FFmpeg
Data Structures | Macros | Functions
audiotoolboxdec.c File Reference
#include <AudioToolbox/AudioToolbox.h>
#include "config.h"
#include "config_components.h"
#include "avcodec.h"
#include "ac3_parser_internal.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "mpegaudiodecheader.h"
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/log.h"

Go to the source code of this file.

Data Structures

struct  ATDecodeContext
 

Macros

#define kAudioFormatEnhancedAC3   'ec-3'
 
#define COPY_SAMPLES(type)
 
#define FFAT_DEC_CLASS(NAME)
 
#define FFAT_DEC(NAME, ID, bsf_name)
 

Functions

static UInt32 ffat_get_format_id (enum AVCodecID codec, int profile)
 
static int ffat_get_channel_id (AudioChannelLabel label)
 
static int ffat_compare_channel_descriptions (const void *a, const void *b)
 
static AudioChannelLayout * ffat_convert_layout (AudioChannelLayout *layout, UInt32 *size)
 
static int ffat_update_ctx (AVCodecContext *avctx)
 
static void put_descr (PutByteContext *pb, int tag, unsigned int size)
 
static uint8_t * ffat_get_magic_cookie (AVCodecContext *avctx, UInt32 *cookie_size)
 
static av_cold int ffat_usable_extradata (AVCodecContext *avctx)
 
static int ffat_set_extradata (AVCodecContext *avctx)
 
static av_cold int ffat_create_decoder (AVCodecContext *avctx, const AVPacket *pkt)
 
static av_cold int ffat_init_decoder (AVCodecContext *avctx)
 
static OSStatus ffat_decode_callback (AudioConverterRef converter, UInt32 *nb_packets, AudioBufferList *data, AudioStreamPacketDescription **packets, void *inctx)
 
static void ffat_copy_samples (AVCodecContext *avctx, AVFrame *frame)
 
static int ffat_decode (AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
 
static av_cold void ffat_decode_flush (AVCodecContext *avctx)
 
static av_cold int ffat_close_decoder (AVCodecContext *avctx)
 

Macro Definition Documentation

◆ kAudioFormatEnhancedAC3

#define kAudioFormatEnhancedAC3   'ec-3'

Definition at line 39 of file audiotoolboxdec.c.

◆ COPY_SAMPLES

#define COPY_SAMPLES (   type)
Value:
type *in_ptr = (type*)at->decoded_data; \
type *end_ptr = in_ptr + frame->nb_samples * avctx->ch_layout.nb_channels; \
type *out_ptr = (type*)frame->data[0]; \
for (; in_ptr < end_ptr; in_ptr += avctx->ch_layout.nb_channels, out_ptr += avctx->ch_layout.nb_channels) { \
int c; \
for (c = 0; c < avctx->ch_layout.nb_channels; c++) \
out_ptr[c] = in_ptr[at->channel_map[c]]; \
}

Definition at line 468 of file audiotoolboxdec.c.

◆ FFAT_DEC_CLASS

#define FFAT_DEC_CLASS (   NAME)
Value:
static const AVClass ffat_##NAME##_dec_class = { \
.class_name = "at_" #NAME "_dec", \
.version = LIBAVUTIL_VERSION_INT, \
};

Definition at line 586 of file audiotoolboxdec.c.

◆ FFAT_DEC

#define FFAT_DEC (   NAME,
  ID,
  bsf_name 
)
Value:
FFAT_DEC_CLASS(NAME) \
const FFCodec ff_##NAME##_at_decoder = { \
.p.name = #NAME "_at", \
CODEC_LONG_NAME(#NAME " (AudioToolbox)"), \
.p.type = AVMEDIA_TYPE_AUDIO, \
.p.id = ID, \
.priv_data_size = sizeof(ATDecodeContext), \
.init = ffat_init_decoder, \
.close = ffat_close_decoder, \
FF_CODEC_DECODE_CB(ffat_decode), \
.flush = ffat_decode_flush, \
.p.priv_class = &ffat_##NAME##_dec_class, \
.bsfs = bsf_name, \
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_CHANNEL_CONF, \
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, \
.p.wrapper_name = "at", \
};

Definition at line 592 of file audiotoolboxdec.c.

Function Documentation

◆ ffat_get_format_id()

static UInt32 ffat_get_format_id ( enum AVCodecID  codec,
int  profile 
)
static

Definition at line 59 of file audiotoolboxdec.c.

Referenced by ffat_create_decoder().

◆ ffat_get_channel_id()

static int ffat_get_channel_id ( AudioChannelLabel  label)
static

Definition at line 100 of file audiotoolboxdec.c.

Referenced by ffat_compare_channel_descriptions(), and ffat_update_ctx().

◆ ffat_compare_channel_descriptions()

static int ffat_compare_channel_descriptions ( const void *  a,
const void *  b 
)
static

Definition at line 128 of file audiotoolboxdec.c.

Referenced by ffat_update_ctx().

◆ ffat_convert_layout()

static AudioChannelLayout* ffat_convert_layout ( AudioChannelLayout *  layout,
UInt32 *  size 
)
static

Definition at line 135 of file audiotoolboxdec.c.

Referenced by ffat_update_ctx().

◆ ffat_update_ctx()

static int ffat_update_ctx ( AVCodecContext *  avctx)
static

Definition at line 163 of file audiotoolboxdec.c.

Referenced by ffat_create_decoder().

◆ put_descr()

static void put_descr ( PutByteContext *  pb,
int  tag,
unsigned int  size 
)
static

Definition at line 224 of file audiotoolboxdec.c.

Referenced by ffat_get_magic_cookie().

◆ ffat_get_magic_cookie()

static uint8_t* ffat_get_magic_cookie ( AVCodecContext *  avctx,
UInt32 *  cookie_size 
)
static

Definition at line 233 of file audiotoolboxdec.c.

Referenced by ffat_create_decoder(), and ffat_set_extradata().

◆ ffat_usable_extradata()

static av_cold int ffat_usable_extradata ( AVCodecContext *  avctx)
static

Definition at line 273 of file audiotoolboxdec.c.

Referenced by ffat_create_decoder(), ffat_init_decoder(), and ffat_set_extradata().

◆ ffat_set_extradata()

static int ffat_set_extradata ( AVCodecContext *  avctx)
static

Definition at line 283 of file audiotoolboxdec.c.

Referenced by ffat_create_decoder().

◆ ffat_create_decoder()

static av_cold int ffat_create_decoder ( AVCodecContext *  avctx,
const AVPacket *  pkt 
)
static

Definition at line 305 of file audiotoolboxdec.c.

Referenced by ffat_decode(), and ffat_init_decoder().

◆ ffat_init_decoder()

static av_cold int ffat_init_decoder ( AVCodecContext *  avctx)
static

Definition at line 412 of file audiotoolboxdec.c.

◆ ffat_decode_callback()

static OSStatus ffat_decode_callback ( AudioConverterRef  converter,
UInt32 *  nb_packets,
AudioBufferList *  data,
AudioStreamPacketDescription **  packets,
void *  inctx 
)
static

Definition at line 429 of file audiotoolboxdec.c.

Referenced by ffat_decode().

◆ ffat_copy_samples()

static void ffat_copy_samples ( AVCodecContext *  avctx,
AVFrame *  frame 
)
static

Definition at line 478 of file audiotoolboxdec.c.

Referenced by ffat_decode().

◆ ffat_decode()

static int ffat_decode ( AVCodecContext *  avctx,
AVFrame *  frame,
int *  got_frame_ptr,
AVPacket *  avpkt 
)
static

Definition at line 488 of file audiotoolboxdec.c.

◆ ffat_decode_flush()

static av_cold void ffat_decode_flush ( AVCodecContext *  avctx)
static

Definition at line 566 of file audiotoolboxdec.c.

◆ ffat_close_decoder()

static av_cold int ffat_close_decoder ( AVCodecContext *  avctx)
static

Definition at line 574 of file audiotoolboxdec.c.

FF_CODEC_CAP_INIT_CLEANUP
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: codec_internal.h:42
FFAT_DEC_CLASS
#define FFAT_DEC_CLASS(NAME)
Definition: audiotoolboxdec.c:586
ffat_close_decoder
static av_cold int ffat_close_decoder(AVCodecContext *avctx)
Definition: audiotoolboxdec.c:574
ffat_init_decoder
static av_cold int ffat_init_decoder(AVCodecContext *avctx)
Definition: audiotoolboxdec.c:412
FFCodec
Definition: codec_internal.h:127
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:365
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:287
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
frame
static AVFrame * frame
Definition: demux_decode.c:54
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
ffat_decode
static int ffat_decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
Definition: audiotoolboxdec.c:488
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AV_CODEC_CAP_CHANNEL_CONF
#define AV_CODEC_CAP_CHANNEL_CONF
Codec should fill in channel configuration and samplerate instead of container.
Definition: codec.h:106
ID
#define ID(_0)
Definition: mov_chan.c:84
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:365
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:424
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:194
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:71
ffat_decode_flush
static av_cold void ffat_decode_flush(AVCodecContext *avctx)
Definition: audiotoolboxdec.c:566
ATDecodeContext
Definition: audiotoolboxdec.c:42
AV_CODEC_CAP_DELAY
#define AV_CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
Definition: codec.h:76
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