admin/webrtc_m130
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Improve ergonomics of dealing with pixel formats in v4l2 camera backend

Browse Source 
Bug: webrtc:14830
Change-Id: Ib49bf65895fe008e75223abb03867d412c1b5a60
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/291531
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39976}
This commit is contained in:
Andreas Pehrson 2023-01-27 16:09:27 +01:00 committed by WebRTC LUCI CQ
parent d3eddff30c
commit 32b64e895c
2 changed files with 17 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
modules/video_capture/linux/device_info_v4l2.cc
View File

@ -228,10 +228,10 @@ int32_t DeviceInfoV4l2::FillCapabilities(int fd) {
video_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
video_fmt.fmt.pix.sizeimage = 0;
int totalFmts = 5;
unsigned int videoFormats[] = {V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_YUV420,
V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY,
V4L2_PIX_FMT_NV12};
constexpr int totalFmts = sizeof(videoFormats) / sizeof(unsigned int);
int sizes = 13;
unsigned int size[][2] = {{128, 96}, {160, 120}, {176, 144}, {320, 240},
@ -261,6 +261,8 @@ int32_t DeviceInfoV4l2::FillCapabilities(int fd) {
cap.videoType = VideoType::kUYVY;
} else if (videoFormats[fmts] == V4L2_PIX_FMT_NV12) {
cap.videoType = VideoType::kNV12;
} else {
RTC_DCHECK_NOTREACHED();
}
// get fps of current camera mode

31
modules/video_capture/linux/video_capture_v4l2.cc
View File

@ -115,23 +115,18 @@ int32_t VideoCaptureModuleV4L2::StartCapture(
// Supported video formats in preferred order.
// If the requested resolution is larger than VGA, we prefer MJPEG. Go for
// I420 otherwise.
const int nFormats = 6;
unsigned int fmts[nFormats];
if (capability.width > 640 || capability.height > 480) {
fmts[0] = V4L2_PIX_FMT_MJPEG;
fmts[1] = V4L2_PIX_FMT_YUV420;
fmts[2] = V4L2_PIX_FMT_YUYV;
fmts[3] = V4L2_PIX_FMT_UYVY;
fmts[4] = V4L2_PIX_FMT_NV12;
fmts[5] = V4L2_PIX_FMT_JPEG;
} else {
fmts[0] = V4L2_PIX_FMT_YUV420;
fmts[1] = V4L2_PIX_FMT_YUYV;
fmts[2] = V4L2_PIX_FMT_UYVY;
fmts[3] = V4L2_PIX_FMT_NV12;
fmts[4] = V4L2_PIX_FMT_MJPEG;
fmts[5] = V4L2_PIX_FMT_JPEG;
}
unsigned int hdFmts[] = {
V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YUYV,
V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_NV12, V4L2_PIX_FMT_JPEG,
};
unsigned int sdFmts[] = {
V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY,
V4L2_PIX_FMT_NV12, V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_JPEG,
};
const bool isHd = capability.width > 640 || capability.height > 480;
unsigned int* fmts = isHd ? hdFmts : sdFmts;
static_assert(sizeof(hdFmts) == sizeof(sdFmts));
constexpr int nFormats = sizeof(hdFmts) / sizeof(unsigned int);
// Enumerate image formats.
struct v4l2_fmtdesc fmt;
@ -180,6 +175,8 @@ int32_t VideoCaptureModuleV4L2::StartCapture(
else if (video_fmt.fmt.pix.pixelformat == V4L2_PIX_FMT_MJPEG ||
video_fmt.fmt.pix.pixelformat == V4L2_PIX_FMT_JPEG)
_captureVideoType = VideoType::kMJPEG;
else
RTC_DCHECK_NOTREACHED();
// set format and frame size now
if (ioctl(_deviceFd, VIDIOC_S_FMT, &video_fmt) < 0) {