1 /*****************************************************************************
2 * filter.c: video scaling module using the swscale library
3 *****************************************************************************
4 * Copyright (C) 2003 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 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_codec.h>
34 #include <vlc_filter.h>
37 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
38 # include <libavcodec/avcodec.h>
43 #ifdef HAVE_LIBSWSCALE_SWSCALE_H
44 # include <libswscale/swscale.h>
45 #elif defined(HAVE_LIBSWSCALE_TREE)
51 /* Version checking */
52 #if ( (defined(HAVE_LIBSWSCALE_SWSCALE_H) || defined(HAVE_LIBSWSCALE_TREE)) && (LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0)) )
54 /*****************************************************************************
55 * filter_sys_t : filter descriptor
56 *****************************************************************************/
59 struct SwsContext *ctx;
60 SwsFilter *p_src_filter;
61 SwsFilter *p_dst_filter;
62 int i_cpu_mask, i_sws_flags;
68 /****************************************************************************
70 ****************************************************************************/
71 void *( *swscale_fast_memcpy )( void *, const void *, size_t );
72 static picture_t *Filter( filter_t *, picture_t * );
73 static int CheckInit( filter_t * );
75 static const char *ppsz_mode_descriptions[] =
76 { N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
77 N_("Experimental"), N_("Nearest neighbour (bad quality)"),
78 N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
79 N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
81 /*****************************************************************************
82 * OpenScaler: probe the filter and return score
83 *****************************************************************************/
84 int E_(OpenScaler)( vlc_object_t *p_this )
86 filter_t *p_filter = (filter_t*)p_this;
90 int i_fmt_in, i_fmt_out;
94 float sws_lum_gblur = 0.0, sws_chr_gblur = 0.0;
95 int sws_chr_vshift = 0, sws_chr_hshift = 0;
96 float sws_chr_sharpen = 0.0, sws_lum_sharpen = 0.0;
98 /* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
99 * BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
100 i_fmt_in = E_(GetFfmpegChroma)(p_filter->fmt_in.video.i_chroma);
101 /* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
102 * {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
103 i_fmt_out = E_(GetFfmpegChroma)(p_filter->fmt_out.video.i_chroma);
104 if( ( i_fmt_in < 0 ) || ( i_fmt_out < 0 ) )
109 /* Allocate the memory needed to store the decoder's structure */
110 if( ( p_filter->p_sys = p_sys =
111 (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
113 msg_Err( p_filter, "out of memory" );
117 swscale_fast_memcpy = p_filter->p_libvlc->pf_memcpy;
119 /* Set CPU capabilities */
121 p_sys->i_cpu_mask = 0;
122 if( i_cpu & CPU_CAPABILITY_MMX )
124 p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
126 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0))
127 if( i_cpu & CPU_CAPABILITY_MMXEXT )
129 p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
132 if( i_cpu & CPU_CAPABILITY_3DNOW )
134 p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
136 if( i_cpu & CPU_CAPABILITY_ALTIVEC )
138 p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
141 var_Create( p_filter, "swscale-mode", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
142 var_Get( p_filter, "swscale-mode", &val );
143 i_sws_mode = val.i_int;
147 case 0: p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
148 case 1: p_sys->i_sws_flags = SWS_BILINEAR; break;
149 case 2: p_sys->i_sws_flags = SWS_BICUBIC; break;
150 case 3: p_sys->i_sws_flags = SWS_X; break;
151 case 4: p_sys->i_sws_flags = SWS_POINT; break;
152 case 5: p_sys->i_sws_flags = SWS_AREA; break;
153 case 6: p_sys->i_sws_flags = SWS_BICUBLIN; break;
154 case 7: p_sys->i_sws_flags = SWS_GAUSS; break;
155 case 8: p_sys->i_sws_flags = SWS_SINC; break;
156 case 9: p_sys->i_sws_flags = SWS_LANCZOS; break;
157 case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
158 default: p_sys->i_sws_flags = SWS_FAST_BILINEAR; i_sws_mode = 0; break;
161 p_sys->p_src_filter = NULL;
162 p_sys->p_dst_filter = NULL;
163 p_sys->p_src_filter =
164 sws_getDefaultFilter( sws_lum_gblur, sws_chr_gblur,
165 sws_lum_sharpen, sws_chr_sharpen,
166 sws_chr_hshift, sws_chr_vshift, 0 );
170 p_filter->pf_video_filter = Filter;
171 es_format_Init( &p_sys->fmt_in, 0, 0 );
172 es_format_Init( &p_sys->fmt_out, 0, 0 );
174 if( CheckInit( p_filter ) != VLC_SUCCESS )
176 if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
181 msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s",
182 p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
183 (char *)&p_filter->fmt_in.video.i_chroma,
184 p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
185 (char *)&p_filter->fmt_out.video.i_chroma );
187 if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
188 p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
190 msg_Dbg( p_filter, "scaling mode: %s",
191 ppsz_mode_descriptions[i_sws_mode] );
197 /*****************************************************************************
198 * CloseFilter: clean up the filter
199 *****************************************************************************/
200 void E_(CloseScaler)( vlc_object_t *p_this )
202 filter_t *p_filter = (filter_t*)p_this;
203 filter_sys_t *p_sys = p_filter->p_sys;
205 if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
206 if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
210 /*****************************************************************************
211 * CheckInit: Initialise filter when necessary
212 *****************************************************************************/
213 static int CheckInit( filter_t *p_filter )
215 filter_sys_t *p_sys = p_filter->p_sys;
217 if( ( p_filter->fmt_in.video.i_width != p_sys->fmt_in.video.i_width ) ||
218 ( p_filter->fmt_in.video.i_height != p_sys->fmt_in.video.i_height ) ||
219 ( p_filter->fmt_out.video.i_width != p_sys->fmt_out.video.i_width ) ||
220 ( p_filter->fmt_out.video.i_height != p_sys->fmt_out.video.i_height ) )
222 int i_fmt_in, i_fmt_out;
224 i_fmt_in = E_(GetFfmpegChroma)(p_filter->fmt_in.video.i_chroma);
225 i_fmt_out = E_(GetFfmpegChroma)(p_filter->fmt_out.video.i_chroma);
226 if( (i_fmt_in < 0) || (i_fmt_out < 0) )
228 msg_Err( p_filter, "format not supported" );
232 if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
235 sws_getContext( p_filter->fmt_in.video.i_width,
236 p_filter->fmt_in.video.i_height, i_fmt_in,
237 p_filter->fmt_out.video.i_width,
238 p_filter->fmt_out.video.i_height, i_fmt_out,
239 p_sys->i_sws_flags | p_sys->i_cpu_mask,
240 p_sys->p_src_filter, p_sys->p_dst_filter, 0 );
243 msg_Err( p_filter, "could not init SwScaler" );
247 p_sys->fmt_in = p_filter->fmt_in;
248 p_sys->fmt_out = p_filter->fmt_out;
254 /****************************************************************************
255 * Filter: the whole thing
256 ****************************************************************************
257 * This function is called just after the thread is launched.
258 ****************************************************************************/
259 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
261 filter_sys_t *p_sys = p_filter->p_sys;
262 uint8_t *src[3]; int src_stride[3];
263 uint8_t *dst[3]; int dst_stride[3];
264 picture_t *p_pic_dst;
266 int i_nb_planes = p_pic->i_planes;
268 /* Check if format properties changed */
269 if( CheckInit( p_filter ) != VLC_SUCCESS ) return NULL;
271 /* Request output picture */
272 p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
275 msg_Warn( p_filter, "can't get output picture" );
279 if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
282 memset( p_pic_dst->p[3].p_pixels, 0xff, p_filter->fmt_out.video.i_height
283 * p_pic_dst->p[3].i_pitch );
286 for( i_plane = 0; i_plane < __MIN(3, p_pic->i_planes); i_plane++ )
288 src[i_plane] = p_pic->p[i_plane].p_pixels;
289 src_stride[i_plane] = p_pic->p[i_plane].i_pitch;
291 for( i_plane = 0; i_plane < __MIN(3, i_nb_planes); i_plane++ )
293 dst[i_plane] = p_pic_dst->p[i_plane].p_pixels;
294 dst_stride[i_plane] = p_pic_dst->p[i_plane].i_pitch;
297 #if LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0)
298 sws_scale( p_sys->ctx, src, src_stride,
299 0, p_filter->fmt_in.video.i_height,
302 sws_scale_ordered( p_sys->ctx, src, src_stride,
303 0, p_filter->fmt_in.video.i_height,
307 p_pic_dst->date = p_pic->date;
308 p_pic_dst->b_force = p_pic->b_force;
309 p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
310 p_pic_dst->b_progressive = p_pic->b_progressive;
311 p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
313 p_pic->pf_release( p_pic );
317 #else /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */
319 int E_(OpenScaler)( vlc_object_t *p_this )
324 void E_(CloseScaler)( vlc_object_t *p_this )
328 #endif /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */