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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 <linux/videodev.h>

  21. #include <unistd.h>

  22. #include <fcntl.h>

  23. #include <sys/ioctl.h>

  24. #include <sys/mman.h>

  25. #include <sys/time.h>

  26. #include <time.h>

  27. 

  28. typedef struct {

  29.     int fd;

  30.     int frame_format; /* see VIDEO_PALETTE_xxx */

  31.     int use_mmap;

  32.     int width, height;

  33.     int frame_rate;

  34.     int frame_rate_base;

  35.     int64_t time_frame;

  36.     int frame_size;

  37.     struct video_capability video_cap;

  38.     struct video_audio audio_saved;

  39.     uint8_t *video_buf;

  40.     struct video_mbuf gb_buffers;

  41.     struct video_mmap gb_buf;

  42.     int gb_frame;

  43. 

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

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

  46.     int aiw_enabled;

  47.     int deint;

  48.     int halfw;

  49.     uint8_t *src_mem;

  50.     uint8_t *lum_m4_mem;

  51. } VideoData;

  52. 

  53. static int aiw_init(VideoData *s);

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

  55. static int aiw_close(VideoData *s);

  56. 

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

  58. {

  59.     VideoData *s = s1->priv_data;

  60.     AVStream *st;

  61.     int width, height;

  62.     int video_fd, frame_size;

  63.     int ret, frame_rate, frame_rate_base;

  64.     int desired_palette;

  65.     struct video_tuner tuner;

  66.     struct video_audio audio;

  67.     const char *video_device;

  68. 

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

  70.         return -1;

  71.     

  72.     width = ap->width;

  73.     height = ap->height;

  74.     frame_rate      = ap->frame_rate;

  75.     frame_rate_base = ap->frame_rate_base;

  76. 

  77.     st = av_new_stream(s1, 0);

  78.     if (!st)

  79.         return -ENOMEM;

  80. 

  81.     s->width = width;

  82.     s->height = height;

  83.     s->frame_rate      = frame_rate;

  84.     s->frame_rate_base = frame_rate_base;

  85. 

  86.     video_device = ap->device;

  87.     if (!video_device)

  88.         video_device = "/dev/video";

  89.     video_fd = open(video_device, O_RDWR);

  90.     if (video_fd < 0) {

  91.         perror(video_device);

  92.         goto fail;

  93.     }

  94.     

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

  96.         perror("VIDIOCGCAP");

  97.         goto fail;

  98.     }

  99. 

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

  101.         fprintf(stderr, "Fatal: grab device does not handle capture\n");

  102.         goto fail;

  103.     }

  104. 

  105.     desired_palette = -1;

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

  107.         desired_palette = VIDEO_PALETTE_YUV420P;

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

  109.         desired_palette = VIDEO_PALETTE_YUV422;

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

  111.         desired_palette = VIDEO_PALETTE_RGB24;

  112.     }    

  113. 

  114.     /* set tv standard */

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

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

  117. 	    tuner.mode = VIDEO_MODE_PAL;

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

  119. 	    tuner.mode = VIDEO_MODE_SECAM;

  120. 	else

  121. 	    tuner.mode = VIDEO_MODE_NTSC;

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

  123.     }

  124.     

  125.     /* unmute audio */

  126.     audio.audio = 0;

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

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

  129.     audio.flags &= ~VIDEO_AUDIO_MUTE;

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

  131. 

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

  133.     if (ret < 0) {

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

  135.         struct video_window win;

  136.         struct video_picture pict;

  137.         int val;

  138. 

  139.         win.x = 0;

  140.         win.y = 0;

  141.         win.width = width;

  142.         win.height = height;

  143.         win.chromakey = -1;

  144.         win.flags = 0;

  145. 

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

  147. 

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

  149. #if 0

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

  151.                pict.colour,

  152.                pict.hue,

  153.                pict.brightness,

  154.                pict.contrast,

  155.                pict.whiteness);

  156. #endif        

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

  158.         pict.palette = desired_palette;

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

  160.             pict.palette=VIDEO_PALETTE_YUV420P;

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

  162.             if (ret < 0) {

  163.                 pict.palette=VIDEO_PALETTE_YUV422;

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

  165.                 if (ret < 0) {

  166.                     pict.palette=VIDEO_PALETTE_RGB24;

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

  168.                     if (ret < 0) 

  169.                         goto fail1;

  170.                 }

  171.             }

  172.         }

  173. 

  174.         s->frame_format = pict.palette;

  175. 

  176.         val = 1;

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

  178. 

  179.         s->time_frame = av_gettime();

  180.         s->use_mmap = 0;

  181.         

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

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

  184.             if (aiw_init(s) < 0)

  185.                 goto fail;

  186.             s->aiw_enabled = 1;

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

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

  189.             s->frame_format = VIDEO_PALETTE_YUV420P;

  190.         }

  191.     } else {

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

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

  194.             perror("mmap");

  195.             goto fail;

  196.         }

  197.         s->gb_frame = 0;

  198.         s->time_frame = av_gettime();

  199.         

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

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

  202.         s->gb_buf.height = height;

  203.         s->gb_buf.width = width;

  204.         s->gb_buf.format = desired_palette;

  205. 

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

  207.             s->gb_buf.format = VIDEO_PALETTE_YUV420P;

  208.             

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

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

  211.                 /* try YUV422 */

  212.                 s->gb_buf.format = VIDEO_PALETTE_YUV422;

  213.                 

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

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

  216.                     /* try RGB24 */

  217.                     s->gb_buf.format = VIDEO_PALETTE_RGB24;

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

  219.                 }

  220.             }

  221.         }

  222.         if (ret < 0) {

  223.             if (errno != EAGAIN) {

  224.             fail1:

  225.                 fprintf(stderr, "Fatal: grab device does not support suitable format\n");

  226.             } else {

  227.                 fprintf(stderr,"Fatal: grab device does not receive any video signal\n");

  228.             }

  229.             goto fail;

  230.         }

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

  232.         s->use_mmap = 1;

  233.     }

  234. 

  235.     switch(s->frame_format) {

  236.     case VIDEO_PALETTE_YUV420P:

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

  238.         st->codec.pix_fmt = PIX_FMT_YUV420P;

  239.         break;

  240.     case VIDEO_PALETTE_YUV422:

  241.         frame_size = width * height * 2;

  242.         st->codec.pix_fmt = PIX_FMT_YUV422;

  243.         break;

  244.     case VIDEO_PALETTE_RGB24:

  245.         frame_size = width * height * 3;

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

  247.         break;

  248.     default:

  249.         goto fail;

  250.     }

  251.     s->fd = video_fd;

  252.     s->frame_size = frame_size;

  253.     

  254.     st->codec.codec_type = CODEC_TYPE_VIDEO;

  255.     st->codec.codec_id = CODEC_ID_RAWVIDEO;

  256.     st->codec.width = width;

  257.     st->codec.height = height;

  258.     st->codec.frame_rate      = frame_rate;

  259.     st->codec.frame_rate_base = frame_rate_base;

  260.     

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

  262. 

  263.     return 0;

  264.  fail:

  265.     if (video_fd >= 0)

  266.         close(video_fd);

  267.     av_free(st);

  268.     return -EIO;

  269. }

  270. 

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

  272. {

  273.     uint8_t *ptr;

  274. 

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

  276.     s->gb_buf.frame = (s->gb_frame + 1) % s->gb_buffers.frames;

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

  278.         if (errno == EAGAIN)

  279.             fprintf(stderr,"Cannot Sync\n");

  280.         else

  281.             perror("VIDIOCMCAPTURE");

  282.         return -EIO;

  283.     }

  284. 

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

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

  287. 

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

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

  290. 

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

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

  293. 

  294.     return s->frame_size;

  295. }

  296. 

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

  298. {

  299.     VideoData *s = s1->priv_data;

  300.     int64_t curtime, delay;

  301.     struct timespec ts;

  302.     int64_t per_frame = (int64_t_C(1000000) * s->frame_rate_base) / s->frame_rate;

  303. 

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

  305.     s->time_frame += per_frame;

  306. 

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

  308.     for(;;) {

  309.         curtime = av_gettime();

  310.         delay = s->time_frame - curtime;

  311.         if (delay <= 0) {

  312.             if (delay < -per_frame) {

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

  314.                 s->time_frame += per_frame;

  315.             }

  316.             break;

  317.         }    

  318.         ts.tv_sec = delay / 1000000;

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

  320.         nanosleep(&ts, NULL);

  321.     }

  322. 

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

  324.         return -EIO;

  325. 

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

  327. 

  328.     /* read one frame */

  329.     if (s->aiw_enabled) {

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

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

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

  333.     } else {

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

  335.             return -EIO;

  336.         return s->frame_size;

  337.     }

  338. }

  339. 

  340. static int grab_read_close(AVFormatContext *s1)

  341. {

  342.     VideoData *s = s1->priv_data;

  343. 

  344.     if (s->aiw_enabled)

  345.         aiw_close(s);

  346. 

  347.     if (s->use_mmap)

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

  349. 

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

  351.        return its state correctly */

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

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

  354. 

  355.     close(s->fd);

  356.     return 0;

  357. }

  358. 

  359. static AVInputFormat video_grab_device_format = {

  360.     "video4linux",

  361.     "video grab",

  362.     sizeof(VideoData),

  363.     NULL,

  364.     grab_read_header,

  365.     grab_read_packet,

  366.     grab_read_close,

  367.     .flags = AVFMT_NOFILE,

  368. };

  369. 

  370. /* All in Wonder specific stuff */

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

  372. 

  373. static int aiw_init(VideoData *s)

  374. {

  375.     int width, height;

  376. 

  377.     width = s->width;

  378.     height = s->height;

  379. 

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

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

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

  383.         

  384.         s->deint=0;

  385.         s->halfw=0;

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

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

  388.     } else {

  389.         fprintf(stderr,"\nIncorrect Grab Size Supplied - Supported Sizes Are:\n");

  390.         fprintf(stderr," %dx%d  %dx%d %dx%d\n\n",

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

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

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

  394.         goto fail;

  395.     }

  396. 

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

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

  399.     } else {

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

  401.     }

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

  403. 

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

  405.     if (!s->lum_m4_mem)

  406.         goto fail;

  407.     return 0;

  408.  fail:

  409.     av_freep(&s->src_mem);

  410.     av_freep(&s->lum_m4_mem);

  411.     return -1;

  412. }

  413. 

  414. #ifdef HAVE_MMX

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

  416. 

  417. #define LINE_WITH_UV \

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

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

  420.                     movq_r2r(mm0, mm4); \

  421.                     punpcklbw_r2r(mm1,mm0); \

  422.                     punpckhbw_r2r(mm1,mm4); \

  423.                     movq_r2r(mm0,mm5); \

  424.                     punpcklbw_r2r(mm4,mm0); \

  425.                     punpckhbw_r2r(mm4,mm5); \

  426.                     movq_r2r(mm0,mm1); \

  427.                     punpcklbw_r2r(mm5,mm1); \

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

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

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

  431.                     movq_r2r(mm2,mm4); \

  432.                     punpcklbw_r2r(mm1,mm2); \

  433.                     punpckhbw_r2r(mm1,mm4); \

  434.                     movq_r2r(mm2,mm3); \

  435.                     punpcklbw_r2r(mm4,mm2); \

  436.                     punpckhbw_r2r(mm4,mm3); \

  437.                     movq_r2r(mm2,mm1); \

  438.                     punpcklbw_r2r(mm3,mm1); \

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

  440.                     punpckhdq_r2r(mm2,mm0); \

  441.                     punpckhdq_r2r(mm3,mm5); \

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

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

  444. 

  445. #define LINE_NO_UV \

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

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

  448.                     movq_r2r(mm0, mm4);\

  449.                     punpcklbw_r2r(mm1,mm0); \

  450.                     punpckhbw_r2r(mm1,mm4);\

  451.                     movq_r2r(mm0,mm5);\

  452.                     punpcklbw_r2r(mm4,mm0);\

  453.                     punpckhbw_r2r(mm4,mm5);\

  454.                     movq_r2r(mm0,mm1);\

  455.                     punpcklbw_r2r(mm5,mm1);\

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

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

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

  459.                     movq_r2r(mm2,mm4);\

  460.                     punpcklbw_r2r(mm1,mm2);\

  461.                     punpckhbw_r2r(mm1,mm4);\

  462.                     movq_r2r(mm2,mm3);\

  463.                     punpcklbw_r2r(mm4,mm2);\

  464.                     punpckhbw_r2r(mm4,mm3);\

  465.                     movq_r2r(mm2,mm1);\

  466.                     punpcklbw_r2r(mm3,mm1);\

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

  468. 

  469. #define LINE_WITHUV_AVG \

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

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

  472.                     movq_r2r(mm0, mm4);\

  473.                     punpcklbw_r2r(mm1,mm0);\

  474.                     punpckhbw_r2r(mm1,mm4);\

  475.                     movq_r2r(mm0,mm5);\

  476.                     punpcklbw_r2r(mm4,mm0);\

  477.                     punpckhbw_r2r(mm4,mm5);\

  478.                     movq_r2r(mm0,mm1);\

  479.                     movq_r2r(mm5,mm2);\

  480.                     punpcklbw_r2r(mm7,mm1);\

  481.                     punpcklbw_r2r(mm7,mm2);\

  482.                     paddw_r2r(mm6,mm1);\

  483.                     paddw_r2r(mm2,mm1);\

  484.                     psraw_i2r(1,mm1);\

  485.                     packuswb_r2r(mm7,mm1);\

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

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

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

  489.                     movq_r2r(mm2,mm4);\

  490.                     punpcklbw_r2r(mm1,mm2);\

  491.                     punpckhbw_r2r(mm1,mm4);\

  492.                     movq_r2r(mm2,mm3);\

  493.                     punpcklbw_r2r(mm4,mm2);\

  494.                     punpckhbw_r2r(mm4,mm3);\

  495.                     movq_r2r(mm2,mm1);\

  496.                     movq_r2r(mm3,mm4);\

  497.                     punpcklbw_r2r(mm7,mm1);\

  498.                     punpcklbw_r2r(mm7,mm4);\

  499.                     paddw_r2r(mm6,mm1);\

  500.                     paddw_r2r(mm4,mm1);\

  501.                     psraw_i2r(1,mm1);\

  502.                     packuswb_r2r(mm7,mm1);\

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

  504.                     punpckhbw_r2r(mm7,mm0);\

  505.                     punpckhbw_r2r(mm7,mm2);\

  506.                     paddw_r2r(mm6,mm0);\

  507.                     paddw_r2r(mm2,mm0);\

  508.                     psraw_i2r(1,mm0);\

  509.                     packuswb_r2r(mm7,mm0);\

  510.                     punpckhbw_r2r(mm7,mm5);\

  511.                     punpckhbw_r2r(mm7,mm3);\

  512.                     paddw_r2r(mm6,mm5);\

  513.                     paddw_r2r(mm3,mm5);\

  514.                     psraw_i2r(1,mm5);\

  515.                     packuswb_r2r(mm7,mm5);\

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

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

  518. 

  519. #define LINE_NOUV_AVG \

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

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

  522.                     pand_r2r(mm5,mm0);\

  523.                     pand_r2r(mm5,mm1);\

  524.                     pmaddwd_r2r(mm6,mm0);\

  525.                     pmaddwd_r2r(mm6,mm1);\

  526.                     packssdw_r2r(mm1,mm0);\

  527.                     paddw_r2r(mm6,mm0);\

  528.                     psraw_i2r(1,mm0);\

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

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

  531.                     pand_r2r(mm5,mm2);\

  532.                     pand_r2r(mm5,mm3);\

  533.                     pmaddwd_r2r(mm6,mm2);\

  534.                     pmaddwd_r2r(mm6,mm3);\

  535.                     packssdw_r2r(mm3,mm2);\

  536.                     paddw_r2r(mm6,mm2);\

  537.                     psraw_i2r(1,mm2);\

  538.                     packuswb_r2r(mm2,mm0);\

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

  540. 

  541. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

  547.                     punpcklbw_r2r(mm7,mm0);\

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

  549.                     punpcklbw_r2r(mm7,mm1);\

  550.                     punpcklbw_r2r(mm7,mm2);\

  551.                     punpcklbw_r2r(mm7,mm3);\

  552.                     punpcklbw_r2r(mm7,mm4);\

  553.                     psllw_i2r(2,mm1);\

  554.                     psllw_i2r(1,mm2);\

  555.                     paddw_r2r(mm6,mm1);\

  556.                     psllw_i2r(2,mm3);\

  557.                     paddw_r2r(mm2,mm1);\

  558.                     paddw_r2r(mm4,mm0);\

  559.                     paddw_r2r(mm3,mm1);\

  560.                     psubusw_r2r(mm0,mm1);\

  561.                     psrlw_i2r(3,mm1);\

  562.                     packuswb_r2r(mm7,mm1);\

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

  564. 

  565. #else

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

  567. 

  568. #define LINE_WITH_UV \

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

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

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

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

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

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

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

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

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

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

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

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

  581. 

  582. #define LINE_NO_UV \

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

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

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

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

  587. 

  588. #define LINE_WITHUV_AVG \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  605. 

  606. #define LINE_NOUV_AVG \

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

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

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

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

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

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

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

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

  615. 

  616. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

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

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

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

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

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

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

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

  629. 

  630. #endif

  631. 

  632. 

  633. /* Read two fields separately. */

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

  635. {

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

  637.     int h;

  638. #ifndef HAVE_MMX

  639.     int sum;

  640. #endif

  641.     uint8_t* src = s->src_mem;

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

  643.     lum=data;

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

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

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

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

  648.             usleep(100);

  649.         }

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

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

  652.                 LINE_WITH_UV

  653.                     }

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

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

  656.                 LINE_NO_UV

  657.                     }

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

  659.         }

  660.         /*

  661.          * Do last two lines

  662.          */

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

  664.             LINE_WITH_UV

  665.                 }

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

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

  668.             LINE_NO_UV

  669.                 }

  670.         /* drop second field */

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

  672.             usleep(100);

  673.         }

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

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

  676.         }

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

  678. #ifdef HAVE_MMX

  679.         mmx_t rounder;

  680.         mmx_t masker;

  681.         rounder.uw[0]=1;

  682.         rounder.uw[1]=1;

  683.         rounder.uw[2]=1;

  684.         rounder.uw[3]=1;

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

  686.         masker.ub[1]=0;

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

  688.         masker.ub[3]=0;

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

  690.         masker.ub[5]=0;

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

  692.         masker.ub[7]=0;

  693.         pxor_r2r(mm7,mm7);

  694.         movq_m2r(rounder,mm6);

  695. #endif

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

  697.             usleep(100);

  698.         }

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

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

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

  702.                 LINE_WITHUV_AVG

  703.                     }

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

  705. #ifdef HAVE_MMX

  706.             movq_m2r(masker,mm5);

  707. #endif

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

  709.                 LINE_NOUV_AVG

  710.                     }

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

  712.         }

  713.         /*

  714.  * Do last two lines

  715.  */

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

  717.             LINE_WITHUV_AVG

  718.                 }

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

  720. #ifdef HAVE_MMX

  721.         movq_m2r(masker,mm5);

  722. #endif

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

  724.             LINE_NOUV_AVG

  725.                 }

  726.         /* drop second field */

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

  728.             usleep(100);

  729.         }

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

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

  732.         }

  733.     } else {

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

  735. #ifdef HAVE_MMX

  736.         mmx_t rounder;

  737.         rounder.uw[0]=4;

  738.         rounder.uw[1]=4;

  739.         rounder.uw[2]=4;

  740.         rounder.uw[3]=4;

  741.         movq_m2r(rounder,mm6);

  742.         pxor_r2r(mm7,mm7);

  743. #else

  744.         uint8_t *cm = cropTbl + MAX_NEG_CROP;

  745. #endif

  746. 

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

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

  749.             usleep(100);

  750.         }

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

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

  753.                 LINE_WITH_UV

  754.                     }

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

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

  757.             lum += s->width;

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

  759.                 LINE_WITH_UV

  760.                     }

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

  762.             lum += s->width;

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

  764.         }

  765.         /*

  766.  * Do last two lines

  767.  */

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

  769.             LINE_WITH_UV

  770.                 }

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

  772.         lum += s->width;

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

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

  775.             LINE_WITH_UV

  776.                 }

  777.         /*

  778.  *

  779.  * SECOND FIELD

  780.  *

  781.  */

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

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

  784.             usleep(10);

  785.         }

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

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

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

  789.                 LINE_NO_UV

  790.                     }

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

  792.             /* skip a luminance line */

  793.             lum += s->width;

  794.         }

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

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

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

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

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

  800.             lum_m4=s->lum_m4_mem;

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

  802.                 LINE_NO_UV

  803. 

  804.                     DEINT_LINE_LUM(0)

  805.                     DEINT_LINE_LUM(4)

  806.                     DEINT_LINE_LUM(8)

  807.                     DEINT_LINE_LUM(12)

  808.                     }

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

  810.             /* skip a luminance line */

  811.             lum += s->width;

  812.             lum_m1 += s->width;

  813.             lum_m2 += s->width;

  814.             lum_m3 += s->width;

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

  816.         }

  817.         /*

  818.  * Do last line

  819.  */

  820.         lum_m4=s->lum_m4_mem;

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

  822.             LINE_NO_UV

  823. 

  824.                 DEINT_LINE_LUM(0)

  825.                 DEINT_LINE_LUM(4)

  826.                 DEINT_LINE_LUM(8)

  827.                 DEINT_LINE_LUM(12)

  828.                 }

  829.     }

  830. #ifdef HAVE_MMX

  831.     emms();

  832. #endif

  833.     return s->frame_size;

  834. }

  835. 

  836. static int aiw_close(VideoData *s)

  837. {

  838.     av_freep(&s->lum_m4_mem);

  839.     av_freep(&s->src_mem);

  840.     return 0;

  841. }

  842. 

  843. int video_grab_init(void)

  844. {

  845.     av_register_input_format(&video_grab_device_format);

  846.     return 0;

  847. }