common.c File Reference

Include dependency graph for common.c:

Functions
static void	aout_Destructor (vlc_object_t *p_this)
audio_output_t *	aout_New (vlc_object_t *p_parent)
void	aout_Destroy (audio_output_t *aout)
unsigned int	aout_BitsPerSample (vlc_fourcc_t i_format)
void	aout_FormatPrepare (audio_sample_format_t *p_format)
const char *	aout_FormatPrintChannels (const audio_sample_format_t *p_format)
void	aout_FormatPrint (vlc_object_t *obj, const char *psz_text, const audio_sample_format_t *p_format)
	Prints an audio sample format in a human-readable form.
void	aout_FormatsPrint (vlc_object_t *obj, const char *psz_text, const audio_sample_format_t *p_format1, const audio_sample_format_t *p_format2)
	Prints two formats in a human-readable form.
int	aout_CheckChannelReorder (const uint32_t *pi_chan_order_in, const uint32_t *pi_chan_order_out, uint32_t i_channel_mask, int i_channels, int *pi_chan_table)
	This function computes the reordering needed to go from pi_chan_order_in to pi_chan_order_out.
void	aout_ChannelReorder (uint8_t *p_buf, int i_buffer, int i_channels, const int *pi_chan_table, int i_bits_per_sample)
static void	ExtractChannel (uint8_t *pi_dst, int i_dst_channels, const uint8_t *pi_src, int i_src_channels, int i_sample_count, const int *pi_selection, int i_bytes)
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.
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 fonction 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.
static int	FilterOrder (const char *psz_name)
bool	aout_ChangeFilterString (vlc_object_t *p_obj, vlc_object_t *p_aout, const char *psz_variable, const char *psz_name, bool b_add)

---

Function Documentation

unsigned int aout_BitsPerSample

(

vlc_fourcc_t

i_format

)

References AUDIO_ES, VLC_CODEC_ALAW, VLC_CODEC_F32B, VLC_CODEC_F32L, VLC_CODEC_F64B, VLC_CODEC_F64L, VLC_CODEC_FI32, VLC_CODEC_MULAW, VLC_CODEC_S16B, VLC_CODEC_S16L, VLC_CODEC_S24B, VLC_CODEC_S24L, VLC_CODEC_S32B, VLC_CODEC_S32L, VLC_CODEC_S8, VLC_CODEC_U16B, VLC_CODEC_U16L, VLC_CODEC_U24B, VLC_CODEC_U24L, VLC_CODEC_U8, and vlc_fourcc_GetCodec().

Referenced by aout_FormatPrepare(), and EsOutUpdateInfo().

bool aout_ChangeFilterString	(	vlc_object_t *	p_obj,
		vlc_object_t *	p_aout,
		const char *	psz_variable,
		const char *	psz_name,
		bool	b_add
	)

References config_PutPsz, FilterOrder(), var_CreateGetString, var_Destroy, var_GetString, and var_SetString.

Referenced by aout_EnableFilter(), and ChangeFiltersString().

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.

XXX this function does not work in place (p_dst and p_src must not overlap). XXX Only 8, 16, 24, 32, 64 bits per sample are supported.

References ExtractChannel().

void aout_ChannelReorder	(	uint8_t *	p_buf,
		int	i_buffer,
		int	i_channels,
		const int *	pi_chan_table,
		int	i_bits_per_sample
	)

References AOUT_CHAN_MAX.

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 fonction 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.

It will also set :

• *pi_channels as the number of channels that will be extracted which is lower (in case of non understood channels type) or equal to i_channels.
• the layout of the channels (*pi_layout).

It will return true if channel extraction is really needed, in which case aout_ChannelExtract must be used

XXX It must be used when the source may have channel type not understood by VLC. In this case the channel type pi_order_src[] must be set to 0. XXX It must also be used if multiple channels have the same type.

References AOUT_CHAN_CENTER, AOUT_CHAN_RIGHT, and pi_vlc_chan_order_wg4.

int aout_CheckChannelReorder	(	const uint32_t *	pi_chan_order_in,
		const uint32_t *	pi_chan_order_out,
		uint32_t	i_channel_mask,
		int	i_channels,
		int *	pi_chan_table
	)

This function computes the reordering needed to go from pi_chan_order_in to pi_chan_order_out.

If pi_chan_order_in or pi_chan_order_out is NULL, it will assume that vlc internal (WG4) order is requested.

References AOUT_CHAN_MAX, and pi_vlc_chan_order_wg4.

void aout_Destroy

(

audio_output_t *

aout

)

References aout_owner(), aout_Shutdown(), aout_owner_t::module, and vlc_object_release.

Referenced by DestroyAout(), ReleaseAout(), and TerminateAout().

static void aout_Destructor

(

vlc_object_t *

p_this

)

[static]

References aout_owner(), aout_owner_t::lock, vlc_mutex_destroy(), and aout_owner_t::volume.

Referenced by aout_New().

void aout_FormatPrepare

(

audio_sample_format_t *

p_format

)

References aout_BitsPerSample(), aout_FormatNbChannels(), audio_format_t::i_bitspersample, audio_format_t::i_bytes_per_frame, audio_format_t::i_channels, audio_format_t::i_format, and audio_format_t::i_frame_length.

Referenced by aout_InputNew(), aout_new_buffer(), aout_OutputNew(), and SplitConversion().

void aout_FormatPrint	(	vlc_object_t *	obj,
		const char *	psz_text,
		const audio_sample_format_t *	p_format
	)

Prints an audio sample format in a human-readable form.

References aout_FormatPrintChannels(), audio_format_t::i_bytes_per_frame, audio_format_t::i_format, audio_format_t::i_frame_length, audio_format_t::i_rate, and msg_Dbg.

const char* aout_FormatPrintChannels

(

const audio_sample_format_t *

p_format

)

References AOUT_CHAN_CENTER, AOUT_CHAN_DOLBYSTEREO, AOUT_CHAN_DUALMONO, AOUT_CHAN_LEFT, AOUT_CHAN_LFE, AOUT_CHAN_MIDDLELEFT, AOUT_CHAN_MIDDLERIGHT, AOUT_CHAN_REARCENTER, AOUT_CHAN_REARLEFT, AOUT_CHAN_REARRIGHT, AOUT_CHAN_REVERSESTEREO, AOUT_CHAN_RIGHT, audio_format_t::i_original_channels, and audio_format_t::i_physical_channels.

Referenced by aout_FormatPrint(), aout_FormatsPrint(), and EsOutUpdateInfo().

void aout_FormatsPrint	(	vlc_object_t *	obj,
		const char *	psz_text,
		const audio_sample_format_t *	p_format1,
		const audio_sample_format_t *	p_format2
	)

Prints two formats in a human-readable form.

References aout_FormatPrintChannels(), audio_format_t::i_format, audio_format_t::i_rate, and msg_Dbg.

audio_output_t* aout_New

(

vlc_object_t *

p_parent

)

References _, aout_Destructor(), aout_owner(), aout_VolumeNoneInit(), config_FindConfig(), module_config_t::i_list, aout_owner_t::input, aout_owner_t::lock, aout_owner_t::mixer, aout_owner_t::module, module_exists(), aout_owner_t::multiplier, audio_output::pf_play, module_config_t::ppsz_list, module_config_t::ppsz_list_text, vlc_value_t::psz_string, text, unlikely, var_Change, var_Create, var_GetNonEmptyString, var_SetString, vlc_custom_create, vlc_mutex_init(), VLC_OBJECT, vlc_object_set_destructor, VLC_VAR_ADDCHOICE, VLC_VAR_DOINHERIT, VLC_VAR_HASCHOICE, VLC_VAR_SETTEXT, VLC_VAR_STRING, VLC_VAR_VOID, and aout_owner_t::volume.

static void ExtractChannel	(	uint8_t *	pi_dst,
		int	i_dst_channels,
		const uint8_t *	pi_src,
		int	i_src_channels,
		int	i_sample_count,
		const int *	pi_selection,
		int	i_bytes
	)			[inline, static]

Referenced by aout_ChannelExtract().

static int FilterOrder

(

const char *

psz_name

)

[static]

Referenced by aout_ChangeFilterString().