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-rw-r--r--src/v4l2/v4l2_camera.cpp20
-rw-r--r--src/v4l2/v4l2_camera.h3
-rw-r--r--src/v4l2/v4l2_camera_proxy.cpp41
-rw-r--r--src/v4l2/v4l2_camera_proxy.h2
4 files changed, 48 insertions, 18 deletions
diff --git a/src/v4l2/v4l2_camera.cpp b/src/v4l2/v4l2_camera.cpp
index a923256a..61bca073 100644
--- a/src/v4l2/v4l2_camera.cpp
+++ b/src/v4l2/v4l2_camera.cpp
@@ -138,6 +138,26 @@ int V4L2Camera::configure(StreamConfiguration *streamConfigOut,
return 0;
}
+int V4L2Camera::validateConfiguration(const PixelFormat &pixelFormat,
+ const Size &size,
+ StreamConfiguration *streamConfigOut)
+{
+ std::unique_ptr<CameraConfiguration> config =
+ camera_->generateConfiguration({ StreamRole::Viewfinder });
+ StreamConfiguration &cfg = config->at(0);
+ cfg.size = size;
+ cfg.pixelFormat = pixelFormat;
+ cfg.bufferCount = 1;
+
+ CameraConfiguration::Status validation = config->validate();
+ if (validation == CameraConfiguration::Invalid)
+ return -EINVAL;
+
+ *streamConfigOut = cfg;
+
+ return 0;
+}
+
int V4L2Camera::allocBuffers(unsigned int count)
{
Stream *stream = config_->at(0).stream();
diff --git a/src/v4l2/v4l2_camera.h b/src/v4l2/v4l2_camera.h
index 515e9060..be6c4e18 100644
--- a/src/v4l2/v4l2_camera.h
+++ b/src/v4l2/v4l2_camera.h
@@ -47,6 +47,9 @@ public:
int configure(StreamConfiguration *streamConfigOut,
const Size &size, const PixelFormat &pixelformat,
unsigned int bufferCount);
+ int validateConfiguration(const PixelFormat &pixelformat,
+ const Size &size,
+ StreamConfiguration *streamConfigOut);
int allocBuffers(unsigned int count);
void freeBuffers();
diff --git a/src/v4l2/v4l2_camera_proxy.cpp b/src/v4l2/v4l2_camera_proxy.cpp
index 8c55a060..50ab7e66 100644
--- a/src/v4l2/v4l2_camera_proxy.cpp
+++ b/src/v4l2/v4l2_camera_proxy.cpp
@@ -296,33 +296,36 @@ int V4L2CameraProxy::vidioc_g_fmt(V4L2CameraFile *file, struct v4l2_format *arg)
return 0;
}
-void V4L2CameraProxy::tryFormat(struct v4l2_format *arg)
+int V4L2CameraProxy::tryFormat(struct v4l2_format *arg)
{
V4L2PixelFormat v4l2Format = V4L2PixelFormat(arg->fmt.pix.pixelformat);
PixelFormat format = PixelFormatInfo::info(v4l2Format).format;
- const std::vector<PixelFormat> &formats =
- streamConfig_.formats().pixelformats();
- if (std::find(formats.begin(), formats.end(), format) == formats.end())
- format = streamConfig_.formats().pixelformats()[0];
-
Size size(arg->fmt.pix.width, arg->fmt.pix.height);
- const std::vector<Size> &sizes = streamConfig_.formats().sizes(format);
- if (std::find(sizes.begin(), sizes.end(), size) == sizes.end())
- size = streamConfig_.formats().sizes(format)[0];
- const PixelFormatInfo &formatInfo = PixelFormatInfo::info(format);
+ StreamConfiguration config;
+ int ret = vcam_->validateConfiguration(format, size, &config);
+ if (ret < 0) {
+ LOG(V4L2Compat, Error)
+ << "Failed to negotiate a valid format: "
+ << format.toString();
+ return -EINVAL;
+ }
+
+ const PixelFormatInfo &info = PixelFormatInfo::info(config.pixelFormat);
- arg->fmt.pix.width = size.width;
- arg->fmt.pix.height = size.height;
- arg->fmt.pix.pixelformat = formatInfo.v4l2Format;
+ arg->fmt.pix.width = config.size.width;
+ arg->fmt.pix.height = config.size.height;
+ arg->fmt.pix.pixelformat = info.v4l2Format;
arg->fmt.pix.field = V4L2_FIELD_NONE;
- arg->fmt.pix.bytesperline = formatInfo.stride(size.width, 0);
- arg->fmt.pix.sizeimage = formatInfo.frameSize(size);
+ arg->fmt.pix.bytesperline = config.stride;
+ arg->fmt.pix.sizeimage = config.frameSize;
arg->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
arg->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
arg->fmt.pix.ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
arg->fmt.pix.quantization = V4L2_QUANTIZATION_DEFAULT;
arg->fmt.pix.xfer_func = V4L2_XFER_FUNC_DEFAULT;
+
+ return 0;
}
int V4L2CameraProxy::vidioc_s_fmt(V4L2CameraFile *file, struct v4l2_format *arg)
@@ -339,7 +342,9 @@ int V4L2CameraProxy::vidioc_s_fmt(V4L2CameraFile *file, struct v4l2_format *arg)
if (ret < 0)
return ret;
- tryFormat(arg);
+ ret = tryFormat(arg);
+ if (ret < 0)
+ return ret;
Size size(arg->fmt.pix.width, arg->fmt.pix.height);
V4L2PixelFormat v4l2Format = V4L2PixelFormat(arg->fmt.pix.pixelformat);
@@ -361,7 +366,9 @@ int V4L2CameraProxy::vidioc_try_fmt(V4L2CameraFile *file, struct v4l2_format *ar
if (!validateBufferType(arg->type))
return -EINVAL;
- tryFormat(arg);
+ int ret = tryFormat(arg);
+ if (ret < 0)
+ return ret;
return 0;
}
diff --git a/src/v4l2/v4l2_camera_proxy.h b/src/v4l2/v4l2_camera_proxy.h
index e9626942..f06b5b87 100644
--- a/src/v4l2/v4l2_camera_proxy.h
+++ b/src/v4l2/v4l2_camera_proxy.h
@@ -41,7 +41,7 @@ private:
bool validateMemoryType(uint32_t memory);
void setFmtFromConfig(StreamConfiguration &streamConfig);
void querycap(std::shared_ptr<Camera> camera);
- void tryFormat(struct v4l2_format *arg);
+ int tryFormat(struct v4l2_format *arg);
enum v4l2_priority maxPriority();
void updateBuffers();
void freeBuffers();