integer overflows, heap corruption
[ffmpeg.git] / libavformat / grab.c
1 /*
2  * Linux video grab interface
3  * Copyright (c) 2000,2001 Fabrice Bellard.
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this library; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18  */
19 #include "avformat.h"
20 #include <unistd.h>
21 #include <fcntl.h>
22 #include <sys/ioctl.h>
23 #include <sys/mman.h>
24 #include <sys/time.h>
25 #define _LINUX_TIME_H 1
26 #include <linux/videodev.h>
27 #include <time.h>
28
29 typedef struct {
30     int fd;
31     int frame_format; /* see VIDEO_PALETTE_xxx */
32     int use_mmap;
33     int width, height;
34     int frame_rate;
35     int frame_rate_base;
36     int64_t time_frame;
37     int frame_size;
38     struct video_capability video_cap;
39     struct video_audio audio_saved;
40     uint8_t *video_buf;
41     struct video_mbuf gb_buffers;
42     struct video_mmap gb_buf;
43     int gb_frame;
44
45     /* ATI All In Wonder specific stuff */
46     /* XXX: remove and merge in libavcodec/imgconvert.c */
47     int aiw_enabled;
48     int deint;
49     int halfw;
50     uint8_t *src_mem;
51     uint8_t *lum_m4_mem;
52 } VideoData;
53
54 static int aiw_init(VideoData *s);
55 static int aiw_read_picture(VideoData *s, uint8_t *data);
56 static int aiw_close(VideoData *s);
57
58 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
59 {
60     VideoData *s = s1->priv_data;
61     AVStream *st;
62     int width, height;
63     int video_fd, frame_size;
64     int ret, frame_rate, frame_rate_base;
65     int desired_palette;
66     struct video_tuner tuner;
67     struct video_audio audio;
68     const char *video_device;
69     int j;
70
71     if (!ap || ap->width <= 0 || ap->height <= 0 || ap->frame_rate <= 0)
72         return -1;
73     
74     width = ap->width;
75     height = ap->height;
76     frame_rate      = ap->frame_rate;
77     frame_rate_base = ap->frame_rate_base;
78
79     if((unsigned)width > 32767 || (unsigned)height > 32767)
80         return -1;
81     
82     st = av_new_stream(s1, 0);
83     if (!st)
84         return -ENOMEM;
85     av_set_pts_info(st, 48, 1, 1000000); /* 48 bits pts in us */
86
87     s->width = width;
88     s->height = height;
89     s->frame_rate      = frame_rate;
90     s->frame_rate_base = frame_rate_base;
91
92     video_device = ap->device;
93     if (!video_device)
94         video_device = "/dev/video";
95     video_fd = open(video_device, O_RDWR);
96     if (video_fd < 0) {
97         perror(video_device);
98         goto fail;
99     }
100     
101     if (ioctl(video_fd,VIDIOCGCAP, &s->video_cap) < 0) {
102         perror("VIDIOCGCAP");
103         goto fail;
104     }
105
106     if (!(s->video_cap.type & VID_TYPE_CAPTURE)) {
107         av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not handle capture\n");
108         goto fail;
109     }
110
111     desired_palette = -1;
112     if (st->codec.pix_fmt == PIX_FMT_YUV420P) {
113         desired_palette = VIDEO_PALETTE_YUV420P;
114     } else if (st->codec.pix_fmt == PIX_FMT_YUV422) {
115         desired_palette = VIDEO_PALETTE_YUV422;
116     } else if (st->codec.pix_fmt == PIX_FMT_BGR24) {
117         desired_palette = VIDEO_PALETTE_RGB24;
118     }    
119
120     /* set tv standard */
121     if (ap->standard && !ioctl(video_fd, VIDIOCGTUNER, &tuner)) {
122         if (!strcasecmp(ap->standard, "pal"))
123             tuner.mode = VIDEO_MODE_PAL;
124         else if (!strcasecmp(ap->standard, "secam"))
125             tuner.mode = VIDEO_MODE_SECAM;
126         else
127             tuner.mode = VIDEO_MODE_NTSC;
128         ioctl(video_fd, VIDIOCSTUNER, &tuner);
129     }
130     
131     /* unmute audio */
132     audio.audio = 0;
133     ioctl(video_fd, VIDIOCGAUDIO, &audio);
134     memcpy(&s->audio_saved, &audio, sizeof(audio));
135     audio.flags &= ~VIDEO_AUDIO_MUTE;
136     ioctl(video_fd, VIDIOCSAUDIO, &audio);
137
138     ret = ioctl(video_fd,VIDIOCGMBUF,&s->gb_buffers);
139     if (ret < 0) {
140         /* try to use read based access */
141         struct video_window win;
142         struct video_picture pict;
143         int val;
144
145         win.x = 0;
146         win.y = 0;
147         win.width = width;
148         win.height = height;
149         win.chromakey = -1;
150         win.flags = 0;
151
152         ioctl(video_fd, VIDIOCSWIN, &win);
153
154         ioctl(video_fd, VIDIOCGPICT, &pict);
155 #if 0
156         printf("v4l: colour=%d hue=%d brightness=%d constrast=%d whiteness=%d\n",
157                pict.colour,
158                pict.hue,
159                pict.brightness,
160                pict.contrast,
161                pict.whiteness);
162 #endif        
163         /* try to choose a suitable video format */
164         pict.palette = desired_palette;
165         if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCSPICT, &pict)) < 0) {
166             pict.palette=VIDEO_PALETTE_YUV420P;
167             ret = ioctl(video_fd, VIDIOCSPICT, &pict);
168             if (ret < 0) {
169                 pict.palette=VIDEO_PALETTE_YUV422;
170                 ret = ioctl(video_fd, VIDIOCSPICT, &pict);
171                 if (ret < 0) {
172                     pict.palette=VIDEO_PALETTE_RGB24;
173                     ret = ioctl(video_fd, VIDIOCSPICT, &pict);
174                     if (ret < 0) 
175                         goto fail1;
176                 }
177             }
178         }
179
180         s->frame_format = pict.palette;
181
182         val = 1;
183         ioctl(video_fd, VIDIOCCAPTURE, &val);
184
185         s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;
186         s->use_mmap = 0;
187         
188         /* ATI All In Wonder automatic activation */
189         if (!strcmp(s->video_cap.name, "Km")) {
190             if (aiw_init(s) < 0)
191                 goto fail;
192             s->aiw_enabled = 1;
193             /* force 420P format because convertion from YUV422 to YUV420P
194                is done in this driver (ugly) */
195             s->frame_format = VIDEO_PALETTE_YUV420P;
196         }
197     } else {
198         s->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_SHARED,video_fd,0);
199         if ((unsigned char*)-1 == s->video_buf) {
200             perror("mmap");
201             goto fail;
202         }
203         s->gb_frame = 0;
204         s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;
205         
206         /* start to grab the first frame */
207         s->gb_buf.frame = s->gb_frame % s->gb_buffers.frames;
208         s->gb_buf.height = height;
209         s->gb_buf.width = width;
210         s->gb_buf.format = desired_palette;
211
212         if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf)) < 0) {
213             s->gb_buf.format = VIDEO_PALETTE_YUV420P;
214             
215             ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
216             if (ret < 0 && errno != EAGAIN) {
217                 /* try YUV422 */
218                 s->gb_buf.format = VIDEO_PALETTE_YUV422;
219                 
220                 ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
221                 if (ret < 0 && errno != EAGAIN) {
222                     /* try RGB24 */
223                     s->gb_buf.format = VIDEO_PALETTE_RGB24;
224                     ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
225                 }
226             }
227         }
228         if (ret < 0) {
229             if (errno != EAGAIN) {
230             fail1:
231                 av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not support suitable format\n");
232             } else {
233                 av_log(s1, AV_LOG_ERROR,"Fatal: grab device does not receive any video signal\n");
234             }
235             goto fail;
236         }
237         for (j = 1; j < s->gb_buffers.frames; j++) {
238           s->gb_buf.frame = j;
239           ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
240         }
241         s->frame_format = s->gb_buf.format;
242         s->use_mmap = 1;
243     }
244
245     switch(s->frame_format) {
246     case VIDEO_PALETTE_YUV420P:
247         frame_size = (width * height * 3) / 2;
248         st->codec.pix_fmt = PIX_FMT_YUV420P;
249         break;
250     case VIDEO_PALETTE_YUV422:
251         frame_size = width * height * 2;
252         st->codec.pix_fmt = PIX_FMT_YUV422;
253         break;
254     case VIDEO_PALETTE_RGB24:
255         frame_size = width * height * 3;
256         st->codec.pix_fmt = PIX_FMT_BGR24; /* NOTE: v4l uses BGR24, not RGB24 ! */
257         break;
258     default:
259         goto fail;
260     }
261     s->fd = video_fd;
262     s->frame_size = frame_size;
263     
264     st->codec.codec_type = CODEC_TYPE_VIDEO;
265     st->codec.codec_id = CODEC_ID_RAWVIDEO;
266     st->codec.width = width;
267     st->codec.height = height;
268     st->codec.frame_rate      = frame_rate;
269     st->codec.frame_rate_base = frame_rate_base;
270
271     return 0;
272  fail:
273     if (video_fd >= 0)
274         close(video_fd);
275     av_free(st);
276     return AVERROR_IO;
277 }
278
279 static int v4l_mm_read_picture(VideoData *s, uint8_t *buf)
280 {
281     uint8_t *ptr;
282
283     while (ioctl(s->fd, VIDIOCSYNC, &s->gb_frame) < 0 &&
284            (errno == EAGAIN || errno == EINTR));
285
286     ptr = s->video_buf + s->gb_buffers.offsets[s->gb_frame];
287     memcpy(buf, ptr, s->frame_size);
288
289     /* Setup to capture the next frame */
290     s->gb_buf.frame = s->gb_frame;
291     if (ioctl(s->fd, VIDIOCMCAPTURE, &s->gb_buf) < 0) {
292         if (errno == EAGAIN)
293             av_log(NULL, AV_LOG_ERROR, "Cannot Sync\n");
294         else
295             perror("VIDIOCMCAPTURE");
296         return AVERROR_IO;
297     }
298
299     /* This is now the grabbing frame */
300     s->gb_frame = (s->gb_frame + 1) % s->gb_buffers.frames;
301
302     return s->frame_size;
303 }
304
305 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
306 {
307     VideoData *s = s1->priv_data;
308     int64_t curtime, delay;
309     struct timespec ts;
310
311     /* Calculate the time of the next frame */
312     s->time_frame += int64_t_C(1000000);
313
314     /* wait based on the frame rate */
315     for(;;) {
316         curtime = av_gettime();
317         delay = s->time_frame  * s->frame_rate_base / s->frame_rate - curtime;
318         if (delay <= 0) {
319             if (delay < int64_t_C(-1000000) * s->frame_rate_base / s->frame_rate) {
320                 /* printf("grabbing is %d frames late (dropping)\n", (int) -(delay / 16666)); */
321                 s->time_frame += int64_t_C(1000000);
322             }
323             break;
324         }    
325         ts.tv_sec = delay / 1000000;
326         ts.tv_nsec = (delay % 1000000) * 1000;
327         nanosleep(&ts, NULL);
328     }
329
330     if (av_new_packet(pkt, s->frame_size) < 0)
331         return AVERROR_IO;
332
333     pkt->pts = curtime & ((1LL << 48) - 1);
334
335     /* read one frame */
336     if (s->aiw_enabled) {
337         return aiw_read_picture(s, pkt->data);
338     } else if (s->use_mmap) {
339         return v4l_mm_read_picture(s, pkt->data);
340     } else {
341         if (read(s->fd, pkt->data, pkt->size) != pkt->size)
342             return AVERROR_IO;
343         return s->frame_size;
344     }
345 }
346
347 static int grab_read_close(AVFormatContext *s1)
348 {
349     VideoData *s = s1->priv_data;
350
351     if (s->aiw_enabled)
352         aiw_close(s);
353
354     if (s->use_mmap)
355         munmap(s->video_buf, s->gb_buffers.size);
356
357     /* mute audio. we must force it because the BTTV driver does not
358        return its state correctly */
359     s->audio_saved.flags |= VIDEO_AUDIO_MUTE;
360     ioctl(s->fd, VIDIOCSAUDIO, &s->audio_saved);
361
362     close(s->fd);
363     return 0;
364 }
365
366 static AVInputFormat video_grab_device_format = {
367     "video4linux",
368     "video grab",
369     sizeof(VideoData),
370     NULL,
371     grab_read_header,
372     grab_read_packet,
373     grab_read_close,
374     .flags = AVFMT_NOFILE,
375 };
376
377 /* All in Wonder specific stuff */
378 /* XXX: remove and merge in libavcodec/imgconvert.c */
379
380 static int aiw_init(VideoData *s)
381 {
382     int width, height;
383
384     width = s->width;
385     height = s->height;
386
387     if ((width == s->video_cap.maxwidth && height == s->video_cap.maxheight) ||
388         (width == s->video_cap.maxwidth && height == s->video_cap.maxheight*2) ||
389         (width == s->video_cap.maxwidth/2 && height == s->video_cap.maxheight)) {
390         
391         s->deint=0;
392         s->halfw=0;
393         if (height == s->video_cap.maxheight*2) s->deint=1;
394         if (width == s->video_cap.maxwidth/2) s->halfw=1;
395     } else {
396         av_log(NULL, AV_LOG_ERROR, "\nIncorrect Grab Size Supplied - Supported Sizes Are:\n");
397         av_log(NULL, AV_LOG_ERROR, " %dx%d  %dx%d %dx%d\n\n",
398                 s->video_cap.maxwidth,s->video_cap.maxheight,
399                 s->video_cap.maxwidth,s->video_cap.maxheight*2,
400                 s->video_cap.maxwidth/2,s->video_cap.maxheight);
401         goto fail;
402     }
403
404     if (s->halfw == 0) {
405         s->src_mem = av_malloc(s->width*2);
406     } else {
407         s->src_mem = av_malloc(s->width*4);
408     }
409     if (!s->src_mem) goto fail;
410
411     s->lum_m4_mem = av_malloc(s->width);
412     if (!s->lum_m4_mem)
413         goto fail;
414     return 0;
415  fail:
416     av_freep(&s->src_mem);
417     av_freep(&s->lum_m4_mem);
418     return -1;
419 }
420
421 #ifdef HAVE_MMX
422 #include "../libavcodec/i386/mmx.h"
423
424 #define LINE_WITH_UV \
425                     movq_m2r(ptr[0],mm0); \
426                     movq_m2r(ptr[8],mm1);  \
427                     movq_r2r(mm0, mm4); \
428                     punpcklbw_r2r(mm1,mm0); \
429                     punpckhbw_r2r(mm1,mm4); \
430                     movq_r2r(mm0,mm5); \
431                     punpcklbw_r2r(mm4,mm0); \
432                     punpckhbw_r2r(mm4,mm5); \
433                     movq_r2r(mm0,mm1); \
434                     punpcklbw_r2r(mm5,mm1); \
435                     movq_r2m(mm1,lum[0]); \
436                     movq_m2r(ptr[16],mm2); \
437                     movq_m2r(ptr[24],mm1); \
438                     movq_r2r(mm2,mm4); \
439                     punpcklbw_r2r(mm1,mm2); \
440                     punpckhbw_r2r(mm1,mm4); \
441                     movq_r2r(mm2,mm3); \
442                     punpcklbw_r2r(mm4,mm2); \
443                     punpckhbw_r2r(mm4,mm3); \
444                     movq_r2r(mm2,mm1); \
445                     punpcklbw_r2r(mm3,mm1); \
446                     movq_r2m(mm1,lum[8]); \
447                     punpckhdq_r2r(mm2,mm0); \
448                     punpckhdq_r2r(mm3,mm5); \
449                     movq_r2m(mm0,cb[0]); \
450                     movq_r2m(mm5,cr[0]);
451
452 #define LINE_NO_UV \
453                     movq_m2r(ptr[0],mm0);\
454                     movq_m2r(ptr[8],mm1);\
455                     movq_r2r(mm0, mm4);\
456                     punpcklbw_r2r(mm1,mm0); \
457                     punpckhbw_r2r(mm1,mm4);\
458                     movq_r2r(mm0,mm5);\
459                     punpcklbw_r2r(mm4,mm0);\
460                     punpckhbw_r2r(mm4,mm5);\
461                     movq_r2r(mm0,mm1);\
462                     punpcklbw_r2r(mm5,mm1);\
463                     movq_r2m(mm1,lum[0]);\
464                     movq_m2r(ptr[16],mm2);\
465                     movq_m2r(ptr[24],mm1);\
466                     movq_r2r(mm2,mm4);\
467                     punpcklbw_r2r(mm1,mm2);\
468                     punpckhbw_r2r(mm1,mm4);\
469                     movq_r2r(mm2,mm3);\
470                     punpcklbw_r2r(mm4,mm2);\
471                     punpckhbw_r2r(mm4,mm3);\
472                     movq_r2r(mm2,mm1);\
473                     punpcklbw_r2r(mm3,mm1);\
474                     movq_r2m(mm1,lum[8]);
475
476 #define LINE_WITHUV_AVG \
477                     movq_m2r(ptr[0], mm0);\
478                     movq_m2r(ptr[8], mm1);\
479                     movq_r2r(mm0, mm4);\
480                     punpcklbw_r2r(mm1,mm0);\
481                     punpckhbw_r2r(mm1,mm4);\
482                     movq_r2r(mm0,mm5);\
483                     punpcklbw_r2r(mm4,mm0);\
484                     punpckhbw_r2r(mm4,mm5);\
485                     movq_r2r(mm0,mm1);\
486                     movq_r2r(mm5,mm2);\
487                     punpcklbw_r2r(mm7,mm1);\
488                     punpcklbw_r2r(mm7,mm2);\
489                     paddw_r2r(mm6,mm1);\
490                     paddw_r2r(mm2,mm1);\
491                     psraw_i2r(1,mm1);\
492                     packuswb_r2r(mm7,mm1);\
493                     movd_r2m(mm1,lum[0]);\
494                     movq_m2r(ptr[16],mm2);\
495                     movq_m2r(ptr[24],mm1);\
496                     movq_r2r(mm2,mm4);\
497                     punpcklbw_r2r(mm1,mm2);\
498                     punpckhbw_r2r(mm1,mm4);\
499                     movq_r2r(mm2,mm3);\
500                     punpcklbw_r2r(mm4,mm2);\
501                     punpckhbw_r2r(mm4,mm3);\
502                     movq_r2r(mm2,mm1);\
503                     movq_r2r(mm3,mm4);\
504                     punpcklbw_r2r(mm7,mm1);\
505                     punpcklbw_r2r(mm7,mm4);\
506                     paddw_r2r(mm6,mm1);\
507                     paddw_r2r(mm4,mm1);\
508                     psraw_i2r(1,mm1);\
509                     packuswb_r2r(mm7,mm1);\
510                     movd_r2m(mm1,lum[4]);\
511                     punpckhbw_r2r(mm7,mm0);\
512                     punpckhbw_r2r(mm7,mm2);\
513                     paddw_r2r(mm6,mm0);\
514                     paddw_r2r(mm2,mm0);\
515                     psraw_i2r(1,mm0);\
516                     packuswb_r2r(mm7,mm0);\
517                     punpckhbw_r2r(mm7,mm5);\
518                     punpckhbw_r2r(mm7,mm3);\
519                     paddw_r2r(mm6,mm5);\
520                     paddw_r2r(mm3,mm5);\
521                     psraw_i2r(1,mm5);\
522                     packuswb_r2r(mm7,mm5);\
523                     movd_r2m(mm0,cb[0]);\
524                     movd_r2m(mm5,cr[0]);
525
526 #define LINE_NOUV_AVG \
527                     movq_m2r(ptr[0],mm0);\
528                     movq_m2r(ptr[8],mm1);\
529                     pand_r2r(mm5,mm0);\
530                     pand_r2r(mm5,mm1);\
531                     pmaddwd_r2r(mm6,mm0);\
532                     pmaddwd_r2r(mm6,mm1);\
533                     packssdw_r2r(mm1,mm0);\
534                     paddw_r2r(mm6,mm0);\
535                     psraw_i2r(1,mm0);\
536                     movq_m2r(ptr[16],mm2);\
537                     movq_m2r(ptr[24],mm3);\
538                     pand_r2r(mm5,mm2);\
539                     pand_r2r(mm5,mm3);\
540                     pmaddwd_r2r(mm6,mm2);\
541                     pmaddwd_r2r(mm6,mm3);\
542                     packssdw_r2r(mm3,mm2);\
543                     paddw_r2r(mm6,mm2);\
544                     psraw_i2r(1,mm2);\
545                     packuswb_r2r(mm2,mm0);\
546                     movq_r2m(mm0,lum[0]);
547
548 #define DEINT_LINE_LUM(ptroff) \
549                     movd_m2r(lum_m4[(ptroff)],mm0);\
550                     movd_m2r(lum_m3[(ptroff)],mm1);\
551                     movd_m2r(lum_m2[(ptroff)],mm2);\
552                     movd_m2r(lum_m1[(ptroff)],mm3);\
553                     movd_m2r(lum[(ptroff)],mm4);\
554                     punpcklbw_r2r(mm7,mm0);\
555                     movd_r2m(mm2,lum_m4[(ptroff)]);\
556                     punpcklbw_r2r(mm7,mm1);\
557                     punpcklbw_r2r(mm7,mm2);\
558                     punpcklbw_r2r(mm7,mm3);\
559                     punpcklbw_r2r(mm7,mm4);\
560                     psllw_i2r(2,mm1);\
561                     psllw_i2r(1,mm2);\
562                     paddw_r2r(mm6,mm1);\
563                     psllw_i2r(2,mm3);\
564                     paddw_r2r(mm2,mm1);\
565                     paddw_r2r(mm4,mm0);\
566                     paddw_r2r(mm3,mm1);\
567                     psubusw_r2r(mm0,mm1);\
568                     psrlw_i2r(3,mm1);\
569                     packuswb_r2r(mm7,mm1);\
570                     movd_r2m(mm1,lum_m2[(ptroff)]);
571
572 #else
573 #include "../libavcodec/dsputil.h"
574
575 #define LINE_WITH_UV \
576                     lum[0]=ptr[0];lum[1]=ptr[2];lum[2]=ptr[4];lum[3]=ptr[6];\
577                     cb[0]=ptr[1];cb[1]=ptr[5];\
578                     cr[0]=ptr[3];cr[1]=ptr[7];\
579                     lum[4]=ptr[8];lum[5]=ptr[10];lum[6]=ptr[12];lum[7]=ptr[14];\
580                     cb[2]=ptr[9];cb[3]=ptr[13];\
581                     cr[2]=ptr[11];cr[3]=ptr[15];\
582                     lum[8]=ptr[16];lum[9]=ptr[18];lum[10]=ptr[20];lum[11]=ptr[22];\
583                     cb[4]=ptr[17];cb[5]=ptr[21];\
584                     cr[4]=ptr[19];cr[5]=ptr[23];\
585                     lum[12]=ptr[24];lum[13]=ptr[26];lum[14]=ptr[28];lum[15]=ptr[30];\
586                     cb[6]=ptr[25];cb[7]=ptr[29];\
587                     cr[6]=ptr[27];cr[7]=ptr[31];
588
589 #define LINE_NO_UV \
590                     lum[0]=ptr[0];lum[1]=ptr[2];lum[2]=ptr[4];lum[3]=ptr[6];\
591                     lum[4]=ptr[8];lum[5]=ptr[10];lum[6]=ptr[12];lum[7]=ptr[14];\
592                     lum[8]=ptr[16];lum[9]=ptr[18];lum[10]=ptr[20];lum[11]=ptr[22];\
593                     lum[12]=ptr[24];lum[13]=ptr[26];lum[14]=ptr[28];lum[15]=ptr[30];
594
595 #define LINE_WITHUV_AVG \
596                     sum=(ptr[0]+ptr[2]+1) >> 1;lum[0]=sum; \
597                     sum=(ptr[4]+ptr[6]+1) >> 1;lum[1]=sum; \
598                     sum=(ptr[1]+ptr[5]+1) >> 1;cb[0]=sum; \
599                     sum=(ptr[3]+ptr[7]+1) >> 1;cr[0]=sum; \
600                     sum=(ptr[8]+ptr[10]+1) >> 1;lum[2]=sum; \
601                     sum=(ptr[12]+ptr[14]+1) >> 1;lum[3]=sum; \
602                     sum=(ptr[9]+ptr[13]+1) >> 1;cb[1]=sum; \
603                     sum=(ptr[11]+ptr[15]+1) >> 1;cr[1]=sum; \
604                     sum=(ptr[16]+ptr[18]+1) >> 1;lum[4]=sum; \
605                     sum=(ptr[20]+ptr[22]+1) >> 1;lum[5]=sum; \
606                     sum=(ptr[17]+ptr[21]+1) >> 1;cb[2]=sum; \
607                     sum=(ptr[19]+ptr[23]+1) >> 1;cr[2]=sum; \
608                     sum=(ptr[24]+ptr[26]+1) >> 1;lum[6]=sum; \
609                     sum=(ptr[28]+ptr[30]+1) >> 1;lum[7]=sum; \
610                     sum=(ptr[25]+ptr[29]+1) >> 1;cb[3]=sum; \
611                     sum=(ptr[27]+ptr[31]+1) >> 1;cr[3]=sum; 
612
613 #define LINE_NOUV_AVG \
614                     sum=(ptr[0]+ptr[2]+1) >> 1;lum[0]=sum; \
615                     sum=(ptr[4]+ptr[6]+1) >> 1;lum[1]=sum; \
616                     sum=(ptr[8]+ptr[10]+1) >> 1;lum[2]=sum; \
617                     sum=(ptr[12]+ptr[14]+1) >> 1;lum[3]=sum; \
618                     sum=(ptr[16]+ptr[18]+1) >> 1;lum[4]=sum; \
619                     sum=(ptr[20]+ptr[22]+1) >> 1;lum[5]=sum; \
620                     sum=(ptr[24]+ptr[26]+1) >> 1;lum[6]=sum; \
621                     sum=(ptr[28]+ptr[30]+1) >> 1;lum[7]=sum; 
622
623 #define DEINT_LINE_LUM(ptroff) \
624                     sum=(-lum_m4[(ptroff)]+(lum_m3[(ptroff)]<<2)+(lum_m2[(ptroff)]<<1)+(lum_m1[(ptroff)]<<2)-lum[(ptroff)]); \
625                     lum_m4[(ptroff)]=lum_m2[(ptroff)];\
626                     lum_m2[(ptroff)]=cm[(sum+4)>>3];\
627                     sum=(-lum_m4[(ptroff)+1]+(lum_m3[(ptroff)+1]<<2)+(lum_m2[(ptroff)+1]<<1)+(lum_m1[(ptroff)+1]<<2)-lum[(ptroff)+1]); \
628                     lum_m4[(ptroff)+1]=lum_m2[(ptroff)+1];\
629                     lum_m2[(ptroff)+1]=cm[(sum+4)>>3];\
630                     sum=(-lum_m4[(ptroff)+2]+(lum_m3[(ptroff)+2]<<2)+(lum_m2[(ptroff)+2]<<1)+(lum_m1[(ptroff)+2]<<2)-lum[(ptroff)+2]); \
631                     lum_m4[(ptroff)+2]=lum_m2[(ptroff)+2];\
632                     lum_m2[(ptroff)+2]=cm[(sum+4)>>3];\
633                     sum=(-lum_m4[(ptroff)+3]+(lum_m3[(ptroff)+3]<<2)+(lum_m2[(ptroff)+3]<<1)+(lum_m1[(ptroff)+3]<<2)-lum[(ptroff)+3]); \
634                     lum_m4[(ptroff)+3]=lum_m2[(ptroff)+3];\
635                     lum_m2[(ptroff)+3]=cm[(sum+4)>>3];
636
637 #endif
638
639
640 /* Read two fields separately. */
641 static int aiw_read_picture(VideoData *s, uint8_t *data)
642 {
643     uint8_t *ptr, *lum, *cb, *cr;
644     int h;
645 #ifndef HAVE_MMX
646     int sum;
647 #endif
648     uint8_t* src = s->src_mem;
649     uint8_t *ptrend = &src[s->width*2];
650     lum=data;
651     cb=&lum[s->width*s->height];
652     cr=&cb[(s->width*s->height)/4];
653     if (s->deint == 0 && s->halfw == 0) {
654         while (read(s->fd,src,s->width*2) < 0) {
655             usleep(100);
656         }
657         for (h = 0; h < s->height-2; h+=2) {
658             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
659                 LINE_WITH_UV
660                     }
661             read(s->fd,src,s->width*2);
662             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
663                 LINE_NO_UV
664                     }
665             read(s->fd,src,s->width*2);
666         }
667         /*
668          * Do last two lines
669          */
670         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
671             LINE_WITH_UV
672                 }
673         read(s->fd,src,s->width*2);
674         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
675             LINE_NO_UV
676                 }
677         /* drop second field */
678         while (read(s->fd,src,s->width*2) < 0) {
679             usleep(100);
680         }
681         for (h = 0; h < s->height - 1; h++) {
682             read(s->fd,src,s->width*2);
683         }
684     } else if (s->halfw == 1) {
685 #ifdef HAVE_MMX
686         mmx_t rounder;
687         mmx_t masker;
688         rounder.uw[0]=1;
689         rounder.uw[1]=1;
690         rounder.uw[2]=1;
691         rounder.uw[3]=1;
692         masker.ub[0]=0xff;
693         masker.ub[1]=0;
694         masker.ub[2]=0xff;
695         masker.ub[3]=0;
696         masker.ub[4]=0xff;
697         masker.ub[5]=0;
698         masker.ub[6]=0xff;
699         masker.ub[7]=0;
700         pxor_r2r(mm7,mm7);
701         movq_m2r(rounder,mm6);
702 #endif
703         while (read(s->fd,src,s->width*4) < 0) {
704             usleep(100);
705         }
706         ptrend = &src[s->width*4];
707         for (h = 0; h < s->height-2; h+=2) {
708             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {
709                 LINE_WITHUV_AVG
710                     }
711             read(s->fd,src,s->width*4);
712 #ifdef HAVE_MMX
713             movq_m2r(masker,mm5);
714 #endif
715             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {
716                 LINE_NOUV_AVG
717                     }
718             read(s->fd,src,s->width*4);
719         }
720         /*
721  * Do last two lines
722  */
723         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {
724             LINE_WITHUV_AVG
725                 }
726         read(s->fd,src,s->width*4);
727 #ifdef HAVE_MMX
728         movq_m2r(masker,mm5);
729 #endif
730         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {
731             LINE_NOUV_AVG
732                 }
733         /* drop second field */
734         while (read(s->fd,src,s->width*4) < 0) {
735             usleep(100);
736         }
737         for (h = 0; h < s->height - 1; h++) {
738             read(s->fd,src,s->width*4);
739         }
740     } else {
741         uint8_t *lum_m1, *lum_m2, *lum_m3, *lum_m4;
742 #ifdef HAVE_MMX
743         mmx_t rounder;
744         rounder.uw[0]=4;
745         rounder.uw[1]=4;
746         rounder.uw[2]=4;
747         rounder.uw[3]=4;
748         movq_m2r(rounder,mm6);
749         pxor_r2r(mm7,mm7);
750 #else
751         uint8_t *cm = cropTbl + MAX_NEG_CROP;
752 #endif
753
754         /* read two fields and deinterlace them */
755         while (read(s->fd,src,s->width*2) < 0) {
756             usleep(100);
757         }
758         for (h = 0; h < (s->height/2)-2; h+=2) {
759             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
760                 LINE_WITH_UV
761                     }
762             read(s->fd,src,s->width*2);
763             /* skip a luminance line - will be filled in later */
764             lum += s->width;
765             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
766                 LINE_WITH_UV
767                     }
768             /* skip a luminance line - will be filled in later */
769             lum += s->width;
770             read(s->fd,src,s->width*2);
771         }
772         /*
773  * Do last two lines
774  */
775         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
776             LINE_WITH_UV
777                 }
778         /* skip a luminance line - will be filled in later */
779         lum += s->width;
780         read(s->fd,src,s->width*2);
781         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
782             LINE_WITH_UV
783                 }
784         /*
785  *
786  * SECOND FIELD
787  *
788  */
789         lum=&data[s->width];
790         while (read(s->fd,src,s->width*2) < 0) {
791             usleep(10);
792         }
793         /* First (and last) two lines not interlaced */
794         for (h = 0; h < 2; h++) {
795             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
796                 LINE_NO_UV
797                     }
798             read(s->fd,src,s->width*2);
799             /* skip a luminance line */
800             lum += s->width;
801         }
802         lum_m1=&lum[-s->width];
803         lum_m2=&lum_m1[-s->width];
804         lum_m3=&lum_m2[-s->width];
805         memmove(s->lum_m4_mem,&lum_m3[-s->width],s->width);
806         for (; h < (s->height/2)-1; h++) {
807             lum_m4=s->lum_m4_mem;
808             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16,lum_m1+=16,lum_m2+=16,lum_m3+=16,lum_m4+=16) {
809                 LINE_NO_UV
810
811                     DEINT_LINE_LUM(0)
812                     DEINT_LINE_LUM(4)
813                     DEINT_LINE_LUM(8)
814                     DEINT_LINE_LUM(12)
815                     }
816             read(s->fd,src,s->width*2);
817             /* skip a luminance line */
818             lum += s->width;
819             lum_m1 += s->width;
820             lum_m2 += s->width;
821             lum_m3 += s->width;
822             //                lum_m4 += s->width;
823         }
824         /*
825  * Do last line
826  */
827         lum_m4=s->lum_m4_mem;
828         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, lum_m1+=16, lum_m2+=16, lum_m3+=16, lum_m4+=16) {
829             LINE_NO_UV
830
831                 DEINT_LINE_LUM(0)
832                 DEINT_LINE_LUM(4)
833                 DEINT_LINE_LUM(8)
834                 DEINT_LINE_LUM(12)
835                 }
836     }
837 #ifdef HAVE_MMX
838     emms();
839 #endif
840     return s->frame_size;
841 }
842
843 static int aiw_close(VideoData *s)
844 {
845     av_freep(&s->lum_m4_mem);
846     av_freep(&s->src_mem);
847     return 0;
848 }
849
850 int video_grab_init(void)
851 {
852     av_register_input_format(&video_grab_device_format);
853     return 0;
854 }