hvirtual/quicktime/ffmpeg/libavcodec/vorbis.c File Reference

#include <math.h>
#include "avcodec.h"
#include "bitstream.h"
#include "dsputil.h"
#include "vorbis.h"
#include <assert.h>

Include dependency graph for vorbis.c:

Go to the source code of this file.

Defines
#define	ALT_BITSTREAM_READER_LE
#define	V_NB_BITS   8
#define	V_NB_BITS2   11
#define	V_MAX_VLCS   (1<<16)
#define	AV_DEBUG(...)
#define	ilog(i)   av_log2(2*(i))
#define	BIAS   385
Functions
unsigned int	get_bits_long_le (GetBitContext *s, int n)
static unsigned int	nth_root (unsigned int x, unsigned int n)
static float	vorbisfloat2float (uint_fast32_t val)
static int	vorbis_len2vlc (vorbis_context *vc, uint_fast8_t *bits, uint_fast32_t *codes, uint_fast32_t num)
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_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 int	vorbis_decode_init (AVCodecContext *avccontext)
static uint_fast8_t	vorbis_floor1_decode (vorbis_context *vc, vorbis_floor *vf, float *vec)
static int	vorbis_residue_decode (vorbis_context *vc, vorbis_residue *vr, uint_fast8_t ch, uint_fast8_t *do_not_decode, float *vec, uint_fast16_t vlen)
static int	vorbis_parse_audio_packet (vorbis_context *vc)
static int	vorbis_decode_frame (AVCodecContext *avccontext, void *data, int *data_size, uint8_t *buf, int buf_size)
static int	vorbis_decode_close (AVCodecContext *avccontext)
Variables
AVCodec	vorbis_decoder

---

Define Documentation

#define ALT_BITSTREAM_READER_LE

Definition at line 26 of file vorbis.c.

#define AV_DEBUG

(

...

)

Definition at line 38 of file vorbis.c.

Referenced by vorbis_decode_frame(), vorbis_floor1_decode(), vorbis_parse_audio_packet(), vorbis_parse_id_hdr(), vorbis_parse_setup_hdr_codebooks(), vorbis_parse_setup_hdr_floors(), vorbis_parse_setup_hdr_mappings(), vorbis_parse_setup_hdr_modes(), vorbis_parse_setup_hdr_residues(), vorbis_parse_setup_hdr_tdtransforms(), and vorbis_residue_decode().

#define BIAS   385

Definition at line 1195 of file vorbis.c.

#define ilog

(

i

)

av_log2(2*(i))

Definition at line 57 of file vorbis.c.

Referenced by vorbis_floor1_decode(), vorbis_parse_audio_packet(), vorbis_parse_setup_hdr_codebooks(), vorbis_parse_setup_hdr_mappings(), and vorbis_parse_setup_hdr_residues().

#define V_MAX_VLCS   (1<<16)

Definition at line 35 of file vorbis.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS   8

Definition at line 33 of file vorbis.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

#define V_NB_BITS2   11

Definition at line 34 of file vorbis.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

---

Function Documentation

unsigned int get_bits_long_le	(	GetBitContext *	s,
		int	n
	)

reads 0-32 bits when using the ALT_BITSTREAM_READER_LE bitstream reader

Definition at line 49 of file vorbis.c.

References get_bits().

Referenced by vorbis_parse_id_hdr(), and vorbis_parse_setup_hdr_codebooks().

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static unsigned int nth_root	(	unsigned int	x,
		unsigned int	n
	)			[static]

Definition at line 59 of file vorbis.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

static int vorbis_decode_close

(

AVCodecContext *

avccontext

)

[static]

Definition at line 1453 of file vorbis.c.

References AVCodecContext::priv_data, and vorbis_free().

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static int vorbis_decode_frame	(	AVCodecContext *	avccontext,
		void *	data,
		int *	data_size,
		uint8_t *	buf,
		int	buf_size
	)			[static]

Definition at line 1404 of file vorbis.c.

References AV_DEBUG, vorbis_context::first_frame, vorbis_context::gb, get_bits_count(), init_get_bits(), AVCodecContext::priv_data, vorbis_context::ret, and vorbis_parse_audio_packet().

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static int vorbis_decode_init

(

AVCodecContext *

avccontext

)

[static]

Definition at line 784 of file vorbis.c.

References vorbis_context::audio_channels, vorbis_context::audio_samplerate, av_log(), AV_LOG_ERROR, vorbis_context::avccontext, AVCodecContext::channels, AVCodecContext::extradata, AVCodecContext::extradata_size, vorbis_context::gb, get_bits(), init_get_bits(), AVCodecContext::priv_data, AVCodecContext::sample_rate, vorbis_free(), vorbis_parse_id_hdr(), and vorbis_parse_setup_hdr().

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static uint_fast8_t vorbis_floor1_decode	(	vorbis_context *	vc,
		vorbis_floor *	vf,
		float *	vec
	)			[static]

Definition at line 864 of file vorbis.c.

References ABS, AV_DEBUG, vorbis_floor::class_dimensions, vorbis_floor::class_masterbook, vorbis_floor::class_subclasses, vorbis_context::codebooks, floor1_inverse_db_table, vorbis_context::gb, get_bits(), get_bits1(), get_bits_count(), get_vlc2(), vorbis_floor::high_neighbour, ilog, vorbis_floor::low_neighbour, vorbis_floor::multiplier, vorbis_codebook::nb_bits, offset, vorbis_floor::partition_class, vorbis_floor::partitions, vorbis_floor::subclass_books, VLC::table, vorbis_codebook::vlc, vorbis_floor::x_list, vorbis_floor::x_list_dim, and vorbis_floor::x_list_order.

Referenced by vorbis_parse_audio_packet().

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static void vorbis_free

(

vorbis_context *

vc

)

[static]

Definition at line 146 of file vorbis.c.

References vorbis_mapping::angle, av_free(), av_freep(), vorbis_context::buf, vorbis_context::buf_tmp, vorbis_context::channel_floors, vorbis_context::channel_residues, vorbis_context::codebook_count, vorbis_context::codebooks, vorbis_codebook::codevectors, ff_mdct_end(), vorbis_context::floor_count, vorbis_context::floors, free_vlc(), vorbis_floor::high_neighbour, vorbis_floor::low_neighbour, vorbis_mapping::magnitude, vorbis_context::mapping_count, vorbis_context::mappings, vorbis_context::mdct0, vorbis_context::mdct1, vorbis_context::modes, vorbis_mapping::mux, vorbis_context::residues, vorbis_context::ret, vorbis_context::saved, vorbis_codebook::vlc, vorbis_floor::x_list, and vorbis_floor::x_list_order.

Referenced by vorbis_decode_close(), and vorbis_decode_init().

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static int vorbis_len2vlc	(	vorbis_context *	vc,
		uint_fast8_t *	bits,
		uint_fast32_t *	codes,
		uint_fast32_t	num
	)			[static]

Definition at line 80 of file vorbis.c.

References av_log(), AV_LOG_INFO, vorbis_context::avccontext, get_bits1(), and init_get_bits().

Referenced by vorbis_parse_setup_hdr_codebooks().

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static int vorbis_parse_audio_packet

(

vorbis_context *

vc

)

[static]

Definition at line 1197 of file vorbis.c.

References vorbis_mapping::angle, audio_channels, vorbis_context::audio_channels, AV_DEBUG, av_log(), AV_LOG_ERROR, vorbis_context::avccontext, BIAS, vorbis_mode::blockflag, vorbis_context::blocksize_0, vorbis_context::blocksize_1, vorbis_context::buf, buf, vorbis_context::buf_tmp, vorbis_context::channel_floors, vorbis_context::channel_residues, vorbis_mapping::coupling_steps, ff_imdct_calc(), vorbis_context::floors, vorbis_context::gb, get_bits(), get_bits1(), ilog, vorbis_context::lwin, vorbis_mapping::magnitude, vorbis_mode::mapping, vorbis_context::mappings, vorbis_context::mdct0, vorbis_context::mdct1, vorbis_context::mode_count, vorbis_context::modes, vorbis_mapping::mux, vorbis_context::residues, vorbis_context::ret, vorbis_context::saved, vorbis_context::saved_start, step, vorbis_mapping::submap_floor, vorbis_mapping::submap_residue, vorbis_mapping::submaps, vorbis_context::swin, vorbis_floor1_decode(), and vorbis_residue_decode().

Referenced by vorbis_decode_frame().

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static int vorbis_parse_id_hdr

(

vorbis_context *

vc

)

[static]

Definition at line 724 of file vorbis.c.

References vorbis_context::audio_channels, vorbis_context::audio_samplerate, AV_DEBUG, av_log(), AV_LOG_ERROR, av_malloc(), vorbis_context::avccontext, vorbis_context::bitrate_maximum, vorbis_context::bitrate_minimum, vorbis_context::bitrate_nominal, vorbis_context::blocksize_0, vorbis_context::blocksize_1, vorbis_context::buf, vorbis_context::buf_tmp, vorbis_context::channel_floors, vorbis_context::channel_residues, ff_mdct_init(), vorbis_context::gb, get_bits(), get_bits1(), get_bits_long_le(), vorbis_context::lwin, vorbis_context::mdct0, vorbis_context::mdct1, vorbis_context::ret, vorbis_context::saved, vorbis_context::saved_start, vorbis_context::swin, vorbis_context::version, vwin1024, vwin128, vwin2048, vwin256, vwin4096, vwin512, vwin64, and vwin8192.

Referenced by vorbis_decode_init().

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static int vorbis_parse_setup_hdr

(

vorbis_context *

vc

)

[static]

Definition at line 680 of file vorbis.c.

References av_log(), AV_LOG_ERROR, vorbis_context::avccontext, vorbis_context::gb, get_bits(), get_bits1(), vorbis_parse_setup_hdr_codebooks(), vorbis_parse_setup_hdr_floors(), vorbis_parse_setup_hdr_mappings(), vorbis_parse_setup_hdr_modes(), vorbis_parse_setup_hdr_residues(), and vorbis_parse_setup_hdr_tdtransforms().

Referenced by vorbis_decode_init().

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static int vorbis_parse_setup_hdr_codebooks

(

vorbis_context *

vc

)

[static]

Definition at line 188 of file vorbis.c.

References AV_DEBUG, av_free(), av_log(), AV_LOG_ERROR, AV_LOG_INFO, av_mallocz(), vorbis_context::avccontext, cb, vorbis_context::codebook_count, vorbis_context::codebooks, vorbis_codebook::codevectors, vorbis_codebook::dimensions, error(), vorbis_context::gb, get_bits(), get_bits1(), get_bits_long_le(), ilog, init_vlc(), INIT_VLC_LE, vorbis_codebook::lookup_type, vorbis_codebook::maxdepth, vorbis_codebook::nb_bits, nth_root(), t, V_MAX_VLCS, V_NB_BITS, V_NB_BITS2, vorbis_codebook::vlc, vorbis_len2vlc(), and vorbisfloat2float().

Referenced by vorbis_parse_setup_hdr().

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static int vorbis_parse_setup_hdr_floors

(

vorbis_context *

vc

)

[static]

Definition at line 409 of file vorbis.c.

References AV_DEBUG, av_log(), AV_LOG_ERROR, av_mallocz(), vorbis_context::avccontext, vorbis_floor::class_dimensions, vorbis_floor::class_masterbook, vorbis_floor::class_subclasses, vorbis_context::floor_count, vorbis_floor::floor_type, vorbis_context::floors, vorbis_context::gb, get_bits(), vorbis_floor::high_neighbour, vorbis_floor::low_neighbour, vorbis_floor::maximum_class, vorbis_floor::multiplier, vorbis_floor::partition_class, vorbis_floor::partitions, vorbis_floor::subclass_books, vorbis_floor::x_list, vorbis_floor::x_list_dim, and vorbis_floor::x_list_order.

Referenced by vorbis_parse_setup_hdr().

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static int vorbis_parse_setup_hdr_mappings

(

vorbis_context *

vc

)

[static]

Definition at line 594 of file vorbis.c.

References vorbis_mapping::angle, vorbis_context::audio_channels, AV_DEBUG, av_log(), AV_LOG_ERROR, av_mallocz(), vorbis_context::avccontext, vorbis_mapping::coupling_steps, vorbis_context::gb, get_bits(), get_bits1(), ilog, vorbis_mapping::magnitude, vorbis_context::mapping_count, vorbis_context::mappings, vorbis_mapping::mux, vorbis_mapping::submap_floor, vorbis_mapping::submap_residue, and vorbis_mapping::submaps.

Referenced by vorbis_parse_setup_hdr().

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static int vorbis_parse_setup_hdr_modes

(

vorbis_context *

vc

)

[static]

Definition at line 656 of file vorbis.c.

References AV_DEBUG, av_mallocz(), vorbis_mode::blockflag, vorbis_context::gb, get_bits(), vorbis_mode::mapping, vorbis_context::mode_count, vorbis_context::modes, vorbis_mode::transformtype, and vorbis_mode::windowtype.

Referenced by vorbis_parse_setup_hdr().

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static int vorbis_parse_setup_hdr_residues

(

vorbis_context *

vc

)

[static]

Definition at line 533 of file vorbis.c.

References AV_DEBUG, av_mallocz(), vorbis_residue::begin, vorbis_residue::books, vorbis_residue::classbook, vorbis_residue::classifications, vorbis_residue::end, vorbis_context::gb, get_bits(), get_bits1(), ilog, vorbis_residue::maxpass, vorbis_residue::partition_size, vorbis_context::residue_count, vorbis_context::residues, and vorbis_residue::type.

Referenced by vorbis_parse_setup_hdr().

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static int vorbis_parse_setup_hdr_tdtransforms

(

vorbis_context *

vc

)

[static]

Definition at line 389 of file vorbis.c.

References AV_DEBUG, av_log(), AV_LOG_ERROR, vorbis_context::avccontext, vorbis_context::gb, and get_bits().

Referenced by vorbis_parse_setup_hdr().

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static int vorbis_residue_decode	(	vorbis_context *	vc,
		vorbis_residue *	vr,
		uint_fast8_t	ch,
		uint_fast8_t *	do_not_decode,
		float *	vec,
		uint_fast16_t	vlen
	)			[static]

Definition at line 1069 of file vorbis.c.

References vorbis_context::audio_channels, AV_DEBUG, av_log(), AV_LOG_ERROR, vorbis_context::avccontext, vorbis_residue::begin, vorbis_residue::books, vorbis_residue::classbook, vorbis_residue::classifications, vorbis_context::codebooks, vorbis_codebook::codevectors, vorbis_codebook::dimensions, vorbis_residue::end, vorbis_context::gb, get_vlc2(), inverse, vorbis_residue::maxpass, vorbis_codebook::nb_bits, vorbis_residue::partition_size, step, VLC::table, vorbis_residue::type, and vorbis_codebook::vlc.

Referenced by vorbis_parse_audio_packet().

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static float vorbisfloat2float

(

uint_fast32_t

val

)

[static]

Definition at line 70 of file vorbis.c.

Referenced by vorbis_parse_setup_hdr_codebooks().

---

Variable Documentation

AVCodec vorbis_decoder

Initial value:

 {
    "vorbis",
    CODEC_TYPE_AUDIO,
    CODEC_ID_VORBIS,
    sizeof(vorbis_context),
    vorbis_decode_init,
    NULL,
    vorbis_decode_close,
    vorbis_decode_frame,
}

Definition at line 1461 of file vorbis.c.

Referenced by avcodec_register_all().