|
|
#if FF_API_LAVF_AVCTX
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
st->codec = avcodec_alloc_context3(c);
|
|
if (!st->codec) {
|
|
av_free(st->info);
|
|
av_free(st);
|
|
return NULL;
|
|
}
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
|
|
st->internal = av_mallocz(sizeof(*st->internal));
|
|
if (!st->internal)
|
|
goto fail;
|
|
|
|
if (s->iformat) {
|
|
#if FF_API_LAVF_AVCTX
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
/* no default bitrate if decoding */
|
|
st->codec->bit_rate = 0;
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
|
|
/* default pts setting is MPEG-like */
|
|
avpriv_set_pts_info(st, 33, 1, 90000);
|
|
/* we set the current DTS to 0 so that formats without any timestamps
|
|
* but durations get some timestamps, formats with some unknown
|
|
* timestamps have their first few packets buffered and the
|
|
* timestamps corrected before they are returned to the user */
|
|
st->cur_dts = 0;
|
|
} else {
|
|
st->cur_dts = AV_NOPTS_VALUE;
|
|
}
|
|
|
|
st->codecpar = avcodec_parameters_alloc();
|
|
if (!st->codecpar)
|
|
goto fail;
|
|
|
|
st->internal->avctx = avcodec_alloc_context3(NULL);
|
|
if (!st->internal->avctx)
|
|
goto fail;
|
|
|
|
st->index = s->nb_streams;
|
|
st->start_time = AV_NOPTS_VALUE;
|
|
st->duration = AV_NOPTS_VALUE;
|
|
st->first_dts = AV_NOPTS_VALUE;
|
|
st->probe_packets = MAX_PROBE_PACKETS;
|
|
|
|
st->last_IP_pts = AV_NOPTS_VALUE;
|
|
for (i = 0; i < MAX_REORDER_DELAY + 1; i++)
|
|
st->pts_buffer[i] = AV_NOPTS_VALUE;
|
|
|
|
st->sample_aspect_ratio = (AVRational) { 0, 1 };
|
|
|
|
st->info->fps_first_dts = AV_NOPTS_VALUE;
|
|
st->info->fps_last_dts = AV_NOPTS_VALUE;
|
|
|
|
#if FF_API_LAVF_AVCTX
|
|
st->internal->need_codec_update = 1;
|
|
#endif
|
|
|
|
s->streams[s->nb_streams++] = st;
|
|
return st;
|
|
fail:
|
|
free_stream(&st);
|
|
return NULL;
|
|
}
|
|
|
|
AVProgram *av_new_program(AVFormatContext *ac, int id)
|
|
{
|
|
AVProgram *program = NULL;
|
|
int i;
|
|
|
|
av_log(ac, AV_LOG_TRACE, "new_program: id=0x%04x\n", id);
|
|
|
|
for (i = 0; i < ac->nb_programs; i++)
|
|
if (ac->programs[i]->id == id)
|
|
program = ac->programs[i];
|
|
|
|
if (!program) {
|
|
program = av_mallocz(sizeof(AVProgram));
|
|
if (!program)
|
|
return NULL;
|
|
dynarray_add(&ac->programs, &ac->nb_programs, program);
|
|
program->discard = AVDISCARD_NONE;
|
|
}
|
|
program->id = id;
|
|
|
|
return program;
|
|
}
|
|
|
|
AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base,
|
|
int64_t start, int64_t end, const char *title)
|
|
{
|
|
AVChapter *chapter = NULL;
|
|
int i;
|
|
|
|
for (i = 0; i < s->nb_chapters; i++)
|
|
if (s->chapters[i]->id == id)
|
|
chapter = s->chapters[i];
|
|
|
|
if (!chapter) {
|
|
chapter = av_mallocz(sizeof(AVChapter));
|
|
if (!chapter)
|
|
return NULL;
|
|
dynarray_add(&s->chapters, &s->nb_chapters, chapter);
|
|
}
|
|
av_dict_set(&chapter->metadata, "title", title, 0);
|
|
chapter->id = id;
|
|
chapter->time_base = time_base;
|
|
chapter->start = start;
|
|
chapter->end = end;
|
|
|
|
return chapter;
|
|
}
|
|
|
|
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx)
|
|
{
|
|
int i, j;
|
|
AVProgram *program = NULL;
|
|
|
|
if (idx >= ac->nb_streams) {
|
|
av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < ac->nb_programs; i++) {
|
|
if (ac->programs[i]->id != progid)
|
|
continue;
|
|
program = ac->programs[i];
|
|
for (j = 0; j < program->nb_stream_indexes; j++)
|
|
if (program->stream_index[j] == idx)
|
|
return;
|
|
|
|
if (av_reallocp_array(&program->stream_index,
|
|
program->nb_stream_indexes + 1,
|
|
sizeof(*program->stream_index)) < 0) {
|
|
program->nb_stream_indexes = 0;
|
|
return;
|
|
}
|
|
program->stream_index[program->nb_stream_indexes++] = idx;
|
|
return;
|
|
}
|
|
}
|
|
|
|
uint64_t ff_ntp_time(void)
|
|
{
|
|
return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US;
|
|
}
|
|
|
|
int av_get_frame_filename(char *buf, int buf_size, const char *path, int number)
|
|
{
|
|
const char *p;
|
|
char *q, buf1[20], c;
|
|
int nd, len, percentd_found;
|
|
|
|
q = buf;
|
|
p = path;
|
|
percentd_found = 0;
|
|
for (;;) {
|
|
c = *p++;
|
|
if (c == '\0')
|
|
break;
|
|
if (c == '%') {
|
|
do {
|
|
nd = 0;
|
|
while (av_isdigit(*p))
|
|
nd = nd * 10 + *p++ - '0';
|
|
c = *p++;
|
|
} while (av_isdigit(c));
|
|
|
|
switch (c) {
|
|
case '%':
|
|
goto addchar;
|
|
case 'd':
|
|
if (percentd_found)
|
|
goto fail;
|
|
percentd_found = 1;
|
|
snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
|
|
len = strlen(buf1);
|
|
if ((q - buf + len) > buf_size - 1)
|
|
goto fail;
|
|
memcpy(q, buf1, len);
|
|
q += len;
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
} else {
|
|
addchar:
|
|
if ((q - buf) < buf_size - 1)
|
|
*q++ = c;
|
|
}
|
|
}
|
|
if (!percentd_found)
|
|
goto fail;
|
|
*q = '\0';
|
|
return 0;
|
|
fail:
|
|
*q = '\0';
|
|
return -1;
|
|
}
|
|
|
|
void av_url_split(char *proto, int proto_size,
|
|
char *authorization, int authorization_size,
|
|
char *hostname, int hostname_size,
|
|
int *port_ptr, char *path, int path_size, const char *url)
|
|
{
|
|
const char *p, *ls, *at, *col, *brk;
|
|
|
|
if (port_ptr)
|
|
*port_ptr = -1;
|
|
if (proto_size > 0)
|
|
proto[0] = 0;
|
|
if (authorization_size > 0)
|
|
authorization[0] = 0;
|
|
if (hostname_size > 0)
|
|
hostname[0] = 0;
|
|
if (path_size > 0)
|
|
path[0] = 0;
|
|
|
|
/* parse protocol */
|
|
if ((p = strchr(url, ':'))) {
|
|
av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url));
|
|
p++; /* skip ':' */
|
|
if (*p == '/')
|
|
p++;
|
|
if (*p == '/')
|
|
p++;
|
|
} else {
|
|
/* no protocol means plain filename */
|
|
av_strlcpy(path, url, path_size);
|
|
return;
|
|
}
|
|
|
|
/* separate path from hostname */
|
|
ls = strchr(p, '/');
|
|
if (!ls)
|
|
ls = strchr(p, '?');
|
|
if (ls)
|
|
av_strlcpy(path, ls, path_size);
|
|
else
|
|
ls = &p[strlen(p)]; // XXX
|
|
|
|
/* the rest is hostname, use that to parse auth/port */
|
|
if (ls != p) {
|
|
/* authorization (user[:pass]@hostname) */
|
|
if ((at = strchr(p, '@')) && at < ls) {
|
|
av_strlcpy(authorization, p,
|
|
FFMIN(authorization_size, at + 1 - p));
|
|
p = at + 1; /* skip '@' */
|
|
}
|
|
|
|
if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) {
|
|
/* [host]:port */
|
|
av_strlcpy(hostname, p + 1,
|
|
FFMIN(hostname_size, brk - p));
|
|
if (brk[1] == ':' && port_ptr)
|
|
*port_ptr = atoi(brk + 2);
|
|
} else if ((col = strchr(p, ':')) && col < ls) {
|
|
av_strlcpy(hostname, p,
|
|
FFMIN(col + 1 - p, hostname_size));
|
|
if (port_ptr)
|
|
*port_ptr = atoi(col + 1);
|
|
} else
|
|
av_strlcpy(hostname, p,
|
|
FFMIN(ls + 1 - p, hostname_size));
|
|
}
|
|
}
|
|
|
|
char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
|
|
{
|
|
int i;
|
|
static const char hex_table_uc[16] = { '0', '1', '2', '3',
|
|
'4', '5', '6', '7',
|
|
'8', '9', 'A', 'B',
|
|
'C', 'D', 'E', 'F' };
|
|
static const char hex_table_lc[16] = { '0', '1', '2', '3',
|
|
'4', '5', '6', '7',
|
|
'8', '9', 'a', 'b',
|
|
'c', 'd', 'e', 'f' };
|
|
const char *hex_table = lowercase ? hex_table_lc : hex_table_uc;
|
|
|
|
for (i = 0; i < s; i++) {
|
|
buff[i * 2] = hex_table[src[i] >> 4];
|
|
buff[i * 2 + 1] = hex_table[src[i] & 0xF];
|
|
}
|
|
|
|
return buff;
|
|
}
|
|
|
|
int ff_hex_to_data(uint8_t *data, const char *p)
|
|
{
|
|
int c, len, v;
|
|
|
|
len = 0;
|
|
v = 1;
|
|
for (;;) {
|
|
p += strspn(p, SPACE_CHARS);
|
|
if (*p == '\0')
|
|
break;
|
|
c = av_toupper((unsigned char) *p++);
|
|
if (c >= '0' && c <= '9')
|
|
c = c - '0';
|
|
else if (c >= 'A' && c <= 'F')
|
|
c = c - 'A' + 10;
|
|
else
|
|
break;
|
|
v = (v << 4) | c;
|
|
if (v & 0x100) {
|
|
if (data)
|
|
data[len] = v;
|
|
len++;
|
|
v = 1;
|
|
}
|
|
}
|
|
return len;
|
|
}
|
|
|
|
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
|
|
unsigned int pts_num, unsigned int pts_den)
|
|
{
|
|
AVRational new_tb;
|
|
if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) {
|
|
if (new_tb.num != pts_num)
|
|
av_log(NULL, AV_LOG_DEBUG,
|
|
"st:%d removing common factor %d from timebase\n",
|
|
s->index, pts_num / new_tb.num);
|
|
} else
|
|
av_log(NULL, AV_LOG_WARNING,
|
|
"st:%d has too large timebase, reducing\n", s->index);
|
|
|
|
if (new_tb.num <= 0 || new_tb.den <= 0) {
|
|
av_log(NULL, AV_LOG_ERROR,
|
|
"Ignoring attempt to set invalid timebase for st:%d\n",
|
|
s->index);
|
|
return;
|
|
}
|
|
s->time_base = new_tb;
|
|
s->pts_wrap_bits = pts_wrap_bits;
|
|
}
|
|
|
|
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
|
|
void *context)
|
|
{
|
|
const char *ptr = str;
|
|
|
|
/* Parse key=value pairs. */
|
|
for (;;) {
|
|
const char *key;
|
|
char *dest = NULL, *dest_end;
|
|
int key_len, dest_len = 0;
|
|
|
|
/* Skip whitespace and potential commas. */
|
|
while (*ptr && (av_isspace(*ptr) || *ptr == ','))
|
|
ptr++;
|
|
if (!*ptr)
|
|
break;
|
|
|
|
key = ptr;
|
|
|
|
if (!(ptr = strchr(key, '=')))
|
|
break;
|
|
ptr++;
|
|
key_len = ptr - key;
|
|
|
|
callback_get_buf(context, key, key_len, &dest, &dest_len);
|
|
dest_end = dest + dest_len - 1;
|
|
|
|
if (*ptr == '\"') {
|
|
ptr++;
|
|
while (*ptr && *ptr != '\"') {
|
|
if (*ptr == '\\') {
|
|
if (!ptr[1])
|
|
break;
|
|
if (dest && dest < dest_end)
|
|
*dest++ = ptr[1];
|
|
ptr += 2;
|
|
} else {
|
|
if (dest && dest < dest_end)
|
|
*dest++ = *ptr;
|
|
ptr++;
|
|
}
|
|
}
|
|
if (*ptr == '\"')
|
|
ptr++;
|
|
} else {
|
|
for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++)
|
|
if (dest && dest < dest_end)
|
|
*dest++ = *ptr;
|
|
}
|
|
if (dest)
|
|
*dest = 0;
|
|
}
|
|
}
|
|
|
|
int ff_find_stream_index(AVFormatContext *s, int id)
|
|
{
|
|
int i;
|
|
for (i = 0; i < s->nb_streams; i++)
|
|
if (s->streams[i]->id == id)
|
|
return i;
|
|
return -1;
|
|
}
|
|
|
|
int64_t ff_iso8601_to_unix_time(const char *datestr)
|
|
{
|
|
struct tm time1 = { 0 }, time2 = { 0 };
|
|
const char *ret1, *ret2;
|
|
ret1 = av_small_strptime(datestr, "%Y - %m - %d %T", &time1);
|
|
ret2 = av_small_strptime(datestr, "%Y - %m - %dT%T", &time2);
|
|
if (ret2 && !ret1)
|
|
return av_timegm(&time2);
|
|
else
|
|
return av_timegm(&time1);
|
|
}
|
|
|
|
int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id,
|
|
int std_compliance)
|
|
{
|
|
if (ofmt) {
|
|
if (ofmt->query_codec)
|
|
return ofmt->query_codec(codec_id, std_compliance);
|
|
else if (ofmt->codec_tag)
|
|
return !!av_codec_get_tag(ofmt->codec_tag, codec_id);
|
|
else if (codec_id == ofmt->video_codec ||
|
|
codec_id == ofmt->audio_codec ||
|
|
codec_id == ofmt->subtitle_codec)
|
|
return 1;
|
|
}
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
int avformat_network_init(void)
|
|
{
|
|
#if CONFIG_NETWORK
|
|
int ret;
|
|
ff_network_inited_globally = 1;
|
|
if ((ret = ff_network_init()) < 0)
|
|
return ret;
|
|
ff_tls_init();
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int avformat_network_deinit(void)
|
|
{
|
|
#if CONFIG_NETWORK
|
|
ff_network_close();
|
|
ff_tls_deinit();
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int ff_add_param_change(AVPacket *pkt, int32_t channels,
|
|
uint64_t channel_layout, int32_t sample_rate,
|
|
int32_t width, int32_t height)
|
|
{
|
|
uint32_t flags = 0;
|
|
int size = 4;
|
|
uint8_t *data;
|
|
if (!pkt)
|
|
return AVERROR(EINVAL);
|
|
if (channels) {
|
|
size += 4;
|
|
flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
|
|
}
|
|
if (channel_layout) {
|
|
size += 8;
|
|
flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
|
|
}
|
|
if (sample_rate) {
|
|
size += 4;
|
|
flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
|
|
}
|
|
if (width || height) {
|
|
size += 8;
|
|
flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
|
|
}
|
|
data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
|
|
if (!data)
|
|
return AVERROR(ENOMEM);
|
|
bytestream_put_le32(&data, flags);
|
|
if (channels)
|
|
bytestream_put_le32(&data, channels);
|
|
if (channel_layout)
|
|
bytestream_put_le64(&data, channel_layout);
|
|
if (sample_rate)
|
|
bytestream_put_le32(&data, sample_rate);
|
|
if (width || height) {
|
|
bytestream_put_le32(&data, width);
|
|
bytestream_put_le32(&data, height);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int ff_generate_avci_extradata(AVStream *st)
|
|
{
|
|
static const uint8_t avci100_1080p_extradata[] = {
|
|
// SPS
|
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
|
|
0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
|
|
0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
|
|
0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e,
|
|
0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8,
|
|
0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2,
|
|
0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00,
|
|
0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca,
|
|
0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
// PPS
|
|
0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
|
|
0xd0
|
|
};
|
|
static const uint8_t avci100_1080i_extradata[] = {
|
|
// SPS
|
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
|
|
0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63,
|
|
0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19,
|
|
0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65,
|
|
0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26,
|
|
0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50,
|
|
0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e,
|
|
0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28,
|
|
0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0,
|
|
0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03,
|
|
0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x00,
|
|
// PPS
|
|
0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48,
|
|
0xd0
|
|
};
|
|
static const uint8_t avci50_1080i_extradata[] = {
|
|
// SPS
|
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28,
|
|
0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18,
|
|
0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c,
|
|
0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61,
|
|
0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06,
|
|
0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63,
|
|
0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19,
|
|
0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16,
|
|
0x81, 0x13, 0xf7, 0xff, 0x80, 0x01, 0x80, 0x02,
|
|
0x71, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03,
|
|
0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00,
|
|
// PPS
|
|
0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12,
|
|
0x11
|
|
};
|
|
static const uint8_t avci100_720p_extradata[] = {
|
|
// SPS
|
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29,
|
|
0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62,
|
|
0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5,
|
|
0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8,
|
|
0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95,
|
|
0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43,
|
|
0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01,
|
|
0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05,
|
|
0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03,
|
|
0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
// PPS
|
|
0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12,
|
|
0x11
|
|
};
|
|
|
|
const uint8_t *data = NULL;
|
|
int size = 0;
|
|
|
|
if (st->codecpar->width == 1920) {
|
|
if (st->codecpar->field_order == AV_FIELD_PROGRESSIVE) {
|
|
data = avci100_1080p_extradata;
|
|
size = sizeof(avci100_1080p_extradata);
|
|
} else {
|
|
data = avci100_1080i_extradata;
|
|
size = sizeof(avci100_1080i_extradata);
|
|
}
|
|
} else if (st->codecpar->width == 1440) {
|
|
data = avci50_1080i_extradata;
|
|
size = sizeof(avci50_1080i_extradata);
|
|
} else if (st->codecpar->width == 1280) {
|
|
data = avci100_720p_extradata;
|
|
size = sizeof(avci100_720p_extradata);
|
|
}
|
|
|
|
if (!size)
|
|
return 0;
|
|
|
|
av_freep(&st->codecpar->extradata);
|
|
st->codecpar->extradata_size = 0;
|
|
st->codecpar->extradata = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!st->codecpar->extradata)
|
|
return AVERROR(ENOMEM);
|
|
|
|
memcpy(st->codecpar->extradata, data, size);
|
|
st->codecpar->extradata_size = size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
uint8_t *av_stream_get_side_data(AVStream *st, enum AVPacketSideDataType type,
|
|
int *size)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < st->nb_side_data; i++) {
|
|
if (st->side_data[i].type == type) {
|
|
if (size)
|
|
*size = st->side_data[i].size;
|
|
return st->side_data[i].data;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
uint8_t *av_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
|
|
int size)
|
|
{
|
|
AVPacketSideData *sd, *tmp;
|
|
int i;
|
|
uint8_t *data = av_malloc(size);
|
|
|
|
if (!data)
|
|
return NULL;
|
|
|
|
for (i = 0; i < st->nb_side_data; i++) {
|
|
sd = &st->side_data[i];
|
|
|
|
if (sd->type == type) {
|
|
av_freep(&sd->data);
|
|
sd->data = data;
|
|
sd->size = size;
|
|
return sd->data;
|
|
}
|
|
}
|
|
|
|
tmp = av_realloc_array(st->side_data, st->nb_side_data + 1, sizeof(*tmp));
|
|
if (!tmp) {
|
|
av_freep(&data);
|
|
return NULL;
|
|
}
|
|
|
|
st->side_data = tmp;
|
|
st->nb_side_data++;
|
|
|
|
sd = &st->side_data[st->nb_side_data - 1];
|
|
sd->type = type;
|
|
sd->data = data;
|
|
sd->size = size;
|
|
return data;
|
|
}
|
|
|
|
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
|
|
{
|
|
if (*pb)
|
|
s->io_close(s, *pb);
|
|
*pb = NULL;
|
|
}
|