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videoio: added YUV420 format (UV order) support to v4l capture

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This commit is contained in:
Maksim Shabunin 2018-08-02 18:34:11 +03:00
parent 2dbb5871e0
commit a2daf0c83c
1 changed files with 8 additions and 3 deletions
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11
modules/videoio/src/cap_v4l.cpp
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@ -431,6 +431,7 @@ static int autosetup_capture_mode_v4l2(CvCaptureCAM_V4L* capture) {
V4L2_PIX_FMT_BGR24,
V4L2_PIX_FMT_RGB24,
V4L2_PIX_FMT_YVU420,
V4L2_PIX_FMT_YUV420,
V4L2_PIX_FMT_YUV411P,
V4L2_PIX_FMT_YUYV,
V4L2_PIX_FMT_UYVY,
@ -531,6 +532,7 @@ static int v4l2_set_fps(CvCaptureCAM_V4L* capture) {
static int v4l2_num_channels(__u32 palette) {
switch(palette) {
case V4L2_PIX_FMT_YVU420:
case V4L2_PIX_FMT_YUV420:
case V4L2_PIX_FMT_MJPEG:
case V4L2_PIX_FMT_JPEG:
case V4L2_PIX_FMT_Y16:
@ -560,6 +562,7 @@ static void v4l2_create_frame(CvCaptureCAM_V4L *capture) {
size = CvSize(capture->buffers[capture->bufferIndex].length, 1);
break;
case V4L2_PIX_FMT_YVU420:
case V4L2_PIX_FMT_YUV420:
size.height = size.height * 3 / 2; // "1.5" channels
break;
case V4L2_PIX_FMT_Y16:
@ -1019,10 +1022,10 @@ move_411_block(int yTL, int yTR, int yBL, int yBR, int u, int v,
/* Converts from planar YUV420P to RGB24. */
static inline void
yuv420p_to_rgb24(int width, int height, uchar* src, uchar* dst)
yuv420p_to_rgb24(int width, int height, uchar* src, uchar* dst, bool isYUV)
{
cvtColor(Mat(height * 3 / 2, width, CV_8U, src), Mat(height, width, CV_8UC3, dst),
COLOR_YUV2BGR_YV12);
isYUV ? COLOR_YUV2BGR_IYUV : COLOR_YUV2BGR_YV12);
}
// Consider a YUV411P image of 8x2 pixels.
@ -1481,10 +1484,12 @@ static IplImage* icvRetrieveFrameCAM_V4L( CvCaptureCAM_V4L* capture, int) {
break;
case V4L2_PIX_FMT_YVU420:
case V4L2_PIX_FMT_YUV420:
yuv420p_to_rgb24(capture->form.fmt.pix.width,
capture->form.fmt.pix.height,
(unsigned char*)(capture->buffers[capture->bufferIndex].start),
(unsigned char*)capture->frame.imageData);
(unsigned char*)capture->frame.imageData,
capture->palette == V4L2_PIX_FMT_YUV420);
break;
case V4L2_PIX_FMT_YUV411P: