Function avifDecoderApplySampleTransform

src/read.c:6939–6970

}

static avifResult avifDecoderApplySampleTransform(const avifDecoder * decoder, avifImage * dstImage)
{
    if (dstImage->depth != decoder->data->meta->sampleTransformDepth) {
        AVIF_ASSERT_OR_RETURN(dstImage->yuvPlanes[0] != NULL);
        AVIF_ASSERT_OR_RETURN(dstImage->imageOwnsYUVPlanes);

        // Use a temporary buffer because dstImage may point to decoder->image, which could be an input image.
        avifImage * dstImageWithCorrectDepth =
            avifImageCreate(dstImage->width, dstImage->height, decoder->data->meta->sampleTransformDepth, dstImage->yuvFormat);
        AVIF_CHECKERR(dstImageWithCorrectDepth != NULL, AVIF_RESULT_OUT_OF_MEMORY);
        dstImageWithCorrectDepth->yuvRange = dstImage->yuvRange;
        avifResult result =
            avifImageAllocatePlanes(dstImageWithCorrectDepth, dstImage->alphaPlane != NULL ? AVIF_PLANES_ALL : AVIF_PLANES_YUV);
        if (result == AVIF_RESULT_OK) {
            result = avifDecoderApplySampleTransform(decoder, dstImageWithCorrectDepth);
            if (result == AVIF_RESULT_OK) {
                // Keep the same dstImage object rather than swapping decoder->image, in case the user already accessed it.
                avifImageFreePlanes(dstImage, AVIF_PLANES_ALL);
                dstImage->depth = dstImageWithCorrectDepth->depth;
                avifImageStealPlanes(dstImage, dstImageWithCorrectDepth, AVIF_PLANES_ALL);
            }
        }
        avifImageDestroy(dstImageWithCorrectDepth);
        return result;
    }

    AVIF_CHECKRES(avifDecoderApplySampleTransformForPlanes(decoder, AVIF_PLANES_YUV, dstImage));
    if (decoder->alphaPresent) {
        AVIF_CHECKRES(avifDecoderApplySampleTransformForPlanes(decoder, AVIF_PLANES_A, dstImage));
    }
    return AVIF_RESULT_OK;
}

avifResult avifDecoderNextImage(avifDecoder * decoder)
{