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fftools/ffmpeg: add thread-aware transcode scheduling infrastructure

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See the comment block at the top of fftools/ffmpeg_sched.h for more
details on what this scheduler is for.

This commit adds the scheduling code itself, along with minimal
integration with the rest of the program:
* allocating and freeing the scheduler
* passing it throughout the call stack in order to register the
  individual components (demuxers/decoders/filtergraphs/encoders/muxers)
  with the scheduler

The scheduler is not actually used as of this commit, so it should not
result in any change in behavior. That will change in future commits.
This commit is contained in:
Anton Khirnov
2023-05-18 16:56:15 +02:00
parent ee2a8cbfd1
commit 9b8cc36ce0
13 changed files with 2936 additions and 56 deletions
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18
fftools/ffmpeg.c
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@ -99,6 +99,7 @@
#include "cmdutils.h"
#include "ffmpeg.h"
#include "ffmpeg_sched.h"
#include "ffmpeg_utils.h"
#include "sync_queue.h"
@ -1167,7 +1168,7 @@ static int transcode_step(OutputStream *ost, AVPacket *demux_pkt)
/*
* The following code is the main loop of the file converter
*/
static int transcode(int *err_rate_exceeded)
static int transcode(Scheduler *sch, int *err_rate_exceeded)
{
int ret = 0, i;
InputStream *ist;
@ -1305,6 +1306,8 @@ static int64_t getmaxrss(void)
int main(int argc, char **argv)
{
Scheduler *sch = NULL;
int ret, err_rate_exceeded;
BenchmarkTimeStamps ti;
@ -1322,8 +1325,14 @@ int main(int argc, char **argv)
show_banner(argc, argv, options);
sch = sch_alloc();
if (!sch) {
ret = AVERROR(ENOMEM);
goto finish;
}
/* parse options and open all input/output files */
ret = ffmpeg_parse_options(argc, argv);
ret = ffmpeg_parse_options(argc, argv, sch);
if (ret < 0)
goto finish;
@ -1341,7 +1350,7 @@ int main(int argc, char **argv)
}
current_time = ti = get_benchmark_time_stamps();
ret = transcode(&err_rate_exceeded);
ret = transcode(sch, &err_rate_exceeded);
if (ret >= 0 && do_benchmark) {
int64_t utime, stime, rtime;
current_time = get_benchmark_time_stamps();
@ -1361,5 +1370,8 @@ finish:
ret = 0;
ffmpeg_cleanup(ret);
sch_free(&sch);
return ret;
}