2 * Linux video grab interface
3 * Copyright (c) 2000,2001 Fabrice Bellard.
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.
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.
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
22 #include <sys/ioctl.h>
25 #define _LINUX_TIME_H 1
26 #include <linux/videodev.h>
31 int frame_format; /* see VIDEO_PALETTE_xxx */
38 struct video_capability video_cap;
39 struct video_audio audio_saved;
41 struct video_mbuf gb_buffers;
42 struct video_mmap gb_buf;
45 /* ATI All In Wonder specific stuff */
46 /* XXX: remove and merge in libavcodec/imgconvert.c */
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);
58 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
60 VideoData *s = s1->priv_data;
63 int video_fd, frame_size;
64 int ret, frame_rate, frame_rate_base;
66 struct video_tuner tuner;
67 struct video_audio audio;
68 const char *video_device;
71 if (!ap || ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0)
76 frame_rate = ap->time_base.den;
77 frame_rate_base = ap->time_base.num;
79 if((unsigned)width > 32767 || (unsigned)height > 32767)
82 st = av_new_stream(s1, 0);
85 av_set_pts_info(st, 48, 1, 1000000); /* 48 bits pts in us */
89 s->frame_rate = frame_rate;
90 s->frame_rate_base = frame_rate_base;
92 video_device = ap->device;
94 video_device = "/dev/video";
95 video_fd = open(video_device, O_RDWR);
101 if (ioctl(video_fd,VIDIOCGCAP, &s->video_cap) < 0) {
102 perror("VIDIOCGCAP");
106 if (!(s->video_cap.type & VID_TYPE_CAPTURE)) {
107 av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not handle capture\n");
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;
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;
127 tuner.mode = VIDEO_MODE_NTSC;
128 ioctl(video_fd, VIDIOCSTUNER, &tuner);
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);
138 ret = ioctl(video_fd,VIDIOCGMBUF,&s->gb_buffers);
140 /* try to use read based access */
141 struct video_window win;
142 struct video_picture pict;
152 ioctl(video_fd, VIDIOCSWIN, &win);
154 ioctl(video_fd, VIDIOCGPICT, &pict);
156 printf("v4l: colour=%d hue=%d brightness=%d constrast=%d whiteness=%d\n",
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);
169 pict.palette=VIDEO_PALETTE_YUV422;
170 ret = ioctl(video_fd, VIDIOCSPICT, &pict);
172 pict.palette=VIDEO_PALETTE_RGB24;
173 ret = ioctl(video_fd, VIDIOCSPICT, &pict);
180 s->frame_format = pict.palette;
183 ioctl(video_fd, VIDIOCCAPTURE, &val);
185 s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;
188 /* ATI All In Wonder automatic activation */
189 if (!strcmp(s->video_cap.name, "Km")) {
193 /* force 420P format because convertion from YUV422 to YUV420P
194 is done in this driver (ugly) */
195 s->frame_format = VIDEO_PALETTE_YUV420P;
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) {
204 s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;
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;
212 if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf)) < 0) {
213 s->gb_buf.format = VIDEO_PALETTE_YUV420P;
215 ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
216 if (ret < 0 && errno != EAGAIN) {
218 s->gb_buf.format = VIDEO_PALETTE_YUV422;
220 ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
221 if (ret < 0 && errno != EAGAIN) {
223 s->gb_buf.format = VIDEO_PALETTE_RGB24;
224 ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
229 if (errno != EAGAIN) {
231 av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not support suitable format\n");
233 av_log(s1, AV_LOG_ERROR,"Fatal: grab device does not receive any video signal\n");
237 for (j = 1; j < s->gb_buffers.frames; j++) {
239 ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);
241 s->frame_format = s->gb_buf.format;
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;
250 case VIDEO_PALETTE_YUV422:
251 frame_size = width * height * 2;
252 st->codec->pix_fmt = PIX_FMT_YUV422;
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 ! */
262 s->frame_size = frame_size;
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;
280 static int v4l_mm_read_picture(VideoData *s, uint8_t *buf)
284 while (ioctl(s->fd, VIDIOCSYNC, &s->gb_frame) < 0 &&
285 (errno == EAGAIN || errno == EINTR));
287 ptr = s->video_buf + s->gb_buffers.offsets[s->gb_frame];
288 memcpy(buf, ptr, s->frame_size);
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) {
294 av_log(NULL, AV_LOG_ERROR, "Cannot Sync\n");
296 perror("VIDIOCMCAPTURE");
300 /* This is now the grabbing frame */
301 s->gb_frame = (s->gb_frame + 1) % s->gb_buffers.frames;
303 return s->frame_size;
306 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
308 VideoData *s = s1->priv_data;
309 int64_t curtime, delay;
312 /* Calculate the time of the next frame */
313 s->time_frame += int64_t_C(1000000);
315 /* wait based on the frame rate */
317 curtime = av_gettime();
318 delay = s->time_frame * s->frame_rate_base / s->frame_rate - curtime;
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);
326 ts.tv_sec = delay / 1000000;
327 ts.tv_nsec = (delay % 1000000) * 1000;
328 nanosleep(&ts, NULL);
331 if (av_new_packet(pkt, s->frame_size) < 0)
334 pkt->pts = curtime & ((1LL << 48) - 1);
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);
342 if (read(s->fd, pkt->data, pkt->size) != pkt->size)
344 return s->frame_size;
348 static int grab_read_close(AVFormatContext *s1)
350 VideoData *s = s1->priv_data;
356 munmap(s->video_buf, s->gb_buffers.size);
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);
367 static AVInputFormat video_grab_device_format = {
375 .flags = AVFMT_NOFILE,
378 /* All in Wonder specific stuff */
379 /* XXX: remove and merge in libavcodec/imgconvert.c */
381 static int aiw_init(VideoData *s)
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)) {
394 if (height == s->video_cap.maxheight*2) s->deint=1;
395 if (width == s->video_cap.maxwidth/2) s->halfw=1;
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);
406 s->src_mem = av_malloc(s->width*2);
408 s->src_mem = av_malloc(s->width*4);
410 if (!s->src_mem) goto fail;
412 s->lum_m4_mem = av_malloc(s->width);
417 av_freep(&s->src_mem);
418 av_freep(&s->lum_m4_mem);
423 #include "libavcodec/i386/mmx.h"
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); \
432 punpcklbw_r2r(mm4,mm0); \
433 punpckhbw_r2r(mm4,mm5); \
435 punpcklbw_r2r(mm5,mm1); \
436 movq_r2m(mm1,lum[0]); \
437 movq_m2r(ptr[16],mm2); \
438 movq_m2r(ptr[24],mm1); \
440 punpcklbw_r2r(mm1,mm2); \
441 punpckhbw_r2r(mm1,mm4); \
443 punpcklbw_r2r(mm4,mm2); \
444 punpckhbw_r2r(mm4,mm3); \
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]); \
454 movq_m2r(ptr[0],mm0);\
455 movq_m2r(ptr[8],mm1);\
457 punpcklbw_r2r(mm1,mm0); \
458 punpckhbw_r2r(mm1,mm4);\
460 punpcklbw_r2r(mm4,mm0);\
461 punpckhbw_r2r(mm4,mm5);\
463 punpcklbw_r2r(mm5,mm1);\
464 movq_r2m(mm1,lum[0]);\
465 movq_m2r(ptr[16],mm2);\
466 movq_m2r(ptr[24],mm1);\
468 punpcklbw_r2r(mm1,mm2);\
469 punpckhbw_r2r(mm1,mm4);\
471 punpcklbw_r2r(mm4,mm2);\
472 punpckhbw_r2r(mm4,mm3);\
474 punpcklbw_r2r(mm3,mm1);\
475 movq_r2m(mm1,lum[8]);
477 #define LINE_WITHUV_AVG \
478 movq_m2r(ptr[0], mm0);\
479 movq_m2r(ptr[8], mm1);\
481 punpcklbw_r2r(mm1,mm0);\
482 punpckhbw_r2r(mm1,mm4);\
484 punpcklbw_r2r(mm4,mm0);\
485 punpckhbw_r2r(mm4,mm5);\
488 punpcklbw_r2r(mm7,mm1);\
489 punpcklbw_r2r(mm7,mm2);\
493 packuswb_r2r(mm7,mm1);\
494 movd_r2m(mm1,lum[0]);\
495 movq_m2r(ptr[16],mm2);\
496 movq_m2r(ptr[24],mm1);\
498 punpcklbw_r2r(mm1,mm2);\
499 punpckhbw_r2r(mm1,mm4);\
501 punpcklbw_r2r(mm4,mm2);\
502 punpckhbw_r2r(mm4,mm3);\
505 punpcklbw_r2r(mm7,mm1);\
506 punpcklbw_r2r(mm7,mm4);\
510 packuswb_r2r(mm7,mm1);\
511 movd_r2m(mm1,lum[4]);\
512 punpckhbw_r2r(mm7,mm0);\
513 punpckhbw_r2r(mm7,mm2);\
517 packuswb_r2r(mm7,mm0);\
518 punpckhbw_r2r(mm7,mm5);\
519 punpckhbw_r2r(mm7,mm3);\
523 packuswb_r2r(mm7,mm5);\
524 movd_r2m(mm0,cb[0]);\
527 #define LINE_NOUV_AVG \
528 movq_m2r(ptr[0],mm0);\
529 movq_m2r(ptr[8],mm1);\
532 pmaddwd_r2r(mm6,mm0);\
533 pmaddwd_r2r(mm6,mm1);\
534 packssdw_r2r(mm1,mm0);\
537 movq_m2r(ptr[16],mm2);\
538 movq_m2r(ptr[24],mm3);\
541 pmaddwd_r2r(mm6,mm2);\
542 pmaddwd_r2r(mm6,mm3);\
543 packssdw_r2r(mm3,mm2);\
546 packuswb_r2r(mm2,mm0);\
547 movq_r2m(mm0,lum[0]);
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);\
568 psubusw_r2r(mm0,mm1);\
570 packuswb_r2r(mm7,mm1);\
571 movd_r2m(mm1,lum_m2[(ptroff)]);
574 #include "libavcodec/dsputil.h"
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];
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];
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;
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;
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];
641 /* Read two fields separately. */
642 static int aiw_read_picture(VideoData *s, uint8_t *data)
644 uint8_t *ptr, *lum, *cb, *cr;
649 uint8_t* src = s->src_mem;
650 uint8_t *ptrend = &src[s->width*2];
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) {
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) {
662 read(s->fd,src,s->width*2);
663 for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
666 read(s->fd,src,s->width*2);
671 for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
674 read(s->fd,src,s->width*2);
675 for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {
678 /* drop second field */
679 while (read(s->fd,src,s->width*2) < 0) {
682 for (h = 0; h < s->height - 1; h++) {
683 read(s->fd,src,s->width*2);
685 } else if (s->halfw == 1) {
702 movq_m2r(rounder,mm6);
704 while (read(s->fd,src,s->width*4) < 0) {
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) {
712 read(s->fd,src,s->width*4);
714 movq_m2r(masker,mm5);
716 for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {
719 read(s->fd,src,s->width*4);
724 for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {
727 read(s->fd,src,s->width*4);
729 movq_m2r(masker,mm5);
731 for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {
734 /* drop second field */
735 while (read(s->fd,src,s->width*4) < 0) {
738 for (h = 0; h < s->height - 1; h++) {
739 read(s->fd,src,s->width*4);
742 uint8_t *lum_m1, *lum_m2, *lum_m3, *lum_m4;
749 movq_m2r(rounder,mm6);
752 uint8_t *cm = cropTbl + MAX_NEG_CROP;
755 /* read two fields and deinterlace them */
756 while (read(s->fd,src,s->width*2) < 0) {
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) {
763 read(s->fd,src,s->width*2);
764 /* skip a luminance line - will be filled in later */
766 for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
769 /* skip a luminance line - will be filled in later */
771 read(s->fd,src,s->width*2);
776 for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
779 /* skip a luminance line - will be filled in later */
781 read(s->fd,src,s->width*2);
782 for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {
791 while (read(s->fd,src,s->width*2) < 0) {
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) {
799 read(s->fd,src,s->width*2);
800 /* skip a luminance line */
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) {
817 read(s->fd,src,s->width*2);
818 /* skip a luminance line */
823 // lum_m4 += s->width;
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) {
841 return s->frame_size;
844 static int aiw_close(VideoData *s)
846 av_freep(&s->lum_m4_mem);
847 av_freep(&s->src_mem);
851 int video_grab_init(void)
853 av_register_input_format(&video_grab_device_format);