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fftools/ffmpeg_sched: make sure to always run task cleanup 

Even in cases where sch_start() failed. This ensures all links are
properly closed and no tasks are left hanging.

Fixes #10916.
This commit is contained in:
Anton Khirnov 2024-03-27 09:49:27 +01:00
parent af81788f30
commit 24b9f29ff2
1 changed files with 44 additions and 24 deletions
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68
fftools/ffmpeg_sched.c
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@ -260,6 +260,12 @@ typedef struct SchFilterGraph {
int task_exited;
} SchFilterGraph;
enum SchedulerState {
SCH_STATE_UNINIT,
SCH_STATE_STARTED,
SCH_STATE_STOPPED,
};
struct Scheduler {
const AVClass *class;
@ -292,7 +298,7 @@ struct Scheduler {
char *sdp_filename;
int sdp_auto;
int transcode_started;
enum SchedulerState state;
atomic_int terminate;
atomic_int task_failed;
@ -1144,7 +1150,8 @@ int sch_mux_stream_ready(Scheduler *sch, unsigned mux_idx, unsigned stream_idx)
// this may be called during initialization - do not start
// threads before sch_start() is called
if (++mux->nb_streams_ready == mux->nb_streams && sch->transcode_started)
if (++mux->nb_streams_ready == mux->nb_streams &&
sch->state >= SCH_STATE_STARTED)
ret = mux_init(sch, mux);
pthread_mutex_unlock(&sch->mux_ready_lock);
@ -1514,7 +1521,8 @@ int sch_start(Scheduler *sch)
if (ret < 0)
return ret;
sch->transcode_started = 1;
av_assert0(sch->state == SCH_STATE_UNINIT);
sch->state = SCH_STATE_STARTED;
for (unsigned i = 0; i < sch->nb_mux; i++) {
SchMux *mux = &sch->mux[i];
@ -1522,7 +1530,7 @@ int sch_start(Scheduler *sch)
if (mux->nb_streams_ready == mux->nb_streams) {
ret = mux_init(sch, mux);
if (ret < 0)
return ret;
goto fail;
}
}
@ -1531,7 +1539,7 @@ int sch_start(Scheduler *sch)
ret = task_start(&enc->task);
if (ret < 0)
return ret;
goto fail;
}
for (unsigned i = 0; i < sch->nb_filters; i++) {
@ -1539,7 +1547,7 @@ int sch_start(Scheduler *sch)
ret = task_start(&fg->task);
if (ret < 0)
return ret;
goto fail;
}
for (unsigned i = 0; i < sch->nb_dec; i++) {
@ -1547,7 +1555,7 @@ int sch_start(Scheduler *sch)
ret = task_start(&dec->task);
if (ret < 0)
return ret;
goto fail;
}
for (unsigned i = 0; i < sch->nb_demux; i++) {
@ -1558,7 +1566,7 @@ int sch_start(Scheduler *sch)
ret = task_start(&d->task);
if (ret < 0)
return ret;
goto fail;
}
pthread_mutex_lock(&sch->schedule_lock);
@ -1566,6 +1574,9 @@ int sch_start(Scheduler *sch)
pthread_mutex_unlock(&sch->schedule_lock);
return 0;
fail:
sch_stop(sch, NULL);
return ret;
}
int sch_wait(Scheduler *sch, uint64_t timeout_us, int64_t *transcode_ts)
@ -2412,6 +2423,18 @@ int sch_filter_command(Scheduler *sch, unsigned fg_idx, AVFrame *frame)
return send_to_filter(sch, fg, fg->nb_inputs, frame);
}
static int task_cleanup(Scheduler *sch, SchedulerNode node)
{
switch (node.type) {
case SCH_NODE_TYPE_DEMUX: return demux_done (sch, node.idx);
case SCH_NODE_TYPE_MUX: return mux_done (sch, node.idx);
case SCH_NODE_TYPE_DEC: return dec_done (sch, node.idx);
case SCH_NODE_TYPE_ENC: return enc_done (sch, node.idx);
case SCH_NODE_TYPE_FILTER_IN: return filter_done(sch, node.idx);
default: av_assert0(0);
}
}
static void *task_wrapper(void *arg)
{
SchTask *task = arg;
@ -2424,15 +2447,7 @@ static void *task_wrapper(void *arg)
av_log(task->func_arg, AV_LOG_ERROR,
"Task finished with error code: %d (%s)\n", ret, av_err2str(ret));
switch (task->node.type) {
case SCH_NODE_TYPE_DEMUX: err = demux_done (sch, task->node.idx); break;
case SCH_NODE_TYPE_MUX: err = mux_done (sch, task->node.idx); break;
case SCH_NODE_TYPE_DEC: err = dec_done (sch, task->node.idx); break;
case SCH_NODE_TYPE_ENC: err = enc_done (sch, task->node.idx); break;
case SCH_NODE_TYPE_FILTER_IN: err = filter_done(sch, task->node.idx); break;
default: av_assert0(0);
}
err = task_cleanup(sch, task->node);
ret = err_merge(ret, err);
// EOF is considered normal termination
@ -2448,13 +2463,13 @@ static void *task_wrapper(void *arg)
return (void*)(intptr_t)ret;
}
static int task_stop(SchTask *task)
static int task_stop(Scheduler *sch, SchTask *task)
{
int ret;
void *thread_ret;
if (!task->thread_running)
return 0;
return task_cleanup(sch, task->node);
ret = pthread_join(task->thread, &thread_ret);
av_assert0(ret == 0);
@ -2468,6 +2483,9 @@ int sch_stop(Scheduler *sch, int64_t *finish_ts)
{
int ret = 0, err;
if (sch->state != SCH_STATE_STARTED)
return 0;
atomic_store(&sch->terminate, 1);
for (unsigned type = 0; type < 2; type++)
@ -2479,40 +2497,42 @@ int sch_stop(Scheduler *sch, int64_t *finish_ts)
for (unsigned i = 0; i < sch->nb_demux; i++) {
SchDemux *d = &sch->demux[i];
err = task_stop(&d->task);
err = task_stop(sch, &d->task);
ret = err_merge(ret, err);
}
for (unsigned i = 0; i < sch->nb_dec; i++) {
SchDec *dec = &sch->dec[i];
err = task_stop(&dec->task);
err = task_stop(sch, &dec->task);
ret = err_merge(ret, err);
}
for (unsigned i = 0; i < sch->nb_filters; i++) {
SchFilterGraph *fg = &sch->filters[i];
err = task_stop(&fg->task);
err = task_stop(sch, &fg->task);
ret = err_merge(ret, err);
}
for (unsigned i = 0; i < sch->nb_enc; i++) {
SchEnc *enc = &sch->enc[i];
err = task_stop(&enc->task);
err = task_stop(sch, &enc->task);
ret = err_merge(ret, err);
}
for (unsigned i = 0; i < sch->nb_mux; i++) {
SchMux *mux = &sch->mux[i];
err = task_stop(&mux->task);
err = task_stop(sch, &mux->task);
ret = err_merge(ret, err);
}
if (finish_ts)
*finish_ts = trailing_dts(sch, 1);
sch->state = SCH_STATE_STOPPED;
return ret;
}