Code: Select all

#include <fstream>
#include <iostream>
#include <functional>
#include <linux/videodev2.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <string.h>
#include <vector>
#include <stdexcept>
#include <cerrno>
std::vector<char> readBytesFromFile(std::string filePath, size_t maxCount) {
 std::ifstream file(filePath, std::ios::binary);
 if (!file) {
 throw std::runtime_error("Failed to read file");
 }
 std::vector<char> buffer(maxCount);
 file.read(buffer.data(), buffer.size());
 std::streamsize bytesRead = file.gcount();
 buffer.resize(bytesRead);
 return buffer;
}
int main() { 
 std::vector<char> hevc = readBytesFromFile("/home/openup/source.h265", 4096);
 int hevc_byte_count = hevc.size();
 std::cout << "Read " << hevc_byte_count << " bytes" << std::endl;
 int fd = open("/dev/video19", O_RDWR);
 if (fd < 0) {
 throw std::runtime_error("Failed to open device");
 }
 struct v4l2_capability capability;
 if (ioctl(fd, VIDIOC_QUERYCAP, &capability) < 0) {
 std::perror("Failed to query capabilities");
 return 1;
 }
 std::cout << "Card: " << capability.card << std::endl;
 struct v4l2_format encodedFormat = {};
 encodedFormat.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 encodedFormat.fmt.pix_mp.pixelformat = V4L2_PIX_FMT_HEVC_SLICE;
 encodedFormat.fmt.pix_mp.field = V4L2_FIELD_NONE;
 encodedFormat.fmt.pix_mp.plane_fmt[0].sizeimage = hevc_byte_count;
 encodedFormat.fmt.pix_mp.num_planes = 1;
 encodedFormat.fmt.pix.bytesperline = hevc_byte_count;
 if (ioctl(fd, VIDIOC_S_FMT, &encodedFormat) < 0) {
 std::perror("Failed to set encoded format");
 return 1;
 }
 struct v4l2_buffer v4l2_buf = {};
 struct v4l2_plane planes[1] = {};
 struct timeval timestamp = {};
 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 v4l2_buf.memory = V4L2_MEMORY_USERPTR;
 v4l2_buf.timestamp = timestamp;
 v4l2_buf.length = 1;
 v4l2_buf.m.planes = planes;
 planes[0].m.userptr = reinterpret_cast<unsigned long>(hevc.data());
 planes[0].length = hevc_byte_count;
 planes[0].bytesused = hevc_byte_count;
 if (ioctl(fd, VIDIOC_QBUF, &v4l2_buf)) {
 std::perror("Failed to queue buffer");
 return 1;
 }
 std::cout << "Successfully queued buffer" << std::endl;
 return 0;
}

Code: Select all

$ v4l2-ctl --dev /dev/video19 --all
Driver Info:
 Driver name : rpivid
 Card type : rpivid
 Bus info : platform:rpivid
 Driver version : 6.6.62
 Capabilities : 0x84204000
 Video Memory-to-Memory Multiplanar
 Streaming
 Extended Pix Format
 Device Capabilities
 Device Caps : 0x04204000
 Video Memory-to-Memory Multiplanar
 Streaming
 Extended Pix Format
Media Driver Info:
 Driver name : rpivid
 Model : rpivid
 Serial : 
 Bus info : platform:rpivid
 Media version : 6.6.62
 Hardware revision: 0x00000000 (0)
 Driver version : 6.6.62
Interface Info:
 ID : 0x0300000c
 Type : V4L Video
Entity Info:
 ID : 0x00000001 (1)
 Name : rpivid-source
 Function : V4L2 I/O
 Pad 0x01000002 : 0: Source
 Link 0x02000008: to remote pad 0x1000004 of entity 'rpivid-proc' (Video Decoder): Data, Enabled, Immutable
Priority: 2
Format Video Capture Multiplanar:
 Width/Height : 1920/1088
 Pixel Format : 'NC12' (Y/CbCr 4:2:0 (128b cols))
 Field : None
 Number of planes : 1
 Flags : 
 Colorspace : Default
 Transfer Function : Default
 YCbCr/HSV Encoding: Default
 Quantization : Default
 Plane 0 :
 Bytes per Line : 1632
 Size Image : 3133440
Format Video Output Multiplanar:
 Width/Height : 1920/1088
 Pixel Format : 'S265' (HEVC Parsed Slice Data)
 Field : None
 Number of planes : 1
 Flags : 
 Colorspace : Default
 Transfer Function : Default
 YCbCr/HSV Encoding: Default
 Quantization : Default
 Plane 0 :
 Bytes per Line : 0
 Size Image : 4096
Stateless Codec Controls
 hevc_sequence_parameter_set 0x00a40a90 (unknown): type=270 value=unsupported payload type flags=has-payload
 hevc_picture_parameter_set 0x00a40a91 (unknown): type=271 value=unsupported payload type flags=has-payload
 slice_param_array 0x00a40a92 (unknown): type=272 dims=[4096] flags=has-payload, 0x00000800
 hevc_scaling_matrix 0x00a40a93 (unknown): type=273 value=unsupported payload type flags=has-payload
 hevc_decode_parameters 0x00a40a94 (unknown): type=274 value=unsupported payload type flags=has-payload
 hevc_decode_mode 0x00a40a95 (menu) : min=0 max=0 default=0 value=0 (Slice-Based)
 0: Slice-Based
 hevc_start_code 0x00a40a96 (menu) : min=0 max=1 default=0 value=0 (No Start Code)
 0: No Start Code
 1: Annex B Start Code