1 /*****************************************************************************
2 * image.c : wrapper for image reading/writing facilities
3 *****************************************************************************
4 * Copyright (C) 2004-2007 the VideoLAN team
7 * Author: Gildas Bazin <gbazin@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
26 * This file contains the functions to handle the image_handler_t type
29 /*****************************************************************************
31 *****************************************************************************/
40 #include <vlc_common.h>
41 #include <vlc_codec.h>
43 #include <vlc_filter.h>
45 #include <vlc_image.h>
46 #include <vlc_stream.h>
47 #include <vlc_charset.h>
51 static picture_t *ImageRead( image_handler_t *, block_t *,
52 video_format_t *, video_format_t * );
53 static picture_t *ImageReadUrl( image_handler_t *, const char *,
54 video_format_t *, video_format_t * );
55 static block_t *ImageWrite( image_handler_t *, picture_t *,
56 video_format_t *, video_format_t * );
57 static int ImageWriteUrl( image_handler_t *, picture_t *,
58 video_format_t *, video_format_t *, const char * );
60 static picture_t *ImageConvert( image_handler_t *, picture_t *,
61 video_format_t *, video_format_t * );
62 static picture_t *ImageFilter( image_handler_t *, picture_t *,
63 video_format_t *, const char *psz_module );
65 static decoder_t *CreateDecoder( vlc_object_t *, video_format_t * );
66 static void DeleteDecoder( decoder_t * );
67 static encoder_t *CreateEncoder( vlc_object_t *, video_format_t *,
69 static void DeleteEncoder( encoder_t * );
70 static filter_t *CreateFilter( vlc_object_t *, es_format_t *,
71 video_format_t *, const char * );
72 static void DeleteFilter( filter_t * );
74 vlc_fourcc_t image_Type2Fourcc( const char * );
75 vlc_fourcc_t image_Ext2Fourcc( const char * );
76 /*static const char *Fourcc2Ext( vlc_fourcc_t );*/
79 * Create an image_handler_t instance
82 image_handler_t *__image_HandlerCreate( vlc_object_t *p_this )
84 image_handler_t *p_image = calloc( 1, sizeof(image_handler_t) );
88 p_image->p_parent = p_this;
90 p_image->pf_read = ImageRead;
91 p_image->pf_read_url = ImageReadUrl;
92 p_image->pf_write = ImageWrite;
93 p_image->pf_write_url = ImageWriteUrl;
94 p_image->pf_convert = ImageConvert;
95 p_image->pf_filter = ImageFilter;
101 * Delete the image_handler_t instance
104 void image_HandlerDelete( image_handler_t *p_image )
106 if( !p_image ) return;
108 if( p_image->p_dec ) DeleteDecoder( p_image->p_dec );
109 if( p_image->p_enc ) DeleteEncoder( p_image->p_enc );
110 if( p_image->p_filter ) DeleteFilter( p_image->p_filter );
121 static picture_t *ImageRead( image_handler_t *p_image, block_t *p_block,
122 video_format_t *p_fmt_in,
123 video_format_t *p_fmt_out )
125 picture_t *p_pic = NULL, *p_tmp;
127 /* Check if we can reuse the current decoder */
128 if( p_image->p_dec &&
129 p_image->p_dec->fmt_in.i_codec != p_fmt_in->i_chroma )
131 DeleteDecoder( p_image->p_dec );
135 /* Start a decoder */
136 if( !p_image->p_dec )
138 p_image->p_dec = CreateDecoder( p_image->p_parent, p_fmt_in );
139 if( !p_image->p_dec ) return NULL;
142 p_block->i_pts = p_block->i_dts = mdate();
143 while( (p_tmp = p_image->p_dec->pf_decode_video( p_image->p_dec, &p_block ))
147 picture_Release( p_pic );
153 msg_Warn( p_image->p_parent, "no image decoded" );
157 if( !p_fmt_out->i_chroma )
158 p_fmt_out->i_chroma = p_image->p_dec->fmt_out.video.i_chroma;
159 if( !p_fmt_out->i_width && p_fmt_out->i_height )
160 p_fmt_out->i_width = p_fmt_out->i_height
161 * p_image->p_dec->fmt_out.video.i_aspect
162 / VOUT_ASPECT_FACTOR;
163 if( !p_fmt_out->i_height && p_fmt_out->i_width )
164 p_fmt_out->i_height = p_fmt_out->i_width * VOUT_ASPECT_FACTOR
165 / p_image->p_dec->fmt_out.video.i_aspect;
166 if( !p_fmt_out->i_width )
167 p_fmt_out->i_width = p_image->p_dec->fmt_out.video.i_width;
168 if( !p_fmt_out->i_height )
169 p_fmt_out->i_height = p_image->p_dec->fmt_out.video.i_height;
171 /* Check if we need chroma conversion or resizing */
172 if( p_image->p_dec->fmt_out.video.i_chroma != p_fmt_out->i_chroma ||
173 p_image->p_dec->fmt_out.video.i_width != p_fmt_out->i_width ||
174 p_image->p_dec->fmt_out.video.i_height != p_fmt_out->i_height )
176 if( p_image->p_filter )
177 if( p_image->p_filter->fmt_in.video.i_chroma !=
178 p_image->p_dec->fmt_out.video.i_chroma ||
179 p_image->p_filter->fmt_out.video.i_chroma != p_fmt_out->i_chroma )
181 /* We need to restart a new filter */
182 DeleteFilter( p_image->p_filter );
183 p_image->p_filter = 0;
187 if( !p_image->p_filter )
190 CreateFilter( p_image->p_parent, &p_image->p_dec->fmt_out,
193 if( !p_image->p_filter )
195 picture_Release( p_pic );
201 /* Filters should handle on-the-fly size changes */
202 p_image->p_filter->fmt_in = p_image->p_dec->fmt_out;
203 p_image->p_filter->fmt_out = p_image->p_dec->fmt_out;
204 p_image->p_filter->fmt_out.i_codec = p_fmt_out->i_chroma;
205 p_image->p_filter->fmt_out.video = *p_fmt_out;
208 p_pic = p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
209 *p_fmt_out = p_image->p_filter->fmt_out.video;
211 else *p_fmt_out = p_image->p_dec->fmt_out.video;
216 static picture_t *ImageReadUrl( image_handler_t *p_image, const char *psz_url,
217 video_format_t *p_fmt_in,
218 video_format_t *p_fmt_out )
222 stream_t *p_stream = NULL;
225 p_stream = stream_UrlNew( p_image->p_parent, psz_url );
229 msg_Dbg( p_image->p_parent, "could not open %s for reading",
234 i_size = stream_Size( p_stream );
236 p_block = block_New( p_image->p_parent, i_size );
238 stream_Read( p_stream, p_block->p_buffer, i_size );
240 if( !p_fmt_in->i_chroma )
242 char *psz_mime = NULL;
243 stream_Control( p_stream, STREAM_GET_CONTENT_TYPE, &psz_mime );
245 p_fmt_in->i_chroma = image_Mime2Fourcc( psz_mime );
248 stream_Delete( p_stream );
250 if( !p_fmt_in->i_chroma )
252 /* Try to guess format from file name */
253 p_fmt_in->i_chroma = image_Ext2Fourcc( psz_url );
256 p_pic = ImageRead( p_image, p_block, p_fmt_in, p_fmt_out );
266 static block_t *ImageWrite( image_handler_t *p_image, picture_t *p_pic,
267 video_format_t *p_fmt_in,
268 video_format_t *p_fmt_out )
272 /* Check if we can reuse the current encoder */
273 if( p_image->p_enc &&
274 ( p_image->p_enc->fmt_out.i_codec != p_fmt_out->i_chroma ||
275 p_image->p_enc->fmt_out.video.i_width != p_fmt_out->i_width ||
276 p_image->p_enc->fmt_out.video.i_height != p_fmt_out->i_height ) )
278 DeleteEncoder( p_image->p_enc );
282 /* Start an encoder */
283 if( !p_image->p_enc )
285 p_image->p_enc = CreateEncoder( p_image->p_parent,
286 p_fmt_in, p_fmt_out );
287 if( !p_image->p_enc ) return NULL;
290 /* Check if we need chroma conversion or resizing */
291 if( p_image->p_enc->fmt_in.video.i_chroma != p_fmt_in->i_chroma ||
292 p_image->p_enc->fmt_in.video.i_width != p_fmt_in->i_width ||
293 p_image->p_enc->fmt_in.video.i_height != p_fmt_in->i_height )
295 picture_t *p_tmp_pic;
297 if( p_image->p_filter )
298 if( p_image->p_filter->fmt_in.video.i_chroma != p_fmt_in->i_chroma ||
299 p_image->p_filter->fmt_out.video.i_chroma !=
300 p_image->p_enc->fmt_in.video.i_chroma )
302 /* We need to restart a new filter */
303 DeleteFilter( p_image->p_filter );
304 p_image->p_filter = 0;
308 if( !p_image->p_filter )
311 es_format_Init( &fmt_in, VIDEO_ES, p_fmt_in->i_chroma );
312 fmt_in.video = *p_fmt_in;
315 CreateFilter( p_image->p_parent, &fmt_in,
316 &p_image->p_enc->fmt_in.video, NULL );
318 if( !p_image->p_filter )
325 /* Filters should handle on-the-fly size changes */
326 p_image->p_filter->fmt_in.i_codec = p_fmt_in->i_chroma;
327 p_image->p_filter->fmt_out.video = *p_fmt_in;
328 p_image->p_filter->fmt_out.i_codec =p_image->p_enc->fmt_in.i_codec;
329 p_image->p_filter->fmt_out.video = p_image->p_enc->fmt_in.video;
332 picture_Hold( p_pic );
335 p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
337 p_block = p_image->p_enc->pf_encode_video( p_image->p_enc, p_tmp_pic );
339 p_image->p_filter->pf_vout_buffer_del( p_image->p_filter, p_tmp_pic );
343 p_block = p_image->p_enc->pf_encode_video( p_image->p_enc, p_pic );
348 msg_Dbg( p_image->p_parent, "no image encoded" );
355 static int ImageWriteUrl( image_handler_t *p_image, picture_t *p_pic,
356 video_format_t *p_fmt_in, video_format_t *p_fmt_out,
357 const char *psz_url )
362 if( !p_fmt_out->i_chroma )
364 /* Try to guess format from file name */
365 p_fmt_out->i_chroma = image_Ext2Fourcc( psz_url );
368 file = utf8_fopen( psz_url, "wb" );
371 msg_Err( p_image->p_parent, "%s: %m", psz_url );
375 p_block = ImageWrite( p_image, p_pic, p_fmt_in, p_fmt_out );
380 if( fwrite( p_block->p_buffer, p_block->i_buffer, 1, file ) != 1 )
382 block_Release( p_block );
385 if( fclose( file ) && !err )
391 msg_Err( p_image->p_parent, "%s: %m", psz_url );
394 return err ? VLC_EGENERIC : VLC_SUCCESS;
398 * Convert an image to a different format
402 static picture_t *ImageConvert( image_handler_t *p_image, picture_t *p_pic,
403 video_format_t *p_fmt_in,
404 video_format_t *p_fmt_out )
408 if( !p_fmt_out->i_width && !p_fmt_out->i_height &&
409 p_fmt_out->i_sar_num && p_fmt_out->i_sar_den &&
410 p_fmt_out->i_sar_num * p_fmt_in->i_sar_den !=
411 p_fmt_out->i_sar_den * p_fmt_in->i_sar_num )
414 p_fmt_in->i_sar_num * (int64_t)p_fmt_out->i_sar_den *
415 p_fmt_in->i_width / p_fmt_in->i_sar_den / p_fmt_out->i_sar_num;
416 p_fmt_out->i_visible_width =
417 p_fmt_in->i_sar_num * (int64_t)p_fmt_out->i_sar_den *
418 p_fmt_in->i_visible_width / p_fmt_in->i_sar_den /
419 p_fmt_out->i_sar_num;
422 if( !p_fmt_out->i_chroma ) p_fmt_out->i_chroma = p_fmt_in->i_chroma;
423 if( !p_fmt_out->i_width )
424 p_fmt_out->i_width = p_fmt_out->i_visible_width = p_fmt_in->i_width;
425 if( !p_fmt_out->i_height )
426 p_fmt_out->i_height = p_fmt_out->i_visible_height = p_fmt_in->i_height;
427 if( !p_fmt_out->i_sar_num ) p_fmt_out->i_sar_num = p_fmt_in->i_sar_num;
428 if( !p_fmt_out->i_sar_den ) p_fmt_out->i_sar_den = p_fmt_in->i_sar_den;
429 if( !p_fmt_out->i_aspect ) p_fmt_out->i_aspect = p_fmt_in->i_aspect;
431 if( p_image->p_filter )
432 if( p_image->p_filter->fmt_in.video.i_chroma != p_fmt_in->i_chroma ||
433 p_image->p_filter->fmt_out.video.i_chroma != p_fmt_out->i_chroma )
435 /* We need to restart a new filter */
436 DeleteFilter( p_image->p_filter );
437 p_image->p_filter = NULL;
441 if( !p_image->p_filter )
444 es_format_Init( &fmt_in, VIDEO_ES, p_fmt_in->i_chroma );
445 fmt_in.video = *p_fmt_in;
448 CreateFilter( p_image->p_parent, &fmt_in, p_fmt_out, NULL );
450 if( !p_image->p_filter )
457 /* Filters should handle on-the-fly size changes */
458 p_image->p_filter->fmt_in.video = *p_fmt_in;
459 p_image->p_filter->fmt_out.video = *p_fmt_out;
462 picture_Hold( p_pic );
464 p_pif = p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
466 if( p_fmt_in->i_chroma == p_fmt_out->i_chroma &&
467 p_fmt_in->i_width == p_fmt_out->i_width &&
468 p_fmt_in->i_height == p_fmt_out->i_height )
470 /* Duplicate image */
471 picture_Release( p_pif ); /* XXX: Better fix must be possible */
472 p_pif = p_image->p_filter->pf_vout_buffer_new( p_image->p_filter );
474 picture_Copy( p_pif, p_pic );
481 * Filter an image with a psz_module filter
485 static picture_t *ImageFilter( image_handler_t *p_image, picture_t *p_pic,
486 video_format_t *p_fmt, const char *psz_module )
489 if( !p_image->p_filter )
492 es_format_Init( &fmt, VIDEO_ES, p_fmt->i_chroma );
496 CreateFilter( p_image->p_parent, &fmt, &fmt.video, psz_module );
498 if( !p_image->p_filter )
505 /* Filters should handle on-the-fly size changes */
506 p_image->p_filter->fmt_in.video = *p_fmt;
507 p_image->p_filter->fmt_out.video = *p_fmt;
510 picture_Hold( p_pic );
512 return p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
521 vlc_fourcc_t i_codec;
526 { VLC_FOURCC('j','p','e','g'), "jpeg" },
527 { VLC_FOURCC('j','p','e','g'), "jpg" },
528 { VLC_FOURCC('l','j','p','g'), "ljpg" },
529 { VLC_FOURCC('p','n','g',' '), "png" },
530 { VLC_FOURCC('p','g','m',' '), "pgm" },
531 { VLC_FOURCC('p','g','m','y'), "pgmyuv" },
532 { VLC_FOURCC('p','b','m',' '), "pbm" },
533 { VLC_FOURCC('p','a','m',' '), "pam" },
534 { VLC_FOURCC('t','g','a',' '), "tga" },
535 { VLC_FOURCC('b','m','p',' '), "bmp" },
536 { VLC_FOURCC('p','n','m',' '), "pnm" },
537 { VLC_FOURCC('x','p','m',' '), "xpm" },
538 { VLC_FOURCC('x','c','f',' '), "xcf" },
539 { VLC_FOURCC('p','c','x',' '), "pcx" },
540 { VLC_FOURCC('g','i','f',' '), "gif" },
541 { VLC_FOURCC('t','i','f','f'), "tif" },
542 { VLC_FOURCC('t','i','f','f'), "tiff" },
543 { VLC_FOURCC('l','b','m',' '), "lbm" },
547 vlc_fourcc_t image_Type2Fourcc( const char *psz_type )
551 for( i = 0; ext_table[i].i_codec; i++ )
554 for( j = 0; toupper(ext_table[i].psz_ext[j]) == toupper(psz_type[j]);
557 if( !ext_table[i].psz_ext[j] && !psz_type[j] )
558 return ext_table[i].i_codec;
565 vlc_fourcc_t image_Ext2Fourcc( const char *psz_name )
567 psz_name = strrchr( psz_name, '.' );
568 if( !psz_name ) return 0;
571 return image_Type2Fourcc( psz_name );
575 static const char *Fourcc2Ext( vlc_fourcc_t i_codec )
579 for( i = 0; ext_table[i].i_codec != 0; i++ )
581 if( ext_table[i].i_codec == i_codec ) return ext_table[i].psz_ext;
590 vlc_fourcc_t i_codec;
591 const char *psz_mime;
594 { VLC_FOURCC('b','m','p',' '), "image/bmp" },
595 { VLC_FOURCC('b','m','p',' '), "image/x-bmp" },
596 { VLC_FOURCC('b','m','p',' '), "image/x-bitmap" },
597 { VLC_FOURCC('b','m','p',' '), "image/x-ms-bmp" },
598 { VLC_FOURCC('p','n','m',' '), "image/x-portable-anymap" },
599 { VLC_FOURCC('p','n','m',' '), "image/x-portable-bitmap" },
600 { VLC_FOURCC('p','n','m',' '), "image/x-portable-graymap" },
601 { VLC_FOURCC('p','n','m',' '), "image/x-portable-pixmap" },
602 { VLC_FOURCC('g','i','f',' '), "image/gif" },
603 { VLC_FOURCC('j','p','e','g'), "image/jpeg" },
604 { VLC_FOURCC('p','c','x',' '), "image/pcx" },
605 { VLC_FOURCC('p','n','g',' '), "image/png" },
606 { VLC_FOURCC('t','i','f','f'), "image/tiff" },
607 { VLC_FOURCC('t','g','a',' '), "iamge/x-tga" },
608 { VLC_FOURCC('x','p','m',' '), "image/x-xpixmap" },
612 vlc_fourcc_t image_Mime2Fourcc( const char *psz_mime )
615 for( i = 0; mime_table[i].i_codec; i++ )
616 if( !strcmp( psz_mime, mime_table[i].psz_mime ) )
617 return mime_table[i].i_codec;
622 static picture_t *video_new_buffer( decoder_t *p_dec )
624 p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
625 return picture_New( p_dec->fmt_out.video.i_chroma,
626 p_dec->fmt_out.video.i_width,
627 p_dec->fmt_out.video.i_height,
628 p_dec->fmt_out.video.i_aspect );
631 static void video_del_buffer( decoder_t *p_dec, picture_t *p_pic )
633 if( p_pic->i_refcount != 1 )
634 msg_Err( p_dec, "invalid picture reference count" );
636 p_pic->i_refcount = 0;
637 picture_Delete( p_pic );
640 static void video_link_picture( decoder_t *p_dec, picture_t *p_pic )
643 picture_Hold( p_pic );
646 static void video_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
649 picture_Release( p_pic );
652 static decoder_t *CreateDecoder( vlc_object_t *p_this, video_format_t *fmt )
656 p_dec = vlc_object_create( p_this, VLC_OBJECT_DECODER );
660 p_dec->p_module = NULL;
661 es_format_Init( &p_dec->fmt_in, VIDEO_ES, fmt->i_chroma );
662 es_format_Init( &p_dec->fmt_out, VIDEO_ES, 0 );
663 p_dec->fmt_in.video = *fmt;
664 p_dec->b_pace_control = true;
666 p_dec->pf_vout_buffer_new = video_new_buffer;
667 p_dec->pf_vout_buffer_del = video_del_buffer;
668 p_dec->pf_picture_link = video_link_picture;
669 p_dec->pf_picture_unlink = video_unlink_picture;
671 vlc_object_attach( p_dec, p_this );
673 /* Find a suitable decoder module */
674 p_dec->p_module = module_need( p_dec, "decoder", "$codec", false );
675 if( !p_dec->p_module )
677 msg_Err( p_dec, "no suitable decoder module for fourcc `%4.4s'.\n"
678 "VLC probably does not support this image format.",
679 (char*)&p_dec->fmt_in.i_codec );
681 DeleteDecoder( p_dec );
688 static void DeleteDecoder( decoder_t * p_dec )
690 vlc_object_detach( p_dec );
692 if( p_dec->p_module ) module_unneed( p_dec, p_dec->p_module );
694 es_format_Clean( &p_dec->fmt_in );
695 es_format_Clean( &p_dec->fmt_out );
697 if( p_dec->p_description )
698 vlc_meta_Delete( p_dec->p_description );
700 vlc_object_release( p_dec );
704 static encoder_t *CreateEncoder( vlc_object_t *p_this, video_format_t *fmt_in,
705 video_format_t *fmt_out )
709 p_enc = sout_EncoderCreate( p_this );
713 p_enc->p_module = NULL;
714 es_format_Init( &p_enc->fmt_in, VIDEO_ES, fmt_in->i_chroma );
715 p_enc->fmt_in.video = *fmt_in;
716 if( fmt_out->i_width > 0 && fmt_out->i_height > 0 )
718 p_enc->fmt_in.video.i_width = fmt_out->i_width;
719 p_enc->fmt_in.video.i_height = fmt_out->i_height;
721 if( fmt_out->i_visible_width > 0 &&
722 fmt_out->i_visible_height > 0 )
724 p_enc->fmt_in.video.i_visible_width = fmt_out->i_visible_width;
725 p_enc->fmt_in.video.i_visible_height = fmt_out->i_visible_height;
729 p_enc->fmt_in.video.i_visible_width = fmt_out->i_width;
730 p_enc->fmt_in.video.i_visible_height = fmt_out->i_height;
733 else if( fmt_out->i_sar_num && fmt_out->i_sar_den &&
734 fmt_out->i_sar_num * fmt_in->i_sar_den !=
735 fmt_out->i_sar_den * fmt_in->i_sar_num )
737 p_enc->fmt_in.video.i_width =
738 fmt_in->i_sar_num * (int64_t)fmt_out->i_sar_den * fmt_in->i_width /
739 fmt_in->i_sar_den / fmt_out->i_sar_num;
740 p_enc->fmt_in.video.i_visible_width =
741 fmt_in->i_sar_num * (int64_t)fmt_out->i_sar_den *
742 fmt_in->i_visible_width / fmt_in->i_sar_den / fmt_out->i_sar_num;
745 p_enc->fmt_in.video.i_frame_rate = 25;
746 p_enc->fmt_in.video.i_frame_rate_base = 1;
748 es_format_Init( &p_enc->fmt_out, VIDEO_ES, fmt_out->i_chroma );
749 p_enc->fmt_out.video = *fmt_out;
750 p_enc->fmt_out.video.i_width = p_enc->fmt_in.video.i_width;
751 p_enc->fmt_out.video.i_height = p_enc->fmt_in.video.i_height;
753 vlc_object_attach( p_enc, p_this );
755 /* Find a suitable decoder module */
756 p_enc->p_module = module_need( p_enc, "encoder", NULL, false );
757 if( !p_enc->p_module )
759 msg_Err( p_enc, "no suitable encoder module for fourcc `%4.4s'.\n"
760 "VLC probably does not support this image format.",
761 (char*)&p_enc->fmt_out.i_codec );
763 DeleteEncoder( p_enc );
766 p_enc->fmt_in.video.i_chroma = p_enc->fmt_in.i_codec;
771 static void DeleteEncoder( encoder_t * p_enc )
773 vlc_object_detach( p_enc );
775 if( p_enc->p_module ) module_unneed( p_enc, p_enc->p_module );
777 es_format_Clean( &p_enc->fmt_in );
778 es_format_Clean( &p_enc->fmt_out );
780 vlc_object_release( p_enc );
784 static filter_t *CreateFilter( vlc_object_t *p_this, es_format_t *p_fmt_in,
785 video_format_t *p_fmt_out,
786 const char *psz_module )
788 static const char typename[] = "filter";
791 p_filter = vlc_custom_create( p_this, sizeof(filter_t),
792 VLC_OBJECT_GENERIC, typename );
793 vlc_object_attach( p_filter, p_this );
795 p_filter->pf_vout_buffer_new =
796 (picture_t *(*)(filter_t *))video_new_buffer;
797 p_filter->pf_vout_buffer_del =
798 (void (*)(filter_t *, picture_t *))video_del_buffer;
800 p_filter->fmt_in = *p_fmt_in;
801 p_filter->fmt_out = *p_fmt_in;
802 p_filter->fmt_out.i_codec = p_fmt_out->i_chroma;
803 p_filter->fmt_out.video = *p_fmt_out;
804 p_filter->p_module = module_need( p_filter, "video filter2",
807 if( !p_filter->p_module )
809 msg_Dbg( p_filter, "no video filter found" );
810 DeleteFilter( p_filter );
817 static void DeleteFilter( filter_t * p_filter )
819 vlc_object_detach( p_filter );
821 if( p_filter->p_module ) module_unneed( p_filter, p_filter->p_module );
823 es_format_Clean( &p_filter->fmt_in );
824 es_format_Clean( &p_filter->fmt_out );
826 vlc_object_release( p_filter );