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FFmpeg/fftools/ffmpeg_demux.c
Marton Balint 4bfecde9b9 fftools/ffmpeg_demux: honor -ch_layout options for overriding input stream channel layout 
The code only set the channel layout of the AVFormatContext, so the user could
not override the channel layout if the demuxer did not have such parameter.

This used to work via the respective AVCodecContext option, but since
639c2f0049 it no longer gets passed to the
decoders. It is actually better if we set it manually, instead of using the
codec option because that way we can also override it on the stream level, so
it will also work for stream copy or bitstream filtering.

We don't allow changing the number of channels, because that can cause
unexpected results. We disable layout guessing, if a channel layout is
specified.

Fixes ticket #11016.

Signed-off-by: Marton Balint <cus@passwd.hu>
2024-05-27 21:46:47 +02:00

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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 <float.h>
#include <stdint.h>
#include "ffmpeg.h"
#include "ffmpeg_sched.h"
#include "ffmpeg_utils.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/display.h"
#include "libavutil/error.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/time.h"
#include "libavutil/timestamp.h"
#include "libavcodec/bsf.h"
#include "libavcodec/packet.h"
#include "libavformat/avformat.h"
typedef struct DemuxStream {
InputStream ist;
// name used for logging
char log_name[32];
int sch_idx_stream;
int sch_idx_dec;
double ts_scale;
/* non zero if the packets must be decoded in 'raw_fifo', see DECODING_FOR_* */
int decoding_needed;
#define DECODING_FOR_OST 1
#define DECODING_FOR_FILTER 2
/* true if stream data should be discarded */
int discard;
// scheduler returned EOF for this stream
int finished;
int streamcopy_needed;
int have_sub2video;
int reinit_filters;
int autorotate;
int wrap_correction_done;
int saw_first_ts;
///< dts of the first packet read for this stream (in AV_TIME_BASE units)
int64_t first_dts;
/* predicted dts of the next packet read for this stream or (when there are
* several frames in a packet) of the next frame in current packet (in AV_TIME_BASE units) */
int64_t next_dts;
///< dts of the last packet read for this stream (in AV_TIME_BASE units)
int64_t dts;
const AVCodecDescriptor *codec_desc;
AVDictionary *decoder_opts;
DecoderOpts dec_opts;
char dec_name[16];
// decoded media properties, as estimated by opening the decoder
AVFrame *decoded_params;
AVBSFContext *bsf;
/* number of packets successfully read for this stream */
uint64_t nb_packets;
// combined size of all the packets read
uint64_t data_size;
} DemuxStream;
typedef struct Demuxer {
InputFile f;
// name used for logging
char log_name[32];
int64_t wallclock_start;
/**
* Extra timestamp offset added by discontinuity handling.
*/
int64_t ts_offset_discont;
int64_t last_ts;
int64_t recording_time;
int accurate_seek;
/* number of times input stream should be looped */
int loop;
int have_audio_dec;
/* duration of the looped segment of the input file */
Timestamp duration;
/* pts with the smallest/largest values ever seen */
Timestamp min_pts;
Timestamp max_pts;
/* number of streams that the user was warned of */
int nb_streams_warn;
float readrate;
double readrate_initial_burst;
Scheduler *sch;
AVPacket *pkt_heartbeat;
int read_started;
int nb_streams_used;
int nb_streams_finished;
} Demuxer;
typedef struct DemuxThreadContext {
// packet used for reading from the demuxer
AVPacket *pkt_demux;
// packet for reading from BSFs
AVPacket *pkt_bsf;
} DemuxThreadContext;
static DemuxStream *ds_from_ist(InputStream *ist)
{
return (DemuxStream*)ist;
}
static Demuxer *demuxer_from_ifile(InputFile *f)
{
return (Demuxer*)f;
}
InputStream *ist_find_unused(enum AVMediaType type)
{
for (InputStream *ist = ist_iter(NULL); ist; ist = ist_iter(ist)) {
DemuxStream *ds = ds_from_ist(ist);
if (ist->par->codec_type == type && ds->discard &&
ist->user_set_discard != AVDISCARD_ALL)
return ist;
}
return NULL;
}
static void report_new_stream(Demuxer *d, const AVPacket *pkt)
{
const AVStream *st = d->f.ctx->streams[pkt->stream_index];
if (pkt->stream_index < d->nb_streams_warn)
return;
av_log(d, AV_LOG_WARNING,
"New %s stream with index %d at pos:%"PRId64" and DTS:%ss\n",
av_get_media_type_string(st->codecpar->codec_type),
pkt->stream_index, pkt->pos, av_ts2timestr(pkt->dts, &st->time_base));
d->nb_streams_warn = pkt->stream_index + 1;
}
static int seek_to_start(Demuxer *d, Timestamp end_pts)
{
InputFile *ifile = &d->f;
AVFormatContext *is = ifile->ctx;
int ret;
ret = avformat_seek_file(is, -1, INT64_MIN, is->start_time, is->start_time, 0);
if (ret < 0)
return ret;
if (end_pts.ts != AV_NOPTS_VALUE &&
(d->max_pts.ts == AV_NOPTS_VALUE ||
av_compare_ts(d->max_pts.ts, d->max_pts.tb, end_pts.ts, end_pts.tb) < 0))
d->max_pts = end_pts;
if (d->max_pts.ts != AV_NOPTS_VALUE) {
int64_t min_pts = d->min_pts.ts == AV_NOPTS_VALUE ? 0 : d->min_pts.ts;
d->duration.ts = d->max_pts.ts - av_rescale_q(min_pts, d->min_pts.tb, d->max_pts.tb);
}
d->duration.tb = d->max_pts.tb;
if (d->loop > 0)
d->loop--;
return ret;
}
static void ts_discontinuity_detect(Demuxer *d, InputStream *ist,
AVPacket *pkt)
{
InputFile *ifile = &d->f;
DemuxStream *ds = ds_from_ist(ist);
const int fmt_is_discont = ifile->ctx->iformat->flags & AVFMT_TS_DISCONT;
int disable_discontinuity_correction = copy_ts;
int64_t pkt_dts = av_rescale_q_rnd(pkt->dts, pkt->time_base, AV_TIME_BASE_Q,
AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX);
if (copy_ts && ds->next_dts != AV_NOPTS_VALUE &&
fmt_is_discont && ist->st->pts_wrap_bits < 60) {
int64_t wrap_dts = av_rescale_q_rnd(pkt->dts + (1LL<<ist->st->pts_wrap_bits),
pkt->time_base, AV_TIME_BASE_Q,
AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
if (FFABS(wrap_dts - ds->next_dts) < FFABS(pkt_dts - ds->next_dts)/10)
disable_discontinuity_correction = 0;
}
if (ds->next_dts != AV_NOPTS_VALUE && !disable_discontinuity_correction) {
int64_t delta = pkt_dts - ds->next_dts;
if (fmt_is_discont) {
if (FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE ||
pkt_dts + AV_TIME_BASE/10 < ds->dts) {
d->ts_offset_discont -= delta;
av_log(ist, AV_LOG_WARNING,
"timestamp discontinuity "
"(stream id=%d): %"PRId64", new offset= %"PRId64"\n",
ist->st->id, delta, d->ts_offset_discont);
pkt->dts -= av_rescale_q(delta, AV_TIME_BASE_Q, pkt->time_base);
if (pkt->pts != AV_NOPTS_VALUE)
pkt->pts -= av_rescale_q(delta, AV_TIME_BASE_Q, pkt->time_base);
}
} else {
if (FFABS(delta) > 1LL * dts_error_threshold * AV_TIME_BASE) {
av_log(NULL, AV_LOG_WARNING,
"DTS %"PRId64", next:%"PRId64" st:%d invalid dropping\n",
pkt->dts, ds->next_dts, pkt->stream_index);
pkt->dts = AV_NOPTS_VALUE;
}
if (pkt->pts != AV_NOPTS_VALUE){
int64_t pkt_pts = av_rescale_q(pkt->pts, pkt->time_base, AV_TIME_BASE_Q);
delta = pkt_pts - ds->next_dts;
if (FFABS(delta) > 1LL * dts_error_threshold * AV_TIME_BASE) {
av_log(NULL, AV_LOG_WARNING,
"PTS %"PRId64", next:%"PRId64" invalid dropping st:%d\n",
pkt->pts, ds->next_dts, pkt->stream_index);
pkt->pts = AV_NOPTS_VALUE;
}
}
}
} else if (ds->next_dts == AV_NOPTS_VALUE && !copy_ts &&
fmt_is_discont && d->last_ts != AV_NOPTS_VALUE) {
int64_t delta = pkt_dts - d->last_ts;
if (FFABS(delta) > 1LL * dts_delta_threshold * AV_TIME_BASE) {
d->ts_offset_discont -= delta;
av_log(NULL, AV_LOG_DEBUG,
"Inter stream timestamp discontinuity %"PRId64", new offset= %"PRId64"\n",
delta, d->ts_offset_discont);
pkt->dts -= av_rescale_q(delta, AV_TIME_BASE_Q, pkt->time_base);
if (pkt->pts != AV_NOPTS_VALUE)
pkt->pts -= av_rescale_q(delta, AV_TIME_BASE_Q, pkt->time_base);
}
}
d->last_ts = av_rescale_q(pkt->dts, pkt->time_base, AV_TIME_BASE_Q);
}
static void ts_discontinuity_process(Demuxer *d, InputStream *ist,
AVPacket *pkt)
{
int64_t offset = av_rescale_q(d->ts_offset_discont, AV_TIME_BASE_Q,
pkt->time_base);
// apply previously-detected timestamp-discontinuity offset
// (to all streams, not just audio/video)
if (pkt->dts != AV_NOPTS_VALUE)
pkt->dts += offset;
if (pkt->pts != AV_NOPTS_VALUE)
pkt->pts += offset;
// detect timestamp discontinuities for audio/video
if ((ist->par->codec_type == AVMEDIA_TYPE_VIDEO ||
ist->par->codec_type == AVMEDIA_TYPE_AUDIO) &&
pkt->dts != AV_NOPTS_VALUE)
ts_discontinuity_detect(d, ist, pkt);
}
static int ist_dts_update(DemuxStream *ds, AVPacket *pkt, FrameData *fd)
{
InputStream *ist = &ds->ist;
const AVCodecParameters *par = ist->par;
if (!ds->saw_first_ts) {
ds->first_dts =
ds->dts = ist->st->avg_frame_rate.num ? - ist->par->video_delay * AV_TIME_BASE / av_q2d(ist->st->avg_frame_rate) : 0;
if (pkt->pts != AV_NOPTS_VALUE) {
ds->first_dts =
ds->dts += av_rescale_q(pkt->pts, pkt->time_base, AV_TIME_BASE_Q);
}
ds->saw_first_ts = 1;
}
if (ds->next_dts == AV_NOPTS_VALUE)
ds->next_dts = ds->dts;
if (pkt->dts != AV_NOPTS_VALUE)
ds->next_dts = ds->dts = av_rescale_q(pkt->dts, pkt->time_base, AV_TIME_BASE_Q);
ds->dts = ds->next_dts;
switch (par->codec_type) {
case AVMEDIA_TYPE_AUDIO:
av_assert1(pkt->duration >= 0);
if (par->sample_rate) {
ds->next_dts += ((int64_t)AV_TIME_BASE * par->frame_size) /
par->sample_rate;
} else {
ds->next_dts += av_rescale_q(pkt->duration, pkt->time_base, AV_TIME_BASE_Q);
}
break;
case AVMEDIA_TYPE_VIDEO:
if (ist->framerate.num) {
// TODO: Remove work-around for c99-to-c89 issue 7
AVRational time_base_q = AV_TIME_BASE_Q;
int64_t next_dts = av_rescale_q(ds->next_dts, time_base_q, av_inv_q(ist->framerate));
ds->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
} else if (pkt->duration) {
ds->next_dts += av_rescale_q(pkt->duration, pkt->time_base, AV_TIME_BASE_Q);
} else if (ist->par->framerate.num != 0) {
AVRational field_rate = av_mul_q(ist->par->framerate,
(AVRational){ 2, 1 });
int fields = 2;
if (ds->codec_desc &&
(ds->codec_desc->props & AV_CODEC_PROP_FIELDS) &&
av_stream_get_parser(ist->st))
fields = 1 + av_stream_get_parser(ist->st)->repeat_pict;
ds->next_dts += av_rescale_q(fields, av_inv_q(field_rate), AV_TIME_BASE_Q);
}
break;
}
fd->dts_est = ds->dts;
return 0;
}
static int ts_fixup(Demuxer *d, AVPacket *pkt, FrameData *fd)
{
InputFile *ifile = &d->f;
InputStream *ist = ifile->streams[pkt->stream_index];
DemuxStream *ds = ds_from_ist(ist);
const int64_t start_time = ifile->start_time_effective;
int64_t duration;
int ret;
pkt->time_base = ist->st->time_base;
#define SHOW_TS_DEBUG(tag_) \
if (debug_ts) { \
av_log(ist, AV_LOG_INFO, "%s -> ist_index:%d:%d type:%s " \
"pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s duration:%s duration_time:%s\n", \
tag_, ifile->index, pkt->stream_index, \
av_get_media_type_string(ist->st->codecpar->codec_type), \
av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &pkt->time_base), \
av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &pkt->time_base), \
av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &pkt->time_base)); \
}
SHOW_TS_DEBUG("demuxer");
if (!ds->wrap_correction_done && start_time != AV_NOPTS_VALUE &&
ist->st->pts_wrap_bits < 64) {
int64_t stime, stime2;
stime = av_rescale_q(start_time, AV_TIME_BASE_Q, pkt->time_base);
stime2= stime + (1ULL<<ist->st->pts_wrap_bits);
ds->wrap_correction_done = 1;
if(stime2 > stime && pkt->dts != AV_NOPTS_VALUE && pkt->dts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
pkt->dts -= 1ULL<<ist->st->pts_wrap_bits;
ds->wrap_correction_done = 0;
}
if(stime2 > stime && pkt->pts != AV_NOPTS_VALUE && pkt->pts > stime + (1LL<<(ist->st->pts_wrap_bits-1))) {
pkt->pts -= 1ULL<<ist->st->pts_wrap_bits;
ds->wrap_correction_done = 0;
}
}
if (pkt->dts != AV_NOPTS_VALUE)
pkt->dts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, pkt->time_base);
if (pkt->pts != AV_NOPTS_VALUE)
pkt->pts += av_rescale_q(ifile->ts_offset, AV_TIME_BASE_Q, pkt->time_base);
if (pkt->pts != AV_NOPTS_VALUE)
pkt->pts *= ds->ts_scale;
if (pkt->dts != AV_NOPTS_VALUE)
pkt->dts *= ds->ts_scale;
duration = av_rescale_q(d->duration.ts, d->duration.tb, pkt->time_base);
if (pkt->pts != AV_NOPTS_VALUE) {
// audio decoders take precedence for estimating total file duration
int64_t pkt_duration = d->have_audio_dec ? 0 : pkt->duration;
pkt->pts += duration;
// update max/min pts that will be used to compute total file duration
// when using -stream_loop
if (d->max_pts.ts == AV_NOPTS_VALUE ||
av_compare_ts(d->max_pts.ts, d->max_pts.tb,
pkt->pts + pkt_duration, pkt->time_base) < 0) {
d->max_pts = (Timestamp){ .ts = pkt->pts + pkt_duration,
.tb = pkt->time_base };
}
if (d->min_pts.ts == AV_NOPTS_VALUE ||
av_compare_ts(d->min_pts.ts, d->min_pts.tb,
pkt->pts, pkt->time_base) > 0) {
d->min_pts = (Timestamp){ .ts = pkt->pts,
.tb = pkt->time_base };
}
}
if (pkt->dts != AV_NOPTS_VALUE)
pkt->dts += duration;
SHOW_TS_DEBUG("demuxer+tsfixup");
// detect and try to correct for timestamp discontinuities
ts_discontinuity_process(d, ist, pkt);
// update estimated/predicted dts
ret = ist_dts_update(ds, pkt, fd);
if (ret < 0)
return ret;
return 0;
}
static int input_packet_process(Demuxer *d, AVPacket *pkt, unsigned *send_flags)
{
InputFile *f = &d->f;
InputStream *ist = f->streams[pkt->stream_index];
DemuxStream *ds = ds_from_ist(ist);
FrameData *fd;
int ret = 0;
fd = packet_data(pkt);
if (!fd)
return AVERROR(ENOMEM);
ret = ts_fixup(d, pkt, fd);
if (ret < 0)
return ret;
if (d->recording_time != INT64_MAX) {
int64_t start_time = 0;
if (copy_ts) {
start_time += f->start_time != AV_NOPTS_VALUE ? f->start_time : 0;
start_time += start_at_zero ? 0 : f->start_time_effective;
}
if (ds->dts >= d->recording_time + start_time)
*send_flags |= DEMUX_SEND_STREAMCOPY_EOF;
}
ds->data_size += pkt->size;
ds->nb_packets++;
fd->wallclock[LATENCY_PROBE_DEMUX] = av_gettime_relative();
if (debug_ts) {
av_log(NULL, AV_LOG_INFO, "demuxer+ffmpeg -> ist_index:%d:%d type:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s duration:%s duration_time:%s off:%s off_time:%s\n",
f->index, pkt->stream_index,
av_get_media_type_string(ist->par->codec_type),
av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &pkt->time_base),
av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &pkt->time_base),
av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &pkt->time_base),
av_ts2str(f->ts_offset), av_ts2timestr(f->ts_offset, &AV_TIME_BASE_Q));
}
return 0;
}
static void readrate_sleep(Demuxer *d)
{
InputFile *f = &d->f;
int64_t file_start = copy_ts * (
(f->start_time_effective != AV_NOPTS_VALUE ? f->start_time_effective * !start_at_zero : 0) +
(f->start_time != AV_NOPTS_VALUE ? f->start_time : 0)
);
int64_t burst_until = AV_TIME_BASE * d->readrate_initial_burst;
for (int i = 0; i < f->nb_streams; i++) {
InputStream *ist = f->streams[i];
DemuxStream *ds = ds_from_ist(ist);
int64_t stream_ts_offset, pts, now;
stream_ts_offset = FFMAX(ds->first_dts != AV_NOPTS_VALUE ? ds->first_dts : 0, file_start);
pts = av_rescale(ds->dts, 1000000, AV_TIME_BASE);
now = (av_gettime_relative() - d->wallclock_start) * d->readrate + stream_ts_offset;
if (pts - burst_until > now)
av_usleep(pts - burst_until - now);
}
}
static int do_send(Demuxer *d, DemuxStream *ds, AVPacket *pkt, unsigned flags,
const char *pkt_desc)
{
int ret;
pkt->stream_index = ds->sch_idx_stream;
ret = sch_demux_send(d->sch, d->f.index, pkt, flags);
if (ret == AVERROR_EOF) {
av_packet_unref(pkt);
av_log(ds, AV_LOG_VERBOSE, "All consumers of this stream are done\n");
ds->finished = 1;
if (++d->nb_streams_finished == d->nb_streams_used) {
av_log(d, AV_LOG_VERBOSE, "All consumers are done\n");
return AVERROR_EOF;
}
} else if (ret < 0) {
if (ret != AVERROR_EXIT)
av_log(d, AV_LOG_ERROR,
"Unable to send %s packet to consumers: %s\n",
pkt_desc, av_err2str(ret));
return ret;
}
return 0;
}
static int demux_send(Demuxer *d, DemuxThreadContext *dt, DemuxStream *ds,
AVPacket *pkt, unsigned flags)
{
InputFile *f = &d->f;
int ret;
// pkt can be NULL only when flushing BSFs
av_assert0(ds->bsf || pkt);
// send heartbeat for sub2video streams
if (d->pkt_heartbeat && pkt && pkt->pts != AV_NOPTS_VALUE) {
for (int i = 0; i < f->nb_streams; i++) {
DemuxStream *ds1 = ds_from_ist(f->streams[i]);
if (ds1->finished || !ds1->have_sub2video)
continue;
d->pkt_heartbeat->pts = pkt->pts;
d->pkt_heartbeat->time_base = pkt->time_base;
d->pkt_heartbeat->opaque = (void*)(intptr_t)PKT_OPAQUE_SUB_HEARTBEAT;
ret = do_send(d, ds1, d->pkt_heartbeat, 0, "heartbeat");
if (ret < 0)
return ret;
}
}
if (ds->bsf) {
if (pkt)
av_packet_rescale_ts(pkt, pkt->time_base, ds->bsf->time_base_in);
ret = av_bsf_send_packet(ds->bsf, pkt);
if (ret < 0) {
if (pkt)
av_packet_unref(pkt);
av_log(ds, AV_LOG_ERROR, "Error submitting a packet for filtering: %s\n",
av_err2str(ret));
return ret;
}
while (1) {
ret = av_bsf_receive_packet(ds->bsf, dt->pkt_bsf);
if (ret == AVERROR(EAGAIN))
return 0;
else if (ret < 0) {
if (ret != AVERROR_EOF)
av_log(ds, AV_LOG_ERROR,
"Error applying bitstream filters to a packet: %s\n",
av_err2str(ret));
return ret;
}
dt->pkt_bsf->time_base = ds->bsf->time_base_out;
ret = do_send(d, ds, dt->pkt_bsf, 0, "filtered");
if (ret < 0) {
av_packet_unref(dt->pkt_bsf);
return ret;
}
}
} else {
ret = do_send(d, ds, pkt, flags, "demuxed");
if (ret < 0)
return ret;
}
return 0;
}
static int demux_bsf_flush(Demuxer *d, DemuxThreadContext *dt)
{
InputFile *f = &d->f;
int ret;
for (unsigned i = 0; i < f->nb_streams; i++) {
DemuxStream *ds = ds_from_ist(f->streams[i]);
if (!ds->bsf)
continue;
ret = demux_send(d, dt, ds, NULL, 0);
ret = (ret == AVERROR_EOF) ? 0 : (ret < 0) ? ret : AVERROR_BUG;
if (ret < 0) {
av_log(ds, AV_LOG_ERROR, "Error flushing BSFs: %s\n",
av_err2str(ret));
return ret;
}
av_bsf_flush(ds->bsf);
}
return 0;
}
static void discard_unused_programs(InputFile *ifile)
{
for (int j = 0; j < ifile->ctx->nb_programs; j++) {
AVProgram *p = ifile->ctx->programs[j];
int discard = AVDISCARD_ALL;
for (int k = 0; k < p->nb_stream_indexes; k++) {
DemuxStream *ds = ds_from_ist(ifile->streams[p->stream_index[k]]);
if (!ds->discard) {
discard = AVDISCARD_DEFAULT;
break;
}
}
p->discard = discard;
}
}
static void thread_set_name(InputFile *f)
{
char name[16];
snprintf(name, sizeof(name), "dmx%d:%s", f->index, f->ctx->iformat->name);
ff_thread_setname(name);
}
static void demux_thread_uninit(DemuxThreadContext *dt)
{
av_packet_free(&dt->pkt_demux);
av_packet_free(&dt->pkt_bsf);
memset(dt, 0, sizeof(*dt));
}
static int demux_thread_init(DemuxThreadContext *dt)
{
memset(dt, 0, sizeof(*dt));
dt->pkt_demux = av_packet_alloc();
if (!dt->pkt_demux)
return AVERROR(ENOMEM);
dt->pkt_bsf = av_packet_alloc();
if (!dt->pkt_bsf)
return AVERROR(ENOMEM);
return 0;
}
static int input_thread(void *arg)
{
Demuxer *d = arg;
InputFile *f = &d->f;
DemuxThreadContext dt;
int ret = 0;
ret = demux_thread_init(&dt);
if (ret < 0)
goto finish;
thread_set_name(f);
discard_unused_programs(f);
d->read_started = 1;
d->wallclock_start = av_gettime_relative();
while (1) {
DemuxStream *ds;
unsigned send_flags = 0;
ret = av_read_frame(f->ctx, dt.pkt_demux);
if (ret == AVERROR(EAGAIN)) {
av_usleep(10000);
continue;
}
if (ret < 0) {
int ret_bsf;
if (ret == AVERROR_EOF)
av_log(d, AV_LOG_VERBOSE, "EOF while reading input\n");
else {
av_log(d, AV_LOG_ERROR, "Error during demuxing: %s\n",
av_err2str(ret));
ret = exit_on_error ? ret : 0;
}
ret_bsf = demux_bsf_flush(d, &dt);
ret = err_merge(ret == AVERROR_EOF ? 0 : ret, ret_bsf);
if (d->loop) {
/* signal looping to our consumers */
dt.pkt_demux->stream_index = -1;
ret = sch_demux_send(d->sch, f->index, dt.pkt_demux, 0);
if (ret >= 0)
ret = seek_to_start(d, (Timestamp){ .ts = dt.pkt_demux->pts,
.tb = dt.pkt_demux->time_base });
if (ret >= 0)
continue;
/* fallthrough to the error path */
}
break;
}
if (do_pkt_dump) {
av_pkt_dump_log2(NULL, AV_LOG_INFO, dt.pkt_demux, do_hex_dump,
f->ctx->streams[dt.pkt_demux->stream_index]);
}
/* the following test is needed in case new streams appear
dynamically in stream : we ignore them */
ds = dt.pkt_demux->stream_index < f->nb_streams ?
ds_from_ist(f->streams[dt.pkt_demux->stream_index]) : NULL;
if (!ds || ds->discard || ds->finished) {
report_new_stream(d, dt.pkt_demux);
av_packet_unref(dt.pkt_demux);
continue;
}
if (dt.pkt_demux->flags & AV_PKT_FLAG_CORRUPT) {
av_log(d, exit_on_error ? AV_LOG_FATAL : AV_LOG_WARNING,
"corrupt input packet in stream %d\n",
dt.pkt_demux->stream_index);
if (exit_on_error) {
av_packet_unref(dt.pkt_demux);
ret = AVERROR_INVALIDDATA;
break;
}
}
ret = input_packet_process(d, dt.pkt_demux, &send_flags);
if (ret < 0)
break;
if (d->readrate)
readrate_sleep(d);
ret = demux_send(d, &dt, ds, dt.pkt_demux, send_flags);
if (ret < 0)
break;
}
// EOF/EXIT is normal termination
if (ret == AVERROR_EOF || ret == AVERROR_EXIT)
ret = 0;
finish:
demux_thread_uninit(&dt);
return ret;
}
static void demux_final_stats(Demuxer *d)
{
InputFile *f = &d->f;
uint64_t total_packets = 0, total_size = 0;
av_log(f, AV_LOG_VERBOSE, "Input file #%d (%s):\n",
f->index, f->ctx->url);
for (int j = 0; j < f->nb_streams; j++) {
InputStream *ist = f->streams[j];
DemuxStream *ds = ds_from_ist(ist);
enum AVMediaType type = ist->par->codec_type;
if (ds->discard || type == AVMEDIA_TYPE_ATTACHMENT)
continue;
total_size += ds->data_size;
total_packets += ds->nb_packets;
av_log(f, AV_LOG_VERBOSE, " Input stream #%d:%d (%s): ",
f->index, j, av_get_media_type_string(type));
av_log(f, AV_LOG_VERBOSE, "%"PRIu64" packets read (%"PRIu64" bytes); ",
ds->nb_packets, ds->data_size);
if (ds->decoding_needed) {
av_log(f, AV_LOG_VERBOSE,
"%"PRIu64" frames decoded; %"PRIu64" decode errors",
ist->decoder->frames_decoded, ist->decoder->decode_errors);
if (type == AVMEDIA_TYPE_AUDIO)
av_log(f, AV_LOG_VERBOSE, " (%"PRIu64" samples)", ist->decoder->samples_decoded);
av_log(f, AV_LOG_VERBOSE, "; ");
}
av_log(f, AV_LOG_VERBOSE, "\n");
}
av_log(f, AV_LOG_VERBOSE, " Total: %"PRIu64" packets (%"PRIu64" bytes) demuxed\n",
total_packets, total_size);
}
static void ist_free(InputStream **pist)
{
InputStream *ist = *pist;
DemuxStream *ds;
if (!ist)
return;
ds = ds_from_ist(ist);
dec_free(&ist->decoder);
av_dict_free(&ds->decoder_opts);
av_freep(&ist->filters);
av_freep(&ist->outputs);
av_freep(&ds->dec_opts.hwaccel_device);
avcodec_parameters_free(&ist->par);
av_frame_free(&ds->decoded_params);
av_bsf_free(&ds->bsf);
av_freep(pist);
}
void ifile_close(InputFile **pf)
{
InputFile *f = *pf;
Demuxer *d = demuxer_from_ifile(f);
if (!f)
return;
if (d->read_started)
demux_final_stats(d);
for (int i = 0; i < f->nb_streams; i++)
ist_free(&f->streams[i]);
av_freep(&f->streams);
avformat_close_input(&f->ctx);
av_packet_free(&d->pkt_heartbeat);
av_freep(pf);
}
static int ist_use(InputStream *ist, int decoding_needed)
{
Demuxer *d = demuxer_from_ifile(ist->file);
DemuxStream *ds = ds_from_ist(ist);
int ret;
if (ist->user_set_discard == AVDISCARD_ALL) {
av_log(ist, AV_LOG_ERROR, "Cannot %s a disabled input stream\n",
decoding_needed ? "decode" : "streamcopy");
return AVERROR(EINVAL);
}
if (decoding_needed && !ist->dec) {
av_log(ist, AV_LOG_ERROR,
"Decoding requested, but no decoder found for: %s\n",
avcodec_get_name(ist->par->codec_id));
return AVERROR(EINVAL);
}
if (ds->sch_idx_stream < 0) {
ret = sch_add_demux_stream(d->sch, d->f.index);
if (ret < 0)
return ret;
ds->sch_idx_stream = ret;
}
if (ds->discard) {
ds->discard = 0;
d->nb_streams_used++;
}
ist->st->discard = ist->user_set_discard;
ds->decoding_needed |= decoding_needed;
ds->streamcopy_needed |= !decoding_needed;
if (decoding_needed && ds->sch_idx_dec < 0) {
int is_audio = ist->st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
ds->dec_opts.flags |= (!!ist->fix_sub_duration * DECODER_FLAG_FIX_SUB_DURATION) |
(!!(d->f.ctx->iformat->flags & AVFMT_NOTIMESTAMPS) * DECODER_FLAG_TS_UNRELIABLE) |
(!!(d->loop && is_audio) * DECODER_FLAG_SEND_END_TS)
#if FFMPEG_OPT_TOP
| ((ist->top_field_first >= 0) * DECODER_FLAG_TOP_FIELD_FIRST)
#endif
;
if (ist->framerate.num) {
ds->dec_opts.flags |= DECODER_FLAG_FRAMERATE_FORCED;
ds->dec_opts.framerate = ist->framerate;
} else
ds->dec_opts.framerate = ist->st->avg_frame_rate;
if (ist->dec->id == AV_CODEC_ID_DVB_SUBTITLE &&
(ds->decoding_needed & DECODING_FOR_OST)) {
av_dict_set(&ds->decoder_opts, "compute_edt", "1", AV_DICT_DONT_OVERWRITE);
if (ds->decoding_needed & DECODING_FOR_FILTER)
av_log(ist, AV_LOG_WARNING,
"Warning using DVB subtitles for filtering and output at the "
"same time is not fully supported, also see -compute_edt [0|1]\n");
}
snprintf(ds->dec_name, sizeof(ds->dec_name), "%d:%d", ist->file->index, ist->index);
ds->dec_opts.name = ds->dec_name;
ds->dec_opts.codec = ist->dec;
ds->dec_opts.par = ist->par;
ds->dec_opts.log_parent = ist;
ds->decoded_params = av_frame_alloc();
if (!ds->decoded_params)
return AVERROR(ENOMEM);
ret = dec_init(&ist->decoder, d->sch,
&ds->decoder_opts, &ds->dec_opts, ds->decoded_params);
if (ret < 0)
return ret;
ds->sch_idx_dec = ret;
ret = sch_connect(d->sch, SCH_DSTREAM(d->f.index, ds->sch_idx_stream),
SCH_DEC(ds->sch_idx_dec));
if (ret < 0)
return ret;
d->have_audio_dec |= is_audio;
}
return 0;
}
int ist_output_add(InputStream *ist, OutputStream *ost)
{
DemuxStream *ds = ds_from_ist(ist);
int ret;
ret = ist_use(ist, ost->enc ? DECODING_FOR_OST : 0);
if (ret < 0)
return ret;
ret = GROW_ARRAY(ist->outputs, ist->nb_outputs);
if (ret < 0)
return ret;
ist->outputs[ist->nb_outputs - 1] = ost;
return ost->enc ? ds->sch_idx_dec : ds->sch_idx_stream;
}
int ist_filter_add(InputStream *ist, InputFilter *ifilter, int is_simple,
InputFilterOptions *opts)
{
Demuxer *d = demuxer_from_ifile(ist->file);
DemuxStream *ds = ds_from_ist(ist);
int64_t tsoffset = 0;
int ret;
ret = ist_use(ist, is_simple ? DECODING_FOR_OST : DECODING_FOR_FILTER);
if (ret < 0)
return ret;
ret = GROW_ARRAY(ist->filters, ist->nb_filters);
if (ret < 0)
return ret;
ist->filters[ist->nb_filters - 1] = ifilter;
if (ist->par->codec_type == AVMEDIA_TYPE_VIDEO) {
if (ist->framerate.num > 0 && ist->framerate.den > 0) {
opts->framerate = ist->framerate;
opts->flags |= IFILTER_FLAG_CFR;
} else
opts->framerate = av_guess_frame_rate(d->f.ctx, ist->st, NULL);
} else if (ist->par->codec_type == AVMEDIA_TYPE_SUBTITLE) {
/* Compute the size of the canvas for the subtitles stream.
If the subtitles codecpar has set a size, use it. Otherwise use the
maximum dimensions of the video streams in the same file. */
opts->sub2video_width = ist->par->width;
opts->sub2video_height = ist->par->height;
if (!(opts->sub2video_width && opts->sub2video_height)) {
for (int j = 0; j < d->f.nb_streams; j++) {
AVCodecParameters *par1 = d->f.streams[j]->par;
if (par1->codec_type == AVMEDIA_TYPE_VIDEO) {
opts->sub2video_width = FFMAX(opts->sub2video_width, par1->width);
opts->sub2video_height = FFMAX(opts->sub2video_height, par1->height);
}
}
}
if (!(opts->sub2video_width && opts->sub2video_height)) {
opts->sub2video_width = FFMAX(opts->sub2video_width, 720);
opts->sub2video_height = FFMAX(opts->sub2video_height, 576);
}
if (!d->pkt_heartbeat) {
d->pkt_heartbeat = av_packet_alloc();
if (!d->pkt_heartbeat)
return AVERROR(ENOMEM);
}
ds->have_sub2video = 1;
}
ret = av_frame_copy_props(opts->fallback, ds->decoded_params);
if (ret < 0)
return ret;
opts->fallback->format = ds->decoded_params->format;
opts->fallback->width = ds->decoded_params->width;
opts->fallback->height = ds->decoded_params->height;
ret = av_channel_layout_copy(&opts->fallback->ch_layout, &ds->decoded_params->ch_layout);
if (ret < 0)
return ret;
if (copy_ts) {
tsoffset = d->f.start_time == AV_NOPTS_VALUE ? 0 : d->f.start_time;
if (!start_at_zero && d->f.ctx->start_time != AV_NOPTS_VALUE)
tsoffset += d->f.ctx->start_time;
}
opts->trim_start_us = ((d->f.start_time == AV_NOPTS_VALUE) || !d->accurate_seek) ?
AV_NOPTS_VALUE : tsoffset;
opts->trim_end_us = d->recording_time;
opts->name = av_strdup(ds->dec_name);
if (!opts->name)
return AVERROR(ENOMEM);
opts->flags |= IFILTER_FLAG_AUTOROTATE * !!(ds->autorotate) |
IFILTER_FLAG_REINIT * !!(ds->reinit_filters);
return ds->sch_idx_dec;
}
static int choose_decoder(const OptionsContext *o, AVFormatContext *s, AVStream *st,
enum HWAccelID hwaccel_id, enum AVHWDeviceType hwaccel_device_type,
const AVCodec **pcodec)
{
char *codec_name = NULL;
MATCH_PER_STREAM_OPT(codec_names, str, codec_name, s, st);
if (codec_name) {
int ret = find_codec(NULL, codec_name, st->codecpar->codec_type, 0, pcodec);
if (ret < 0)
return ret;
st->codecpar->codec_id = (*pcodec)->id;
if (recast_media && st->codecpar->codec_type != (*pcodec)->type)
st->codecpar->codec_type = (*pcodec)->type;
return 0;
} else {
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
hwaccel_id == HWACCEL_GENERIC &&
hwaccel_device_type != AV_HWDEVICE_TYPE_NONE) {
const AVCodec *c;
void *i = NULL;
while ((c = av_codec_iterate(&i))) {
const AVCodecHWConfig *config;
if (c->id != st->codecpar->codec_id ||
!av_codec_is_decoder(c))
continue;
for (int j = 0; config = avcodec_get_hw_config(c, j); j++) {
if (config->device_type == hwaccel_device_type) {
av_log(NULL, AV_LOG_VERBOSE, "Selecting decoder '%s' because of requested hwaccel method %s\n",
c->name, av_hwdevice_get_type_name(hwaccel_device_type));
*pcodec = c;
return 0;
}
}
}
}
*pcodec = avcodec_find_decoder(st->codecpar->codec_id);
return 0;
}
}
static int guess_input_channel_layout(InputStream *ist, AVCodecParameters *par,
int guess_layout_max)
{
if (par->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC) {
char layout_name[256];
if (par->ch_layout.nb_channels > guess_layout_max)
return 0;
av_channel_layout_default(&par->ch_layout, par->ch_layout.nb_channels);
if (par->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC)
return 0;
av_channel_layout_describe(&par->ch_layout, layout_name, sizeof(layout_name));
av_log(ist, AV_LOG_WARNING, "Guessed Channel Layout: %s\n", layout_name);
}
return 1;
}
static int add_display_matrix_to_stream(const OptionsContext *o,
AVFormatContext *ctx, InputStream *ist)
{
AVStream *st = ist->st;
AVPacketSideData *sd;
double rotation = DBL_MAX;
int hflip = -1, vflip = -1;
int hflip_set = 0, vflip_set = 0, rotation_set = 0;
int32_t *buf;
MATCH_PER_STREAM_OPT(display_rotations, dbl, rotation, ctx, st);
MATCH_PER_STREAM_OPT(display_hflips, i, hflip, ctx, st);
MATCH_PER_STREAM_OPT(display_vflips, i, vflip, ctx, st);
rotation_set = rotation != DBL_MAX;
hflip_set = hflip != -1;
vflip_set = vflip != -1;
if (!rotation_set && !hflip_set && !vflip_set)
return 0;
sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
&st->codecpar->nb_coded_side_data,
AV_PKT_DATA_DISPLAYMATRIX,
sizeof(int32_t) * 9, 0);
if (!sd) {
av_log(ist, AV_LOG_FATAL, "Failed to generate a display matrix!\n");
return AVERROR(ENOMEM);
}
buf = (int32_t *)sd->data;
av_display_rotation_set(buf,
rotation_set ? -(rotation) : -0.0f);
av_display_matrix_flip(buf,
hflip_set ? hflip : 0,
vflip_set ? vflip : 0);
return 0;
}
static const char *input_stream_item_name(void *obj)
{
const DemuxStream *ds = obj;
return ds->log_name;
}
static const AVClass input_stream_class = {
.class_name = "InputStream",
.version = LIBAVUTIL_VERSION_INT,
.item_name = input_stream_item_name,
.category = AV_CLASS_CATEGORY_DEMUXER,
};
static DemuxStream *demux_stream_alloc(Demuxer *d, AVStream *st)
{
const char *type_str = av_get_media_type_string(st->codecpar->codec_type);
InputFile *f = &d->f;
DemuxStream *ds;
ds = allocate_array_elem(&f->streams, sizeof(*ds), &f->nb_streams);
if (!ds)
return NULL;
ds->sch_idx_stream = -1;
ds->sch_idx_dec = -1;
ds->ist.st = st;
ds->ist.file = f;
ds->ist.index = st->index;
ds->ist.class = &input_stream_class;
snprintf(ds->log_name, sizeof(ds->log_name), "%cist#%d:%d/%s",
type_str ? *type_str : '?', d->f.index, st->index,
avcodec_get_name(st->codecpar->codec_id));
return ds;
}
static int ist_add(const OptionsContext *o, Demuxer *d, AVStream *st)
{
AVFormatContext *ic = d->f.ctx;
AVCodecParameters *par = st->codecpar;
DemuxStream *ds;
InputStream *ist;
char *framerate = NULL, *hwaccel_device = NULL;
const char *hwaccel = NULL;
char *hwaccel_output_format = NULL;
char *codec_tag = NULL;
char *bsfs = NULL;
char *next;
char *discard_str = NULL;
int ret;
ds = demux_stream_alloc(d, st);
if (!ds)
return AVERROR(ENOMEM);
ist = &ds->ist;
ds->discard = 1;
st->discard = AVDISCARD_ALL;
ds->first_dts = AV_NOPTS_VALUE;
ds->next_dts = AV_NOPTS_VALUE;
ds->dec_opts.time_base = st->time_base;
ds->ts_scale = 1.0;
MATCH_PER_STREAM_OPT(ts_scale, dbl, ds->ts_scale, ic, st);
ds->autorotate = 1;
MATCH_PER_STREAM_OPT(autorotate, i, ds->autorotate, ic, st);
MATCH_PER_STREAM_OPT(codec_tags, str, codec_tag, ic, st);
if (codec_tag) {
uint32_t tag = strtol(codec_tag, &next, 0);
if (*next) {
uint8_t buf[4] = { 0 };
memcpy(buf, codec_tag, FFMIN(sizeof(buf), strlen(codec_tag)));
tag = AV_RL32(buf);
}
st->codecpar->codec_tag = tag;
}
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
ret = add_display_matrix_to_stream(o, ic, ist);
if (ret < 0)
return ret;
MATCH_PER_STREAM_OPT(hwaccels, str, hwaccel, ic, st);
MATCH_PER_STREAM_OPT(hwaccel_output_formats, str,
hwaccel_output_format, ic, st);
if (!hwaccel_output_format && hwaccel && !strcmp(hwaccel, "cuvid")) {
av_log(ist, AV_LOG_WARNING,
"WARNING: defaulting hwaccel_output_format to cuda for compatibility "
"with old commandlines. This behaviour is DEPRECATED and will be removed "
"in the future. Please explicitly set \"-hwaccel_output_format cuda\".\n");
ds->dec_opts.hwaccel_output_format = AV_PIX_FMT_CUDA;
} else if (!hwaccel_output_format && hwaccel && !strcmp(hwaccel, "qsv")) {
av_log(ist, AV_LOG_WARNING,
"WARNING: defaulting hwaccel_output_format to qsv for compatibility "
"with old commandlines. This behaviour is DEPRECATED and will be removed "
"in the future. Please explicitly set \"-hwaccel_output_format qsv\".\n");
ds->dec_opts.hwaccel_output_format = AV_PIX_FMT_QSV;
} else if (!hwaccel_output_format && hwaccel && !strcmp(hwaccel, "mediacodec")) {
// There is no real AVHWFrameContext implementation. Set
// hwaccel_output_format to avoid av_hwframe_transfer_data error.
ds->dec_opts.hwaccel_output_format = AV_PIX_FMT_MEDIACODEC;
} else if (hwaccel_output_format) {
ds->dec_opts.hwaccel_output_format = av_get_pix_fmt(hwaccel_output_format);
if (ds->dec_opts.hwaccel_output_format == AV_PIX_FMT_NONE) {
av_log(ist, AV_LOG_FATAL, "Unrecognised hwaccel output "
"format: %s", hwaccel_output_format);
}
} else {
ds->dec_opts.hwaccel_output_format = AV_PIX_FMT_NONE;
}
if (hwaccel) {
// The NVDEC hwaccels use a CUDA device, so remap the name here.
if (!strcmp(hwaccel, "nvdec") || !strcmp(hwaccel, "cuvid"))
hwaccel = "cuda";
if (!strcmp(hwaccel, "none"))
ds->dec_opts.hwaccel_id = HWACCEL_NONE;
else if (!strcmp(hwaccel, "auto"))
ds->dec_opts.hwaccel_id = HWACCEL_AUTO;
else {
enum AVHWDeviceType type = av_hwdevice_find_type_by_name(hwaccel);
if (type != AV_HWDEVICE_TYPE_NONE) {
ds->dec_opts.hwaccel_id = HWACCEL_GENERIC;
ds->dec_opts.hwaccel_device_type = type;
}
if (!ds->dec_opts.hwaccel_id) {
av_log(ist, AV_LOG_FATAL, "Unrecognized hwaccel: %s.\n",
hwaccel);
av_log(ist, AV_LOG_FATAL, "Supported hwaccels: ");
type = AV_HWDEVICE_TYPE_NONE;
while ((type = av_hwdevice_iterate_types(type)) !=
AV_HWDEVICE_TYPE_NONE)
av_log(ist, AV_LOG_FATAL, "%s ",
av_hwdevice_get_type_name(type));
av_log(ist, AV_LOG_FATAL, "\n");
return AVERROR(EINVAL);
}
}
}
MATCH_PER_STREAM_OPT(hwaccel_devices, str, hwaccel_device, ic, st);
if (hwaccel_device) {
ds->dec_opts.hwaccel_device = av_strdup(hwaccel_device);
if (!ds->dec_opts.hwaccel_device)
return AVERROR(ENOMEM);
}
}
ret = choose_decoder(o, ic, st, ds->dec_opts.hwaccel_id,
ds->dec_opts.hwaccel_device_type, &ist->dec);
if (ret < 0)
return ret;
if (ist->dec) {
ret = filter_codec_opts(o->g->codec_opts, ist->st->codecpar->codec_id,
ic, st, ist->dec, &ds->decoder_opts);
if (ret < 0)
return ret;
}
ds->reinit_filters = -1;
MATCH_PER_STREAM_OPT(reinit_filters, i, ds->reinit_filters, ic, st);
ist->user_set_discard = AVDISCARD_NONE;
if ((o->video_disable && ist->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) ||
(o->audio_disable && ist->st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) ||
(o->subtitle_disable && ist->st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE) ||
(o->data_disable && ist->st->codecpar->codec_type == AVMEDIA_TYPE_DATA))
ist->user_set_discard = AVDISCARD_ALL;
MATCH_PER_STREAM_OPT(discard, str, discard_str, ic, st);
if (discard_str) {
ret = av_opt_set(ist->st, "discard", discard_str, 0);
if (ret < 0) {
av_log(ist, AV_LOG_ERROR, "Error parsing discard %s.\n", discard_str);
return ret;
}
ist->user_set_discard = ist->st->discard;
}
ds->dec_opts.flags |= DECODER_FLAG_BITEXACT * !!o->bitexact;
/* Attached pics are sparse, therefore we would not want to delay their decoding
* till EOF. */
if (ist->st->disposition & AV_DISPOSITION_ATTACHED_PIC)
av_dict_set(&ds->decoder_opts, "thread_type", "-frame", 0);
switch (par->codec_type) {
case AVMEDIA_TYPE_VIDEO:
MATCH_PER_STREAM_OPT(frame_rates, str, framerate, ic, st);
if (framerate) {
ret = av_parse_video_rate(&ist->framerate, framerate);
if (ret < 0) {
av_log(ist, AV_LOG_ERROR, "Error parsing framerate %s.\n",
framerate);
return ret;
}
}
#if FFMPEG_OPT_TOP
ist->top_field_first = -1;
MATCH_PER_STREAM_OPT(top_field_first, i, ist->top_field_first, ic, st);
#endif
break;
case AVMEDIA_TYPE_AUDIO: {
char *ch_layout_str = NULL;
MATCH_PER_STREAM_OPT(audio_ch_layouts, str, ch_layout_str, ic, st);
if (ch_layout_str) {
AVChannelLayout ch_layout;
ret = av_channel_layout_from_string(&ch_layout, ch_layout_str);
if (ret < 0) {
av_log(ist, AV_LOG_ERROR, "Error parsing channel layout %s.\n", ch_layout_str);
return ret;
}
if (par->ch_layout.nb_channels <= 0 || par->ch_layout.nb_channels == ch_layout.nb_channels) {
av_channel_layout_uninit(&par->ch_layout);
par->ch_layout = ch_layout;
} else {
av_log(ist, AV_LOG_ERROR,
"Specified channel layout '%s' has %d channels, but input has %d channels.\n",
ch_layout_str, ch_layout.nb_channels, par->ch_layout.nb_channels);
av_channel_layout_uninit(&ch_layout);
return AVERROR(EINVAL);
}
} else {
int guess_layout_max = INT_MAX;
MATCH_PER_STREAM_OPT(guess_layout_max, i, guess_layout_max, ic, st);
guess_input_channel_layout(ist, par, guess_layout_max);
}
break;
}
case AVMEDIA_TYPE_DATA:
case AVMEDIA_TYPE_SUBTITLE: {
char *canvas_size = NULL;
MATCH_PER_STREAM_OPT(fix_sub_duration, i, ist->fix_sub_duration, ic, st);
MATCH_PER_STREAM_OPT(canvas_sizes, str, canvas_size, ic, st);
if (canvas_size) {
ret = av_parse_video_size(&par->width, &par->height,
canvas_size);
if (ret < 0) {
av_log(ist, AV_LOG_FATAL, "Invalid canvas size: %s.\n", canvas_size);
return ret;
}
}
break;
}
case AVMEDIA_TYPE_ATTACHMENT:
case AVMEDIA_TYPE_UNKNOWN:
break;
default: av_assert0(0);
}
ist->par = avcodec_parameters_alloc();
if (!ist->par)
return AVERROR(ENOMEM);
ret = avcodec_parameters_copy(ist->par, par);
if (ret < 0) {
av_log(ist, AV_LOG_ERROR, "Error exporting stream parameters.\n");
return ret;
}
if (ist->st->sample_aspect_ratio.num)
ist->par->sample_aspect_ratio = ist->st->sample_aspect_ratio;
MATCH_PER_STREAM_OPT(bitstream_filters, str, bsfs, ic, st);
if (bsfs) {
ret = av_bsf_list_parse_str(bsfs, &ds->bsf);
if (ret < 0) {
av_log(ist, AV_LOG_ERROR,
"Error parsing bitstream filter sequence '%s': %s\n",
bsfs, av_err2str(ret));
return ret;
}
ret = avcodec_parameters_copy(ds->bsf->par_in, ist->par);
if (ret < 0)
return ret;
ds->bsf->time_base_in = ist->st->time_base;
ret = av_bsf_init(ds->bsf);
if (ret < 0) {
av_log(ist, AV_LOG_ERROR, "Error initializing bitstream filters: %s\n",
av_err2str(ret));
return ret;
}
ret = avcodec_parameters_copy(ist->par, ds->bsf->par_out);
if (ret < 0)
return ret;
}
ds->codec_desc = avcodec_descriptor_get(ist->par->codec_id);
return 0;
}
static int dump_attachment(InputStream *ist, const char *filename)
{
AVStream *st = ist->st;
int ret;
AVIOContext *out = NULL;
const AVDictionaryEntry *e;
if (!st->codecpar->extradata_size) {
av_log(ist, AV_LOG_WARNING, "No extradata to dump.\n");
return 0;
}
if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
filename = e->value;
if (!*filename) {
av_log(ist, AV_LOG_FATAL, "No filename specified and no 'filename' tag");
return AVERROR(EINVAL);
}
ret = assert_file_overwrite(filename);
if (ret < 0)
return ret;
if ((ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &int_cb, NULL)) < 0) {
av_log(ist, AV_LOG_FATAL, "Could not open file %s for writing.\n",
filename);
return ret;
}
avio_write(out, st->codecpar->extradata, st->codecpar->extradata_size);
ret = avio_close(out);
if (ret >= 0)
av_log(ist, AV_LOG_INFO, "Wrote attachment (%d bytes) to '%s'\n",
st->codecpar->extradata_size, filename);
return ret;
}
static const char *input_file_item_name(void *obj)
{
const Demuxer *d = obj;
return d->log_name;
}
static const AVClass input_file_class = {
.class_name = "InputFile",
.version = LIBAVUTIL_VERSION_INT,
.item_name = input_file_item_name,
.category = AV_CLASS_CATEGORY_DEMUXER,
};
static Demuxer *demux_alloc(void)
{
Demuxer *d = allocate_array_elem(&input_files, sizeof(*d), &nb_input_files);
if (!d)
return NULL;
d->f.class = &input_file_class;
d->f.index = nb_input_files - 1;
snprintf(d->log_name, sizeof(d->log_name), "in#%d", d->f.index);
return d;
}
int ifile_open(const OptionsContext *o, const char *filename, Scheduler *sch)
{
Demuxer *d;
InputFile *f;
AVFormatContext *ic;
const AVInputFormat *file_iformat = NULL;
int err, i, ret = 0;
int64_t timestamp;
AVDictionary *unused_opts = NULL;
const AVDictionaryEntry *e = NULL;
const char* video_codec_name = NULL;
const char* audio_codec_name = NULL;
const char* subtitle_codec_name = NULL;
const char* data_codec_name = NULL;
int scan_all_pmts_set = 0;
int64_t start_time = o->start_time;
int64_t start_time_eof = o->start_time_eof;
int64_t stop_time = o->stop_time;
int64_t recording_time = o->recording_time;
d = demux_alloc();
if (!d)
return AVERROR(ENOMEM);
f = &d->f;
ret = sch_add_demux(sch, input_thread, d);
if (ret < 0)
return ret;
d->sch = sch;
if (stop_time != INT64_MAX && recording_time != INT64_MAX) {
stop_time = INT64_MAX;
av_log(d, AV_LOG_WARNING, "-t and -to cannot be used together; using -t.\n");
}
if (stop_time != INT64_MAX && recording_time == INT64_MAX) {
int64_t start = start_time == AV_NOPTS_VALUE ? 0 : start_time;
if (stop_time <= start) {
av_log(d, AV_LOG_ERROR, "-to value smaller than -ss; aborting.\n");
return AVERROR(EINVAL);
} else {
recording_time = stop_time - start;
}
}
if (o->format) {
if (!(file_iformat = av_find_input_format(o->format))) {
av_log(d, AV_LOG_FATAL, "Unknown input format: '%s'\n", o->format);
return AVERROR(EINVAL);
}
}
if (!strcmp(filename, "-"))
filename = "fd:";
stdin_interaction &= strncmp(filename, "pipe:", 5) &&
strcmp(filename, "fd:") &&
strcmp(filename, "/dev/stdin");
/* get default parameters from command line */
ic = avformat_alloc_context();
if (!ic)
return AVERROR(ENOMEM);
if (o->audio_sample_rate.nb_opt) {
av_dict_set_int(&o->g->format_opts, "sample_rate", o->audio_sample_rate.opt[o->audio_sample_rate.nb_opt - 1].u.i, 0);
}
if (o->audio_channels.nb_opt) {
const AVClass *priv_class;
if (file_iformat && (priv_class = file_iformat->priv_class) &&
av_opt_find(&priv_class, "ch_layout", NULL, 0,
AV_OPT_SEARCH_FAKE_OBJ)) {
char buf[32];
snprintf(buf, sizeof(buf), "%dC", o->audio_channels.opt[o->audio_channels.nb_opt - 1].u.i);
av_dict_set(&o->g->format_opts, "ch_layout", buf, 0);
}
}
if (o->audio_ch_layouts.nb_opt) {
const AVClass *priv_class;
if (file_iformat && (priv_class = file_iformat->priv_class) &&
av_opt_find(&priv_class, "ch_layout", NULL, 0,
AV_OPT_SEARCH_FAKE_OBJ)) {
av_dict_set(&o->g->format_opts, "ch_layout", o->audio_ch_layouts.opt[o->audio_ch_layouts.nb_opt - 1].u.str, 0);
}
}
if (o->frame_rates.nb_opt) {
const AVClass *priv_class;
/* set the format-level framerate option;
* this is important for video grabbers, e.g. x11 */
if (file_iformat && (priv_class = file_iformat->priv_class) &&
av_opt_find(&priv_class, "framerate", NULL, 0,
AV_OPT_SEARCH_FAKE_OBJ)) {
av_dict_set(&o->g->format_opts, "framerate",
o->frame_rates.opt[o->frame_rates.nb_opt - 1].u.str, 0);
}
}
if (o->frame_sizes.nb_opt) {
av_dict_set(&o->g->format_opts, "video_size", o->frame_sizes.opt[o->frame_sizes.nb_opt - 1].u.str, 0);
}
if (o->frame_pix_fmts.nb_opt)
av_dict_set(&o->g->format_opts, "pixel_format", o->frame_pix_fmts.opt[o->frame_pix_fmts.nb_opt - 1].u.str, 0);
video_codec_name = opt_match_per_type_str(&o->codec_names, 'v');
audio_codec_name = opt_match_per_type_str(&o->codec_names, 'a');
subtitle_codec_name = opt_match_per_type_str(&o->codec_names, 's');
data_codec_name = opt_match_per_type_str(&o->codec_names, 'd');
if (video_codec_name)
ret = err_merge(ret, find_codec(NULL, video_codec_name , AVMEDIA_TYPE_VIDEO , 0,
&ic->video_codec));
if (audio_codec_name)
ret = err_merge(ret, find_codec(NULL, audio_codec_name , AVMEDIA_TYPE_AUDIO , 0,
&ic->audio_codec));
if (subtitle_codec_name)
ret = err_merge(ret, find_codec(NULL, subtitle_codec_name, AVMEDIA_TYPE_SUBTITLE, 0,
&ic->subtitle_codec));
if (data_codec_name)
ret = err_merge(ret, find_codec(NULL, data_codec_name , AVMEDIA_TYPE_DATA, 0,
&ic->data_codec));
if (ret < 0) {
avformat_free_context(ic);
return ret;
}
ic->video_codec_id = video_codec_name ? ic->video_codec->id : AV_CODEC_ID_NONE;
ic->audio_codec_id = audio_codec_name ? ic->audio_codec->id : AV_CODEC_ID_NONE;
ic->subtitle_codec_id = subtitle_codec_name ? ic->subtitle_codec->id : AV_CODEC_ID_NONE;
ic->data_codec_id = data_codec_name ? ic->data_codec->id : AV_CODEC_ID_NONE;
ic->flags |= AVFMT_FLAG_NONBLOCK;
if (o->bitexact)
ic->flags |= AVFMT_FLAG_BITEXACT;
ic->interrupt_callback = int_cb;
if (!av_dict_get(o->g->format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE)) {
av_dict_set(&o->g->format_opts, "scan_all_pmts", "1", AV_DICT_DONT_OVERWRITE);
scan_all_pmts_set = 1;
}
/* open the input file with generic avformat function */
err = avformat_open_input(&ic, filename, file_iformat, &o->g->format_opts);
if (err < 0) {
av_log(d, AV_LOG_ERROR,
"Error opening input: %s\n", av_err2str(err));
if (err == AVERROR_PROTOCOL_NOT_FOUND)
av_log(d, AV_LOG_ERROR, "Did you mean file:%s?\n", filename);
return err;
}
f->ctx = ic;
av_strlcat(d->log_name, "/", sizeof(d->log_name));
av_strlcat(d->log_name, ic->iformat->name, sizeof(d->log_name));
if (scan_all_pmts_set)
av_dict_set(&o->g->format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE);
remove_avoptions(&o->g->format_opts, o->g->codec_opts);
ret = check_avoptions(o->g->format_opts);
if (ret < 0)
return ret;
/* apply forced codec ids */
for (i = 0; i < ic->nb_streams; i++) {
const AVCodec *dummy;
ret = choose_decoder(o, ic, ic->streams[i], HWACCEL_NONE, AV_HWDEVICE_TYPE_NONE,
&dummy);
if (ret < 0)
return ret;
}
if (o->find_stream_info) {
AVDictionary **opts;
int orig_nb_streams = ic->nb_streams;
ret = setup_find_stream_info_opts(ic, o->g->codec_opts, &opts);
if (ret < 0)
return ret;
/* If not enough info to get the stream parameters, we decode the
first frames to get it. (used in mpeg case for example) */
ret = avformat_find_stream_info(ic, opts);
for (i = 0; i < orig_nb_streams; i++)
av_dict_free(&opts[i]);
av_freep(&opts);
if (ret < 0) {
av_log(d, AV_LOG_FATAL, "could not find codec parameters\n");
if (ic->nb_streams == 0)
return ret;
}
}
if (start_time != AV_NOPTS_VALUE && start_time_eof != AV_NOPTS_VALUE) {
av_log(d, AV_LOG_WARNING, "Cannot use -ss and -sseof both, using -ss\n");
start_time_eof = AV_NOPTS_VALUE;
}
if (start_time_eof != AV_NOPTS_VALUE) {
if (start_time_eof >= 0) {
av_log(d, AV_LOG_ERROR, "-sseof value must be negative; aborting\n");
return AVERROR(EINVAL);
}
if (ic->duration > 0) {
start_time = start_time_eof + ic->duration;
if (start_time < 0) {
av_log(d, AV_LOG_WARNING, "-sseof value seeks to before start of file; ignored\n");
start_time = AV_NOPTS_VALUE;
}
} else
av_log(d, AV_LOG_WARNING, "Cannot use -sseof, file duration not known\n");
}
timestamp = (start_time == AV_NOPTS_VALUE) ? 0 : start_time;
/* add the stream start time */
if (!o->seek_timestamp && ic->start_time != AV_NOPTS_VALUE)
timestamp += ic->start_time;
/* if seeking requested, we execute it */
if (start_time != AV_NOPTS_VALUE) {
int64_t seek_timestamp = timestamp;
if (!(ic->iformat->flags & AVFMT_SEEK_TO_PTS)) {
int dts_heuristic = 0;
for (i=0; i<ic->nb_streams; i++) {
const AVCodecParameters *par = ic->streams[i]->codecpar;
if (par->video_delay) {
dts_heuristic = 1;
break;
}
}
if (dts_heuristic) {
seek_timestamp -= 3*AV_TIME_BASE / 23;
}
}
ret = avformat_seek_file(ic, -1, INT64_MIN, seek_timestamp, seek_timestamp, 0);
if (ret < 0) {
av_log(d, AV_LOG_WARNING, "could not seek to position %0.3f\n",
(double)timestamp / AV_TIME_BASE);
}
}
f->start_time = start_time;
d->recording_time = recording_time;
f->input_sync_ref = o->input_sync_ref;
f->input_ts_offset = o->input_ts_offset;
f->ts_offset = o->input_ts_offset - (copy_ts ? (start_at_zero && ic->start_time != AV_NOPTS_VALUE ? ic->start_time : 0) : timestamp);
d->accurate_seek = o->accurate_seek;
d->loop = o->loop;
d->nb_streams_warn = ic->nb_streams;
d->duration = (Timestamp){ .ts = 0, .tb = (AVRational){ 1, 1 } };
d->min_pts = (Timestamp){ .ts = AV_NOPTS_VALUE, .tb = (AVRational){ 1, 1 } };
d->max_pts = (Timestamp){ .ts = AV_NOPTS_VALUE, .tb = (AVRational){ 1, 1 } };
d->readrate = o->readrate ? o->readrate : 0.0;
if (d->readrate < 0.0f) {
av_log(d, AV_LOG_ERROR, "Option -readrate is %0.3f; it must be non-negative.\n", d->readrate);
return AVERROR(EINVAL);
}
if (o->rate_emu) {
if (d->readrate) {
av_log(d, AV_LOG_WARNING, "Both -readrate and -re set. Using -readrate %0.3f.\n", d->readrate);
} else
d->readrate = 1.0f;
}
if (d->readrate) {
d->readrate_initial_burst = o->readrate_initial_burst ? o->readrate_initial_burst : 0.5;
if (d->readrate_initial_burst < 0.0) {
av_log(d, AV_LOG_ERROR,
"Option -readrate_initial_burst is %0.3f; it must be non-negative.\n",
d->readrate_initial_burst);
return AVERROR(EINVAL);
}
} else if (o->readrate_initial_burst) {
av_log(d, AV_LOG_WARNING, "Option -readrate_initial_burst ignored "
"since neither -readrate nor -re were given\n");
}
/* Add all the streams from the given input file to the demuxer */
for (int i = 0; i < ic->nb_streams; i++) {
ret = ist_add(o, d, ic->streams[i]);
if (ret < 0)
return ret;
}
/* dump the file content */
av_dump_format(ic, f->index, filename, 0);
/* check if all codec options have been used */
unused_opts = strip_specifiers(o->g->codec_opts);
for (i = 0; i < f->nb_streams; i++) {
DemuxStream *ds = ds_from_ist(f->streams[i]);
e = NULL;
while ((e = av_dict_iterate(ds->decoder_opts, e)))
av_dict_set(&unused_opts, e->key, NULL, 0);
}
e = NULL;
while ((e = av_dict_iterate(unused_opts, e))) {
const AVClass *class = avcodec_get_class();
const AVOption *option = av_opt_find(&class, e->key, NULL, 0,
AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ);
const AVClass *fclass = avformat_get_class();
const AVOption *foption = av_opt_find(&fclass, e->key, NULL, 0,
AV_OPT_SEARCH_CHILDREN | AV_OPT_SEARCH_FAKE_OBJ);
if (!option || foption)
continue;
if (!(option->flags & AV_OPT_FLAG_DECODING_PARAM)) {
av_log(d, AV_LOG_ERROR, "Codec AVOption %s (%s) is not a decoding "
"option.\n", e->key, option->help ? option->help : "");
return AVERROR(EINVAL);
}
av_log(d, AV_LOG_WARNING, "Codec AVOption %s (%s) has not been used "
"for any stream. The most likely reason is either wrong type "
"(e.g. a video option with no video streams) or that it is a "
"private option of some decoder which was not actually used "
"for any stream.\n", e->key, option->help ? option->help : "");
}
av_dict_free(&unused_opts);
for (i = 0; i < o->dump_attachment.nb_opt; i++) {
int j;
for (j = 0; j < f->nb_streams; j++) {
InputStream *ist = f->streams[j];
if (check_stream_specifier(ic, ist->st, o->dump_attachment.opt[i].specifier) == 1) {
ret = dump_attachment(ist, o->dump_attachment.opt[i].u.str);
if (ret < 0)
return ret;
}
}
}
return 0;
}
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