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"

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 1823 of file vorbisdec.c.

static av_cold void vorbis_decode_flush ( AVCodecContext * avctx )

static

Definition at line 1832 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    = AV_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 1844 of file vorbisdec.c.

Data Structures

Macros

Typedefs

Functions

Variables

Detailed Description

Macro Definition Documentation

Typedef Documentation

Function Documentation

Variable Documentation