libavcodec/vorbis_dec.c File Reference

Vorbis I decoder. More...

#include <math.h>
#include "avcodec.h"
#include "bitstream.h"
#include "dsputil.h"
#include "vorbis.h"
#include "xiph.h"
#include <assert.h>

Go to the source code of this file.

Data Structures
struct	vorbis_codebook
struct	vorbis_floor
union	vorbis_floor::vorbis_floor::vorbis_floor_u
struct	vorbis_floor::vorbis_floor::vorbis_floor_u::vorbis_floor::vorbis_floor_u::vorbis_floor0_s
struct	vorbis_floor::vorbis_floor::vorbis_floor_u::vorbis_floor::vorbis_floor_u::vorbis_floor1_s
struct	vorbis_residue
struct	vorbis_mapping
struct	vorbis_mode
struct	vorbis_context_s
Defines
#define	ALT_BITSTREAM_READER_LE
#define	V_NB_BITS   8
#define	V_NB_BITS2   11
#define	V_MAX_VLCS   (1<<16)
#define	V_MAX_PARTITIONS   (1<<20)
#define	AV_DEBUG(...)
#define	BARK(x)   (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
Typedefs
typedef union vorbis_floor_u	vorbis_floor_data
typedef struct vorbis_floor0_s	vorbis_floor0
typedef struct vorbis_floor1_s	vorbis_floor1
typedef int(*	vorbis_floor_decode_func )(struct vorbis_context_s *, vorbis_floor_data *, float *)
typedef struct vorbis_context_s	vorbis_context
Functions
static float	vorbisfloat2float (uint_fast32_t val)
static void	vorbis_free (vorbis_context *vc)
static int	vorbis_parse_setup_hdr_codebooks (vorbis_context *vc)
static int	vorbis_parse_setup_hdr_tdtransforms (vorbis_context *vc)
static int	vorbis_floor0_decode (vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
static void	create_map (vorbis_context *vc, uint_fast8_t floor_number)
static int	vorbis_floor1_decode (vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
static int	vorbis_parse_setup_hdr_floors (vorbis_context *vc)
static int	vorbis_parse_setup_hdr_residues (vorbis_context *vc)
static int	vorbis_parse_setup_hdr_mappings (vorbis_context *vc)
static int	vorbis_parse_setup_hdr_modes (vorbis_context *vc)
static int	vorbis_parse_setup_hdr (vorbis_context *vc)
static int	vorbis_parse_id_hdr (vorbis_context *vc)
static av_cold int	vorbis_decode_init (AVCodecContext *avccontext)
static av_always_inline int	vorbis_residue_decode_internal (vorbis_context *vc, vorbis_residue *vr, uint_fast8_t ch, uint_fast8_t *do_not_decode, float *vec, uint_fast16_t vlen, unsigned ch_left, int vr_type)
static int	vorbis_residue_decode (vorbis_context *vc, vorbis_residue *vr, uint_fast8_t ch, uint_fast8_t *do_not_decode, float *vec, uint_fast16_t vlen, unsigned ch_left)
void	vorbis_inverse_coupling (float *mag, float *ang, int blocksize)
static void	copy_normalize (float *dst, float *src, int len, int exp_bias, float add_bias)
static int	vorbis_parse_audio_packet (vorbis_context *vc)
static int	vorbis_decode_frame (AVCodecContext *avccontext, void *data, int *data_size, const uint8_t *buf, int buf_size)
static av_cold int	vorbis_decode_close (AVCodecContext *avccontext)
Variables
AVCodec	vorbis_decoder

---

Detailed Description

Vorbis I decoder.

Author:

Denes Balatoni ( dbalatoni programozo hu )

This file is part of FFmpeg.

FFmpeg is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

FFmpeg is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with FFmpeg; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Definition in file vorbis_dec.c.

---

Define Documentation

#define ALT_BITSTREAM_READER_LE

Definition at line 29 of file vorbis_dec.c.

#define AV_DEBUG

(

...

)

Definition at line 43 of file vorbis_dec.c.

Referenced by create_map(), vorbis_decode_frame(), vorbis_floor0_decode(), vorbis_floor1_decode(), vorbis_parse_audio_packet(), vorbis_parse_id_hdr(), vorbis_parse_setup_hdr_codebooks(), vorbis_parse_setup_hdr_floors(), vorbis_parse_setup_hdr_mappings(), vorbis_parse_setup_hdr_modes(), vorbis_parse_setup_hdr_residues(), vorbis_parse_setup_hdr_tdtransforms(), and vorbis_residue_decode_internal().

#define BARK

(

x

)

(13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))

Definition at line 163 of file vorbis_dec.c.

Referenced by create_map().

#define V_MAX_PARTITIONS   (1<<20)

Definition at line 40 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_residues().

#define V_MAX_VLCS   (1<<16)

Definition at line 39 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS   8

Definition at line 37 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS2   11

Definition at line 38 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

---

Typedef Documentation

typedef struct vorbis_context_s vorbis_context

typedef struct vorbis_floor0_s vorbis_floor0

Definition at line 59 of file vorbis_dec.c.

typedef struct vorbis_floor1_s vorbis_floor1

Definition at line 60 of file vorbis_dec.c.

typedef union vorbis_floor_u vorbis_floor_data

Definition at line 58 of file vorbis_dec.c.

typedef int(* vorbis_floor_decode_func)(struct vorbis_context_s *, vorbis_floor_data *, float *)

Definition at line 64 of file vorbis_dec.c.

---

Function Documentation

static void copy_normalize	(	float *	dst,
		float *	src,
		int	len,
		int	exp_bias,
		float	add_bias
	)			[static]

Definition at line 1485 of file vorbis_dec.c.

Referenced by vorbis_parse_audio_packet().

static void create_map	(	vorbis_context *	vc,
		uint_fast8_t	floor_number
	)			[static]

Definition at line 791 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_floors().

static av_cold int vorbis_decode_close

(

AVCodecContext *

avccontext

)

[static]

Definition at line 1705 of file vorbis_dec.c.

static int vorbis_decode_frame	(	AVCodecContext *	avccontext,
		void *	data,
		int *	data_size,
		const uint8_t *	buf,
		int	buf_size
	)			[static]

Definition at line 1661 of file vorbis_dec.c.

static av_cold int vorbis_decode_init

(

AVCodecContext *

avccontext

)

[static]

Definition at line 982 of file vorbis_dec.c.

static int vorbis_floor0_decode	(	vorbis_context *	vc,
		vorbis_floor_data *	vfu,
		float *	vec
	)			[static]

Definition at line 1049 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_floors().

static int vorbis_floor1_decode	(	vorbis_context *	vc,
		vorbis_floor_data *	vfu,
		float *	vec
	)			[static]

Definition at line 1165 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_floors().

static void vorbis_free

(

vorbis_context *

vc

)

[static]

Definition at line 176 of file vorbis_dec.c.

Referenced by vorbis_decode_close(), and vorbis_decode_init().

void vorbis_inverse_coupling	(	float *	mag,
		float *	ang,
		int	blocksize
	)

Definition at line 1460 of file vorbis_dec.c.

Referenced by dsputil_init().

static int vorbis_parse_audio_packet

(

vorbis_context *

vc

)

[static]

Definition at line 1499 of file vorbis_dec.c.

Referenced by vorbis_decode_frame().

static int vorbis_parse_id_hdr

(

vorbis_context *

vc

)

[static]

Definition at line 901 of file vorbis_dec.c.

Referenced by vorbis_decode_init().

static int vorbis_parse_setup_hdr

(

vorbis_context *

vc

)

[static]

Definition at line 857 of file vorbis_dec.c.

Referenced by vorbis_decode_init().

static int vorbis_parse_setup_hdr_codebooks

(

vorbis_context *

vc

)

[static]

Definition at line 225 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_floors

(

vorbis_context *

vc

)

[static]

Definition at line 451 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_mappings

(

vorbis_context *

vc

)

[static]

Definition at line 711 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_modes

(

vorbis_context *

vc

)

[static]

Definition at line 829 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_residues

(

vorbis_context *

vc

)

[static]

Definition at line 633 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_tdtransforms

(

vorbis_context *

vc

)

[static]

Definition at line 426 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_residue_decode	(	vorbis_context *	vc,
		vorbis_residue *	vr,
		uint_fast8_t	ch,
		uint_fast8_t *	do_not_decode,
		float *	vec,
		uint_fast16_t	vlen,
		unsigned	ch_left
	)			[inline, static]

Definition at line 1446 of file vorbis_dec.c.

Referenced by vorbis_parse_audio_packet().

static av_always_inline int vorbis_residue_decode_internal	(	vorbis_context *	vc,
		vorbis_residue *	vr,
		uint_fast8_t	ch,
		uint_fast8_t *	do_not_decode,
		float *	vec,
		uint_fast16_t	vlen,
		unsigned	ch_left,
		int	vr_type
	)			[static]

Definition at line 1296 of file vorbis_dec.c.

Referenced by vorbis_residue_decode().

static float vorbisfloat2float

(

uint_fast32_t

val

)

[static]

Definition at line 166 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

---

Variable Documentation

AVCodec vorbis_decoder

Initial value:

 {
    "vorbis",
    CODEC_TYPE_AUDIO,
    CODEC_ID_VORBIS,
    sizeof(vorbis_context),
    vorbis_decode_init,
    NULL,
    vorbis_decode_close,
    vorbis_decode_frame,
    .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
}

Definition at line 1713 of file vorbis_dec.c.