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-rw-r--r--src/libcamera/v4l2_subdevice.cpp198
1 files changed, 161 insertions, 37 deletions
diff --git a/src/libcamera/v4l2_subdevice.cpp b/src/libcamera/v4l2_subdevice.cpp
index 66da1edb..cc079425 100644
--- a/src/libcamera/v4l2_subdevice.cpp
+++ b/src/libcamera/v4l2_subdevice.cpp
@@ -843,6 +843,62 @@ std::ostream &operator<<(std::ostream &out, const V4L2SubdeviceFormat &f)
*/
/**
+ * \class V4L2Subdevice::Stream
+ * \brief V4L2 subdevice stream
+ *
+ * This class identifies a subdev stream, by bundling the pad number with the
+ * stream number. It is used in all stream-aware functions of the V4L2Subdevice
+ * class to identify the stream the functions operate on.
+ *
+ * \var V4L2Subdevice::Stream::pad
+ * \brief The 0-indexed pad number
+ *
+ * \var V4L2Subdevice::Stream::stream
+ * \brief The stream number
+ */
+
+/**
+ * \fn V4L2Subdevice::Stream::Stream()
+ * \brief Construct a Stream with pad and stream set to 0
+ */
+
+/**
+ * \fn V4L2Subdevice::Stream::Stream(unsigned int pad, unsigned int stream)
+ * \brief Construct a Stream with a given \a pad and \a stream number
+ * \param[in] pad The indexed pad number
+ * \param[in] stream The stream number
+ */
+
+/**
+ * \brief Compare streams for equality
+ * \return True if the two streams are equal, false otherwise
+ */
+bool operator==(const V4L2Subdevice::Stream &lhs, const V4L2Subdevice::Stream &rhs)
+{
+ return lhs.pad == rhs.pad && lhs.stream == rhs.stream;
+}
+
+/**
+ * \fn bool operator!=(const V4L2Subdevice::Stream &lhs, const V4L2Subdevice::Stream &rhs)
+ * \brief Compare streams for inequality
+ * \return True if the two streams are not equal, false otherwise
+ */
+
+/**
+ * \brief Insert a text representation of a V4L2Subdevice::Stream into an
+ * output stream
+ * \param[in] out The output stream
+ * \param[in] stream The V4L2Subdevice::Stream
+ * \return The output stream \a out
+ */
+std::ostream &operator<<(std::ostream &out, const V4L2Subdevice::Stream &stream)
+{
+ out << stream.pad << "/" << stream.stream;
+
+ return out;
+}
+
+/**
* \class V4L2Subdevice::Routing
* \brief V4L2 subdevice routing table
*
@@ -933,7 +989,7 @@ int V4L2Subdevice::open()
/**
* \brief Get selection rectangle \a rect for \a target
- * \param[in] pad The 0-indexed pad number the rectangle is retrieved from
+ * \param[in] stream The stream the rectangle is retrieved from
* \param[in] target The selection target defined by the V4L2_SEL_TGT_* flags
* \param[out] rect The retrieved selection rectangle
*
@@ -941,13 +997,14 @@ int V4L2Subdevice::open()
*
* \return 0 on success or a negative error code otherwise
*/
-int V4L2Subdevice::getSelection(unsigned int pad, unsigned int target,
+int V4L2Subdevice::getSelection(const Stream &stream, unsigned int target,
Rectangle *rect)
{
struct v4l2_subdev_selection sel = {};
sel.which = V4L2_SUBDEV_FORMAT_ACTIVE;
- sel.pad = pad;
+ sel.pad = stream.pad;
+ sel.stream = stream.stream;
sel.target = target;
sel.flags = 0;
@@ -955,7 +1012,7 @@ int V4L2Subdevice::getSelection(unsigned int pad, unsigned int target,
if (ret < 0) {
LOG(V4L2, Error)
<< "Unable to get rectangle " << target << " on pad "
- << pad << ": " << strerror(-ret);
+ << stream << ": " << strerror(-ret);
return ret;
}
@@ -968,8 +1025,19 @@ int V4L2Subdevice::getSelection(unsigned int pad, unsigned int target,
}
/**
+ * \fn V4L2Subdevice::getSelection(unsigned int pad, unsigned int target,
+ * Rectangle *rect)
+ * \brief Get selection rectangle \a rect for \a target
+ * \param[in] pad The 0-indexed pad number the rectangle is retrieved from
+ * \param[in] target The selection target defined by the V4L2_SEL_TGT_* flags
+ * \param[out] rect The retrieved selection rectangle
+ *
+ * \return 0 on success or a negative error code otherwise
+ */
+
+/**
* \brief Set selection rectangle \a rect for \a target
- * \param[in] pad The 0-indexed pad number the rectangle is to be applied to
+ * \param[in] stream The stream the rectangle is to be applied to
* \param[in] target The selection target defined by the V4L2_SEL_TGT_* flags
* \param[inout] rect The selection rectangle to be applied
*
@@ -977,13 +1045,14 @@ int V4L2Subdevice::getSelection(unsigned int pad, unsigned int target,
*
* \return 0 on success or a negative error code otherwise
*/
-int V4L2Subdevice::setSelection(unsigned int pad, unsigned int target,
+int V4L2Subdevice::setSelection(const Stream &stream, unsigned int target,
Rectangle *rect)
{
struct v4l2_subdev_selection sel = {};
sel.which = V4L2_SUBDEV_FORMAT_ACTIVE;
- sel.pad = pad;
+ sel.pad = stream.pad;
+ sel.stream = stream.stream;
sel.target = target;
sel.flags = 0;
@@ -996,7 +1065,7 @@ int V4L2Subdevice::setSelection(unsigned int pad, unsigned int target,
if (ret < 0) {
LOG(V4L2, Error)
<< "Unable to set rectangle " << target << " on pad "
- << pad << ": " << strerror(-ret);
+ << stream << ": " << strerror(-ret);
return ret;
}
@@ -1007,26 +1076,40 @@ int V4L2Subdevice::setSelection(unsigned int pad, unsigned int target,
return 0;
}
+
/**
- * \brief Enumerate all media bus codes and frame sizes on a \a pad
- * \param[in] pad The 0-indexed pad number to enumerate formats on
+ * \fn V4L2Subdevice::setSelection(unsigned int pad, unsigned int target,
+ * Rectangle *rect)
+ * \brief Set selection rectangle \a rect for \a target
+ * \param[in] pad The 0-indexed pad number the rectangle is to be applied to
+ * \param[in] target The selection target defined by the V4L2_SEL_TGT_* flags
+ * \param[inout] rect The selection rectangle to be applied
+ *
+ * \todo Define a V4L2SelectionTarget enum for the selection target
+ *
+ * \return 0 on success or a negative error code otherwise
+ */
+
+/**
+ * \brief Enumerate all media bus codes and frame sizes on a \a stream
+ * \param[in] stream The stream to enumerate formats for
*
* Enumerate all media bus codes and frame sizes supported by the subdevice on
- * a \a pad.
+ * a \a stream.
*
* \return A list of the supported device formats
*/
-V4L2Subdevice::Formats V4L2Subdevice::formats(unsigned int pad)
+V4L2Subdevice::Formats V4L2Subdevice::formats(const Stream &stream)
{
Formats formats;
- if (pad >= entity_->pads().size()) {
- LOG(V4L2, Error) << "Invalid pad: " << pad;
+ if (stream.pad >= entity_->pads().size()) {
+ LOG(V4L2, Error) << "Invalid pad: " << stream.pad;
return {};
}
- for (unsigned int code : enumPadCodes(pad)) {
- std::vector<SizeRange> sizes = enumPadSizes(pad, code);
+ for (unsigned int code : enumPadCodes(stream)) {
+ std::vector<SizeRange> sizes = enumPadSizes(stream, code);
if (sizes.empty())
return {};
@@ -1034,7 +1117,7 @@ V4L2Subdevice::Formats V4L2Subdevice::formats(unsigned int pad)
if (!inserted.second) {
LOG(V4L2, Error)
<< "Could not add sizes for media bus code "
- << code << " on pad " << pad;
+ << code << " on pad " << stream.pad;
return {};
}
}
@@ -1042,6 +1125,17 @@ V4L2Subdevice::Formats V4L2Subdevice::formats(unsigned int pad)
return formats;
}
+/**
+ * \fn V4L2Subdevice::formats(unsigned int pad)
+ * \brief Enumerate all media bus codes and frame sizes on a \a pad
+ * \param[in] pad The 0-indexed pad number to enumerate formats on
+ *
+ * Enumerate all media bus codes and frame sizes supported by the subdevice on
+ * a \a pad
+ *
+ * \return A list of the supported device formats
+ */
+
std::optional<ColorSpace> V4L2Subdevice::toColorSpace(const v4l2_mbus_framefmt &format) const
{
/*
@@ -1073,25 +1167,26 @@ std::optional<ColorSpace> V4L2Subdevice::toColorSpace(const v4l2_mbus_framefmt &
}
/**
- * \brief Retrieve the image format set on one of the V4L2 subdevice pads
- * \param[in] pad The 0-indexed pad number the format is to be retrieved from
+ * \brief Retrieve the image format set on one of the V4L2 subdevice streams
+ * \param[in] stream The stream the format is to be retrieved from
* \param[out] format The image bus format
* \param[in] whence The format to get, \ref V4L2Subdevice::ActiveFormat
* "ActiveFormat" or \ref V4L2Subdevice::TryFormat "TryFormat"
* \return 0 on success or a negative error code otherwise
*/
-int V4L2Subdevice::getFormat(unsigned int pad, V4L2SubdeviceFormat *format,
+int V4L2Subdevice::getFormat(const Stream &stream, V4L2SubdeviceFormat *format,
Whence whence)
{
struct v4l2_subdev_format subdevFmt = {};
subdevFmt.which = whence;
- subdevFmt.pad = pad;
+ subdevFmt.pad = stream.pad;
+ subdevFmt.stream = stream.stream;
int ret = ioctl(VIDIOC_SUBDEV_G_FMT, &subdevFmt);
if (ret) {
LOG(V4L2, Error)
- << "Unable to get format on pad " << pad
- << ": " << strerror(-ret);
+ << "Unable to get format on pad " << stream << ": "
+ << strerror(-ret);
return ret;
}
@@ -1104,23 +1199,35 @@ int V4L2Subdevice::getFormat(unsigned int pad, V4L2SubdeviceFormat *format,
}
/**
+ * \fn V4L2Subdevice::getFormat(unsigned int pad, V4L2SubdeviceFormat *format,
+ * Whence whence)
+ * \brief Retrieve the image format set on one of the V4L2 subdevice pads
+ * \param[in] pad The 0-indexed pad number the format is to be retrieved from
+ * \param[out] format The image bus format
+ * \param[in] whence The format to get, \ref V4L2Subdevice::ActiveFormat
+ * "ActiveFormat" or \ref V4L2Subdevice::TryFormat "TryFormat"
+ * \return 0 on success or a negative error code otherwise
+ */
+
+/**
* \brief Set an image format on one of the V4L2 subdevice pads
- * \param[in] pad The 0-indexed pad number the format is to be applied to
- * \param[inout] format The image bus format to apply to the subdevice's pad
+ * \param[in] stream The stream the format is to be applied to
+ * \param[inout] format The image bus format to apply to the stream
* \param[in] whence The format to set, \ref V4L2Subdevice::ActiveFormat
* "ActiveFormat" or \ref V4L2Subdevice::TryFormat "TryFormat"
*
- * Apply the requested image format to the desired media pad and return the
+ * Apply the requested image format to the desired stream and return the
* actually applied format parameters, as getFormat() would do.
*
* \return 0 on success or a negative error code otherwise
*/
-int V4L2Subdevice::setFormat(unsigned int pad, V4L2SubdeviceFormat *format,
+int V4L2Subdevice::setFormat(const Stream &stream, V4L2SubdeviceFormat *format,
Whence whence)
{
struct v4l2_subdev_format subdevFmt = {};
subdevFmt.which = whence;
- subdevFmt.pad = pad;
+ subdevFmt.pad = stream.pad;
+ subdevFmt.stream = stream.stream;
subdevFmt.format.width = format->size.width;
subdevFmt.format.height = format->size.height;
subdevFmt.format.code = format->code;
@@ -1129,15 +1236,15 @@ int V4L2Subdevice::setFormat(unsigned int pad, V4L2SubdeviceFormat *format,
fromColorSpace(format->colorSpace, subdevFmt.format);
/* The CSC flag is only applicable to source pads. */
- if (entity_->pads()[pad]->flags() & MEDIA_PAD_FL_SOURCE)
+ if (entity_->pads()[stream.pad]->flags() & MEDIA_PAD_FL_SOURCE)
subdevFmt.format.flags |= V4L2_MBUS_FRAMEFMT_SET_CSC;
}
int ret = ioctl(VIDIOC_SUBDEV_S_FMT, &subdevFmt);
if (ret) {
LOG(V4L2, Error)
- << "Unable to set format on pad " << pad
- << ": " << strerror(-ret);
+ << "Unable to set format on pad " << stream << ": "
+ << strerror(-ret);
return ret;
}
@@ -1150,6 +1257,21 @@ int V4L2Subdevice::setFormat(unsigned int pad, V4L2SubdeviceFormat *format,
}
/**
+ * \fn V4L2Subdevice::setFormat(unsigned int pad, V4L2SubdeviceFormat *format,
+ * Whence whence)
+ * \brief Set an image format on one of the V4L2 subdevice pads
+ * \param[in] pad The 0-indexed pad number the format is to be applied to
+ * \param[inout] format The image bus format to apply to the subdevice's pad
+ * \param[in] whence The format to set, \ref V4L2Subdevice::ActiveFormat
+ * "ActiveFormat" or \ref V4L2Subdevice::TryFormat "TryFormat"
+ *
+ * Apply the requested image format to the desired media pad and return the
+ * actually applied format parameters, as getFormat() would do.
+ *
+ * \return 0 on success or a negative error code otherwise
+ */
+
+/**
* \brief Retrieve the subdevice's internal routing table
* \param[out] routing The routing table
* \param[in] whence The routing table to get, \ref V4L2Subdevice::ActiveFormat
@@ -1310,14 +1432,15 @@ std::string V4L2Subdevice::logPrefix() const
return "'" + entity_->name() + "'";
}
-std::vector<unsigned int> V4L2Subdevice::enumPadCodes(unsigned int pad)
+std::vector<unsigned int> V4L2Subdevice::enumPadCodes(const Stream &stream)
{
std::vector<unsigned int> codes;
int ret;
for (unsigned int index = 0; ; index++) {
struct v4l2_subdev_mbus_code_enum mbusEnum = {};
- mbusEnum.pad = pad;
+ mbusEnum.pad = stream.pad;
+ mbusEnum.stream = stream.stream;
mbusEnum.index = index;
mbusEnum.which = V4L2_SUBDEV_FORMAT_ACTIVE;
@@ -1330,7 +1453,7 @@ std::vector<unsigned int> V4L2Subdevice::enumPadCodes(unsigned int pad)
if (ret < 0 && ret != -EINVAL) {
LOG(V4L2, Error)
- << "Unable to enumerate formats on pad " << pad
+ << "Unable to enumerate formats on pad " << stream
<< ": " << strerror(-ret);
return {};
}
@@ -1338,7 +1461,7 @@ std::vector<unsigned int> V4L2Subdevice::enumPadCodes(unsigned int pad)
return codes;
}
-std::vector<SizeRange> V4L2Subdevice::enumPadSizes(unsigned int pad,
+std::vector<SizeRange> V4L2Subdevice::enumPadSizes(const Stream &stream,
unsigned int code)
{
std::vector<SizeRange> sizes;
@@ -1347,7 +1470,8 @@ std::vector<SizeRange> V4L2Subdevice::enumPadSizes(unsigned int pad,
for (unsigned int index = 0;; index++) {
struct v4l2_subdev_frame_size_enum sizeEnum = {};
sizeEnum.index = index;
- sizeEnum.pad = pad;
+ sizeEnum.pad = stream.pad;
+ sizeEnum.stream = stream.stream;
sizeEnum.code = code;
sizeEnum.which = V4L2_SUBDEV_FORMAT_ACTIVE;
@@ -1361,7 +1485,7 @@ std::vector<SizeRange> V4L2Subdevice::enumPadSizes(unsigned int pad,
if (ret < 0 && ret != -EINVAL && ret != -ENOTTY) {
LOG(V4L2, Error)
- << "Unable to enumerate sizes on pad " << pad
+ << "Unable to enumerate sizes on pad " << stream
<< ": " << strerror(-ret);
return {};
}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-21 09:32:54 +0000