libavcodec/vorbis_dec.c File Reference

Vorbis I decoder. More...

#include <math.h>
#include "avcodec.h"
#include "get_bits.h"
#include "dsputil.h"
#include "fft.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))

#define VALIDATE_INDEX(idx, limit)

#define GET_VALIDATED_INDEX(idx, bits, limit)

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, AVPacket *avpkt)

static av_cold int vorbis_decode_close (AVCodecContext *avccontext)

Variables

static const char idx_err_str [] = "Index value %d out of range (0 - %d) for %s at %s:%i\n"

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 44 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 161 of file vorbis_dec.c.

Referenced by create_map().

#define GET_VALIDATED_INDEX	(	idx,
		bits,
		limit	)

Value:

{\
        idx = get_bits(gb, bits);\
        VALIDATE_INDEX(idx, limit)\
    }

Definition at line 172 of file vorbis_dec.c.

Referenced by vorbis_parse_audio_packet(), vorbis_parse_setup_hdr_floors(), vorbis_parse_setup_hdr_mappings(), vorbis_parse_setup_hdr_modes(), and vorbis_parse_setup_hdr_residues().

#define V_MAX_PARTITIONS (1 << 20)

Definition at line 41 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_residues().

#define V_MAX_VLCS (1 << 16)

Definition at line 40 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS 8

Definition at line 38 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS2 11

Definition at line 39 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define VALIDATE_INDEX	(	idx,
		limit		)

Value:

if (idx >= limit) {\
        av_log(vc->avccontext, AV_LOG_ERROR,\
               idx_err_str,\
               (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
        return -1;\
    }

Definition at line 165 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_floors().

Typedef Documentation

typedef struct vorbis_context_s vorbis_context

typedef struct vorbis_floor0_s vorbis_floor0

Definition at line 60 of file vorbis_dec.c.

typedef struct vorbis_floor1_s vorbis_floor1

Definition at line 61 of file vorbis_dec.c.

typedef union vorbis_floor_u vorbis_floor_data

Definition at line 59 of file vorbis_dec.c.

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

Definition at line 65 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 1459 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 767 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 1683 of file vorbis_dec.c.

static int vorbis_decode_frame	(	AVCodecContext *	avccontext,
		void *	data,
		int *	data_size,
		AVPacket *	avpkt
	)			`[static]`

Definition at line 1631 of file vorbis_dec.c.

static av_cold int vorbis_decode_init ( AVCodecContext * avccontext ) [static]

Definition at line 944 of file vorbis_dec.c.

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

Definition at line 1017 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 1130 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_floors().

static void vorbis_free ( vorbis_context * vc ) [static]

Definition at line 190 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 1435 of file vorbis_dec.c.

Referenced by dsputil_init().

static int vorbis_parse_audio_packet ( vorbis_context * vc ) [static]

Definition at line 1473 of file vorbis_dec.c.

Referenced by vorbis_decode_frame().

static int vorbis_parse_id_hdr ( vorbis_context * vc ) [static]

Definition at line 873 of file vorbis_dec.c.

Referenced by vorbis_decode_init().

static int vorbis_parse_setup_hdr ( vorbis_context * vc ) [static]

Definition at line 828 of file vorbis_dec.c.

Referenced by vorbis_decode_init().

static int vorbis_parse_setup_hdr_codebooks ( vorbis_context * vc ) [static]

Definition at line 234 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 461 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 706 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 803 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 638 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 435 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 1416 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 1263 of file vorbis_dec.c.

Referenced by vorbis_residue_decode().

static float vorbisfloat2float ( uint_fast32_t val ) [static]

Definition at line 178 of file vorbis_dec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

Variable Documentation

const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n" [static]

Definition at line 164 of file vorbis_dec.c.

AVCodec vorbis_decoder

Initial value:

 {
    "vorbis",
    AVMEDIA_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"),
    .channel_layouts = ff_vorbis_channel_layouts,
}

Definition at line 1692 of file vorbis_dec.c.


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))
#define	VALIDATE_INDEX(idx, limit)
#define	GET_VALIDATED_INDEX(idx, bits, limit)
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, AVPacket avpkt)
static av_cold int	vorbis_decode_close (AVCodecContext *avccontext)
Variables
static const char	idx_err_str [] = "Index value %d out of range (0 - %d) for %s at %s:%i\n"
AVCodec	vorbis_decoder