static void vda_decoder_callback(void *vda_hw_ctx, CFDictionaryRef user_info, OSStatus status, uint32_t infoFlags, CVImageBufferRef image_buffer) { struct vda_context *vda_ctx = vda_hw_ctx; if (!image_buffer) return; if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer)) return; vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer); }