vorbisdec.c File Reference

Vorbis I decoder. More...

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

Classes
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 struct vorbis_codebook	vorbis_codebook
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_floor	vorbis_floor
typedef struct vorbis_residue	vorbis_residue
typedef struct vorbis_mapping	vorbis_mapping
typedef struct vorbis_mode	vorbis_mode
typedef struct vorbis_context_s	vorbis_context

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

Variables
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 )

Macro Definition Documentation

GET_VALIDATED_INDEX

#define GET_VALIDATED_INDEX	(		idx,
			bits,
			limit
	)

Value:

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

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;\
    }

Variable Documentation

ff_vorbis_decoder

AVCodec ff_vorbis_decoder

Initial value:

= {
    .name            = "vorbis",
    .long_name       = NULL_IF_CONFIG_SMALL("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    = AV_CODEC_CAP_DR1,
    .caps_internal   = FF_CODEC_CAP_INIT_CLEANUP,
    .channel_layouts = ff_vorbis_channel_layouts,
    .sample_fmts     = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
}