CODEC_ID_ADPCM_4XM  998 libavcodec/adpcm.c     case CODEC_ID_ADPCM_4XM:
CODEC_ID_ADPCM_4XM 1665 libavcodec/adpcm.c ADPCM_DECODER(CODEC_ID_ADPCM_4XM, adpcm_4xm, "ADPCM 4X Movie");
CODEC_ID_ADPCM_4XM  210 libavformat/4xm.c                 st->codec->codec_id = CODEC_ID_ADPCM_4XM;