mirror of
https://github.com/FFmpeg/FFmpeg.git
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59c9dc82f4
This commit does for AVOutputFormat what commit
20f9727018
did for AVCodec:
It adds a new type FFOutputFormat, moves all the internals
of AVOutputFormat to it and adds a now reduced AVOutputFormat
as first member.
This does not affect/improve extensibility of both public
or private fields for muxers (it is still a mess due to lavd).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
151 lines
4.7 KiB
C
151 lines
4.7 KiB
C
/*
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* Various muxing utility functions
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#include "libavutil/dict.h"
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#include "libavutil/dict_internal.h"
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#include "libavutil/internal.h"
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#include "libavutil/log.h"
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#include "libavutil/mem.h"
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#include "libavutil/parseutils.h"
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#include "avformat.h"
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#include "avio.h"
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#include "internal.h"
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#include "mux.h"
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#if FF_API_GET_END_PTS
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int64_t av_stream_get_end_pts(const AVStream *st)
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{
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if (cffstream(st)->priv_pts) {
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return cffstream(st)->priv_pts->val;
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} else
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return AV_NOPTS_VALUE;
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}
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#endif
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int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id,
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int std_compliance)
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{
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if (ofmt) {
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unsigned int codec_tag;
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if (ffofmt(ofmt)->query_codec)
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return ffofmt(ofmt)->query_codec(codec_id, std_compliance);
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else if (ofmt->codec_tag)
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return !!av_codec_get_tag2(ofmt->codec_tag, codec_id, &codec_tag);
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else if (codec_id == ofmt->video_codec ||
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codec_id == ofmt->audio_codec ||
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codec_id == ofmt->subtitle_codec)
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return 1;
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}
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return AVERROR_PATCHWELCOME;
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}
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int ff_format_shift_data(AVFormatContext *s, int64_t read_start, int shift_size)
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{
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int ret;
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int64_t pos, pos_end;
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uint8_t *buf, *read_buf[2];
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int read_buf_id = 0;
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int read_size[2];
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AVIOContext *read_pb;
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buf = av_malloc_array(shift_size, 2);
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if (!buf)
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return AVERROR(ENOMEM);
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read_buf[0] = buf;
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read_buf[1] = buf + shift_size;
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/* Shift the data: the AVIO context of the output can only be used for
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* writing, so we re-open the same output, but for reading. It also avoids
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* a read/seek/write/seek back and forth. */
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avio_flush(s->pb);
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ret = s->io_open(s, &read_pb, s->url, AVIO_FLAG_READ, NULL);
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if (ret < 0) {
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av_log(s, AV_LOG_ERROR, "Unable to re-open %s output file for shifting data\n", s->url);
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goto end;
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}
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/* mark the end of the shift to up to the last data we wrote, and get ready
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* for writing */
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pos_end = avio_tell(s->pb);
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avio_seek(s->pb, read_start + shift_size, SEEK_SET);
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avio_seek(read_pb, read_start, SEEK_SET);
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pos = avio_tell(read_pb);
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#define READ_BLOCK do { \
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read_size[read_buf_id] = avio_read(read_pb, read_buf[read_buf_id], shift_size); \
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read_buf_id ^= 1; \
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} while (0)
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/* shift data by chunk of at most shift_size */
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READ_BLOCK;
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do {
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int n;
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READ_BLOCK;
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n = read_size[read_buf_id];
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if (n <= 0)
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break;
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avio_write(s->pb, read_buf[read_buf_id], n);
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pos += n;
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} while (pos < pos_end);
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ret = ff_format_io_close(s, &read_pb);
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end:
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av_free(buf);
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return ret;
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}
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int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
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{
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if (!s->oformat)
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return AVERROR(EINVAL);
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if (!(s->oformat->flags & AVFMT_NOFILE))
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return s->io_open(s, &s->pb, url, AVIO_FLAG_WRITE, options);
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return 0;
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}
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int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds)
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{
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AVDictionaryEntry *entry;
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int64_t parsed_timestamp;
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int ret;
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if ((entry = av_dict_get(s->metadata, "creation_time", NULL, 0))) {
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if ((ret = av_parse_time(&parsed_timestamp, entry->value, 0)) >= 0) {
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*timestamp = return_seconds ? parsed_timestamp / 1000000 : parsed_timestamp;
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return 1;
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} else {
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av_log(s, AV_LOG_WARNING, "Failed to parse creation_time %s\n", entry->value);
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return ret;
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}
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}
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return 0;
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}
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int ff_standardize_creation_time(AVFormatContext *s)
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{
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int64_t timestamp;
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int ret = ff_parse_creation_time_metadata(s, ×tamp, 0);
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if (ret == 1)
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return avpriv_dict_set_timestamp(&s->metadata, "creation_time", timestamp);
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return ret;
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}
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