FFmpeg
Data Structures | Macros | Functions | Variables
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"

Go to the source code of this file.

Data Structures

struct  ADPCMDecodeContext
 

Macros

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

Functions

static av_cold int adpcm_decode_init (AVCodecContext *avctx)
 
static int16_t adpcm_agm_expand_nibble (ADPCMChannelStatus *c, int8_t nibble)
 
static int16_t adpcm_ima_expand_nibble (ADPCMChannelStatus *c, int8_t nibble, int shift)
 
static int16_t adpcm_ima_wav_expand_nibble (ADPCMChannelStatus *c, GetBitContext *gb, int bps)
 
static int adpcm_ima_qt_expand_nibble (ADPCMChannelStatus *c, int nibble, int shift)
 
static int16_t adpcm_ms_expand_nibble (ADPCMChannelStatus *c, int nibble)
 
static int16_t adpcm_ima_oki_expand_nibble (ADPCMChannelStatus *c, int nibble)
 
static int16_t adpcm_ct_expand_nibble (ADPCMChannelStatus *c, int8_t nibble)
 
static int16_t adpcm_sbpro_expand_nibble (ADPCMChannelStatus *c, int8_t nibble, int size, int shift)
 
static int16_t adpcm_yamaha_expand_nibble (ADPCMChannelStatus *c, uint8_t nibble)
 
static int16_t adpcm_mtaf_expand_nibble (ADPCMChannelStatus *c, uint8_t nibble)
 
static int16_t adpcm_zork_expand_nibble (ADPCMChannelStatus *c, uint8_t nibble)
 
static int xa_decode (AVCodecContext *avctx, int16_t *out0, int16_t *out1, const uint8_t *in, ADPCMChannelStatus *left, ADPCMChannelStatus *right, int channels, int sample_offset)
 
static void adpcm_swf_decode (AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
 
static int16_t adpcm_argo_expand_nibble (ADPCMChannelStatus *cs, int nibble, int control, int shift)
 
static int get_nb_samples (AVCodecContext *avctx, GetByteContext *gb, int buf_size, int *coded_samples, int *approx_nb_samples)
 Get the number of samples that will be decoded from the packet. More...
 
static int adpcm_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
 
static void adpcm_flush (AVCodecContext *avctx)
 
 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_AGM, sample_fmts_s16, adpcm_agm,"ADPCM AmuseGraphics Movie")
 
 ADPCM_DECODER (AV_CODEC_ID_ADPCM_AICA, sample_fmts_s16p, adpcm_aica,"ADPCM Yamaha AICA")
 
 ADPCM_DECODER (AV_CODEC_ID_ADPCM_ARGO, sample_fmts_s16p, adpcm_argo,"ADPCM Argonaut Games")
 
 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_SSI, sample_fmts_s16, adpcm_ima_ssi,"ADPCM IMA Simon & Schuster Interactive")
 
 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_both, 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")
 
 ADPCM_DECODER (AV_CODEC_ID_ADPCM_ZORK, sample_fmts_s16, adpcm_zork,"ADPCM Zork")
 

Variables

static const int8_t xa_adpcm_table [5][2]
 
static const int16_t ea_adpcm_table []
 
static const int8_t swf_index_tables [4][16]
 
static const int8_t zork_index_table [8]
 
static enum AVSampleFormat sample_fmts_s16 []
 
static enum AVSampleFormat sample_fmts_s16p []
 
static enum AVSampleFormat sample_fmts_both []
 

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/

Definition in file adpcm.c.

Macro Definition Documentation

#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; \
}

Referenced by adpcm_decode_frame().

#define THP_GET16 (   g)
Value:
avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
bytestream2_get_le16u(&(g)) : \
bytestream2_get_be16u(&(g)), 16)
const char * g
Definition: vf_curves.c:115
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130

Referenced by adpcm_decode_frame().

#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), \
.capabilities = AV_CODEC_CAP_DR1, \
.sample_fmts = sample_fmts_, \
}
static void flush(AVCodecContext *avctx)
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AVCodec.
Definition: avcodec.h:3510
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
static av_cold int adpcm_decode_init(AVCodecContext *avctx)
Definition: adpcm.c:98
static void adpcm_flush(AVCodecContext *avctx)
Definition: adpcm.c:1923
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
const char * name
Name of the codec implementation.
Definition: avcodec.h:3517
static int adpcm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: adpcm.c:838
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:992

Definition at line 1938 of file adpcm.c.

Function Documentation

static av_cold int adpcm_decode_init ( AVCodecContext avctx)
static

Definition at line 98 of file adpcm.c.

static int16_t adpcm_agm_expand_nibble ( ADPCMChannelStatus c,
int8_t  nibble 
)
inlinestatic

Definition at line 204 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int16_t adpcm_ima_expand_nibble ( ADPCMChannelStatus c,
int8_t  nibble,
int  shift 
)
inlinestatic

Definition at line 248 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int16_t adpcm_ima_wav_expand_nibble ( ADPCMChannelStatus c,
GetBitContext gb,
int  bps 
)
inlinestatic

Definition at line 274 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int adpcm_ima_qt_expand_nibble ( ADPCMChannelStatus c,
int  nibble,
int  shift 
)
inlinestatic

Definition at line 297 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int16_t adpcm_ms_expand_nibble ( ADPCMChannelStatus c,
int  nibble 
)
inlinestatic

Definition at line 323 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int16_t adpcm_ima_oki_expand_nibble ( ADPCMChannelStatus c,
int  nibble 
)
inlinestatic

Definition at line 342 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int16_t adpcm_ct_expand_nibble ( ADPCMChannelStatus c,
int8_t  nibble 
)
inlinestatic

Definition at line 363 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int16_t adpcm_sbpro_expand_nibble ( ADPCMChannelStatus c,
int8_t  nibble,
int  size,
int  shift 
)
inlinestatic

Definition at line 384 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int16_t adpcm_yamaha_expand_nibble ( ADPCMChannelStatus c,
uint8_t  nibble 
)
inlinestatic

Definition at line 404 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int16_t adpcm_mtaf_expand_nibble ( ADPCMChannelStatus c,
uint8_t  nibble 
)
inlinestatic

Definition at line 418 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int16_t adpcm_zork_expand_nibble ( ADPCMChannelStatus c,
uint8_t  nibble 
)
inlinestatic

Definition at line 427 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int xa_decode ( AVCodecContext avctx,
int16_t *  out0,
int16_t *  out1,
const uint8_t in,
ADPCMChannelStatus left,
ADPCMChannelStatus right,
int  channels,
int  sample_offset 
)
static

Definition at line 462 of file adpcm.c.

Referenced by adpcm_decode_frame().

static void adpcm_swf_decode ( AVCodecContext avctx,
const uint8_t buf,
int  buf_size,
int16_t *  samples 
)
static

Definition at line 542 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int16_t adpcm_argo_expand_nibble ( ADPCMChannelStatus cs,
int  nibble,
int  control,
int  shift 
)
inlinestatic

Definition at line 599 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int get_nb_samples ( AVCodecContext avctx,
GetByteContext gb,
int  buf_size,
int coded_samples,
int approx_nb_samples 
)
static

Get the number of samples that will be decoded from the packet.

In one case, this is actually the maximum number of samples possible to decode with the given buf_size.

Parameters
[out]coded_samplesset to the number of samples as coded in the packet, or 0 if the codec does not encode the number of samples in each frame.
[out]approx_nb_samplesset to non-zero if the number of samples returned is an approximation.

Definition at line 627 of file adpcm.c.

Referenced by adpcm_decode_frame().

static int adpcm_decode_frame ( AVCodecContext avctx,
void data,
int got_frame_ptr,
AVPacket avpkt 
)
static

Definition at line 838 of file adpcm.c.

static void adpcm_flush ( AVCodecContext avctx)
static

Definition at line 1923 of file adpcm.c.

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_AGM  ,
sample_fmts_s16  ,
adpcm_agm  ,
"ADPCM AmuseGraphics Movie"   
)
ADPCM_DECODER ( AV_CODEC_ID_ADPCM_AICA  ,
sample_fmts_s16p  ,
adpcm_aica  ,
"ADPCM Yamaha AICA"   
)
ADPCM_DECODER ( AV_CODEC_ID_ADPCM_ARGO  ,
sample_fmts_s16p  ,
adpcm_argo  ,
"ADPCM Argonaut Games"   
)
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_SSI  ,
sample_fmts_s16  ,
adpcm_ima_ssi  ,
"ADPCM IMA Simon & Schuster Interactive"   
)
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_both  ,
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"   
)
ADPCM_DECODER ( AV_CODEC_ID_ADPCM_ZORK  ,
sample_fmts_s16  ,
adpcm_zork  ,
"ADPCM Zork"   
)

Variable Documentation

const int8_t xa_adpcm_table[5][2]
static
Initial value:
= {
{ 0, 0 },
{ 60, 0 },
{ 115, -52 },
{ 98, -55 },
{ 122, -60 }
}

Definition at line 62 of file adpcm.c.

Referenced by adpcm_decode_frame(), and xa_decode().

const int16_t ea_adpcm_table[]
static
Initial value:
= {
0, 240, 460, 392,
0, 0, -208, -220,
0, 1, 3, 4,
7, 8, 10, 11,
0, -1, -3, -4
}

Definition at line 70 of file adpcm.c.

Referenced by adpcm_decode_frame().

const int8_t swf_index_tables[4][16]
static
Initial value:
= {
{ -1, 2 },
{ -1, -1, 2, 4 },
{ -1, -1, -1, -1, 2, 4, 6, 8 },
{ -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16 }
}

Definition at line 79 of file adpcm.c.

Referenced by adpcm_swf_decode().

const int8_t zork_index_table[8]
static
Initial value:
= {
-1, -1, -1, 1, 4, 7, 10, 12,
}

Definition at line 86 of file adpcm.c.

Referenced by adpcm_zork_expand_nibble().

enum AVSampleFormat sample_fmts_s16[]
static
Initial value:

Definition at line 1930 of file adpcm.c.

enum AVSampleFormat sample_fmts_s16p[]
static
Initial value:

Definition at line 1932 of file adpcm.c.

enum AVSampleFormat sample_fmts_both[]
static
Initial value:

Definition at line 1934 of file adpcm.c.