Sub-picture channels

Collaboration diagram for Sub-picture channels:

Modules
	On-screen display

Files
file	vlc_spu.h

Data Structures
struct	spu_t
	Subpicture unit descriptor. More...

Macros
#define	spu_Create(a, b)   spu_Create(VLC_OBJECT(a),b)

Typedefs
typedef struct spu_private_t	spu_private_t

Functions
spu_t *	spu_Create (vlc_object_t *, vout_thread_t *)
	Creates the subpicture unit.
void	spu_Destroy (spu_t *)
	Destroy the subpicture unit.
void	spu_PutSubpicture (spu_t *, subpicture_t *)
	This function sends a subpicture to the spu_t core.
struct vlc_render_subpicture *	spu_Render (spu_t *spu, const vlc_fourcc_t *p_chroma_list, const video_format_t *p_fmt_dst, const video_format_t *p_fmt_src, bool spu_in_full_window, const struct vout_display_place_t *video_position, vlc_tick_t system_now, vlc_tick_t pts, bool ignore_osd)
	This function will return an unique subpicture containing the OSD and subtitles visible at the requested date.
ssize_t	spu_RegisterChannel (spu_t *)
	It registers a new SPU channel.
void	spu_UnregisterChannel (spu_t *, size_t)
void	spu_ClearChannel (spu_t *, size_t)
	It clears all subpictures associated to a SPU channel.
void	spu_ChangeSources (spu_t *, const char *)
	It changes the sub sources list.
void	spu_ChangeFilters (spu_t *, const char *)
	It changes the sub filters list.

Detailed Description

Macro Definition Documentation

spu_Create

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

Typedef Documentation

spu_private_t

typedef struct spu_private_t spu_private_t

Function Documentation

spu_ChangeFilters()

void spu_ChangeFilters	(	spu_t *	spu,
		const char *	filters
	)

It changes the sub filters list.

References spu_private_t::filter_chain_current, spu_private_t::filter_chain_update, spu_private_t::lock, spu_t::p, strdup(), vlc_mutex_lock(), and vlc_mutex_unlock().

Referenced by vout_ControlChangeSubFilters().

spu_ChangeSources()

void spu_ChangeSources	(	spu_t *	spu,
		const char *	filters
	)

It changes the sub sources list.

References spu_private_t::lock, spu_t::p, spu_private_t::source_chain_current, spu_private_t::source_chain_update, strdup(), vlc_mutex_lock(), and vlc_mutex_unlock().

Referenced by vout_ControlChangeSubSources().

spu_ClearChannel()

void spu_ClearChannel	(	spu_t *	spu,
		size_t	channel_id
	)

It clears all subpictures associated to a SPU channel.

References spu_channel::clock, spu_channel::delay, spu_private_t::lock, spu_t::p, spu_channel_Clean(), spu_GetChannel(), vlc_clock_Lock(), vlc_clock_Reset(), vlc_clock_SetDelay(), vlc_clock_Unlock(), vlc_mutex_lock(), and vlc_mutex_unlock().

Referenced by spu_PutSubpicture(), SubSourceClean(), and vout_FlushSubpictureChannel().

spu_Create()

spu_t * spu_Create	(	vlc_object_t *	object,
		vout_thread_t *	vout
	)

Creates the subpicture unit.

Parameters

object	the parent object which creates the subpicture unit
vout	the video output that will use the spu_t instance

References spu_private_t::channels, spu_private_t::chroma_list, spu_private_t::cond, spu_private_t::filter_chain, spu_private_t::filter_chain_lock, filter_chain_NewSPU, spu_private_t::filter_chain_update, spu_private_t::fmtdst, spu_private_t::fmtsrc, spu_private_t::last_sort_date, spu_private_t::live, spu_private_t::lock, spu_private_t::margin, spu_private_t::output_cond, spu_t::p, spu_private_t::p_processed, spu_private_t::prerender, spu_private_t::scale, spu_private_t::scale_yuvp, spu_private_t::secondary_alignment, spu_private_t::secondary_margin, spu_private_t::source_chain, spu_private_t::source_chain_update, spu_channel_Init(), SPU_CHROMALIST_COUNT, spu_Cleanup(), spu_PrerenderThread(), SpuRenderCreateAndLoadScale(), SpuRenderCreateAndLoadText(), spu_private_t::subs_pos, spu_private_t::text, spu_private_t::textlock, spu_private_t::thread, var_InheritInteger(), spu_private_t::vector, video_format_Init(), vlc_clone(), VLC_CODEC_RGBA, VLC_CODEC_YUVA, VLC_CODEC_YUVP, vlc_cond_init(), vlc_custom_create, vlc_mutex_init(), VLC_OBJECT, vlc_object_delete, vlc_vector_init, vlc_vector_push, vlc_vector_reserve, VLC_VOUT_ORDER_PRIMARY, spu_private_t::vout, and VOUT_SPU_CHANNEL_OSD_COUNT.

spu_Destroy()

void spu_Destroy

(

spu_t *

spu

)

Destroy the subpicture unit.

Parameters

spu	a subpicture unit created with spu_Create

References spu_private_t::cond, spu_private_t::live, spu_private_t::lock, spu_t::p, spu_private_t::prerender, spu_Cleanup(), spu_private_t::thread, vlc_cond_signal(), vlc_join(), vlc_mutex_lock(), vlc_mutex_unlock(), and vlc_object_delete.

Referenced by vout_Close(), and vout_Create().

spu_PutSubpicture()

void spu_PutSubpicture	(	spu_t *	spu,
		subpicture_t *	subpic
	)

This function sends a subpicture to the spu_t core.

You cannot use the provided subpicture anymore. The spu_t core will destroy it at its convenience.

This function sends a subpicture to the spu_t core.

Remove the reservation flag of a subpicture, which will cause it to be ready for display.

Parameters

spu	the subpicture unit object
subpic	the subpicture to display

References subpicture_t::b_ephemer, spu_channel::clock, spu_private_t::filter_chain, filter_chain_AppendFromString(), filter_chain_Clear(), filter_chain_ForEach(), filter_chain_IsEmpty(), spu_private_t::filter_chain_lock, spu_private_t::filter_chain_update, subpicture_t::i_channel, subpicture_t::i_start, subpicture_t::i_stop, spu_private_t::lock, msg_Err, spu_t::p, subpicture_region_t::p_private, spu_channel::rate, subpicture_t::regions, spu_private_t::source_chain_current, spu_private_t::source_chain_update, spu_channel_EarlyRemoveLate(), spu_channel_Push(), spu_ClearChannel(), spu_GetChannel(), spu_HasAlreadyExpired(), spu_PrerenderEnqueue(), strdup(), SubFilter(), SubFilterAddProxyCallbacks(), SubFilterDelProxyCallbacks(), subpicture_Delete(), vlc_clock_ConvertToSystem(), vlc_clock_Lock(), vlc_clock_Unlock(), vlc_mutex_lock(), vlc_mutex_unlock(), vlc_spu_regions_foreach, VLC_TICK_INVALID, vlc_tick_now(), spu_private_t::vout, and VOUT_SPU_CHANNEL_OSD.

Referenced by SubSourceGenerate(), and vout_PutSubpicture().

spu_RegisterChannel()

ssize_t spu_RegisterChannel

(

spu_t *

spu

)

It registers a new SPU channel.

References spu_RegisterChannelInternal().

Referenced by SubSourceInit(), and vout_RegisterSubpictureChannel().

spu_Render()

struct vlc_render_subpicture * spu_Render	(	spu_t *	spu,
		const vlc_fourcc_t *	p_chroma_list,
		const video_format_t *	p_fmt_dst,
		const video_format_t *	p_fmt_src,
		bool	spu_in_full_window,
		const struct vout_display_place_t *	video_position,
		vlc_tick_t	system_now,
		vlc_tick_t	pts,
		bool	ignore_osd
	)

This function will return an unique subpicture containing the OSD and subtitles visible at the requested date.

Parameters

spu	the subpicture unit instance
p_chroma_list	is a list of supported chroma for the output (can be NULL)
p_fmt_dst	is the format of the picture on which the return subpicture will be rendered.
p_fmt_src	is the format of the original(source) video.
video_position	position of the video inside the display or NULL to fit in p_fmt_dst
system_now	the reference current time
pts	the timestamp of the rendered frame
ignore_osd	whether we display the OSD or not

The returned value if non NULL must be released by subpicture_Delete().

spu_UnregisterChannel()

void spu_UnregisterChannel	(	spu_t *	spu,
		size_t	channel_id
	)

References spu_private_t::channels, spu_private_t::lock, spu_t::p, spu_channel_Clean(), spu_GetChannel(), vlc_mutex_lock(), vlc_mutex_unlock(), and vlc_vector_remove.

Referenced by vout_UnregisterSubpictureChannel().