Vorbis I decoder. More...

#include <inttypes.h>
#include <math.h>
#include "avcodec.h"
#include "get_bits.h"
#include "dsputil.h"
#include "fft.h"
#include "fmtconvert.h"
#include "vorbis.h"
#include "xiph.h"
#include <assert.h>

Data Structures
struct	vorbis_codebook
struct	vorbis_floor
union	vorbis_floor::vorbis_floor_u
struct	vorbis_floor::vorbis_floor_u::vorbis_floor0_s
struct	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	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 (unsigned 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, unsigned 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, unsigned ch, uint8_t do_not_decode, float vec, unsigned vlen, unsigned ch_left, int vr_type)
static int	vorbis_residue_decode (vorbis_context vc, vorbis_residue vr, unsigned ch, uint8_t do_not_decode, float vec, unsigned vlen, unsigned ch_left)
void	vorbis_inverse_coupling (float mag, float ang, int blocksize)
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	ff_vorbis_decoder

Detailed Description

Vorbis I decoder.

Author:: Denes Balatoni ( dbalatoni programozo hu )

This file is part of Libav.

Libav 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.

Libav 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 Libav; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Definition in file vorbisdec.c.

Define Documentation

#define ALT_BITSTREAM_READER_LE

Definition at line 26 of file vorbisdec.c.

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

Definition at line 156 of file vorbisdec.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 167 of file vorbisdec.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 39 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_residues().

#define V_MAX_VLCS (1 << 16)

Definition at line 38 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS 8

Definition at line 36 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS2 11

Definition at line 37 of file vorbisdec.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 160 of file vorbisdec.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 54 of file vorbisdec.c.

typedef struct vorbis_floor1_s vorbis_floor1

Definition at line 55 of file vorbisdec.c.

typedef union vorbis_floor_u vorbis_floor_data

Definition at line 53 of file vorbisdec.c.

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

Definition at line 59 of file vorbisdec.c.

Function Documentation

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

Definition at line 786 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

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

Definition at line 1679 of file vorbisdec.c.

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

Definition at line 1622 of file vorbisdec.c.

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

Definition at line 961 of file vorbisdec.c.

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

Definition at line 1034 of file vorbisdec.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 1140 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

static void vorbis_free ( vorbis_context * vc ) [static]

Definition at line 185 of file vorbisdec.c.

Referenced by vorbis_decode_close(), and vorbis_decode_init().

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

Definition at line 1438 of file vorbisdec.c.

Referenced by dsputil_init().

static int vorbis_parse_audio_packet ( vorbis_context * vc ) [static]

Definition at line 1464 of file vorbisdec.c.

Referenced by vorbis_decode_frame().

static int vorbis_parse_id_hdr ( vorbis_context * vc ) [static]

Definition at line 890 of file vorbisdec.c.

Referenced by vorbis_decode_init().

static int vorbis_parse_setup_hdr ( vorbis_context * vc ) [static]

Definition at line 845 of file vorbisdec.c.

Referenced by vorbis_decode_init().

static int vorbis_parse_setup_hdr_codebooks ( vorbis_context * vc ) [static]

Definition at line 231 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_floors ( vorbis_context * vc ) [static]

Definition at line 468 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_mappings ( vorbis_context * vc ) [static]

Definition at line 719 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_modes ( vorbis_context * vc ) [static]

Definition at line 818 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_residues ( vorbis_context * vc ) [static]

Definition at line 639 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_tdtransforms ( vorbis_context * vc ) [static]

Definition at line 442 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_residue_decode	(	vorbis_context *	vc,
		vorbis_residue *	vr,
		unsigned	ch,
		uint8_t *	do_not_decode,
		float *	vec,
		unsigned	vlen,
		unsigned	ch_left
	)		`[inline, static]`

Definition at line 1420 of file vorbisdec.c.

Referenced by vorbis_parse_audio_packet().

static av_always_inline int vorbis_residue_decode_internal	(	vorbis_context *	vc,
		vorbis_residue *	vr,
		unsigned	ch,
		uint8_t *	do_not_decode,
		float *	vec,
		unsigned	vlen,
		unsigned	ch_left,
		int	vr_type
	)		`[static]`

Definition at line 1266 of file vorbisdec.c.

Referenced by vorbis_residue_decode().

static float vorbisfloat2float ( unsigned val ) [static]

Definition at line 173 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

Variable Documentation

AVCodec ff_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,
    .sample_fmts = (const enum AVSampleFormat[]) {
        AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE
    },
}

Definition at line 1688 of file vorbisdec.c.

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

Definition at line 159 of file vorbisdec.c.

Data Structures

Defines

Typedefs

Functions

Variables

Detailed Description

Define Documentation

Typedef Documentation

Function Documentation

Variable Documentation