Libav
Data Structures | Macros | Functions
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 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 av_cold int pcm_encode_close (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")
 
 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")
 
 PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8,"PCM signed 8-bit")
 
 PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be,"PCM signed 16-bit big-endian")
 
 PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le,"PCM signed 16-bit little-endian")
 
 PCM_DECODER (PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P, pcm_s16le_planar,"PCM 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_DECODER (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_DECODER (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); \
}
for(j=16;j >0;--j)

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 75 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; \
}
int size
#define AV_WN(s, p, v)
Definition: intreadwrite.h:316
Definition: vf_drawbox.c:37

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 246 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++) { \
samples = frame->extended_data[c]; \
memcpy(samples, src, n * size / 8); \
src += n * size / 8; \
} \
}
int size
for(j=16;j >0;--j)

Definition at line 265 of file pcm.c.

Referenced by pcm_decode_frame().

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

Definition at line 451 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, \
.close = pcm_encode_close, \
.capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE, \
.sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
}
#define CODEC_CAP_VARIABLE_FRAME_SIZE
Audio encoder supports receiving a different number of samples in each call.
Definition: avcodec.h:771
static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: pcm.c:82
AVCodec.
Definition: avcodec.h:2812
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
const char * name
Name of the codec implementation.
Definition: avcodec.h:2819
static av_cold int pcm_encode_close(AVCodecContext *avctx)
Definition: pcm.c:58
static av_cold int pcm_encode_init(AVCodecContext *avctx)
Definition: pcm.c:34
AVSampleFormat
Audio Sample Formats.
Definition: samplefmt.h:61
AV_SAMPLE_FMT_NONE
Definition: avconv_filter.c:68

Definition at line 452 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 466 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 468 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 470 of file pcm.c.

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

Definition at line 473 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), \
.capabilities = CODEC_CAP_DR1, \
.sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
}
AVCodec.
Definition: avcodec.h:2812
Definition: pcm.c:201
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:275
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:684
static int pcm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: pcm.c:276
sample_fmts
Definition: avconv_filter.c:68
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
const char * name
Name of the codec implementation.
Definition: avcodec.h:2819
AVSampleFormat
Audio Sample Formats.
Definition: samplefmt.h:61
AV_SAMPLE_FMT_NONE
Definition: avconv_filter.c:68
static av_cold int pcm_decode_init(AVCodecContext *avctx)
Definition: pcm.c:205
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499

Definition at line 474 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 488 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 490 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 492 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_)
const char * name
#define PCM_DECODER(id, sample_fmt, name, long_name)
Definition: pcm.c:492
#define PCM_ENCODER(id, sample_fmt, name, long_name)
Definition: pcm.c:470

Definition at line 495 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 av_cold int pcm_encode_close ( AVCodecContext avctx)
static

Definition at line 58 of file pcm.c.

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

Definition at line 82 of file pcm.c.

static av_cold int pcm_decode_init ( AVCodecContext avctx)
static

Definition at line 205 of file pcm.c.

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

Definition at line 276 of file pcm.c.

PCM_CODEC ( PCM_ALAW  ,
AV_SAMPLE_FMT_S16  ,
pcm_alaw  ,
"PCM 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"   
)
PCM_CODEC ( PCM_S8  ,
AV_SAMPLE_FMT_U8  ,
pcm_s8  ,
"PCM signed 8-bit"   
)
PCM_CODEC ( PCM_S16BE  ,
AV_SAMPLE_FMT_S16  ,
pcm_s16be  ,
"PCM signed 16-bit big-endian"   
)
PCM_CODEC ( PCM_S16LE  ,
AV_SAMPLE_FMT_S16  ,
pcm_s16le  ,
"PCM signed 16-bit little-endian"   
)
PCM_DECODER ( PCM_S16LE_PLANAR  ,
AV_SAMPLE_FMT_S16P  ,
pcm_s16le_planar  ,
"PCM 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_DECODER ( 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_DECODER ( 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"   
)