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vorbisdec.c File Reference

Vorbis I decoder. More...

#include <inttypes.h>
#include <math.h>
#include "libavutil/float_dsp.h"
#include "libavutil/avassert.h"
#include "avcodec.h"
#include "get_bits.h"
#include "fft.h"
#include "fmtconvert.h"
#include "internal.h"
#include "vorbis.h"
#include "vorbisdsp.h"
#include "xiph.h"

Go to the source code of this file.

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
 

Macros

#define 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 *)
 

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 int 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 *avctx)
 
static av_always_inline int setup_classifs (vorbis_context *vc, vorbis_residue *vr, uint8_t *do_not_decode, unsigned ch_used, int partition_count, int ptns_to_read)
 
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 ff_vorbis_inverse_coupling (float *mag, float *ang, intptr_t blocksize)
 
static int vorbis_parse_audio_packet (vorbis_context *vc, float **floor_ptr)
 
static int vorbis_decode_frame (AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
 
static av_cold int vorbis_decode_close (AVCodecContext *avctx)
 
static av_cold void vorbis_decode_flush (AVCodecContext *avctx)
 

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 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

Author
Denes Balatoni ( dbalatoni programozo hu )

Definition in file vorbisdec.c.

Macro Definition Documentation

#define BITSTREAM_READER_LE

Definition at line 32 of file vorbisdec.c.

#define V_NB_BITS   8

Definition at line 45 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS2   11

Definition at line 46 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_MAX_VLCS   (1 << 16)

Definition at line 47 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_MAX_PARTITIONS   (1 << 20)

Definition at line 48 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_residues().

#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 vorbisdec.c.

Referenced by create_map().

#define VALIDATE_INDEX (   idx,
  limit 
)
Value:
if (idx >= limit) {\
av_log(vc->avctx, AV_LOG_ERROR,\
(int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
}

Definition at line 165 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

#define GET_VALIDATED_INDEX (   idx,
  bits,
  limit 
)

Typedef Documentation

typedef union vorbis_floor_u vorbis_floor_data

Definition at line 59 of file vorbisdec.c.

typedef struct vorbis_floor0_s vorbis_floor0

Definition at line 60 of file vorbisdec.c.

typedef struct vorbis_floor1_s vorbis_floor1

Definition at line 61 of file vorbisdec.c.

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

Definition at line 65 of file vorbisdec.c.

Function Documentation

static float vorbisfloat2float ( unsigned  val)
static

Definition at line 178 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

static void vorbis_free ( vorbis_context vc)
static

Definition at line 190 of file vorbisdec.c.

Referenced by vorbis_decode_close(), vorbis_decode_frame(), and vorbis_decode_init().

static int vorbis_parse_setup_hdr_codebooks ( vorbis_context vc)
static

Definition at line 239 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_tdtransforms ( vorbis_context vc)
static

Definition at line 467 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

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

Definition at line 1078 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

static int create_map ( vorbis_context vc,
unsigned  floor_number 
)
static

Definition at line 834 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 1186 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

static int vorbis_parse_setup_hdr_floors ( vorbis_context vc)
static

Definition at line 493 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_residues ( vorbis_context vc)
static

Definition at line 678 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_mappings ( vorbis_context vc)
static

Definition at line 759 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_modes ( vorbis_context vc)
static

Definition at line 869 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr ( vorbis_context vc)
static

Definition at line 898 of file vorbisdec.c.

Referenced by vorbis_decode_frame(), and vorbis_decode_init().

static int vorbis_parse_id_hdr ( vorbis_context vc)
static

Definition at line 944 of file vorbisdec.c.

Referenced by vorbis_decode_frame(), and vorbis_decode_init().

static av_cold int vorbis_decode_init ( AVCodecContext avctx)
static

Definition at line 1011 of file vorbisdec.c.

static av_always_inline int setup_classifs ( vorbis_context vc,
vorbis_residue vr,
uint8_t do_not_decode,
unsigned  ch_used,
int  partition_count,
int  ptns_to_read 
)
static

Definition at line 1313 of file vorbisdec.c.

Referenced by vorbis_residue_decode_internal().

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 1361 of file vorbisdec.c.

Referenced by vorbis_residue_decode().

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 
)
inlinestatic

Definition at line 1518 of file vorbisdec.c.

Referenced by vorbis_parse_audio_packet().

void ff_vorbis_inverse_coupling ( float *  mag,
float *  ang,
intptr_t  blocksize 
)

Definition at line 1536 of file vorbisdec.c.

Referenced by ff_vorbisdsp_init().

static int vorbis_parse_audio_packet ( vorbis_context vc,
float **  floor_ptr 
)
static

Definition at line 1562 of file vorbisdec.c.

Referenced by vorbis_decode_frame().

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

Definition at line 1725 of file vorbisdec.c.

static av_cold int vorbis_decode_close ( AVCodecContext avctx)
static

Definition at line 1815 of file vorbisdec.c.

static av_cold void vorbis_decode_flush ( AVCodecContext avctx)
static

Definition at line 1824 of file vorbisdec.c.

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 vorbisdec.c.

AVCodec ff_vorbis_decoder
Initial value:
= {
.name = "vorbis",
.long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
.priv_data_size = sizeof(vorbis_context),
.capabilities = CODEC_CAP_DR1,
.channel_layouts = ff_vorbis_channel_layouts,
}

Definition at line 1836 of file vorbisdec.c.