0,0 → 1,871 |
/* |
* muxing functions for use within FFmpeg |
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
#include "avformat.h" |
#include "avio_internal.h" |
#include "internal.h" |
#include "libavcodec/internal.h" |
#include "libavcodec/bytestream.h" |
#include "libavutil/opt.h" |
#include "libavutil/dict.h" |
#include "libavutil/pixdesc.h" |
#include "libavutil/timestamp.h" |
#include "metadata.h" |
#include "id3v2.h" |
#include "libavutil/avassert.h" |
#include "libavutil/avstring.h" |
#include "libavutil/internal.h" |
#include "libavutil/mathematics.h" |
#include "libavutil/parseutils.h" |
#include "libavutil/time.h" |
#include "riff.h" |
#include "audiointerleave.h" |
#include "url.h" |
#include <stdarg.h> |
#if CONFIG_NETWORK |
#include "network.h" |
#endif |
|
#undef NDEBUG |
#include <assert.h> |
|
/** |
* @file |
* muxing functions for use within libavformat |
*/ |
|
/* fraction handling */ |
|
/** |
* f = val + (num / den) + 0.5. |
* |
* 'num' is normalized so that it is such as 0 <= num < den. |
* |
* @param f fractional number |
* @param val integer value |
* @param num must be >= 0 |
* @param den must be >= 1 |
*/ |
static void frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den) |
{ |
num += (den >> 1); |
if (num >= den) { |
val += num / den; |
num = num % den; |
} |
f->val = val; |
f->num = num; |
f->den = den; |
} |
|
/** |
* Fractional addition to f: f = f + (incr / f->den). |
* |
* @param f fractional number |
* @param incr increment, can be positive or negative |
*/ |
static void frac_add(AVFrac *f, int64_t incr) |
{ |
int64_t num, den; |
|
num = f->num + incr; |
den = f->den; |
if (num < 0) { |
f->val += num / den; |
num = num % den; |
if (num < 0) { |
num += den; |
f->val--; |
} |
} else if (num >= den) { |
f->val += num / den; |
num = num % den; |
} |
f->num = num; |
} |
|
AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precission) |
{ |
AVRational q; |
int j; |
|
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
q = (AVRational){1, st->codec->sample_rate}; |
} else { |
q = st->codec->time_base; |
} |
for (j=2; j<14; j+= 1+(j>2)) |
while (q.den / q.num < min_precission && q.num % j == 0) |
q.num /= j; |
while (q.den / q.num < min_precission && q.den < (1<<24)) |
q.den <<= 1; |
|
return q; |
} |
|
int avformat_alloc_output_context2(AVFormatContext **avctx, AVOutputFormat *oformat, |
const char *format, const char *filename) |
{ |
AVFormatContext *s = avformat_alloc_context(); |
int ret = 0; |
|
*avctx = NULL; |
if (!s) |
goto nomem; |
|
if (!oformat) { |
if (format) { |
oformat = av_guess_format(format, NULL, NULL); |
if (!oformat) { |
av_log(s, AV_LOG_ERROR, "Requested output format '%s' is not a suitable output format\n", format); |
ret = AVERROR(EINVAL); |
goto error; |
} |
} else { |
oformat = av_guess_format(NULL, filename, NULL); |
if (!oformat) { |
ret = AVERROR(EINVAL); |
av_log(s, AV_LOG_ERROR, "Unable to find a suitable output format for '%s'\n", |
filename); |
goto error; |
} |
} |
} |
|
s->oformat = oformat; |
if (s->oformat->priv_data_size > 0) { |
s->priv_data = av_mallocz(s->oformat->priv_data_size); |
if (!s->priv_data) |
goto nomem; |
if (s->oformat->priv_class) { |
*(const AVClass**)s->priv_data= s->oformat->priv_class; |
av_opt_set_defaults(s->priv_data); |
} |
} else |
s->priv_data = NULL; |
|
if (filename) |
av_strlcpy(s->filename, filename, sizeof(s->filename)); |
*avctx = s; |
return 0; |
nomem: |
av_log(s, AV_LOG_ERROR, "Out of memory\n"); |
ret = AVERROR(ENOMEM); |
error: |
avformat_free_context(s); |
return ret; |
} |
|
#if FF_API_ALLOC_OUTPUT_CONTEXT |
AVFormatContext *avformat_alloc_output_context(const char *format, |
AVOutputFormat *oformat, const char *filename) |
{ |
AVFormatContext *avctx; |
int ret = avformat_alloc_output_context2(&avctx, oformat, format, filename); |
return ret < 0 ? NULL : avctx; |
} |
#endif |
|
static int validate_codec_tag(AVFormatContext *s, AVStream *st) |
{ |
const AVCodecTag *avctag; |
int n; |
enum AVCodecID id = AV_CODEC_ID_NONE; |
unsigned int tag = 0; |
|
/** |
* Check that tag + id is in the table |
* If neither is in the table -> OK |
* If tag is in the table with another id -> FAIL |
* If id is in the table with another tag -> FAIL unless strict < normal |
*/ |
for (n = 0; s->oformat->codec_tag[n]; n++) { |
avctag = s->oformat->codec_tag[n]; |
while (avctag->id != AV_CODEC_ID_NONE) { |
if (avpriv_toupper4(avctag->tag) == avpriv_toupper4(st->codec->codec_tag)) { |
id = avctag->id; |
if (id == st->codec->codec_id) |
return 1; |
} |
if (avctag->id == st->codec->codec_id) |
tag = avctag->tag; |
avctag++; |
} |
} |
if (id != AV_CODEC_ID_NONE) |
return 0; |
if (tag && (st->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL)) |
return 0; |
return 1; |
} |
|
|
static int init_muxer(AVFormatContext *s, AVDictionary **options) |
{ |
int ret = 0, i; |
AVStream *st; |
AVDictionary *tmp = NULL; |
AVCodecContext *codec = NULL; |
AVOutputFormat *of = s->oformat; |
|
if (options) |
av_dict_copy(&tmp, *options, 0); |
|
if ((ret = av_opt_set_dict(s, &tmp)) < 0) |
goto fail; |
if (s->priv_data && s->oformat->priv_class && *(const AVClass**)s->priv_data==s->oformat->priv_class && |
(ret = av_opt_set_dict(s->priv_data, &tmp)) < 0) |
goto fail; |
|
// some sanity checks |
if (s->nb_streams == 0 && !(of->flags & AVFMT_NOSTREAMS)) { |
av_log(s, AV_LOG_ERROR, "no streams\n"); |
ret = AVERROR(EINVAL); |
goto fail; |
} |
|
for (i = 0; i < s->nb_streams; i++) { |
st = s->streams[i]; |
codec = st->codec; |
|
switch (codec->codec_type) { |
case AVMEDIA_TYPE_AUDIO: |
if (codec->sample_rate <= 0) { |
av_log(s, AV_LOG_ERROR, "sample rate not set\n"); |
ret = AVERROR(EINVAL); |
goto fail; |
} |
if (!codec->block_align) |
codec->block_align = codec->channels * |
av_get_bits_per_sample(codec->codec_id) >> 3; |
break; |
case AVMEDIA_TYPE_VIDEO: |
if (codec->time_base.num <= 0 || |
codec->time_base.den <= 0) { //FIXME audio too? |
av_log(s, AV_LOG_ERROR, "time base not set\n"); |
ret = AVERROR(EINVAL); |
goto fail; |
} |
|
if ((codec->width <= 0 || codec->height <= 0) && |
!(of->flags & AVFMT_NODIMENSIONS)) { |
av_log(s, AV_LOG_ERROR, "dimensions not set\n"); |
ret = AVERROR(EINVAL); |
goto fail; |
} |
if (av_cmp_q(st->sample_aspect_ratio, codec->sample_aspect_ratio) |
&& FFABS(av_q2d(st->sample_aspect_ratio) - av_q2d(codec->sample_aspect_ratio)) > 0.004*av_q2d(st->sample_aspect_ratio) |
) { |
if (st->sample_aspect_ratio.num != 0 && |
st->sample_aspect_ratio.den != 0 && |
codec->sample_aspect_ratio.den != 0 && |
codec->sample_aspect_ratio.den != 0) { |
av_log(s, AV_LOG_ERROR, "Aspect ratio mismatch between muxer " |
"(%d/%d) and encoder layer (%d/%d)\n", |
st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, |
codec->sample_aspect_ratio.num, |
codec->sample_aspect_ratio.den); |
ret = AVERROR(EINVAL); |
goto fail; |
} |
} |
break; |
} |
|
if (of->codec_tag) { |
if ( codec->codec_tag |
&& codec->codec_id == AV_CODEC_ID_RAWVIDEO |
&& ( av_codec_get_tag(of->codec_tag, codec->codec_id) == 0 |
|| av_codec_get_tag(of->codec_tag, codec->codec_id) == MKTAG('r', 'a', 'w', ' ')) |
&& !validate_codec_tag(s, st)) { |
// the current rawvideo encoding system ends up setting |
// the wrong codec_tag for avi/mov, we override it here |
codec->codec_tag = 0; |
} |
if (codec->codec_tag) { |
if (!validate_codec_tag(s, st)) { |
char tagbuf[32], tagbuf2[32]; |
av_get_codec_tag_string(tagbuf, sizeof(tagbuf), codec->codec_tag); |
av_get_codec_tag_string(tagbuf2, sizeof(tagbuf2), av_codec_get_tag(s->oformat->codec_tag, codec->codec_id)); |
av_log(s, AV_LOG_ERROR, |
"Tag %s/0x%08x incompatible with output codec id '%d' (%s)\n", |
tagbuf, codec->codec_tag, codec->codec_id, tagbuf2); |
ret = AVERROR_INVALIDDATA; |
goto fail; |
} |
} else |
codec->codec_tag = av_codec_get_tag(of->codec_tag, codec->codec_id); |
} |
|
if (of->flags & AVFMT_GLOBALHEADER && |
!(codec->flags & CODEC_FLAG_GLOBAL_HEADER)) |
av_log(s, AV_LOG_WARNING, |
"Codec for stream %d does not use global headers " |
"but container format requires global headers\n", i); |
} |
|
if (!s->priv_data && of->priv_data_size > 0) { |
s->priv_data = av_mallocz(of->priv_data_size); |
if (!s->priv_data) { |
ret = AVERROR(ENOMEM); |
goto fail; |
} |
if (of->priv_class) { |
*(const AVClass **)s->priv_data = of->priv_class; |
av_opt_set_defaults(s->priv_data); |
if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0) |
goto fail; |
} |
} |
|
/* set muxer identification string */ |
if (s->nb_streams && !(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) { |
av_dict_set(&s->metadata, "encoder", LIBAVFORMAT_IDENT, 0); |
} |
|
if (options) { |
av_dict_free(options); |
*options = tmp; |
} |
|
return 0; |
|
fail: |
av_dict_free(&tmp); |
return ret; |
} |
|
static int init_pts(AVFormatContext *s) |
{ |
int i; |
AVStream *st; |
|
/* init PTS generation */ |
for (i = 0; i < s->nb_streams; i++) { |
int64_t den = AV_NOPTS_VALUE; |
st = s->streams[i]; |
|
switch (st->codec->codec_type) { |
case AVMEDIA_TYPE_AUDIO: |
den = (int64_t)st->time_base.num * st->codec->sample_rate; |
break; |
case AVMEDIA_TYPE_VIDEO: |
den = (int64_t)st->time_base.num * st->codec->time_base.den; |
break; |
default: |
break; |
} |
if (den != AV_NOPTS_VALUE) { |
if (den <= 0) |
return AVERROR_INVALIDDATA; |
|
frac_init(&st->pts, 0, 0, den); |
} |
} |
|
return 0; |
} |
|
int avformat_write_header(AVFormatContext *s, AVDictionary **options) |
{ |
int ret = 0; |
|
if (ret = init_muxer(s, options)) |
return ret; |
|
if (s->oformat->write_header) { |
ret = s->oformat->write_header(s); |
if (ret >= 0 && s->pb && s->pb->error < 0) |
ret = s->pb->error; |
if (ret < 0) |
return ret; |
} |
|
if ((ret = init_pts(s)) < 0) |
return ret; |
|
if (s->avoid_negative_ts < 0) { |
if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) { |
s->avoid_negative_ts = 0; |
} else |
s->avoid_negative_ts = 1; |
} |
|
return 0; |
} |
|
//FIXME merge with compute_pkt_fields |
static int compute_pkt_fields2(AVFormatContext *s, AVStream *st, AVPacket *pkt) |
{ |
int delay = FFMAX(st->codec->has_b_frames, st->codec->max_b_frames > 0); |
int num, den, frame_size, i; |
|
av_dlog(s, "compute_pkt_fields2: pts:%s dts:%s cur_dts:%s b:%d size:%d st:%d\n", |
av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), delay, pkt->size, pkt->stream_index); |
|
/* duration field */ |
if (pkt->duration == 0) { |
ff_compute_frame_duration(&num, &den, st, NULL, pkt); |
if (den && num) { |
pkt->duration = av_rescale(1, num * (int64_t)st->time_base.den * st->codec->ticks_per_frame, den * (int64_t)st->time_base.num); |
} |
} |
|
if (pkt->pts == AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && delay == 0) |
pkt->pts = pkt->dts; |
|
//XXX/FIXME this is a temporary hack until all encoders output pts |
if ((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !delay) { |
static int warned; |
if (!warned) { |
av_log(s, AV_LOG_WARNING, "Encoder did not produce proper pts, making some up.\n"); |
warned = 1; |
} |
pkt->dts = |
// pkt->pts= st->cur_dts; |
pkt->pts = st->pts.val; |
} |
|
//calculate dts from pts |
if (pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY) { |
st->pts_buffer[0] = pkt->pts; |
for (i = 1; i < delay + 1 && st->pts_buffer[i] == AV_NOPTS_VALUE; i++) |
st->pts_buffer[i] = pkt->pts + (i - delay - 1) * pkt->duration; |
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]); |
|
pkt->dts = st->pts_buffer[0]; |
} |
|
if (st->cur_dts && st->cur_dts != AV_NOPTS_VALUE && |
((!(s->oformat->flags & AVFMT_TS_NONSTRICT) && |
st->cur_dts >= pkt->dts) || st->cur_dts > pkt->dts)) { |
av_log(s, AV_LOG_ERROR, |
"Application provided invalid, non monotonically increasing dts to muxer in stream %d: %s >= %s\n", |
st->index, av_ts2str(st->cur_dts), av_ts2str(pkt->dts)); |
return AVERROR(EINVAL); |
} |
if (pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts < pkt->dts) { |
av_log(s, AV_LOG_ERROR, "pts (%s) < dts (%s) in stream %d\n", |
av_ts2str(pkt->pts), av_ts2str(pkt->dts), st->index); |
return AVERROR(EINVAL); |
} |
|
av_dlog(s, "av_write_frame: pts2:%s dts2:%s\n", |
av_ts2str(pkt->pts), av_ts2str(pkt->dts)); |
st->cur_dts = pkt->dts; |
st->pts.val = pkt->dts; |
|
/* update pts */ |
switch (st->codec->codec_type) { |
case AVMEDIA_TYPE_AUDIO: |
frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 1); |
|
/* HACK/FIXME, we skip the initial 0 size packets as they are most |
* likely equal to the encoder delay, but it would be better if we |
* had the real timestamps from the encoder */ |
if (frame_size >= 0 && (pkt->size || st->pts.num != st->pts.den >> 1 || st->pts.val)) { |
frac_add(&st->pts, (int64_t)st->time_base.den * frame_size); |
} |
break; |
case AVMEDIA_TYPE_VIDEO: |
frac_add(&st->pts, (int64_t)st->time_base.den * st->codec->time_base.num); |
break; |
default: |
break; |
} |
return 0; |
} |
|
/** |
* Make timestamps non negative, move side data from payload to internal struct, call muxer, and restore |
* sidedata. |
* |
* FIXME: this function should NEVER get undefined pts/dts beside when the |
* AVFMT_NOTIMESTAMPS is set. |
* Those additional safety checks should be dropped once the correct checks |
* are set in the callers. |
*/ |
static int write_packet(AVFormatContext *s, AVPacket *pkt) |
{ |
int ret, did_split; |
|
if (s->avoid_negative_ts > 0) { |
AVStream *st = s->streams[pkt->stream_index]; |
int64_t offset = st->mux_ts_offset; |
|
if (pkt->dts < 0 && pkt->dts != AV_NOPTS_VALUE && !s->offset) { |
s->offset = -pkt->dts; |
s->offset_timebase = st->time_base; |
} |
|
if (s->offset && !offset) { |
offset = st->mux_ts_offset = |
av_rescale_q_rnd(s->offset, |
s->offset_timebase, |
st->time_base, |
AV_ROUND_UP); |
} |
|
if (pkt->dts != AV_NOPTS_VALUE) |
pkt->dts += offset; |
if (pkt->pts != AV_NOPTS_VALUE) |
pkt->pts += offset; |
|
av_assert2(pkt->dts == AV_NOPTS_VALUE || pkt->dts >= 0); |
} |
|
did_split = av_packet_split_side_data(pkt); |
ret = s->oformat->write_packet(s, pkt); |
|
if (s->flush_packets && s->pb && ret >= 0 && s->flags & AVFMT_FLAG_FLUSH_PACKETS) |
avio_flush(s->pb); |
|
if (did_split) |
av_packet_merge_side_data(pkt); |
|
return ret; |
} |
|
int av_write_frame(AVFormatContext *s, AVPacket *pkt) |
{ |
int ret; |
|
if (!pkt) { |
if (s->oformat->flags & AVFMT_ALLOW_FLUSH) { |
ret = s->oformat->write_packet(s, NULL); |
if (s->flush_packets && s->pb && s->pb->error >= 0) |
avio_flush(s->pb); |
if (ret >= 0 && s->pb && s->pb->error < 0) |
ret = s->pb->error; |
return ret; |
} |
return 1; |
} |
|
ret = compute_pkt_fields2(s, s->streams[pkt->stream_index], pkt); |
|
if (ret < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
return ret; |
|
ret = write_packet(s, pkt); |
if (ret >= 0 && s->pb && s->pb->error < 0) |
ret = s->pb->error; |
|
if (ret >= 0) |
s->streams[pkt->stream_index]->nb_frames++; |
return ret; |
} |
|
#define CHUNK_START 0x1000 |
|
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, |
int (*compare)(AVFormatContext *, AVPacket *, AVPacket *)) |
{ |
AVPacketList **next_point, *this_pktl; |
AVStream *st = s->streams[pkt->stream_index]; |
int chunked = s->max_chunk_size || s->max_chunk_duration; |
|
this_pktl = av_mallocz(sizeof(AVPacketList)); |
if (!this_pktl) |
return AVERROR(ENOMEM); |
this_pktl->pkt = *pkt; |
#if FF_API_DESTRUCT_PACKET |
FF_DISABLE_DEPRECATION_WARNINGS |
pkt->destruct = NULL; // do not free original but only the copy |
FF_ENABLE_DEPRECATION_WARNINGS |
#endif |
pkt->buf = NULL; |
av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-allocated memory |
av_copy_packet_side_data(&this_pktl->pkt, &this_pktl->pkt); // copy side data |
|
if (s->streams[pkt->stream_index]->last_in_packet_buffer) { |
next_point = &(st->last_in_packet_buffer->next); |
} else { |
next_point = &s->packet_buffer; |
} |
|
if (chunked) { |
uint64_t max= av_rescale_q_rnd(s->max_chunk_duration, AV_TIME_BASE_Q, st->time_base, AV_ROUND_UP); |
st->interleaver_chunk_size += pkt->size; |
st->interleaver_chunk_duration += pkt->duration; |
if ( (s->max_chunk_size && st->interleaver_chunk_size > s->max_chunk_size) |
|| (max && st->interleaver_chunk_duration > max)) { |
st->interleaver_chunk_size = 0; |
this_pktl->pkt.flags |= CHUNK_START; |
if (max && st->interleaver_chunk_duration > max) { |
int64_t syncoffset = (st->codec->codec_type == AVMEDIA_TYPE_VIDEO)*max/2; |
int64_t syncto = av_rescale(pkt->dts + syncoffset, 1, max)*max - syncoffset; |
|
st->interleaver_chunk_duration += (pkt->dts - syncto)/8 - max; |
} else |
st->interleaver_chunk_duration = 0; |
} |
} |
if (*next_point) { |
if (chunked && !(this_pktl->pkt.flags & CHUNK_START)) |
goto next_non_null; |
|
if (compare(s, &s->packet_buffer_end->pkt, pkt)) { |
while ( *next_point |
&& ((chunked && !((*next_point)->pkt.flags&CHUNK_START)) |
|| !compare(s, &(*next_point)->pkt, pkt))) |
next_point = &(*next_point)->next; |
if (*next_point) |
goto next_non_null; |
} else { |
next_point = &(s->packet_buffer_end->next); |
} |
} |
av_assert1(!*next_point); |
|
s->packet_buffer_end = this_pktl; |
next_non_null: |
|
this_pktl->next = *next_point; |
|
s->streams[pkt->stream_index]->last_in_packet_buffer = |
*next_point = this_pktl; |
return 0; |
} |
|
static int interleave_compare_dts(AVFormatContext *s, AVPacket *next, |
AVPacket *pkt) |
{ |
AVStream *st = s->streams[pkt->stream_index]; |
AVStream *st2 = s->streams[next->stream_index]; |
int comp = av_compare_ts(next->dts, st2->time_base, pkt->dts, |
st->time_base); |
if (s->audio_preload && ((st->codec->codec_type == AVMEDIA_TYPE_AUDIO) != (st2->codec->codec_type == AVMEDIA_TYPE_AUDIO))) { |
int64_t ts = av_rescale_q(pkt ->dts, st ->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO); |
int64_t ts2= av_rescale_q(next->dts, st2->time_base, AV_TIME_BASE_Q) - s->audio_preload*(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO); |
if (ts == ts2) { |
ts= ( pkt ->dts* st->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st ->codec->codec_type == AVMEDIA_TYPE_AUDIO)* st->time_base.den)*st2->time_base.den |
-( next->dts*st2->time_base.num*AV_TIME_BASE - s->audio_preload*(int64_t)(st2->codec->codec_type == AVMEDIA_TYPE_AUDIO)*st2->time_base.den)* st->time_base.den; |
ts2=0; |
} |
comp= (ts>ts2) - (ts<ts2); |
} |
|
if (comp == 0) |
return pkt->stream_index < next->stream_index; |
return comp > 0; |
} |
|
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, |
AVPacket *pkt, int flush) |
{ |
AVPacketList *pktl; |
int stream_count = 0, noninterleaved_count = 0; |
int64_t delta_dts_max = 0; |
int i, ret; |
|
if (pkt) { |
ret = ff_interleave_add_packet(s, pkt, interleave_compare_dts); |
if (ret < 0) |
return ret; |
} |
|
for (i = 0; i < s->nb_streams; i++) { |
if (s->streams[i]->last_in_packet_buffer) { |
++stream_count; |
} else if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) { |
++noninterleaved_count; |
} |
} |
|
if (s->nb_streams == stream_count) { |
flush = 1; |
} else if (!flush) { |
for (i=0; i < s->nb_streams; i++) { |
if (s->streams[i]->last_in_packet_buffer) { |
int64_t delta_dts = |
av_rescale_q(s->streams[i]->last_in_packet_buffer->pkt.dts, |
s->streams[i]->time_base, |
AV_TIME_BASE_Q) - |
av_rescale_q(s->packet_buffer->pkt.dts, |
s->streams[s->packet_buffer->pkt.stream_index]->time_base, |
AV_TIME_BASE_Q); |
delta_dts_max= FFMAX(delta_dts_max, delta_dts); |
} |
} |
if (s->nb_streams == stream_count+noninterleaved_count && |
delta_dts_max > 20*AV_TIME_BASE) { |
av_log(s, AV_LOG_DEBUG, "flushing with %d noninterleaved\n", noninterleaved_count); |
flush = 1; |
} |
} |
if (stream_count && flush) { |
AVStream *st; |
pktl = s->packet_buffer; |
*out = pktl->pkt; |
st = s->streams[out->stream_index]; |
|
s->packet_buffer = pktl->next; |
if (!s->packet_buffer) |
s->packet_buffer_end = NULL; |
|
if (st->last_in_packet_buffer == pktl) |
st->last_in_packet_buffer = NULL; |
av_freep(&pktl); |
|
return 1; |
} else { |
av_init_packet(out); |
return 0; |
} |
} |
|
/** |
* Interleave an AVPacket correctly so it can be muxed. |
* @param out the interleaved packet will be output here |
* @param in the input packet |
* @param flush 1 if no further packets are available as input and all |
* remaining packets should be output |
* @return 1 if a packet was output, 0 if no packet could be output, |
* < 0 if an error occurred |
*/ |
static int interleave_packet(AVFormatContext *s, AVPacket *out, AVPacket *in, int flush) |
{ |
if (s->oformat->interleave_packet) { |
int ret = s->oformat->interleave_packet(s, out, in, flush); |
if (in) |
av_free_packet(in); |
return ret; |
} else |
return ff_interleave_packet_per_dts(s, out, in, flush); |
} |
|
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt) |
{ |
int ret, flush = 0; |
|
if (pkt) { |
AVStream *st = s->streams[pkt->stream_index]; |
|
//FIXME/XXX/HACK drop zero sized packets |
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && pkt->size == 0) |
return 0; |
|
av_dlog(s, "av_interleaved_write_frame size:%d dts:%s pts:%s\n", |
pkt->size, av_ts2str(pkt->dts), av_ts2str(pkt->pts)); |
if ((ret = compute_pkt_fields2(s, st, pkt)) < 0 && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
return ret; |
|
if (pkt->dts == AV_NOPTS_VALUE && !(s->oformat->flags & AVFMT_NOTIMESTAMPS)) |
return AVERROR(EINVAL); |
} else { |
av_dlog(s, "av_interleaved_write_frame FLUSH\n"); |
flush = 1; |
} |
|
for (;; ) { |
AVPacket opkt; |
int ret = interleave_packet(s, &opkt, pkt, flush); |
if (ret <= 0) //FIXME cleanup needed for ret<0 ? |
return ret; |
|
ret = write_packet(s, &opkt); |
if (ret >= 0) |
s->streams[opkt.stream_index]->nb_frames++; |
|
av_free_packet(&opkt); |
pkt = NULL; |
|
if (ret < 0) |
return ret; |
if(s->pb && s->pb->error) |
return s->pb->error; |
} |
} |
|
int av_write_trailer(AVFormatContext *s) |
{ |
int ret, i; |
|
for (;; ) { |
AVPacket pkt; |
ret = interleave_packet(s, &pkt, NULL, 1); |
if (ret < 0) //FIXME cleanup needed for ret<0 ? |
goto fail; |
if (!ret) |
break; |
|
ret = write_packet(s, &pkt); |
if (ret >= 0) |
s->streams[pkt.stream_index]->nb_frames++; |
|
av_free_packet(&pkt); |
|
if (ret < 0) |
goto fail; |
if(s->pb && s->pb->error) |
goto fail; |
} |
|
if (s->oformat->write_trailer) |
ret = s->oformat->write_trailer(s); |
|
fail: |
if (s->pb) |
avio_flush(s->pb); |
if (ret == 0) |
ret = s->pb ? s->pb->error : 0; |
for (i = 0; i < s->nb_streams; i++) { |
av_freep(&s->streams[i]->priv_data); |
av_freep(&s->streams[i]->index_entries); |
} |
if (s->oformat->priv_class) |
av_opt_free(s->priv_data); |
av_freep(&s->priv_data); |
return ret; |
} |
|
int av_get_output_timestamp(struct AVFormatContext *s, int stream, |
int64_t *dts, int64_t *wall) |
{ |
if (!s->oformat || !s->oformat->get_output_timestamp) |
return AVERROR(ENOSYS); |
s->oformat->get_output_timestamp(s, stream, dts, wall); |
return 0; |
} |
|
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, |
AVFormatContext *src) |
{ |
AVPacket local_pkt; |
|
local_pkt = *pkt; |
local_pkt.stream_index = dst_stream; |
if (pkt->pts != AV_NOPTS_VALUE) |
local_pkt.pts = av_rescale_q(pkt->pts, |
src->streams[pkt->stream_index]->time_base, |
dst->streams[dst_stream]->time_base); |
if (pkt->dts != AV_NOPTS_VALUE) |
local_pkt.dts = av_rescale_q(pkt->dts, |
src->streams[pkt->stream_index]->time_base, |
dst->streams[dst_stream]->time_base); |
if (pkt->duration) |
local_pkt.duration = av_rescale_q(pkt->duration, |
src->streams[pkt->stream_index]->time_base, |
dst->streams[dst_stream]->time_base); |
return av_write_frame(dst, &local_pkt); |
} |