filters.c File Reference

Include dependency graph for filters.c:

Data Structures
struct	aout_filter
struct	aout_filters
struct	filter_owner_sys

Macros
#define	AOUT_MAX_FILTERS   10

Functions
static void	aout_filter_Init (struct aout_filter *tab, filter_t *f)
filter_t *	aout_filter_Create (vlc_object_t *obj, const filter_owner_t *restrict owner, const char *type, const char *name, const audio_sample_format_t *infmt, const audio_sample_format_t *outfmt, config_chain_t *cfg, bool const_fmt)
static filter_t *	FindConverter (vlc_object_t *obj, const audio_sample_format_t *infmt, const audio_sample_format_t *outfmt)
static filter_t *	FindResampler (vlc_object_t *obj, const audio_sample_format_t *infmt, const audio_sample_format_t *outfmt)
static void	aout_FilterDestroy (filter_t *filter)
static void	aout_FiltersPipelineDestroy (struct aout_filter *tab, unsigned n)
	Destroys a chain of audio filters.
static filter_t *	TryFormat (vlc_object_t *obj, vlc_fourcc_t codec, audio_sample_format_t *restrict fmt)
static int	aout_FiltersPipelineCreate (vlc_object_t *obj, struct aout_filter *filters, unsigned *count, unsigned max, const audio_sample_format_t *restrict infmt, const audio_sample_format_t *restrict outfmt)
	Allocates audio format conversion filters.
static block_t *	aout_FiltersPipelinePlay (const struct aout_filter *tab, unsigned count, block_t *block)
	Filters an audio buffer through a chain of filters.
static block_t *	aout_FiltersPipelineDrain (const struct aout_filter *tab, unsigned count)
	Drain the chain of filters.
static void	aout_FiltersPipelineFlush (const struct aout_filter *tab, unsigned count)
	Flush the chain of filters.
static void	aout_FiltersPipelineChangeViewpoint (const struct aout_filter *tab, unsigned count, const vlc_viewpoint_t *vp)
static int	VisualizationCallback (vlc_object_t *obj, const char *var, vlc_value_t oldval, vlc_value_t newval, void *data)
	Callback for visualization selection.
vout_thread_t *	aout_filter_GetVout (filter_t *filter, const video_format_t *fmt)
	Create a vout from an "visualization" audio filter.
static int	AppendFilter (vlc_object_t *obj, const char *type, const char *name, aout_filters_t *restrict filters, audio_sample_format_t *restrict infmt, const audio_sample_format_t *restrict outfmt, config_chain_t *cfg)
static int	AppendRemapFilter (vlc_object_t *obj, aout_filters_t *restrict filters, audio_sample_format_t *restrict infmt, const audio_sample_format_t *restrict outfmt, const int *wg4_remap)
aout_filters_t *	aout_FiltersNewWithClock (vlc_object_t *obj, vlc_clock_t *clock, const audio_sample_format_t *restrict infmt, const audio_sample_format_t *restrict outfmt, const aout_filters_cfg_t *cfg)
static void	aout_FiltersPipelineResetClock (const struct aout_filter *tab, unsigned count)
void	aout_FiltersResetClock (aout_filters_t *filters)
static void	aout_FiltersPipelineSetClockDelay (const struct aout_filter *tab, unsigned count, vlc_tick_t delay)
void	aout_FiltersSetClockDelay (aout_filters_t *filters, vlc_tick_t delay)
aout_filters_t *	aout_FiltersNew (vlc_object_t *obj, const audio_sample_format_t *restrict infmt, const audio_sample_format_t *restrict outfmt, const aout_filters_cfg_t *cfg)
	Sets a chain of audio filters up.
void	aout_FiltersDelete (vlc_object_t *obj, aout_filters_t *filters)
	Destroys a chain of audio filters.
bool	aout_FiltersCanResample (aout_filters_t *filters)
bool	aout_FiltersAdjustResampling (aout_filters_t *filters, int adjust)
block_t *	aout_FiltersPlay (aout_filters_t *filters, block_t *block, float rate)
block_t *	aout_FiltersDrain (aout_filters_t *filters)
void	aout_FiltersFlush (aout_filters_t *filters)
void	aout_FiltersChangeViewpoint (aout_filters_t *filters, const vlc_viewpoint_t *vp)

Macro Definition Documentation

AOUT_MAX_FILTERS

#define AOUT_MAX_FILTERS   10

Function Documentation

aout_filter_Create()

filter_t * aout_filter_Create	(	vlc_object_t *	obj,
		const filter_owner_t *restrict	owner,
		const char *	type,
		const char *	name,
		const audio_sample_format_t *	infmt,
		const audio_sample_format_t *	outfmt,
		config_chain_t *	cfg,
		bool	const_fmt
	)

References AOUT_FMTS_IDENTICAL, aout_FormatNbChannels(), es_format_t::audio, vlc_filter_operations::filter_audio, filter_t::fmt_in, filter_t::fmt_out, audio_format_t::i_channels, es_format_t::i_codec, audio_format_t::i_format, audio_format_t::i_physical_channels, module_need, name, filter_t::ops, filter_t::owner, filter_t::p_cfg, filter_t::p_module, unlikely, vlc_custom_create, and vlc_object_delete.

Referenced by aout_FiltersPipelineCreate(), AppendFilter(), FindConverter(), FindResampler(), and vlc_audio_meter_CreatePluginFilter().

aout_filter_Init()

static void aout_filter_Init ( struct aout_filter *  tab, filter_t *  f  )

inlinestatic

References aout_filter::clock, aout_filter::f, and aout_filter::vout.

Referenced by aout_FiltersNewWithClock(), aout_FiltersPipelineCreate(), and AppendFilter().

aout_FilterDestroy()

static void aout_FilterDestroy ( filter_t *  filter )

static

References filter_Close(), module_unneed, filter_t::p_module, and vlc_object_delete.

Referenced by aout_FiltersPipelineDestroy(), and AppendFilter().

aout_FiltersCanResample()

bool aout_FiltersCanResample

(

aout_filters_t *

filters

)

References aout_filter::f, and aout_filters::resampler.

Referenced by stream_HandleDrift().

aout_FiltersNew()

aout_filters_t * aout_FiltersNew	(	vlc_object_t *	obj,
		const audio_sample_format_t *restrict	infmt,
		const audio_sample_format_t *restrict	outfmt,
		const aout_filters_cfg_t *	cfg
	)

Sets a chain of audio filters up.

Parameters

obj	parent object for the filters
infmt	chain input format [IN]
outfmt	chain output format [IN]
cfg	a valid aout_filters_cfg_t struct or NULL.

Returns

a filters chain or NULL on failure

References aout_FiltersNewWithClock().

aout_FiltersNewWithClock()

aout_filters_t * aout_FiltersNewWithClock	(	vlc_object_t *	obj,
		vlc_clock_t *	clock,
		const audio_sample_format_t *restrict	infmt,
		const audio_sample_format_t *restrict	outfmt,
		const aout_filters_cfg_t *	cfg
	)

References aout_filter_Init(), aout_FiltersPipelineCreate(), aout_FiltersPipelineDestroy(), AOUT_FMT_LINEAR, AOUT_FMTS_IDENTICAL, aout_FormatNbChannels(), aout_FormatPrepare(), aout_FormatPrint, aout_FormatsPrint, AOUT_MAX_FILTERS, aout_SetWavePhysicalChannels(), AppendFilter(), AppendRemapFilter(), AUDIO_CHANNEL_TYPE_BITMAP, audio_format_t::channel_type, filter_owner_sys::clock, aout_filters::clock_source, aout_filters::count, aout_filter::f, FindConverter(), FindResampler(), audio_format_t::i_channels, audio_format_t::i_rate, msg_Err, msg_Info, msg_Warn, name, p, aout_filters::rate_filter, aout_filters_cfg_t::remap, aout_filters::resampler, aout_filters::resampling, strcasecmp(), strsep(), aout_filters::tab, unlikely, var_AddCallback(), var_DelCallback(), var_InheritBool(), var_InheritString(), and VisualizationCallback().

Referenced by aout_FiltersNew().

aout_FiltersPipelineChangeViewpoint()

static void aout_FiltersPipelineChangeViewpoint ( const struct aout_filter *  tab, unsigned  count, const vlc_viewpoint_t *  vp  )

static

References count, and filter_ChangeViewpoint().

Referenced by aout_FiltersChangeViewpoint().

aout_FiltersPipelineCreate()

static int aout_FiltersPipelineCreate ( vlc_object_t *  obj, struct aout_filter *  filters, unsigned *  count, unsigned  max, const audio_sample_format_t *restrict  infmt, const audio_sample_format_t *restrict  outfmt  )

static

Allocates audio format conversion filters.

Parameters

obj	parent VLC object for new filters
filters	table of filters [IN/OUT]
count	pointer to the number of filters in the table [IN/OUT]
max	size of filters table [IN]
infmt	input audio format
outfmt	output audio format

Returns

0 on success, -1 on failure

References _, aout_filter_Create(), aout_filter_Init(), aout_FiltersPipelineDestroy(), AOUT_FMT_LINEAR, aout_FormatPrepare(), aout_FormatsPrint, audio_format_t::channel_type, count, FindConverter(), audio_format_t::i_chan_mode, audio_format_t::i_format, audio_format_t::i_physical_channels, audio_format_t::i_rate, msg_Dbg, msg_Err, TryFormat(), VLC_CODEC_FL32, and vlc_dialog_display_error.

Referenced by aout_FiltersNewWithClock(), and AppendFilter().

aout_FiltersPipelineDestroy()

static void aout_FiltersPipelineDestroy ( struct aout_filter *  tab, unsigned  n  )

static

Destroys a chain of audio filters.

References aout_FilterDestroy(), aout_filter::f, vlc_clock_Delete(), and vout_Close().

Referenced by aout_FiltersDelete(), aout_FiltersNewWithClock(), and aout_FiltersPipelineCreate().

aout_FiltersPipelineDrain()

static block_t * aout_FiltersPipelineDrain ( const struct aout_filter *  tab, unsigned  count  )

static

Drain the chain of filters.

References aout_FiltersPipelinePlay(), block_ChainAppend, block_ChainGather, count, aout_filter::f, and filter_DrainAudio().

Referenced by aout_FiltersDrain().

aout_FiltersPipelineFlush()

static void aout_FiltersPipelineFlush ( const struct aout_filter *  tab, unsigned  count  )

static

Flush the chain of filters.

References count, and filter_Flush().

Referenced by aout_FiltersFlush().

aout_FiltersPipelinePlay()

static block_t * aout_FiltersPipelinePlay ( const struct aout_filter *  tab, unsigned  count, block_t *  block  )

static

Filters an audio buffer through a chain of filters.

References count, aout_filter::f, vlc_filter_operations::filter_audio, and filter_t::ops.

Referenced by aout_FiltersDrain(), aout_FiltersPipelineDrain(), and aout_FiltersPlay().

aout_FiltersPipelineResetClock()

static void aout_FiltersPipelineResetClock ( const struct aout_filter *  tab, unsigned  count  )

static

References aout_filter::clock, filter_owner_sys::clock, count, vlc_clock_Lock(), vlc_clock_Reset(), and vlc_clock_Unlock().

Referenced by aout_FiltersResetClock().

aout_FiltersPipelineSetClockDelay()

static void aout_FiltersPipelineSetClockDelay ( const struct aout_filter *  tab, unsigned  count, vlc_tick_t  delay  )

static

References aout_filter::clock, filter_owner_sys::clock, count, vlc_clock_Lock(), vlc_clock_SetDelay(), and vlc_clock_Unlock().

Referenced by aout_FiltersSetClockDelay().

aout_FiltersResetClock()

void aout_FiltersResetClock

(

aout_filters_t *

filters

)

References aout_FiltersPipelineResetClock(), aout_filters::clock_source, aout_filters::count, and aout_filters::tab.

Referenced by stream_Reset().

aout_FiltersSetClockDelay()

void aout_FiltersSetClockDelay	(	aout_filters_t *	filters,
		vlc_tick_t	delay
	)

References aout_FiltersPipelineSetClockDelay(), aout_filters::clock_source, aout_filters::count, and aout_filters::tab.

Referenced by stream_CheckReady(), stream_Reset(), and vlc_aout_stream_Play().

AppendFilter()

static int AppendFilter ( vlc_object_t *  obj, const char *  type, const char *  name, aout_filters_t *restrict  filters, audio_sample_format_t *restrict  infmt, const audio_sample_format_t *restrict  outfmt, config_chain_t *  cfg  )

static

References aout_filter_Create(), aout_filter_Init(), aout_FilterDestroy(), aout_FiltersPipelineCreate(), es_format_t::audio, filter_owner_sys::clock, filter_owner_sys::clock_source, filter_t::fmt_in, filter_t::fmt_out, msg_Err, name, filter_owner_t::sys, vlc_clock_Delete(), filter_owner_sys::vout, and vout_Close().

Referenced by aout_FiltersNewWithClock(), and AppendRemapFilter().

AppendRemapFilter()

static int AppendRemapFilter ( vlc_object_t *  obj, aout_filters_t *restrict  filters, audio_sample_format_t *restrict  infmt, const audio_sample_format_t *restrict  outfmt, const int *  wg4_remap  )

static

References AOUT_CHAN_MAX, AppendFilter(), asprintf(), config_ChainCreate(), config_ChainDestroy(), and name.

Referenced by aout_FiltersNewWithClock().

FindConverter()

static filter_t * FindConverter ( vlc_object_t *  obj, const audio_sample_format_t *  infmt, const audio_sample_format_t *  outfmt  )

static

References aout_filter_Create().

Referenced by aout_FiltersNewWithClock(), aout_FiltersPipelineCreate(), and TryFormat().

FindResampler()

static filter_t * FindResampler ( vlc_object_t *  obj, const audio_sample_format_t *  infmt, const audio_sample_format_t *  outfmt  )

static

References aout_filter_Create(), and var_InheritString().

Referenced by aout_FiltersNewWithClock().

TryFormat()

static filter_t * TryFormat ( vlc_object_t *  obj, vlc_fourcc_t  codec, audio_sample_format_t *restrict  fmt  )

static

References aout_FormatPrepare(), FindConverter(), and audio_format_t::i_format.

Referenced by aout_FiltersPipelineCreate().

VisualizationCallback()

static int VisualizationCallback ( vlc_object_t *  obj, const char *  var, vlc_value_t  oldval, vlc_value_t  newval, void *  data  )

static

Callback for visualization selection.

References aout_InputRequestRestart(), vlc_value_t::psz_string, strcasecmp(), var, var_Create(), var_SetString(), VLC_SUCCESS, and VLC_VAR_STRING.

Referenced by aout_FiltersDelete(), and aout_FiltersNewWithClock().