FFmpeg
Data Structures | Macros | Typedefs | Functions | Variables
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"

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 35 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,\
(int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
}
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static const char idx_err_str[]
Definition: vorbisdec.c:162
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return

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)\
}
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#define VALIDATE_INDEX(idx, limit)
Definition: vorbisdec.c:163
uint8_t bits
Definition: vp3data.h:202

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
static int create_map ( vorbis_context vc,
unsigned  floor_number 
)
static
static int vorbis_floor1_decode ( vorbis_context vc,
vorbis_floor_data vfu,
float *  vec 
)
static
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 689 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_mappings ( vorbis_context vc)
static

Definition at line 770 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr_modes ( vorbis_context vc)
static

Definition at line 885 of file vorbisdec.c.

Referenced by vorbis_parse_setup_hdr().

static int vorbis_parse_setup_hdr ( vorbis_context vc)
static

Definition at line 914 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 960 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 1030 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 1336 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 1385 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 1560 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 1578 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 1604 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 1767 of file vorbisdec.c.

static av_cold int vorbis_decode_close ( AVCodecContext avctx)
static

Definition at line 1862 of file vorbisdec.c.

static av_cold void vorbis_decode_flush ( AVCodecContext avctx)
static

Definition at line 1871 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"),
.priv_data_size = sizeof(vorbis_context),
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
}
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
float, planar
Definition: samplefmt.h:69
static void flush(AVCodecContext *avctx)
static av_cold int vorbis_decode_close(AVCodecContext *avctx)
Definition: vorbisdec.c:1862
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
static int vorbis_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: vorbisdec.c:1767
const uint64_t ff_vorbis_channel_layouts[9]
Definition: vorbis_data.c:47
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:113
static av_cold int vorbis_decode_init(AVCodecContext *avctx)
Definition: vorbisdec.c:1030
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
Definition: vorbisdec.c:1871
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:405

Definition at line 1883 of file vorbisdec.c.