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spa: libcamera: source: simplify color space conversion

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Instead of using an out parameter, just return the `spa_video_colorimetry`
object; and do the libcamera -> spa conversion in a single place, where
the data is actually added to the pod.
This commit is contained in:
Barnabás Pőcze 2025-07-24 10:51:14 +02:00 • committed by Wim Taymans
parent a858290e4b
commit 938195b19f
1 changed files with 22 additions and 20 deletions
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42
spa/plugins/libcamera/libcamera-source.cpp
View file

@ -444,60 +444,64 @@ int score_size(const Size &a, const Size &b)
return x * x + y * y;
}
void
parse_colorimetry(const ColorSpace& colorspace,
struct spa_video_colorimetry *colorimetry)
[[nodiscard]]
spa_video_colorimetry
color_space_to_colorimetry(const libcamera::ColorSpace& colorspace)
{
spa_video_colorimetry res = {};
switch (colorspace.range) {
case ColorSpace::Range::Full:
colorimetry->range = SPA_VIDEO_COLOR_RANGE_0_255;
res.range = SPA_VIDEO_COLOR_RANGE_0_255;
break;
case ColorSpace::Range::Limited:
colorimetry->range = SPA_VIDEO_COLOR_RANGE_16_235;
res.range = SPA_VIDEO_COLOR_RANGE_16_235;
break;
}
switch (colorspace.ycbcrEncoding) {
case ColorSpace::YcbcrEncoding::None:
colorimetry->matrix = SPA_VIDEO_COLOR_MATRIX_RGB;
res.matrix = SPA_VIDEO_COLOR_MATRIX_RGB;
break;
case ColorSpace::YcbcrEncoding::Rec601:
colorimetry->matrix = SPA_VIDEO_COLOR_MATRIX_BT601;
res.matrix = SPA_VIDEO_COLOR_MATRIX_BT601;
break;
case ColorSpace::YcbcrEncoding::Rec709:
colorimetry->matrix = SPA_VIDEO_COLOR_MATRIX_BT709;
res.matrix = SPA_VIDEO_COLOR_MATRIX_BT709;
break;
case ColorSpace::YcbcrEncoding::Rec2020:
colorimetry->matrix = SPA_VIDEO_COLOR_MATRIX_BT2020;
res.matrix = SPA_VIDEO_COLOR_MATRIX_BT2020;
break;
}
switch (colorspace.transferFunction) {
case ColorSpace::TransferFunction::Linear:
colorimetry->transfer = SPA_VIDEO_TRANSFER_UNKNOWN;
res.transfer = SPA_VIDEO_TRANSFER_UNKNOWN;
break;
case ColorSpace::TransferFunction::Srgb:
colorimetry->transfer = SPA_VIDEO_TRANSFER_SRGB;
res.transfer = SPA_VIDEO_TRANSFER_SRGB;
break;
case ColorSpace::TransferFunction::Rec709:
colorimetry->transfer = SPA_VIDEO_TRANSFER_BT709;
res.transfer = SPA_VIDEO_TRANSFER_BT709;
break;
}
switch (colorspace.primaries) {
case ColorSpace::Primaries::Raw:
colorimetry->primaries = SPA_VIDEO_COLOR_PRIMARIES_UNKNOWN;
res.primaries = SPA_VIDEO_COLOR_PRIMARIES_UNKNOWN;
break;
case ColorSpace::Primaries::Smpte170m:
colorimetry->primaries = SPA_VIDEO_COLOR_PRIMARIES_SMPTE170M;
res.primaries = SPA_VIDEO_COLOR_PRIMARIES_SMPTE170M;
break;
case ColorSpace::Primaries::Rec709:
colorimetry->primaries = SPA_VIDEO_COLOR_PRIMARIES_BT709;
res.primaries = SPA_VIDEO_COLOR_PRIMARIES_BT709;
break;
case ColorSpace::Primaries::Rec2020:
colorimetry->primaries = SPA_VIDEO_COLOR_PRIMARIES_BT2020;
res.primaries = SPA_VIDEO_COLOR_PRIMARIES_BT2020;
break;
}
return res;
}
int
@ -508,7 +512,6 @@ spa_libcamera_enum_format(struct impl *impl, struct port *port, int seq,
struct spa_pod_builder b = { 0 };
struct spa_pod_frame f[2];
struct spa_result_node_params result;
struct spa_video_colorimetry colorimetry = {};
uint32_t count = 0;
spa_libcamera_get_config(impl);
@ -517,9 +520,6 @@ spa_libcamera_enum_format(struct impl *impl, struct port *port, int seq,
const StreamFormats &formats = streamConfig.formats();
const auto &pixel_formats = formats.pixelformats();
if (streamConfig.colorSpace)
parse_colorimetry(*streamConfig.colorSpace, &colorimetry);
result.id = SPA_PARAM_EnumFormat;
result.next = start;
@ -617,6 +617,8 @@ next_fmt:
}
if (streamConfig.colorSpace) {
auto colorimetry = color_space_to_colorimetry(*streamConfig.colorSpace);
spa_pod_builder_add(&b,
SPA_FORMAT_VIDEO_colorRange,
SPA_POD_Id(colorimetry.range),