#include "avcodec.h"
#include "get_bits.h"
#include "put_bits.h"
#include "bytestream.h"
#include "adpcm.h"
#include "adpcm_data.h"
Go to the source code of this file.
Data Structures | |
struct | ADPCMDecodeContext |
Defines | |
#define | DK3_GET_NEXT_NIBBLE() |
#define | ADPCM_DECODER(id_, name_, long_name_) |
Functions | |
static av_cold int | adpcm_decode_init (AVCodecContext *avctx) |
static short | adpcm_ima_expand_nibble (ADPCMChannelStatus *c, char nibble, int shift) |
static int | adpcm_ima_qt_expand_nibble (ADPCMChannelStatus *c, int nibble, int shift) |
static short | adpcm_ms_expand_nibble (ADPCMChannelStatus *c, char nibble) |
static short | adpcm_ct_expand_nibble (ADPCMChannelStatus *c, char nibble) |
static short | adpcm_sbpro_expand_nibble (ADPCMChannelStatus *c, char nibble, int size, int shift) |
static short | adpcm_yamaha_expand_nibble (ADPCMChannelStatus *c, unsigned char nibble) |
static void | xa_decode (short *out, const unsigned char *in, ADPCMChannelStatus *left, ADPCMChannelStatus *right, int inc) |
static int | get_nb_samples (AVCodecContext *avctx, const uint8_t *buf, int buf_size, int *coded_samples) |
Get the number of samples that will be decoded from the packet. | |
static int | adpcm_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt) |
ADPCM_DECODER (CODEC_ID_ADPCM_4XM, adpcm_4xm,"ADPCM 4X Movie") | |
ADPCM_DECODER (CODEC_ID_ADPCM_CT, adpcm_ct,"ADPCM Creative Technology") | |
ADPCM_DECODER (CODEC_ID_ADPCM_EA, adpcm_ea,"ADPCM Electronic Arts") | |
ADPCM_DECODER (CODEC_ID_ADPCM_EA_MAXIS_XA, adpcm_ea_maxis_xa,"ADPCM Electronic Arts Maxis CDROM XA") | |
ADPCM_DECODER (CODEC_ID_ADPCM_EA_R1, adpcm_ea_r1,"ADPCM Electronic Arts R1") | |
ADPCM_DECODER (CODEC_ID_ADPCM_EA_R2, adpcm_ea_r2,"ADPCM Electronic Arts R2") | |
ADPCM_DECODER (CODEC_ID_ADPCM_EA_R3, adpcm_ea_r3,"ADPCM Electronic Arts R3") | |
ADPCM_DECODER (CODEC_ID_ADPCM_EA_XAS, adpcm_ea_xas,"ADPCM Electronic Arts XAS") | |
ADPCM_DECODER (CODEC_ID_ADPCM_IMA_AMV, adpcm_ima_amv,"ADPCM IMA AMV") | |
ADPCM_DECODER (CODEC_ID_ADPCM_IMA_DK3, adpcm_ima_dk3,"ADPCM IMA Duck DK3") | |
ADPCM_DECODER (CODEC_ID_ADPCM_IMA_DK4, adpcm_ima_dk4,"ADPCM IMA Duck DK4") | |
ADPCM_DECODER (CODEC_ID_ADPCM_IMA_EA_EACS, adpcm_ima_ea_eacs,"ADPCM IMA Electronic Arts EACS") | |
ADPCM_DECODER (CODEC_ID_ADPCM_IMA_EA_SEAD, adpcm_ima_ea_sead,"ADPCM IMA Electronic Arts SEAD") | |
ADPCM_DECODER (CODEC_ID_ADPCM_IMA_ISS, adpcm_ima_iss,"ADPCM IMA Funcom ISS") | |
ADPCM_DECODER (CODEC_ID_ADPCM_IMA_QT, adpcm_ima_qt,"ADPCM IMA QuickTime") | |
ADPCM_DECODER (CODEC_ID_ADPCM_IMA_SMJPEG, adpcm_ima_smjpeg,"ADPCM IMA Loki SDL MJPEG") | |
ADPCM_DECODER (CODEC_ID_ADPCM_IMA_WAV, adpcm_ima_wav,"ADPCM IMA WAV") | |
ADPCM_DECODER (CODEC_ID_ADPCM_IMA_WS, adpcm_ima_ws,"ADPCM IMA Westwood") | |
ADPCM_DECODER (CODEC_ID_ADPCM_MS, adpcm_ms,"ADPCM Microsoft") | |
ADPCM_DECODER (CODEC_ID_ADPCM_SBPRO_2, adpcm_sbpro_2,"ADPCM Sound Blaster Pro 2-bit") | |
ADPCM_DECODER (CODEC_ID_ADPCM_SBPRO_3, adpcm_sbpro_3,"ADPCM Sound Blaster Pro 2.6-bit") | |
ADPCM_DECODER (CODEC_ID_ADPCM_SBPRO_4, adpcm_sbpro_4,"ADPCM Sound Blaster Pro 4-bit") | |
ADPCM_DECODER (CODEC_ID_ADPCM_SWF, adpcm_swf,"ADPCM Shockwave Flash") | |
ADPCM_DECODER (CODEC_ID_ADPCM_THP, adpcm_thp,"ADPCM Nintendo Gamecube THP") | |
ADPCM_DECODER (CODEC_ID_ADPCM_XA, adpcm_xa,"ADPCM CDROM XA") | |
ADPCM_DECODER (CODEC_ID_ADPCM_YAMAHA, adpcm_yamaha,"ADPCM Yamaha") | |
Variables | |
static const int | xa_adpcm_table [5][2] |
static const int | ea_adpcm_table [] |
static const int | swf_index_tables [4][16] |
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.
#define ADPCM_DECODER | ( | id_, | |||
name_, | |||||
long_name_ | ) |
Value:
AVCodec ff_ ## name_ ## _decoder = { \ .name = #name_, \ .type = AVMEDIA_TYPE_AUDIO, \ .id = id_, \ .priv_data_size = sizeof(ADPCMDecodeContext), \ .init = adpcm_decode_init, \ .decode = adpcm_decode_frame, \ .capabilities = CODEC_CAP_DR1, \ .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ }
#define DK3_GET_NEXT_NIBBLE | ( | ) |
Value:
if (decode_top_nibble_next) \ { \ nibble = last_byte >> 4; \ decode_top_nibble_next = 0; \ } \ else \ { \ if (end_of_packet) \ break; \ last_byte = *src++; \ if (src >= buf + buf_size) \ end_of_packet = 1; \ nibble = last_byte & 0x0F; \ decode_top_nibble_next = 1; \ }
Definition at line 496 of file adpcm.c.
Referenced by adpcm_decode_frame().
static short adpcm_ct_expand_nibble | ( | ADPCMChannelStatus * | c, | |
char | nibble | |||
) | [inline, static] |
static int adpcm_decode_frame | ( | AVCodecContext * | avctx, | |
void * | data, | |||
int * | got_frame_ptr, | |||
AVPacket * | avpkt | |||
) | [static] |
static av_cold int adpcm_decode_init | ( | AVCodecContext * | avctx | ) | [static] |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_YAMAHA | , | |
adpcm_yamaha | , | |||
"ADPCM Yamaha" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_XA | , | |
adpcm_xa | , | |||
"ADPCM CDROM XA" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_THP | , | |
adpcm_thp | , | |||
"ADPCM Nintendo Gamecube THP" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_SWF | , | |
adpcm_swf | , | |||
"ADPCM Shockwave Flash" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_SBPRO_4 | , | |
adpcm_sbpro_4 | , | |||
"ADPCM Sound Blaster Pro 4-bit" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_SBPRO_3 | , | |
adpcm_sbpro_3 | , | |||
"ADPCM Sound Blaster Pro 2.6-bit" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_SBPRO_2 | , | |
adpcm_sbpro_2 | , | |||
"ADPCM Sound Blaster Pro 2-bit" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_MS | , | |
adpcm_ms | , | |||
"ADPCM Microsoft" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_IMA_WS | , | |
adpcm_ima_ws | , | |||
"ADPCM IMA Westwood" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_IMA_WAV | , | |
adpcm_ima_wav | , | |||
"ADPCM IMA WAV" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_IMA_SMJPEG | , | |
adpcm_ima_smjpeg | , | |||
"ADPCM IMA Loki SDL MJPEG" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_IMA_QT | , | |
adpcm_ima_qt | , | |||
"ADPCM IMA QuickTime" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_IMA_ISS | , | |
adpcm_ima_iss | , | |||
"ADPCM IMA Funcom ISS" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_IMA_EA_SEAD | , | |
adpcm_ima_ea_sead | , | |||
"ADPCM IMA Electronic Arts SEAD" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_IMA_EA_EACS | , | |
adpcm_ima_ea_eacs | , | |||
"ADPCM IMA Electronic Arts EACS" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_IMA_DK4 | , | |
adpcm_ima_dk4 | , | |||
"ADPCM IMA Duck DK4" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_IMA_DK3 | , | |
adpcm_ima_dk3 | , | |||
"ADPCM IMA Duck DK3" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_IMA_AMV | , | |
adpcm_ima_amv | , | |||
"ADPCM IMA AMV" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_EA_XAS | , | |
adpcm_ea_xas | , | |||
"ADPCM Electronic Arts XAS" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_EA_R3 | , | |
adpcm_ea_r3 | , | |||
"ADPCM Electronic Arts R3" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_EA_R2 | , | |
adpcm_ea_r2 | , | |||
"ADPCM Electronic Arts R2" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_EA_R1 | , | |
adpcm_ea_r1 | , | |||
"ADPCM Electronic Arts R1" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_EA_MAXIS_XA | , | |
adpcm_ea_maxis_xa | , | |||
"ADPCM Electronic Arts Maxis CDROM XA" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_EA | , | |
adpcm_ea | , | |||
"ADPCM Electronic Arts" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_CT | , | |
adpcm_ct | , | |||
"ADPCM Creative Technology" | ||||
) |
ADPCM_DECODER | ( | CODEC_ID_ADPCM_4XM | , | |
adpcm_4xm | , | |||
"ADPCM 4X Movie" | ||||
) |
static short adpcm_ima_expand_nibble | ( | ADPCMChannelStatus * | c, | |
char | nibble, | |||
int | shift | |||
) | [inline, static] |
static int adpcm_ima_qt_expand_nibble | ( | ADPCMChannelStatus * | c, | |
int | nibble, | |||
int | shift | |||
) | [inline, static] |
static short adpcm_ms_expand_nibble | ( | ADPCMChannelStatus * | c, | |
char | nibble | |||
) | [inline, static] |
static short adpcm_sbpro_expand_nibble | ( | ADPCMChannelStatus * | c, | |
char | nibble, | |||
int | size, | |||
int | shift | |||
) | [inline, static] |
static short adpcm_yamaha_expand_nibble | ( | ADPCMChannelStatus * | c, | |
unsigned char | nibble | |||
) | [inline, static] |
static int get_nb_samples | ( | AVCodecContext * | avctx, | |
const uint8_t * | buf, | |||
int | buf_size, | |||
int * | coded_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.
[out] | coded_samples | set 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. |
Definition at line 333 of file adpcm.c.
Referenced by adpcm_decode_frame().
static void xa_decode | ( | short * | out, | |
const unsigned char * | in, | |||
ADPCMChannelStatus * | left, | |||
ADPCMChannelStatus * | right, | |||
int | inc | |||
) | [static] |
const int 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().
const int 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_decode_frame().
const int 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 xa_decode().