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avcodec/frame_thread_encoder: Check initializing mutexes/conditions 

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2021-09-02 14:29:22 +02:00
parent 95b681eafd
commit 754b8454b7
1 changed files with 18 additions and 10 deletions
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28
libavcodec/frame_thread_encoder.c
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@ -29,6 +29,7 @@
#include "libavutil/thread.h"
#include "avcodec.h"
#include "internal.h"
#include "pthread_internal.h"
#include "thread.h"
#define MAX_THREADS 64
@ -52,6 +53,7 @@ typedef struct{
pthread_mutex_t task_fifo_mutex; /* Used to guard (next_)task_index */
pthread_cond_t task_fifo_cond;
unsigned pthread_init_cnt;
unsigned max_tasks;
Task tasks[BUFFER_SIZE];
pthread_mutex_t finished_task_mutex; /* Guards tasks[i].finished */
@ -65,6 +67,12 @@ typedef struct{
atomic_int exit;
} ThreadContext;
#define OFF(member) offsetof(ThreadContext, member)
DEFINE_OFFSET_ARRAY(ThreadContext, thread_ctx, pthread_init_cnt,
(OFF(buffer_mutex), OFF(task_fifo_mutex), OFF(finished_task_mutex)),
(OFF(task_fifo_cond), OFF(finished_task_cond)));
#undef OFF
static void * attribute_align_arg worker(void *v){
AVCodecContext *avctx = v;
ThreadContext *c = avctx->internal->frame_thread_encoder;
@ -127,6 +135,7 @@ int ff_frame_thread_encoder_init(AVCodecContext *avctx)
int i=0;
ThreadContext *c;
AVCodecContext *thread_avctx = NULL;
int ret;
if( !(avctx->thread_type & FF_THREAD_FRAME)
|| !(avctx->codec->capabilities & AV_CODEC_CAP_FRAME_THREADS))
@ -185,11 +194,9 @@ int ff_frame_thread_encoder_init(AVCodecContext *avctx)
c->parent_avctx = avctx;
pthread_mutex_init(&c->task_fifo_mutex, NULL);
pthread_mutex_init(&c->finished_task_mutex, NULL);
pthread_mutex_init(&c->buffer_mutex, NULL);
pthread_cond_init(&c->task_fifo_cond, NULL);
pthread_cond_init(&c->finished_task_cond, NULL);
ret = ff_pthread_init(c, thread_ctx_offsets);
if (ret < 0)
goto fail;
atomic_init(&c->exit, 0);
c->max_tasks = avctx->thread_count + 2;
@ -246,6 +253,10 @@ void ff_frame_thread_encoder_free(AVCodecContext *avctx){
int i;
ThreadContext *c= avctx->internal->frame_thread_encoder;
/* In case initializing the mutexes/condition variables failed,
* they must not be used. In this case the thread_count is zero
* as no thread has been initialized yet. */
if (avctx->thread_count > 0) {
pthread_mutex_lock(&c->task_fifo_mutex);
atomic_store(&c->exit, 1);
pthread_cond_broadcast(&c->task_fifo_cond);
@ -254,17 +265,14 @@ void ff_frame_thread_encoder_free(AVCodecContext *avctx){
for (i=0; i<avctx->thread_count; i++) {
pthread_join(c->worker[i], NULL);
}
}
for (unsigned i = 0; i < c->max_tasks; i++) {
av_frame_free(&c->tasks[i].indata);
av_packet_free(&c->tasks[i].outdata);
}
pthread_mutex_destroy(&c->task_fifo_mutex);
pthread_mutex_destroy(&c->finished_task_mutex);
pthread_mutex_destroy(&c->buffer_mutex);
pthread_cond_destroy(&c->task_fifo_cond);
pthread_cond_destroy(&c->finished_task_cond);
ff_pthread_free(c, thread_ctx_offsets);
av_freep(&avctx->internal->frame_thread_encoder);
}