libavcodec/vorbisenc.c File Reference

Native Vorbis encoder. More...

#include <float.h>
#include "avcodec.h"
#include "dsputil.h"
#include "fft.h"
#include "vorbis.h"
#include "vorbis_enc_data.h"
#include "put_bits.h"
#include <assert.h>

Go to the source code of this file.

Data Structures
struct	vorbis_enc_codebook
struct	vorbis_enc_floor_class
struct	vorbis_enc_floor
struct	vorbis_enc_residue
struct	vorbis_enc_mapping
struct	vorbis_enc_mode
struct	vorbis_enc_context
Defines
#define	BITSTREAM_WRITER_LE
#define	MAX_CHANNELS   2
#define	MAX_CODEBOOK_DIM   8
#define	MAX_FLOOR_CLASS_DIM   4
#define	NUM_FLOOR_PARTITIONS   8
#define	MAX_FLOOR_VALUES   (MAX_FLOOR_CLASS_DIM*NUM_FLOOR_PARTITIONS+2)
#define	RESIDUE_SIZE   1600
#define	RESIDUE_PART_SIZE   32
#define	NUM_RESIDUE_PARTITIONS   (RESIDUE_SIZE/RESIDUE_PART_SIZE)
Functions
static void	put_codeword (PutBitContext *pb, vorbis_enc_codebook *cb, int entry)
static int	cb_lookup_vals (int lookup, int dimentions, int entries)
static int	ready_codebook (vorbis_enc_codebook *cb)
static int	ready_residue (vorbis_enc_residue *rc, vorbis_enc_context *venc)
static int	create_vorbis_context (vorbis_enc_context *venc, AVCodecContext *avccontext)
static void	put_float (PutBitContext *pb, float f)
static void	put_codebook_header (PutBitContext *pb, vorbis_enc_codebook *cb)
static void	put_floor_header (PutBitContext *pb, vorbis_enc_floor *fc)
static void	put_residue_header (PutBitContext *pb, vorbis_enc_residue *rc)
static int	put_main_header (vorbis_enc_context *venc, uint8_t **out)
static float	get_floor_average (vorbis_enc_floor *fc, float *coeffs, int i)
static void	floor_fit (vorbis_enc_context *venc, vorbis_enc_floor *fc, float *coeffs, uint16_t *posts, int samples)
static int	render_point (int x0, int y0, int x1, int y1, int x)
static void	floor_encode (vorbis_enc_context *venc, vorbis_enc_floor *fc, PutBitContext *pb, uint16_t *posts, float *floor, int samples)
static float *	put_vector (vorbis_enc_codebook *book, PutBitContext *pb, float *num)
static void	residue_encode (vorbis_enc_context *venc, vorbis_enc_residue *rc, PutBitContext *pb, float *coeffs, int samples, int real_ch)
static int	apply_window_and_mdct (vorbis_enc_context *venc, const signed short *audio, int samples)
static int	vorbis_encode_frame (AVCodecContext *avccontext, unsigned char *packets, int buf_size, void *data)
static av_cold int	vorbis_encode_close (AVCodecContext *avccontext)
static av_cold int	vorbis_encode_init (AVCodecContext *avccontext)
Variables
AVCodec	ff_vorbis_encoder

---

Detailed Description

Native Vorbis encoder.

Author:

Oded Shimon <ods15@ods15.dyndns.org>

Definition in file vorbisenc.c.

---

Define Documentation

#define BITSTREAM_WRITER_LE

Definition at line 34 of file vorbisenc.c.

#define MAX_CHANNELS   2

Definition at line 129 of file vorbisenc.c.

#define MAX_CODEBOOK_DIM   8

Definition at line 130 of file vorbisenc.c.

Referenced by residue_encode().

#define MAX_FLOOR_CLASS_DIM   4

Definition at line 132 of file vorbisenc.c.

#define MAX_FLOOR_VALUES   (MAX_FLOOR_CLASS_DIM*NUM_FLOOR_PARTITIONS+2)

Definition at line 134 of file vorbisenc.c.

Referenced by floor_encode(), floor_fit(), and vorbis_encode_frame().

#define NUM_FLOOR_PARTITIONS   8

Definition at line 133 of file vorbisenc.c.

Referenced by create_vorbis_context().

#define NUM_RESIDUE_PARTITIONS   (RESIDUE_SIZE/RESIDUE_PART_SIZE)

Definition at line 138 of file vorbisenc.c.

Referenced by residue_encode().

#define RESIDUE_PART_SIZE   32

Definition at line 137 of file vorbisenc.c.

#define RESIDUE_SIZE   1600

Definition at line 136 of file vorbisenc.c.

---

Function Documentation

static int apply_window_and_mdct	(	vorbis_enc_context *	venc,
		const signed short *	audio,
		int	samples
	)			[static]

Definition at line 949 of file vorbisenc.c.

static int cb_lookup_vals	(	int	lookup,
		int	dimentions,
		int	entries
	)			[static]

Definition at line 149 of file vorbisenc.c.

Referenced by create_vorbis_context(), put_codebook_header(), and ready_codebook().

static int create_vorbis_context	(	vorbis_enc_context *	venc,
		AVCodecContext *	avccontext
	)			[static]

Definition at line 234 of file vorbisenc.c.

Referenced by vorbis_encode_init().

static void floor_encode	(	vorbis_enc_context *	venc,
		vorbis_enc_floor *	fc,
		PutBitContext *	pb,
		uint16_t *	posts,
		float *	floor,
		int	samples
	)			[static]

Definition at line 755 of file vorbisenc.c.

Referenced by vorbis_encode_frame().

static void floor_fit	(	vorbis_enc_context *	venc,
		vorbis_enc_floor *	fc,
		float *	coeffs,
		uint16_t *	posts,
		int	samples
	)			[static]

Definition at line 723 of file vorbisenc.c.

Referenced by vorbis_encode_frame().

static float get_floor_average	(	vorbis_enc_floor *	fc,
		float *	coeffs,
		int	i
	)			[static]

Definition at line 711 of file vorbisenc.c.

Referenced by floor_fit().

static void put_codebook_header	(	PutBitContext *	pb,
		vorbis_enc_codebook *	cb
	)			[static]

Definition at line 449 of file vorbisenc.c.

Referenced by put_main_header().

static void put_codeword	(	PutBitContext *	pb,
		vorbis_enc_codebook *	cb,
		int	entry
	)			[inline, static]

Definition at line 140 of file vorbisenc.c.

Referenced by floor_encode(), put_vector(), and residue_encode().

static void put_float	(	PutBitContext *	pb,
		float	f
	)			[static]

Definition at line 435 of file vorbisenc.c.

Referenced by put_codebook_header().

static void put_floor_header	(	PutBitContext *	pb,
		vorbis_enc_floor *	fc
	)			[static]

Definition at line 514 of file vorbisenc.c.

Referenced by put_main_header().

static int put_main_header	(	vorbis_enc_context *	venc,
		uint8_t **	out
	)			[static]

Definition at line 579 of file vorbisenc.c.

Referenced by vorbis_encode_init().

static void put_residue_header	(	PutBitContext *	pb,
		vorbis_enc_residue *	rc
	)			[static]

Definition at line 547 of file vorbisenc.c.

Referenced by put_main_header().

static float* put_vector	(	vorbis_enc_codebook *	book,
		PutBitContext *	pb,
		float *	num
	)			[static]

Definition at line 838 of file vorbisenc.c.

Referenced by residue_encode().

static int ready_codebook

(

vorbis_enc_codebook *

cb

)

[static]

Definition at line 158 of file vorbisenc.c.

Referenced by create_vorbis_context().

static int ready_residue	(	vorbis_enc_residue *	rc,
		vorbis_enc_context *	venc
	)			[static]

Definition at line 195 of file vorbisenc.c.

Referenced by create_vorbis_context().

static int render_point	(	int	x0,
		int	y0,
		int	x1,
		int	y1,
		int	x
	)			[static]

Definition at line 750 of file vorbisenc.c.

Referenced by floor_encode().

static void residue_encode	(	vorbis_enc_context *	venc,
		vorbis_enc_residue *	rc,
		PutBitContext *	pb,
		float *	coeffs,
		int	samples,
		int	real_ch
	)			[static]

Definition at line 860 of file vorbisenc.c.

Referenced by vorbis_encode_frame().

static av_cold int vorbis_encode_close

(

AVCodecContext *

avccontext

)

[static]

Definition at line 1065 of file vorbisenc.c.

Referenced by vorbis_encode_init().

static int vorbis_encode_frame	(	AVCodecContext *	avccontext,
		unsigned char *	packets,
		int	buf_size,
		void *	data
	)			[static]

Definition at line 1002 of file vorbisenc.c.

static av_cold int vorbis_encode_init

(

AVCodecContext *

avccontext

)

[static]

Definition at line 1125 of file vorbisenc.c.

---

Variable Documentation

AVCodec ff_vorbis_encoder

Initial value:

 {
    .name           = "vorbis",
    .type           = AVMEDIA_TYPE_AUDIO,
    .id             = CODEC_ID_VORBIS,
    .priv_data_size = sizeof(vorbis_enc_context),
    .init           = vorbis_encode_init,
    .encode         = vorbis_encode_frame,
    .close          = vorbis_encode_close,
    .capabilities= CODEC_CAP_DELAY | CODEC_CAP_EXPERIMENTAL,
    .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
    .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
}

Definition at line 1162 of file vorbisenc.c.