libavcodec/binkaudio.c File Reference

Bink Audio decoder. More...

#include "avcodec.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
Defines
#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.

---

Define Documentation

#define BINK_BLOCK_MAX_SIZE   (MAX_CHANNELS << 11)

Definition at line 45 of file binkaudio.c.

#define BITSTREAM_READER_LE

Definition at line 32 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 170 of file binkaudio.c.

Referenced by decode_block().

#define MAX_CHANNELS   2

Definition at line 44 of file binkaudio.c.

---

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 181 of file binkaudio.c.

static av_cold int decode_end

(

AVCodecContext *

avctx

)

[static]

Definition at line 291 of file binkaudio.c.

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

Definition at line 310 of file binkaudio.c.

static av_cold int decode_init

(

AVCodecContext *

avctx

)

[static]

Definition at line 74 of file binkaudio.c.

static void get_bits_align32

(

GetBitContext *

s

)

[static]

Definition at line 304 of file binkaudio.c.

Referenced by decode_frame().

static float get_float

(

GetBitContext *

gb

)

[static]

Definition at line 157 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 373 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 361 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 42 of file binkaudio.c.

Referenced by decode_block(), decode_init(), and x8_decode_intra_mb().

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 166 of file binkaudio.c.

Referenced by decode_block().