static int decode_dc_progressive(MJpegDecodeContext *s, int16_t *block, int component, int dc_index, uint16_t *quant_matrix, int Al) { int val; s->bdsp.clear_block(block); val = mjpeg_decode_dc(s, dc_index); if (val == 0xfffff) { av_log(s->avctx, AV_LOG_ERROR, "error dc\n"); return AVERROR_INVALIDDATA; } val = (val * (quant_matrix[0] << Al)) + s->last_dc[component]; s->last_dc[component] = val; block[0] = val; return 0; }