1 /*****************************************************************************
2 * invmem_decoder.c: memory video driver for vlc
3 *****************************************************************************
4 * Copyright (C) 2008 the VideoLAN team
7 * Authors: Robert Paciorek <robert@opcode.eu.org> <http://opcode.eu.org/bercik>
9 * - vmem video output module (Gildas Bazin <gbazin@videolan.org>)
10 * - png video decodec module (Sam Hocevar <sam@zoy.org>)
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
27 /*****************************************************************************
29 *****************************************************************************/
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
37 #include <vlc_codec.h>
39 #include <vlc_image.h>
40 #include <vlc_filter.h>
42 /*****************************************************************************
44 *****************************************************************************/
45 static int OpenDecoder ( vlc_object_t * );
46 static void CloseDecoder ( vlc_object_t * );
48 static picture_t *DecodeBlock ( decoder_t *, block_t ** );
50 /*****************************************************************************
52 *****************************************************************************/
53 #define T_WIDTH N_( "Width" )
54 #define LT_WIDTH N_( "Video memory buffer width." )
56 #define T_HEIGHT N_( "Height" )
57 #define LT_HEIGHT N_( "Video memory buffer height." )
59 #define T_LOCK N_( "Lock function" )
60 #define LT_LOCK N_( "Address of the locking callback function. This " \
61 "function must return a valid memory address for use " \
62 "by the video renderer." )
64 #define T_UNLOCK N_( "Unlock function" )
65 #define LT_UNLOCK N_( "Address of the unlocking callback function" )
67 #define T_DATA N_( "Callback data" )
68 #define LT_DATA N_( "Data for the locking and unlocking functions" )
70 #define INVMEM_HELP N_( "This module make possible making video stream from raw-image " \
71 "generating (to memory) from rendering program uses libvlc. " \
72 "To use this module from libvlc set --codec to invmem, "\
73 "set all --invmem-* options in vlc_argv an use " \
74 "libvlc_media_new(libvlc, \"fake://\", &ex);. " \
75 "Besides is simillar to vmem video output module." )
77 set_category( CAT_INPUT )
78 set_subcategory( SUBCAT_INPUT_VCODEC )
79 set_shortname( N_("Memory video decoder") )
80 set_description( N_("Memory video decoder") )
81 set_help( INVMEM_HELP )
82 set_capability( "decoder", 50 )
83 set_callbacks( OpenDecoder, CloseDecoder )
84 add_shortcut( "invmem" )
86 add_integer( "invmem-width", "0", NULL, T_WIDTH, LT_WIDTH, false )
87 add_integer( "invmem-height", "0", NULL, T_HEIGHT, LT_HEIGHT, false )
88 add_string( "invmem-lock", "0", NULL, T_LOCK, LT_LOCK, true )
89 add_string( "invmem-unlock", "0", NULL, T_UNLOCK, LT_UNLOCK, true )
90 add_string( "invmem-data", "0", NULL, T_DATA, LT_DATA, true )
96 void * (*pf_lock) (void *);
97 void (*pf_unlock) (void *);
108 /*****************************************************************************
109 * OpenDecoder: probe the decoder and return score
110 *****************************************************************************/
111 static int OpenDecoder( vlc_object_t *p_this )
113 decoder_t *p_dec = (decoder_t*)p_this;
114 decoder_sys_t *p_sys;
117 if( p_dec->fmt_in.i_codec != VLC_FOURCC('f','a','k','e'))
122 /* Allocate the memory needed to store the decoder's structure */
123 if( ( p_dec->p_sys = p_sys =
124 (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
128 p_sys->i_width = var_CreateGetInteger( p_this, "invmem-width" );
129 p_sys->i_height = var_CreateGetInteger( p_this, "invmem-height" );
130 if (p_sys->i_width == 0 || p_sys->i_height == 0) {
131 msg_Err( p_dec, "--vmem-width and --vmem-height must be > 0" );
135 psz_tmp = var_CreateGetString( p_dec, "invmem-lock" );
136 p_sys->pf_lock = (void * (*) (void *))(intptr_t)atoll( psz_tmp );
139 psz_tmp = var_CreateGetString( p_dec, "invmem-unlock" );
140 p_sys->pf_unlock = (void (*) (void *))(intptr_t)atoll( psz_tmp );
143 psz_tmp = var_CreateGetString( p_dec, "invmem-data" );
144 p_sys->p_data = (void *)(intptr_t)atoll( psz_tmp );
147 if( !p_sys->pf_lock || !p_sys->pf_unlock )
149 msg_Err( p_dec, "Invalid lock or unlock callbacks" );
153 /* Set output properties */
154 //p_dec->fmt_out.i_codec = VLC_FOURCC('R','G','B','A');
155 p_dec->fmt_out.i_codec = VLC_FOURCC('R','V','2','4');
156 p_dec->fmt_out.video.i_width = p_dec->p_sys->i_width;
157 p_dec->fmt_out.video.i_height = p_dec->p_sys->i_height;
158 p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR * p_dec->p_sys->i_width / p_dec->p_sys->i_height;
159 p_dec->fmt_out.video.i_rmask = 0xff0000;
160 p_dec->fmt_out.video.i_gmask = 0x00ff00;
161 p_dec->fmt_out.video.i_bmask = 0x0000ff;
162 p_dec->fmt_out.i_cat = VIDEO_ES;
164 p_sys->i_pitch = p_sys->i_width*3 + p_sys->i_width%4;
169 p_dec->pf_decode_video = DecodeBlock;
174 /****************************************************************************
175 * DecodeBlock: the whole thing
176 ****************************************************************************
177 * This function must be fed with a complete compressed frame.
178 ****************************************************************************/
179 static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
181 decoder_sys_t *p_sys = p_dec->p_sys;
184 if( !pp_block || !*pp_block ) return NULL;
188 // create new picture
189 if( p_sys->p_pic != NULL )
190 picture_Release( p_sys->p_pic );
191 p_sys->p_pic = decoder_NewPicture( p_dec );
192 p_sys->p_pic = p_dec->pf_vout_buffer_new( p_dec );
193 p_sys->p_pic->b_force = true;
194 p_sys->p_pic->p->i_pitch = p_dec->p_sys->i_pitch;
195 p_sys->p_pic->date = p_block->i_pts > 0 ? p_block->i_pts : p_block->i_dts;
197 // lock input and copy to picture
198 p_sys->p_pic->p->p_pixels = p_sys->pf_lock( p_dec->p_sys->p_data );
201 p_sys->pf_unlock( p_dec->p_sys->p_data );
203 block_Release( *pp_block ); *pp_block = NULL;
207 /*****************************************************************************
208 * CloseDecoder: invmem decoder destruction
209 *****************************************************************************/
210 static void CloseDecoder( vlc_object_t *p_this )
212 decoder_t *p_dec = (decoder_t *)p_this;
213 decoder_sys_t *p_sys = p_dec->p_sys;
215 if( p_sys->p_pic != NULL )
216 picture_Release( p_sys->p_pic );