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pcm.c File Reference

PCM codecs. More...

#include "libavutil/attributes.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
#include "mathops.h"
#include "pcm_tablegen.h"

Go to the source code of this file.

Data Structures

struct  PCMDecode
 

Macros

#define ENCODE(type, endian, src, dst, n, shift, offset)
 Write PCM samples macro. More...
 
#define ENCODE_PLANAR(type, endian, dst, n, shift, offset)
 
#define DECODE(size, endian, src, dst, n, shift, offset)
 Read PCM samples macro. More...
 
#define DECODE_PLANAR(size, endian, src, dst, n, shift, offset)
 
#define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
 
#define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_)
 
#define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)   PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
 
#define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name)   PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
 
#define PCM_ENCODER(id, sample_fmt, name, long_name)   PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)
 
#define PCM_DECODER_0(id, sample_fmt, name, long_name)
 
#define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_)
 
#define PCM_DECODER_2(cf, id, sample_fmt, name, long_name)   PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)
 
#define PCM_DECODER_3(cf, id, sample_fmt, name, long_name)   PCM_DECODER_2(cf, id, sample_fmt, name, long_name)
 
#define PCM_DECODER(id, sample_fmt, name, long_name)   PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)
 
#define PCM_CODEC(id, sample_fmt_, name, long_name_)
 

Functions

static av_cold int pcm_encode_init (AVCodecContext *avctx)
 
static int pcm_encode_frame (AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
 
static av_cold int pcm_decode_init (AVCodecContext *avctx)
 
static int pcm_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
 
 PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw,"PCM A-law / G.711 A-law")
 
 PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be,"PCM 32-bit floating point big-endian")
 
 PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le,"PCM 32-bit floating point little-endian")
 
 PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be,"PCM 64-bit floating point big-endian")
 
 PCM_CODEC (PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le,"PCM 64-bit floating point little-endian")
 
 PCM_DECODER (PCM_LXF, AV_SAMPLE_FMT_S32P, pcm_lxf,"PCM signed 20-bit little-endian planar")
 
 PCM_CODEC (PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw,"PCM mu-law / G.711 mu-law")
 
 PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8,"PCM signed 8-bit")
 
 PCM_CODEC (PCM_S8_PLANAR, AV_SAMPLE_FMT_U8P, pcm_s8_planar,"PCM signed 8-bit planar")
 
 PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be,"PCM signed 16-bit big-endian")
 
 PCM_CODEC (PCM_S16BE_PLANAR, AV_SAMPLE_FMT_S16P, pcm_s16be_planar,"PCM signed 16-bit big-endian planar")
 
 PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le,"PCM signed 16-bit little-endian")
 
 PCM_CODEC (PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P, pcm_s16le_planar,"PCM signed 16-bit little-endian planar")
 
 PCM_CODEC (PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be,"PCM signed 24-bit big-endian")
 
 PCM_CODEC (PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud,"PCM D-Cinema audio signed 24-bit")
 
 PCM_CODEC (PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le,"PCM signed 24-bit little-endian")
 
 PCM_CODEC (PCM_S24LE_PLANAR, AV_SAMPLE_FMT_S32P, pcm_s24le_planar,"PCM signed 24-bit little-endian planar")
 
 PCM_CODEC (PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be,"PCM signed 32-bit big-endian")
 
 PCM_CODEC (PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le,"PCM signed 32-bit little-endian")
 
 PCM_CODEC (PCM_S32LE_PLANAR, AV_SAMPLE_FMT_S32P, pcm_s32le_planar,"PCM signed 32-bit little-endian planar")
 
 PCM_CODEC (PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8,"PCM unsigned 8-bit")
 
 PCM_CODEC (PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be,"PCM unsigned 16-bit big-endian")
 
 PCM_CODEC (PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le,"PCM unsigned 16-bit little-endian")
 
 PCM_CODEC (PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be,"PCM unsigned 24-bit big-endian")
 
 PCM_CODEC (PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le,"PCM unsigned 24-bit little-endian")
 
 PCM_CODEC (PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be,"PCM unsigned 32-bit big-endian")
 
 PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le,"PCM unsigned 32-bit little-endian")
 
 PCM_DECODER (PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork,"PCM Zork")
 

Detailed Description

PCM codecs.

Definition in file pcm.c.

Macro Definition Documentation

#define ENCODE (   type,
  endian,
  src,
  dst,
  n,
  shift,
  offset 
)
Value:
samples_ ## type = (const type *) src; \
for (; n > 0; n--) { \
register type v = (*samples_ ## type++ >> shift) + offset; \
bytestream_put_ ## endian(&dst, v); \
}
shift
static int shift(int a, int b)
Definition: sonic.c:82
offset
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
n
int n
Definition: avisynth_c.h:547
src
#define src
Definition: vp9dsp.c:530
type
GLint GLenum type
Definition: opengl_enc.c:105
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469

Write PCM samples macro.

Parameters
typeDatatype of native machine format
endianbytestream_put_xxx() suffix
srcSource pointer (variable name)
dstDestination pointer (variable name)
nTotal number of samples (variable name)
shiftBitshift (bits)
offsetSample value offset

Definition at line 65 of file pcm.c.

Referenced by pcm_encode_frame().

#define ENCODE_PLANAR (   type,
  endian,
  dst,
  n,
  shift,
  offset 
)
Value:
n /= avctx->channels; \
for (c = 0; c < avctx->channels; c++) { \
int i; \
samples_ ## type = (const type *) frame->extended_data[c]; \
for (i = n; i > 0; i--) { \
register type v = (*samples_ ## type++ >> shift) + offset; \
bytestream_put_ ## endian(&dst, v); \
} \
}
shift
static int shift(int a, int b)
Definition: sonic.c:82
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
offset
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
n
int n
Definition: avisynth_c.h:547
type
GLint GLenum type
Definition: opengl_enc.c:105
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:231
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469

Definition at line 72 of file pcm.c.

Referenced by pcm_encode_frame().

#define DECODE (   size,
  endian,
  src,
  dst,
  n,
  shift,
  offset 
)
Value:
for (; n > 0; n--) { \
uint ## size ## _t v = bytestream_get_ ## endian(&src); \
AV_WN ## size ## A(dst, (v - offset) << shift); \
dst += size / 8; \
}
shift
static int shift(int a, int b)
Definition: sonic.c:82
AV_WN
#define AV_WN(s, p, v)
Definition: intreadwrite.h:225
size
ptrdiff_t size
Definition: opengl_enc.c:101
A
#define A(x)
Definition: vp56_arith.h:28
offset
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
n
int n
Definition: avisynth_c.h:547
src
#define src
Definition: vp9dsp.c:530

Read PCM samples macro.

Parameters
sizeData size of native machine format
endianbytestream_get_xxx() endian suffix
srcSource pointer (variable name)
dstDestination pointer (variable name)
nTotal number of samples (variable name)
shiftBitshift (bits)
offsetSample value offset

Definition at line 267 of file pcm.c.

Referenced by pcm_decode_frame().

#define DECODE_PLANAR (   size,
  endian,
  src,
  dst,
  n,
  shift,
  offset 
)
Value:
n /= avctx->channels; \
for (c = 0; c < avctx->channels; c++) { \
int i; \
dst = frame->extended_data[c]; \
for (i = n; i > 0; i--) { \
uint ## size ## _t v = bytestream_get_ ## endian(&src); \
AV_WN ## size ## A(dst, (v - offset) << shift); \
dst += size / 8; \
} \
}
shift
static int shift(int a, int b)
Definition: sonic.c:82
AV_WN
#define AV_WN(s, p, v)
Definition: intreadwrite.h:225
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
size
ptrdiff_t size
Definition: opengl_enc.c:101
A
#define A(x)
Definition: vp56_arith.h:28
offset
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
n
int n
Definition: avisynth_c.h:547
src
#define src
Definition: vp9dsp.c:530
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:231
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469

Definition at line 274 of file pcm.c.

Referenced by pcm_decode_frame().

#define PCM_ENCODER_0 (   id_,
  sample_fmt_,
  name_,
  long_name_ 
)

Definition at line 495 of file pcm.c.

#define PCM_ENCODER_1 (   id_,
  sample_fmt_,
  name_,
  long_name_ 
)
Value:
AVCodec ff_ ## name_ ## _encoder = { \
.name = #name_, \
.long_name = NULL_IF_CONFIG_SMALL(long_name_), \
.type = AVMEDIA_TYPE_AUDIO, \
.id = AV_CODEC_ID_ ## id_, \
.init = pcm_encode_init, \
.encode2 = pcm_encode_frame, \
.capabilities = AV_CODEC_CAP_VARIABLE_FRAME_SIZE, \
.sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
AV_SAMPLE_FMT_NONE }, \
}
pcm_encode_frame
static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: pcm.c:83
AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
AVCodec
AVCodec.
Definition: avcodec.h:3542
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:176
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:194
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3549
AV_CODEC_CAP_VARIABLE_FRAME_SIZE
#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE
Audio encoder supports receiving a different number of samples in each call.
Definition: avcodec.h:1035
pcm_encode_init
static av_cold int pcm_encode_init(AVCodecContext *avctx)
Definition: pcm.c:34
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58

Definition at line 496 of file pcm.c.

#define PCM_ENCODER_2 (   cf,
  id,
  sample_fmt,
  name,
  long_name 
)    PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)

Definition at line 509 of file pcm.c.

#define PCM_ENCODER_3 (   cf,
  id,
  sample_fmt,
  name,
  long_name 
)    PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)

Definition at line 511 of file pcm.c.

#define PCM_ENCODER (   id,
  sample_fmt,
  name,
  long_name 
)    PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)

Definition at line 513 of file pcm.c.

#define PCM_DECODER_0 (   id,
  sample_fmt,
  name,
  long_name 
)

Definition at line 516 of file pcm.c.

#define PCM_DECODER_1 (   id_,
  sample_fmt_,
  name_,
  long_name_ 
)
Value:
AVCodec ff_ ## name_ ## _decoder = { \
.name = #name_, \
.long_name = NULL_IF_CONFIG_SMALL(long_name_), \
.type = AVMEDIA_TYPE_AUDIO, \
.id = AV_CODEC_ID_ ## id_, \
.priv_data_size = sizeof(PCMDecode), \
.init = pcm_decode_init, \
.decode = pcm_decode_frame, \
.capabilities = AV_CODEC_CAP_DR1, \
.sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
AV_SAMPLE_FMT_NONE }, \
}
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
AVCodec
AVCodec.
Definition: avcodec.h:3542
PCMDecode
Definition: pcm.c:222
pcm_decode_frame
static int pcm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: pcm.c:286
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:176
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:194
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3549
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
pcm_decode_init
static av_cold int pcm_decode_init(AVCodecContext *avctx)
Definition: pcm.c:226
decode
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:722
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:956

Definition at line 517 of file pcm.c.

#define PCM_DECODER_2 (   cf,
  id,
  sample_fmt,
  name,
  long_name 
)    PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)

Definition at line 531 of file pcm.c.

#define PCM_DECODER_3 (   cf,
  id,
  sample_fmt,
  name,
  long_name 
)    PCM_DECODER_2(cf, id, sample_fmt, name, long_name)

Definition at line 533 of file pcm.c.

#define PCM_DECODER (   id,
  sample_fmt,
  name,
  long_name 
)    PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)

Definition at line 535 of file pcm.c.

#define PCM_CODEC (   id,
  sample_fmt_,
  name,
  long_name_ 
)
Value:
PCM_ENCODER(id, sample_fmt_, name, long_name_); \
PCM_DECODER(id, sample_fmt_, name, long_name_)
PCM_DECODER
#define PCM_DECODER(id, sample_fmt, name, long_name)
Definition: pcm.c:535
PCM_ENCODER
#define PCM_ENCODER(id, sample_fmt, name, long_name)
Definition: pcm.c:513
name
const char * name
Definition: opengl_enc.c:103

Definition at line 538 of file pcm.c.

Function Documentation

static av_cold int pcm_encode_init ( AVCodecContext *  avctx)
static

Definition at line 34 of file pcm.c.

static int pcm_encode_frame ( AVCodecContext *  avctx,
AVPacket *  avpkt,
const AVFrame *  frame,
int *  got_packet_ptr 
)
static

Definition at line 83 of file pcm.c.

static av_cold int pcm_decode_init ( AVCodecContext *  avctx)
static

Definition at line 226 of file pcm.c.

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

Definition at line 286 of file pcm.c.

PCM_CODEC ( PCM_ALAW  ,
AV_SAMPLE_FMT_S16  ,
pcm_alaw  ,
"PCM A-law / G.711 A-law"   
)
PCM_CODEC ( PCM_F32BE  ,
AV_SAMPLE_FMT_FLT  ,
pcm_f32be  ,
"PCM 32-bit floating point big-endian"   
)
PCM_CODEC ( PCM_F32LE  ,
AV_SAMPLE_FMT_FLT  ,
pcm_f32le  ,
"PCM 32-bit floating point little-endian"   
)
PCM_CODEC ( PCM_F64BE  ,
AV_SAMPLE_FMT_DBL  ,
pcm_f64be  ,
"PCM 64-bit floating point big-endian"   
)
PCM_CODEC ( PCM_F64LE  ,
AV_SAMPLE_FMT_DBL  ,
pcm_f64le  ,
"PCM 64-bit floating point little-endian"   
)
PCM_DECODER ( PCM_LXF  ,
AV_SAMPLE_FMT_S32P  ,
pcm_lxf  ,
"PCM signed 20-bit little-endian planar"   
)
PCM_CODEC ( PCM_MULAW  ,
AV_SAMPLE_FMT_S16  ,
pcm_mulaw  ,
"PCM mu-law / G.711 mu-law"   
)
PCM_CODEC ( PCM_S8  ,
AV_SAMPLE_FMT_U8  ,
pcm_s8  ,
"PCM signed 8-bit"   
)
PCM_CODEC ( PCM_S8_PLANAR  ,
AV_SAMPLE_FMT_U8P  ,
pcm_s8_planar  ,
"PCM signed 8-bit planar"   
)
PCM_CODEC ( PCM_S16BE  ,
AV_SAMPLE_FMT_S16  ,
pcm_s16be  ,
"PCM signed 16-bit big-endian"   
)
PCM_CODEC ( PCM_S16BE_PLANAR  ,
AV_SAMPLE_FMT_S16P  ,
pcm_s16be_planar  ,
"PCM signed 16-bit big-endian planar"   
)
PCM_CODEC ( PCM_S16LE  ,
AV_SAMPLE_FMT_S16  ,
pcm_s16le  ,
"PCM signed 16-bit little-endian"   
)
PCM_CODEC ( PCM_S16LE_PLANAR  ,
AV_SAMPLE_FMT_S16P  ,
pcm_s16le_planar  ,
"PCM signed 16-bit little-endian planar"   
)
PCM_CODEC ( PCM_S24BE  ,
AV_SAMPLE_FMT_S32  ,
pcm_s24be  ,
"PCM signed 24-bit big-endian"   
)
PCM_CODEC ( PCM_S24DAUD  ,
AV_SAMPLE_FMT_S16  ,
pcm_s24daud  ,
"PCM D-Cinema audio signed 24-bit"   
)
PCM_CODEC ( PCM_S24LE  ,
AV_SAMPLE_FMT_S32  ,
pcm_s24le  ,
"PCM signed 24-bit little-endian"   
)
PCM_CODEC ( PCM_S24LE_PLANAR  ,
AV_SAMPLE_FMT_S32P  ,
pcm_s24le_planar  ,
"PCM signed 24-bit little-endian planar"   
)
PCM_CODEC ( PCM_S32BE  ,
AV_SAMPLE_FMT_S32  ,
pcm_s32be  ,
"PCM signed 32-bit big-endian"   
)
PCM_CODEC ( PCM_S32LE  ,
AV_SAMPLE_FMT_S32  ,
pcm_s32le  ,
"PCM signed 32-bit little-endian"   
)
PCM_CODEC ( PCM_S32LE_PLANAR  ,
AV_SAMPLE_FMT_S32P  ,
pcm_s32le_planar  ,
"PCM signed 32-bit little-endian planar"   
)
PCM_CODEC ( PCM_U8  ,
AV_SAMPLE_FMT_U8  ,
pcm_u8  ,
"PCM unsigned 8-bit"   
)
PCM_CODEC ( PCM_U16BE  ,
AV_SAMPLE_FMT_S16  ,
pcm_u16be  ,
"PCM unsigned 16-bit big-endian"   
)
PCM_CODEC ( PCM_U16LE  ,
AV_SAMPLE_FMT_S16  ,
pcm_u16le  ,
"PCM unsigned 16-bit little-endian"   
)
PCM_CODEC ( PCM_U24BE  ,
AV_SAMPLE_FMT_S32  ,
pcm_u24be  ,
"PCM unsigned 24-bit big-endian"   
)
PCM_CODEC ( PCM_U24LE  ,
AV_SAMPLE_FMT_S32  ,
pcm_u24le  ,
"PCM unsigned 24-bit little-endian"   
)
PCM_CODEC ( PCM_U32BE  ,
AV_SAMPLE_FMT_S32  ,
pcm_u32be  ,
"PCM unsigned 32-bit big-endian"   
)
PCM_CODEC ( PCM_U32LE  ,
AV_SAMPLE_FMT_S32  ,
pcm_u32le  ,
"PCM unsigned 32-bit little-endian"   
)
PCM_DECODER ( PCM_ZORK  ,
AV_SAMPLE_FMT_U8  ,
pcm_zork  ,
"PCM Zork"   
)
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