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