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ffmpeg/fftools/ffmpeg_mux.c
Andreas Rheinhardt 44620ade25 fftools/ffmpeg_mux_init: Fix attachment_filename use-after-free 
The filename is freed with the OptionsContext and therefore
there will be a use-after-free when reporting the filename
in print_stream_maps(). So create a copy of the string.

This is a regression since 8aed3911fc.
fate-lavf-mkv_attachment exhibits it (and reports a random nonsense
filename here), but this does not make the test fail (not even with
valgrind; only with ASAN, as it aborts on use-after-free).

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-02-18 18:09:33 +01:00

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/*
* 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 <stdatomic.h>
#include <stdio.h>
#include <string.h>
#include "ffmpeg.h"
#include "ffmpeg_mux.h"
#include "ffmpeg_utils.h"
#include "sync_queue.h"
#include "libavutil/avstring.h"
#include "libavutil/fifo.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/time.h"
#include "libavutil/timestamp.h"
#include "libavcodec/packet.h"
#include "libavformat/avformat.h"
#include "libavformat/avio.h"
typedef struct MuxThreadContext {
AVPacket *pkt;
AVPacket *fix_sub_duration_pkt;
} MuxThreadContext;
static Muxer *mux_from_of(OutputFile *of)
{
return (Muxer*)of;
}
static int64_t filesize(AVIOContext *pb)
{
int64_t ret = -1;
if (pb) {
ret = avio_size(pb);
if (ret <= 0) // FIXME improve avio_size() so it works with non seekable output too
ret = avio_tell(pb);
}
return ret;
}
static void mux_log_debug_ts(OutputStream *ost, const AVPacket *pkt)
{
static const char *desc[] = {
[LATENCY_PROBE_DEMUX] = "demux",
[LATENCY_PROBE_DEC_PRE] = "decode",
[LATENCY_PROBE_DEC_POST] = "decode",
[LATENCY_PROBE_FILTER_PRE] = "filter",
[LATENCY_PROBE_FILTER_POST] = "filter",
[LATENCY_PROBE_ENC_PRE] = "encode",
[LATENCY_PROBE_ENC_POST] = "encode",
[LATENCY_PROBE_NB] = "mux",
};
char latency[512];
*latency = 0;
if (pkt->opaque_ref) {
const FrameData *fd = (FrameData*)pkt->opaque_ref->data;
int64_t now = av_gettime_relative();
int64_t total = INT64_MIN;
int next;
for (unsigned i = 0; i < FF_ARRAY_ELEMS(fd->wallclock); i = next) {
int64_t val = fd->wallclock[i];
next = i + 1;
if (val == INT64_MIN)
continue;
if (total == INT64_MIN) {
total = now - val;
snprintf(latency, sizeof(latency), "total:%gms", total / 1e3);
}
// find the next valid entry
for (; next <= FF_ARRAY_ELEMS(fd->wallclock); next++) {
int64_t val_next = (next == FF_ARRAY_ELEMS(fd->wallclock)) ?
now : fd->wallclock[next];
int64_t diff;
if (val_next == INT64_MIN)
continue;
diff = val_next - val;
// print those stages that take at least 5% of total
if (100. * diff > 5. * total) {
av_strlcat(latency, ", ", sizeof(latency));
if (!strcmp(desc[i], desc[next]))
av_strlcat(latency, desc[i], sizeof(latency));
else
av_strlcatf(latency, sizeof(latency), "%s-%s:",
desc[i], desc[next]);
av_strlcatf(latency, sizeof(latency), " %gms/%d%%",
diff / 1e3, (int)(100. * diff / total));
}
break;
}
}
}
av_log(ost, AV_LOG_INFO, "muxer <- pts:%s pts_time:%s dts:%s dts_time:%s "
"duration:%s duration_time:%s size:%d latency(%s)\n",
av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &ost->st->time_base),
pkt->size, *latency ? latency : "N/A");
}
static int mux_fixup_ts(Muxer *mux, MuxStream *ms, AVPacket *pkt)
{
OutputStream *ost = &ms->ost;
#if FFMPEG_OPT_VSYNC_DROP
if (ost->type == AVMEDIA_TYPE_VIDEO && ost->vsync_method == VSYNC_DROP)
pkt->pts = pkt->dts = AV_NOPTS_VALUE;
#endif
// rescale timestamps to the stream timebase
if (ost->type == AVMEDIA_TYPE_AUDIO && !ost->enc) {
// use av_rescale_delta() for streamcopying audio, to preserve
// accuracy with coarse input timebases
int duration = av_get_audio_frame_duration2(ost->st->codecpar, pkt->size);
if (!duration)
duration = ost->st->codecpar->frame_size;
pkt->dts = av_rescale_delta(pkt->time_base, pkt->dts,
(AVRational){1, ost->st->codecpar->sample_rate}, duration,
&ms->ts_rescale_delta_last, ost->st->time_base);
pkt->pts = pkt->dts;
pkt->duration = av_rescale_q(pkt->duration, pkt->time_base, ost->st->time_base);
} else
av_packet_rescale_ts(pkt, pkt->time_base, ost->st->time_base);
pkt->time_base = ost->st->time_base;
if (!(mux->fc->oformat->flags & AVFMT_NOTIMESTAMPS)) {
if (pkt->dts != AV_NOPTS_VALUE &&
pkt->pts != AV_NOPTS_VALUE &&
pkt->dts > pkt->pts) {
av_log(ost, AV_LOG_WARNING, "Invalid DTS: %"PRId64" PTS: %"PRId64", replacing by guess\n",
pkt->dts, pkt->pts);
pkt->pts =
pkt->dts = pkt->pts + pkt->dts + ms->last_mux_dts + 1
- FFMIN3(pkt->pts, pkt->dts, ms->last_mux_dts + 1)
- FFMAX3(pkt->pts, pkt->dts, ms->last_mux_dts + 1);
}
if ((ost->type == AVMEDIA_TYPE_AUDIO || ost->type == AVMEDIA_TYPE_VIDEO || ost->type == AVMEDIA_TYPE_SUBTITLE) &&
pkt->dts != AV_NOPTS_VALUE &&
ms->last_mux_dts != AV_NOPTS_VALUE) {
int64_t max = ms->last_mux_dts + !(mux->fc->oformat->flags & AVFMT_TS_NONSTRICT);
if (pkt->dts < max) {
int loglevel = max - pkt->dts > 2 || ost->type == AVMEDIA_TYPE_VIDEO ? AV_LOG_WARNING : AV_LOG_DEBUG;
if (exit_on_error)
loglevel = AV_LOG_ERROR;
av_log(ost, loglevel, "Non-monotonic DTS; "
"previous: %"PRId64", current: %"PRId64"; ",
ms->last_mux_dts, pkt->dts);
if (exit_on_error) {
return AVERROR(EINVAL);
}
av_log(ost, loglevel, "changing to %"PRId64". This may result "
"in incorrect timestamps in the output file.\n",
max);
if (pkt->pts >= pkt->dts)
pkt->pts = FFMAX(pkt->pts, max);
pkt->dts = max;
}
}
}
ms->last_mux_dts = pkt->dts;
if (debug_ts)
mux_log_debug_ts(ost, pkt);
return 0;
}
static int write_packet(Muxer *mux, OutputStream *ost, AVPacket *pkt)
{
MuxStream *ms = ms_from_ost(ost);
AVFormatContext *s = mux->fc;
int64_t fs;
uint64_t frame_num;
int ret;
fs = filesize(s->pb);
atomic_store(&mux->last_filesize, fs);
if (fs >= mux->limit_filesize) {
ret = AVERROR_EOF;
goto fail;
}
ret = mux_fixup_ts(mux, ms, pkt);
if (ret < 0)
goto fail;
ms->data_size_mux += pkt->size;
frame_num = atomic_fetch_add(&ost->packets_written, 1);
pkt->stream_index = ost->index;
if (ms->stats.io)
enc_stats_write(ost, &ms->stats, NULL, pkt, frame_num);
ret = av_interleaved_write_frame(s, pkt);
if (ret < 0) {
av_log(ost, AV_LOG_ERROR,
"Error submitting a packet to the muxer: %s\n",
av_err2str(ret));
goto fail;
}
return 0;
fail:
av_packet_unref(pkt);
return ret;
}
static int sync_queue_process(Muxer *mux, MuxStream *ms, AVPacket *pkt, int *stream_eof)
{
OutputFile *of = &mux->of;
if (ms->sq_idx_mux >= 0) {
int ret = sq_send(mux->sq_mux, ms->sq_idx_mux, SQPKT(pkt));
if (ret < 0) {
if (ret == AVERROR_EOF)
*stream_eof = 1;
return ret;
}
while (1) {
ret = sq_receive(mux->sq_mux, -1, SQPKT(mux->sq_pkt));
if (ret < 0) {
/* n.b.: We forward EOF from the sync queue, terminating muxing.
* This assumes that if a muxing sync queue is present, then all
* the streams use it. That is true currently, but may change in
* the future, then this code needs to be revisited.
*/
return ret == AVERROR(EAGAIN) ? 0 : ret;
}
ret = write_packet(mux, of->streams[ret],
mux->sq_pkt);
if (ret < 0)
return ret;
}
} else if (pkt)
return write_packet(mux, &ms->ost, pkt);
return 0;
}
static int of_streamcopy(OutputFile *of, OutputStream *ost, AVPacket *pkt);
/* apply the output bitstream filters */
static int mux_packet_filter(Muxer *mux, MuxThreadContext *mt,
OutputStream *ost, AVPacket *pkt, int *stream_eof)
{
MuxStream *ms = ms_from_ost(ost);
const char *err_msg;
int ret = 0;
if (pkt && !ost->enc) {
ret = of_streamcopy(&mux->of, ost, pkt);
if (ret == AVERROR(EAGAIN))
return 0;
else if (ret == AVERROR_EOF) {
av_packet_unref(pkt);
pkt = NULL;
ret = 0;
*stream_eof = 1;
} else if (ret < 0)
goto fail;
}
// emit heartbeat for -fix_sub_duration;
// we are only interested in heartbeats on on random access points.
if (pkt && (pkt->flags & AV_PKT_FLAG_KEY)) {
mt->fix_sub_duration_pkt->opaque = (void*)(intptr_t)PKT_OPAQUE_FIX_SUB_DURATION;
mt->fix_sub_duration_pkt->pts = pkt->pts;
mt->fix_sub_duration_pkt->time_base = pkt->time_base;
ret = sch_mux_sub_heartbeat(mux->sch, mux->sch_idx, ms->sch_idx,
mt->fix_sub_duration_pkt);
if (ret < 0)
goto fail;
}
if (ms->bsf_ctx) {
int bsf_eof = 0;
if (pkt)
av_packet_rescale_ts(pkt, pkt->time_base, ms->bsf_ctx->time_base_in);
ret = av_bsf_send_packet(ms->bsf_ctx, pkt);
if (ret < 0) {
err_msg = "submitting a packet for bitstream filtering";
goto fail;
}
while (!bsf_eof) {
ret = av_bsf_receive_packet(ms->bsf_ctx, ms->bsf_pkt);
if (ret == AVERROR(EAGAIN))
return 0;
else if (ret == AVERROR_EOF)
bsf_eof = 1;
else if (ret < 0) {
av_log(ost, AV_LOG_ERROR,
"Error applying bitstream filters to a packet: %s",
av_err2str(ret));
if (exit_on_error)
return ret;
continue;
}
if (!bsf_eof)
ms->bsf_pkt->time_base = ms->bsf_ctx->time_base_out;
ret = sync_queue_process(mux, ms, bsf_eof ? NULL : ms->bsf_pkt, stream_eof);
if (ret < 0)
goto mux_fail;
}
*stream_eof = 1;
} else {
ret = sync_queue_process(mux, ms, pkt, stream_eof);
if (ret < 0)
goto mux_fail;
}
return *stream_eof ? AVERROR_EOF : 0;
mux_fail:
err_msg = "submitting a packet to the muxer";
fail:
if (ret != AVERROR_EOF)
av_log(ost, AV_LOG_ERROR, "Error %s: %s\n", err_msg, av_err2str(ret));
return ret;
}
static void thread_set_name(OutputFile *of)
{
char name[16];
snprintf(name, sizeof(name), "mux%d:%s", of->index, of->format->name);
ff_thread_setname(name);
}
static void mux_thread_uninit(MuxThreadContext *mt)
{
av_packet_free(&mt->pkt);
av_packet_free(&mt->fix_sub_duration_pkt);
memset(mt, 0, sizeof(*mt));
}
static int mux_thread_init(MuxThreadContext *mt)
{
memset(mt, 0, sizeof(*mt));
mt->pkt = av_packet_alloc();
if (!mt->pkt)
goto fail;
mt->fix_sub_duration_pkt = av_packet_alloc();
if (!mt->fix_sub_duration_pkt)
goto fail;
return 0;
fail:
mux_thread_uninit(mt);
return AVERROR(ENOMEM);
}
void *muxer_thread(void *arg)
{
Muxer *mux = arg;
OutputFile *of = &mux->of;
MuxThreadContext mt;
int ret = 0;
ret = mux_thread_init(&mt);
if (ret < 0)
goto finish;
thread_set_name(of);
while (1) {
OutputStream *ost;
int stream_idx, stream_eof = 0;
ret = sch_mux_receive(mux->sch, of->index, mt.pkt);
stream_idx = mt.pkt->stream_index;
if (stream_idx < 0) {
av_log(mux, AV_LOG_VERBOSE, "All streams finished\n");
ret = 0;
break;
}
ost = of->streams[mux->sch_stream_idx[stream_idx]];
mt.pkt->stream_index = ost->index;
ret = mux_packet_filter(mux, &mt, ost, ret < 0 ? NULL : mt.pkt, &stream_eof);
av_packet_unref(mt.pkt);
if (ret == AVERROR_EOF) {
if (stream_eof) {
sch_mux_receive_finish(mux->sch, of->index, stream_idx);
} else {
av_log(mux, AV_LOG_VERBOSE, "Muxer returned EOF\n");
ret = 0;
break;
}
} else if (ret < 0) {
av_log(mux, AV_LOG_ERROR, "Error muxing a packet\n");
break;
}
}
finish:
mux_thread_uninit(&mt);
return (void*)(intptr_t)ret;
}
static int of_streamcopy(OutputFile *of, OutputStream *ost, AVPacket *pkt)
{
MuxStream *ms = ms_from_ost(ost);
FrameData *fd = pkt->opaque_ref ? (FrameData*)pkt->opaque_ref->data : NULL;
int64_t dts = fd ? fd->dts_est : AV_NOPTS_VALUE;
int64_t start_time = (of->start_time == AV_NOPTS_VALUE) ? 0 : of->start_time;
int64_t ts_offset;
if (of->recording_time != INT64_MAX &&
dts >= of->recording_time + start_time)
return AVERROR_EOF;
if (!ms->streamcopy_started && !(pkt->flags & AV_PKT_FLAG_KEY) &&
!ms->copy_initial_nonkeyframes)
return AVERROR(EAGAIN);
if (!ms->streamcopy_started) {
if (!ms->copy_prior_start &&
(pkt->pts == AV_NOPTS_VALUE ?
dts < ms->ts_copy_start :
pkt->pts < av_rescale_q(ms->ts_copy_start, AV_TIME_BASE_Q, pkt->time_base)))
return AVERROR(EAGAIN);
if (of->start_time != AV_NOPTS_VALUE && dts < of->start_time)
return AVERROR(EAGAIN);
}
ts_offset = av_rescale_q(start_time, AV_TIME_BASE_Q, pkt->time_base);
if (pkt->pts != AV_NOPTS_VALUE)
pkt->pts -= ts_offset;
if (pkt->dts == AV_NOPTS_VALUE) {
pkt->dts = av_rescale_q(dts, AV_TIME_BASE_Q, pkt->time_base);
} else if (ost->st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
pkt->pts = pkt->dts - ts_offset;
}
pkt->dts -= ts_offset;
ms->streamcopy_started = 1;
return 0;
}
int print_sdp(const char *filename);
int print_sdp(const char *filename)
{
char sdp[16384];
int i;
int j, ret;
AVIOContext *sdp_pb;
AVFormatContext **avc;
avc = av_malloc_array(nb_output_files, sizeof(*avc));
if (!avc)
return AVERROR(ENOMEM);
for (i = 0, j = 0; i < nb_output_files; i++) {
if (!strcmp(output_files[i]->format->name, "rtp")) {
avc[j] = mux_from_of(output_files[i])->fc;
j++;
}
}
if (!j) {
av_log(NULL, AV_LOG_ERROR, "No output streams in the SDP.\n");
ret = AVERROR(EINVAL);
goto fail;
}
ret = av_sdp_create(avc, j, sdp, sizeof(sdp));
if (ret < 0)
goto fail;
if (!filename) {
printf("SDP:\n%s\n", sdp);
fflush(stdout);
} else {
ret = avio_open2(&sdp_pb, filename, AVIO_FLAG_WRITE, &int_cb, NULL);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Failed to open sdp file '%s'\n", filename);
goto fail;
}
avio_print(sdp_pb, sdp);
avio_closep(&sdp_pb);
}
fail:
av_freep(&avc);
return ret;
}
int mux_check_init(void *arg)
{
Muxer *mux = arg;
OutputFile *of = &mux->of;
AVFormatContext *fc = mux->fc;
int ret;
ret = avformat_write_header(fc, &mux->opts);
if (ret < 0) {
av_log(mux, AV_LOG_ERROR, "Could not write header (incorrect codec "
"parameters ?): %s\n", av_err2str(ret));
return ret;
}
//assert_avoptions(of->opts);
mux->header_written = 1;
av_dump_format(fc, of->index, fc->url, 1);
atomic_fetch_add(&nb_output_dumped, 1);
return 0;
}
static int bsf_init(MuxStream *ms)
{
OutputStream *ost = &ms->ost;
AVBSFContext *ctx = ms->bsf_ctx;
int ret;
if (!ctx)
return avcodec_parameters_copy(ost->st->codecpar, ost->par_in);
ret = avcodec_parameters_copy(ctx->par_in, ost->par_in);
if (ret < 0)
return ret;
ctx->time_base_in = ost->st->time_base;
ret = av_bsf_init(ctx);
if (ret < 0) {
av_log(ms, AV_LOG_ERROR, "Error initializing bitstream filter: %s\n",
ctx->filter->name);
return ret;
}
ret = avcodec_parameters_copy(ost->st->codecpar, ctx->par_out);
if (ret < 0)
return ret;
ost->st->time_base = ctx->time_base_out;
ms->bsf_pkt = av_packet_alloc();
if (!ms->bsf_pkt)
return AVERROR(ENOMEM);
return 0;
}
int of_stream_init(OutputFile *of, OutputStream *ost)
{
Muxer *mux = mux_from_of(of);
MuxStream *ms = ms_from_ost(ost);
int ret;
/* initialize bitstream filters for the output stream
* needs to be done here, because the codec id for streamcopy is not
* known until now */
ret = bsf_init(ms);
if (ret < 0)
return ret;
if (ms->stream_duration) {
ost->st->duration = av_rescale_q(ms->stream_duration, ms->stream_duration_tb,
ost->st->time_base);
}
if (ms->sch_idx >= 0)
return sch_mux_stream_ready(mux->sch, of->index, ms->sch_idx);
return 0;
}
static int check_written(OutputFile *of)
{
int64_t total_packets_written = 0;
int pass1_used = 1;
int ret = 0;
for (int i = 0; i < of->nb_streams; i++) {
OutputStream *ost = of->streams[i];
uint64_t packets_written = atomic_load(&ost->packets_written);
total_packets_written += packets_written;
if (ost->enc_ctx &&
(ost->enc_ctx->flags & (AV_CODEC_FLAG_PASS1 | AV_CODEC_FLAG_PASS2))
!= AV_CODEC_FLAG_PASS1)
pass1_used = 0;
if (!packets_written &&
(abort_on_flags & ABORT_ON_FLAG_EMPTY_OUTPUT_STREAM)) {
av_log(ost, AV_LOG_FATAL, "Empty output stream\n");
ret = err_merge(ret, AVERROR(EINVAL));
}
}
if (!total_packets_written) {
int level = AV_LOG_WARNING;
if (abort_on_flags & ABORT_ON_FLAG_EMPTY_OUTPUT) {
ret = err_merge(ret, AVERROR(EINVAL));
level = AV_LOG_FATAL;
}
av_log(of, level, "Output file is empty, nothing was encoded%s\n",
pass1_used ? "" : "(check -ss / -t / -frames parameters if used)");
}
return ret;
}
static void mux_final_stats(Muxer *mux)
{
OutputFile *of = &mux->of;
uint64_t total_packets = 0, total_size = 0;
uint64_t video_size = 0, audio_size = 0, subtitle_size = 0,
extra_size = 0, other_size = 0;
uint8_t overhead[16] = "unknown";
int64_t file_size = of_filesize(of);
av_log(of, AV_LOG_VERBOSE, "Output file #%d (%s):\n",
of->index, of->url);
for (int j = 0; j < of->nb_streams; j++) {
OutputStream *ost = of->streams[j];
MuxStream *ms = ms_from_ost(ost);
const AVCodecParameters *par = ost->st->codecpar;
const enum AVMediaType type = par->codec_type;
const uint64_t s = ms->data_size_mux;
switch (type) {
case AVMEDIA_TYPE_VIDEO: video_size += s; break;
case AVMEDIA_TYPE_AUDIO: audio_size += s; break;
case AVMEDIA_TYPE_SUBTITLE: subtitle_size += s; break;
default: other_size += s; break;
}
extra_size += par->extradata_size;
total_size += s;
total_packets += atomic_load(&ost->packets_written);
av_log(of, AV_LOG_VERBOSE, " Output stream #%d:%d (%s): ",
of->index, j, av_get_media_type_string(type));
if (ost->enc) {
av_log(of, AV_LOG_VERBOSE, "%"PRIu64" frames encoded",
ost->frames_encoded);
if (type == AVMEDIA_TYPE_AUDIO)
av_log(of, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ost->samples_encoded);
av_log(of, AV_LOG_VERBOSE, "; ");
}
av_log(of, AV_LOG_VERBOSE, "%"PRIu64" packets muxed (%"PRIu64" bytes); ",
atomic_load(&ost->packets_written), s);
av_log(of, AV_LOG_VERBOSE, "\n");
}
av_log(of, AV_LOG_VERBOSE, " Total: %"PRIu64" packets (%"PRIu64" bytes) muxed\n",
total_packets, total_size);
if (total_size && file_size > 0 && file_size >= total_size) {
snprintf(overhead, sizeof(overhead), "%f%%",
100.0 * (file_size - total_size) / total_size);
}
av_log(of, AV_LOG_INFO,
"video:%1.0fKiB audio:%1.0fKiB subtitle:%1.0fKiB other streams:%1.0fKiB "
"global headers:%1.0fKiB muxing overhead: %s\n",
video_size / 1024.0,
audio_size / 1024.0,
subtitle_size / 1024.0,
other_size / 1024.0,
extra_size / 1024.0,
overhead);
}
int of_write_trailer(OutputFile *of)
{
Muxer *mux = mux_from_of(of);
AVFormatContext *fc = mux->fc;
int ret, mux_result = 0;
if (!mux->header_written) {
av_log(mux, AV_LOG_ERROR,
"Nothing was written into output file, because "
"at least one of its streams received no packets.\n");
return AVERROR(EINVAL);
}
ret = av_write_trailer(fc);
if (ret < 0) {
av_log(mux, AV_LOG_ERROR, "Error writing trailer: %s\n", av_err2str(ret));
mux_result = err_merge(mux_result, ret);
}
mux->last_filesize = filesize(fc->pb);
if (!(of->format->flags & AVFMT_NOFILE)) {
ret = avio_closep(&fc->pb);
if (ret < 0) {
av_log(mux, AV_LOG_ERROR, "Error closing file: %s\n", av_err2str(ret));
mux_result = err_merge(mux_result, ret);
}
}
mux_final_stats(mux);
// check whether anything was actually written
ret = check_written(of);
mux_result = err_merge(mux_result, ret);
return mux_result;
}
static void enc_stats_uninit(EncStats *es)
{
for (int i = 0; i < es->nb_components; i++)
av_freep(&es->components[i].str);
av_freep(&es->components);
if (es->lock_initialized)
pthread_mutex_destroy(&es->lock);
es->lock_initialized = 0;
}
static void ost_free(OutputStream **post)
{
OutputStream *ost = *post;
MuxStream *ms;
if (!ost)
return;
ms = ms_from_ost(ost);
enc_free(&ost->enc);
if (ost->logfile) {
if (fclose(ost->logfile))
av_log(ms, AV_LOG_ERROR,
"Error closing logfile, loss of information possible: %s\n",
av_err2str(AVERROR(errno)));
ost->logfile = NULL;
}
avcodec_parameters_free(&ost->par_in);
av_bsf_free(&ms->bsf_ctx);
av_packet_free(&ms->bsf_pkt);
av_packet_free(&ms->pkt);
av_dict_free(&ost->encoder_opts);
av_freep(&ost->kf.pts);
av_expr_free(ost->kf.pexpr);
av_freep(&ost->logfile_prefix);
av_freep(&ost->apad);
av_freep(&ost->attachment_filename);
#if FFMPEG_OPT_MAP_CHANNEL
av_freep(&ost->audio_channels_map);
ost->audio_channels_mapped = 0;
#endif
av_dict_free(&ost->sws_dict);
av_dict_free(&ost->swr_opts);
if (ost->enc_ctx)
av_freep(&ost->enc_ctx->stats_in);
avcodec_free_context(&ost->enc_ctx);
enc_stats_uninit(&ost->enc_stats_pre);
enc_stats_uninit(&ost->enc_stats_post);
enc_stats_uninit(&ms->stats);
av_freep(post);
}
static void fc_close(AVFormatContext **pfc)
{
AVFormatContext *fc = *pfc;
if (!fc)
return;
if (!(fc->oformat->flags & AVFMT_NOFILE))
avio_closep(&fc->pb);
avformat_free_context(fc);
*pfc = NULL;
}
void of_free(OutputFile **pof)
{
OutputFile *of = *pof;
Muxer *mux;
if (!of)
return;
mux = mux_from_of(of);
sq_free(&mux->sq_mux);
for (int i = 0; i < of->nb_streams; i++)
ost_free(&of->streams[i]);
av_freep(&of->streams);
av_freep(&mux->sch_stream_idx);
av_dict_free(&mux->opts);
av_packet_free(&mux->sq_pkt);
fc_close(&mux->fc);
av_freep(pof);
}
int64_t of_filesize(OutputFile *of)
{
Muxer *mux = mux_from_of(of);
return atomic_load(&mux->last_filesize);
}
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