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apps: cam: sdl_texture: Support NV21

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SDL also supports NV21 with the same `SDL_UpdateNVTexture()`,
so add support for it.

Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
This commit is contained in:
Barnabás Pőcze
2025-07-27 21:03:34 +02:00
parent 731a340c80
commit d971584579
3 changed files with 15 additions and 6 deletions
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4
src/apps/cam/sdl_sink.cpp
View File

@@ -112,7 +112,9 @@ int SDLSink::configure(const libcamera::CameraConfiguration &config)
#endif
#if SDL_VERSION_ATLEAST(2, 0, 16)
else if (cfg.pixelFormat == libcamera::formats::NV12)
texture_ = std::make_unique<SDLTextureNV12>(rect_, cfg.stride);
texture_ = std::make_unique<SDLTextureNV>(rect_, SDL_PIXELFORMAT_NV12, cfg.stride);
else if (cfg.pixelFormat == libcamera::formats::NV21)
texture_ = std::make_unique<SDLTextureNV>(rect_, SDL_PIXELFORMAT_NV21, cfg.stride);
#endif
else {
std::cerr << "Unsupported pixel format " << cfg.pixelFormat << std::endl;

13
src/apps/cam/sdl_texture_yuv.cpp
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@@ -7,16 +7,23 @@
#include "sdl_texture_yuv.h"
#include <assert.h>
using namespace libcamera;
#if SDL_VERSION_ATLEAST(2, 0, 16)
SDLTextureNV12::SDLTextureNV12(const SDL_Rect &rect, unsigned int stride)
: SDLTexture(rect, SDL_PIXELFORMAT_NV12, stride)
SDLTextureNV::SDLTextureNV(const SDL_Rect &rect, uint32_t pixelFormat, unsigned int stride)
: SDLTexture(rect, pixelFormat, stride)
{
assert(pixelFormat == SDL_PIXELFORMAT_NV12 || pixelFormat == SDL_PIXELFORMAT_NV21);
}
void SDLTextureNV12::update(libcamera::Span<const libcamera::Span<const uint8_t>> data)
void SDLTextureNV::update(libcamera::Span<const libcamera::Span<const uint8_t>> data)
{
assert(data.size() == 2);
assert(data[0].size_bytes() == std::size_t(rect_.h) * std::size_t(stride_));
assert(data[1].size_bytes() == std::size_t(rect_.h) * std::size_t(stride_) / 2);
SDL_UpdateNVTexture(ptr_, nullptr, data[0].data(), stride_,
data[1].data(), stride_);
}

4
src/apps/cam/sdl_texture_yuv.h
View File

@@ -10,10 +10,10 @@
#include "sdl_texture.h"
#if SDL_VERSION_ATLEAST(2, 0, 16)
class SDLTextureNV12 : public SDLTexture
class SDLTextureNV : public SDLTexture
{
public:
SDLTextureNV12(const SDL_Rect &rect, unsigned int stride);
SDLTextureNV(const SDL_Rect &rect, uint32_t pixelFormat, unsigned int stride);
void update(libcamera::Span<const libcamera::Span<const uint8_t>> data) override;
};
#endif