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77c85cbd9d
* commit '46c1917350f58dfab84e41919e6c02d43950db8c': nut: use a define for the nut version bgmc: Do not mark ff_bgmc_decode_init() as av_cold Merged-by: Michael Niedermayer <michaelni@gmx.at>
1024 lines
33 KiB
C
1024 lines
33 KiB
C
/*
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* nut muxer
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* Copyright (c) 2004-2007 Michael Niedermayer
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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/intreadwrite.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/tree.h"
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#include "libavutil/dict.h"
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#include "libavutil/avassert.h"
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#include "libavcodec/mpegaudiodata.h"
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#include "nut.h"
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#include "internal.h"
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#include "avio_internal.h"
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#include "riff.h"
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static int find_expected_header(AVCodecContext *c, int size, int key_frame,
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uint8_t out[64])
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{
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int sample_rate = c->sample_rate;
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if (size > 4096)
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return 0;
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AV_WB24(out, 1);
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if (c->codec_id == AV_CODEC_ID_MPEG4) {
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if (key_frame) {
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return 3;
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} else {
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out[3] = 0xB6;
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return 4;
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}
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} else if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO ||
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c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
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return 3;
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} else if (c->codec_id == AV_CODEC_ID_H264) {
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return 3;
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} else if (c->codec_id == AV_CODEC_ID_MP3 ||
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c->codec_id == AV_CODEC_ID_MP2) {
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int lsf, mpeg25, sample_rate_index, bitrate_index, frame_size;
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int layer = c->codec_id == AV_CODEC_ID_MP3 ? 3 : 2;
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unsigned int header = 0xFFF00000;
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lsf = sample_rate < (24000 + 32000) / 2;
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mpeg25 = sample_rate < (12000 + 16000) / 2;
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sample_rate <<= lsf + mpeg25;
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if (sample_rate < (32000 + 44100) / 2) sample_rate_index = 2;
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else if (sample_rate < (44100 + 48000) / 2) sample_rate_index = 0;
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else sample_rate_index = 1;
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sample_rate = avpriv_mpa_freq_tab[sample_rate_index] >> (lsf + mpeg25);
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for (bitrate_index = 2; bitrate_index < 30; bitrate_index++) {
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frame_size =
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avpriv_mpa_bitrate_tab[lsf][layer - 1][bitrate_index >> 1];
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frame_size = (frame_size * 144000) / (sample_rate << lsf) +
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(bitrate_index & 1);
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if (frame_size == size)
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break;
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}
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header |= (!lsf) << 19;
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header |= (4 - layer) << 17;
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header |= 1 << 16; //no crc
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AV_WB32(out, header);
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if (size <= 0)
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return 2; //we guess there is no crc, if there is one the user clearly does not care about overhead
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if (bitrate_index == 30)
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return -1; //something is wrong ...
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header |= (bitrate_index >> 1) << 12;
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header |= sample_rate_index << 10;
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header |= (bitrate_index & 1) << 9;
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return 2; //FIXME actually put the needed ones in build_elision_headers()
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return 3; //we guess that the private bit is not set
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//FIXME the above assumptions should be checked, if these turn out false too often something should be done
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}
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return 0;
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}
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static int find_header_idx(AVFormatContext *s, AVCodecContext *c, int size, int frame_type)
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{
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NUTContext *nut = s->priv_data;
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uint8_t out[64];
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int i;
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int len = find_expected_header(c, size, frame_type, out);
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for (i = 1; i < nut->header_count; i++) {
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if (len == nut->header_len[i] && !memcmp(out, nut->header[i], len)) {
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return i;
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}
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}
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return 0;
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}
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static void build_elision_headers(AVFormatContext *s)
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{
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NUTContext *nut = s->priv_data;
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int i;
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//FIXME this is lame
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//FIXME write a 2pass mode to find the maximal headers
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static const uint8_t headers[][5] = {
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{ 3, 0x00, 0x00, 0x01 },
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{ 4, 0x00, 0x00, 0x01, 0xB6},
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{ 2, 0xFF, 0xFA }, //mp3+crc
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{ 2, 0xFF, 0xFB }, //mp3
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{ 2, 0xFF, 0xFC }, //mp2+crc
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{ 2, 0xFF, 0xFD }, //mp2
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};
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nut->header_count = 7;
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for (i = 1; i < nut->header_count; i++) {
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nut->header_len[i] = headers[i - 1][0];
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nut->header[i] = &headers[i - 1][1];
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}
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}
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static void build_frame_code(AVFormatContext *s)
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{
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NUTContext *nut = s->priv_data;
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int key_frame, index, pred, stream_id;
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int start = 1;
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int end = 254;
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int keyframe_0_esc = s->nb_streams > 2;
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int pred_table[10];
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FrameCode *ft;
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ft = &nut->frame_code[start];
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ft->flags = FLAG_CODED;
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ft->size_mul = 1;
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ft->pts_delta = 1;
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start++;
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if (keyframe_0_esc) {
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/* keyframe = 0 escape */
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FrameCode *ft = &nut->frame_code[start];
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ft->flags = FLAG_STREAM_ID | FLAG_SIZE_MSB | FLAG_CODED_PTS;
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ft->size_mul = 1;
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start++;
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}
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for (stream_id = 0; stream_id < s->nb_streams; stream_id++) {
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int start2 = start + (end - start) * stream_id / s->nb_streams;
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int end2 = start + (end - start) * (stream_id + 1) / s->nb_streams;
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AVCodecContext *codec = s->streams[stream_id]->codec;
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int is_audio = codec->codec_type == AVMEDIA_TYPE_AUDIO;
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int intra_only = /*codec->intra_only || */ is_audio;
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int pred_count;
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int frame_size = 0;
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if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
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frame_size = av_get_audio_frame_duration(codec, 0);
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if (codec->codec_id == AV_CODEC_ID_VORBIS && !frame_size)
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frame_size = 64;
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} else {
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AVRational f = av_div_q(codec->time_base, *nut->stream[stream_id].time_base);
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if (f.den == 1 && f.num>0)
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frame_size = f.num;
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}
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if (!frame_size)
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frame_size = 1;
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for (key_frame = 0; key_frame < 2; key_frame++) {
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if (!intra_only || !keyframe_0_esc || key_frame != 0) {
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FrameCode *ft = &nut->frame_code[start2];
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ft->flags = FLAG_KEY * key_frame;
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ft->flags |= FLAG_SIZE_MSB | FLAG_CODED_PTS;
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ft->stream_id = stream_id;
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ft->size_mul = 1;
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if (is_audio)
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ft->header_idx = find_header_idx(s, codec, -1, key_frame);
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start2++;
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}
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}
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key_frame = intra_only;
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#if 1
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if (is_audio) {
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int frame_bytes = codec->frame_size * (int64_t)codec->bit_rate /
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(8 * codec->sample_rate);
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int pts;
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for (pts = 0; pts < 2; pts++) {
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for (pred = 0; pred < 2; pred++) {
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FrameCode *ft = &nut->frame_code[start2];
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ft->flags = FLAG_KEY * key_frame;
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ft->stream_id = stream_id;
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ft->size_mul = frame_bytes + 2;
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ft->size_lsb = frame_bytes + pred;
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ft->pts_delta = pts * frame_size;
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ft->header_idx = find_header_idx(s, codec, frame_bytes + pred, key_frame);
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start2++;
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}
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}
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} else {
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FrameCode *ft = &nut->frame_code[start2];
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ft->flags = FLAG_KEY | FLAG_SIZE_MSB;
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ft->stream_id = stream_id;
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ft->size_mul = 1;
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ft->pts_delta = frame_size;
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start2++;
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}
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#endif
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if (codec->has_b_frames) {
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pred_count = 5;
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pred_table[0] = -2;
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pred_table[1] = -1;
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pred_table[2] = 1;
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pred_table[3] = 3;
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pred_table[4] = 4;
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} else if (codec->codec_id == AV_CODEC_ID_VORBIS) {
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pred_count = 3;
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pred_table[0] = 2;
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pred_table[1] = 9;
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pred_table[2] = 16;
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} else {
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pred_count = 1;
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pred_table[0] = 1;
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}
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for (pred = 0; pred < pred_count; pred++) {
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int start3 = start2 + (end2 - start2) * pred / pred_count;
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int end3 = start2 + (end2 - start2) * (pred + 1) / pred_count;
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pred_table[pred] *= frame_size;
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for (index = start3; index < end3; index++) {
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FrameCode *ft = &nut->frame_code[index];
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ft->flags = FLAG_KEY * key_frame;
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ft->flags |= FLAG_SIZE_MSB;
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ft->stream_id = stream_id;
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//FIXME use single byte size and pred from last
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ft->size_mul = end3 - start3;
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ft->size_lsb = index - start3;
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ft->pts_delta = pred_table[pred];
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if (is_audio)
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ft->header_idx = find_header_idx(s, codec, -1, key_frame);
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}
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}
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}
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memmove(&nut->frame_code['N' + 1], &nut->frame_code['N'], sizeof(FrameCode) * (255 - 'N'));
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nut->frame_code[0].flags =
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nut->frame_code[255].flags =
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nut->frame_code['N'].flags = FLAG_INVALID;
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}
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static void put_tt(NUTContext *nut, AVRational *time_base, AVIOContext *bc, uint64_t val)
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{
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val *= nut->time_base_count;
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val += time_base - nut->time_base;
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ff_put_v(bc, val);
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}
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/**
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* Store a string as vb.
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*/
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static void put_str(AVIOContext *bc, const char *string)
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{
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int len = strlen(string);
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ff_put_v(bc, len);
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avio_write(bc, string, len);
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}
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static void put_s(AVIOContext *bc, int64_t val)
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{
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ff_put_v(bc, 2 * FFABS(val) - (val > 0));
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}
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#ifdef TRACE
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static inline void ff_put_v_trace(AVIOContext *bc, uint64_t v, const char *file,
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const char *func, int line)
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{
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av_log(NULL, AV_LOG_DEBUG, "ff_put_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
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ff_put_v(bc, v);
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}
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static inline void put_s_trace(AVIOContext *bc, int64_t v, const char *file, const char *func, int line)
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{
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av_log(NULL, AV_LOG_DEBUG, "put_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
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put_s(bc, v);
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}
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#define ff_put_v(bc, v) ff_put_v_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
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#define put_s(bc, v) put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
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#endif
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//FIXME remove calculate_checksum
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static void put_packet(NUTContext *nut, AVIOContext *bc, AVIOContext *dyn_bc,
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int calculate_checksum, uint64_t startcode)
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{
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uint8_t *dyn_buf = NULL;
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int dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
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int forw_ptr = dyn_size + 4 * calculate_checksum;
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if (forw_ptr > 4096)
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ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
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avio_wb64(bc, startcode);
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ff_put_v(bc, forw_ptr);
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if (forw_ptr > 4096)
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avio_wl32(bc, ffio_get_checksum(bc));
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if (calculate_checksum)
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ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
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avio_write(bc, dyn_buf, dyn_size);
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if (calculate_checksum)
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avio_wl32(bc, ffio_get_checksum(bc));
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av_free(dyn_buf);
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}
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static void write_mainheader(NUTContext *nut, AVIOContext *bc)
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{
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int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields,
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tmp_head_idx;
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int64_t tmp_match;
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ff_put_v(bc, NUT_VERSION);
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ff_put_v(bc, nut->avf->nb_streams);
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ff_put_v(bc, nut->max_distance);
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ff_put_v(bc, nut->time_base_count);
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for (i = 0; i < nut->time_base_count; i++) {
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ff_put_v(bc, nut->time_base[i].num);
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ff_put_v(bc, nut->time_base[i].den);
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}
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tmp_pts = 0;
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tmp_mul = 1;
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tmp_stream = 0;
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tmp_match = 1 - (1LL << 62);
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tmp_head_idx = 0;
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for (i = 0; i < 256; ) {
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tmp_fields = 0;
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tmp_size = 0;
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// tmp_res=0;
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if (tmp_pts != nut->frame_code[i].pts_delta ) tmp_fields = 1;
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if (tmp_mul != nut->frame_code[i].size_mul ) tmp_fields = 2;
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if (tmp_stream != nut->frame_code[i].stream_id ) tmp_fields = 3;
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if (tmp_size != nut->frame_code[i].size_lsb ) tmp_fields = 4;
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// if (tmp_res != nut->frame_code[i].res ) tmp_fields=5;
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if (tmp_head_idx != nut->frame_code[i].header_idx) tmp_fields = 8;
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tmp_pts = nut->frame_code[i].pts_delta;
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tmp_flags = nut->frame_code[i].flags;
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tmp_stream = nut->frame_code[i].stream_id;
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tmp_mul = nut->frame_code[i].size_mul;
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tmp_size = nut->frame_code[i].size_lsb;
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// tmp_res = nut->frame_code[i].res;
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tmp_head_idx = nut->frame_code[i].header_idx;
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for (j = 0; i < 256; j++, i++) {
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if (i == 'N') {
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j--;
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continue;
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}
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if (nut->frame_code[i].pts_delta != tmp_pts ||
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nut->frame_code[i].flags != tmp_flags ||
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nut->frame_code[i].stream_id != tmp_stream ||
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nut->frame_code[i].size_mul != tmp_mul ||
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nut->frame_code[i].size_lsb != tmp_size + j ||
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// nut->frame_code[i].res != tmp_res ||
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nut->frame_code[i].header_idx != tmp_head_idx)
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break;
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}
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if (j != tmp_mul - tmp_size)
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tmp_fields = 6;
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ff_put_v(bc, tmp_flags);
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ff_put_v(bc, tmp_fields);
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if (tmp_fields > 0) put_s(bc, tmp_pts);
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if (tmp_fields > 1) ff_put_v(bc, tmp_mul);
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if (tmp_fields > 2) ff_put_v(bc, tmp_stream);
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if (tmp_fields > 3) ff_put_v(bc, tmp_size);
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if (tmp_fields > 4) ff_put_v(bc, 0 /*tmp_res*/);
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if (tmp_fields > 5) ff_put_v(bc, j);
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if (tmp_fields > 6) ff_put_v(bc, tmp_match);
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if (tmp_fields > 7) ff_put_v(bc, tmp_head_idx);
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}
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ff_put_v(bc, nut->header_count - 1);
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for (i = 1; i < nut->header_count; i++) {
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ff_put_v(bc, nut->header_len[i]);
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avio_write(bc, nut->header[i], nut->header_len[i]);
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}
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}
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static int write_streamheader(AVFormatContext *avctx, AVIOContext *bc,
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AVStream *st, int i)
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{
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NUTContext *nut = avctx->priv_data;
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AVCodecContext *codec = st->codec;
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ff_put_v(bc, i);
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switch (codec->codec_type) {
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case AVMEDIA_TYPE_VIDEO: ff_put_v(bc, 0); break;
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case AVMEDIA_TYPE_AUDIO: ff_put_v(bc, 1); break;
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case AVMEDIA_TYPE_SUBTITLE: ff_put_v(bc, 2); break;
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default: ff_put_v(bc, 3); break;
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}
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ff_put_v(bc, 4);
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if (codec->codec_tag) {
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avio_wl32(bc, codec->codec_tag);
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} else {
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av_log(avctx, AV_LOG_ERROR, "No codec tag defined for stream %d\n", i);
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return AVERROR(EINVAL);
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}
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ff_put_v(bc, nut->stream[i].time_base - nut->time_base);
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ff_put_v(bc, nut->stream[i].msb_pts_shift);
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ff_put_v(bc, nut->stream[i].max_pts_distance);
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ff_put_v(bc, codec->has_b_frames);
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avio_w8(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
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ff_put_v(bc, codec->extradata_size);
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avio_write(bc, codec->extradata, codec->extradata_size);
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switch (codec->codec_type) {
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case AVMEDIA_TYPE_AUDIO:
|
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ff_put_v(bc, codec->sample_rate);
|
|
ff_put_v(bc, 1);
|
|
ff_put_v(bc, codec->channels);
|
|
break;
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
ff_put_v(bc, codec->width);
|
|
ff_put_v(bc, codec->height);
|
|
|
|
if (st->sample_aspect_ratio.num <= 0 ||
|
|
st->sample_aspect_ratio.den <= 0) {
|
|
ff_put_v(bc, 0);
|
|
ff_put_v(bc, 0);
|
|
} else {
|
|
ff_put_v(bc, st->sample_aspect_ratio.num);
|
|
ff_put_v(bc, st->sample_aspect_ratio.den);
|
|
}
|
|
ff_put_v(bc, 0); /* csp type -- unknown */
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int add_info(AVIOContext *bc, const char *type, const char *value)
|
|
{
|
|
put_str(bc, type);
|
|
put_s(bc, -1);
|
|
put_str(bc, value);
|
|
return 1;
|
|
}
|
|
|
|
static int write_globalinfo(NUTContext *nut, AVIOContext *bc)
|
|
{
|
|
AVFormatContext *s = nut->avf;
|
|
AVDictionaryEntry *t = NULL;
|
|
AVIOContext *dyn_bc;
|
|
uint8_t *dyn_buf = NULL;
|
|
int count = 0, dyn_size;
|
|
int ret = avio_open_dyn_buf(&dyn_bc);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
|
|
count += add_info(dyn_bc, t->key, t->value);
|
|
|
|
ff_put_v(bc, 0); //stream_if_plus1
|
|
ff_put_v(bc, 0); //chapter_id
|
|
ff_put_v(bc, 0); //timestamp_start
|
|
ff_put_v(bc, 0); //length
|
|
|
|
ff_put_v(bc, count);
|
|
|
|
dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
|
|
avio_write(bc, dyn_buf, dyn_size);
|
|
av_free(dyn_buf);
|
|
return 0;
|
|
}
|
|
|
|
static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id) {
|
|
AVFormatContext *s= nut->avf;
|
|
AVStream* st = s->streams[stream_id];
|
|
AVDictionaryEntry *t = NULL;
|
|
AVIOContext *dyn_bc;
|
|
uint8_t *dyn_buf=NULL;
|
|
int count=0, dyn_size, i;
|
|
int ret = avio_open_dyn_buf(&dyn_bc);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
while ((t = av_dict_get(st->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
|
|
count += add_info(dyn_bc, t->key, t->value);
|
|
for (i=0; ff_nut_dispositions[i].flag; ++i) {
|
|
if (st->disposition & ff_nut_dispositions[i].flag)
|
|
count += add_info(dyn_bc, "Disposition", ff_nut_dispositions[i].str);
|
|
}
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
|
uint8_t buf[256];
|
|
snprintf(buf, sizeof(buf), "%d/%d", st->codec->time_base.den, st->codec->time_base.num);
|
|
count += add_info(dyn_bc, "r_frame_rate", buf);
|
|
}
|
|
dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
|
|
|
|
if (count) {
|
|
ff_put_v(bc, stream_id + 1); //stream_id_plus1
|
|
ff_put_v(bc, 0); //chapter_id
|
|
ff_put_v(bc, 0); //timestamp_start
|
|
ff_put_v(bc, 0); //length
|
|
|
|
ff_put_v(bc, count);
|
|
|
|
avio_write(bc, dyn_buf, dyn_size);
|
|
}
|
|
|
|
av_free(dyn_buf);
|
|
return count;
|
|
}
|
|
|
|
static int write_chapter(NUTContext *nut, AVIOContext *bc, int id)
|
|
{
|
|
AVIOContext *dyn_bc;
|
|
uint8_t *dyn_buf = NULL;
|
|
AVDictionaryEntry *t = NULL;
|
|
AVChapter *ch = nut->avf->chapters[id];
|
|
int ret, dyn_size, count = 0;
|
|
|
|
ret = avio_open_dyn_buf(&dyn_bc);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ff_put_v(bc, 0); // stream_id_plus1
|
|
put_s(bc, id + 1); // chapter_id
|
|
put_tt(nut, nut->chapter[id].time_base, bc, ch->start); // chapter_start
|
|
ff_put_v(bc, ch->end - ch->start); // chapter_len
|
|
|
|
while ((t = av_dict_get(ch->metadata, "", t, AV_DICT_IGNORE_SUFFIX)))
|
|
count += add_info(dyn_bc, t->key, t->value);
|
|
|
|
ff_put_v(bc, count);
|
|
|
|
dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
|
|
avio_write(bc, dyn_buf, dyn_size);
|
|
av_freep(&dyn_buf);
|
|
return 0;
|
|
}
|
|
|
|
static int write_index(NUTContext *nut, AVIOContext *bc) {
|
|
int i;
|
|
Syncpoint dummy= { .pos= 0 };
|
|
Syncpoint *next_node[2] = { NULL };
|
|
int64_t startpos = avio_tell(bc);
|
|
int64_t payload_size;
|
|
|
|
put_tt(nut, nut->max_pts_tb, bc, nut->max_pts);
|
|
|
|
ff_put_v(bc, nut->sp_count);
|
|
|
|
for (i=0; i<nut->sp_count; i++) {
|
|
av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pos_cmp, (void**)next_node);
|
|
ff_put_v(bc, (next_node[1]->pos >> 4) - (dummy.pos>>4));
|
|
dummy.pos = next_node[1]->pos;
|
|
}
|
|
|
|
for (i=0; i<nut->avf->nb_streams; i++) {
|
|
StreamContext *nus= &nut->stream[i];
|
|
int64_t last_pts= -1;
|
|
int j, k;
|
|
for (j=0; j<nut->sp_count; j++) {
|
|
int flag = (nus->keyframe_pts[j] != AV_NOPTS_VALUE) ^ (j+1 == nut->sp_count);
|
|
int n = 0;
|
|
for (; j<nut->sp_count && (nus->keyframe_pts[j] != AV_NOPTS_VALUE) == flag; j++)
|
|
n++;
|
|
|
|
ff_put_v(bc, 1 + 2*flag + 4*n);
|
|
for (k= j - n; k<=j && k<nut->sp_count; k++) {
|
|
if (nus->keyframe_pts[k] == AV_NOPTS_VALUE)
|
|
continue;
|
|
av_assert0(nus->keyframe_pts[k] > last_pts);
|
|
ff_put_v(bc, nus->keyframe_pts[k] - last_pts);
|
|
last_pts = nus->keyframe_pts[k];
|
|
}
|
|
}
|
|
}
|
|
|
|
payload_size = avio_tell(bc) - startpos + 8 + 4;
|
|
|
|
avio_wb64(bc, 8 + payload_size + av_log2(payload_size) / 7 + 1 + 4*(payload_size > 4096));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int write_headers(AVFormatContext *avctx, AVIOContext *bc)
|
|
{
|
|
NUTContext *nut = avctx->priv_data;
|
|
AVIOContext *dyn_bc;
|
|
int i, ret;
|
|
|
|
ff_metadata_conv_ctx(avctx, ff_nut_metadata_conv, NULL);
|
|
|
|
ret = avio_open_dyn_buf(&dyn_bc);
|
|
if (ret < 0)
|
|
return ret;
|
|
write_mainheader(nut, dyn_bc);
|
|
put_packet(nut, bc, dyn_bc, 1, MAIN_STARTCODE);
|
|
|
|
for (i = 0; i < nut->avf->nb_streams; i++) {
|
|
ret = avio_open_dyn_buf(&dyn_bc);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = write_streamheader(avctx, dyn_bc, nut->avf->streams[i], i);
|
|
if (ret < 0)
|
|
return ret;
|
|
put_packet(nut, bc, dyn_bc, 1, STREAM_STARTCODE);
|
|
}
|
|
|
|
ret = avio_open_dyn_buf(&dyn_bc);
|
|
if (ret < 0)
|
|
return ret;
|
|
write_globalinfo(nut, dyn_bc);
|
|
put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
|
|
|
|
for (i = 0; i < nut->avf->nb_streams; i++) {
|
|
ret = avio_open_dyn_buf(&dyn_bc);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = write_streaminfo(nut, dyn_bc, i);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret > 0)
|
|
put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
|
|
else {
|
|
uint8_t *buf;
|
|
avio_close_dyn_buf(dyn_bc, &buf);
|
|
av_free(buf);
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < nut->avf->nb_chapters; i++) {
|
|
ret = avio_open_dyn_buf(&dyn_bc);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = write_chapter(nut, dyn_bc, i);
|
|
if (ret < 0) {
|
|
uint8_t *buf;
|
|
avio_close_dyn_buf(dyn_bc, &buf);
|
|
av_freep(&buf);
|
|
return ret;
|
|
}
|
|
put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE);
|
|
}
|
|
|
|
nut->last_syncpoint_pos = INT_MIN;
|
|
nut->header_count++;
|
|
return 0;
|
|
}
|
|
|
|
static int nut_write_header(AVFormatContext *s)
|
|
{
|
|
NUTContext *nut = s->priv_data;
|
|
AVIOContext *bc = s->pb;
|
|
int i, j, ret;
|
|
|
|
nut->avf = s;
|
|
|
|
nut->stream = av_mallocz(sizeof(StreamContext ) * s->nb_streams);
|
|
nut->chapter = av_mallocz(sizeof(ChapterContext) * s->nb_chapters);
|
|
nut->time_base= av_mallocz(sizeof(AVRational ) *(s->nb_streams +
|
|
s->nb_chapters));
|
|
if (!nut->stream || !nut->chapter || !nut->time_base) {
|
|
av_freep(&nut->stream);
|
|
av_freep(&nut->chapter);
|
|
av_freep(&nut->time_base);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
int ssize;
|
|
AVRational time_base;
|
|
ff_parse_specific_params(st->codec, &time_base.den, &ssize, &time_base.num);
|
|
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->sample_rate) {
|
|
time_base = (AVRational) {1, st->codec->sample_rate};
|
|
} else {
|
|
time_base = ff_choose_timebase(s, st, 48000);
|
|
}
|
|
|
|
avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
|
|
|
|
for (j = 0; j < nut->time_base_count; j++)
|
|
if (!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))) {
|
|
break;
|
|
}
|
|
nut->time_base[j] = time_base;
|
|
nut->stream[i].time_base = &nut->time_base[j];
|
|
if (j == nut->time_base_count)
|
|
nut->time_base_count++;
|
|
|
|
if (INT64_C(1000) * time_base.num >= time_base.den)
|
|
nut->stream[i].msb_pts_shift = 7;
|
|
else
|
|
nut->stream[i].msb_pts_shift = 14;
|
|
nut->stream[i].max_pts_distance =
|
|
FFMAX(time_base.den, time_base.num) / time_base.num;
|
|
}
|
|
|
|
for (i = 0; i < s->nb_chapters; i++) {
|
|
AVChapter *ch = s->chapters[i];
|
|
|
|
for (j = 0; j < nut->time_base_count; j++)
|
|
if (!memcmp(&ch->time_base, &nut->time_base[j], sizeof(AVRational)))
|
|
break;
|
|
|
|
nut->time_base[j] = ch->time_base;
|
|
nut->chapter[i].time_base = &nut->time_base[j];
|
|
if (j == nut->time_base_count)
|
|
nut->time_base_count++;
|
|
}
|
|
|
|
nut->max_distance = MAX_DISTANCE;
|
|
build_elision_headers(s);
|
|
build_frame_code(s);
|
|
av_assert0(nut->frame_code['N'].flags == FLAG_INVALID);
|
|
|
|
avio_write(bc, ID_STRING, strlen(ID_STRING));
|
|
avio_w8(bc, 0);
|
|
|
|
if ((ret = write_headers(s, bc)) < 0)
|
|
return ret;
|
|
|
|
if (s->avoid_negative_ts < 0)
|
|
s->avoid_negative_ts = 1;
|
|
|
|
avio_flush(bc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc,
|
|
AVPacket *pkt)
|
|
{
|
|
int flags = 0;
|
|
|
|
if (pkt->flags & AV_PKT_FLAG_KEY)
|
|
flags |= FLAG_KEY;
|
|
if (pkt->stream_index != fc->stream_id)
|
|
flags |= FLAG_STREAM_ID;
|
|
if (pkt->size / fc->size_mul)
|
|
flags |= FLAG_SIZE_MSB;
|
|
if (pkt->pts - nus->last_pts != fc->pts_delta)
|
|
flags |= FLAG_CODED_PTS;
|
|
if (pkt->size > 2 * nut->max_distance)
|
|
flags |= FLAG_CHECKSUM;
|
|
if (FFABS(pkt->pts - nus->last_pts) > nus->max_pts_distance)
|
|
flags |= FLAG_CHECKSUM;
|
|
if (pkt->size < nut->header_len[fc->header_idx] ||
|
|
(pkt->size > 4096 && fc->header_idx) ||
|
|
memcmp(pkt->data, nut->header[fc->header_idx],
|
|
nut->header_len[fc->header_idx]))
|
|
flags |= FLAG_HEADER_IDX;
|
|
|
|
return flags | (fc->flags & FLAG_CODED);
|
|
}
|
|
|
|
static int find_best_header_idx(NUTContext *nut, AVPacket *pkt)
|
|
{
|
|
int i;
|
|
int best_i = 0;
|
|
int best_len = 0;
|
|
|
|
if (pkt->size > 4096)
|
|
return 0;
|
|
|
|
for (i = 1; i < nut->header_count; i++)
|
|
if (pkt->size >= nut->header_len[i]
|
|
&& nut->header_len[i] > best_len
|
|
&& !memcmp(pkt->data, nut->header[i], nut->header_len[i])) {
|
|
best_i = i;
|
|
best_len = nut->header_len[i];
|
|
}
|
|
return best_i;
|
|
}
|
|
|
|
static int nut_write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
NUTContext *nut = s->priv_data;
|
|
StreamContext *nus = &nut->stream[pkt->stream_index];
|
|
AVIOContext *bc = s->pb, *dyn_bc;
|
|
FrameCode *fc;
|
|
int64_t coded_pts;
|
|
int best_length, frame_code, flags, needed_flags, i, header_idx;
|
|
int best_header_idx;
|
|
int key_frame = !!(pkt->flags & AV_PKT_FLAG_KEY);
|
|
int store_sp = 0;
|
|
int ret;
|
|
|
|
if (pkt->pts < 0) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Negative pts not supported stream %d, pts %"PRId64"\n",
|
|
pkt->stream_index, pkt->pts);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if (1LL << (20 + 3 * nut->header_count) <= avio_tell(bc))
|
|
write_headers(s, bc);
|
|
|
|
if (key_frame && !(nus->last_flags & FLAG_KEY))
|
|
store_sp = 1;
|
|
|
|
if (pkt->size + 30 /*FIXME check*/ + avio_tell(bc) >= nut->last_syncpoint_pos + nut->max_distance)
|
|
store_sp = 1;
|
|
|
|
//FIXME: Ensure store_sp is 1 in the first place.
|
|
|
|
if (store_sp) {
|
|
Syncpoint *sp, dummy = { .pos = INT64_MAX };
|
|
|
|
ff_nut_reset_ts(nut, *nus->time_base, pkt->dts);
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
AVStream *st = s->streams[i];
|
|
int64_t dts_tb = av_rescale_rnd(pkt->dts,
|
|
nus->time_base->num * (int64_t)nut->stream[i].time_base->den,
|
|
nus->time_base->den * (int64_t)nut->stream[i].time_base->num,
|
|
AV_ROUND_DOWN);
|
|
int index = av_index_search_timestamp(st, dts_tb,
|
|
AVSEEK_FLAG_BACKWARD);
|
|
if (index >= 0)
|
|
dummy.pos = FFMIN(dummy.pos, st->index_entries[index].pos);
|
|
}
|
|
if (dummy.pos == INT64_MAX)
|
|
dummy.pos = 0;
|
|
sp = av_tree_find(nut->syncpoints, &dummy, (void *)ff_nut_sp_pos_cmp,
|
|
NULL);
|
|
|
|
nut->last_syncpoint_pos = avio_tell(bc);
|
|
ret = avio_open_dyn_buf(&dyn_bc);
|
|
if (ret < 0)
|
|
return ret;
|
|
put_tt(nut, nus->time_base, dyn_bc, pkt->dts);
|
|
ff_put_v(dyn_bc, sp ? (nut->last_syncpoint_pos - sp->pos) >> 4 : 0);
|
|
put_packet(nut, bc, dyn_bc, 1, SYNCPOINT_STARTCODE);
|
|
|
|
ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0 /*unused*/, pkt->dts);
|
|
|
|
if ((1ll<<60) % nut->sp_count == 0)
|
|
for (i=0; i<s->nb_streams; i++) {
|
|
int j;
|
|
StreamContext *nus = &nut->stream[i];
|
|
nus->keyframe_pts = av_realloc(nus->keyframe_pts, 2*nut->sp_count*sizeof(*nus->keyframe_pts));
|
|
if (!nus->keyframe_pts)
|
|
return AVERROR(ENOMEM);
|
|
for (j=nut->sp_count == 1 ? 0 : nut->sp_count; j<2*nut->sp_count; j++)
|
|
nus->keyframe_pts[j] = AV_NOPTS_VALUE;
|
|
}
|
|
}
|
|
av_assert0(nus->last_pts != AV_NOPTS_VALUE);
|
|
|
|
coded_pts = pkt->pts & ((1 << nus->msb_pts_shift) - 1);
|
|
if (ff_lsb2full(nus, coded_pts) != pkt->pts)
|
|
coded_pts = pkt->pts + (1 << nus->msb_pts_shift);
|
|
|
|
best_header_idx = find_best_header_idx(nut, pkt);
|
|
|
|
best_length = INT_MAX;
|
|
frame_code = -1;
|
|
for (i = 0; i < 256; i++) {
|
|
int length = 0;
|
|
FrameCode *fc = &nut->frame_code[i];
|
|
int flags = fc->flags;
|
|
|
|
if (flags & FLAG_INVALID)
|
|
continue;
|
|
needed_flags = get_needed_flags(nut, nus, fc, pkt);
|
|
|
|
if (flags & FLAG_CODED) {
|
|
length++;
|
|
flags = needed_flags;
|
|
}
|
|
|
|
if ((flags & needed_flags) != needed_flags)
|
|
continue;
|
|
|
|
if ((flags ^ needed_flags) & FLAG_KEY)
|
|
continue;
|
|
|
|
if (flags & FLAG_STREAM_ID)
|
|
length += ff_get_v_length(pkt->stream_index);
|
|
|
|
if (pkt->size % fc->size_mul != fc->size_lsb)
|
|
continue;
|
|
if (flags & FLAG_SIZE_MSB)
|
|
length += ff_get_v_length(pkt->size / fc->size_mul);
|
|
|
|
if (flags & FLAG_CHECKSUM)
|
|
length += 4;
|
|
|
|
if (flags & FLAG_CODED_PTS)
|
|
length += ff_get_v_length(coded_pts);
|
|
|
|
if ( (flags & FLAG_CODED)
|
|
&& nut->header_len[best_header_idx] > nut->header_len[fc->header_idx] + 1) {
|
|
flags |= FLAG_HEADER_IDX;
|
|
}
|
|
|
|
if (flags & FLAG_HEADER_IDX) {
|
|
length += 1 - nut->header_len[best_header_idx];
|
|
} else {
|
|
length -= nut->header_len[fc->header_idx];
|
|
}
|
|
|
|
length *= 4;
|
|
length += !(flags & FLAG_CODED_PTS);
|
|
length += !(flags & FLAG_CHECKSUM);
|
|
|
|
if (length < best_length) {
|
|
best_length = length;
|
|
frame_code = i;
|
|
}
|
|
}
|
|
av_assert0(frame_code != -1);
|
|
fc = &nut->frame_code[frame_code];
|
|
flags = fc->flags;
|
|
needed_flags = get_needed_flags(nut, nus, fc, pkt);
|
|
header_idx = fc->header_idx;
|
|
|
|
ffio_init_checksum(bc, ff_crc04C11DB7_update, 0);
|
|
avio_w8(bc, frame_code);
|
|
if (flags & FLAG_CODED) {
|
|
ff_put_v(bc, (flags ^ needed_flags) & ~(FLAG_CODED));
|
|
flags = needed_flags;
|
|
}
|
|
if (flags & FLAG_STREAM_ID) ff_put_v(bc, pkt->stream_index);
|
|
if (flags & FLAG_CODED_PTS) ff_put_v(bc, coded_pts);
|
|
if (flags & FLAG_SIZE_MSB ) ff_put_v(bc, pkt->size / fc->size_mul);
|
|
if (flags & FLAG_HEADER_IDX) ff_put_v(bc, header_idx = best_header_idx);
|
|
|
|
if (flags & FLAG_CHECKSUM) avio_wl32(bc, ffio_get_checksum(bc));
|
|
else ffio_get_checksum(bc);
|
|
|
|
avio_write(bc, pkt->data + nut->header_len[header_idx], pkt->size - nut->header_len[header_idx]);
|
|
nus->last_flags = flags;
|
|
nus->last_pts = pkt->pts;
|
|
|
|
//FIXME just store one per syncpoint
|
|
if (flags & FLAG_KEY) {
|
|
av_add_index_entry(
|
|
s->streams[pkt->stream_index],
|
|
nut->last_syncpoint_pos,
|
|
pkt->pts,
|
|
0,
|
|
0,
|
|
AVINDEX_KEYFRAME);
|
|
if (nus->keyframe_pts && nus->keyframe_pts[nut->sp_count] == AV_NOPTS_VALUE)
|
|
nus->keyframe_pts[nut->sp_count] = pkt->pts;
|
|
}
|
|
|
|
if (!nut->max_pts_tb || av_compare_ts(nut->max_pts, *nut->max_pts_tb, pkt->pts, *nus->time_base) < 0) {
|
|
nut->max_pts = pkt->pts;
|
|
nut->max_pts_tb = nus->time_base;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nut_write_trailer(AVFormatContext *s)
|
|
{
|
|
NUTContext *nut = s->priv_data;
|
|
AVIOContext *bc = s->pb, *dyn_bc;
|
|
int i, ret;
|
|
|
|
while (nut->header_count < 3)
|
|
write_headers(s, bc);
|
|
|
|
ret = avio_open_dyn_buf(&dyn_bc);
|
|
if (ret >= 0 && nut->sp_count) {
|
|
write_index(nut, dyn_bc);
|
|
put_packet(nut, bc, dyn_bc, 1, INDEX_STARTCODE);
|
|
}
|
|
|
|
ff_nut_free_sp(nut);
|
|
for (i=0; i<s->nb_streams; i++)
|
|
av_freep(&nut->stream[i].keyframe_pts);
|
|
|
|
av_freep(&nut->stream);
|
|
av_freep(&nut->chapter);
|
|
av_freep(&nut->time_base);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat ff_nut_muxer = {
|
|
.name = "nut",
|
|
.long_name = NULL_IF_CONFIG_SMALL("NUT"),
|
|
.mime_type = "video/x-nut",
|
|
.extensions = "nut",
|
|
.priv_data_size = sizeof(NUTContext),
|
|
.audio_codec = CONFIG_LIBVORBIS ? AV_CODEC_ID_VORBIS :
|
|
CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2,
|
|
.video_codec = AV_CODEC_ID_MPEG4,
|
|
.write_header = nut_write_header,
|
|
.write_packet = nut_write_packet,
|
|
.write_trailer = nut_write_trailer,
|
|
.flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
|
|
.codec_tag = ff_nut_codec_tags,
|
|
};
|