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 "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 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 V_MAX_VLCS   (1 << 16)

Definition at line 46 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_MAX_PARTITIONS   (1 << 20)

Definition at line 47 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 159 of file vorbisdec.c.

Referenced by create_map().

#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 163 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_floors().

#define GET_VALIDATED_INDEX	(		idx,
			bits,
			limit
	)

Value:

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

Definition at line 170 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().

Typedef Documentation

typedef union vorbis_floor_u vorbis_floor_data

Definition at line 58 of file vorbisdec.c.

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

Definition at line 64 of file vorbisdec.c.

Function Documentation

static float vorbisfloat2float ( unsigned  val )

static

Definition at line 176 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

static void vorbis_free ( vorbis_context *  vc )

static

Definition at line 188 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 238 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_tdtransforms ( vorbis_context *  vc )

static

Definition at line 473 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 1085 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 840 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 1193 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 499 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_residues ( vorbis_context *  vc )

static

Definition at line 684 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_mappings ( vorbis_context *  vc )

static

Definition at line 765 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_modes ( vorbis_context *  vc )

static

Definition at line 875 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr ( vorbis_context *  vc )

static

Definition at line 904 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 950 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 1020 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 1320 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 1364 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 1521 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 1539 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 1565 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 1728 of file vorbisdec.c.

static av_cold int vorbis_decode_close ( AVCodecContext *  avctx )

static

Definition at line 1818 of file vorbisdec.c.

static av_cold void vorbis_decode_flush ( AVCodecContext *  avctx )

static

Definition at line 1827 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 162 of file vorbisdec.c.

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    = CODEC_CAP_DR1,
    .channel_layouts = ff_vorbis_channel_layouts,
    .sample_fmts     = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
                                                       AV_SAMPLE_FMT_NONE },
}

Definition at line 1839 of file vorbisdec.c.