vorbisdec.c File Reference

#include <inttypes.h>
#include <math.h>
#include "libavutil/avassert.h"
#include "libavutil/float_dsp.h"
#include "libavutil/tx.h"
#include "avcodec.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"
#include "vorbis.h"
#include "vorbisdsp.h"
#include "vorbis_data.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_s

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)
static int	vorbis_parse_audio_packet (vorbis_context *vc, float **floor_ptr)
static int	vorbis_decode_frame (AVCodecContext *avctx, AVFrame *frame, 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"
const FFCodec	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

Vorbis I decoder

Author

Denes Balatoni ( dbalatoni programozo hu )

Definition in file vorbisdec.c.

Macro Definition Documentation

BITSTREAM_READER_LE

#define BITSTREAM_READER_LE

Definition at line 36 of file vorbisdec.c.

V_NB_BITS

#define V_NB_BITS   8

Definition at line 46 of file vorbisdec.c.

V_NB_BITS2

#define V_NB_BITS2   11

Definition at line 47 of file vorbisdec.c.

V_MAX_VLCS

#define V_MAX_VLCS   (1 << 16)

Definition at line 48 of file vorbisdec.c.

V_MAX_PARTITIONS

#define V_MAX_PARTITIONS   (1 << 20)

Definition at line 49 of file vorbisdec.c.

BARK

#define BARK

(

x

)

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

Definition at line 164 of file vorbisdec.c.

VALIDATE_INDEX

#define VALIDATE_INDEX	(		idx,
			limit
	)

Value:

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

Definition at line 168 of file vorbisdec.c.

GET_VALIDATED_INDEX

#define GET_VALIDATED_INDEX	(		idx,
			bits,
			limit
	)

Value:

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

Definition at line 175 of file vorbisdec.c.

Typedef Documentation

vorbis_floor_data

typedef union vorbis_floor_u vorbis_floor_data

Definition at line 60 of file vorbisdec.c.

vorbis_floor0

typedef struct vorbis_floor0_s vorbis_floor0

Definition at line 61 of file vorbisdec.c.

vorbis_floor1

typedef struct vorbis_floor1_s vorbis_floor1

Definition at line 62 of file vorbisdec.c.

vorbis_floor_decode_func

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

Definition at line 66 of file vorbisdec.c.

Function Documentation

vorbisfloat2float()

static float vorbisfloat2float ( unsigned  val )

static

Definition at line 181 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

vorbis_free()

static void vorbis_free ( vorbis_context *  vc )

static

Definition at line 193 of file vorbisdec.c.

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

vorbis_parse_setup_hdr_codebooks()

static int vorbis_parse_setup_hdr_codebooks ( vorbis_context *  vc )

static

Definition at line 243 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

vorbis_parse_setup_hdr_tdtransforms()

static int vorbis_parse_setup_hdr_tdtransforms ( vorbis_context *  vc )

static

Definition at line 478 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

vorbis_floor0_decode()

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

static

Definition at line 1112 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

create_map()

static int create_map ( vorbis_context *  vc, unsigned  floor_number  )

static

Definition at line 855 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

vorbis_floor1_decode()

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

static

Definition at line 1226 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

vorbis_parse_setup_hdr_floors()

static int vorbis_parse_setup_hdr_floors ( vorbis_context *  vc )

static

Definition at line 504 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

vorbis_parse_setup_hdr_residues()

static int vorbis_parse_setup_hdr_residues ( vorbis_context *  vc )

static

Definition at line 694 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

vorbis_parse_setup_hdr_mappings()

static int vorbis_parse_setup_hdr_mappings ( vorbis_context *  vc )

static

Definition at line 775 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

vorbis_parse_setup_hdr_modes()

static int vorbis_parse_setup_hdr_modes ( vorbis_context *  vc )

static

Definition at line 890 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

vorbis_parse_setup_hdr()

static int vorbis_parse_setup_hdr ( vorbis_context *  vc )

static

Definition at line 919 of file vorbisdec.c.

Referenced by vorbis_decode_frame(), and vorbis_decode_init().

vorbis_parse_id_hdr()

static int vorbis_parse_id_hdr ( vorbis_context *  vc )

static

Definition at line 965 of file vorbisdec.c.

Referenced by vorbis_decode_frame(), and vorbis_decode_init().

vorbis_decode_init()

static av_cold int vorbis_decode_init ( AVCodecContext *  avctx )

static

Definition at line 1045 of file vorbisdec.c.

setup_classifs()

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 1353 of file vorbisdec.c.

Referenced by vorbis_residue_decode_internal().

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 1402 of file vorbisdec.c.

Referenced by vorbis_residue_decode().

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 1577 of file vorbisdec.c.

Referenced by vorbis_parse_audio_packet().

vorbis_parse_audio_packet()

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

static

Definition at line 1597 of file vorbisdec.c.

Referenced by vorbis_decode_frame().

vorbis_decode_frame()

static int vorbis_decode_frame ( AVCodecContext *  avctx, AVFrame *  frame, int *  got_frame_ptr, AVPacket *  avpkt  )

static

Definition at line 1762 of file vorbisdec.c.

vorbis_decode_close()

static av_cold int vorbis_decode_close ( AVCodecContext *  avctx )

static

Definition at line 1862 of file vorbisdec.c.

vorbis_decode_flush()

static av_cold void vorbis_decode_flush ( AVCodecContext *  avctx )

static

Definition at line 1871 of file vorbisdec.c.

Variable Documentation

idx_err_str

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

static

Definition at line 167 of file vorbisdec.c.

ff_vorbis_decoder

const FFCodec ff_vorbis_decoder

Initial value:

= {
    .p.name          = "vorbis",
    CODEC_LONG_NAME("Vorbis"),
    .p.type          = AVMEDIA_TYPE_AUDIO,
    .p.id            = AV_CODEC_ID_VORBIS,
    .priv_data_size  = sizeof(vorbis_context),
    .init            = vorbis_decode_init,
    .close           = vorbis_decode_close,
    FF_CODEC_DECODE_CB(vorbis_decode_frame),
    .flush           = vorbis_decode_flush,
    .p.capabilities  = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
    .caps_internal   = FF_CODEC_CAP_INIT_CLEANUP,
 
    .p.ch_layouts    = ff_vorbis_ch_layouts,
    .p.sample_fmts   = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
}

Definition at line 1882 of file vorbisdec.c.