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 *****************************************************************************/
39 #include <vlc_common.h>
40 #include <vlc_codec.h>
42 #include <vlc_filter.h>
44 #include <vlc_image.h>
45 #include <vlc_stream.h>
50 static picture_t *ImageRead( image_handler_t *, block_t *,
51 video_format_t *, video_format_t * );
52 static picture_t *ImageReadUrl( image_handler_t *, const char *,
53 video_format_t *, video_format_t * );
54 static block_t *ImageWrite( image_handler_t *, picture_t *,
55 video_format_t *, video_format_t * );
56 static int ImageWriteUrl( image_handler_t *, picture_t *,
57 video_format_t *, video_format_t *, const char * );
59 static picture_t *ImageConvert( image_handler_t *, picture_t *,
60 video_format_t *, video_format_t * );
61 static picture_t *ImageFilter( image_handler_t *, picture_t *,
62 video_format_t *, const char *psz_module );
64 static decoder_t *CreateDecoder( vlc_object_t *, video_format_t * );
65 static void DeleteDecoder( decoder_t * );
66 static encoder_t *CreateEncoder( vlc_object_t *, video_format_t *,
68 static void DeleteEncoder( encoder_t * );
69 static filter_t *CreateFilter( vlc_object_t *, es_format_t *,
70 video_format_t *, const char * );
71 static void DeleteFilter( filter_t * );
73 vlc_fourcc_t image_Type2Fourcc( const char * );
74 vlc_fourcc_t image_Ext2Fourcc( const char * );
75 /*static const char *Fourcc2Ext( vlc_fourcc_t );*/
77 #undef image_HandlerCreate
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 = (int64_t)p_image->p_dec->fmt_out.video.i_width *
161 p_image->p_dec->fmt_out.video.i_sar_num *
162 p_fmt_out->i_height /
163 p_image->p_dec->fmt_out.video.i_height /
164 p_image->p_dec->fmt_out.video.i_sar_den;
166 if( !p_fmt_out->i_height && p_fmt_out->i_width )
167 p_fmt_out->i_height = (int64_t)p_image->p_dec->fmt_out.video.i_height *
168 p_image->p_dec->fmt_out.video.i_sar_den *
170 p_image->p_dec->fmt_out.video.i_width /
171 p_image->p_dec->fmt_out.video.i_sar_num;
172 if( !p_fmt_out->i_width )
173 p_fmt_out->i_width = p_image->p_dec->fmt_out.video.i_width;
174 if( !p_fmt_out->i_height )
175 p_fmt_out->i_height = p_image->p_dec->fmt_out.video.i_height;
177 /* Check if we need chroma conversion or resizing */
178 if( p_image->p_dec->fmt_out.video.i_chroma != p_fmt_out->i_chroma ||
179 p_image->p_dec->fmt_out.video.i_width != p_fmt_out->i_width ||
180 p_image->p_dec->fmt_out.video.i_height != p_fmt_out->i_height )
182 if( p_image->p_filter )
183 if( p_image->p_filter->fmt_in.video.i_chroma !=
184 p_image->p_dec->fmt_out.video.i_chroma ||
185 p_image->p_filter->fmt_out.video.i_chroma != p_fmt_out->i_chroma )
187 /* We need to restart a new filter */
188 DeleteFilter( p_image->p_filter );
189 p_image->p_filter = 0;
193 if( !p_image->p_filter )
196 CreateFilter( p_image->p_parent, &p_image->p_dec->fmt_out,
199 if( !p_image->p_filter )
201 picture_Release( p_pic );
207 /* Filters should handle on-the-fly size changes */
208 p_image->p_filter->fmt_in = p_image->p_dec->fmt_out;
209 p_image->p_filter->fmt_out = p_image->p_dec->fmt_out;
210 p_image->p_filter->fmt_out.i_codec = p_fmt_out->i_chroma;
211 p_image->p_filter->fmt_out.video = *p_fmt_out;
214 p_pic = p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
215 *p_fmt_out = p_image->p_filter->fmt_out.video;
217 else *p_fmt_out = p_image->p_dec->fmt_out.video;
222 static picture_t *ImageReadUrl( image_handler_t *p_image, const char *psz_url,
223 video_format_t *p_fmt_in,
224 video_format_t *p_fmt_out )
228 stream_t *p_stream = NULL;
231 p_stream = stream_UrlNew( p_image->p_parent, psz_url );
235 msg_Dbg( p_image->p_parent, "could not open %s for reading",
240 i_size = stream_Size( p_stream );
242 p_block = block_New( p_image->p_parent, i_size );
244 stream_Read( p_stream, p_block->p_buffer, i_size );
246 if( !p_fmt_in->i_chroma )
248 char *psz_mime = NULL;
249 stream_Control( p_stream, STREAM_GET_CONTENT_TYPE, &psz_mime );
251 p_fmt_in->i_chroma = image_Mime2Fourcc( psz_mime );
254 stream_Delete( p_stream );
256 if( !p_fmt_in->i_chroma )
258 /* Try to guess format from file name */
259 p_fmt_in->i_chroma = image_Ext2Fourcc( psz_url );
262 p_pic = ImageRead( p_image, p_block, p_fmt_in, p_fmt_out );
272 static block_t *ImageWrite( image_handler_t *p_image, picture_t *p_pic,
273 video_format_t *p_fmt_in,
274 video_format_t *p_fmt_out )
278 /* Check if we can reuse the current encoder */
279 if( p_image->p_enc &&
280 ( p_image->p_enc->fmt_out.i_codec != p_fmt_out->i_chroma ||
281 p_image->p_enc->fmt_out.video.i_width != p_fmt_out->i_width ||
282 p_image->p_enc->fmt_out.video.i_height != p_fmt_out->i_height ) )
284 DeleteEncoder( p_image->p_enc );
288 /* Start an encoder */
289 if( !p_image->p_enc )
291 p_image->p_enc = CreateEncoder( p_image->p_parent,
292 p_fmt_in, p_fmt_out );
293 if( !p_image->p_enc ) return NULL;
296 /* Check if we need chroma conversion or resizing */
297 if( p_image->p_enc->fmt_in.video.i_chroma != p_fmt_in->i_chroma ||
298 p_image->p_enc->fmt_in.video.i_width != p_fmt_in->i_width ||
299 p_image->p_enc->fmt_in.video.i_height != p_fmt_in->i_height )
301 picture_t *p_tmp_pic;
303 if( p_image->p_filter )
304 if( p_image->p_filter->fmt_in.video.i_chroma != p_fmt_in->i_chroma ||
305 p_image->p_filter->fmt_out.video.i_chroma !=
306 p_image->p_enc->fmt_in.video.i_chroma )
308 /* We need to restart a new filter */
309 DeleteFilter( p_image->p_filter );
310 p_image->p_filter = 0;
314 if( !p_image->p_filter )
317 es_format_Init( &fmt_in, VIDEO_ES, p_fmt_in->i_chroma );
318 fmt_in.video = *p_fmt_in;
321 CreateFilter( p_image->p_parent, &fmt_in,
322 &p_image->p_enc->fmt_in.video, NULL );
324 if( !p_image->p_filter )
331 /* Filters should handle on-the-fly size changes */
332 p_image->p_filter->fmt_in.i_codec = p_fmt_in->i_chroma;
333 p_image->p_filter->fmt_out.video = *p_fmt_in;
334 p_image->p_filter->fmt_out.i_codec =p_image->p_enc->fmt_in.i_codec;
335 p_image->p_filter->fmt_out.video = p_image->p_enc->fmt_in.video;
338 picture_Hold( p_pic );
341 p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
343 if( likely(p_tmp_pic != NULL) )
345 p_block = p_image->p_enc->pf_encode_video( p_image->p_enc,
347 p_image->p_filter->pf_video_buffer_del( p_image->p_filter,
355 p_block = p_image->p_enc->pf_encode_video( p_image->p_enc, p_pic );
360 msg_Dbg( p_image->p_parent, "no image encoded" );
367 static int ImageWriteUrl( image_handler_t *p_image, picture_t *p_pic,
368 video_format_t *p_fmt_in, video_format_t *p_fmt_out,
369 const char *psz_url )
374 if( !p_fmt_out->i_chroma )
376 /* Try to guess format from file name */
377 p_fmt_out->i_chroma = image_Ext2Fourcc( psz_url );
380 file = vlc_fopen( psz_url, "wb" );
383 msg_Err( p_image->p_parent, "%s: %m", psz_url );
387 p_block = ImageWrite( p_image, p_pic, p_fmt_in, p_fmt_out );
392 if( fwrite( p_block->p_buffer, p_block->i_buffer, 1, file ) != 1 )
394 block_Release( p_block );
397 if( fclose( file ) && !err )
403 msg_Err( p_image->p_parent, "%s: %m", psz_url );
406 return err ? VLC_EGENERIC : VLC_SUCCESS;
410 * Convert an image to a different format
414 static picture_t *ImageConvert( image_handler_t *p_image, picture_t *p_pic,
415 video_format_t *p_fmt_in,
416 video_format_t *p_fmt_out )
420 if( !p_fmt_out->i_width && !p_fmt_out->i_height &&
421 p_fmt_out->i_sar_num && p_fmt_out->i_sar_den &&
422 p_fmt_out->i_sar_num * p_fmt_in->i_sar_den !=
423 p_fmt_out->i_sar_den * p_fmt_in->i_sar_num )
426 p_fmt_in->i_sar_num * (int64_t)p_fmt_out->i_sar_den *
427 p_fmt_in->i_width / p_fmt_in->i_sar_den / p_fmt_out->i_sar_num;
428 p_fmt_out->i_visible_width =
429 p_fmt_in->i_sar_num * (int64_t)p_fmt_out->i_sar_den *
430 p_fmt_in->i_visible_width / p_fmt_in->i_sar_den /
431 p_fmt_out->i_sar_num;
434 if( !p_fmt_out->i_chroma ) p_fmt_out->i_chroma = p_fmt_in->i_chroma;
435 if( !p_fmt_out->i_width )
436 p_fmt_out->i_width = p_fmt_out->i_visible_width = p_fmt_in->i_width;
437 if( !p_fmt_out->i_height )
438 p_fmt_out->i_height = p_fmt_out->i_visible_height = p_fmt_in->i_height;
439 if( !p_fmt_out->i_sar_num ) p_fmt_out->i_sar_num = p_fmt_in->i_sar_num;
440 if( !p_fmt_out->i_sar_den ) p_fmt_out->i_sar_den = p_fmt_in->i_sar_den;
442 if( p_image->p_filter )
443 if( p_image->p_filter->fmt_in.video.i_chroma != p_fmt_in->i_chroma ||
444 p_image->p_filter->fmt_out.video.i_chroma != p_fmt_out->i_chroma )
446 /* We need to restart a new filter */
447 DeleteFilter( p_image->p_filter );
448 p_image->p_filter = NULL;
452 if( !p_image->p_filter )
455 es_format_Init( &fmt_in, VIDEO_ES, p_fmt_in->i_chroma );
456 fmt_in.video = *p_fmt_in;
459 CreateFilter( p_image->p_parent, &fmt_in, p_fmt_out, NULL );
461 if( !p_image->p_filter )
468 /* Filters should handle on-the-fly size changes */
469 p_image->p_filter->fmt_in.video = *p_fmt_in;
470 p_image->p_filter->fmt_out.video = *p_fmt_out;
473 picture_Hold( p_pic );
475 p_pif = p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
477 if( p_fmt_in->i_chroma == p_fmt_out->i_chroma &&
478 p_fmt_in->i_width == p_fmt_out->i_width &&
479 p_fmt_in->i_height == p_fmt_out->i_height )
481 /* Duplicate image */
482 picture_Release( p_pif ); /* XXX: Better fix must be possible */
483 p_pif = p_image->p_filter->pf_video_buffer_new( p_image->p_filter );
485 picture_Copy( p_pif, p_pic );
492 * Filter an image with a psz_module filter
496 static picture_t *ImageFilter( image_handler_t *p_image, picture_t *p_pic,
497 video_format_t *p_fmt, const char *psz_module )
500 if( !p_image->p_filter )
503 es_format_Init( &fmt, VIDEO_ES, p_fmt->i_chroma );
507 CreateFilter( p_image->p_parent, &fmt, &fmt.video, psz_module );
509 if( !p_image->p_filter )
516 /* Filters should handle on-the-fly size changes */
517 p_image->p_filter->fmt_in.video = *p_fmt;
518 p_image->p_filter->fmt_out.video = *p_fmt;
521 picture_Hold( p_pic );
523 return p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
532 vlc_fourcc_t i_codec;
537 { VLC_CODEC_JPEG, "jpeg" },
538 { VLC_CODEC_JPEG, "jpg" },
539 { VLC_CODEC_JPEGLS, "ljpg" },
540 { VLC_CODEC_PNG, "png" },
541 { VLC_CODEC_PGM, "pgm" },
542 { VLC_CODEC_PGMYUV, "pgmyuv" },
543 { VLC_FOURCC('p','b','m',' '), "pbm" },
544 { VLC_FOURCC('p','a','m',' '), "pam" },
545 { VLC_CODEC_TARGA, "tga" },
546 { VLC_CODEC_BMP, "bmp" },
547 { VLC_CODEC_PNM, "pnm" },
548 { VLC_FOURCC('x','p','m',' '), "xpm" },
549 { VLC_FOURCC('x','c','f',' '), "xcf" },
550 { VLC_CODEC_PCX, "pcx" },
551 { VLC_CODEC_GIF, "gif" },
552 { VLC_CODEC_TIFF, "tif" },
553 { VLC_CODEC_TIFF, "tiff" },
554 { VLC_FOURCC('l','b','m',' '), "lbm" },
555 { VLC_CODEC_PPM, "ppm" },
559 vlc_fourcc_t image_Type2Fourcc( const char *psz_type )
563 for( i = 0; ext_table[i].i_codec; i++ )
564 if( !strcasecmp( ext_table[i].psz_ext, psz_type ) )
565 return ext_table[i].i_codec;
570 vlc_fourcc_t image_Ext2Fourcc( const char *psz_name )
572 psz_name = strrchr( psz_name, '.' );
573 if( !psz_name ) return 0;
576 return image_Type2Fourcc( psz_name );
580 static const char *Fourcc2Ext( vlc_fourcc_t i_codec )
584 for( i = 0; ext_table[i].i_codec != 0; i++ )
586 if( ext_table[i].i_codec == i_codec ) return ext_table[i].psz_ext;
595 vlc_fourcc_t i_codec;
596 const char *psz_mime;
599 { VLC_CODEC_BMP, "image/bmp" },
600 { VLC_CODEC_BMP, "image/x-bmp" },
601 { VLC_CODEC_BMP, "image/x-bitmap" },
602 { VLC_CODEC_BMP, "image/x-ms-bmp" },
603 { VLC_CODEC_PNM, "image/x-portable-anymap" },
604 { VLC_CODEC_PNM, "image/x-portable-bitmap" },
605 { VLC_CODEC_PNM, "image/x-portable-graymap" },
606 { VLC_CODEC_PNM, "image/x-portable-pixmap" },
607 { VLC_CODEC_GIF, "image/gif" },
608 { VLC_CODEC_JPEG, "image/jpeg" },
609 { VLC_CODEC_PCX, "image/pcx" },
610 { VLC_CODEC_PNG, "image/png" },
611 { VLC_CODEC_TIFF, "image/tiff" },
612 { VLC_CODEC_TARGA, "iamge/x-tga" },
613 { VLC_FOURCC('x','p','m',' '), "image/x-xpixmap" },
617 vlc_fourcc_t image_Mime2Fourcc( const char *psz_mime )
620 for( i = 0; mime_table[i].i_codec; i++ )
621 if( !strcmp( psz_mime, mime_table[i].psz_mime ) )
622 return mime_table[i].i_codec;
627 static picture_t *video_new_buffer( decoder_t *p_dec )
629 p_dec->fmt_out.video.i_chroma = p_dec->fmt_out.i_codec;
630 return picture_NewFromFormat( &p_dec->fmt_out.video );
633 static void video_del_buffer( decoder_t *p_dec, picture_t *p_pic )
635 if( p_pic->i_refcount != 1 )
636 msg_Err( p_dec, "invalid picture reference count" );
638 p_pic->i_refcount = 0;
639 picture_Delete( p_pic );
642 static void video_link_picture( decoder_t *p_dec, picture_t *p_pic )
645 picture_Hold( p_pic );
648 static void video_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
651 picture_Release( p_pic );
654 static decoder_t *CreateDecoder( vlc_object_t *p_this, video_format_t *fmt )
658 p_dec = vlc_custom_create( p_this, sizeof( *p_dec ), VLC_OBJECT_GENERIC,
663 p_dec->p_module = NULL;
664 es_format_Init( &p_dec->fmt_in, VIDEO_ES, fmt->i_chroma );
665 es_format_Init( &p_dec->fmt_out, VIDEO_ES, 0 );
666 p_dec->fmt_in.video = *fmt;
667 p_dec->b_pace_control = true;
669 p_dec->pf_vout_buffer_new = video_new_buffer;
670 p_dec->pf_vout_buffer_del = video_del_buffer;
671 p_dec->pf_picture_link = video_link_picture;
672 p_dec->pf_picture_unlink = video_unlink_picture;
674 vlc_object_attach( p_dec, p_this );
676 /* Find a suitable decoder module */
677 p_dec->p_module = module_need( p_dec, "decoder", "$codec", false );
678 if( !p_dec->p_module )
680 msg_Err( p_dec, "no suitable decoder module for fourcc `%4.4s'. "
681 "VLC probably does not support this image format.",
682 (char*)&p_dec->fmt_in.i_codec );
684 DeleteDecoder( p_dec );
691 static void DeleteDecoder( decoder_t * p_dec )
693 if( p_dec->p_module ) module_unneed( p_dec, p_dec->p_module );
695 es_format_Clean( &p_dec->fmt_in );
696 es_format_Clean( &p_dec->fmt_out );
698 if( p_dec->p_description )
699 vlc_meta_Delete( p_dec->p_description );
701 vlc_object_release( p_dec );
705 static encoder_t *CreateEncoder( vlc_object_t *p_this, video_format_t *fmt_in,
706 video_format_t *fmt_out )
710 p_enc = sout_EncoderCreate( p_this );
714 p_enc->p_module = NULL;
715 es_format_Init( &p_enc->fmt_in, VIDEO_ES, fmt_in->i_chroma );
716 p_enc->fmt_in.video = *fmt_in;
717 if( fmt_out->i_width > 0 && fmt_out->i_height > 0 )
719 p_enc->fmt_in.video.i_width = fmt_out->i_width;
720 p_enc->fmt_in.video.i_height = fmt_out->i_height;
722 if( fmt_out->i_visible_width > 0 &&
723 fmt_out->i_visible_height > 0 )
725 p_enc->fmt_in.video.i_visible_width = fmt_out->i_visible_width;
726 p_enc->fmt_in.video.i_visible_height = fmt_out->i_visible_height;
730 p_enc->fmt_in.video.i_visible_width = fmt_out->i_width;
731 p_enc->fmt_in.video.i_visible_height = fmt_out->i_height;
734 else if( fmt_out->i_sar_num && fmt_out->i_sar_den &&
735 fmt_out->i_sar_num * fmt_in->i_sar_den !=
736 fmt_out->i_sar_den * fmt_in->i_sar_num )
738 p_enc->fmt_in.video.i_width =
739 fmt_in->i_sar_num * (int64_t)fmt_out->i_sar_den * fmt_in->i_width /
740 fmt_in->i_sar_den / fmt_out->i_sar_num;
741 p_enc->fmt_in.video.i_visible_width =
742 fmt_in->i_sar_num * (int64_t)fmt_out->i_sar_den *
743 fmt_in->i_visible_width / fmt_in->i_sar_den / fmt_out->i_sar_num;
746 p_enc->fmt_in.video.i_frame_rate = 25;
747 p_enc->fmt_in.video.i_frame_rate_base = 1;
749 es_format_Init( &p_enc->fmt_out, VIDEO_ES, fmt_out->i_chroma );
750 p_enc->fmt_out.video = *fmt_out;
751 p_enc->fmt_out.video.i_width = p_enc->fmt_in.video.i_width;
752 p_enc->fmt_out.video.i_height = p_enc->fmt_in.video.i_height;
754 vlc_object_attach( p_enc, p_this );
756 /* Find a suitable decoder module */
757 p_enc->p_module = module_need( p_enc, "encoder", NULL, false );
758 if( !p_enc->p_module )
760 msg_Err( p_enc, "no suitable encoder module for fourcc `%4.4s'.\n"
761 "VLC probably does not support this image format.",
762 (char*)&p_enc->fmt_out.i_codec );
764 DeleteEncoder( p_enc );
767 p_enc->fmt_in.video.i_chroma = p_enc->fmt_in.i_codec;
772 static void DeleteEncoder( encoder_t * p_enc )
774 if( p_enc->p_module ) module_unneed( p_enc, p_enc->p_module );
776 es_format_Clean( &p_enc->fmt_in );
777 es_format_Clean( &p_enc->fmt_out );
779 vlc_object_release( p_enc );
783 static filter_t *CreateFilter( vlc_object_t *p_this, es_format_t *p_fmt_in,
784 video_format_t *p_fmt_out,
785 const char *psz_module )
787 static const char typename[] = "filter";
790 p_filter = vlc_custom_create( p_this, sizeof(filter_t),
791 VLC_OBJECT_GENERIC, typename );
792 vlc_object_attach( p_filter, p_this );
794 p_filter->pf_video_buffer_new =
795 (picture_t *(*)(filter_t *))video_new_buffer;
796 p_filter->pf_video_buffer_del =
797 (void (*)(filter_t *, picture_t *))video_del_buffer;
799 p_filter->fmt_in = *p_fmt_in;
800 p_filter->fmt_out = *p_fmt_in;
801 p_filter->fmt_out.i_codec = p_fmt_out->i_chroma;
802 p_filter->fmt_out.video = *p_fmt_out;
803 p_filter->p_module = module_need( p_filter, "video filter2",
806 if( !p_filter->p_module )
808 msg_Dbg( p_filter, "no video filter found" );
809 DeleteFilter( p_filter );
816 static void DeleteFilter( filter_t * p_filter )
818 if( p_filter->p_module ) module_unneed( p_filter, p_filter->p_module );
820 es_format_Clean( &p_filter->fmt_in );
821 es_format_Clean( &p_filter->fmt_out );
823 vlc_object_release( p_filter );