X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=include%2Fvlc_filter.h;h=6dbb2f117ca115564918b3e12b8c530aa7516617;hb=c5c06b64c806052086e5772d64e540a8db7e4a9b;hp=761d8e5b08b206b514b09829703498f6fc117446;hpb=9d44913e8c1fb85db71b862ee9c657a5571b17f1;p=vlc diff --git a/include/vlc_filter.h b/include/vlc_filter.h index 761d8e5b08..6dbb2f117c 100644 --- a/include/vlc_filter.h +++ b/include/vlc_filter.h @@ -1,10 +1,11 @@ /***************************************************************************** - * vlc_filter.h: filter related structures + * vlc_filter.h: filter related structures and functions ***************************************************************************** - * Copyright (C) 1999-2003 VideoLAN + * Copyright (C) 1999-2008 the VideoLAN team * $Id$ * * Authors: Gildas Bazin + * Antoine Cellerier * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -18,10 +19,15 @@ * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ -#ifndef _VLC_FILTER_H -#define _VLC_FILTER_H 1 + +#ifndef VLC_FILTER_H +#define VLC_FILTER_H 1 + +#include +#include +#include /** * \file @@ -30,12 +36,10 @@ typedef struct filter_owner_sys_t filter_owner_sys_t; -/** - * \defgroup filter Filter - * - * The structure describing a filter - * - * @{ +/** Structure describing a filter + * @warning BIG FAT WARNING : the code relies on the first 4 members of + * filter_t and decoder_t to be the same, so if you have anything to add, + * do it at the end of the structure. */ struct filter_t { @@ -50,18 +54,22 @@ struct filter_t /* Output format of filter */ es_format_t fmt_out; + bool b_allow_fmt_out_change; /* Filter configuration */ - sout_cfg_t * p_cfg; + config_chain_t * p_cfg; picture_t * ( * pf_video_filter ) ( filter_t *, picture_t * ); block_t * ( * pf_audio_filter ) ( filter_t *, block_t * ); - void ( * pf_video_blend ) ( filter_t *, picture_t *, + void ( * pf_video_blend ) ( filter_t *, picture_t *, picture_t *, int, int, int ); subpicture_t * ( *pf_sub_filter ) ( filter_t *, mtime_t ); - int ( *pf_render_text ) ( filter_t *, subpicture_region_t *, subpicture_region_t * ); + int ( *pf_render_text ) ( filter_t *, subpicture_region_t *, + subpicture_region_t * ); + int ( *pf_render_html ) ( filter_t *, subpicture_region_t *, + subpicture_region_t * ); /* * Buffers allocation @@ -73,8 +81,8 @@ struct filter_t /* Video output callbacks */ picture_t * ( * pf_vout_buffer_new) ( filter_t * ); void ( * pf_vout_buffer_del) ( filter_t *, picture_t * ); - void ( * pf_picture_link) ( filter_t *, picture_t * ); - void ( * pf_picture_unlink) ( filter_t *, picture_t * ); + /* void ( * pf_picture_link) ( picture_t * ); + void ( * pf_picture_unlink) ( picture_t * ); */ /* SPU output callbacks */ subpicture_t * ( * pf_sub_buffer_new) ( filter_t * ); @@ -85,7 +93,224 @@ struct filter_t }; /** - * @} + * This function will return a new picture usable by p_filter as an output + * buffer. You have to release it using filter_DeletePicture or by returning + * it to the caller as a pf_video_filter return value. + * Provided for convenience. + * + * \param p_filter filter_t object + * \return new picture on success or NULL on failure + */ +static inline picture_t *filter_NewPicture( filter_t *p_filter ) +{ + picture_t *p_picture = p_filter->pf_vout_buffer_new( p_filter ); + if( !p_picture ) + msg_Warn( p_filter, "can't get output picture" ); + return p_picture; +} + +/** + * This function will release a picture create by filter_NewPicture. + * Provided for convenience. + * + * \param p_filter filter_t object + * \param p_picture picture to be deleted + */ +static inline void filter_DeletePicture( filter_t *p_filter, picture_t *p_picture ) +{ + p_filter->pf_vout_buffer_del( p_filter, p_picture ); +} + +/** + * This function will return a new subpicture usable by p_filter as an output + * buffer. You have to release it using filter_DeleteSubpicture or by returning + * it to the caller as a pf_sub_filter return value. + * Provided for convenience. + * + * \param p_filter filter_t object + * \return new subpicture + */ +static inline subpicture_t *filter_NewSubpicture( filter_t *p_filter ) +{ + subpicture_t *p_subpicture = p_filter->pf_sub_buffer_new( p_filter ); + if( !p_subpicture ) + msg_Warn( p_filter, "can't get output subpicture" ); + return p_subpicture; +} + +/** + * This function will release a subpicture create by filter_NewSubicture. + * Provided for convenience. + * + * \param p_filter filter_t object + * \param p_subpicture to be released + */ +static inline void filter_DeleteSubpicture( filter_t *p_filter, subpicture_t *p_subpicture ) +{ + p_filter->pf_sub_buffer_del( p_filter, p_subpicture ); +} + +/** + * This function will return a new audio buffer usable by p_filter as an + * output buffer. You have to release it using block_Release or by returning + * it to the caller as a pf_audio_filter return value. + * Provided for convenience. + * + * \param p_filter filter_t object + * \param i_size size of audio buffer requested + * \return block to be used as audio output buffer + */ +static inline block_t *filter_NewAudioBuffer( filter_t *p_filter, int i_size ) +{ + block_t *p_block = p_filter->pf_audio_buffer_new( p_filter, i_size ); + if( !p_block ) + msg_Warn( p_filter, "can't get output block" ); + return p_block; +} + +/** + * Create a picture_t *(*)( filter_t *, picture_t * ) compatible wrapper + * using a void (*)( filter_t *, picture_t *, picture_t * ) function + * + * Currently used by the chroma video filters + */ +#define VIDEO_FILTER_WRAPPER( name ) \ + static picture_t *name ## _Filter ( filter_t *p_filter, \ + picture_t *p_pic ) \ + { \ + picture_t *p_outpic = filter_NewPicture( p_filter ); \ + if( p_outpic ) \ + { \ + name( p_filter, p_pic, p_outpic ); \ + picture_CopyProperties( p_outpic, p_pic ); \ + } \ + picture_Release( p_pic ); \ + return p_outpic; \ + } + +/** + * Filter chain management API + * The filter chain management API is used to dynamically construct filters + * and add them in a chain. + */ + +typedef struct filter_chain_t filter_chain_t; + +/** + * Create new filter chain + * + * \param p_object pointer to a vlc object + * \param psz_capability vlc capability of filters in filter chain + * \param b_allow_format_fmt_change allow changing of fmt + * \param pf_buffer_allocation_init callback function to initialize buffer allocations + * \param pf_buffer_allocation_clear callback function to clear buffer allocation initialization + * \param p_buffer_allocation_data pointer to private allocation data + * \return pointer to a filter chain + */ +VLC_EXPORT( filter_chain_t *, __filter_chain_New, ( vlc_object_t *, const char *, bool, int (*)( filter_t *, void * ), void (*)( filter_t * ), void * ) ); +#define filter_chain_New( a, b, c, d, e, f ) __filter_chain_New( VLC_OBJECT( a ), b, c, d, e, f ) + +/** + * Delete filter chain will delete all filters in the chain and free all + * allocated data. The pointer to the filter chain is then no longer valid. + * + * \param p_chain pointer to filter chain + */ +VLC_EXPORT( void, filter_chain_Delete, ( filter_chain_t * ) ); + +/** + * Reset filter chain will delete all filters in the chain and + * reset p_fmt_in and p_fmt_out to the new values. + * + * \param p_chain pointer to filter chain + * \param p_fmt_in new fmt_in params + * \param p_fmt_out new fmt_out params + */ +VLC_EXPORT( void, filter_chain_Reset, ( filter_chain_t *, const es_format_t *, const es_format_t * ) ); + +/** + * Append filter to the end of the chain. + * + * \param p_chain pointer to filter chain + * \param psz_name name of filter + * \param p_cfg + * \param p_fmt_in input es_format_t + * \param p_fmt_out output es_format_t + * \return pointer to filter chain + */ +VLC_EXPORT( filter_t *, filter_chain_AppendFilter, ( filter_chain_t *, const char *, config_chain_t *, const es_format_t *, const es_format_t * ) ); + +/** + * Append new filter to filter chain from string. + * + * \param p_chain pointer to filter chain + * \param psz_string string of filters + * \return 0 for success + */ +VLC_EXPORT( int, filter_chain_AppendFromString, ( filter_chain_t *, const char * ) ); + +/** + * Delete filter from filter chain. This function also releases the filter + * object and unloads the filter modules. The pointer to p_filter is no + * longer valid after this function successfully returns. + * + * \param p_chain pointer to filter chain + * \param p_filter pointer to filter object + * \return VLC_SUCCESS on succes, else VLC_EGENERIC + */ +VLC_EXPORT( int, filter_chain_DeleteFilter, ( filter_chain_t *, filter_t * ) ); + +/** + * Get filter by name of position in the filter chain. + * + * \param p_chain pointer to filter chain + * \param i_position position of filter in filter chain + * \param psz_name name of filter to get + * \return filter object based on position or name provided */ +VLC_EXPORT( filter_t *, filter_chain_GetFilter, ( filter_chain_t *, int, const char * ) ); + +/** + * Get the number of filters in the filter chain. + * + * \param p_chain pointer to filter chain + * \return number of filters in this filter chain + */ +VLC_EXPORT( int, filter_chain_GetLength, ( filter_chain_t * ) ); + +/** + * Get last p_fmt_out in the chain. + * + * \param p_chain pointer to filter chain + * \return last p_fmt (es_format_t) of this filter chain + */ +VLC_EXPORT( const es_format_t *, filter_chain_GetFmtOut, ( filter_chain_t * ) ); + +/** + * Apply the filter chain to a video picture. + * + * \param p_chain pointer to filter chain + * \param p_picture picture to apply filters on + * \return modified picture after applying all video filters + */ +VLC_EXPORT( picture_t *, filter_chain_VideoFilter, ( filter_chain_t *, picture_t * ) ); + +/** + * Apply the filter chain to a audio block. + * + * \param p_chain pointer to filter chain + * \param p_block audio frame to apply filters on + * \return modified audio frame after applying all audio filters + */ +VLC_EXPORT( block_t *, filter_chain_AudioFilter, ( filter_chain_t *, block_t * ) ); + +/** + * Apply filter chain to subpictures. + * + * \param p_chain pointer to filter chain + * \param display_date of subpictures + */ +VLC_EXPORT( void, filter_chain_SubFilter, ( filter_chain_t *, mtime_t ) ); #endif /* _VLC_FILTER_H */ +