a559dfb9b3444226423a9922608ebd31f6112b78
[vlc.git] / modules / codec / ffmpeg / scale.c
1 /*****************************************************************************
2  * filter.c: video scaling module using the swscale library
3  *****************************************************************************
4  * Copyright (C) 2003 the VideoLAN team
5  * $Id$
6  *
7  * Author: Gildas Bazin <gbazin@videolan.org>
8  *
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.
13  *
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.
18  *
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  *****************************************************************************/
23
24 /*****************************************************************************
25  * Preamble
26  *****************************************************************************/
27 #ifdef HAVE_CONFIG_H
28 # include "config.h"
29 #endif
30
31 #include <vlc/vlc.h>
32 #include <vlc_codec.h>
33 #include <vlc_vout.h>
34 #include <vlc_filter.h>
35
36 /* ffmpeg headers */
37 #ifdef HAVE_LIBAVCODEC_AVCODEC_H
38 #   include <libavcodec/avcodec.h>
39 #elif defined(HAVE_FFMPEG_AVCODEC_H)
40 #   include <ffmpeg/avcodec.h>
41 #else
42 #   include <avcodec.h>
43 #endif
44
45 #ifdef HAVE_LIBSWSCALE_SWSCALE_H
46 #   include <libswscale/swscale.h>
47 #elif defined(HAVE_FFMPEG_SWSCALE_H)
48 #   include <ffmpeg/swscale.h>
49 #endif
50
51 #include "ffmpeg.h"
52
53 /* Version checking */
54 #if ( (defined(HAVE_LIBSWSCALE_SWSCALE_H) || defined(HAVE_FFMPEG_SWSCALE_H)) && (LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0)) )
55
56 /*****************************************************************************
57  * filter_sys_t : filter descriptor
58  *****************************************************************************/
59 struct filter_sys_t
60 {
61     struct SwsContext *ctx;
62     SwsFilter *p_src_filter;
63     SwsFilter *p_dst_filter;
64     int i_cpu_mask, i_sws_flags;
65
66     es_format_t fmt_in;
67     es_format_t fmt_out;
68 };
69
70 /****************************************************************************
71  * Local prototypes
72  ****************************************************************************/
73 void *( *swscale_fast_memcpy )( void *, const void *, size_t );
74 static picture_t *Filter( filter_t *, picture_t * );
75 static int CheckInit( filter_t * );
76
77 static const char *ppsz_mode_descriptions[] =
78 { N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
79   N_("Experimental"), N_("Nearest neighbour (bad quality)"),
80   N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
81   N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
82
83 /*****************************************************************************
84  * OpenScaler: probe the filter and return score
85  *****************************************************************************/
86 int OpenScaler( vlc_object_t *p_this )
87 {
88     filter_t *p_filter = (filter_t*)p_this;
89     filter_sys_t *p_sys;
90     vlc_value_t val;
91
92     int i_fmt_in, i_fmt_out;
93     unsigned int i_cpu;
94     int i_sws_mode;
95
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;
99
100     /* Supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24,
101      * BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09 */
102     i_fmt_in = GetFfmpegChroma(p_filter->fmt_in.video.i_chroma);
103     /* Supported output formats: YV12, I420/IYUV, YUY2, UYVY,
104      * {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09 */
105     i_fmt_out = GetFfmpegChroma(p_filter->fmt_out.video.i_chroma);
106     if( ( i_fmt_in < 0 ) || ( i_fmt_out < 0 ) )
107     {
108         return VLC_EGENERIC;
109     }
110
111     /* Allocate the memory needed to store the decoder's structure */
112     if( ( p_filter->p_sys = p_sys =
113           (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
114     {
115         return VLC_ENOMEM;
116     }
117
118     swscale_fast_memcpy = vlc_memcpy;
119
120     /* Set CPU capabilities */
121     i_cpu = vlc_CPU();
122     p_sys->i_cpu_mask = 0;
123     if( i_cpu & CPU_CAPABILITY_MMX )
124     {
125         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX;
126     }
127 #if (LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0))
128     if( i_cpu & CPU_CAPABILITY_MMXEXT )
129     {
130         p_sys->i_cpu_mask |= SWS_CPU_CAPS_MMX2;
131     }
132 #endif
133     if( i_cpu & CPU_CAPABILITY_3DNOW )
134     {
135         p_sys->i_cpu_mask |= SWS_CPU_CAPS_3DNOW;
136     }
137     if( i_cpu & CPU_CAPABILITY_ALTIVEC )
138     {
139         p_sys->i_cpu_mask |= SWS_CPU_CAPS_ALTIVEC;
140     }
141
142     var_Create( p_filter, "swscale-mode", VLC_VAR_INTEGER|VLC_VAR_DOINHERIT );
143     var_Get( p_filter, "swscale-mode", &val );
144     i_sws_mode = val.i_int;
145
146     switch( i_sws_mode )
147     {
148     case 0:  p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
149     case 1:  p_sys->i_sws_flags = SWS_BILINEAR; break;
150     case 2:  p_sys->i_sws_flags = SWS_BICUBIC; break;
151     case 3:  p_sys->i_sws_flags = SWS_X; break;
152     case 4:  p_sys->i_sws_flags = SWS_POINT; break;
153     case 5:  p_sys->i_sws_flags = SWS_AREA; break;
154     case 6:  p_sys->i_sws_flags = SWS_BICUBLIN; break;
155     case 7:  p_sys->i_sws_flags = SWS_GAUSS; break;
156     case 8:  p_sys->i_sws_flags = SWS_SINC; break;
157     case 9:  p_sys->i_sws_flags = SWS_LANCZOS; break;
158     case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
159     default: p_sys->i_sws_flags = SWS_FAST_BILINEAR; i_sws_mode = 0; break;
160     }
161
162     p_sys->p_src_filter = NULL;
163     p_sys->p_dst_filter = NULL;
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 );
168
169     /* Misc init */
170     p_sys->ctx = NULL;
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 );
174
175     if( CheckInit( p_filter ) != VLC_SUCCESS )
176     {
177         if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
178         free( p_sys );
179         return VLC_EGENERIC;
180     }
181
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 );
187
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 )
190     {
191         msg_Dbg( p_filter, "scaling mode: %s",
192                  ppsz_mode_descriptions[i_sws_mode] );
193     }
194
195     return VLC_SUCCESS;
196 }
197
198 /*****************************************************************************
199  * CloseFilter: clean up the filter
200  *****************************************************************************/
201 void CloseScaler( vlc_object_t *p_this )
202 {
203     filter_t *p_filter = (filter_t*)p_this;
204     filter_sys_t *p_sys = p_filter->p_sys;
205
206     if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
207     if( p_sys->p_src_filter ) sws_freeFilter( p_sys->p_src_filter );
208     free( p_sys );
209 }
210
211 /*****************************************************************************
212  * CheckInit: Initialise filter when necessary
213  *****************************************************************************/
214 static int CheckInit( filter_t *p_filter )
215 {
216     filter_sys_t *p_sys = p_filter->p_sys;
217
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 ) )
222     {
223         int i_fmt_in, i_fmt_out;
224
225         i_fmt_in = GetFfmpegChroma(p_filter->fmt_in.video.i_chroma);
226         i_fmt_out = GetFfmpegChroma(p_filter->fmt_out.video.i_chroma);
227         if( (i_fmt_in < 0) || (i_fmt_out < 0) )
228         {
229             msg_Err( p_filter, "format not supported" );
230             return VLC_EGENERIC;
231         }
232
233         if( p_sys->ctx ) sws_freeContext( p_sys->ctx );
234
235         p_sys->ctx =
236             sws_getContext( p_filter->fmt_in.video.i_width,
237                             p_filter->fmt_in.video.i_height, i_fmt_in,
238                             p_filter->fmt_out.video.i_width,
239                             p_filter->fmt_out.video.i_height, i_fmt_out,
240                             p_sys->i_sws_flags | p_sys->i_cpu_mask,
241                             p_sys->p_src_filter, p_sys->p_dst_filter, 0 );
242         if( !p_sys->ctx )
243         {
244             msg_Err( p_filter, "could not init SwScaler" );
245             return VLC_EGENERIC;
246         }
247
248         p_sys->fmt_in = p_filter->fmt_in;
249         p_sys->fmt_out = p_filter->fmt_out;
250     }
251
252     return VLC_SUCCESS;
253 }
254
255 /****************************************************************************
256  * Filter: the whole thing
257  ****************************************************************************
258  * This function is called just after the thread is launched.
259  ****************************************************************************/
260 static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
261 {
262     filter_sys_t *p_sys = p_filter->p_sys;
263     uint8_t *src[3]; int src_stride[3];
264     uint8_t *dst[3]; int dst_stride[3];
265     picture_t *p_pic_dst;
266     int i_plane;
267     int i_nb_planes = p_pic->i_planes;
268
269     /* Check if format properties changed */
270     if( CheckInit( p_filter ) != VLC_SUCCESS ) return NULL;
271
272     /* Request output picture */
273     p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
274     if( !p_pic_dst )
275     {
276         msg_Warn( p_filter, "can't get output picture" );
277         return NULL;
278     }
279
280     if( p_filter->fmt_out.video.i_chroma == VLC_FOURCC('Y','U','V','A') )
281     {
282         i_nb_planes = 3;
283         memset( p_pic_dst->p[3].p_pixels, 0xff, p_filter->fmt_out.video.i_height
284                                                  * p_pic_dst->p[3].i_pitch );
285     }
286
287     for( i_plane = 0; i_plane < __MIN(3, p_pic->i_planes); i_plane++ )
288     {
289         src[i_plane] = p_pic->p[i_plane].p_pixels;
290         src_stride[i_plane] = p_pic->p[i_plane].i_pitch;
291     }
292     for( i_plane = 0; i_plane < __MIN(3, i_nb_planes); i_plane++ )
293     {
294         dst[i_plane] = p_pic_dst->p[i_plane].p_pixels;
295         dst_stride[i_plane] = p_pic_dst->p[i_plane].i_pitch;
296     }
297
298 #if LIBSWSCALE_VERSION_INT  >= ((0<<16)+(5<<8)+0)
299     sws_scale( p_sys->ctx, src, src_stride,
300                0, p_filter->fmt_in.video.i_height,
301                dst, dst_stride );
302 #else
303     sws_scale_ordered( p_sys->ctx, src, src_stride,
304                0, p_filter->fmt_in.video.i_height,
305                dst, dst_stride );
306 #endif
307
308     p_pic_dst->date = p_pic->date;
309     p_pic_dst->b_force = p_pic->b_force;
310     p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
311     p_pic_dst->b_progressive = p_pic->b_progressive;
312     p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
313
314     p_pic->pf_release( p_pic );
315     return p_pic_dst;
316 }
317
318 #else /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */
319
320 int OpenScaler( vlc_object_t *p_this )
321 {
322     return VLC_EGENERIC;
323 }
324
325 void CloseScaler( vlc_object_t *p_this )
326 {
327 }
328
329 #endif /* LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0) */