Audio output modules interface. More...

Include dependency graph for vlc_aout.h:

Data Structures
struct	vlc_audio_output_events

struct	audio_output
	Audio output object. More...

struct	aout_filters_cfg_t

struct	vlc_audio_loudness
	Audio loudness measurement. More...

struct	vlc_audio_meter_cbs
	Audio meter callback. More...

struct	vlc_audio_meter_plugin_owner
	Audio meter plugin owner structure. More...

struct	vlc_audio_meter
	Audio meter structure. More...

Macros
#define	AOUT_MAX_ADVANCE_TIME (AOUT_MAX_PREPARE_TIME + VLC_TICK_FROM_SEC(1))

#define	AOUT_MAX_PREPARE_TIME VLC_TICK_FROM_SEC(2)

#define	AOUT_MIN_PREPARE_TIME AOUT_MAX_PTS_ADVANCE

#define	AOUT_MAX_PTS_ADVANCE VLC_TICK_FROM_MS(40)
	Maximum advance of actual audio playback time to coded PTS, above which downsampling will be performed.

#define	AOUT_MAX_PTS_DELAY VLC_TICK_FROM_MS(60)
	Maximum delay of actual audio playback time from coded PTS, above which upsampling will be performed.

#define	AOUT_MAX_RESAMPLING 10

#define	AOUT_FMTS_IDENTICAL(p_first, p_second)

#define	AOUT_FMTS_SIMILAR(p_first, p_second)

#define	AOUT_FMT_LINEAR(p_format) (aout_BitsPerSample((p_format)->i_format) != 0)

#define	VLC_CODEC_SPDIFL VLC_FOURCC('s','p','d','i')

#define	VLC_CODEC_SPDIFB VLC_FOURCC('s','p','d','b')

#define	AOUT_FMT_SPDIF(p_format)

#define	AOUT_FMT_HDMI(p_format)

#define	AOUT_VAR_CHAN_UNSET 0 /* must be zero */

#define	AOUT_VAR_CHAN_STEREO 1

#define	AOUT_VAR_CHAN_RSTEREO 2

#define	AOUT_VAR_CHAN_LEFT 3

#define	AOUT_VAR_CHAN_RIGHT 4

#define	AOUT_VAR_CHAN_DOLBYS 5

#define	AOUT_VAR_CHAN_MONO 7

#define	AOUT_MIX_MODE_UNSET 0

#define	AOUT_MIX_MODE_STEREO 1

#define	AOUT_MIX_MODE_BINAURAL 2

#define	AOUT_MIX_MODE_4_0 3

#define	AOUT_MIX_MODE_5_1 4

#define	AOUT_MIX_MODE_7_1 5

#define	AOUT_SPDIF_SIZE 6144

#define	A52_FRAME_NB 1536

#define	AOUT_RESTART_FILTERS 0x1

#define	AOUT_RESTART_OUTPUT (AOUT_RESTART_FILTERS\|0x2)

#define	AOUT_RESTART_STEREOMODE (AOUT_RESTART_OUTPUT\|0x4)

#define	aout_FormatPrint(o, t, f) aout_FormatPrint(VLC_OBJECT(o), t, f)

#define	AOUT_VOLUME_DEFAULT 256

#define	AOUT_VOLUME_MAX 512

#define	AOUT_CHAN_REMAP_INIT

#define	AOUT_FILTERS_CFG_INIT

#define	aout_FiltersNew(o, inf, outf, remap) aout_FiltersNew(VLC_OBJECT(o),inf,outf,remap)

#define	aout_FiltersDelete(o, f) aout_FiltersDelete(VLC_OBJECT(o),f)

#define	vlc_audio_meter_Init(a, b) vlc_audio_meter_Init(a, VLC_OBJECT(b))

Typedefs
typedef struct aout_filters	aout_filters_t

typedef struct vlc_audio_meter_plugin	vlc_audio_meter_plugin
	Audio meter plugin opaque structure.

Enumerations
enum	vlc_chan_order_idx_t { AOUT_CHANIDX_DISABLE = -1 , AOUT_CHANIDX_LEFT , AOUT_CHANIDX_RIGHT , AOUT_CHANIDX_MIDDLELEFT , AOUT_CHANIDX_MIDDLERIGHT , AOUT_CHANIDX_REARLEFT , AOUT_CHANIDX_REARRIGHT , AOUT_CHANIDX_REARCENTER , AOUT_CHANIDX_CENTER , AOUT_CHANIDX_LFE , AOUT_CHANIDX_MAX }

Functions
static void	aout_TimingReport (audio_output_t *aout, vlc_tick_t system_ts, vlc_tick_t audio_ts)
	Report a new timing point.

static void	aout_DrainedReport (audio_output_t *aout)
	Report than the stream is drained (after a call to aout->drain_async)

static void	aout_VolumeReport (audio_output_t *aout, float volume)
	Report change of configured audio volume to the core and UI.

static void	aout_MuteReport (audio_output_t *aout, bool mute)
	Report change of muted flag to the core and UI.

static void	aout_PolicyReport (audio_output_t *aout, bool cork)
	Report audio policy status.

static void	aout_DeviceReport (audio_output_t aout, const char id)
	Report change of output device.

static void	aout_HotplugReport (audio_output_t aout, const char id, const char *name)
	Report a device hot-plug event.

static int	aout_GainRequest (audio_output_t *aout, float gain)
	Request a change of software audio amplification.

static void	aout_RestartRequest (audio_output_t *aout, unsigned mode)

unsigned	aout_CheckChannelReorder (const uint32_t , const uint32_t , uint32_t mask, uint8_t *table)
	This function computes the reordering needed to go from pi_chan_order_in to pi_chan_order_out.

void	aout_ChannelReorder (void ptr, size_t bytes, uint8_t channels, const uint8_t chans_table, vlc_fourcc_t fourcc)
	Reorders audio samples within a block of linear audio interleaved samples.

bool	aout_CheckChannelExtraction (int pi_selection, uint32_t pi_layout, int pi_channels, const uint32_t pi_order_dst[9], const uint32_t pi_order_src, int i_channels)
	This function will compute the extraction parameter into pi_selection to go from i_channels with their type given by pi_order_src[] into the order describe by pi_order_dst.

void	aout_ChannelExtract (void p_dst, int i_dst_channels, const void p_src, int i_src_channels, int i_sample_count, const int *pi_selection, int i_bits_per_sample)
	Do the actual channels extraction using the parameters created by aout_CheckChannelExtraction.

void	aout_Interleave (void dst, const void const *planes, unsigned samples, unsigned channels, vlc_fourcc_t fourcc)

void	aout_Deinterleave (void dst, const void src, unsigned samples, unsigned channels, vlc_fourcc_t fourcc)

static unsigned	aout_FormatNbChannels (const audio_sample_format_t *fmt)

unsigned int	aout_BitsPerSample (vlc_fourcc_t i_format)

void	aout_FormatPrepare (audio_sample_format_t *p_format)

void	aout_FormatPrint (vlc_object_t , const char , const audio_sample_format_t *)
	Prints an audio sample format in a human-readable form.

const char *	aout_FormatPrintChannels (const audio_sample_format_t *)

float	aout_VolumeGet (audio_output_t *)
	Gets the volume of the audio output stream (independent of mute).

int	aout_VolumeSet (audio_output_t *, float)
	Sets the volume of the audio output stream.

int	aout_VolumeUpdate (audio_output_t aout, int value, float volp)
	Adjusts the volume.

int	aout_MuteGet (audio_output_t *)
	Gets the audio output stream mute flag.

int	aout_MuteSet (audio_output_t *, bool)
	Sets the audio output stream mute flag.

char *	aout_DeviceGet (audio_output_t *)
	Gets the currently selected device.

int	aout_DeviceSet (audio_output_t aout, const char id)
	Selects an audio output device.

int	aout_DevicesList (audio_output_t aout, char ids, char *names)
	Enumerates possible audio output devices.

int	aout_EnableFilter (audio_output_t aout, const char name, bool add)
	Enable or disable an audio filter ("audio-filter")

aout_filters_t *	aout_FiltersNew (vlc_object_t , const audio_sample_format_t , const audio_sample_format_t , const aout_filters_cfg_t cfg)

void	aout_FiltersDelete (vlc_object_t , aout_filters_t )
	Destroys a chain of audio filters.

bool	aout_FiltersAdjustResampling (aout_filters_t *, int)

block_t *	aout_FiltersPlay (aout_filters_t , block_t , float rate)

block_t *	aout_FiltersDrain (aout_filters_t *)

void	aout_FiltersFlush (aout_filters_t *)

void	aout_FiltersChangeViewpoint (aout_filters_t , const vlc_viewpoint_t vp)

vout_thread_t *	aout_filter_GetVout (filter_t , const video_format_t )
	Create a vout from an "visualization" audio filter.

void	vlc_audio_meter_Init (struct vlc_audio_meter meter, vlc_object_t parent)
	Initialize the audio meter structure.

void	vlc_audio_meter_Destroy (struct vlc_audio_meter *meter)
	Free allocated resource from the audio meter structure.

int	vlc_audio_meter_Reset (struct vlc_audio_meter meter, const audio_sample_format_t fmt)
	Set or reset the audio format.

vlc_audio_meter_plugin *	vlc_audio_meter_AddPlugin (struct vlc_audio_meter meter, const char chain, const struct vlc_audio_meter_plugin_owner *owner)
	Add an "audio meter" plugin.

void	vlc_audio_meter_RemovePlugin (struct vlc_audio_meter meter, vlc_audio_meter_plugin plugin)
	Remove an "audio meter" plugin.

void	vlc_audio_meter_Process (struct vlc_audio_meter meter, block_t block, vlc_tick_t date)
	Process an audio block.

void	vlc_audio_meter_Flush (struct vlc_audio_meter *meter)
	Flush all "audio meter" plugins.

Variables
static const uint32_t	pi_vlc_chan_order_wg4 []
	It describes the audio channel order VLC expect.

Detailed Description

Audio output modules interface.

Data Structures

Macros

Typedefs

Enumerations

Functions

Variables

Detailed Description