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FFmpeg/libavformat/grab.c

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  1. /*

  2.  * Linux video grab interface

  3.  * Copyright (c) 2000,2001 Fabrice Bellard.

  4.  *

  5.  * This library is free software; you can redistribute it and/or

  6.  * modify it under the terms of the GNU Lesser General Public

  7.  * License as published by the Free Software Foundation; either

  8.  * version 2 of the License, or (at your option) any later version.

  9.  *

  10.  * This library is distributed in the hope that it will be useful,

  11.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  12.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  13.  * Lesser General Public License for more details.

  14.  *

  15.  * You should have received a copy of the GNU Lesser General Public

  16.  * License along with this library; if not, write to the Free Software

  17.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  18.  */

  19. #include "avformat.h"

  20. #include <unistd.h>

  21. #include <fcntl.h>

  22. #include <sys/ioctl.h>

  23. #include <sys/mman.h>

  24. #include <sys/time.h>

  25. #define _LINUX_TIME_H 1

  26. #include <linux/videodev.h>

  27. #include <time.h>

  28. 

  29. typedef struct {

  30.     int fd;

  31.     int frame_format; /* see VIDEO_PALETTE_xxx */

  32.     int use_mmap;

  33.     int width, height;

  34.     int frame_rate;

  35.     int frame_rate_base;

  36.     int64_t time_frame;

  37.     int frame_size;

  38.     struct video_capability video_cap;

  39.     struct video_audio audio_saved;

  40.     uint8_t *video_buf;

  41.     struct video_mbuf gb_buffers;

  42.     struct video_mmap gb_buf;

  43.     int gb_frame;

  44. 

  45.     /* ATI All In Wonder specific stuff */

  46.     /* XXX: remove and merge in libavcodec/imgconvert.c */

  47.     int aiw_enabled;

  48.     int deint;

  49.     int halfw;

  50.     uint8_t *src_mem;

  51.     uint8_t *lum_m4_mem;

  52. } VideoData;

  53. 

  54. static int aiw_init(VideoData *s);

  55. static int aiw_read_picture(VideoData *s, uint8_t *data);

  56. static int aiw_close(VideoData *s);

  57. 

  58. static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)

  59. {

  60.     VideoData *s = s1->priv_data;

  61.     AVStream *st;

  62.     int width, height;

  63.     int video_fd, frame_size;

  64.     int ret, frame_rate, frame_rate_base;

  65.     int desired_palette;

  66.     struct video_tuner tuner;

  67.     struct video_audio audio;

  68.     const char *video_device;

  69.     int j;

  70. 

  71.     if (!ap || ap->width <= 0 || ap->height <= 0 || ap->frame_rate <= 0)

  72.         return -1;

  73.     

  74.     width = ap->width;

  75.     height = ap->height;

  76.     frame_rate      = ap->frame_rate;

  77.     frame_rate_base = ap->frame_rate_base;

  78. 

  79.     st = av_new_stream(s1, 0);

  80.     if (!st)

  81.         return -ENOMEM;

  82. 

  83.     s->width = width;

  84.     s->height = height;

  85.     s->frame_rate      = frame_rate;

  86.     s->frame_rate_base = frame_rate_base;

  87. 

  88.     video_device = ap->device;

  89.     if (!video_device)

  90.         video_device = "/dev/video";

  91.     video_fd = open(video_device, O_RDWR);

  92.     if (video_fd < 0) {

  93.         perror(video_device);

  94.         goto fail;

  95.     }

  96.     

  97.     if (ioctl(video_fd,VIDIOCGCAP, &s->video_cap) < 0) {

  98.         perror("VIDIOCGCAP");

  99.         goto fail;

  100.     }

  101. 

  102.     if (!(s->video_cap.type & VID_TYPE_CAPTURE)) {

  103. 	av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not handle capture\n");

  104.         goto fail;

  105.     }

  106. 

  107.     desired_palette = -1;

  108.     if (st->codec.pix_fmt == PIX_FMT_YUV420P) {

  109.         desired_palette = VIDEO_PALETTE_YUV420P;

  110.     } else if (st->codec.pix_fmt == PIX_FMT_YUV422) {

  111.         desired_palette = VIDEO_PALETTE_YUV422;

  112.     } else if (st->codec.pix_fmt == PIX_FMT_BGR24) {

  113.         desired_palette = VIDEO_PALETTE_RGB24;

  114.     }    

  115. 

  116.     /* set tv standard */

  117.     if (ap->standard && !ioctl(video_fd, VIDIOCGTUNER, &tuner)) {

  118. 	if (!strcasecmp(ap->standard, "pal"))

  119. 	    tuner.mode = VIDEO_MODE_PAL;

  120. 	else if (!strcasecmp(ap->standard, "secam"))

  121. 	    tuner.mode = VIDEO_MODE_SECAM;

  122. 	else

  123. 	    tuner.mode = VIDEO_MODE_NTSC;

  124. 	ioctl(video_fd, VIDIOCSTUNER, &tuner);

  125.     }

  126.     

  127.     /* unmute audio */

  128.     audio.audio = 0;

  129.     ioctl(video_fd, VIDIOCGAUDIO, &audio);

  130.     memcpy(&s->audio_saved, &audio, sizeof(audio));

  131.     audio.flags &= ~VIDEO_AUDIO_MUTE;

  132.     ioctl(video_fd, VIDIOCSAUDIO, &audio);

  133. 

  134.     ret = ioctl(video_fd,VIDIOCGMBUF,&s->gb_buffers);

  135.     if (ret < 0) {

  136.         /* try to use read based access */

  137.         struct video_window win;

  138.         struct video_picture pict;

  139.         int val;

  140. 

  141.         win.x = 0;

  142.         win.y = 0;

  143.         win.width = width;

  144.         win.height = height;

  145.         win.chromakey = -1;

  146.         win.flags = 0;

  147. 

  148.         ioctl(video_fd, VIDIOCSWIN, &win);

  149. 

  150.         ioctl(video_fd, VIDIOCGPICT, &pict);

  151. #if 0

  152.         printf("v4l: colour=%d hue=%d brightness=%d constrast=%d whiteness=%d\n",

  153.                pict.colour,

  154.                pict.hue,

  155.                pict.brightness,

  156.                pict.contrast,

  157.                pict.whiteness);

  158. #endif        

  159.         /* try to choose a suitable video format */

  160.         pict.palette = desired_palette;

  161.         if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCSPICT, &pict)) < 0) {

  162.             pict.palette=VIDEO_PALETTE_YUV420P;

  163.             ret = ioctl(video_fd, VIDIOCSPICT, &pict);

  164.             if (ret < 0) {

  165.                 pict.palette=VIDEO_PALETTE_YUV422;

  166.                 ret = ioctl(video_fd, VIDIOCSPICT, &pict);

  167.                 if (ret < 0) {

  168.                     pict.palette=VIDEO_PALETTE_RGB24;

  169.                     ret = ioctl(video_fd, VIDIOCSPICT, &pict);

  170.                     if (ret < 0) 

  171.                         goto fail1;

  172.                 }

  173.             }

  174.         }

  175. 

  176.         s->frame_format = pict.palette;

  177. 

  178.         val = 1;

  179.         ioctl(video_fd, VIDIOCCAPTURE, &val);

  180. 

  181.         s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;

  182.         s->use_mmap = 0;

  183.         

  184.         /* ATI All In Wonder automatic activation */

  185.         if (!strcmp(s->video_cap.name, "Km")) {

  186.             if (aiw_init(s) < 0)

  187.                 goto fail;

  188.             s->aiw_enabled = 1;

  189.             /* force 420P format because convertion from YUV422 to YUV420P

  190.                is done in this driver (ugly) */

  191.             s->frame_format = VIDEO_PALETTE_YUV420P;

  192.         }

  193.     } else {

  194.         s->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_SHARED,video_fd,0);

  195.         if ((unsigned char*)-1 == s->video_buf) {

  196.             perror("mmap");

  197.             goto fail;

  198.         }

  199.         s->gb_frame = 0;

  200.         s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;

  201.         

  202.         /* start to grab the first frame */

  203.         s->gb_buf.frame = s->gb_frame % s->gb_buffers.frames;

  204.         s->gb_buf.height = height;

  205.         s->gb_buf.width = width;

  206.         s->gb_buf.format = desired_palette;

  207. 

  208.         if (desired_palette == -1 || (ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf)) < 0) {

  209.             s->gb_buf.format = VIDEO_PALETTE_YUV420P;

  210.             

  211.             ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);

  212.             if (ret < 0 && errno != EAGAIN) {

  213.                 /* try YUV422 */

  214.                 s->gb_buf.format = VIDEO_PALETTE_YUV422;

  215.                 

  216.                 ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);

  217.                 if (ret < 0 && errno != EAGAIN) {

  218.                     /* try RGB24 */

  219.                     s->gb_buf.format = VIDEO_PALETTE_RGB24;

  220.                     ret = ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);

  221.                 }

  222.             }

  223.         }

  224.         if (ret < 0) {

  225.             if (errno != EAGAIN) {

  226.             fail1:

  227.                 av_log(s1, AV_LOG_ERROR, "Fatal: grab device does not support suitable format\n");

  228.             } else {

  229.                 av_log(s1, AV_LOG_ERROR,"Fatal: grab device does not receive any video signal\n");

  230.             }

  231.             goto fail;

  232.         }

  233. 	for (j = 1; j < s->gb_buffers.frames; j++) {

  234. 	  s->gb_buf.frame = j;

  235. 	  ioctl(video_fd, VIDIOCMCAPTURE, &s->gb_buf);

  236. 	}

  237.         s->frame_format = s->gb_buf.format;

  238.         s->use_mmap = 1;

  239.     }

  240. 

  241.     switch(s->frame_format) {

  242.     case VIDEO_PALETTE_YUV420P:

  243.         frame_size = (width * height * 3) / 2;

  244.         st->codec.pix_fmt = PIX_FMT_YUV420P;

  245.         break;

  246.     case VIDEO_PALETTE_YUV422:

  247.         frame_size = width * height * 2;

  248.         st->codec.pix_fmt = PIX_FMT_YUV422;

  249.         break;

  250.     case VIDEO_PALETTE_RGB24:

  251.         frame_size = width * height * 3;

  252.         st->codec.pix_fmt = PIX_FMT_BGR24; /* NOTE: v4l uses BGR24, not RGB24 ! */

  253.         break;

  254.     default:

  255.         goto fail;

  256.     }

  257.     s->fd = video_fd;

  258.     s->frame_size = frame_size;

  259.     

  260.     st->codec.codec_type = CODEC_TYPE_VIDEO;

  261.     st->codec.codec_id = CODEC_ID_RAWVIDEO;

  262.     st->codec.width = width;

  263.     st->codec.height = height;

  264.     st->codec.frame_rate      = frame_rate;

  265.     st->codec.frame_rate_base = frame_rate_base;

  266.     

  267.     av_set_pts_info(s1, 48, 1, 1000000); /* 48 bits pts in us */

  268. 

  269.     return 0;

  270.  fail:

  271.     if (video_fd >= 0)

  272.         close(video_fd);

  273.     av_free(st);

  274.     return -EIO;

  275. }

  276. 

  277. static int v4l_mm_read_picture(VideoData *s, uint8_t *buf)

  278. {

  279.     uint8_t *ptr;

  280. 

  281.     while (ioctl(s->fd, VIDIOCSYNC, &s->gb_frame) < 0 &&

  282.            (errno == EAGAIN || errno == EINTR));

  283. 

  284.     ptr = s->video_buf + s->gb_buffers.offsets[s->gb_frame];

  285.     memcpy(buf, ptr, s->frame_size);

  286. 

  287.     /* Setup to capture the next frame */

  288.     s->gb_buf.frame = s->gb_frame;

  289.     if (ioctl(s->fd, VIDIOCMCAPTURE, &s->gb_buf) < 0) {

  290.         if (errno == EAGAIN)

  291.             av_log(NULL, AV_LOG_ERROR, "Cannot Sync\n");

  292.         else

  293.             perror("VIDIOCMCAPTURE");

  294.         return -EIO;

  295.     }

  296. 

  297.     /* This is now the grabbing frame */

  298.     s->gb_frame = (s->gb_frame + 1) % s->gb_buffers.frames;

  299. 

  300.     return s->frame_size;

  301. }

  302. 

  303. static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)

  304. {

  305.     VideoData *s = s1->priv_data;

  306.     int64_t curtime, delay;

  307.     struct timespec ts;

  308. 

  309.     /* Calculate the time of the next frame */

  310.     s->time_frame += int64_t_C(1000000);

  311. 

  312.     /* wait based on the frame rate */

  313.     for(;;) {

  314.         curtime = av_gettime();

  315.         delay = s->time_frame  * s->frame_rate_base / s->frame_rate - curtime;

  316.         if (delay <= 0) {

  317.             if (delay < int64_t_C(-1000000) * s->frame_rate_base / s->frame_rate) {

  318.                 /* printf("grabbing is %d frames late (dropping)\n", (int) -(delay / 16666)); */

  319.                 s->time_frame += int64_t_C(1000000);

  320.             }

  321.             break;

  322.         }    

  323.         ts.tv_sec = delay / 1000000;

  324.         ts.tv_nsec = (delay % 1000000) * 1000;

  325.         nanosleep(&ts, NULL);

  326.     }

  327. 

  328.     if (av_new_packet(pkt, s->frame_size) < 0)

  329.         return -EIO;

  330. 

  331.     pkt->pts = curtime & ((1LL << 48) - 1);

  332. 

  333.     /* read one frame */

  334.     if (s->aiw_enabled) {

  335.         return aiw_read_picture(s, pkt->data);

  336.     } else if (s->use_mmap) {

  337.         return v4l_mm_read_picture(s, pkt->data);

  338.     } else {

  339.         if (read(s->fd, pkt->data, pkt->size) != pkt->size)

  340.             return -EIO;

  341.         return s->frame_size;

  342.     }

  343. }

  344. 

  345. static int grab_read_close(AVFormatContext *s1)

  346. {

  347.     VideoData *s = s1->priv_data;

  348. 

  349.     if (s->aiw_enabled)

  350.         aiw_close(s);

  351. 

  352.     if (s->use_mmap)

  353.         munmap(s->video_buf, s->gb_buffers.size);

  354. 

  355.     /* mute audio. we must force it because the BTTV driver does not

  356.        return its state correctly */

  357.     s->audio_saved.flags |= VIDEO_AUDIO_MUTE;

  358.     ioctl(s->fd, VIDIOCSAUDIO, &s->audio_saved);

  359. 

  360.     close(s->fd);

  361.     return 0;

  362. }

  363. 

  364. static AVInputFormat video_grab_device_format = {

  365.     "video4linux",

  366.     "video grab",

  367.     sizeof(VideoData),

  368.     NULL,

  369.     grab_read_header,

  370.     grab_read_packet,

  371.     grab_read_close,

  372.     .flags = AVFMT_NOFILE,

  373. };

  374. 

  375. /* All in Wonder specific stuff */

  376. /* XXX: remove and merge in libavcodec/imgconvert.c */

  377. 

  378. static int aiw_init(VideoData *s)

  379. {

  380.     int width, height;

  381. 

  382.     width = s->width;

  383.     height = s->height;

  384. 

  385.     if ((width == s->video_cap.maxwidth && height == s->video_cap.maxheight) ||

  386.         (width == s->video_cap.maxwidth && height == s->video_cap.maxheight*2) ||

  387.         (width == s->video_cap.maxwidth/2 && height == s->video_cap.maxheight)) {

  388.         

  389.         s->deint=0;

  390.         s->halfw=0;

  391.         if (height == s->video_cap.maxheight*2) s->deint=1;

  392.         if (width == s->video_cap.maxwidth/2) s->halfw=1;

  393.     } else {

  394.         av_log(NULL, AV_LOG_ERROR, "\nIncorrect Grab Size Supplied - Supported Sizes Are:\n");

  395.         av_log(NULL, AV_LOG_ERROR, " %dx%d  %dx%d %dx%d\n\n",

  396.                 s->video_cap.maxwidth,s->video_cap.maxheight,

  397.                 s->video_cap.maxwidth,s->video_cap.maxheight*2,

  398.                 s->video_cap.maxwidth/2,s->video_cap.maxheight);

  399.         goto fail;

  400.     }

  401. 

  402.     if (s->halfw == 0) {

  403.         s->src_mem = av_malloc(s->width*2);

  404.     } else {

  405.         s->src_mem = av_malloc(s->width*4);

  406.     }

  407.     if (!s->src_mem) goto fail;

  408. 

  409.     s->lum_m4_mem = av_malloc(s->width);

  410.     if (!s->lum_m4_mem)

  411.         goto fail;

  412.     return 0;

  413.  fail:

  414.     av_freep(&s->src_mem);

  415.     av_freep(&s->lum_m4_mem);

  416.     return -1;

  417. }

  418. 

  419. #ifdef HAVE_MMX

  420. #include "../libavcodec/i386/mmx.h"

  421. 

  422. #define LINE_WITH_UV \

  423.                     movq_m2r(ptr[0],mm0); \

  424.                     movq_m2r(ptr[8],mm1);  \

  425.                     movq_r2r(mm0, mm4); \

  426.                     punpcklbw_r2r(mm1,mm0); \

  427.                     punpckhbw_r2r(mm1,mm4); \

  428.                     movq_r2r(mm0,mm5); \

  429.                     punpcklbw_r2r(mm4,mm0); \

  430.                     punpckhbw_r2r(mm4,mm5); \

  431.                     movq_r2r(mm0,mm1); \

  432.                     punpcklbw_r2r(mm5,mm1); \

  433.                     movq_r2m(mm1,lum[0]); \

  434.                     movq_m2r(ptr[16],mm2); \

  435.                     movq_m2r(ptr[24],mm1); \

  436.                     movq_r2r(mm2,mm4); \

  437.                     punpcklbw_r2r(mm1,mm2); \

  438.                     punpckhbw_r2r(mm1,mm4); \

  439.                     movq_r2r(mm2,mm3); \

  440.                     punpcklbw_r2r(mm4,mm2); \

  441.                     punpckhbw_r2r(mm4,mm3); \

  442.                     movq_r2r(mm2,mm1); \

  443.                     punpcklbw_r2r(mm3,mm1); \

  444.                     movq_r2m(mm1,lum[8]); \

  445.                     punpckhdq_r2r(mm2,mm0); \

  446.                     punpckhdq_r2r(mm3,mm5); \

  447.                     movq_r2m(mm0,cb[0]); \

  448.                     movq_r2m(mm5,cr[0]);

  449. 

  450. #define LINE_NO_UV \

  451.                     movq_m2r(ptr[0],mm0);\

  452.                     movq_m2r(ptr[8],mm1);\

  453.                     movq_r2r(mm0, mm4);\

  454.                     punpcklbw_r2r(mm1,mm0); \

  455.                     punpckhbw_r2r(mm1,mm4);\

  456.                     movq_r2r(mm0,mm5);\

  457.                     punpcklbw_r2r(mm4,mm0);\

  458.                     punpckhbw_r2r(mm4,mm5);\

  459.                     movq_r2r(mm0,mm1);\

  460.                     punpcklbw_r2r(mm5,mm1);\

  461.                     movq_r2m(mm1,lum[0]);\

  462.                     movq_m2r(ptr[16],mm2);\

  463.                     movq_m2r(ptr[24],mm1);\

  464.                     movq_r2r(mm2,mm4);\

  465.                     punpcklbw_r2r(mm1,mm2);\

  466.                     punpckhbw_r2r(mm1,mm4);\

  467.                     movq_r2r(mm2,mm3);\

  468.                     punpcklbw_r2r(mm4,mm2);\

  469.                     punpckhbw_r2r(mm4,mm3);\

  470.                     movq_r2r(mm2,mm1);\

  471.                     punpcklbw_r2r(mm3,mm1);\

  472.                     movq_r2m(mm1,lum[8]);

  473. 

  474. #define LINE_WITHUV_AVG \

  475.                     movq_m2r(ptr[0], mm0);\

  476.                     movq_m2r(ptr[8], mm1);\

  477.                     movq_r2r(mm0, mm4);\

  478.                     punpcklbw_r2r(mm1,mm0);\

  479.                     punpckhbw_r2r(mm1,mm4);\

  480.                     movq_r2r(mm0,mm5);\

  481.                     punpcklbw_r2r(mm4,mm0);\

  482.                     punpckhbw_r2r(mm4,mm5);\

  483.                     movq_r2r(mm0,mm1);\

  484.                     movq_r2r(mm5,mm2);\

  485.                     punpcklbw_r2r(mm7,mm1);\

  486.                     punpcklbw_r2r(mm7,mm2);\

  487.                     paddw_r2r(mm6,mm1);\

  488.                     paddw_r2r(mm2,mm1);\

  489.                     psraw_i2r(1,mm1);\

  490.                     packuswb_r2r(mm7,mm1);\

  491.                     movd_r2m(mm1,lum[0]);\

  492.                     movq_m2r(ptr[16],mm2);\

  493.                     movq_m2r(ptr[24],mm1);\

  494.                     movq_r2r(mm2,mm4);\

  495.                     punpcklbw_r2r(mm1,mm2);\

  496.                     punpckhbw_r2r(mm1,mm4);\

  497.                     movq_r2r(mm2,mm3);\

  498.                     punpcklbw_r2r(mm4,mm2);\

  499.                     punpckhbw_r2r(mm4,mm3);\

  500.                     movq_r2r(mm2,mm1);\

  501.                     movq_r2r(mm3,mm4);\

  502.                     punpcklbw_r2r(mm7,mm1);\

  503.                     punpcklbw_r2r(mm7,mm4);\

  504.                     paddw_r2r(mm6,mm1);\

  505.                     paddw_r2r(mm4,mm1);\

  506.                     psraw_i2r(1,mm1);\

  507.                     packuswb_r2r(mm7,mm1);\

  508.                     movd_r2m(mm1,lum[4]);\

  509.                     punpckhbw_r2r(mm7,mm0);\

  510.                     punpckhbw_r2r(mm7,mm2);\

  511.                     paddw_r2r(mm6,mm0);\

  512.                     paddw_r2r(mm2,mm0);\

  513.                     psraw_i2r(1,mm0);\

  514.                     packuswb_r2r(mm7,mm0);\

  515.                     punpckhbw_r2r(mm7,mm5);\

  516.                     punpckhbw_r2r(mm7,mm3);\

  517.                     paddw_r2r(mm6,mm5);\

  518.                     paddw_r2r(mm3,mm5);\

  519.                     psraw_i2r(1,mm5);\

  520.                     packuswb_r2r(mm7,mm5);\

  521.                     movd_r2m(mm0,cb[0]);\

  522.                     movd_r2m(mm5,cr[0]);

  523. 

  524. #define LINE_NOUV_AVG \

  525.                     movq_m2r(ptr[0],mm0);\

  526.                     movq_m2r(ptr[8],mm1);\

  527.                     pand_r2r(mm5,mm0);\

  528.                     pand_r2r(mm5,mm1);\

  529.                     pmaddwd_r2r(mm6,mm0);\

  530.                     pmaddwd_r2r(mm6,mm1);\

  531.                     packssdw_r2r(mm1,mm0);\

  532.                     paddw_r2r(mm6,mm0);\

  533.                     psraw_i2r(1,mm0);\

  534.                     movq_m2r(ptr[16],mm2);\

  535.                     movq_m2r(ptr[24],mm3);\

  536.                     pand_r2r(mm5,mm2);\

  537.                     pand_r2r(mm5,mm3);\

  538.                     pmaddwd_r2r(mm6,mm2);\

  539.                     pmaddwd_r2r(mm6,mm3);\

  540.                     packssdw_r2r(mm3,mm2);\

  541.                     paddw_r2r(mm6,mm2);\

  542.                     psraw_i2r(1,mm2);\

  543.                     packuswb_r2r(mm2,mm0);\

  544.                     movq_r2m(mm0,lum[0]);

  545. 

  546. #define DEINT_LINE_LUM(ptroff) \

  547.                     movd_m2r(lum_m4[(ptroff)],mm0);\

  548.                     movd_m2r(lum_m3[(ptroff)],mm1);\

  549.                     movd_m2r(lum_m2[(ptroff)],mm2);\

  550.                     movd_m2r(lum_m1[(ptroff)],mm3);\

  551.                     movd_m2r(lum[(ptroff)],mm4);\

  552.                     punpcklbw_r2r(mm7,mm0);\

  553.                     movd_r2m(mm2,lum_m4[(ptroff)]);\

  554.                     punpcklbw_r2r(mm7,mm1);\

  555.                     punpcklbw_r2r(mm7,mm2);\

  556.                     punpcklbw_r2r(mm7,mm3);\

  557.                     punpcklbw_r2r(mm7,mm4);\

  558.                     psllw_i2r(2,mm1);\

  559.                     psllw_i2r(1,mm2);\

  560.                     paddw_r2r(mm6,mm1);\

  561.                     psllw_i2r(2,mm3);\

  562.                     paddw_r2r(mm2,mm1);\

  563.                     paddw_r2r(mm4,mm0);\

  564.                     paddw_r2r(mm3,mm1);\

  565.                     psubusw_r2r(mm0,mm1);\

  566.                     psrlw_i2r(3,mm1);\

  567.                     packuswb_r2r(mm7,mm1);\

  568.                     movd_r2m(mm1,lum_m2[(ptroff)]);

  569. 

  570. #else

  571. #include "../libavcodec/dsputil.h"

  572. 

  573. #define LINE_WITH_UV \

  574.                     lum[0]=ptr[0];lum[1]=ptr[2];lum[2]=ptr[4];lum[3]=ptr[6];\

  575.                     cb[0]=ptr[1];cb[1]=ptr[5];\

  576.                     cr[0]=ptr[3];cr[1]=ptr[7];\

  577.                     lum[4]=ptr[8];lum[5]=ptr[10];lum[6]=ptr[12];lum[7]=ptr[14];\

  578.                     cb[2]=ptr[9];cb[3]=ptr[13];\

  579.                     cr[2]=ptr[11];cr[3]=ptr[15];\

  580.                     lum[8]=ptr[16];lum[9]=ptr[18];lum[10]=ptr[20];lum[11]=ptr[22];\

  581.                     cb[4]=ptr[17];cb[5]=ptr[21];\

  582.                     cr[4]=ptr[19];cr[5]=ptr[23];\

  583.                     lum[12]=ptr[24];lum[13]=ptr[26];lum[14]=ptr[28];lum[15]=ptr[30];\

  584.                     cb[6]=ptr[25];cb[7]=ptr[29];\

  585.                     cr[6]=ptr[27];cr[7]=ptr[31];

  586. 

  587. #define LINE_NO_UV \

  588.                     lum[0]=ptr[0];lum[1]=ptr[2];lum[2]=ptr[4];lum[3]=ptr[6];\

  589.                     lum[4]=ptr[8];lum[5]=ptr[10];lum[6]=ptr[12];lum[7]=ptr[14];\

  590.                     lum[8]=ptr[16];lum[9]=ptr[18];lum[10]=ptr[20];lum[11]=ptr[22];\

  591.                     lum[12]=ptr[24];lum[13]=ptr[26];lum[14]=ptr[28];lum[15]=ptr[30];

  592. 

  593. #define LINE_WITHUV_AVG \

  594.                     sum=(ptr[0]+ptr[2]+1) >> 1;lum[0]=sum; \

  595.                     sum=(ptr[4]+ptr[6]+1) >> 1;lum[1]=sum; \

  596.                     sum=(ptr[1]+ptr[5]+1) >> 1;cb[0]=sum; \

  597.                     sum=(ptr[3]+ptr[7]+1) >> 1;cr[0]=sum; \

  598.                     sum=(ptr[8]+ptr[10]+1) >> 1;lum[2]=sum; \

  599.                     sum=(ptr[12]+ptr[14]+1) >> 1;lum[3]=sum; \

  600.                     sum=(ptr[9]+ptr[13]+1) >> 1;cb[1]=sum; \

  601.                     sum=(ptr[11]+ptr[15]+1) >> 1;cr[1]=sum; \

  602.                     sum=(ptr[16]+ptr[18]+1) >> 1;lum[4]=sum; \

  603.                     sum=(ptr[20]+ptr[22]+1) >> 1;lum[5]=sum; \

  604.                     sum=(ptr[17]+ptr[21]+1) >> 1;cb[2]=sum; \

  605.                     sum=(ptr[19]+ptr[23]+1) >> 1;cr[2]=sum; \

  606.                     sum=(ptr[24]+ptr[26]+1) >> 1;lum[6]=sum; \

  607.                     sum=(ptr[28]+ptr[30]+1) >> 1;lum[7]=sum; \

  608.                     sum=(ptr[25]+ptr[29]+1) >> 1;cb[3]=sum; \

  609.                     sum=(ptr[27]+ptr[31]+1) >> 1;cr[3]=sum; 

  610. 

  611. #define LINE_NOUV_AVG \

  612.                     sum=(ptr[0]+ptr[2]+1) >> 1;lum[0]=sum; \

  613.                     sum=(ptr[4]+ptr[6]+1) >> 1;lum[1]=sum; \

  614.                     sum=(ptr[8]+ptr[10]+1) >> 1;lum[2]=sum; \

  615.                     sum=(ptr[12]+ptr[14]+1) >> 1;lum[3]=sum; \

  616.                     sum=(ptr[16]+ptr[18]+1) >> 1;lum[4]=sum; \

  617.                     sum=(ptr[20]+ptr[22]+1) >> 1;lum[5]=sum; \

  618.                     sum=(ptr[24]+ptr[26]+1) >> 1;lum[6]=sum; \

  619.                     sum=(ptr[28]+ptr[30]+1) >> 1;lum[7]=sum; 

  620. 

  621. #define DEINT_LINE_LUM(ptroff) \

  622.                     sum=(-lum_m4[(ptroff)]+(lum_m3[(ptroff)]<<2)+(lum_m2[(ptroff)]<<1)+(lum_m1[(ptroff)]<<2)-lum[(ptroff)]); \

  623.                     lum_m4[(ptroff)]=lum_m2[(ptroff)];\

  624.                     lum_m2[(ptroff)]=cm[(sum+4)>>3];\

  625.                     sum=(-lum_m4[(ptroff)+1]+(lum_m3[(ptroff)+1]<<2)+(lum_m2[(ptroff)+1]<<1)+(lum_m1[(ptroff)+1]<<2)-lum[(ptroff)+1]); \

  626.                     lum_m4[(ptroff)+1]=lum_m2[(ptroff)+1];\

  627.                     lum_m2[(ptroff)+1]=cm[(sum+4)>>3];\

  628.                     sum=(-lum_m4[(ptroff)+2]+(lum_m3[(ptroff)+2]<<2)+(lum_m2[(ptroff)+2]<<1)+(lum_m1[(ptroff)+2]<<2)-lum[(ptroff)+2]); \

  629.                     lum_m4[(ptroff)+2]=lum_m2[(ptroff)+2];\

  630.                     lum_m2[(ptroff)+2]=cm[(sum+4)>>3];\

  631.                     sum=(-lum_m4[(ptroff)+3]+(lum_m3[(ptroff)+3]<<2)+(lum_m2[(ptroff)+3]<<1)+(lum_m1[(ptroff)+3]<<2)-lum[(ptroff)+3]); \

  632.                     lum_m4[(ptroff)+3]=lum_m2[(ptroff)+3];\

  633.                     lum_m2[(ptroff)+3]=cm[(sum+4)>>3];

  634. 

  635. #endif

  636. 

  637. 

  638. /* Read two fields separately. */

  639. static int aiw_read_picture(VideoData *s, uint8_t *data)

  640. {

  641.     uint8_t *ptr, *lum, *cb, *cr;

  642.     int h;

  643. #ifndef HAVE_MMX

  644.     int sum;

  645. #endif

  646.     uint8_t* src = s->src_mem;

  647.     uint8_t *ptrend = &src[s->width*2];

  648.     lum=data;

  649.     cb=&lum[s->width*s->height];

  650.     cr=&cb[(s->width*s->height)/4];

  651.     if (s->deint == 0 && s->halfw == 0) {

  652.         while (read(s->fd,src,s->width*2) < 0) {

  653.             usleep(100);

  654.         }

  655.         for (h = 0; h < s->height-2; h+=2) {

  656.             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {

  657.                 LINE_WITH_UV

  658.                     }

  659.             read(s->fd,src,s->width*2);

  660.             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {

  661.                 LINE_NO_UV

  662.                     }

  663.             read(s->fd,src,s->width*2);

  664.         }

  665.         /*

  666.          * Do last two lines

  667.          */

  668.         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {

  669.             LINE_WITH_UV

  670.                 }

  671.         read(s->fd,src,s->width*2);

  672.         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {

  673.             LINE_NO_UV

  674.                 }

  675.         /* drop second field */

  676.         while (read(s->fd,src,s->width*2) < 0) {

  677.             usleep(100);

  678.         }

  679.         for (h = 0; h < s->height - 1; h++) {

  680.             read(s->fd,src,s->width*2);

  681.         }

  682.     } else if (s->halfw == 1) {

  683. #ifdef HAVE_MMX

  684.         mmx_t rounder;

  685.         mmx_t masker;

  686.         rounder.uw[0]=1;

  687.         rounder.uw[1]=1;

  688.         rounder.uw[2]=1;

  689.         rounder.uw[3]=1;

  690.         masker.ub[0]=0xff;

  691.         masker.ub[1]=0;

  692.         masker.ub[2]=0xff;

  693.         masker.ub[3]=0;

  694.         masker.ub[4]=0xff;

  695.         masker.ub[5]=0;

  696.         masker.ub[6]=0xff;

  697.         masker.ub[7]=0;

  698.         pxor_r2r(mm7,mm7);

  699.         movq_m2r(rounder,mm6);

  700. #endif

  701.         while (read(s->fd,src,s->width*4) < 0) {

  702.             usleep(100);

  703.         }

  704.         ptrend = &src[s->width*4];

  705.         for (h = 0; h < s->height-2; h+=2) {

  706.             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {

  707.                 LINE_WITHUV_AVG

  708.                     }

  709.             read(s->fd,src,s->width*4);

  710. #ifdef HAVE_MMX

  711.             movq_m2r(masker,mm5);

  712. #endif

  713.             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {

  714.                 LINE_NOUV_AVG

  715.                     }

  716.             read(s->fd,src,s->width*4);

  717.         }

  718.         /*

  719.  * Do last two lines

  720.  */

  721.         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8, cb+=4, cr+=4) {

  722.             LINE_WITHUV_AVG

  723.                 }

  724.         read(s->fd,src,s->width*4);

  725. #ifdef HAVE_MMX

  726.         movq_m2r(masker,mm5);

  727. #endif

  728.         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=8) {

  729.             LINE_NOUV_AVG

  730.                 }

  731.         /* drop second field */

  732.         while (read(s->fd,src,s->width*4) < 0) {

  733.             usleep(100);

  734.         }

  735.         for (h = 0; h < s->height - 1; h++) {

  736.             read(s->fd,src,s->width*4);

  737.         }

  738.     } else {

  739.         uint8_t *lum_m1, *lum_m2, *lum_m3, *lum_m4;

  740. #ifdef HAVE_MMX

  741.         mmx_t rounder;

  742.         rounder.uw[0]=4;

  743.         rounder.uw[1]=4;

  744.         rounder.uw[2]=4;

  745.         rounder.uw[3]=4;

  746.         movq_m2r(rounder,mm6);

  747.         pxor_r2r(mm7,mm7);

  748. #else

  749.         uint8_t *cm = cropTbl + MAX_NEG_CROP;

  750. #endif

  751. 

  752.         /* read two fields and deinterlace them */

  753.         while (read(s->fd,src,s->width*2) < 0) {

  754.             usleep(100);

  755.         }

  756.         for (h = 0; h < (s->height/2)-2; h+=2) {

  757.             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {

  758.                 LINE_WITH_UV

  759.                     }

  760.             read(s->fd,src,s->width*2);

  761.             /* skip a luminance line - will be filled in later */

  762.             lum += s->width;

  763.             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {

  764.                 LINE_WITH_UV

  765.                     }

  766.             /* skip a luminance line - will be filled in later */

  767.             lum += s->width;

  768.             read(s->fd,src,s->width*2);

  769.         }

  770.         /*

  771.  * Do last two lines

  772.  */

  773.         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {

  774.             LINE_WITH_UV

  775.                 }

  776.         /* skip a luminance line - will be filled in later */

  777.         lum += s->width;

  778.         read(s->fd,src,s->width*2);

  779.         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, cb+=8, cr+=8) {

  780.             LINE_WITH_UV

  781.                 }

  782.         /*

  783.  *

  784.  * SECOND FIELD

  785.  *

  786.  */

  787.         lum=&data[s->width];

  788.         while (read(s->fd,src,s->width*2) < 0) {

  789.             usleep(10);

  790.         }

  791.         /* First (and last) two lines not interlaced */

  792.         for (h = 0; h < 2; h++) {

  793.             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16) {

  794.                 LINE_NO_UV

  795.                     }

  796.             read(s->fd,src,s->width*2);

  797.             /* skip a luminance line */

  798.             lum += s->width;

  799.         }

  800.         lum_m1=&lum[-s->width];

  801.         lum_m2=&lum_m1[-s->width];

  802.         lum_m3=&lum_m2[-s->width];

  803.         memmove(s->lum_m4_mem,&lum_m3[-s->width],s->width);

  804.         for (; h < (s->height/2)-1; h++) {

  805.             lum_m4=s->lum_m4_mem;

  806.             for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16,lum_m1+=16,lum_m2+=16,lum_m3+=16,lum_m4+=16) {

  807.                 LINE_NO_UV

  808. 

  809.                     DEINT_LINE_LUM(0)

  810.                     DEINT_LINE_LUM(4)

  811.                     DEINT_LINE_LUM(8)

  812.                     DEINT_LINE_LUM(12)

  813.                     }

  814.             read(s->fd,src,s->width*2);

  815.             /* skip a luminance line */

  816.             lum += s->width;

  817.             lum_m1 += s->width;

  818.             lum_m2 += s->width;

  819.             lum_m3 += s->width;

  820.             //                lum_m4 += s->width;

  821.         }

  822.         /*

  823.  * Do last line

  824.  */

  825.         lum_m4=s->lum_m4_mem;

  826.         for (ptr = &src[0]; ptr < ptrend; ptr+=32, lum+=16, lum_m1+=16, lum_m2+=16, lum_m3+=16, lum_m4+=16) {

  827.             LINE_NO_UV

  828. 

  829.                 DEINT_LINE_LUM(0)

  830.                 DEINT_LINE_LUM(4)

  831.                 DEINT_LINE_LUM(8)

  832.                 DEINT_LINE_LUM(12)

  833.                 }

  834.     }

  835. #ifdef HAVE_MMX

  836.     emms();

  837. #endif

  838.     return s->frame_size;

  839. }

  840. 

  841. static int aiw_close(VideoData *s)

  842. {

  843.     av_freep(&s->lum_m4_mem);

  844.     av_freep(&s->src_mem);

  845.     return 0;

  846. }

  847. 

  848. int video_grab_init(void)

  849. {

  850.     av_register_input_format(&video_grab_device_format);

  851.     return 0;

  852. }