binkaudio.c File Reference

Bink Audio decoder. More...

#include "avcodec.h"
#include "internal.h"
#include "get_bits.h"
#include "dsputil.h"
#include "dct.h"
#include "rdft.h"
#include "fmtconvert.h"
#include "libavutil/intfloat.h"

Go to the source code of this file.

Data Structures
struct	BinkAudioContext

Macros
#define	BITSTREAM_READER_LE
#define	MAX_CHANNELS   2
#define	BINK_BLOCK_MAX_SIZE   (MAX_CHANNELS << 11)
#define	GET_BITS_SAFE(out, nbits)

Functions
static av_cold int	decode_init (AVCodecContext *avctx)
static float	get_float (GetBitContext *gb)
static int	decode_block (BinkAudioContext *s, int16_t *out, int use_dct)
	Decode Bink Audio block.
static av_cold int	decode_end (AVCodecContext *avctx)
static void	get_bits_align32 (GetBitContext *s)
static int	decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)

Variables
const uint16_t	ff_wma_critical_freqs [25]
static float	quant_table [96]
static const uint8_t	rle_length_tab [16]
AVCodec	ff_binkaudio_rdft_decoder
AVCodec	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

#define BINK_BLOCK_MAX_SIZE   (MAX_CHANNELS << 11)

Definition at line 46 of file binkaudio.c.

#define BITSTREAM_READER_LE

Definition at line 33 of file binkaudio.c.

#define GET_BITS_SAFE	(		out,
			nbits
	)

Value:

do {  \
    if (get_bits_left(gb) < nbits)      \
        return AVERROR_INVALIDDATA;     \
    out = get_bits(gb, nbits);          \
} while (0)

Definition at line 171 of file binkaudio.c.

Referenced by decode_block().

#define MAX_CHANNELS   2

Definition at line 45 of file binkaudio.c.

Referenced by decode_init().

Function Documentation

static int decode_block ( BinkAudioContext *  s, int16_t *  out, int  use_dct  )

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 182 of file binkaudio.c.

Referenced by decode_frame().

static av_cold int decode_end ( AVCodecContext *  avctx )

static

Definition at line 292 of file binkaudio.c.

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

static

Definition at line 311 of file binkaudio.c.

static av_cold int decode_init ( AVCodecContext *  avctx )

static

Definition at line 75 of file binkaudio.c.

static void get_bits_align32 ( GetBitContext *  s )

static

Definition at line 305 of file binkaudio.c.

Referenced by decode_frame().

static float get_float ( GetBitContext *  gb )

static

Definition at line 158 of file binkaudio.c.

Referenced by decode_block().

Variable Documentation

AVCodec ff_binkaudio_dct_decoder

Initial value:

 {
    .name           = "binkaudio_dct",
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = CODEC_ID_BINKAUDIO_DCT,
    .priv_data_size = sizeof(BinkAudioContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DELAY | CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("Bink Audio (DCT)")
}

Definition at line 374 of file binkaudio.c.

AVCodec ff_binkaudio_rdft_decoder

Initial value:

 {
    .name           = "binkaudio_rdft",
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = CODEC_ID_BINKAUDIO_RDFT,
    .priv_data_size = sizeof(BinkAudioContext),
    .init           = decode_init,
    .close          = decode_end,
    .decode         = decode_frame,
    .capabilities   = CODEC_CAP_DELAY | CODEC_CAP_DR1,
    .long_name = NULL_IF_CONFIG_SMALL("Bink Audio (RDFT)")
}

Definition at line 362 of file binkaudio.c.

const uint16_t ff_wma_critical_freqs[25]

Definition at line 33 of file wmadata.h.

Referenced by decode_init(), and ff_wma_init().

float quant_table[96]

static

Definition at line 43 of file binkaudio.c.

Referenced by decode_block(), and decode_init().

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 167 of file binkaudio.c.

Referenced by decode_block().