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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->time_base.den <= 0)

  72.         return -1;

  73.     

  74.     width = ap->width;

  75.     height = ap->height;

  76.     frame_rate      = ap->time_base.den;

  77.     frame_rate_base = ap->time_base.num;

  78. 

  79.     if((unsigned)width > 32767 || (unsigned)height > 32767)

  80.         return -1;

  81.     

  82.     st = av_new_stream(s1, 0);

  83.     if (!st)

  84.         return -ENOMEM;

  85.     av_set_pts_info(st, 48, 1, 1000000); /* 48 bits pts in us */

  86. 

  87.     s->width = width;

  88.     s->height = height;

  89.     s->frame_rate      = frame_rate;

  90.     s->frame_rate_base = frame_rate_base;

  91. 

  92.     video_device = ap->device;

  93.     if (!video_device)

  94.         video_device = "/dev/video";

  95.     video_fd = open(video_device, O_RDWR);

  96.     if (video_fd < 0) {

  97.         perror(video_device);

  98.         goto fail;

  99.     }

  100.     

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

  102.         perror("VIDIOCGCAP");

  103.         goto fail;

  104.     }

  105. 

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

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

  108.         goto fail;

  109.     }

  110. 

  111.     desired_palette = -1;

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

  113.         desired_palette = VIDEO_PALETTE_YUV420P;

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

  115.         desired_palette = VIDEO_PALETTE_YUV422;

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

  117.         desired_palette = VIDEO_PALETTE_RGB24;

  118.     }    

  119. 

  120.     /* set tv standard */

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

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

  123. 	    tuner.mode = VIDEO_MODE_PAL;

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

  125. 	    tuner.mode = VIDEO_MODE_SECAM;

  126. 	else

  127. 	    tuner.mode = VIDEO_MODE_NTSC;

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

  129.     }

  130.     

  131.     /* unmute audio */

  132.     audio.audio = 0;

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

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

  135.     audio.flags &= ~VIDEO_AUDIO_MUTE;

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

  137. 

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

  139.     if (ret < 0) {

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

  141.         struct video_window win;

  142.         struct video_picture pict;

  143.         int val;

  144. 

  145.         win.x = 0;

  146.         win.y = 0;

  147.         win.width = width;

  148.         win.height = height;

  149.         win.chromakey = -1;

  150.         win.flags = 0;

  151. 

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

  153. 

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

  155. #if 0

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

  157.                pict.colour,

  158.                pict.hue,

  159.                pict.brightness,

  160.                pict.contrast,

  161.                pict.whiteness);

  162. #endif        

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

  164.         pict.palette = desired_palette;

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

  166.             pict.palette=VIDEO_PALETTE_YUV420P;

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

  168.             if (ret < 0) {

  169.                 pict.palette=VIDEO_PALETTE_YUV422;

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

  171.                 if (ret < 0) {

  172.                     pict.palette=VIDEO_PALETTE_RGB24;

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

  174.                     if (ret < 0) 

  175.                         goto fail1;

  176.                 }

  177.             }

  178.         }

  179. 

  180.         s->frame_format = pict.palette;

  181. 

  182.         val = 1;

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

  184. 

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

  186.         s->use_mmap = 0;

  187.         

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

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

  190.             if (aiw_init(s) < 0)

  191.                 goto fail;

  192.             s->aiw_enabled = 1;

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

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

  195.             s->frame_format = VIDEO_PALETTE_YUV420P;

  196.         }

  197.     } else {

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

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

  200.             perror("mmap");

  201.             goto fail;

  202.         }

  203.         s->gb_frame = 0;

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

  205.         

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

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

  208.         s->gb_buf.height = height;

  209.         s->gb_buf.width = width;

  210.         s->gb_buf.format = desired_palette;

  211. 

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

  213.             s->gb_buf.format = VIDEO_PALETTE_YUV420P;

  214.             

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

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

  217.                 /* try YUV422 */

  218.                 s->gb_buf.format = VIDEO_PALETTE_YUV422;

  219.                 

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

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

  222.                     /* try RGB24 */

  223.                     s->gb_buf.format = VIDEO_PALETTE_RGB24;

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

  225.                 }

  226.             }

  227.         }

  228.         if (ret < 0) {

  229.             if (errno != EAGAIN) {

  230.             fail1:

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

  232.             } else {

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

  234.             }

  235.             goto fail;

  236.         }

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

  238. 	  s->gb_buf.frame = j;

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

  240. 	}

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

  242.         s->use_mmap = 1;

  243.     }

  244. 

  245.     switch(s->frame_format) {

  246.     case VIDEO_PALETTE_YUV420P:

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

  248.         st->codec->pix_fmt = PIX_FMT_YUV420P;

  249.         break;

  250.     case VIDEO_PALETTE_YUV422:

  251.         frame_size = width * height * 2;

  252.         st->codec->pix_fmt = PIX_FMT_YUV422;

  253.         break;

  254.     case VIDEO_PALETTE_RGB24:

  255.         frame_size = width * height * 3;

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

  257.         break;

  258.     default:

  259.         goto fail;

  260.     }

  261.     s->fd = video_fd;

  262.     s->frame_size = frame_size;

  263.     

  264.     st->codec->codec_type = CODEC_TYPE_VIDEO;

  265.     st->codec->codec_id = CODEC_ID_RAWVIDEO;

  266.     st->codec->width = width;

  267.     st->codec->height = height;

  268.     st->codec->time_base.den      = frame_rate;

  269.     st->codec->time_base.num = frame_rate_base;

  270.     st->codec->bit_rate = frame_size * 1/av_q2d(st->codec->time_base) * 8;

  271. 

  272.     return 0;

  273.  fail:

  274.     if (video_fd >= 0)

  275.         close(video_fd);

  276.     av_free(st);

  277.     return AVERROR_IO;

  278. }

  279. 

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

  281. {

  282.     uint8_t *ptr;

  283. 

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

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

  286. 

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

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

  289. 

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

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

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

  293.         if (errno == EAGAIN)

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

  295.         else

  296.             perror("VIDIOCMCAPTURE");

  297.         return AVERROR_IO;

  298.     }

  299. 

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

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

  302. 

  303.     return s->frame_size;

  304. }

  305. 

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

  307. {

  308.     VideoData *s = s1->priv_data;

  309.     int64_t curtime, delay;

  310.     struct timespec ts;

  311. 

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

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

  314. 

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

  316.     for(;;) {

  317.         curtime = av_gettime();

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

  319.         if (delay <= 0) {

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

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

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

  323.             }

  324.             break;

  325.         }    

  326.         ts.tv_sec = delay / 1000000;

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

  328.         nanosleep(&ts, NULL);

  329.     }

  330. 

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

  332.         return AVERROR_IO;

  333. 

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

  335. 

  336.     /* read one frame */

  337.     if (s->aiw_enabled) {

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

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

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

  341.     } else {

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

  343.             return AVERROR_IO;

  344.         return s->frame_size;

  345.     }

  346. }

  347. 

  348. static int grab_read_close(AVFormatContext *s1)

  349. {

  350.     VideoData *s = s1->priv_data;

  351. 

  352.     if (s->aiw_enabled)

  353.         aiw_close(s);

  354. 

  355.     if (s->use_mmap)

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

  357. 

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

  359.        return its state correctly */

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

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

  362. 

  363.     close(s->fd);

  364.     return 0;

  365. }

  366. 

  367. static AVInputFormat video_grab_device_format = {

  368.     "video4linux",

  369.     "video grab",

  370.     sizeof(VideoData),

  371.     NULL,

  372.     grab_read_header,

  373.     grab_read_packet,

  374.     grab_read_close,

  375.     .flags = AVFMT_NOFILE,

  376. };

  377. 

  378. /* All in Wonder specific stuff */

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

  380. 

  381. static int aiw_init(VideoData *s)

  382. {

  383.     int width, height;

  384. 

  385.     width = s->width;

  386.     height = s->height;

  387. 

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

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

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

  391.         

  392.         s->deint=0;

  393.         s->halfw=0;

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

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

  396.     } else {

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

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

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

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

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

  402.         goto fail;

  403.     }

  404. 

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

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

  407.     } else {

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

  409.     }

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

  411. 

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

  413.     if (!s->lum_m4_mem)

  414.         goto fail;

  415.     return 0;

  416.  fail:

  417.     av_freep(&s->src_mem);

  418.     av_freep(&s->lum_m4_mem);

  419.     return -1;

  420. }

  421. 

  422. #ifdef HAVE_MMX

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

  424. 

  425. #define LINE_WITH_UV \

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

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

  428.                     movq_r2r(mm0, mm4); \

  429.                     punpcklbw_r2r(mm1,mm0); \

  430.                     punpckhbw_r2r(mm1,mm4); \

  431.                     movq_r2r(mm0,mm5); \

  432.                     punpcklbw_r2r(mm4,mm0); \

  433.                     punpckhbw_r2r(mm4,mm5); \

  434.                     movq_r2r(mm0,mm1); \

  435.                     punpcklbw_r2r(mm5,mm1); \

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

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

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

  439.                     movq_r2r(mm2,mm4); \

  440.                     punpcklbw_r2r(mm1,mm2); \

  441.                     punpckhbw_r2r(mm1,mm4); \

  442.                     movq_r2r(mm2,mm3); \

  443.                     punpcklbw_r2r(mm4,mm2); \

  444.                     punpckhbw_r2r(mm4,mm3); \

  445.                     movq_r2r(mm2,mm1); \

  446.                     punpcklbw_r2r(mm3,mm1); \

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

  448.                     punpckhdq_r2r(mm2,mm0); \

  449.                     punpckhdq_r2r(mm3,mm5); \

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

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

  452. 

  453. #define LINE_NO_UV \

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

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

  456.                     movq_r2r(mm0, mm4);\

  457.                     punpcklbw_r2r(mm1,mm0); \

  458.                     punpckhbw_r2r(mm1,mm4);\

  459.                     movq_r2r(mm0,mm5);\

  460.                     punpcklbw_r2r(mm4,mm0);\

  461.                     punpckhbw_r2r(mm4,mm5);\

  462.                     movq_r2r(mm0,mm1);\

  463.                     punpcklbw_r2r(mm5,mm1);\

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

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

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

  467.                     movq_r2r(mm2,mm4);\

  468.                     punpcklbw_r2r(mm1,mm2);\

  469.                     punpckhbw_r2r(mm1,mm4);\

  470.                     movq_r2r(mm2,mm3);\

  471.                     punpcklbw_r2r(mm4,mm2);\

  472.                     punpckhbw_r2r(mm4,mm3);\

  473.                     movq_r2r(mm2,mm1);\

  474.                     punpcklbw_r2r(mm3,mm1);\

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

  476. 

  477. #define LINE_WITHUV_AVG \

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

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

  480.                     movq_r2r(mm0, mm4);\

  481.                     punpcklbw_r2r(mm1,mm0);\

  482.                     punpckhbw_r2r(mm1,mm4);\

  483.                     movq_r2r(mm0,mm5);\

  484.                     punpcklbw_r2r(mm4,mm0);\

  485.                     punpckhbw_r2r(mm4,mm5);\

  486.                     movq_r2r(mm0,mm1);\

  487.                     movq_r2r(mm5,mm2);\

  488.                     punpcklbw_r2r(mm7,mm1);\

  489.                     punpcklbw_r2r(mm7,mm2);\

  490.                     paddw_r2r(mm6,mm1);\

  491.                     paddw_r2r(mm2,mm1);\

  492.                     psraw_i2r(1,mm1);\

  493.                     packuswb_r2r(mm7,mm1);\

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

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

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

  497.                     movq_r2r(mm2,mm4);\

  498.                     punpcklbw_r2r(mm1,mm2);\

  499.                     punpckhbw_r2r(mm1,mm4);\

  500.                     movq_r2r(mm2,mm3);\

  501.                     punpcklbw_r2r(mm4,mm2);\

  502.                     punpckhbw_r2r(mm4,mm3);\

  503.                     movq_r2r(mm2,mm1);\

  504.                     movq_r2r(mm3,mm4);\

  505.                     punpcklbw_r2r(mm7,mm1);\

  506.                     punpcklbw_r2r(mm7,mm4);\

  507.                     paddw_r2r(mm6,mm1);\

  508.                     paddw_r2r(mm4,mm1);\

  509.                     psraw_i2r(1,mm1);\

  510.                     packuswb_r2r(mm7,mm1);\

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

  512.                     punpckhbw_r2r(mm7,mm0);\

  513.                     punpckhbw_r2r(mm7,mm2);\

  514.                     paddw_r2r(mm6,mm0);\

  515.                     paddw_r2r(mm2,mm0);\

  516.                     psraw_i2r(1,mm0);\

  517.                     packuswb_r2r(mm7,mm0);\

  518.                     punpckhbw_r2r(mm7,mm5);\

  519.                     punpckhbw_r2r(mm7,mm3);\

  520.                     paddw_r2r(mm6,mm5);\

  521.                     paddw_r2r(mm3,mm5);\

  522.                     psraw_i2r(1,mm5);\

  523.                     packuswb_r2r(mm7,mm5);\

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

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

  526. 

  527. #define LINE_NOUV_AVG \

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

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

  530.                     pand_r2r(mm5,mm0);\

  531.                     pand_r2r(mm5,mm1);\

  532.                     pmaddwd_r2r(mm6,mm0);\

  533.                     pmaddwd_r2r(mm6,mm1);\

  534.                     packssdw_r2r(mm1,mm0);\

  535.                     paddw_r2r(mm6,mm0);\

  536.                     psraw_i2r(1,mm0);\

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

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

  539.                     pand_r2r(mm5,mm2);\

  540.                     pand_r2r(mm5,mm3);\

  541.                     pmaddwd_r2r(mm6,mm2);\

  542.                     pmaddwd_r2r(mm6,mm3);\

  543.                     packssdw_r2r(mm3,mm2);\

  544.                     paddw_r2r(mm6,mm2);\

  545.                     psraw_i2r(1,mm2);\

  546.                     packuswb_r2r(mm2,mm0);\

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

  548. 

  549. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

  555.                     punpcklbw_r2r(mm7,mm0);\

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

  557.                     punpcklbw_r2r(mm7,mm1);\

  558.                     punpcklbw_r2r(mm7,mm2);\

  559.                     punpcklbw_r2r(mm7,mm3);\

  560.                     punpcklbw_r2r(mm7,mm4);\

  561.                     psllw_i2r(2,mm1);\

  562.                     psllw_i2r(1,mm2);\

  563.                     paddw_r2r(mm6,mm1);\

  564.                     psllw_i2r(2,mm3);\

  565.                     paddw_r2r(mm2,mm1);\

  566.                     paddw_r2r(mm4,mm0);\

  567.                     paddw_r2r(mm3,mm1);\

  568.                     psubusw_r2r(mm0,mm1);\

  569.                     psrlw_i2r(3,mm1);\

  570.                     packuswb_r2r(mm7,mm1);\

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

  572. 

  573. #else

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

  575. 

  576. #define LINE_WITH_UV \

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

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

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

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

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

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

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

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

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

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

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

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

  589. 

  590. #define LINE_NO_UV \

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

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

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

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

  595. 

  596. #define LINE_WITHUV_AVG \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  613. 

  614. #define LINE_NOUV_AVG \

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

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

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

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

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

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

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

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

  623. 

  624. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

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

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

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

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

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

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

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

  637. 

  638. #endif

  639. 

  640. 

  641. /* Read two fields separately. */

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

  643. {

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

  645.     int h;

  646. #ifndef HAVE_MMX

  647.     int sum;

  648. #endif

  649.     uint8_t* src = s->src_mem;

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

  651.     lum=data;

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

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

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

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

  656.             usleep(100);

  657.         }

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

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

  660.                 LINE_WITH_UV

  661.                     }

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

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

  664.                 LINE_NO_UV

  665.                     }

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

  667.         }

  668.         /*

  669.          * Do last two lines

  670.          */

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

  672.             LINE_WITH_UV

  673.                 }

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

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

  676.             LINE_NO_UV

  677.                 }

  678.         /* drop second field */

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

  680.             usleep(100);

  681.         }

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

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

  684.         }

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

  686. #ifdef HAVE_MMX

  687.         mmx_t rounder;

  688.         mmx_t masker;

  689.         rounder.uw[0]=1;

  690.         rounder.uw[1]=1;

  691.         rounder.uw[2]=1;

  692.         rounder.uw[3]=1;

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

  694.         masker.ub[1]=0;

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

  696.         masker.ub[3]=0;

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

  698.         masker.ub[5]=0;

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

  700.         masker.ub[7]=0;

  701.         pxor_r2r(mm7,mm7);

  702.         movq_m2r(rounder,mm6);

  703. #endif

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

  705.             usleep(100);

  706.         }

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

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

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

  710.                 LINE_WITHUV_AVG

  711.                     }

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

  713. #ifdef HAVE_MMX

  714.             movq_m2r(masker,mm5);

  715. #endif

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

  717.                 LINE_NOUV_AVG

  718.                     }

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

  720.         }

  721.         /*

  722.  * Do last two lines

  723.  */

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

  725.             LINE_WITHUV_AVG

  726.                 }

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

  728. #ifdef HAVE_MMX

  729.         movq_m2r(masker,mm5);

  730. #endif

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

  732.             LINE_NOUV_AVG

  733.                 }

  734.         /* drop second field */

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

  736.             usleep(100);

  737.         }

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

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

  740.         }

  741.     } else {

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

  743. #ifdef HAVE_MMX

  744.         mmx_t rounder;

  745.         rounder.uw[0]=4;

  746.         rounder.uw[1]=4;

  747.         rounder.uw[2]=4;

  748.         rounder.uw[3]=4;

  749.         movq_m2r(rounder,mm6);

  750.         pxor_r2r(mm7,mm7);

  751. #else

  752.         uint8_t *cm = cropTbl + MAX_NEG_CROP;

  753. #endif

  754. 

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

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

  757.             usleep(100);

  758.         }

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

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

  761.                 LINE_WITH_UV

  762.                     }

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

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

  765.             lum += s->width;

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

  767.                 LINE_WITH_UV

  768.                     }

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

  770.             lum += s->width;

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

  772.         }

  773.         /*

  774.  * Do last two lines

  775.  */

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

  777.             LINE_WITH_UV

  778.                 }

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

  780.         lum += s->width;

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

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

  783.             LINE_WITH_UV

  784.                 }

  785.         /*

  786.  *

  787.  * SECOND FIELD

  788.  *

  789.  */

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

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

  792.             usleep(10);

  793.         }

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

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

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

  797.                 LINE_NO_UV

  798.                     }

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

  800.             /* skip a luminance line */

  801.             lum += s->width;

  802.         }

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

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

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

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

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

  808.             lum_m4=s->lum_m4_mem;

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

  810.                 LINE_NO_UV

  811. 

  812.                     DEINT_LINE_LUM(0)

  813.                     DEINT_LINE_LUM(4)

  814.                     DEINT_LINE_LUM(8)

  815.                     DEINT_LINE_LUM(12)

  816.                     }

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

  818.             /* skip a luminance line */

  819.             lum += s->width;

  820.             lum_m1 += s->width;

  821.             lum_m2 += s->width;

  822.             lum_m3 += s->width;

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

  824.         }

  825.         /*

  826.  * Do last line

  827.  */

  828.         lum_m4=s->lum_m4_mem;

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

  830.             LINE_NO_UV

  831. 

  832.                 DEINT_LINE_LUM(0)

  833.                 DEINT_LINE_LUM(4)

  834.                 DEINT_LINE_LUM(8)

  835.                 DEINT_LINE_LUM(12)

  836.                 }

  837.     }

  838. #ifdef HAVE_MMX

  839.     emms();

  840. #endif

  841.     return s->frame_size;

  842. }

  843. 

  844. static int aiw_close(VideoData *s)

  845. {

  846.     av_freep(&s->lum_m4_mem);

  847.     av_freep(&s->src_mem);

  848.     return 0;

  849. }

  850. 

  851. int video_grab_init(void)

  852. {

  853.     av_register_input_format(&video_grab_device_format);

  854.     return 0;

  855. }