1 /*****************************************************************************
2 * fake.c: decoder reading from a fake stream, outputting a fixed image
3 *****************************************************************************
4 * Copyright (C) 2005 the VideoLAN team
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
8 * Jean-Paul Saman <jpsaman at m2x dot nl>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <vlc_codec.h>
35 #include <vlc_image.h>
36 #include <vlc_filter.h>
37 #include <vlc_charset.h>
39 /*****************************************************************************
41 *****************************************************************************/
42 static int OpenDecoder ( vlc_object_t * );
43 static void CloseDecoder ( vlc_object_t * );
45 static picture_t *DecodeBlock ( decoder_t *, block_t ** );
46 static int FakeCallback( vlc_object_t *, char const *,
47 vlc_value_t, vlc_value_t, void * );
49 /*****************************************************************************
51 *****************************************************************************/
52 #define FILE_TEXT N_("Image file")
53 #define FILE_LONGTEXT N_( \
54 "Path of the image file for fake input." )
55 #define RELOAD_TEXT N_("Reload image file")
56 #define RELOAD_LONGTEXT N_( \
57 "Reload image file every n seconds." )
58 #define WIDTH_TEXT N_("Video width")
59 #define WIDTH_LONGTEXT N_( \
60 "Output video width." )
61 #define HEIGHT_TEXT N_("Video height")
62 #define HEIGHT_LONGTEXT N_( \
63 "Output video height." )
64 #define KEEP_AR_TEXT N_("Keep aspect ratio")
65 #define KEEP_AR_LONGTEXT N_( \
66 "Consider width and height as maximum values." )
67 #define ASPECT_RATIO_TEXT N_("Background aspect ratio")
68 #define ASPECT_RATIO_LONGTEXT N_( \
69 "Aspect ratio of the image file (4:3, 16:9). Default is square pixels." )
70 #define DEINTERLACE_TEXT N_("Deinterlace video")
71 #define DEINTERLACE_LONGTEXT N_( \
72 "Deinterlace the image after loading it." )
73 #define DEINTERLACE_MODULE_TEXT N_("Deinterlace module")
74 #define DEINTERLACE_MODULE_LONGTEXT N_( \
75 "Deinterlace module to use." )
76 #define CHROMA_TEXT N_("Chroma used.")
77 #define CHROMA_LONGTEXT N_( \
78 "Force use of a specific chroma for output. Default is I420." )
80 static const char *ppsz_deinterlace_type[] =
82 "deinterlace", "ffmpeg-deinterlace"
86 set_category( CAT_INPUT );
87 set_subcategory( SUBCAT_INPUT_VCODEC );
88 set_shortname( _("Fake") );
89 set_description( _("Fake video decoder") );
90 set_capability( "decoder", 1000 );
91 set_callbacks( OpenDecoder, CloseDecoder );
92 add_shortcut( "fake" );
94 add_file( "fake-file", "", NULL, FILE_TEXT,
95 FILE_LONGTEXT, VLC_FALSE );
96 add_integer( "fake-file-reload", 0, NULL, RELOAD_TEXT,
97 RELOAD_LONGTEXT, VLC_FALSE );
98 add_integer( "fake-width", 0, NULL, WIDTH_TEXT,
99 WIDTH_LONGTEXT, VLC_TRUE );
100 add_integer( "fake-height", 0, NULL, HEIGHT_TEXT,
101 HEIGHT_LONGTEXT, VLC_TRUE );
102 add_bool( "fake-keep-ar", 0, NULL, KEEP_AR_TEXT, KEEP_AR_LONGTEXT,
104 add_string( "fake-aspect-ratio", "", NULL,
105 ASPECT_RATIO_TEXT, ASPECT_RATIO_LONGTEXT, VLC_TRUE );
106 add_bool( "fake-deinterlace", 0, NULL, DEINTERLACE_TEXT,
107 DEINTERLACE_LONGTEXT, VLC_FALSE );
108 add_string( "fake-deinterlace-module", "deinterlace", NULL,
109 DEINTERLACE_MODULE_TEXT, DEINTERLACE_MODULE_LONGTEXT,
111 change_string_list( ppsz_deinterlace_type, 0, 0 );
112 add_string( "fake-chroma", "I420", NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
126 /*****************************************************************************
127 * OpenDecoder: probe the decoder and return score
128 *****************************************************************************/
129 static int OpenDecoder( vlc_object_t *p_this )
131 decoder_t *p_dec = (decoder_t*)p_this;
133 image_handler_t *p_handler;
134 video_format_t fmt_in, fmt_out;
136 char *psz_file, *psz_chroma;
137 vlc_bool_t b_keep_ar;
140 if( p_dec->fmt_in.i_codec != VLC_FOURCC('f','a','k','e') )
145 p_dec->p_sys = (decoder_sys_t *)malloc( sizeof( decoder_sys_t ) );
150 memset( p_dec->p_sys, 0, sizeof( decoder_sys_t ) );
152 psz_file = var_CreateGetNonEmptyStringCommand( p_dec, "fake-file" );
155 msg_Err( p_dec, "specify a file with --fake-file=..." );
158 var_AddCallback( p_dec, "fake-file", FakeCallback, p_dec );
160 memset( &fmt_in, 0, sizeof(fmt_in) );
161 memset( &fmt_out, 0, sizeof(fmt_out) );
163 val.i_int = var_CreateGetIntegerCommand( p_dec, "fake-file-reload" );
166 p_dec->p_sys->b_reload = VLC_TRUE;
167 p_dec->p_sys->i_reload = (mtime_t)(val.i_int * 1000000);
168 p_dec->p_sys->i_next = (mtime_t)(p_dec->p_sys->i_reload + mdate());
171 psz_chroma = var_CreateGetString( p_dec, "fake-chroma" );
172 if( strlen( psz_chroma ) != 4 )
174 msg_Warn( p_dec, "Invalid chroma (%s). Using I420.", psz_chroma );
175 fmt_out.i_chroma = VLC_FOURCC('I','4','2','0');
179 fmt_out.i_chroma = VLC_FOURCC( psz_chroma[0],
186 var_Create( p_dec, "fake-keep-ar", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
187 var_Get( p_dec, "fake-keep-ar", &val );
188 b_keep_ar = val.b_bool;
190 var_Create( p_dec, "fake-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
191 var_Create( p_dec, "fake-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
192 var_Create( p_dec, "fake-aspect-ratio",
193 VLC_VAR_STRING | VLC_VAR_DOINHERIT );
195 var_Get( p_dec, "fake-aspect-ratio", &val );
196 if ( val.psz_string )
198 char *psz_parser = strchr( val.psz_string, ':' );
202 *psz_parser++ = '\0';
203 i_aspect = atoi( val.psz_string )
204 * VOUT_ASPECT_FACTOR / atoi( psz_parser );
206 free( val.psz_string );
211 var_Get( p_dec, "fake-width", &val );
212 fmt_out.i_width = val.i_int;
213 var_Get( p_dec, "fake-height", &val );
214 fmt_out.i_height = val.i_int;
217 p_handler = image_HandlerCreate( p_dec );
218 p_image = image_ReadUrl( p_handler, psz_file, &fmt_in, &fmt_out );
219 image_HandlerDelete( p_handler );
221 if ( p_image == NULL )
223 msg_Err( p_dec, "unable to read image file %s", psz_file );
226 msg_Dbg( p_dec, "file %s loaded successfully", psz_file );
232 picture_t *p_old = p_image;
233 int i_width, i_height;
235 var_Get( p_dec, "fake-width", &val );
237 var_Get( p_dec, "fake-height", &val );
238 i_height = val.i_int;
240 if ( i_width && i_height )
242 int i_image_ar = fmt_out.i_width * VOUT_ASPECT_FACTOR
244 int i_region_ar = i_width * VOUT_ASPECT_FACTOR / i_height;
247 if ( i_aspect == i_image_ar )
249 fmt_out.i_width = i_width;
250 fmt_out.i_height = i_height;
252 else if ( i_image_ar > i_region_ar )
254 fmt_out.i_width = i_width;
255 fmt_out.i_height = i_width * VOUT_ASPECT_FACTOR
257 i_aspect = i_image_ar;
261 fmt_out.i_height = i_height;
262 fmt_out.i_width = i_height * i_image_ar
263 / VOUT_ASPECT_FACTOR;
264 i_aspect = i_image_ar;
267 p_handler = image_HandlerCreate( p_dec );
268 p_image = image_Convert( p_handler, p_old, &fmt_in, &fmt_out );
269 image_HandlerDelete( p_handler );
271 if ( p_image == NULL )
273 msg_Warn( p_dec, "couldn't load resizing module" );
279 p_old->pf_release( p_old );
286 fmt_out.i_aspect = i_aspect;
290 fmt_out.i_aspect = fmt_out.i_width
291 * VOUT_ASPECT_FACTOR / fmt_out.i_height;
294 var_Create( p_dec, "fake-deinterlace", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
295 var_Get( p_dec, "fake-deinterlace", &val );
298 picture_t *p_old = p_image;
300 var_Create( p_dec, "fake-deinterlace-module",
301 VLC_VAR_STRING | VLC_VAR_DOINHERIT );
302 var_Get( p_dec, "fake-deinterlace-module", &val );
304 p_handler = image_HandlerCreate( p_dec );
305 p_image = image_Filter( p_handler, p_old, &fmt_out, val.psz_string );
306 image_HandlerDelete( p_handler );
307 free( val.psz_string );
309 if ( p_image == NULL )
311 msg_Warn( p_dec, "couldn't load deinterlace module" );
316 p_old->pf_release( p_old );
320 /* Set output properties */
321 p_dec->fmt_out.i_cat = VIDEO_ES;
322 p_dec->fmt_out.i_codec = fmt_out.i_chroma;
323 p_dec->fmt_out.video = fmt_out;
326 p_dec->pf_decode_video = DecodeBlock;
328 p_dec->p_sys->p_image = p_image;
329 vlc_mutex_init( p_dec, &p_dec->p_sys->lock );
334 /****************************************************************************
335 * DecodeBlock: the whole thing
336 ****************************************************************************/
337 static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
339 decoder_sys_t *p_sys = (decoder_sys_t*) p_dec->p_sys;
342 if( pp_block == NULL || !*pp_block ) return NULL;
343 p_pic = p_dec->pf_vout_buffer_new( p_dec );
346 msg_Err( p_dec, "cannot get picture" );
350 if( p_sys->b_reload && (mdate() >= p_sys->i_next) )
352 var_TriggerCallback( p_dec, "fake-file" );
354 p_sys->i_next = (mtime_t)(p_sys->i_reload + mdate());
356 vlc_mutex_lock( &p_dec->p_sys->lock );
357 vout_CopyPicture( p_dec, p_pic, p_dec->p_sys->p_image );
358 vlc_mutex_unlock( &p_dec->p_sys->lock );
360 p_pic->date = (*pp_block)->i_pts;
363 block_Release( *pp_block );
369 /*****************************************************************************
370 * CloseDecoder: fake decoder destruction
371 *****************************************************************************/
372 static void CloseDecoder( vlc_object_t *p_this )
374 decoder_t *p_dec = (decoder_t *)p_this;
375 picture_t *p_image = p_dec->p_sys->p_image;
377 if( p_image != NULL )
378 p_image->pf_release( p_image );
380 vlc_mutex_destroy( &p_dec->p_sys->lock );
381 free( p_dec->p_sys );
384 /*****************************************************************************
385 * FakeCallback: Image source change callback.
386 *****************************************************************************/
387 static int FakeCallback( vlc_object_t *p_this, char const *psz_var,
388 vlc_value_t oldval, vlc_value_t newval,
391 VLC_UNUSED(p_this); VLC_UNUSED(oldval);
392 decoder_t *p_dec = (decoder_t *)p_data;
394 if( !strcmp( psz_var, "fake-file" ) )
396 image_handler_t *p_handler;
397 picture_t *p_new_image;
398 video_format_t fmt_in, fmt_out;
399 char *psz_file = newval.psz_string;
402 vlc_mutex_lock( &p_dec->p_sys->lock );
403 p_image = p_dec->p_sys->p_image;
405 if( !psz_file || !*psz_file )
407 msg_Err( p_dec, "fake-file value must be non empty." );
408 vlc_mutex_unlock( &p_dec->p_sys->lock );
411 msg_Dbg( p_dec, "Changing fake-file to %s.", psz_file );
413 memset( &fmt_in, 0, sizeof(fmt_in) );
414 fmt_out = p_dec->fmt_out.video;
415 p_handler = image_HandlerCreate( p_dec );
416 p_new_image = image_ReadUrl( p_handler, psz_file, &fmt_in, &fmt_out );
417 image_HandlerDelete( p_handler );
421 msg_Err( p_dec, "error while reading image (%s)", psz_file );
422 vlc_mutex_unlock( &p_dec->p_sys->lock );
426 p_dec->p_sys->p_image = p_new_image;
427 p_image->pf_release( p_image );
428 vlc_mutex_unlock( &p_dec->p_sys->lock );
430 else if( !strcmp( psz_var, "fake-file-reload" ) )
432 if( newval.i_int > 0)
434 p_dec->p_sys->b_reload = VLC_TRUE;
435 p_dec->p_sys->i_reload = (mtime_t)(newval.i_int * 1000000);
436 p_dec->p_sys->i_next = (mtime_t)(p_dec->p_sys->i_reload + mdate());
440 p_dec->p_sys->b_reload = VLC_FALSE;