envelope.c File Reference

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <math.h>
#include <ogg/ogg.h>
#include "vorbis/codec.h"
#include "codec_internal.h"
#include "os.h"
#include "scales.h"
#include "envelope.h"
#include "mdct.h"
#include "misc.h"

Go to the source code of this file.

Functions
static int	_ve_amp (envelope_lookup *ve, vorbis_info_psy_global *gi, float *data, envelope_band *bands, envelope_filter_state *filters)
void	_ve_envelope_clear (envelope_lookup *e)
void	_ve_envelope_init (envelope_lookup *e, vorbis_info *vi)
int	_ve_envelope_mark (vorbis_dsp_state *v)
long	_ve_envelope_search (vorbis_dsp_state *v)
void	_ve_envelope_shift (envelope_lookup *e, long shift)

Function Documentation

static int _ve_amp ( envelope_lookup *  ve, vorbis_info_psy_global *  gi, float *  data, envelope_band *  bands, envelope_filter_state *  filters  )

static

Definition at line 90 of file envelope.c.

References envelope_filter_state::ampbuf, envelope_filter_state::ampptr, envelope_band::end, i, j, max, envelope_lookup::mdct, mdct_forward(), envelope_lookup::mdct_win, min, envelope_lookup::minenergy, envelope_filter_state::nearDC, envelope_filter_state::nearDC_acc, envelope_filter_state::nearDC_partialacc, envelope_filter_state::nearptr, vorbis_info_psy_global::preecho_thresh, ret, envelope_lookup::stretch, vorbis_info_psy_global::stretch_penalty, todB(), envelope_band::total, VE_AMP, VE_BANDS, VE_MINSTRETCH, VE_NEARDC, vec, and envelope_lookup::winlength.

Referenced by _ve_envelope_search().

void _ve_envelope_clear

(

envelope_lookup *

e

)

Definition at line 76 of file envelope.c.

References _ogg_free, envelope_lookup::band, envelope_lookup::filter, i, envelope_lookup::mark, envelope_lookup::mdct, mdct_clear(), envelope_lookup::mdct_win, memset, VE_BANDS, and envelope_band::window.

Referenced by vorbis_dsp_clear().

void _ve_envelope_init	(	envelope_lookup *	e,
		vorbis_info *	vi
	)

Definition at line 32 of file envelope.c.

References _ogg_calloc, _ogg_malloc, envelope_lookup::band, envelope_band::begin, codec_setup_info::blocksizes, envelope_lookup::ch, vorbis_info::channels, vorbis_info::codec_setup, envelope_lookup::cursor, envelope_band::end, envelope_lookup::filter, i, j, M_PI, envelope_lookup::mark, envelope_lookup::mdct, mdct_init(), envelope_lookup::mdct_win, envelope_lookup::minenergy, vorbis_info_psy_global::preecho_minenergy, codec_setup_info::psy_g_param, envelope_lookup::searchstep, sin(), envelope_lookup::storage, envelope_band::total, VE_BANDS, envelope_band::window, and envelope_lookup::winlength.

Referenced by vorbis_analysis_init().

int _ve_envelope_mark

(

vorbis_dsp_state *

v

)

Definition at line 330 of file envelope.c.

References vorbis_dsp_state::backend_state, codec_setup_info::blocksizes, vorbis_dsp_state::centerW, vorbis_info::codec_setup, envelope_lookup::curmark, i, vorbis_dsp_state::lW, envelope_lookup::mark, vorbis_dsp_state::nW, envelope_lookup::searchstep, vorbis_dsp_state::vi, vi, and vorbis_dsp_state::W.

Referenced by vorbis_analysis_blockout().

long _ve_envelope_search

(

vorbis_dsp_state *

v

)

Definition at line 216 of file envelope.c.

References _ogg_realloc, _ve_amp(), vorbis_dsp_state::backend_state, envelope_lookup::band, codec_setup_info::blocksizes, vorbis_dsp_state::centerW, envelope_lookup::ch, vorbis_info::codec_setup, envelope_lookup::curmark, envelope_lookup::current, envelope_lookup::cursor, envelope_lookup::filter, i, j, m, envelope_lookup::mark, memset, vorbis_dsp_state::pcm, vorbis_dsp_state::pcm_current, codec_setup_info::psy_g_param, ret, envelope_lookup::searchstep, envelope_lookup::storage, envelope_lookup::stretch, VE_BANDS, VE_MAXSTRETCH, VE_POST, VE_WIN, vorbis_dsp_state::vi, vi, and vorbis_dsp_state::W.

Referenced by vorbis_analysis_blockout().

void _ve_envelope_shift	(	envelope_lookup *	e,
		long	shift
	)

Definition at line 356 of file envelope.c.

References envelope_lookup::ch, envelope_lookup::curmark, envelope_lookup::current, envelope_lookup::cursor, envelope_lookup::filter, i, envelope_lookup::mark, memmove, envelope_lookup::searchstep, VE_BANDS, and VE_POST.

Referenced by vorbis_analysis_blockout().