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Code Issues Releases Activity

EA IMA EACS decoder

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original patch by Peter Ross

Originally committed as revision 10880 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Peter Ross 2007-10-30 23:20:26 +00:00 committed by Aurelien Jacobs
parent 7bb65d8964
commit fac84d3c18
5 changed files with 24 additions and 0 deletions
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1
libavcodec/Makefile
View File

@ -276,6 +276,7 @@ OBJS-$(CONFIG_ADPCM_IMA_DK3_DECODER) += adpcm.o
OBJS-$(CONFIG_ADPCM_IMA_DK3_ENCODER) += adpcm.o
OBJS-$(CONFIG_ADPCM_IMA_DK4_DECODER) += adpcm.o
OBJS-$(CONFIG_ADPCM_IMA_DK4_ENCODER) += adpcm.o
OBJS-$(CONFIG_ADPCM_IMA_EA_EACS_DECODER) += adpcm.o
OBJS-$(CONFIG_ADPCM_IMA_EA_SEAD_DECODER) += adpcm.o
OBJS-$(CONFIG_ADPCM_IMA_QT_DECODER) += adpcm.o
OBJS-$(CONFIG_ADPCM_IMA_QT_ENCODER) += adpcm.o

20
libavcodec/adpcm.c
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@ -31,6 +31,7 @@
* CD-ROM XA ADPCM codec by BERO
* EA ADPCM decoder by Robin Kay (komadori@myrealbox.com)
* EA ADPCM R1/R2/R3 decoder by Peter Ross (pross@xvid.org)
* EA IMA EACS decoder by Peter Ross (pross@xvid.org)
* EA IMA SEAD decoder by Peter Ross (pross@xvid.org)
* THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl)
*
@ -1138,6 +1139,24 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
buf_size -= 128;
}
break;
case CODEC_ID_ADPCM_IMA_EA_EACS:
samples_in_chunk = bytestream_get_le32(&src) >> (1-st);
if (samples_in_chunk > buf_size-4-(8<<st)) {
src += buf_size - 4;
break;
}
for (i=0; i<=st; i++)
c->status[i].step_index = bytestream_get_le32(&src);
for (i=0; i<=st; i++)
c->status[i].predictor = bytestream_get_le32(&src);
for (; samples_in_chunk; samples_in_chunk--, src++) {
*samples++ = adpcm_ima_expand_nibble(&c->status[0], *src>>4, 3);
*samples++ = adpcm_ima_expand_nibble(&c->status[st], *src&0x0F, 3);
}
break;
case CODEC_ID_ADPCM_IMA_EA_SEAD:
for (; src < buf+buf_size; src++) {
*samples++ = adpcm_ima_expand_nibble(&c->status[0], src[0] >> 4, 6);
@ -1542,6 +1561,7 @@ ADPCM_CODEC(CODEC_ID_ADPCM_EA, adpcm_ea);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt);
ADPCM_CODEC(CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg);

1
libavcodec/allcodecs.c
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@ -254,6 +254,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (ADPCM_IMA_AMV, adpcm_ima_amv);
REGISTER_ENCDEC (ADPCM_IMA_DK3, adpcm_ima_dk3);
REGISTER_ENCDEC (ADPCM_IMA_DK4, adpcm_ima_dk4);
REGISTER_DECODER (ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs);
REGISTER_DECODER (ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead);
REGISTER_ENCDEC (ADPCM_IMA_QT, adpcm_ima_qt);
REGISTER_ENCDEC (ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg);

1
libavcodec/avcodec.h
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@ -215,6 +215,7 @@ enum CodecID {
CODEC_ID_ADPCM_EA_R3,
CODEC_ID_ADPCM_EA_R2,
CODEC_ID_ADPCM_IMA_EA_SEAD,
CODEC_ID_ADPCM_IMA_EA_EACS,
/* AMR */
CODEC_ID_AMR_NB= 0x12000,

1
libavformat/electronicarts.c
View File

@ -201,6 +201,7 @@ static int process_audio_header_eacs(AVFormatContext *s)
}
break;
case 1: ea->audio_codec = CODEC_ID_PCM_MULAW; ea->bytes = 1; break;
case 2: ea->audio_codec = CODEC_ID_ADPCM_IMA_EA_EACS; break;
default:
av_log (s, AV_LOG_ERROR, "unsupported stream type; audio compression_type=%i\n", compression_type);
}