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Yuv422 conversion fixes #131

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Merged
sundermann merged 2 commits into from
Feb 13, 2025
Merged

Yuv422 conversion fixes #131

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d8af34c
Add YUV422 to NV12 conversion
sundermann Feb 9, 2025
87ca30d
Fix UV plane order
sundermann Feb 10, 2025
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49 changes: 44 additions & 5 deletions unicapture/converter.c
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Original file line number Diff line number Diff line change
Expand Up @@ -99,10 +99,10 @@ int converter_run(converter_t* this, frame_info_t* input, frame_info_t* output,
I422ToARGB(
input->planes[0].buffer,
input->planes[0].stride,
this->buffers[2],
input->width / 2,
this->buffers[1],
input->width / 2,
this->buffers[2],
input->width / 2,
output->planes[0].buffer,
output->planes[0].stride,
output->width,
Expand Down Expand Up @@ -155,8 +155,47 @@ int converter_run(converter_t* this, frame_info_t* input, frame_info_t* output,
output->width,
output->height);
return 0;
} else {
// Only support ARGB for now...
return -1;
}

if (target_format == PIXFMT_YUV420_SEMI_PLANAR && input->pixel_format == PIXFMT_YUV422_SEMI_PLANAR) {
this->buffers[0] = realloc(this->buffers[0], input->planes[0].stride * input->height); // Y
this->buffers[1] = realloc(this->buffers[1], input->width / 2 * input->height); // U
this->buffers[2] = realloc(this->buffers[2], input->width / 2 * input->height); // V
this->buffers[3] = realloc(this->buffers[3], input->width / 2 * input->height); // UV
SplitUVPlane(
input->planes[1].buffer,
input->planes[1].stride,
this->buffers[1],
input->width / 2,
this->buffers[2],
input->width / 2,
input->width / 2,
input->height);

// Passing the UV plane as VU to I422ToNV21 to convert to NV12
I422ToNV21(
input->planes[0].buffer,
input->planes[0].stride,
this->buffers[2],
input->width / 2,
this->buffers[1],
input->width / 2,
this->buffers[0],
input->planes[0].stride,
this->buffers[3],
input->width,
input->width,
input->height);

output->width = input->width;
output->height = input->height;

output->planes[0].buffer = this->buffers[0];
output->planes[0].stride = input->planes[0].stride;
output->planes[1].buffer = this->buffers[3];
output->planes[1].stride = input->width;
output->pixel_format = PIXFMT_YUV420_SEMI_PLANAR;
}

return -1;
}