staticFrame*frame_queue_peek_readable(FrameQueue*f){/* wait until we have a readable a new frame */SDL_LockMutex(f->mutex);while(f->size<=0&&!f->pktq->abort_request){SDL_CondWait(f->cond,f->mutex);}SDL_UnlockMutex(f->mutex);if(f->pktq->abort_request)returnNULL;return&f->q...
frame_queue_peek_readable:逻辑和frame_queue_peek_writable类似,检查队列是否为空,空则wait;否则返回可读的frame的指针; frame_queue_push:仅仅更新windex和size,因为再使用frame_queue_peek_writable时节点的指针已经移交用户,用户需要将数据存储到其中,这里只需要更新索引即可; frame_queue_next:逻辑与frame_queue_p...
先调用frame_queue_peek_writable 函数获取一个可写节点。 staticFrame*frame_queue_peek_writable(FrameQueue*f){SDL_LockMutex(f->mutex);// 等待,直到队列有空间可写while(f->size>=f->max_size&&!f->pktq->abort_request){SDL_CondWait(f->cond,f->mutex);}SDL_UnlockMutex(f->mutex);// 如果Pa...
frame_queue_peek_readable:这方法和frame_queue_peek的作用一样, 都是获取待显示的第一帧static Frame *frame_queue_peek_readable(FrameQueue *f) { /* wait until we have a readable a new frame */ SDL_LockMutex(f->mutex); while (f->size - f->rindex_shown <= 0 && !f->pktq->abort_...
if (!(f->queue[i].frame = av_frame_alloc())) return AVERROR(ENOMEM); return 0; } //表示从循环队列帧里面取出当前需要显示的一帧视频 staticFrame*frame_queue_peek(FrameQueue*f) { return&f->queue[(f->rindex +f->rindex_shown) %f->max_size]; ...
1,frame_queue_init(),初始化 FrameQueue 的函数。 2,frame_queue_peek_next(),读取当前准备播放的帧的下一个帧。 3,frame_queue_peek_last(),读取上一帧已经播放的Frame ...
!ff_bufqueue_peek(&merge->queue_alpha,0))break; main_buf = ff_bufqueue_get(&merge->queue_main); alpha_buf = ff_bufqueue_get(&merge->queue_alpha); merge->frame_requested =0;draw_frame(ctx, main_buf, alpha_buf); ret = ff_filter_frame(ctx->outputs[0], main_buf); ...
sendQueue = buffer1; locker = buf1Locker; } }else{lock(buf2Locker) { sendQueue = buffer2; locker = buf1Locker; } }// read from buffer and send itwhile(true) {// get the next frame to send and its sizelock(locker) { sendFrame = sendQueue.Peek(); ...
ParameterKeyTunnelPeek ParameterKeyVideoBitrate VideoScalingModeScaleToFit VideoScalingModeScaleToFitWithCropping 屬性 方法 MediaCodec.BufferInfo MediaCodec.Callback MediaCodec.CodecException MediaCodec.CryptoException MediaCodec.CryptoInfo MediaCodec.CryptoInfo.Pattern MediaCodec.FirstTunnelFrameReadyEventArgs MediaCodec.Fr...
MSMQQueue.Peek Call Handles (Windows) Media Control (Windows) Server Core Reference (Windows) Server Core Roles (Windows) C-C++ Code Example: Setting PROPID_Q_QUOTA C-C++ Code Example: Retrieving PROPID_Q_PATHNAME_DNS C-C++ Code Example: Verifying Workgroup Installation HGROUPSETENUM structure (...