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/decoder.h>
29 #include "vlc_filter.h"
34 void *( *swscale_fast_memcpy )( void *, const void *, size_t );
36 /*****************************************************************************
37 * filter_sys_t : filter descriptor
38 *****************************************************************************/
41 struct SwsContext *ctx;
42 SwsFilter *p_src_filter;
43 SwsFilter *p_dst_filter;
44 int i_cpu_mask, i_sws_flags;
50 /****************************************************************************
52 ****************************************************************************/
53 static int OpenFilter ( vlc_object_t * );
54 static void CloseFilter( vlc_object_t * );
56 static picture_t *Filter( filter_t *, picture_t * );
57 static int CheckInit( filter_t * );
58 static int GetSwscaleChroma( vlc_fourcc_t );
60 /*****************************************************************************
62 *****************************************************************************/
63 #define MODE_TEXT N_("Scaling mode")
64 #define MODE_LONGTEXT N_("Scaling mode to use.")
66 static int pi_mode_values[] = { 0, 1, 2, 4, 8, 5, 6, 9, 10 };
67 static char *ppsz_mode_descriptions[] =
68 { N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
69 N_("Experimental"), N_("Nearest neighbour (bad quality)"),
70 N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
71 N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
74 set_description( _("Video scaling filter") );
75 set_capability( "video filter2", 1000 );
76 set_category( CAT_VIDEO );
77 set_subcategory( SUBCAT_VIDEO_VFILTER );
78 set_callbacks( OpenFilter, CloseFilter );
80 add_integer( "swscale-mode", 0, NULL, MODE_TEXT, MODE_LONGTEXT, VLC_TRUE );
81 change_integer_list( pi_mode_values, ppsz_mode_descriptions, 0 );
84 /*****************************************************************************
85 * OpenFilter: probe the filter and return score
86 *****************************************************************************/
87 static int OpenFilter( vlc_object_t *p_this )
89 filter_t *p_filter = (filter_t*)p_this;
93 unsigned int i_fmt_in, i_fmt_out;
96 float sws_lum_gblur = 0.0, sws_chr_gblur = 0.0;
97 int sws_chr_vshift = 0, sws_chr_hshift = 0;
98 float sws_chr_sharpen = 0.0, sws_lum_sharpen = 0.0;
100 /* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
101 * BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
102 if( !(i_fmt_in = GetSwscaleChroma(p_filter->fmt_in.video.i_chroma)) )
107 /* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
108 * {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
109 if( !(i_fmt_out = GetSwscaleChroma(p_filter->fmt_out.video.i_chroma)) )
114 /* Allocate the memory needed to store the decoder's structure */
115 if( ( p_filter->p_sys = p_sys =
116 (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
118 msg_Err( p_filter, "out of memory" );
122 swscale_fast_memcpy = p_filter->p_vlc->pf_memcpy;
124 /* Set CPU capabilities */
125 p_sys->i_cpu_mask = 0;
126 if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_MMX )
128 p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
130 if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_MMXEXT )
132 p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
134 if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_3DNOW )
136 p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
138 if( p_filter->p_libvlc->i_cpu & CPU_CAPABILITY_ALTIVEC )
140 p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
143 var_Create( p_filter, "swscale-mode", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
144 var_Get( p_filter, "swscale-mode", &val );
145 i_sws_mode = val.i_int;
149 case 0: p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
150 case 1: p_sys->i_sws_flags = SWS_BILINEAR; break;
151 case 2: p_sys->i_sws_flags = SWS_BICUBIC; break;
152 case 3: p_sys->i_sws_flags = SWS_X; break;
153 case 4: p_sys->i_sws_flags = SWS_POINT; break;
154 case 5: p_sys->i_sws_flags = SWS_AREA; break;
155 case 6: p_sys->i_sws_flags = SWS_BICUBLIN; break;
156 case 7: p_sys->i_sws_flags = SWS_GAUSS; break;
157 case 8: p_sys->i_sws_flags = SWS_SINC; break;
158 case 9: p_sys->i_sws_flags = SWS_LANCZOS; break;
159 case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
160 default: p_sys->i_sws_flags = SWS_FAST_BILINEAR; i_sws_mode = 0; break;
163 p_sys->p_src_filter = 0; p_sys->p_dst_filter = 0;
164 p_sys->p_src_filter =
165 sws_getDefaultFilter( sws_lum_gblur, sws_chr_gblur,
166 sws_lum_sharpen, sws_chr_sharpen,
167 sws_chr_hshift, sws_chr_vshift, 0 );
171 p_filter->pf_video_filter = Filter;
172 es_format_Init( &p_sys->fmt_in, 0, 0 );
173 es_format_Init( &p_sys->fmt_out, 0, 0 );
175 if( CheckInit( p_filter ) != VLC_SUCCESS )
177 if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
182 msg_Dbg( p_filter, "%ix%i chroma: %4.4s -> %ix%i chroma: %4.4s",
183 p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
184 (char *)&p_filter->fmt_in.video.i_chroma,
185 p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
186 (char *)&p_filter->fmt_out.video.i_chroma );
188 if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
189 p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height )
191 msg_Dbg( p_filter, "scaling mode: %s",
192 ppsz_mode_descriptions[i_sws_mode] );
198 /*****************************************************************************
199 * CloseFilter: clean up the filter
200 *****************************************************************************/
201 static void CloseFilter( vlc_object_t *p_this )
203 filter_t *p_filter = (filter_t*)p_this;
204 filter_sys_t *p_sys = p_filter->p_sys;
206 if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
207 if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
211 /*****************************************************************************
212 * CheckInit: Initialise filter when necessary
213 *****************************************************************************/
214 static int CheckInit( filter_t *p_filter )
216 filter_sys_t *p_sys = p_filter->p_sys;
218 if( p_filter->fmt_in.video.i_width != p_sys->fmt_in.video.i_width ||
219 p_filter->fmt_in.video.i_height != p_sys->fmt_in.video.i_height ||
220 p_filter->fmt_out.video.i_width != p_sys->fmt_out.video.i_width ||
221 p_filter->fmt_out.video.i_height != p_sys->fmt_out.video.i_height )
223 unsigned int i_fmt_in, i_fmt_out;
225 if( !(i_fmt_in = GetSwscaleChroma(p_filter->fmt_in.video.i_chroma)) ||
226 !(i_fmt_out = GetSwscaleChroma(p_filter->fmt_out.video.i_chroma)) )
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 );
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 0;
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 sws_scale_ordered( p_sys->ctx, src, src_stride,
298 0, p_filter->fmt_in.video.i_height,
301 p_pic_dst->date = p_pic->date;
302 p_pic_dst->b_force = p_pic->b_force;
303 p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
304 p_pic_dst->b_progressive = p_pic->b_progressive;
305 p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
307 p_pic->pf_release( p_pic );
311 /*****************************************************************************
312 * Chroma fourcc -> ffmpeg_id mapping
313 *****************************************************************************/
316 vlc_fourcc_t i_chroma;
317 unsigned int i_swscale_chroma;
321 /* Planar YUV formats */
322 { VLC_FOURCC('Y','V','1','2'), IMGFMT_YV12 },
323 { VLC_FOURCC('I','4','2','0'), IMGFMT_I420 },
324 { VLC_FOURCC('I','Y','U','V'), IMGFMT_IYUV },
325 { VLC_FOURCC('I','4','4','4'), IMGFMT_444P },
326 { VLC_FOURCC('Y','U','V','A'), IMGFMT_444P },
327 { VLC_FOURCC('I','4','2','2'), IMGFMT_422P },
328 { VLC_FOURCC('I','4','1','1'), IMGFMT_411P },
330 { VLC_FOURCC('Y','U','V','P'), IMGFMT_Y800 },
333 /* Packed YUV formats */
334 { VLC_FOURCC('U','Y','V','Y'), IMGFMT_UYVY },
335 { VLC_FOURCC('Y','U','Y','2'), IMGFMT_YUY2 },
337 /* Packed RGB formats */
338 { VLC_FOURCC('R','V','1','5'), IMGFMT_RGB15 },
339 { VLC_FOURCC('R','V','1','6'), IMGFMT_RGB16 },
340 { VLC_FOURCC('R','V','2','4'), IMGFMT_RGB24 },
341 { VLC_FOURCC('R','V','3','2'), IMGFMT_RGB32 },
342 { VLC_FOURCC('G','R','E','Y'), IMGFMT_RGB8 },
347 static int GetSwscaleChroma( vlc_fourcc_t i_chroma )
351 for( i = 0; chroma_table[i].i_chroma != 0; i++ )
353 if( chroma_table[i].i_chroma == i_chroma )
354 return chroma_table[i].i_swscale_chroma;