git.sesse.net Git - ffmpeg/blob - 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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->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, 64, 1, 1000000); /* 64 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;
 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 }