FFmpeg
Data Structures | Macros | Functions | Variables
adpcm.c File Reference
#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 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 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_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")
 

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 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

◆ 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)

◆ 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_, \
}

Definition at line 1787 of file adpcm.c.

Function Documentation

◆ adpcm_decode_init()

static av_cold int adpcm_decode_init ( AVCodecContext *  avctx)
static

Definition at line 92 of file adpcm.c.

◆ adpcm_agm_expand_nibble()

static int16_t adpcm_agm_expand_nibble ( ADPCMChannelStatus *  c,
int8_t  nibble 
)
inlinestatic

Definition at line 184 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_ima_expand_nibble()

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

Definition at line 228 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_ima_wav_expand_nibble()

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

Definition at line 254 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_ima_qt_expand_nibble()

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

Definition at line 277 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_ms_expand_nibble()

static int16_t adpcm_ms_expand_nibble ( ADPCMChannelStatus *  c,
int  nibble 
)
inlinestatic

Definition at line 303 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_ima_oki_expand_nibble()

static int16_t adpcm_ima_oki_expand_nibble ( ADPCMChannelStatus *  c,
int  nibble 
)
inlinestatic

Definition at line 322 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_ct_expand_nibble()

static int16_t adpcm_ct_expand_nibble ( ADPCMChannelStatus *  c,
int8_t  nibble 
)
inlinestatic

Definition at line 343 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_sbpro_expand_nibble()

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

Definition at line 364 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_yamaha_expand_nibble()

static int16_t adpcm_yamaha_expand_nibble ( ADPCMChannelStatus *  c,
uint8_t  nibble 
)
inlinestatic

Definition at line 384 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_mtaf_expand_nibble()

static int16_t adpcm_mtaf_expand_nibble ( ADPCMChannelStatus *  c,
uint8_t  nibble 
)
inlinestatic

Definition at line 398 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ xa_decode()

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 407 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_swf_decode()

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

Definition at line 495 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ get_nb_samples()

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 563 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ adpcm_decode_frame()

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

Definition at line 765 of file adpcm.c.

◆ adpcm_flush()

static void adpcm_flush ( AVCodecContext *  avctx)
static

Definition at line 1772 of file adpcm.c.

◆ ADPCM_DECODER() [1/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_4XM  ,
sample_fmts_s16p  ,
adpcm_4xm  ,
"ADPCM 4X Movie"   
)

◆ ADPCM_DECODER() [2/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_AFC  ,
sample_fmts_s16p  ,
adpcm_afc  ,
"ADPCM Nintendo Gamecube AFC"   
)

◆ ADPCM_DECODER() [3/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_AGM  ,
sample_fmts_s16  ,
adpcm_agm  ,
"ADPCM AmuseGraphics Movie"   
)

◆ ADPCM_DECODER() [4/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_AICA  ,
sample_fmts_s16p  ,
adpcm_aica  ,
"ADPCM Yamaha AICA"   
)

◆ ADPCM_DECODER() [5/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_CT  ,
sample_fmts_s16  ,
adpcm_ct  ,
"ADPCM Creative Technology"   
)

◆ ADPCM_DECODER() [6/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_DTK  ,
sample_fmts_s16p  ,
adpcm_dtk  ,
"ADPCM Nintendo Gamecube DTK"   
)

◆ ADPCM_DECODER() [7/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_EA  ,
sample_fmts_s16  ,
adpcm_ea  ,
"ADPCM Electronic Arts"   
)

◆ ADPCM_DECODER() [8/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_EA_MAXIS_XA  ,
sample_fmts_s16  ,
adpcm_ea_maxis_xa  ,
"ADPCM Electronic Arts Maxis CDROM XA"   
)

◆ ADPCM_DECODER() [9/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_EA_R1  ,
sample_fmts_s16p  ,
adpcm_ea_r1  ,
"ADPCM Electronic Arts R1"   
)

◆ ADPCM_DECODER() [10/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_EA_R2  ,
sample_fmts_s16p  ,
adpcm_ea_r2  ,
"ADPCM Electronic Arts R2"   
)

◆ ADPCM_DECODER() [11/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_EA_R3  ,
sample_fmts_s16p  ,
adpcm_ea_r3  ,
"ADPCM Electronic Arts R3"   
)

◆ ADPCM_DECODER() [12/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_EA_XAS  ,
sample_fmts_s16p  ,
adpcm_ea_xas  ,
"ADPCM Electronic Arts XAS"   
)

◆ ADPCM_DECODER() [13/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_AMV  ,
sample_fmts_s16  ,
adpcm_ima_amv  ,
"ADPCM IMA AMV"   
)

◆ ADPCM_DECODER() [14/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_APC  ,
sample_fmts_s16  ,
adpcm_ima_apc  ,
"ADPCM IMA CRYO APC"   
)

◆ ADPCM_DECODER() [15/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_DAT4  ,
sample_fmts_s16  ,
adpcm_ima_dat4  ,
"ADPCM IMA Eurocom DAT4"   
)

◆ ADPCM_DECODER() [16/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_DK3  ,
sample_fmts_s16  ,
adpcm_ima_dk3  ,
"ADPCM IMA Duck DK3"   
)

◆ ADPCM_DECODER() [17/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_DK4  ,
sample_fmts_s16  ,
adpcm_ima_dk4  ,
"ADPCM IMA Duck DK4"   
)

◆ ADPCM_DECODER() [18/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_EA_EACS  ,
sample_fmts_s16  ,
adpcm_ima_ea_eacs  ,
"ADPCM IMA Electronic Arts EACS"   
)

◆ ADPCM_DECODER() [19/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_EA_SEAD  ,
sample_fmts_s16  ,
adpcm_ima_ea_sead  ,
"ADPCM IMA Electronic Arts SEAD"   
)

◆ ADPCM_DECODER() [20/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_ISS  ,
sample_fmts_s16  ,
adpcm_ima_iss  ,
"ADPCM IMA Funcom ISS"   
)

◆ ADPCM_DECODER() [21/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_OKI  ,
sample_fmts_s16  ,
adpcm_ima_oki  ,
"ADPCM IMA Dialogic OKI"   
)

◆ ADPCM_DECODER() [22/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_QT  ,
sample_fmts_s16p  ,
adpcm_ima_qt  ,
"ADPCM IMA QuickTime"   
)

◆ ADPCM_DECODER() [23/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_RAD  ,
sample_fmts_s16  ,
adpcm_ima_rad  ,
"ADPCM IMA Radical"   
)

◆ ADPCM_DECODER() [24/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_SMJPEG  ,
sample_fmts_s16  ,
adpcm_ima_smjpeg  ,
"ADPCM IMA Loki SDL MJPEG"   
)

◆ ADPCM_DECODER() [25/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_WAV  ,
sample_fmts_s16p  ,
adpcm_ima_wav  ,
"ADPCM IMA WAV"   
)

◆ ADPCM_DECODER() [26/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_IMA_WS  ,
sample_fmts_both  ,
adpcm_ima_ws  ,
"ADPCM IMA Westwood"   
)

◆ ADPCM_DECODER() [27/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_MS  ,
sample_fmts_s16  ,
adpcm_ms  ,
"ADPCM Microsoft"   
)

◆ ADPCM_DECODER() [28/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_MTAF  ,
sample_fmts_s16p  ,
adpcm_mtaf  ,
"ADPCM MTAF"   
)

◆ ADPCM_DECODER() [29/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_PSX  ,
sample_fmts_s16p  ,
adpcm_psx  ,
"ADPCM Playstation"   
)

◆ ADPCM_DECODER() [30/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_SBPRO_2  ,
sample_fmts_s16  ,
adpcm_sbpro_2  ,
"ADPCM Sound Blaster Pro 2-bit"   
)

◆ ADPCM_DECODER() [31/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_SBPRO_3  ,
sample_fmts_s16  ,
adpcm_sbpro_3  ,
"ADPCM Sound Blaster Pro 2.6-bit"   
)

◆ ADPCM_DECODER() [32/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_SBPRO_4  ,
sample_fmts_s16  ,
adpcm_sbpro_4  ,
"ADPCM Sound Blaster Pro 4-bit"   
)

◆ ADPCM_DECODER() [33/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_SWF  ,
sample_fmts_s16  ,
adpcm_swf  ,
"ADPCM Shockwave Flash"   
)

◆ ADPCM_DECODER() [34/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_THP_LE  ,
sample_fmts_s16p  ,
adpcm_thp_le  ,
"ADPCM Nintendo THP (little-endian)"   
)

◆ ADPCM_DECODER() [35/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_THP  ,
sample_fmts_s16p  ,
adpcm_thp  ,
"ADPCM Nintendo THP"   
)

◆ ADPCM_DECODER() [36/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_XA  ,
sample_fmts_s16p  ,
adpcm_xa  ,
"ADPCM CDROM XA"   
)

◆ ADPCM_DECODER() [37/37]

ADPCM_DECODER ( AV_CODEC_ID_ADPCM_YAMAHA  ,
sample_fmts_s16  ,
adpcm_yamaha  ,
"ADPCM Yamaha"   
)

Variable Documentation

◆ xa_adpcm_table

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

Definition at line 60 of file adpcm.c.

Referenced by adpcm_decode_frame(), and xa_decode().

◆ ea_adpcm_table

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 68 of file adpcm.c.

Referenced by adpcm_decode_frame().

◆ swf_index_tables

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 77 of file adpcm.c.

Referenced by adpcm_swf_decode().

◆ sample_fmts_s16

enum AVSampleFormat sample_fmts_s16[]
static
Initial value:
= { AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_NONE }

Definition at line 1779 of file adpcm.c.

◆ sample_fmts_s16p

enum AVSampleFormat sample_fmts_s16p[]
static
Initial value:
= { AV_SAMPLE_FMT_S16P,
AV_SAMPLE_FMT_NONE }

Definition at line 1781 of file adpcm.c.

◆ sample_fmts_both

enum AVSampleFormat sample_fmts_both[]
static
Initial value:
= { AV_SAMPLE_FMT_S16,
AV_SAMPLE_FMT_S16P,
AV_SAMPLE_FMT_NONE }

Definition at line 1783 of file adpcm.c.

AVCodec
AVCodec.
Definition: avcodec.h:3481
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:686
AV_CODEC_ID_ADPCM_THP_LE
@ AV_CODEC_ID_ADPCM_THP_LE
Definition: avcodec.h:539
adpcm_flush
static void adpcm_flush(AVCodecContext *avctx)
Definition: adpcm.c:1772
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
g
const char * g
Definition: vf_curves.c:115
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:500
ADPCMDecodeContext
Definition: adpcm.c:86
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:981
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:188
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:67
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:61
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3488
sign_extend
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
adpcm_decode_init
static av_cold int adpcm_decode_init(AVCodecContext *avctx)
Definition: adpcm.c:92
adpcm_decode_frame
static int adpcm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: adpcm.c:765
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