AV_MATRIX_ENCODING_DOLBYHEADPHONE 1582 libavcodec/ac3dec.c             matrix_encoding = AV_MATRIX_ENCODING_DOLBYHEADPHONE;
AV_MATRIX_ENCODING_DOLBYHEADPHONE  454 libavcodec/mlpdec.c                 m->substream[0].matrix_encoding = AV_MATRIX_ENCODING_DOLBYHEADPHONE;
AV_MATRIX_ENCODING_DOLBYHEADPHONE   76 libavfilter/af_ashowinfo.c     case AV_MATRIX_ENCODING_DOLBYHEADPHONE: av_log(ctx, AV_LOG_INFO, "Dolby Headphone");     break;