struct pm_qos_request latency_pm_qos_req; /* pm_qos request */ size_t buffer_bytes_max; /* limit ring buffer size */ struct snd_dma_buffer dma_buffer; size_t dma_max; /* -- hardware operations -- */ const struct snd_pcm_ops *ops; /* -- runtime information -- */ struct s...
与ASIO的交互是通过AsioDriverListener接口的一个实例完成的。ASIO主机将在每次希望回放新样本时调用其void bufferSwitch(long sampleTime, long samplePosition, Set<AsioChannel> activeChannels)方法。如果我想输出单声道声音,我只需在activeChannels的所有通道中写入相同的数据。但是,如果我想做更复杂的事情,因此需要知道...
For example Mpeg 1 used 12 frames in an ipbbpbbpbbpb GOP (group of pictures) arrangement where i is an 'intra' frame which is effectively a jpeg still, a p is a predictive frame which encodes some movements between i and p frames, and b frames encode some spot fixu...
How to encode data from device with dma buffer fd? #118 opened Apr 28, 2022 by yueyihua Cannot find a proper format for codec ‘h264’ (id 28), pixel format ‘none’ #116 opened Apr 20, 2022 by ljr0683 Unable to compile ffmpeg in new l4t 34.1 ubuntu 20.04 #115 opened Apr...
支持rockchip mpp硬件加速编解码的ffmpeg版本。Forked ffmpeg that supports rkmpp decodeing, encoding and rga scaling - ffmpeg-rk/libavrkmpp/rkmppdec.c at 4718c2b965ef8a9e915d5a2a58af39094b3353dc · jjm2473/ffmpeg-rk
ffplay是一个不错的播放器,是基于多线程实现的,播放视频时一般至少有4个线程:读包线程、视频解码线程、音频解码线程、视频渲染线程。如果需要多路播放时,线程不可避免的有点多,比如需要播放8路视频时则需要32个线程,这样对性能的消耗还是比较大的。于是想到用单线程实现一个播放器,经过实践发现是可行的,播放本地文...
• Intel® Processor Graphics • 3D 渲染(OpenGL Vulkan) • Media • 显示与计算(CUDA OpenCL) Intel GPU media 硬件编程模型 CPU GPU FFmpeg slice slice MSDK data EU sampler i965/iHD EU EU s EU d OS scheduler n a EU IEF AVS VME 3D m m o c KMD DMA Ring buffer command decode...
1- First, I configure TPG and framebuffer write, I use mmap and I write data to IPs regs, then I start them. 2- I create a stream connected to a pipe running ffmpeg command (pipeout = popen("ffmpeg -f rawvideo -i pipe:0 ...) 3- I mmap the video fr...
Zero-copy DMA in above stages How to use The documentation is available on theWikipage of this project. Codecs and filters Decoders/Hwaccel V... av1_rkmpp Rockchip MPP (Media Process Platform) AV1 decoder (codec av1) V... h263_rkmpp Rockchip MPP (Media Process Platform) H263 decoder...
dma_buffer_t*dma_buffers;intfd;#defineDMA_BUFFER_NUM (6)#defineCLEAR(x) (memset(&(x), 0, sizeof(x)))staticvoidthread_cleanup(void*arg) {inti =0;enumv4l2_buf_type type =V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; ioctl(fd, VIDIOC_STREAMOFF,&type); ...