binkaudio.c File Reference

#include "config_components.h"
#include "libavutil/channel_layout.h"
#include "libavutil/intfloat.h"
#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "dct.h"
#include "decode.h"
#include "get_bits.h"
#include "codec_internal.h"
#include "internal.h"
#include "rdft.h"
#include "wma_freqs.h"

Go to the source code of this file.

Data Structures
struct	BinkAudioContext

Macros
#define	BITSTREAM_READER_LE
#define	MAX_DCT_CHANNELS   6
#define	MAX_CHANNELS   2
#define	BINK_BLOCK_MAX_SIZE   (MAX_CHANNELS << 11)

Functions
static av_cold int	decode_init (AVCodecContext *avctx)
static float	get_float (GetBitContext *gb)
static int	decode_block (BinkAudioContext *s, float **out, int use_dct, int channels, int ch_offset)
	Decode Bink Audio block. More...
static av_cold int	decode_end (AVCodecContext *avctx)
static void	get_bits_align32 (GetBitContext *s)
static int	binkaudio_receive_frame (AVCodecContext *avctx, AVFrame *frame)
static void	decode_flush (AVCodecContext *avctx)

Variables
static const uint8_t	rle_length_tab [16]
const FFCodec	ff_binkaudio_rdft_decoder
const FFCodec	ff_binkaudio_dct_decoder

Detailed Description

Bink Audio decoder

Technical details here: http://wiki.multimedia.cx/index.php?title=Bink_Audio

Definition in file binkaudio.c.

Macro Definition Documentation

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 37 of file binkaudio.c.

MAX_DCT_CHANNELS

#define MAX_DCT_CHANNELS   6

Definition at line 47 of file binkaudio.c.

MAX_CHANNELS

#define MAX_CHANNELS   2

Definition at line 48 of file binkaudio.c.

BINK_BLOCK_MAX_SIZE

#define BINK_BLOCK_MAX_SIZE   (MAX_CHANNELS << 11)

Definition at line 49 of file binkaudio.c.

Function Documentation

decode_init()

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 73 of file binkaudio.c.

get_float()

static float get_float ( GetBitContext *  gb )

static

Definition at line 155 of file binkaudio.c.

Referenced by decode_block().

decode_block()

static int decode_block ( BinkAudioContext *  s, float **  out, int  use_dct, int  channels, int  ch_offset  )

static

Decode Bink Audio block.

Parameters

[out]

out

Output buffer (must contain s->block_size elements)

Returns

0 on success, negative error code on failure

Definition at line 173 of file binkaudio.c.

Referenced by binkaudio_receive_frame().

decode_end()

static av_cold int decode_end ( AVCodecContext *  avctx )

static

Definition at line 278 of file binkaudio.c.

get_bits_align32()

static void get_bits_align32 ( GetBitContext *  s )

static

Definition at line 289 of file binkaudio.c.

Referenced by binkaudio_receive_frame().

binkaudio_receive_frame()

static int binkaudio_receive_frame ( AVCodecContext *  avctx, AVFrame *  frame  )

static

Definition at line 295 of file binkaudio.c.

decode_flush()

static void decode_flush ( AVCodecContext *  avctx )

static

Definition at line 358 of file binkaudio.c.

Variable Documentation

rle_length_tab

const uint8_t rle_length_tab[16]

static

Initial value:

= {
    2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 32, 64
}

Definition at line 164 of file binkaudio.c.

Referenced by decode_block().

ff_binkaudio_rdft_decoder

const FFCodec ff_binkaudio_rdft_decoder

Initial value:

= {
    .p.name         = "binkaudio_rdft",
    .p.long_name    = NULL_IF_CONFIG_SMALL("Bink Audio (RDFT)"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_BINKAUDIO_RDFT,
    .priv_data_size = sizeof(BinkAudioContext),
    .init           = decode_init,
    .flush          = decode_flush,
    .close          = decode_end,
    FF_CODEC_RECEIVE_FRAME_CB(binkaudio_receive_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 368 of file binkaudio.c.

ff_binkaudio_dct_decoder

const FFCodec ff_binkaudio_dct_decoder

Initial value:

= {
    .p.name         = "binkaudio_dct",
    .p.long_name    = NULL_IF_CONFIG_SMALL("Bink Audio (DCT)"),
    .p.type         = AVMEDIA_TYPE_AUDIO,
    .p.id           = AV_CODEC_ID_BINKAUDIO_DCT,
    .priv_data_size = sizeof(BinkAudioContext),
    .init           = decode_init,
    .flush          = decode_flush,
    .close          = decode_end,
    FF_CODEC_RECEIVE_FRAME_CB(binkaudio_receive_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 382 of file binkaudio.c.