libavcodec/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 "dsputil.h"
#include "fft.h"
#include "fmtconvert.h"
#include "vorbis.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::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 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 ff_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 *got_frame_ptr, AVPacket *avpkt)
static av_cold int vorbis_decode_close (AVCodecContext *avccontext)
static av_cold void vorbis_decode_flush (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 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.


Define Documentation

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

Definition at line 163 of file vorbisdec.c.

Referenced by create_map().

#define BITSTREAM_READER_LE

Definition at line 32 of file vorbisdec.c.

#define GET_VALIDATED_INDEX ( idx,
bits,
limit   ) 

#define V_MAX_PARTITIONS   (1 << 20)

Definition at line 47 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_residues().

#define V_MAX_VLCS   (1 << 16)

Definition at line 46 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS   8

Definition at line 44 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS2   11

Definition at line 45 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 AVERROR_INVALIDDATA;\
    }

Definition at line 167 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().


Typedef Documentation

typedef struct vorbis_floor0_s vorbis_floor0

Definition at line 59 of file vorbisdec.c.

typedef struct vorbis_floor1_s vorbis_floor1

Definition at line 60 of file vorbisdec.c.

typedef union vorbis_floor_u vorbis_floor_data

Definition at line 58 of file vorbisdec.c.

Definition at line 64 of file vorbisdec.c.


Function Documentation

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

Definition at line 809 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

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

Definition at line 1464 of file vorbisdec.c.

Referenced by ff_dsputil_init().

static av_cold int vorbis_decode_close ( AVCodecContext avccontext  )  [static]

Definition at line 1711 of file vorbisdec.c.

static av_cold void vorbis_decode_flush ( AVCodecContext avccontext  )  [static]

Definition at line 1720 of file vorbisdec.c.

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

Definition at line 1653 of file vorbisdec.c.

static av_cold int vorbis_decode_init ( AVCodecContext avccontext  )  [static]

Definition at line 978 of file vorbisdec.c.

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

Definition at line 1054 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 1160 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

static void vorbis_free ( vorbis_context vc  )  [static]

Definition at line 192 of file vorbisdec.c.

Referenced by vorbis_decode_close(), and vorbis_decode_init().

static int vorbis_parse_audio_packet ( vorbis_context vc  )  [static]

Definition at line 1490 of file vorbisdec.c.

Referenced by vorbis_decode_frame().

static int vorbis_parse_id_hdr ( vorbis_context vc  )  [static]

Definition at line 913 of file vorbisdec.c.

Referenced by vorbis_decode_init().

static int vorbis_parse_setup_hdr ( vorbis_context vc  )  [static]

Definition at line 867 of file vorbisdec.c.

Referenced by vorbis_decode_init().

static int vorbis_parse_setup_hdr_codebooks ( vorbis_context vc  )  [static]

Definition at line 238 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_floors ( vorbis_context vc  )  [static]

Definition at line 487 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_mappings ( vorbis_context vc  )  [static]

Definition at line 742 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_modes ( vorbis_context vc  )  [static]

Definition at line 840 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_residues ( vorbis_context vc  )  [static]

Definition at line 662 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_tdtransforms ( vorbis_context vc  )  [static]

Definition at line 461 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 1446 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 1286 of file vorbisdec.c.

Referenced by vorbis_residue_decode().

static float vorbisfloat2float ( unsigned  val  )  [static]

Definition at line 180 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().


Variable Documentation

Initial value:

 {
    .name            = "vorbis",
    .type            = AVMEDIA_TYPE_AUDIO,
    .id              = AV_CODEC_ID_VORBIS,
    .priv_data_size  = sizeof(vorbis_context),
    .init            = vorbis_decode_init,
    .close           = vorbis_decode_close,
    .decode          = vorbis_decode_frame,
    .flush           = vorbis_decode_flush,
    .capabilities    = CODEC_CAP_DR1,
    .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 1731 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 166 of file vorbisdec.c.


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