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 *****************************************************************************/
28 #include <vlc_codec.h>
30 #include <vlc_filter.h>
33 #ifdef HAVE_FFMPEG_AVCODEC_H
34 # include <ffmpeg/avcodec.h>
39 #ifdef HAVE_FFMPEG_SWSCALE_H
40 # include <ffmpeg/swscale.h>
41 #elif defined(HAVE_LIBSWSCALE_TREE)
47 /* Version checking */
48 #if ( (defined(HAVE_FFMPEG_SWSCALE_H) || defined(HAVE_LIBSWSCALE_TREE)) && (LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0)) )
50 /*****************************************************************************
51 * filter_sys_t : filter descriptor
52 *****************************************************************************/
55 struct SwsContext *ctx;
56 SwsFilter *p_src_filter;
57 SwsFilter *p_dst_filter;
58 int i_cpu_mask, i_sws_flags;
64 /****************************************************************************
66 ****************************************************************************/
67 void *( *swscale_fast_memcpy )( void *, const void *, size_t );
68 static picture_t *Filter( filter_t *, picture_t * );
69 static int CheckInit( filter_t * );
71 static const char *ppsz_mode_descriptions[] =
72 { N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
73 N_("Experimental"), N_("Nearest neighbour (bad quality)"),
74 N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
75 N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
77 /*****************************************************************************
78 * OpenScaler: probe the filter and return score
79 *****************************************************************************/
80 int E_(OpenScaler)( vlc_object_t *p_this )
82 filter_t *p_filter = (filter_t*)p_this;
86 int i_fmt_in, i_fmt_out;
90 float sws_lum_gblur = 0.0, sws_chr_gblur = 0.0;
91 int sws_chr_vshift = 0, sws_chr_hshift = 0;
92 float sws_chr_sharpen = 0.0, sws_lum_sharpen = 0.0;
94 /* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
95 * BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
96 i_fmt_in = E_(GetFfmpegChroma)(p_filter->fmt_in.video.i_chroma);
97 /* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
98 * {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
99 i_fmt_out = E_(GetFfmpegChroma)(p_filter->fmt_out.video.i_chroma);
100 if( ( i_fmt_in < 0 ) || ( i_fmt_out < 0 ) )
105 /* Allocate the memory needed to store the decoder's structure */
106 if( ( p_filter->p_sys = p_sys =
107 (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
109 msg_Err( p_filter, "out of memory" );
113 swscale_fast_memcpy = p_filter->p_libvlc->pf_memcpy;
114 /* Set CPU capabilities */
116 p_sys->i_cpu_mask = 0;
117 if( i_cpu & CPU_CAPABILITY_MMX )
119 p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
122 if( i_cpu & CPU_CAPABILITY_MMXEXT )
124 p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
127 if( i_cpu & CPU_CAPABILITY_3DNOW )
129 p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
131 if( i_cpu & CPU_CAPABILITY_ALTIVEC )
133 p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
136 var_Create( p_filter, "swscale-mode", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
137 var_Get( p_filter, "swscale-mode", &val );
138 i_sws_mode = val.i_int;
142 case 0: p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
143 case 1: p_sys->i_sws_flags = SWS_BILINEAR; break;
144 case 2: p_sys->i_sws_flags = SWS_BICUBIC; break;
145 case 3: p_sys->i_sws_flags = SWS_X; break;
146 case 4: p_sys->i_sws_flags = SWS_POINT; break;
147 case 5: p_sys->i_sws_flags = SWS_AREA; break;
148 case 6: p_sys->i_sws_flags = SWS_BICUBLIN; break;
149 case 7: p_sys->i_sws_flags = SWS_GAUSS; break;
150 case 8: p_sys->i_sws_flags = SWS_SINC; break;
151 case 9: p_sys->i_sws_flags = SWS_LANCZOS; break;
152 case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
153 default: p_sys->i_sws_flags = SWS_FAST_BILINEAR; i_sws_mode = 0; break;
156 p_sys->p_src_filter = NULL;
157 p_sys->p_dst_filter = NULL;
158 p_sys->p_src_filter =
159 sws_getDefaultFilter( sws_lum_gblur, sws_chr_gblur,
160 sws_lum_sharpen, sws_chr_sharpen,
161 sws_chr_hshift, sws_chr_vshift, 0 );
165 p_filter->pf_video_filter = Filter;
166 es_format_Init( &p_sys->fmt_in, 0, 0 );
167 es_format_Init( &p_sys->fmt_out, 0, 0 );
169 if( CheckInit( p_filter ) != VLC_SUCCESS )
171 if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
176 msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s",
177 p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
178 (char *)&p_filter->fmt_in.video.i_chroma,
179 p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
180 (char *)&p_filter->fmt_out.video.i_chroma );
182 if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
183 p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
185 msg_Dbg( p_filter, "scaling mode: %s",
186 ppsz_mode_descriptions[i_sws_mode] );
192 /*****************************************************************************
193 * CloseFilter: clean up the filter
194 *****************************************************************************/
195 void E_(CloseScaler)( vlc_object_t *p_this )
197 filter_t *p_filter = (filter_t*)p_this;
198 filter_sys_t *p_sys = p_filter->p_sys;
200 if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
201 if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
205 /*****************************************************************************
206 * CheckInit: Initialise filter when necessary
207 *****************************************************************************/
208 static int CheckInit( filter_t *p_filter )
210 filter_sys_t *p_sys = p_filter->p_sys;
212 if( ( p_filter->fmt_in.video.i_width != p_sys->fmt_in.video.i_width ) ||
213 ( p_filter->fmt_in.video.i_height != p_sys->fmt_in.video.i_height ) ||
214 ( p_filter->fmt_out.video.i_width != p_sys->fmt_out.video.i_width ) ||
215 ( p_filter->fmt_out.video.i_height != p_sys->fmt_out.video.i_height ) )
217 int i_fmt_in, i_fmt_out;
219 i_fmt_in = E_(GetFfmpegChroma)(p_filter->fmt_in.video.i_chroma);
220 i_fmt_out = E_(GetFfmpegChroma)(p_filter->fmt_out.video.i_chroma);
221 if( (i_fmt_in < 0) || (i_fmt_out < 0) )
223 msg_Err( p_filter, "format not supported" );
227 if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
230 sws_getContext( p_filter->fmt_in.video.i_width,
231 p_filter->fmt_in.video.i_height, i_fmt_in,
232 p_filter->fmt_out.video.i_width,
233 p_filter->fmt_out.video.i_height, i_fmt_out,
234 p_sys->i_sws_flags | p_sys->i_cpu_mask,
235 p_sys->p_src_filter, p_sys->p_dst_filter, 0 );
238 msg_Err( p_filter, "could not init SwScaler" );
242 p_sys->fmt_in = p_filter->fmt_in;
243 p_sys->fmt_out = p_filter->fmt_out;
249 /****************************************************************************
250 * Filter: the whole thing
251 ****************************************************************************
252 * This function is called just after the thread is launched.
253 ****************************************************************************/
254 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
256 filter_sys_t *p_sys = p_filter->p_sys;
257 uint8_t *src[3]; int src_stride[3];
258 uint8_t *dst[3]; int dst_stride[3];
259 picture_t *p_pic_dst;
261 int i_nb_planes = p_pic->i_planes;
263 /* Check if format properties changed */
264 if( CheckInit( p_filter ) != VLC_SUCCESS ) return NULL;
266 /* Request output picture */
267 p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
270 msg_Warn( p_filter, "can't get output picture" );
274 if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
277 memset( p_pic_dst->p[3].p_pixels, 0xff, p_filter->fmt_out.video.i_height
278 * p_pic_dst->p[3].i_pitch );
281 for( i_plane = 0; i_plane < __MIN(3, p_pic->i_planes); i_plane++ )
283 src[i_plane] = p_pic->p[i_plane].p_pixels;
284 src_stride[i_plane] = p_pic->p[i_plane].i_pitch;
286 for( i_plane = 0; i_plane < __MIN(3, i_nb_planes); i_plane++ )
288 dst[i_plane] = p_pic_dst->p[i_plane].p_pixels;
289 dst_stride[i_plane] = p_pic_dst->p[i_plane].i_pitch;
292 #if LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0)
293 sws_scale( p_sys->ctx, src, src_stride,
294 0, p_filter->fmt_in.video.i_height,
297 sws_scale_ordered( p_sys->ctx, src, src_stride,
298 0, p_filter->fmt_in.video.i_height,
302 p_pic_dst->date = p_pic->date;
303 p_pic_dst->b_force = p_pic->b_force;
304 p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
305 p_pic_dst->b_progressive = p_pic->b_progressive;
306 p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
308 p_pic->pf_release( p_pic );
312 #else /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */
314 int E_(OpenScaler)( vlc_object_t *p_this )
319 void E_(CloseScaler)( vlc_object_t *p_this )
323 #endif /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */