diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2020-03-13 03:38:00 +0200 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2020-05-10 23:58:34 +0300 |
| commit | cd6addc31b72059dbbb1319afeebbc4d0908c064 (patch) | |
| tree | cc7340ed0aaed14440b09d0b8246be8256873685 /src/libcamera/v4l2_videodevice.cpp | |
| parent | 972bb30c4b2fdd50f8fc02683130fd45b0d793f6 (diff) | |
libcamera: v4l2_videodevice: Support filtering formats by media bus code
Add support for the recent V4L2 extension to VIDIOC_ENUM_FMT that allows
filtering pixel formats by media bus codes.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Diffstat (limited to 'src/libcamera/v4l2_videodevice.cpp')
| -rw-r--r-- | src/libcamera/v4l2_videodevice.cpp | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/libcamera/v4l2_videodevice.cpp b/src/libcamera/v4l2_videodevice.cpp index e95b0c01..4b9f8b5c 100644 --- a/src/libcamera/v4l2_videodevice.cpp +++ b/src/libcamera/v4l2_videodevice.cpp @@ -917,16 +917,19 @@ int V4L2VideoDevice::setFormatSingleplane(V4L2DeviceFormat *format) /** * \brief Enumerate all pixel formats and frame sizes + * \param[in] code Restrict formats to this media bus code. * * Enumerate all pixel formats and frame sizes supported by the video device. + * If the \a code argument is not zero, only formats compatible with that media + * bus code will be enumerated. * * \return A list of the supported video device formats */ -std::map<V4L2PixelFormat, std::vector<SizeRange>> V4L2VideoDevice::formats() +std::map<V4L2PixelFormat, std::vector<SizeRange>> V4L2VideoDevice::formats(uint32_t code) { std::map<V4L2PixelFormat, std::vector<SizeRange>> formats; - for (V4L2PixelFormat pixelFormat : enumPixelformats()) { + for (V4L2PixelFormat pixelFormat : enumPixelformats(code)) { std::vector<SizeRange> sizes = enumSizes(pixelFormat); if (sizes.empty()) return {}; @@ -944,15 +947,22 @@ std::map<V4L2PixelFormat, std::vector<SizeRange>> V4L2VideoDevice::formats() return formats; } -std::vector<V4L2PixelFormat> V4L2VideoDevice::enumPixelformats() +std::vector<V4L2PixelFormat> V4L2VideoDevice::enumPixelformats(uint32_t code) { std::vector<V4L2PixelFormat> formats; int ret; + if (code && !(caps_.device_caps() & V4L2_CAP_IO_MC)) { + LOG(V4L2, Error) + << "Media bus code filtering not supported by the device"; + return {}; + } + for (unsigned int index = 0; ; index++) { struct v4l2_fmtdesc pixelformatEnum = {}; pixelformatEnum.index = index; pixelformatEnum.type = bufferType_; + pixelformatEnum.mbus_code = code; ret = ioctl(VIDIOC_ENUM_FMT, &pixelformatEnum); if (ret) |