COSMETICS: tabs --> spaces, some prettyprinting
[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->time_base.den <= 0)
72         return -1;
73
74     width = ap->width;
75     height = ap->height;
76     frame_rate      = ap->time_base.den;
77     frame_rate_base = ap->time_base.num;
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->time_base.den      = frame_rate;
269     st->codec->time_base.num = frame_rate_base;
270     st->codec->bit_rate = frame_size * 1/av_q2d(st->codec->time_base) * 8;
271
272     return 0;
273  fail:
274     if (video_fd >= 0)
275         close(video_fd);
276     av_free(st);
277     return AVERROR_IO;
278 }
279
280 static int v4l_mm_read_picture(VideoData *s, uint8_t *buf)
281 {
282     uint8_t *ptr;
283
284     while (ioctl(s->fd, VIDIOCSYNC, &s->gb_frame) < 0 &&
285            (errno == EAGAIN || errno == EINTR));
286
287     ptr = s->video_buf + s->gb_buffers.offsets[s->gb_frame];
288     memcpy(buf, ptr, s->frame_size);
289
290     /* Setup to capture the next frame */
291     s->gb_buf.frame = s->gb_frame;
292     if (ioctl(s->fd, VIDIOCMCAPTURE, &s->gb_buf) < 0) {
293         if (errno == EAGAIN)
294             av_log(NULL, AV_LOG_ERROR, "Cannot Sync\n");
295         else
296             perror("VIDIOCMCAPTURE");
297         return AVERROR_IO;
298     }
299
300     /* This is now the grabbing frame */
301     s->gb_frame = (s->gb_frame + 1) % s->gb_buffers.frames;
302
303     return s->frame_size;
304 }
305
306 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
307 {
308     VideoData *s = s1->priv_data;
309     int64_t curtime, delay;
310     struct timespec ts;
311
312     /* Calculate the time of the next frame */
313     s->time_frame += int64_t_C(1000000);
314
315     /* wait based on the frame rate */
316     for(;;) {
317         curtime = av_gettime();
318         delay = s->time_frame  * s->frame_rate_base / s->frame_rate - curtime;
319         if (delay <= 0) {
320             if (delay < int64_t_C(-1000000) * s->frame_rate_base / s->frame_rate) {
321                 /* printf("grabbing is %d frames late (dropping)\n", (int) -(delay / 16666)); */
322                 s->time_frame += int64_t_C(1000000);
323             }
324             break;
325         }
326         ts.tv_sec = delay / 1000000;
327         ts.tv_nsec = (delay % 1000000) * 1000;
328         nanosleep(&ts, NULL);
329     }
330
331     if (av_new_packet(pkt, s->frame_size) < 0)
332         return AVERROR_IO;
333
334     pkt->pts = curtime & ((1LL << 48) - 1);
335
336     /* read one frame */
337     if (s->aiw_enabled) {
338         return aiw_read_picture(s, pkt->data);
339     } else if (s->use_mmap) {
340         return v4l_mm_read_picture(s, pkt->data);
341     } else {
342         if (read(s->fd, pkt->data, pkt->size) != pkt->size)
343             return AVERROR_IO;
344         return s->frame_size;
345     }
346 }
347
348 static int grab_read_close(AVFormatContext *s1)
349 {
350     VideoData *s = s1->priv_data;
351
352     if (s->aiw_enabled)
353         aiw_close(s);
354
355     if (s->use_mmap)
356         munmap(s->video_buf, s->gb_buffers.size);
357
358     /* mute audio. we must force it because the BTTV driver does not
359        return its state correctly */
360     s->audio_saved.flags |= VIDEO_AUDIO_MUTE;
361     ioctl(s->fd, VIDIOCSAUDIO, &s->audio_saved);
362
363     close(s->fd);
364     return 0;
365 }
366
367 static AVInputFormat video_grab_device_format = {
368     "video4linux",
369     "video grab",
370     sizeof(VideoData),
371     NULL,
372     grab_read_header,
373     grab_read_packet,
374     grab_read_close,
375     .flags = AVFMT_NOFILE,
376 };
377
378 /* All in Wonder specific stuff */
379 /* XXX: remove and merge in libavcodec/imgconvert.c */
380
381 static int aiw_init(VideoData *s)
382 {
383     int width, height;
384
385     width = s->width;
386     height = s->height;
387
388     if ((width == s->video_cap.maxwidth && height == s->video_cap.maxheight) ||
389         (width == s->video_cap.maxwidth && height == s->video_cap.maxheight*2) ||
390         (width == s->video_cap.maxwidth/2 && height == s->video_cap.maxheight)) {
391
392         s->deint=0;
393         s->halfw=0;
394         if (height == s->video_cap.maxheight*2) s->deint=1;
395         if (width == s->video_cap.maxwidth/2) s->halfw=1;
396     } else {
397         av_log(NULL, AV_LOG_ERROR, "\nIncorrect Grab Size Supplied - Supported Sizes Are:\n");
398         av_log(NULL, AV_LOG_ERROR, " %dx%d  %dx%d %dx%d\n\n",
399                 s->video_cap.maxwidth,s->video_cap.maxheight,
400                 s->video_cap.maxwidth,s->video_cap.maxheight*2,
401                 s->video_cap.maxwidth/2,s->video_cap.maxheight);
402         goto fail;
403     }
404
405     if (s->halfw == 0) {
406         s->src_mem = av_malloc(s->width*2);
407     } else {
408         s->src_mem = av_malloc(s->width*4);
409     }
410     if (!s->src_mem) goto fail;
411
412     s->lum_m4_mem = av_malloc(s->width);
413     if (!s->lum_m4_mem)
414         goto fail;
415     return 0;
416  fail:
417     av_freep(&s->src_mem);
418     av_freep(&s->lum_m4_mem);
419     return -1;
420 }
421
422 #ifdef HAVE_MMX
423 #include "libavcodec/i386/mmx.h"
424
425 #define LINE_WITH_UV \
426                     movq_m2r(ptr[0],mm0); \
427                     movq_m2r(ptr[8],mm1);  \
428                     movq_r2r(mm0, mm4); \
429                     punpcklbw_r2r(mm1,mm0); \
430                     punpckhbw_r2r(mm1,mm4); \
431                     movq_r2r(mm0,mm5); \
432                     punpcklbw_r2r(mm4,mm0); \
433                     punpckhbw_r2r(mm4,mm5); \
434                     movq_r2r(mm0,mm1); \
435                     punpcklbw_r2r(mm5,mm1); \
436                     movq_r2m(mm1,lum[0]); \
437                     movq_m2r(ptr[16],mm2); \
438                     movq_m2r(ptr[24],mm1); \
439                     movq_r2r(mm2,mm4); \
440                     punpcklbw_r2r(mm1,mm2); \
441                     punpckhbw_r2r(mm1,mm4); \
442                     movq_r2r(mm2,mm3); \
443                     punpcklbw_r2r(mm4,mm2); \
444                     punpckhbw_r2r(mm4,mm3); \
445                     movq_r2r(mm2,mm1); \
446                     punpcklbw_r2r(mm3,mm1); \
447                     movq_r2m(mm1,lum[8]); \
448                     punpckhdq_r2r(mm2,mm0); \
449                     punpckhdq_r2r(mm3,mm5); \
450                     movq_r2m(mm0,cb[0]); \
451                     movq_r2m(mm5,cr[0]);
452
453 #define LINE_NO_UV \
454                     movq_m2r(ptr[0],mm0);\
455                     movq_m2r(ptr[8],mm1);\
456                     movq_r2r(mm0, mm4);\
457                     punpcklbw_r2r(mm1,mm0); \
458                     punpckhbw_r2r(mm1,mm4);\
459                     movq_r2r(mm0,mm5);\
460                     punpcklbw_r2r(mm4,mm0);\
461                     punpckhbw_r2r(mm4,mm5);\
462                     movq_r2r(mm0,mm1);\
463                     punpcklbw_r2r(mm5,mm1);\
464                     movq_r2m(mm1,lum[0]);\
465                     movq_m2r(ptr[16],mm2);\
466                     movq_m2r(ptr[24],mm1);\
467                     movq_r2r(mm2,mm4);\
468                     punpcklbw_r2r(mm1,mm2);\
469                     punpckhbw_r2r(mm1,mm4);\
470                     movq_r2r(mm2,mm3);\
471                     punpcklbw_r2r(mm4,mm2);\
472                     punpckhbw_r2r(mm4,mm3);\
473                     movq_r2r(mm2,mm1);\
474                     punpcklbw_r2r(mm3,mm1);\
475                     movq_r2m(mm1,lum[8]);
476
477 #define LINE_WITHUV_AVG \
478                     movq_m2r(ptr[0], mm0);\
479                     movq_m2r(ptr[8], mm1);\
480                     movq_r2r(mm0, mm4);\
481                     punpcklbw_r2r(mm1,mm0);\
482                     punpckhbw_r2r(mm1,mm4);\
483                     movq_r2r(mm0,mm5);\
484                     punpcklbw_r2r(mm4,mm0);\
485                     punpckhbw_r2r(mm4,mm5);\
486                     movq_r2r(mm0,mm1);\
487                     movq_r2r(mm5,mm2);\
488                     punpcklbw_r2r(mm7,mm1);\
489                     punpcklbw_r2r(mm7,mm2);\
490                     paddw_r2r(mm6,mm1);\
491                     paddw_r2r(mm2,mm1);\
492                     psraw_i2r(1,mm1);\
493                     packuswb_r2r(mm7,mm1);\
494                     movd_r2m(mm1,lum[0]);\
495                     movq_m2r(ptr[16],mm2);\
496                     movq_m2r(ptr[24],mm1);\
497                     movq_r2r(mm2,mm4);\
498                     punpcklbw_r2r(mm1,mm2);\
499                     punpckhbw_r2r(mm1,mm4);\
500                     movq_r2r(mm2,mm3);\
501                     punpcklbw_r2r(mm4,mm2);\
502                     punpckhbw_r2r(mm4,mm3);\
503                     movq_r2r(mm2,mm1);\
504                     movq_r2r(mm3,mm4);\
505                     punpcklbw_r2r(mm7,mm1);\
506                     punpcklbw_r2r(mm7,mm4);\
507                     paddw_r2r(mm6,mm1);\
508                     paddw_r2r(mm4,mm1);\
509                     psraw_i2r(1,mm1);\
510                     packuswb_r2r(mm7,mm1);\
511                     movd_r2m(mm1,lum[4]);\
512                     punpckhbw_r2r(mm7,mm0);\
513                     punpckhbw_r2r(mm7,mm2);\
514                     paddw_r2r(mm6,mm0);\
515                     paddw_r2r(mm2,mm0);\
516                     psraw_i2r(1,mm0);\
517                     packuswb_r2r(mm7,mm0);\
518                     punpckhbw_r2r(mm7,mm5);\
519                     punpckhbw_r2r(mm7,mm3);\
520                     paddw_r2r(mm6,mm5);\
521                     paddw_r2r(mm3,mm5);\
522                     psraw_i2r(1,mm5);\
523                     packuswb_r2r(mm7,mm5);\
524                     movd_r2m(mm0,cb[0]);\
525                     movd_r2m(mm5,cr[0]);
526
527 #define LINE_NOUV_AVG \
528                     movq_m2r(ptr[0],mm0);\
529                     movq_m2r(ptr[8],mm1);\
530                     pand_r2r(mm5,mm0);\
531                     pand_r2r(mm5,mm1);\
532                     pmaddwd_r2r(mm6,mm0);\
533                     pmaddwd_r2r(mm6,mm1);\
534                     packssdw_r2r(mm1,mm0);\
535                     paddw_r2r(mm6,mm0);\
536                     psraw_i2r(1,mm0);\
537                     movq_m2r(ptr[16],mm2);\
538                     movq_m2r(ptr[24],mm3);\
539                     pand_r2r(mm5,mm2);\
540                     pand_r2r(mm5,mm3);\
541                     pmaddwd_r2r(mm6,mm2);\
542                     pmaddwd_r2r(mm6,mm3);\
543                     packssdw_r2r(mm3,mm2);\
544                     paddw_r2r(mm6,mm2);\
545                     psraw_i2r(1,mm2);\
546                     packuswb_r2r(mm2,mm0);\
547                     movq_r2m(mm0,lum[0]);
548
549 #define DEINT_LINE_LUM(ptroff) \
550                     movd_m2r(lum_m4[(ptroff)],mm0);\
551                     movd_m2r(lum_m3[(ptroff)],mm1);\
552                     movd_m2r(lum_m2[(ptroff)],mm2);\
553                     movd_m2r(lum_m1[(ptroff)],mm3);\
554                     movd_m2r(lum[(ptroff)],mm4);\
555                     punpcklbw_r2r(mm7,mm0);\
556                     movd_r2m(mm2,lum_m4[(ptroff)]);\
557                     punpcklbw_r2r(mm7,mm1);\
558                     punpcklbw_r2r(mm7,mm2);\
559                     punpcklbw_r2r(mm7,mm3);\
560                     punpcklbw_r2r(mm7,mm4);\
561                     psllw_i2r(2,mm1);\
562                     psllw_i2r(1,mm2);\
563                     paddw_r2r(mm6,mm1);\
564                     psllw_i2r(2,mm3);\
565                     paddw_r2r(mm2,mm1);\
566                     paddw_r2r(mm4,mm0);\
567                     paddw_r2r(mm3,mm1);\
568                     psubusw_r2r(mm0,mm1);\
569                     psrlw_i2r(3,mm1);\
570                     packuswb_r2r(mm7,mm1);\
571                     movd_r2m(mm1,lum_m2[(ptroff)]);
572
573 #else
574 #include "libavcodec/dsputil.h"
575
576 #define LINE_WITH_UV \
577                     lum[0]=ptr[0];lum[1]=ptr[2];lum[2]=ptr[4];lum[3]=ptr[6];\
578                     cb[0]=ptr[1];cb[1]=ptr[5];\
579                     cr[0]=ptr[3];cr[1]=ptr[7];\
580                     lum[4]=ptr[8];lum[5]=ptr[10];lum[6]=ptr[12];lum[7]=ptr[14];\
581                     cb[2]=ptr[9];cb[3]=ptr[13];\
582                     cr[2]=ptr[11];cr[3]=ptr[15];\
583                     lum[8]=ptr[16];lum[9]=ptr[18];lum[10]=ptr[20];lum[11]=ptr[22];\
584                     cb[4]=ptr[17];cb[5]=ptr[21];\
585                     cr[4]=ptr[19];cr[5]=ptr[23];\
586                     lum[12]=ptr[24];lum[13]=ptr[26];lum[14]=ptr[28];lum[15]=ptr[30];\
587                     cb[6]=ptr[25];cb[7]=ptr[29];\
588                     cr[6]=ptr[27];cr[7]=ptr[31];
589
590 #define LINE_NO_UV \
591                     lum[0]=ptr[0];lum[1]=ptr[2];lum[2]=ptr[4];lum[3]=ptr[6];\
592                     lum[4]=ptr[8];lum[5]=ptr[10];lum[6]=ptr[12];lum[7]=ptr[14];\
593                     lum[8]=ptr[16];lum[9]=ptr[18];lum[10]=ptr[20];lum[11]=ptr[22];\
594                     lum[12]=ptr[24];lum[13]=ptr[26];lum[14]=ptr[28];lum[15]=ptr[30];
595
596 #define LINE_WITHUV_AVG \
597                     sum=(ptr[0]+ptr[2]+1) >> 1;lum[0]=sum; \
598                     sum=(ptr[4]+ptr[6]+1) >> 1;lum[1]=sum; \
599                     sum=(ptr[1]+ptr[5]+1) >> 1;cb[0]=sum; \
600                     sum=(ptr[3]+ptr[7]+1) >> 1;cr[0]=sum; \
601                     sum=(ptr[8]+ptr[10]+1) >> 1;lum[2]=sum; \
602                     sum=(ptr[12]+ptr[14]+1) >> 1;lum[3]=sum; \
603                     sum=(ptr[9]+ptr[13]+1) >> 1;cb[1]=sum; \
604                     sum=(ptr[11]+ptr[15]+1) >> 1;cr[1]=sum; \
605                     sum=(ptr[16]+ptr[18]+1) >> 1;lum[4]=sum; \
606                     sum=(ptr[20]+ptr[22]+1) >> 1;lum[5]=sum; \
607                     sum=(ptr[17]+ptr[21]+1) >> 1;cb[2]=sum; \
608                     sum=(ptr[19]+ptr[23]+1) >> 1;cr[2]=sum; \
609                     sum=(ptr[24]+ptr[26]+1) >> 1;lum[6]=sum; \
610                     sum=(ptr[28]+ptr[30]+1) >> 1;lum[7]=sum; \
611                     sum=(ptr[25]+ptr[29]+1) >> 1;cb[3]=sum; \
612                     sum=(ptr[27]+ptr[31]+1) >> 1;cr[3]=sum;
613
614 #define LINE_NOUV_AVG \
615                     sum=(ptr[0]+ptr[2]+1) >> 1;lum[0]=sum; \
616                     sum=(ptr[4]+ptr[6]+1) >> 1;lum[1]=sum; \
617                     sum=(ptr[8]+ptr[10]+1) >> 1;lum[2]=sum; \
618                     sum=(ptr[12]+ptr[14]+1) >> 1;lum[3]=sum; \
619                     sum=(ptr[16]+ptr[18]+1) >> 1;lum[4]=sum; \
620                     sum=(ptr[20]+ptr[22]+1) >> 1;lum[5]=sum; \
621                     sum=(ptr[24]+ptr[26]+1) >> 1;lum[6]=sum; \
622                     sum=(ptr[28]+ptr[30]+1) >> 1;lum[7]=sum;
623
624 #define DEINT_LINE_LUM(ptroff) \
625                     sum=(-lum_m4[(ptroff)]+(lum_m3[(ptroff)]<<2)+(lum_m2[(ptroff)]<<1)+(lum_m1[(ptroff)]<<2)-lum[(ptroff)]); \
626                     lum_m4[(ptroff)]=lum_m2[(ptroff)];\
627                     lum_m2[(ptroff)]=cm[(sum+4)>>3];\
628                     sum=(-lum_m4[(ptroff)+1]+(lum_m3[(ptroff)+1]<<2)+(lum_m2[(ptroff)+1]<<1)+(lum_m1[(ptroff)+1]<<2)-lum[(ptroff)+1]); \
629                     lum_m4[(ptroff)+1]=lum_m2[(ptroff)+1];\
630                     lum_m2[(ptroff)+1]=cm[(sum+4)>>3];\
631                     sum=(-lum_m4[(ptroff)+2]+(lum_m3[(ptroff)+2]<<2)+(lum_m2[(ptroff)+2]<<1)+(lum_m1[(ptroff)+2]<<2)-lum[(ptroff)+2]); \
632                     lum_m4[(ptroff)+2]=lum_m2[(ptroff)+2];\
633                     lum_m2[(ptroff)+2]=cm[(sum+4)>>3];\
634                     sum=(-lum_m4[(ptroff)+3]+(lum_m3[(ptroff)+3]<<2)+(lum_m2[(ptroff)+3]<<1)+(lum_m1[(ptroff)+3]<<2)-lum[(ptroff)+3]); \
635                     lum_m4[(ptroff)+3]=lum_m2[(ptroff)+3];\
636                     lum_m2[(ptroff)+3]=cm[(sum+4)>>3];
637
638 #endif
639
640
641 /* Read two fields separately. */
642 static int aiw_read_picture(VideoData *s, uint8_t *data)
643 {
644     uint8_t *ptr, *lum, *cb, *cr;
645     int h;
646 #ifndef HAVE_MMX
647     int sum;
648 #endif
649     uint8_t* src = s->src_mem;
650     uint8_t *ptrend = &src[s->width*2];
651     lum=data;
652     cb=&lum[s->width*s->height];
653     cr=&cb[(s->width*s->height)/4];
654     if (s->deint == 0 && s->halfw == 0) {
655         while (read(s->fd,src,s->width*2) < 0) {
656             usleep(100);
657         }
658         for (h = 0; h < s->height-2; h+=2) {
659             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
660                 LINE_WITH_UV
661                     }
662             read(s->fd,src,s->width*2);
663             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
664                 LINE_NO_UV
665                     }
666             read(s->fd,src,s->width*2);
667         }
668         /*
669          * Do last two lines
670          */
671         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
672             LINE_WITH_UV
673                 }
674         read(s->fd,src,s->width*2);
675         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
676             LINE_NO_UV
677                 }
678         /* drop second field */
679         while (read(s->fd,src,s->width*2) < 0) {
680             usleep(100);
681         }
682         for (h = 0; h < s->height - 1; h++) {
683             read(s->fd,src,s->width*2);
684         }
685     } else if (s->halfw == 1) {
686 #ifdef HAVE_MMX
687         mmx_t rounder;
688         mmx_t masker;
689         rounder.uw[0]=1;
690         rounder.uw[1]=1;
691         rounder.uw[2]=1;
692         rounder.uw[3]=1;
693         masker.ub[0]=0xff;
694         masker.ub[1]=0;
695         masker.ub[2]=0xff;
696         masker.ub[3]=0;
697         masker.ub[4]=0xff;
698         masker.ub[5]=0;
699         masker.ub[6]=0xff;
700         masker.ub[7]=0;
701         pxor_r2r(mm7,mm7);
702         movq_m2r(rounder,mm6);
703 #endif
704         while (read(s->fd,src,s->width*4) < 0) {
705             usleep(100);
706         }
707         ptrend = &src[s->width*4];
708         for (h = 0; h < s->height-2; h+=2) {
709             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {
710                 LINE_WITHUV_AVG
711                     }
712             read(s->fd,src,s->width*4);
713 #ifdef HAVE_MMX
714             movq_m2r(masker,mm5);
715 #endif
716             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {
717                 LINE_NOUV_AVG
718                     }
719             read(s->fd,src,s->width*4);
720         }
721         /*
722  * Do last two lines
723  */
724         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {
725             LINE_WITHUV_AVG
726                 }
727         read(s->fd,src,s->width*4);
728 #ifdef HAVE_MMX
729         movq_m2r(masker,mm5);
730 #endif
731         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {
732             LINE_NOUV_AVG
733                 }
734         /* drop second field */
735         while (read(s->fd,src,s->width*4) < 0) {
736             usleep(100);
737         }
738         for (h = 0; h < s->height - 1; h++) {
739             read(s->fd,src,s->width*4);
740         }
741     } else {
742         uint8_t *lum_m1, *lum_m2, *lum_m3, *lum_m4;
743 #ifdef HAVE_MMX
744         mmx_t rounder;
745         rounder.uw[0]=4;
746         rounder.uw[1]=4;
747         rounder.uw[2]=4;
748         rounder.uw[3]=4;
749         movq_m2r(rounder,mm6);
750         pxor_r2r(mm7,mm7);
751 #else
752         uint8_t *cm = cropTbl + MAX_NEG_CROP;
753 #endif
754
755         /* read two fields and deinterlace them */
756         while (read(s->fd,src,s->width*2) < 0) {
757             usleep(100);
758         }
759         for (h = 0; h < (s->height/2)-2; h+=2) {
760             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
761                 LINE_WITH_UV
762                     }
763             read(s->fd,src,s->width*2);
764             /* skip a luminance line - will be filled in later */
765             lum += s->width;
766             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
767                 LINE_WITH_UV
768                     }
769             /* skip a luminance line - will be filled in later */
770             lum += s->width;
771             read(s->fd,src,s->width*2);
772         }
773         /*
774  * Do last two lines
775  */
776         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
777             LINE_WITH_UV
778                 }
779         /* skip a luminance line - will be filled in later */
780         lum += s->width;
781         read(s->fd,src,s->width*2);
782         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
783             LINE_WITH_UV
784                 }
785         /*
786  *
787  * SECOND FIELD
788  *
789  */
790         lum=&data[s->width];
791         while (read(s->fd,src,s->width*2) < 0) {
792             usleep(10);
793         }
794         /* First (and last) two lines not interlaced */
795         for (h = 0; h < 2; h++) {
796             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
797                 LINE_NO_UV
798                     }
799             read(s->fd,src,s->width*2);
800             /* skip a luminance line */
801             lum += s->width;
802         }
803         lum_m1=&lum[-s->width];
804         lum_m2=&lum_m1[-s->width];
805         lum_m3=&lum_m2[-s->width];
806         memmove(s->lum_m4_mem,&lum_m3[-s->width],s->width);
807         for (; h < (s->height/2)-1; h++) {
808             lum_m4=s->lum_m4_mem;
809             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16,lum_m1+=16,lum_m2+=16,lum_m3+=16,lum_m4+=16) {
810                 LINE_NO_UV
811
812                     DEINT_LINE_LUM(0)
813                     DEINT_LINE_LUM(4)
814                     DEINT_LINE_LUM(8)
815                     DEINT_LINE_LUM(12)
816                     }
817             read(s->fd,src,s->width*2);
818             /* skip a luminance line */
819             lum += s->width;
820             lum_m1 += s->width;
821             lum_m2 += s->width;
822             lum_m3 += s->width;
823             //                lum_m4 += s->width;
824         }
825         /*
826  * Do last line
827  */
828         lum_m4=s->lum_m4_mem;
829         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, lum_m1+=16, lum_m2+=16, lum_m3+=16, lum_m4+=16) {
830             LINE_NO_UV
831
832                 DEINT_LINE_LUM(0)
833                 DEINT_LINE_LUM(4)
834                 DEINT_LINE_LUM(8)
835                 DEINT_LINE_LUM(12)
836                 }
837     }
838 #ifdef HAVE_MMX
839     emms();
840 #endif
841     return s->frame_size;
842 }
843
844 static int aiw_close(VideoData *s)
845 {
846     av_freep(&s->lum_m4_mem);
847     av_freep(&s->src_mem);
848     return 0;
849 }
850
851 int video_grab_init(void)
852 {
853     av_register_input_format(&video_grab_device_format);
854     return 0;
855 }