hdcd_analyze_prepare 1373 libavfilter/af_hdcd.c         hdcd_analyze_prepare(state, samples, count, stride);
hdcd_analyze_prepare 1416 libavfilter/af_hdcd.c         hdcd_analyze_prepare(&ctx->state[0], samples, count, stride);
hdcd_analyze_prepare 1417 libavfilter/af_hdcd.c         hdcd_analyze_prepare(&ctx->state[1], samples + 1, count, stride);