249     AVBufferPool *pool = av_mallocz(sizeof(*pool));  in av_buffer_pool_init2()  local
250     if (!pool)  in av_buffer_pool_init2()
253     ff_mutex_init(&pool->mutex, NULL);  in av_buffer_pool_init2()
255     pool->size      = size;  in av_buffer_pool_init2()
256     pool->opaque    = opaque;  in av_buffer_pool_init2()
257     pool->alloc2    = alloc;  in av_buffer_pool_init2()
258     pool->alloc     = av_buffer_alloc; // fallback  in av_buffer_pool_init2()
259     pool->pool_free = pool_free;  in av_buffer_pool_init2()
261     atomic_init(&pool->refcount, 1);  in av_buffer_pool_init2()
263     return pool;  in av_buffer_pool_init2()
268     AVBufferPool *pool = av_mallocz(sizeof(*pool));  in av_buffer_pool_init()  local
269     if (!pool)  in av_buffer_pool_init()
272     ff_mutex_init(&pool->mutex, NULL);  in av_buffer_pool_init()
274     pool->size     = size;  in av_buffer_pool_init()
275     pool->alloc    = alloc ? alloc : av_buffer_alloc;  in av_buffer_pool_init()
277     atomic_init(&pool->refcount, 1);  in av_buffer_pool_init()
279     return pool;  in av_buffer_pool_init()
282 static void buffer_pool_flush(AVBufferPool *pool)  in buffer_pool_flush()  argument
284     while (pool->pool) {  in buffer_pool_flush()
285         BufferPoolEntry *buf = pool->pool;  in buffer_pool_flush()
286         pool->pool = buf->next;  in buffer_pool_flush()
294  * This function gets called when the pool has been uninited and
297 static void buffer_pool_free(AVBufferPool *pool)  in buffer_pool_free()  argument
299     buffer_pool_flush(pool);  in buffer_pool_free()
300     ff_mutex_destroy(&pool->mutex);  in buffer_pool_free()
302     if (pool->pool_free)  in buffer_pool_free()
303         pool->pool_free(pool->opaque);  in buffer_pool_free()
305     av_freep(&pool);  in buffer_pool_free()
310     AVBufferPool *pool;  in av_buffer_pool_uninit()  local
314     pool   = *ppool;  in av_buffer_pool_uninit()
317     ff_mutex_lock(&pool->mutex);  in av_buffer_pool_uninit()
318     buffer_pool_flush(pool);  in av_buffer_pool_uninit()
319     ff_mutex_unlock(&pool->mutex);  in av_buffer_pool_uninit()
321     if (atomic_fetch_sub_explicit(&pool->refcount, 1, memory_order_acq_rel) == 1)  in av_buffer_pool_uninit()
322         buffer_pool_free(pool);  in av_buffer_pool_uninit()
328     AVBufferPool *pool = buf->pool;  in pool_release_buffer()  local
331         memset(buf->data, FF_MEMORY_POISON, pool->size);  in pool_release_buffer()
333     ff_mutex_lock(&pool->mutex);  in pool_release_buffer()
334     buf->next = pool->pool;  in pool_release_buffer()
335     pool->pool = buf;  in pool_release_buffer()
336     ff_mutex_unlock(&pool->mutex);  in pool_release_buffer()
338     if (atomic_fetch_sub_explicit(&pool->refcount, 1, memory_order_acq_rel) == 1)  in pool_release_buffer()
339         buffer_pool_free(pool);  in pool_release_buffer()
343  * it is returned to the pool on free */
344 static AVBufferRef *pool_alloc_buffer(AVBufferPool *pool)  in pool_alloc_buffer()  argument
349     av_assert0(pool->alloc || pool->alloc2);  in pool_alloc_buffer()
351     ret = pool->alloc2 ? pool->alloc2(pool->opaque, pool->size) :  in pool_alloc_buffer()
352                          pool->alloc(pool->size);  in pool_alloc_buffer()
365     buf->pool   = pool;  in pool_alloc_buffer()
373 AVBufferRef *av_buffer_pool_get(AVBufferPool *pool)  in av_buffer_pool_get()  argument
378     ff_mutex_lock(&pool->mutex);  in av_buffer_pool_get()
379     buf = pool->pool;  in av_buffer_pool_get()
381         ret = av_buffer_create(buf->data, pool->size, pool_release_buffer,  in av_buffer_pool_get()
384             pool->pool = buf->next;  in av_buffer_pool_get()
388         ret = pool_alloc_buffer(pool);  in av_buffer_pool_get()
390     ff_mutex_unlock(&pool->mutex);  in av_buffer_pool_get()
393         atomic_fetch_add_explicit(&pool->refcount, 1, memory_order_relaxed);  in av_buffer_pool_get()