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[fix] fix color space for thumbnail

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This commit is contained in:
dijunkun
2025-05-29 14:17:33 +08:00
parent 818dab764f
commit b86d3d42ee
2 changed files with 29 additions and 24 deletions
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51
src/single_window/thumbnail.cpp
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@@ -82,35 +82,40 @@ bool LoadTextureFromFile(const char* file_name, SDL_Renderer* renderer,
return ret;
}
void ScaleYUV420pToABGR(char* dst_buffer_, int video_width_, int video_height_,
int scaled_video_width_, int scaled_video_height_,
char* rgba_buffer_) {
int src_y_size = video_width_ * video_height_;
int src_uv_size = (video_width_ + 1) / 2 * (video_height_ + 1) / 2;
int dst_y_size = scaled_video_width_ * scaled_video_height_;
int dst_uv_size =
(scaled_video_width_ + 1) / 2 * (scaled_video_height_ + 1) / 2;
void ScaleNv12ToABGR(char* dst_buffer_, int video_width_, int video_height_,
int scaled_video_width_, int scaled_video_height_,
char* rgba_buffer_) {
uint8_t* src_y = reinterpret_cast<uint8_t*>(dst_buffer_);
uint8_t* src_u = src_y + src_y_size;
uint8_t* src_v = src_u + src_uv_size;
uint8_t* src_uv = src_y + video_width_ * video_height_;
int src_uv_stride = video_width_ / 2;
int src_uv_size = src_uv_stride * (video_height_ / 2);
std::unique_ptr<uint8_t[]> dst_y(new uint8_t[dst_y_size]);
std::unique_ptr<uint8_t[]> tmp_u(new uint8_t[src_uv_size]);
std::unique_ptr<uint8_t[]> tmp_v(new uint8_t[src_uv_size]);
libyuv::NV12ToI420(src_y, video_width_, src_uv, video_width_, src_y,
video_width_, tmp_u.get(), src_uv_stride, tmp_v.get(),
src_uv_stride, video_width_, video_height_);
int dst_y_stride = scaled_video_width_;
int dst_uv_stride = (scaled_video_width_ + 1) / 2;
int dst_uv_size = dst_uv_stride * ((scaled_video_height_ + 1) / 2);
std::unique_ptr<uint8_t[]> dst_y(
new uint8_t[dst_y_stride * scaled_video_height_]);
std::unique_ptr<uint8_t[]> dst_u(new uint8_t[dst_uv_size]);
std::unique_ptr<uint8_t[]> dst_v(new uint8_t[dst_uv_size]);
libyuv::I420Scale(src_y, video_width_, src_u, (video_width_ + 1) / 2, src_v,
(video_width_ + 1) / 2, video_width_, video_height_,
dst_y.get(), scaled_video_width_, dst_u.get(),
(scaled_video_width_ + 1) / 2, dst_v.get(),
(scaled_video_width_ + 1) / 2, scaled_video_width_,
libyuv::I420Scale(src_y, video_width_, tmp_u.get(), src_uv_stride,
tmp_v.get(), src_uv_stride, video_width_, video_height_,
dst_y.get(), dst_y_stride, dst_u.get(), dst_uv_stride,
dst_v.get(), dst_uv_stride, scaled_video_width_,
scaled_video_height_, libyuv::kFilterBilinear);
libyuv::I420ToABGR(
dst_y.get(), scaled_video_width_, dst_u.get(),
(scaled_video_width_ + 1) / 2, dst_v.get(), (scaled_video_width_ + 1) / 2,
reinterpret_cast<uint8_t*>(rgba_buffer_), scaled_video_width_ * 4,
scaled_video_width_, scaled_video_height_);
dst_y.get(), dst_y_stride, dst_u.get(), dst_uv_stride, dst_v.get(),
dst_uv_stride, reinterpret_cast<uint8_t*>(rgba_buffer_),
scaled_video_width_ * 4, scaled_video_width_, scaled_video_height_);
}
Thumbnail::Thumbnail() {
@@ -141,8 +146,8 @@ int Thumbnail::SaveToThumbnail(const char* yuv420p, int width, int height,
}
if (yuv420p) {
ScaleYUV420pToABGR((char*)yuv420p, width, height, thumbnail_width_,
thumbnail_height_, rgba_buffer_);
ScaleNv12ToABGR((char*)yuv420p, width, height, thumbnail_width_,
thumbnail_height_, rgba_buffer_);
} else {
// If yuv420p is null, fill the buffer with black pixels
memset(rgba_buffer_, 0x00, thumbnail_width_ * thumbnail_height_ * 4);

2
thirdparty/projectx vendored

Submodule thirdparty/projectx updated: c4607bef9f...9c5fc397de