1 /*****************************************************************************
2 * image.c : wrapper for image reading/writing facilities
3 *****************************************************************************
4 * Copyright (C) 2004-2007 VLC authors and VideoLAN
7 * Author: Gildas Bazin <gbazin@videolan.org>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * 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>
49 #include <vlc_modules.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 );*/
78 #undef image_HandlerCreate
80 * Create an image_handler_t instance
83 image_handler_t *image_HandlerCreate( vlc_object_t *p_this )
85 image_handler_t *p_image = calloc( 1, sizeof(image_handler_t) );
89 p_image->p_parent = p_this;
91 p_image->pf_read = ImageRead;
92 p_image->pf_read_url = ImageReadUrl;
93 p_image->pf_write = ImageWrite;
94 p_image->pf_write_url = ImageWriteUrl;
95 p_image->pf_convert = ImageConvert;
96 p_image->pf_filter = ImageFilter;
102 * Delete the image_handler_t instance
105 void image_HandlerDelete( image_handler_t *p_image )
107 if( !p_image ) return;
109 if( p_image->p_dec ) DeleteDecoder( p_image->p_dec );
110 if( p_image->p_enc ) DeleteEncoder( p_image->p_enc );
111 if( p_image->p_filter ) DeleteFilter( p_image->p_filter );
122 static picture_t *ImageRead( image_handler_t *p_image, block_t *p_block,
123 video_format_t *p_fmt_in,
124 video_format_t *p_fmt_out )
126 picture_t *p_pic = NULL, *p_tmp;
128 /* Check if we can reuse the current decoder */
129 if( p_image->p_dec &&
130 p_image->p_dec->fmt_in.i_codec != p_fmt_in->i_chroma )
132 DeleteDecoder( p_image->p_dec );
136 /* Start a decoder */
137 if( !p_image->p_dec )
139 p_image->p_dec = CreateDecoder( p_image->p_parent, p_fmt_in );
140 if( !p_image->p_dec ) return NULL;
143 p_block->i_pts = p_block->i_dts = mdate();
144 while( (p_tmp = p_image->p_dec->pf_decode_video( p_image->p_dec, &p_block ))
148 picture_Release( p_pic );
154 msg_Warn( p_image->p_parent, "no image decoded" );
158 if( !p_fmt_out->i_chroma )
159 p_fmt_out->i_chroma = p_image->p_dec->fmt_out.video.i_chroma;
160 if( !p_fmt_out->i_width && p_fmt_out->i_height )
161 p_fmt_out->i_width = (int64_t)p_image->p_dec->fmt_out.video.i_width *
162 p_image->p_dec->fmt_out.video.i_sar_num *
163 p_fmt_out->i_height /
164 p_image->p_dec->fmt_out.video.i_height /
165 p_image->p_dec->fmt_out.video.i_sar_den;
167 if( !p_fmt_out->i_height && p_fmt_out->i_width )
168 p_fmt_out->i_height = (int64_t)p_image->p_dec->fmt_out.video.i_height *
169 p_image->p_dec->fmt_out.video.i_sar_den *
171 p_image->p_dec->fmt_out.video.i_width /
172 p_image->p_dec->fmt_out.video.i_sar_num;
173 if( !p_fmt_out->i_width )
174 p_fmt_out->i_width = p_image->p_dec->fmt_out.video.i_width;
175 if( !p_fmt_out->i_height )
176 p_fmt_out->i_height = p_image->p_dec->fmt_out.video.i_height;
178 /* Check if we need chroma conversion or resizing */
179 if( p_image->p_dec->fmt_out.video.i_chroma != p_fmt_out->i_chroma ||
180 p_image->p_dec->fmt_out.video.i_width != p_fmt_out->i_width ||
181 p_image->p_dec->fmt_out.video.i_height != p_fmt_out->i_height )
183 if( p_image->p_filter )
184 if( p_image->p_filter->fmt_in.video.i_chroma !=
185 p_image->p_dec->fmt_out.video.i_chroma ||
186 p_image->p_filter->fmt_out.video.i_chroma != p_fmt_out->i_chroma )
188 /* We need to restart a new filter */
189 DeleteFilter( p_image->p_filter );
190 p_image->p_filter = 0;
194 if( !p_image->p_filter )
197 CreateFilter( p_image->p_parent, &p_image->p_dec->fmt_out,
200 if( !p_image->p_filter )
202 picture_Release( p_pic );
208 /* Filters should handle on-the-fly size changes */
209 p_image->p_filter->fmt_in = p_image->p_dec->fmt_out;
210 p_image->p_filter->fmt_out = p_image->p_dec->fmt_out;
211 p_image->p_filter->fmt_out.i_codec = p_fmt_out->i_chroma;
212 p_image->p_filter->fmt_out.video = *p_fmt_out;
215 p_pic = p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
216 *p_fmt_out = p_image->p_filter->fmt_out.video;
218 else *p_fmt_out = p_image->p_dec->fmt_out.video;
223 static picture_t *ImageReadUrl( image_handler_t *p_image, const char *psz_url,
224 video_format_t *p_fmt_in,
225 video_format_t *p_fmt_out )
229 stream_t *p_stream = NULL;
232 p_stream = stream_UrlNew( p_image->p_parent, psz_url );
236 msg_Dbg( p_image->p_parent, "could not open %s for reading",
241 i_size = stream_Size( p_stream );
243 p_block = block_Alloc( i_size );
245 stream_Read( p_stream, p_block->p_buffer, i_size );
247 if( !p_fmt_in->i_chroma )
249 char *psz_mime = NULL;
250 stream_Control( p_stream, STREAM_GET_CONTENT_TYPE, &psz_mime );
252 p_fmt_in->i_chroma = image_Mime2Fourcc( psz_mime );
255 stream_Delete( p_stream );
257 if( !p_fmt_in->i_chroma )
259 /* Try to guess format from file name */
260 p_fmt_in->i_chroma = image_Ext2Fourcc( psz_url );
263 p_pic = ImageRead( p_image, p_block, p_fmt_in, p_fmt_out );
273 static block_t *ImageWrite( image_handler_t *p_image, picture_t *p_pic,
274 video_format_t *p_fmt_in,
275 video_format_t *p_fmt_out )
279 /* Check if we can reuse the current encoder */
280 if( p_image->p_enc &&
281 ( p_image->p_enc->fmt_out.i_codec != p_fmt_out->i_chroma ||
282 p_image->p_enc->fmt_out.video.i_width != p_fmt_out->i_width ||
283 p_image->p_enc->fmt_out.video.i_height != p_fmt_out->i_height ) )
285 DeleteEncoder( p_image->p_enc );
289 /* Start an encoder */
290 if( !p_image->p_enc )
292 p_image->p_enc = CreateEncoder( p_image->p_parent,
293 p_fmt_in, p_fmt_out );
294 if( !p_image->p_enc ) return NULL;
297 /* Check if we need chroma conversion or resizing */
298 if( p_image->p_enc->fmt_in.video.i_chroma != p_fmt_in->i_chroma ||
299 p_image->p_enc->fmt_in.video.i_width != p_fmt_in->i_width ||
300 p_image->p_enc->fmt_in.video.i_height != p_fmt_in->i_height )
302 picture_t *p_tmp_pic;
304 if( p_image->p_filter )
305 if( p_image->p_filter->fmt_in.video.i_chroma != p_fmt_in->i_chroma ||
306 p_image->p_filter->fmt_out.video.i_chroma !=
307 p_image->p_enc->fmt_in.video.i_chroma )
309 /* We need to restart a new filter */
310 DeleteFilter( p_image->p_filter );
311 p_image->p_filter = 0;
315 if( !p_image->p_filter )
318 es_format_Init( &fmt_in, VIDEO_ES, p_fmt_in->i_chroma );
319 fmt_in.video = *p_fmt_in;
322 CreateFilter( p_image->p_parent, &fmt_in,
323 &p_image->p_enc->fmt_in.video, NULL );
325 if( !p_image->p_filter )
332 /* Filters should handle on-the-fly size changes */
333 p_image->p_filter->fmt_in.i_codec = p_fmt_in->i_chroma;
334 p_image->p_filter->fmt_out.video = *p_fmt_in;
335 p_image->p_filter->fmt_out.i_codec =p_image->p_enc->fmt_in.i_codec;
336 p_image->p_filter->fmt_out.video = p_image->p_enc->fmt_in.video;
339 picture_Hold( p_pic );
342 p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
344 if( likely(p_tmp_pic != NULL) )
346 p_block = p_image->p_enc->pf_encode_video( p_image->p_enc,
348 p_image->p_filter->pf_video_buffer_del( p_image->p_filter,
356 p_block = p_image->p_enc->pf_encode_video( p_image->p_enc, p_pic );
361 msg_Dbg( p_image->p_parent, "no image encoded" );
368 static int ImageWriteUrl( image_handler_t *p_image, picture_t *p_pic,
369 video_format_t *p_fmt_in, video_format_t *p_fmt_out,
370 const char *psz_url )
375 if( !p_fmt_out->i_chroma )
377 /* Try to guess format from file name */
378 p_fmt_out->i_chroma = image_Ext2Fourcc( psz_url );
381 file = vlc_fopen( psz_url, "wb" );
384 msg_Err( p_image->p_parent, "%s: %m", psz_url );
388 p_block = ImageWrite( p_image, p_pic, p_fmt_in, p_fmt_out );
393 if( fwrite( p_block->p_buffer, p_block->i_buffer, 1, file ) != 1 )
395 block_Release( p_block );
398 if( fclose( file ) && !err )
404 msg_Err( p_image->p_parent, "%s: %m", psz_url );
407 return err ? VLC_EGENERIC : VLC_SUCCESS;
411 * Convert an image to a different format
415 static picture_t *ImageConvert( image_handler_t *p_image, picture_t *p_pic,
416 video_format_t *p_fmt_in,
417 video_format_t *p_fmt_out )
421 if( !p_fmt_out->i_width && !p_fmt_out->i_height &&
422 p_fmt_out->i_sar_num && p_fmt_out->i_sar_den &&
423 p_fmt_out->i_sar_num * p_fmt_in->i_sar_den !=
424 p_fmt_out->i_sar_den * p_fmt_in->i_sar_num )
427 p_fmt_in->i_sar_num * (int64_t)p_fmt_out->i_sar_den *
428 p_fmt_in->i_width / p_fmt_in->i_sar_den / p_fmt_out->i_sar_num;
429 p_fmt_out->i_visible_width =
430 p_fmt_in->i_sar_num * (int64_t)p_fmt_out->i_sar_den *
431 p_fmt_in->i_visible_width / p_fmt_in->i_sar_den /
432 p_fmt_out->i_sar_num;
435 if( !p_fmt_out->i_chroma ) p_fmt_out->i_chroma = p_fmt_in->i_chroma;
436 if( !p_fmt_out->i_width )
437 p_fmt_out->i_width = p_fmt_out->i_visible_width = p_fmt_in->i_width;
438 if( !p_fmt_out->i_height )
439 p_fmt_out->i_height = p_fmt_out->i_visible_height = p_fmt_in->i_height;
440 if( !p_fmt_out->i_sar_num ) p_fmt_out->i_sar_num = p_fmt_in->i_sar_num;
441 if( !p_fmt_out->i_sar_den ) p_fmt_out->i_sar_den = p_fmt_in->i_sar_den;
443 if( p_image->p_filter )
444 if( p_image->p_filter->fmt_in.video.i_chroma != p_fmt_in->i_chroma ||
445 p_image->p_filter->fmt_out.video.i_chroma != p_fmt_out->i_chroma )
447 /* We need to restart a new filter */
448 DeleteFilter( p_image->p_filter );
449 p_image->p_filter = NULL;
453 if( !p_image->p_filter )
456 es_format_Init( &fmt_in, VIDEO_ES, p_fmt_in->i_chroma );
457 fmt_in.video = *p_fmt_in;
460 CreateFilter( p_image->p_parent, &fmt_in, p_fmt_out, NULL );
462 if( !p_image->p_filter )
469 /* Filters should handle on-the-fly size changes */
470 p_image->p_filter->fmt_in.video = *p_fmt_in;
471 p_image->p_filter->fmt_out.video = *p_fmt_out;
474 picture_Hold( p_pic );
476 p_pif = p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
478 if( p_fmt_in->i_chroma == p_fmt_out->i_chroma &&
479 p_fmt_in->i_width == p_fmt_out->i_width &&
480 p_fmt_in->i_height == p_fmt_out->i_height )
482 /* Duplicate image */
483 picture_Release( p_pif ); /* XXX: Better fix must be possible */
484 p_pif = p_image->p_filter->pf_video_buffer_new( p_image->p_filter );
486 picture_Copy( p_pif, p_pic );
493 * Filter an image with a psz_module filter
497 static picture_t *ImageFilter( image_handler_t *p_image, picture_t *p_pic,
498 video_format_t *p_fmt, const char *psz_module )
501 if( !p_image->p_filter )
504 es_format_Init( &fmt, VIDEO_ES, p_fmt->i_chroma );
508 CreateFilter( p_image->p_parent, &fmt, &fmt.video, psz_module );
510 if( !p_image->p_filter )
517 /* Filters should handle on-the-fly size changes */
518 p_image->p_filter->fmt_in.video = *p_fmt;
519 p_image->p_filter->fmt_out.video = *p_fmt;
522 picture_Hold( p_pic );
524 return p_image->p_filter->pf_video_filter( p_image->p_filter, p_pic );
533 vlc_fourcc_t i_codec;
534 const char psz_ext[7];
538 { VLC_CODEC_JPEG, "jpeg" },
539 { VLC_CODEC_JPEG, "jpg" },
540 { VLC_CODEC_JPEGLS, "ljpg" },
541 { VLC_CODEC_PNG, "png" },
542 { VLC_CODEC_PGM, "pgm" },
543 { VLC_CODEC_PGMYUV, "pgmyuv" },
544 { VLC_FOURCC('p','b','m',' '), "pbm" },
545 { VLC_FOURCC('p','a','m',' '), "pam" },
546 { VLC_CODEC_TARGA, "tga" },
547 { VLC_CODEC_BMP, "bmp" },
548 { VLC_CODEC_PNM, "pnm" },
549 { VLC_FOURCC('x','p','m',' '), "xpm" },
550 { VLC_FOURCC('x','c','f',' '), "xcf" },
551 { VLC_CODEC_PCX, "pcx" },
552 { VLC_CODEC_GIF, "gif" },
553 { VLC_CODEC_TIFF, "tif" },
554 { VLC_CODEC_TIFF, "tiff" },
555 { VLC_FOURCC('l','b','m',' '), "lbm" },
556 { VLC_CODEC_PPM, "ppm" },
559 vlc_fourcc_t image_Type2Fourcc( const char *psz_type )
561 for( unsigned i = 0; i < ARRAY_SIZE(ext_table); i++ )
562 if( !strcasecmp( ext_table[i].psz_ext, psz_type ) )
563 return ext_table[i].i_codec;
568 vlc_fourcc_t image_Ext2Fourcc( const char *psz_name )
570 psz_name = strrchr( psz_name, '.' );
571 if( !psz_name ) return 0;
574 return image_Type2Fourcc( psz_name );
578 static const char *Fourcc2Ext( vlc_fourcc_t i_codec )
580 for( unsigned i = 0; i < ARRAY_SIZE(ext_table); i++ )
581 if( ext_table[i].i_codec == i_codec )
582 return ext_table[i].psz_ext;
590 vlc_fourcc_t i_codec;
591 const char *psz_mime;
594 { VLC_CODEC_BMP, "image/bmp" },
595 { VLC_CODEC_BMP, "image/x-bmp" },
596 { VLC_CODEC_BMP, "image/x-bitmap" },
597 { VLC_CODEC_BMP, "image/x-ms-bmp" },
598 { VLC_CODEC_PNM, "image/x-portable-anymap" },
599 { VLC_CODEC_PNM, "image/x-portable-bitmap" },
600 { VLC_CODEC_PNM, "image/x-portable-graymap" },
601 { VLC_CODEC_PNM, "image/x-portable-pixmap" },
602 { VLC_CODEC_GIF, "image/gif" },
603 { VLC_CODEC_JPEG, "image/jpeg" },
604 { VLC_CODEC_PCX, "image/pcx" },
605 { VLC_CODEC_PNG, "image/png" },
606 { VLC_CODEC_TIFF, "image/tiff" },
607 { VLC_CODEC_TARGA, "image/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_NewFromFormat( &p_dec->fmt_out.video );
628 static void video_del_buffer( decoder_t *p_dec, picture_t *p_pic )
631 picture_Release( p_pic );
634 static void video_link_picture( decoder_t *p_dec, picture_t *p_pic )
637 picture_Hold( p_pic );
640 static void video_unlink_picture( decoder_t *p_dec, picture_t *p_pic )
643 picture_Release( p_pic );
646 static decoder_t *CreateDecoder( vlc_object_t *p_this, video_format_t *fmt )
650 p_dec = vlc_custom_create( p_this, sizeof( *p_dec ), "image decoder" );
654 p_dec->p_module = NULL;
655 es_format_Init( &p_dec->fmt_in, VIDEO_ES, fmt->i_chroma );
656 es_format_Init( &p_dec->fmt_out, VIDEO_ES, 0 );
657 p_dec->fmt_in.video = *fmt;
658 p_dec->b_pace_control = true;
660 p_dec->pf_vout_buffer_new = video_new_buffer;
661 p_dec->pf_vout_buffer_del = video_del_buffer;
662 p_dec->pf_picture_link = video_link_picture;
663 p_dec->pf_picture_unlink = video_unlink_picture;
665 /* Find a suitable decoder module */
666 p_dec->p_module = module_need( p_dec, "decoder", "$codec", false );
667 if( !p_dec->p_module )
669 msg_Err( p_dec, "no suitable decoder module for fourcc `%4.4s'. "
670 "VLC probably does not support this image format.",
671 (char*)&p_dec->fmt_in.i_codec );
673 DeleteDecoder( p_dec );
680 static void DeleteDecoder( decoder_t * p_dec )
682 if( p_dec->p_module ) module_unneed( p_dec, p_dec->p_module );
684 es_format_Clean( &p_dec->fmt_in );
685 es_format_Clean( &p_dec->fmt_out );
687 if( p_dec->p_description )
688 vlc_meta_Delete( p_dec->p_description );
690 vlc_object_release( p_dec );
694 static encoder_t *CreateEncoder( vlc_object_t *p_this, video_format_t *fmt_in,
695 video_format_t *fmt_out )
699 p_enc = sout_EncoderCreate( p_this );
703 p_enc->p_module = NULL;
704 es_format_Init( &p_enc->fmt_in, VIDEO_ES, fmt_in->i_chroma );
705 p_enc->fmt_in.video = *fmt_in;
706 if( fmt_out->i_width > 0 && fmt_out->i_height > 0 )
708 p_enc->fmt_in.video.i_width = fmt_out->i_width;
709 p_enc->fmt_in.video.i_height = fmt_out->i_height;
711 if( fmt_out->i_visible_width > 0 &&
712 fmt_out->i_visible_height > 0 )
714 p_enc->fmt_in.video.i_visible_width = fmt_out->i_visible_width;
715 p_enc->fmt_in.video.i_visible_height = fmt_out->i_visible_height;
719 p_enc->fmt_in.video.i_visible_width = fmt_out->i_width;
720 p_enc->fmt_in.video.i_visible_height = fmt_out->i_height;
723 else if( fmt_out->i_sar_num && fmt_out->i_sar_den &&
724 fmt_out->i_sar_num * fmt_in->i_sar_den !=
725 fmt_out->i_sar_den * fmt_in->i_sar_num )
727 p_enc->fmt_in.video.i_width =
728 fmt_in->i_sar_num * (int64_t)fmt_out->i_sar_den * fmt_in->i_width /
729 fmt_in->i_sar_den / fmt_out->i_sar_num;
730 p_enc->fmt_in.video.i_visible_width =
731 fmt_in->i_sar_num * (int64_t)fmt_out->i_sar_den *
732 fmt_in->i_visible_width / fmt_in->i_sar_den / fmt_out->i_sar_num;
735 p_enc->fmt_in.video.i_frame_rate = 25;
736 p_enc->fmt_in.video.i_frame_rate_base = 1;
738 es_format_Init( &p_enc->fmt_out, VIDEO_ES, fmt_out->i_chroma );
739 p_enc->fmt_out.video = *fmt_out;
740 p_enc->fmt_out.video.i_width = p_enc->fmt_in.video.i_width;
741 p_enc->fmt_out.video.i_height = p_enc->fmt_in.video.i_height;
743 /* Find a suitable decoder module */
744 p_enc->p_module = module_need( p_enc, "encoder", NULL, false );
745 if( !p_enc->p_module )
747 msg_Err( p_enc, "no suitable encoder module for fourcc `%4.4s'.\n"
748 "VLC probably does not support this image format.",
749 (char*)&p_enc->fmt_out.i_codec );
751 DeleteEncoder( p_enc );
754 p_enc->fmt_in.video.i_chroma = p_enc->fmt_in.i_codec;
759 static void DeleteEncoder( encoder_t * p_enc )
761 if( p_enc->p_module ) module_unneed( p_enc, p_enc->p_module );
763 es_format_Clean( &p_enc->fmt_in );
764 es_format_Clean( &p_enc->fmt_out );
766 vlc_object_release( p_enc );
770 static filter_t *CreateFilter( vlc_object_t *p_this, es_format_t *p_fmt_in,
771 video_format_t *p_fmt_out,
772 const char *psz_module )
776 p_filter = vlc_custom_create( p_this, sizeof(filter_t), "filter" );
777 p_filter->pf_video_buffer_new =
778 (picture_t *(*)(filter_t *))video_new_buffer;
779 p_filter->pf_video_buffer_del =
780 (void (*)(filter_t *, picture_t *))video_del_buffer;
782 p_filter->fmt_in = *p_fmt_in;
783 p_filter->fmt_out = *p_fmt_in;
784 p_filter->fmt_out.i_codec = p_fmt_out->i_chroma;
785 p_filter->fmt_out.video = *p_fmt_out;
786 p_filter->p_module = module_need( p_filter, "video filter2",
789 if( !p_filter->p_module )
791 msg_Dbg( p_filter, "no video filter found" );
792 DeleteFilter( p_filter );
799 static void DeleteFilter( filter_t * p_filter )
801 if( p_filter->p_module ) module_unneed( p_filter, p_filter->p_module );
803 es_format_Clean( &p_filter->fmt_in );
804 es_format_Clean( &p_filter->fmt_out );
806 vlc_object_release( p_filter );