adpcm.c File Reference

ADPCM decoders Features and limitations: More...

#include "avcodec.h"
#include "get_bits.h"
#include "bytestream.h"
#include "adpcm.h"
#include "adpcm_data.h"
#include "internal.h"

Classes
struct	ADPCMDecodeContext

Macros
#define	DK3_GET_NEXT_NIBBLE()
#define	THP_GET16(g)
#define	ADPCM_DECODER(id_, sample_fmts_, name_, long_name_)

Typedefs
typedef struct ADPCMDecodeContext	ADPCMDecodeContext

Functions
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_AICA, sample_fmts_s16p, adpcm_aica, "ADPCM Yamaha AICA")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_DAT4, sample_fmts_s16, adpcm_ima_dat4, "ADPCM IMA Eurocom DAT4")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_MS, sample_fmts_s16, adpcm_ms, "ADPCM Microsoft")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_MTAF, sample_fmts_s16p, adpcm_mtaf, "ADPCM MTAF")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_PSX, sample_fmts_s16p, adpcm_psx, "ADPCM Playstation")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_THP_LE, sample_fmts_s16p, adpcm_thp_le, "ADPCM Nintendo THP (little-endian)")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo THP")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA")
	ADPCM_DECODER (AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha")

Detailed Description

ADPCM decoders Features and limitations:

Reference documents: http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs http://www.pcisys.net/~melanson/codecs/simpleaudio.html [dead] http://www.geocities.com/SiliconValley/8682/aud3.txt [dead] http://openquicktime.sourceforge.net/ XAnim sources (xa_codec.c) http://xanim.polter.net/ http://www.cs.ucla.edu/~leec/mediabench/applications.html [dead] SoX source code http://sox.sourceforge.net/

CD-ROM XA: http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html [dead] vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html [dead] readstr http://www.geocities.co.jp/Playtown/2004/

Macro Definition Documentation

ADPCM_DECODER

#define ADPCM_DECODER	(		id_,
			sample_fmts_,
			name_,
			long_name_
	)

Value:

AVCodec ff_ ## name_ ## _decoder = {                        \
    .name           = #name_,                               \
    .long_name      = NULL_IF_CONFIG_SMALL(long_name_),     \
    .type           = AVMEDIA_TYPE_AUDIO,                   \
    .id             = id_,                                  \
    .priv_data_size = sizeof(ADPCMDecodeContext),           \
    .init           = adpcm_decode_init,                    \
    .decode         = adpcm_decode_frame,                   \
    .flush          = adpcm_flush,                          \
    .capabilities   = AV_CODEC_CAP_DR1,                     \
    .sample_fmts    = sample_fmts_,                         \
}

DK3_GET_NEXT_NIBBLE

#define DK3_GET_NEXT_NIBBLE

(

)

Value:

if (decode_top_nibble_next) { \
        nibble = last_byte >> 4; \
        decode_top_nibble_next = 0; \
    } else { \
        last_byte = bytestream2_get_byteu(&gb); \
        nibble = last_byte & 0x0F; \
        decode_top_nibble_next = 1; \
    }

THP_GET16

#define THP_GET16

(

g

)

Value:

sign_extend( \
        avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
        bytestream2_get_le16u(&(g)) : \
        bytestream2_get_be16u(&(g)), 16)