1 /*****************************************************************************
2 * deinterlace.c : deinterlacer plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2001 VideoLAN
5 * $Id: deinterlace.c,v 1.8 2002/03/19 00:30:44 sam Exp $
7 * Authors: Samuel Hocevar <sam@zoy.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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
31 #include <videolan/vlc.h>
34 #include "video_output.h"
36 #include "filter_common.h"
38 #define DEINTERLACE_MODE_BOB 1
39 #define DEINTERLACE_MODE_BLEND 2
41 /*****************************************************************************
42 * Capabilities defined in the other files.
43 *****************************************************************************/
44 static void vout_getfunctions( function_list_t * p_function_list );
46 static void *memblend( void *, const void *, const void *, size_t );
48 /*****************************************************************************
49 * Build configuration tree.
50 *****************************************************************************/
55 SET_DESCRIPTION( "deinterlacing module" )
56 /* Capability score set to 0 because we don't want to be spawned
57 * as a video output unless explicitly requested to */
58 ADD_CAPABILITY( VOUT, 0 )
59 ADD_SHORTCUT( "deinterlace" )
63 vout_getfunctions( &p_module->p_functions->vout );
66 MODULE_DEACTIVATE_START
67 MODULE_DEACTIVATE_STOP
69 /*****************************************************************************
70 * vout_sys_t: Deinterlace video output method descriptor
71 *****************************************************************************
72 * This structure is part of the video output thread descriptor.
73 * It describes the Deinterlace specific properties of an output thread.
74 *****************************************************************************/
75 typedef struct vout_sys_s
78 struct vout_thread_s *p_vout;
83 /*****************************************************************************
85 *****************************************************************************/
86 static int vout_Create ( struct vout_thread_s * );
87 static int vout_Init ( struct vout_thread_s * );
88 static void vout_End ( struct vout_thread_s * );
89 static void vout_Destroy ( struct vout_thread_s * );
90 static int vout_Manage ( struct vout_thread_s * );
91 static void vout_Render ( struct vout_thread_s *, struct picture_s * );
92 static void vout_Display ( struct vout_thread_s *, struct picture_s * );
94 /*****************************************************************************
95 * Functions exported as capabilities. They are declared as static so that
96 * we don't pollute the namespace too much.
97 *****************************************************************************/
98 static void vout_getfunctions( function_list_t * p_function_list )
100 p_function_list->functions.vout.pf_create = vout_Create;
101 p_function_list->functions.vout.pf_init = vout_Init;
102 p_function_list->functions.vout.pf_end = vout_End;
103 p_function_list->functions.vout.pf_destroy = vout_Destroy;
104 p_function_list->functions.vout.pf_manage = vout_Manage;
105 p_function_list->functions.vout.pf_render = vout_Render;
106 p_function_list->functions.vout.pf_display = vout_Display;
109 /*****************************************************************************
110 * vout_Create: allocates Deinterlace video thread output method
111 *****************************************************************************
112 * This function allocates and initializes a Deinterlace vout method.
113 *****************************************************************************/
114 static int vout_Create( vout_thread_t *p_vout )
116 char *psz_method, *psz_method_tmp;
118 /* Allocate structure */
119 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
120 if( p_vout->p_sys == NULL )
122 intf_ErrMsg("error: %s", strerror(ENOMEM) );
126 /* Look what method was requested */
127 if( !(psz_method = psz_method_tmp
128 = config_GetPszVariable( "filter" )) )
130 intf_ErrMsg( "vout error: configuration variable %s empty",
135 while( *psz_method && *psz_method != ':' )
140 if( !strcmp( psz_method, ":bob" ) )
142 p_vout->p_sys->i_mode = DEINTERLACE_MODE_BOB;
144 else if( !strcmp( psz_method, ":blend" ) )
146 p_vout->p_sys->i_mode = DEINTERLACE_MODE_BLEND;
150 intf_ErrMsg( "filter error: no valid deinterlace mode provided, "
151 "using deinterlace:bob" );
152 p_vout->p_sys->i_mode = DEINTERLACE_MODE_BOB;
155 free( psz_method_tmp );
160 /*****************************************************************************
161 * vout_Init: initialize Deinterlace video thread output method
162 *****************************************************************************/
163 static int vout_Init( vout_thread_t *p_vout )
169 I_OUTPUTPICTURES = 0;
171 /* Initialize the output structure, full of directbuffers since we want
172 * the decoder to output directly to our structures. */
173 switch( p_vout->render.i_chroma )
179 p_vout->output.i_chroma = p_vout->render.i_chroma;
180 p_vout->output.i_width = p_vout->render.i_width;
181 p_vout->output.i_height = p_vout->render.i_height;
182 p_vout->output.i_aspect = p_vout->render.i_aspect;
186 return( 0 ); /* unknown chroma */
190 /* Try to open the real video output, with half the height our images */
191 psz_filter = config_GetPszVariable( "filter" );
192 config_PutPszVariable( "filter", NULL );
194 intf_WarnMsg( 1, "filter: spawning the real video output" );
196 switch( p_vout->render.i_chroma )
201 switch( p_vout->p_sys->i_mode )
203 case DEINTERLACE_MODE_BOB:
204 p_vout->p_sys->p_vout =
205 vout_CreateThread( NULL,
206 p_vout->output.i_width, p_vout->output.i_height / 2,
207 p_vout->output.i_chroma, p_vout->output.i_aspect );
210 case DEINTERLACE_MODE_BLEND:
211 p_vout->p_sys->p_vout =
212 vout_CreateThread( NULL,
213 p_vout->output.i_width, p_vout->output.i_height,
214 p_vout->output.i_chroma, p_vout->output.i_aspect );
220 p_vout->p_sys->p_vout =
221 vout_CreateThread( NULL,
222 p_vout->output.i_width, p_vout->output.i_height,
223 FOURCC_I420, p_vout->output.i_aspect );
230 config_PutPszVariable( "filter", psz_filter );
231 if( psz_filter ) free( psz_filter );
233 /* Everything failed */
234 if( p_vout->p_sys->p_vout == NULL )
236 intf_ErrMsg( "filter error: can't open vout, aborting" );
241 p_vout->p_sys->last_date = 0;
243 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
248 /*****************************************************************************
249 * vout_End: terminate Deinterlace video thread output method
250 *****************************************************************************/
251 static void vout_End( vout_thread_t *p_vout )
255 /* Free the fake output buffers we allocated */
256 for( i_index = I_OUTPUTPICTURES ; i_index ; )
259 free( PP_OUTPUTPICTURE[ i_index ]->p_data );
263 /*****************************************************************************
264 * vout_Destroy: destroy Deinterlace video thread output method
265 *****************************************************************************
266 * Terminate an output method created by DeinterlaceCreateOutputMethod
267 *****************************************************************************/
268 static void vout_Destroy( vout_thread_t *p_vout )
270 vout_DestroyThread( p_vout->p_sys->p_vout, NULL );
272 free( p_vout->p_sys );
275 /*****************************************************************************
276 * vout_Manage: handle Deinterlace events
277 *****************************************************************************
278 * This function should be called regularly by video output thread. It manages
279 * console events. It returns a non null value on error.
280 *****************************************************************************/
281 static int vout_Manage( vout_thread_t *p_vout )
286 /*****************************************************************************
287 * vout_Render: displays previously rendered output
288 *****************************************************************************
289 * This function send the currently rendered image to Deinterlace image,
290 * waits until it is displayed and switch the two rendering buffers, preparing
292 *****************************************************************************/
293 static void vout_Render ( vout_thread_t *p_vout, picture_t *p_pic )
296 int i_plane, i_field;
297 /* 20ms is a bit arbitrary, but it's only for the first image we get */
298 mtime_t new_date = p_vout->p_sys->last_date
299 ? ( 3 * p_pic->date - p_vout->p_sys->last_date ) / 2
300 : p_pic->date + 20000;
302 p_vout->p_sys->last_date = p_pic->date;
304 for( i_field = 0 ; i_field < 2 ; i_field++ )
306 /* Get a structure from the video_output. */
307 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout,
311 if( p_vout->b_die || p_vout->b_error )
315 msleep( VOUT_OUTMEM_SLEEP );
318 vout_DatePicture( p_vout->p_sys->p_vout, p_outpic,
319 p_pic->date + i_field ? new_date : p_pic->date );
321 /* Copy image and skip lines */
322 for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
324 u8 *p_in, *p_out_end, *p_out;
327 p_in = p_pic->p[i_plane].p_pixels
328 + i_field * p_pic->p[i_plane].i_pitch;
330 p_out = p_outpic->p[i_plane].p_pixels;
331 p_out_end = p_out + p_outpic->p[i_plane].i_pitch
332 * p_outpic->p[i_plane].i_lines;
334 switch( p_vout->render.i_chroma )
340 switch( p_vout->p_sys->i_mode )
342 case DEINTERLACE_MODE_BOB:
343 for( ; p_out < p_out_end ; )
345 FAST_MEMCPY( p_out, p_in, p_pic->p[i_plane].i_pitch );
347 p_out += p_pic->p[i_plane].i_pitch;
348 p_in += 2 * p_pic->p[i_plane].i_pitch;
352 case DEINTERLACE_MODE_BLEND:
355 FAST_MEMCPY( p_out, p_in, p_pic->p[i_plane].i_pitch );
356 p_in += 2 * p_pic->p[i_plane].i_pitch;
357 p_out += p_pic->p[i_plane].i_pitch;
360 p_out_end -= p_outpic->p[i_plane].i_pitch;
362 for( ; p_out < p_out_end ; )
364 FAST_MEMCPY( p_out, p_in, p_pic->p[i_plane].i_pitch );
366 p_out += p_pic->p[i_plane].i_pitch;
368 memblend( p_out, p_in,
369 p_in + 2 * p_pic->p[i_plane].i_pitch,
370 p_pic->p[i_plane].i_pitch );
372 p_in += 2 * p_pic->p[i_plane].i_pitch;
373 p_out += p_pic->p[i_plane].i_pitch;
379 p_in -= 2 * p_pic->p[i_plane].i_pitch;
380 FAST_MEMCPY( p_out, p_in, p_pic->p[i_plane].i_pitch );
390 i_increment = 2 * p_pic->p[i_plane].i_pitch;
392 if( i_plane == Y_PLANE )
394 for( ; p_out < p_out_end ; )
396 FAST_MEMCPY( p_out, p_in, p_pic->p[i_plane].i_pitch );
397 p_out += p_pic->p[i_plane].i_pitch;
398 FAST_MEMCPY( p_out, p_in, p_pic->p[i_plane].i_pitch );
399 p_out += p_pic->p[i_plane].i_pitch;
405 for( ; p_out < p_out_end ; )
407 FAST_MEMCPY( p_out, p_in, p_pic->p[i_plane].i_pitch );
408 p_out += p_pic->p[i_plane].i_pitch;
419 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
423 /*****************************************************************************
424 * vout_Display: displays previously rendered output
425 *****************************************************************************
426 * This function send the currently rendered image to Invert image, waits
427 * until it is displayed and switch the two rendering buffers, preparing next
429 *****************************************************************************/
430 static void vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
435 static void *memblend( void *p_dest, const void *p_s1,
436 const void *p_s2, size_t i_bytes )
438 u8* p_end = (u8*)p_dest + i_bytes - 8;
440 while( (u8*)p_dest < p_end )
442 *(u8*)p_dest++ = ( (u16)(*(u8*)p_s1++) + (u16)(*(u8*)p_s2++) ) >> 1;
443 *(u8*)p_dest++ = ( (u16)(*(u8*)p_s1++) + (u16)(*(u8*)p_s2++) ) >> 1;
444 *(u8*)p_dest++ = ( (u16)(*(u8*)p_s1++) + (u16)(*(u8*)p_s2++) ) >> 1;
445 *(u8*)p_dest++ = ( (u16)(*(u8*)p_s1++) + (u16)(*(u8*)p_s2++) ) >> 1;
446 *(u8*)p_dest++ = ( (u16)(*(u8*)p_s1++) + (u16)(*(u8*)p_s2++) ) >> 1;
447 *(u8*)p_dest++ = ( (u16)(*(u8*)p_s1++) + (u16)(*(u8*)p_s2++) ) >> 1;
448 *(u8*)p_dest++ = ( (u16)(*(u8*)p_s1++) + (u16)(*(u8*)p_s2++) ) >> 1;
449 *(u8*)p_dest++ = ( (u16)(*(u8*)p_s1++) + (u16)(*(u8*)p_s2++) ) >> 1;
454 while( (u8*)p_dest < p_end )
456 *(u8*)p_dest++ = ( (u16)(*(u8*)p_s1++) + (u16)(*(u8*)p_s2++) ) >> 1;