equalizer.c File Reference

Include dependency graph for equalizer.c:


Data Structures
struct	filter_sys_t
	filter_sys_t: chroma method descriptor More...
struct	eqz_config_t
Defines
#define	PRESET_TEXT N_( "Equalizer preset" )
#define	PRESET_LONGTEXT N_("Preset to use for the equalizer." )
#define	BANDS_TEXT N_( "Bands gain")
#define	BANDS_LONGTEXT
#define	TWOPASS_TEXT N_( "Two pass" )
#define	TWOPASS_LONGTEXT
#define	PREAMP_TEXT N_("Global gain" )
#define	PREAMP_LONGTEXT N_("Set the global gain in dB (-20 ... 20)." )
#define	EQZ_IN_FACTOR (0.25)
Functions
static int	Open (vlc_object_t *)
	Probes and initializes.
static void	Close (vlc_object_t *)
	Releases resources.
int	vlc_entry__main (module_t *p_module)
const char *	vlc_entry_license__main (void)
static block_t *	DoWork (filter_t , block_t )
static int	EqzInit (filter_t *, int)
static void	EqzFilter (filter_t , float , float *, int, int)
static void	EqzClean (filter_t *)
static int	PresetCallback (vlc_object_t , char const , vlc_value_t, vlc_value_t, void *)
static int	PreampCallback (vlc_object_t , char const , vlc_value_t, vlc_value_t, void *)
static int	BandsCallback (vlc_object_t , char const , vlc_value_t, vlc_value_t, void *)
static int	TwoPassCallback (vlc_object_t , char const , vlc_value_t, vlc_value_t, void *)
static float	EqzConvertdB (float db)
Variables
static const eqz_config_t	eqz_config_44100_10b
static const eqz_config_t	eqz_config_48000_10b

Define Documentation

#define BANDS_LONGTEXT

Value:

N_( \
         "Don't use presets, but manually specified bands. You need to " \
         "provide 10 values between -20dB and 20dB, separated by spaces, " \
         "e.g. \"0 2 4 2 0 -2 -4 -2 0 2\"." )

#define BANDS_TEXT N_( "Bands gain")

#define EQZ_IN_FACTOR (0.25)

Referenced by EqzConvertdB(), and EqzFilter().

#define PREAMP_LONGTEXT N_("Set the global gain in dB (-20 ... 20)." )

#define PREAMP_TEXT N_("Global gain" )

#define PRESET_LONGTEXT N_("Preset to use for the equalizer." )

#define PRESET_TEXT N_( "Equalizer preset" )

#define TWOPASS_LONGTEXT

Value:

N_( "Filter the audio twice. This provides a more "  \
         "intense effect.")

#define TWOPASS_TEXT N_( "Two pass" )

Function Documentation

static int BandsCallback	(	vlc_object_t *	p_this,
		char const *	psz_cmd,
		vlc_value_t	oldval,
		vlc_value_t	newval,
		void *	p_data
	)			`[static]`

References EqzConvertdB(), filter_sys_t::f_amp, i, filter_sys_t::i_band, filter_sys_t::lock, vlc_value_t::psz_string, us_strtof(), vlc_mutex_lock(), vlc_mutex_unlock(), VLC_SUCCESS, and VLC_UNUSED.

Referenced by EqzClean(), and EqzInit().

static void Close ( vlc_object_t * p_this ) [static]

Releases resources.

Close the module.

Destroys the X11 window.

Disconnect from the X server.

Close a SDL video output.

It destroys an OpenGL vout display.

Terminate a vout display created by Open.

It destroyes a Direct3D vout display.

Terminate an output method created by Open.

Release the drawable.

Close a libcaca video output.

Close a aa video output method.

Close the filter.

Terminate a splitter module.

This function closes a clone video splitter module.

Common close function.

Releases allocate resources.

Close: Destructor.

Parameters:

	p_this	pointer to this filter object
	p_this,:	the filter object

static block_t * DoWork	(	filter_t *	p_filter,
		block_t *	p_in_buf
	)			`[static]`

References aout_FormatNbChannels(), es_format_t::audio, EqzFilter(), filter_t::fmt_in, block_t::i_nb_samples, and block_t::p_buffer.

static void EqzClean ( filter_t * p_filter ) [static]

References BandsCallback(), filter_sys_t::f_alpha, filter_sys_t::f_amp, filter_sys_t::f_beta, filter_sys_t::f_gamma, filter_t::p_parent, filter_t::p_sys, PreampCallback(), PresetCallback(), filter_sys_t::psz_newbands, TwoPassCallback(), and var_DelCallback.

static float EqzConvertdB ( float db ) [inline, static]

References EQZ_IN_FACTOR.

Referenced by BandsCallback(), and PresetCallback().

static void EqzFilter	(	filter_t *	p_filter,
		float *	out,
		float *	in,
		int	i_samples,
		int	i_channels
	)			`[static]`

References filter_sys_t::b_2eqz, EQZ_IN_FACTOR, filter_sys_t::f_alpha, filter_sys_t::f_amp, filter_sys_t::f_beta, filter_sys_t::f_gamma, filter_sys_t::f_gamp, i, filter_sys_t::i_band, filter_sys_t::lock, filter_t::p_sys, vlc_mutex_lock(), vlc_mutex_unlock(), filter_sys_t::x, filter_sys_t::x2, filter_sys_t::y, and filter_sys_t::y2.

Referenced by DoWork().

static int EqzInit	(	filter_t *	p_filter,
		int	i_rate
	)			`[static]`

static int Open ( vlc_object_t * p_this ) [static]

Probes and initializes.

Basic chorus/flanger/delay audio filter This implements a variable delay filter for VLC.

Todo:

Improve CDDB support (non-blocking, cache, .

Open the module.

Create an X11 window.

Probe the X server.

This function initializes SDL vout method.

It creates an OpenGL vout display.

This function allocates and initialize the DirectX vout display.

It creates a Direct3D vout display.

This function allocates and initializes a FB vout method.

Find the drawable set by libvlc application.

This function initializes libcaca vout method.

This function allocates and initializes a aa vout method.

This function allocates and initializes a Wall splitter module.

Open the filter.

This function allocates and initializes a Clone splitter module.

Open: initialize and create stuff.

Connect to the sftp server and ask for a file.

Parameters:

p_this,:

the vlc_object

Returns:: VLC_SUCCESS if everything was fine

Parameters:

	p_this
	p_this,:	the filter object

Returns:: VLC_SUCCESS or vlc error codes

Todo:: Reinstate meta codec name

static int PreampCallback	(	vlc_object_t *	p_this,
		char const *	psz_cmd,
		vlc_value_t	oldval,
		vlc_value_t	newval,
		void *	p_data
	)			`[static]`

References vlc_value_t::f_float, filter_sys_t::f_gamp, filter_sys_t::lock, vlc_mutex_lock(), vlc_mutex_unlock(), VLC_SUCCESS, and VLC_UNUSED.

Referenced by EqzClean(), and EqzInit().

static int PresetCallback	(	vlc_object_t *	p_aout,
		char const *	psz_cmd,
		vlc_value_t	oldval,
		vlc_value_t	newval,
		void *	p_data
	)			`[static]`

static int TwoPassCallback	(	vlc_object_t *	p_this,
		char const *	psz_cmd,
		vlc_value_t	oldval,
		vlc_value_t	newval,
		void *	p_data
	)			`[static]`

References filter_sys_t::b_2eqz, vlc_value_t::b_bool, filter_sys_t::lock, vlc_mutex_lock(), vlc_mutex_unlock(), VLC_SUCCESS, and VLC_UNUSED.

Referenced by EqzClean(), and EqzInit().

int vlc_entry__main ( module_t * p_module )

const char* vlc_entry_license__main ( void )

Variable Documentation

const eqz_config_t eqz_config_44100_10b [static]

Initial value:

{
    10,
    {
        {    60, 0.003013, 0.993973, 1.993901 },
        {   170, 0.008490, 0.983019, 1.982437 },
        {   310, 0.015374, 0.969252, 1.967331 },
        {   600, 0.029328, 0.941343, 1.934254 },
        {  1000, 0.047918, 0.904163, 1.884869 },
        {  3000, 0.130408, 0.739184, 1.582718 },
        {  6000, 0.226555, 0.546889, 1.015267 },
        { 12000, 0.344937, 0.310127, -0.181410 },
        { 14000, 0.366438, 0.267123, -0.521151 },
        { 16000, 0.379009, 0.241981, -0.808451 },
    }
}

const eqz_config_t eqz_config_48000_10b [static]

Initial value:

{
    10,
    {
        {    60, 0.002769, 0.994462, 1.994400 },
        {   170, 0.007806, 0.984388, 1.983897 },
        {   310, 0.014143, 0.971714, 1.970091 },
        {   600, 0.027011, 0.945978, 1.939979 },
        {  1000, 0.044203, 0.911595, 1.895241 },
        {  3000, 0.121223, 0.757553, 1.623767 },
        {  6000, 0.212888, 0.574224, 1.113145 },
        { 12000, 0.331347, 0.337307, 0.000000 },
        { 14000, 0.355263, 0.289473, -0.333740 },
        { 16000, 0.371900, 0.256201, -0.628100 }
    }
}

equalizer.c File Reference

Data Structures

Defines

Functions

Variables

Define Documentation

Function Documentation

Variable Documentation