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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_audio audio;

  66.     const char *video_device;

  67. 

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

  69.         return -1;

  70.     

  71.     width = ap->width;

  72.     height = ap->height;

  73.     frame_rate      = ap->frame_rate;

  74.     frame_rate_base = ap->frame_rate_base;

  75. 

  76.     st = av_new_stream(s1, 0);

  77.     if (!st)

  78.         return -ENOMEM;

  79. 

  80.     s->width = width;

  81.     s->height = height;

  82.     s->frame_rate      = frame_rate;

  83.     s->frame_rate_base = frame_rate_base;

  84. 

  85.     video_device = ap->device;

  86.     if (!video_device)

  87.         video_device = "/dev/video";

  88.     video_fd = open(video_device, O_RDWR);

  89.     if (video_fd < 0) {

  90.         perror(video_device);

  91.         goto fail;

  92.     }

  93.     

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

  95.         perror("VIDIOCGCAP");

  96.         goto fail;

  97.     }

  98. 

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

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

  101.         goto fail;

  102.     }

  103. 

  104.     desired_palette = -1;

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

  106.         desired_palette = VIDEO_PALETTE_YUV420P;

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

  108.         desired_palette = VIDEO_PALETTE_YUV422;

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

  110.         desired_palette = VIDEO_PALETTE_RGB24;

  111.     }    

  112.     

  113.     /* unmute audio */

  114.     audio.audio = 0;

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

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

  117.     audio.flags &= ~VIDEO_AUDIO_MUTE;

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

  119. 

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

  121.     if (ret < 0) {

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

  123.         struct video_window win;

  124.         struct video_picture pict;

  125.         int val;

  126. 

  127.         win.x = 0;

  128.         win.y = 0;

  129.         win.width = width;

  130.         win.height = height;

  131.         win.chromakey = -1;

  132.         win.flags = 0;

  133. 

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

  135. 

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

  137. #if 0

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

  139.                pict.colour,

  140.                pict.hue,

  141.                pict.brightness,

  142.                pict.contrast,

  143.                pict.whiteness);

  144. #endif        

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

  146.         pict.palette = desired_palette;

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

  148.             pict.palette=VIDEO_PALETTE_YUV420P;

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

  150.             if (ret < 0) {

  151.                 pict.palette=VIDEO_PALETTE_YUV422;

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

  153.                 if (ret < 0) {

  154.                     pict.palette=VIDEO_PALETTE_RGB24;

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

  156.                     if (ret < 0) 

  157.                         goto fail1;

  158.                 }

  159.             }

  160.         }

  161. 

  162.         s->frame_format = pict.palette;

  163. 

  164.         val = 1;

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

  166. 

  167.         s->time_frame = av_gettime();

  168.         s->use_mmap = 0;

  169.         

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

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

  172.             if (aiw_init(s) < 0)

  173.                 goto fail;

  174.             s->aiw_enabled = 1;

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

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

  177.             s->frame_format = VIDEO_PALETTE_YUV420P;

  178.         }

  179.     } else {

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

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

  182.             perror("mmap");

  183.             goto fail;

  184.         }

  185.         s->gb_frame = 0;

  186.         s->time_frame = av_gettime();

  187.         

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

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

  190.         s->gb_buf.height = height;

  191.         s->gb_buf.width = width;

  192.         s->gb_buf.format = desired_palette;

  193. 

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

  195.             s->gb_buf.format = VIDEO_PALETTE_YUV420P;

  196.             

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

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

  199.                 /* try YUV422 */

  200.                 s->gb_buf.format = VIDEO_PALETTE_YUV422;

  201.                 

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

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

  204.                     /* try RGB24 */

  205.                     s->gb_buf.format = VIDEO_PALETTE_RGB24;

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

  207.                 }

  208.             }

  209.         }

  210.         if (ret < 0) {

  211.             if (errno != EAGAIN) {

  212.             fail1:

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

  214.             } else {

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

  216.             }

  217.             goto fail;

  218.         }

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

  220.         s->use_mmap = 1;

  221.     }

  222. 

  223.     switch(s->frame_format) {

  224.     case VIDEO_PALETTE_YUV420P:

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

  226.         st->codec.pix_fmt = PIX_FMT_YUV420P;

  227.         break;

  228.     case VIDEO_PALETTE_YUV422:

  229.         frame_size = width * height * 2;

  230.         st->codec.pix_fmt = PIX_FMT_YUV422;

  231.         break;

  232.     case VIDEO_PALETTE_RGB24:

  233.         frame_size = width * height * 3;

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

  235.         break;

  236.     default:

  237.         goto fail;

  238.     }

  239.     s->fd = video_fd;

  240.     s->frame_size = frame_size;

  241.     

  242.     st->codec.codec_type = CODEC_TYPE_VIDEO;

  243.     st->codec.codec_id = CODEC_ID_RAWVIDEO;

  244.     st->codec.width = width;

  245.     st->codec.height = height;

  246.     st->codec.frame_rate      = frame_rate;

  247.     st->codec.frame_rate_base = frame_rate_base;

  248.     

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

  250. 

  251.     return 0;

  252.  fail:

  253.     if (video_fd >= 0)

  254.         close(video_fd);

  255.     av_free(st);

  256.     return -EIO;

  257. }

  258. 

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

  260. {

  261.     uint8_t *ptr;

  262. 

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

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

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

  266.         if (errno == EAGAIN)

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

  268.         else

  269.             perror("VIDIOCMCAPTURE");

  270.         return -EIO;

  271.     }

  272. 

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

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

  275. 

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

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

  278. 

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

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

  281. 

  282.     return s->frame_size;

  283. }

  284. 

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

  286. {

  287.     VideoData *s = s1->priv_data;

  288.     int64_t curtime, delay;

  289.     struct timespec ts;

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

  291. 

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

  293.     s->time_frame += per_frame;

  294. 

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

  296.     for(;;) {

  297.         curtime = av_gettime();

  298.         delay = s->time_frame - curtime;

  299.         if (delay <= 0) {

  300.             if (delay < -per_frame) {

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

  302.                 s->time_frame += per_frame;

  303.             }

  304.             break;

  305.         }    

  306.         ts.tv_sec = delay / 1000000;

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

  308.         nanosleep(&ts, NULL);

  309.     }

  310. 

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

  312.         return -EIO;

  313. 

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

  315. 

  316.     /* read one frame */

  317.     if (s->aiw_enabled) {

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

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

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

  321.     } else {

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

  323.             return -EIO;

  324.         return s->frame_size;

  325.     }

  326. }

  327. 

  328. static int grab_read_close(AVFormatContext *s1)

  329. {

  330.     VideoData *s = s1->priv_data;

  331. 

  332.     if (s->aiw_enabled)

  333.         aiw_close(s);

  334. 

  335.     if (s->use_mmap)

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

  337. 

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

  339.        return its state correctly */

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

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

  342. 

  343.     close(s->fd);

  344.     return 0;

  345. }

  346. 

  347. static AVInputFormat video_grab_device_format = {

  348.     "video4linux",

  349.     "video grab",

  350.     sizeof(VideoData),

  351.     NULL,

  352.     grab_read_header,

  353.     grab_read_packet,

  354.     grab_read_close,

  355.     .flags = AVFMT_NOFILE,

  356. };

  357. 

  358. /* All in Wonder specific stuff */

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

  360. 

  361. static int aiw_init(VideoData *s)

  362. {

  363.     int width, height;

  364. 

  365.     width = s->width;

  366.     height = s->height;

  367. 

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

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

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

  371.         

  372.         s->deint=0;

  373.         s->halfw=0;

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

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

  376.     } else {

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

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

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

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

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

  382.         goto fail;

  383.     }

  384. 

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

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

  387.     } else {

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

  389.     }

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

  391. 

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

  393.     if (!s->lum_m4_mem)

  394.         goto fail;

  395.     return 0;

  396.  fail:

  397.     av_freep(&s->src_mem);

  398.     av_freep(&s->lum_m4_mem);

  399.     return -1;

  400. }

  401. 

  402. #ifdef HAVE_MMX

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

  404. 

  405. #define LINE_WITH_UV \

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

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

  408.                     movq_r2r(mm0, mm4); \

  409.                     punpcklbw_r2r(mm1,mm0); \

  410.                     punpckhbw_r2r(mm1,mm4); \

  411.                     movq_r2r(mm0,mm5); \

  412.                     punpcklbw_r2r(mm4,mm0); \

  413.                     punpckhbw_r2r(mm4,mm5); \

  414.                     movq_r2r(mm0,mm1); \

  415.                     punpcklbw_r2r(mm5,mm1); \

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

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

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

  419.                     movq_r2r(mm2,mm4); \

  420.                     punpcklbw_r2r(mm1,mm2); \

  421.                     punpckhbw_r2r(mm1,mm4); \

  422.                     movq_r2r(mm2,mm3); \

  423.                     punpcklbw_r2r(mm4,mm2); \

  424.                     punpckhbw_r2r(mm4,mm3); \

  425.                     movq_r2r(mm2,mm1); \

  426.                     punpcklbw_r2r(mm3,mm1); \

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

  428.                     punpckhdq_r2r(mm2,mm0); \

  429.                     punpckhdq_r2r(mm3,mm5); \

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

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

  432. 

  433. #define LINE_NO_UV \

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

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

  436.                     movq_r2r(mm0, mm4);\

  437.                     punpcklbw_r2r(mm1,mm0); \

  438.                     punpckhbw_r2r(mm1,mm4);\

  439.                     movq_r2r(mm0,mm5);\

  440.                     punpcklbw_r2r(mm4,mm0);\

  441.                     punpckhbw_r2r(mm4,mm5);\

  442.                     movq_r2r(mm0,mm1);\

  443.                     punpcklbw_r2r(mm5,mm1);\

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

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

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

  447.                     movq_r2r(mm2,mm4);\

  448.                     punpcklbw_r2r(mm1,mm2);\

  449.                     punpckhbw_r2r(mm1,mm4);\

  450.                     movq_r2r(mm2,mm3);\

  451.                     punpcklbw_r2r(mm4,mm2);\

  452.                     punpckhbw_r2r(mm4,mm3);\

  453.                     movq_r2r(mm2,mm1);\

  454.                     punpcklbw_r2r(mm3,mm1);\

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

  456. 

  457. #define LINE_WITHUV_AVG \

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

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

  460.                     movq_r2r(mm0, mm4);\

  461.                     punpcklbw_r2r(mm1,mm0);\

  462.                     punpckhbw_r2r(mm1,mm4);\

  463.                     movq_r2r(mm0,mm5);\

  464.                     punpcklbw_r2r(mm4,mm0);\

  465.                     punpckhbw_r2r(mm4,mm5);\

  466.                     movq_r2r(mm0,mm1);\

  467.                     movq_r2r(mm5,mm2);\

  468.                     punpcklbw_r2r(mm7,mm1);\

  469.                     punpcklbw_r2r(mm7,mm2);\

  470.                     paddw_r2r(mm6,mm1);\

  471.                     paddw_r2r(mm2,mm1);\

  472.                     psraw_i2r(1,mm1);\

  473.                     packuswb_r2r(mm7,mm1);\

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

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

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

  477.                     movq_r2r(mm2,mm4);\

  478.                     punpcklbw_r2r(mm1,mm2);\

  479.                     punpckhbw_r2r(mm1,mm4);\

  480.                     movq_r2r(mm2,mm3);\

  481.                     punpcklbw_r2r(mm4,mm2);\

  482.                     punpckhbw_r2r(mm4,mm3);\

  483.                     movq_r2r(mm2,mm1);\

  484.                     movq_r2r(mm3,mm4);\

  485.                     punpcklbw_r2r(mm7,mm1);\

  486.                     punpcklbw_r2r(mm7,mm4);\

  487.                     paddw_r2r(mm6,mm1);\

  488.                     paddw_r2r(mm4,mm1);\

  489.                     psraw_i2r(1,mm1);\

  490.                     packuswb_r2r(mm7,mm1);\

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

  492.                     punpckhbw_r2r(mm7,mm0);\

  493.                     punpckhbw_r2r(mm7,mm2);\

  494.                     paddw_r2r(mm6,mm0);\

  495.                     paddw_r2r(mm2,mm0);\

  496.                     psraw_i2r(1,mm0);\

  497.                     packuswb_r2r(mm7,mm0);\

  498.                     punpckhbw_r2r(mm7,mm5);\

  499.                     punpckhbw_r2r(mm7,mm3);\

  500.                     paddw_r2r(mm6,mm5);\

  501.                     paddw_r2r(mm3,mm5);\

  502.                     psraw_i2r(1,mm5);\

  503.                     packuswb_r2r(mm7,mm5);\

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

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

  506. 

  507. #define LINE_NOUV_AVG \

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

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

  510.                     pand_r2r(mm5,mm0);\

  511.                     pand_r2r(mm5,mm1);\

  512.                     pmaddwd_r2r(mm6,mm0);\

  513.                     pmaddwd_r2r(mm6,mm1);\

  514.                     packssdw_r2r(mm1,mm0);\

  515.                     paddw_r2r(mm6,mm0);\

  516.                     psraw_i2r(1,mm0);\

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

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

  519.                     pand_r2r(mm5,mm2);\

  520.                     pand_r2r(mm5,mm3);\

  521.                     pmaddwd_r2r(mm6,mm2);\

  522.                     pmaddwd_r2r(mm6,mm3);\

  523.                     packssdw_r2r(mm3,mm2);\

  524.                     paddw_r2r(mm6,mm2);\

  525.                     psraw_i2r(1,mm2);\

  526.                     packuswb_r2r(mm2,mm0);\

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

  528. 

  529. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

  535.                     punpcklbw_r2r(mm7,mm0);\

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

  537.                     punpcklbw_r2r(mm7,mm1);\

  538.                     punpcklbw_r2r(mm7,mm2);\

  539.                     punpcklbw_r2r(mm7,mm3);\

  540.                     punpcklbw_r2r(mm7,mm4);\

  541.                     psllw_i2r(2,mm1);\

  542.                     psllw_i2r(1,mm2);\

  543.                     paddw_r2r(mm6,mm1);\

  544.                     psllw_i2r(2,mm3);\

  545.                     paddw_r2r(mm2,mm1);\

  546.                     paddw_r2r(mm4,mm0);\

  547.                     paddw_r2r(mm3,mm1);\

  548.                     psubusw_r2r(mm0,mm1);\

  549.                     psrlw_i2r(3,mm1);\

  550.                     packuswb_r2r(mm7,mm1);\

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

  552. 

  553. #else

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

  555. 

  556. #define LINE_WITH_UV \

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

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

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

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

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

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

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

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

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

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

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

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

  569. 

  570. #define LINE_NO_UV \

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

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

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

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

  575. 

  576. #define LINE_WITHUV_AVG \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  593. 

  594. #define LINE_NOUV_AVG \

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

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

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

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

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

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

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

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

  603. 

  604. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

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

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

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

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

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

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

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

  617. 

  618. #endif

  619. 

  620. 

  621. /* Read two fields separately. */

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

  623. {

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

  625.     int h;

  626. #ifndef HAVE_MMX

  627.     int sum;

  628. #endif

  629.     uint8_t* src = s->src_mem;

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

  631.     lum=data;

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

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

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

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

  636.             usleep(100);

  637.         }

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

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

  640.                 LINE_WITH_UV

  641.                     }

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

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

  644.                 LINE_NO_UV

  645.                     }

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

  647.         }

  648.         /*

  649.          * Do last two lines

  650.          */

  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.         /* drop second field */

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

  660.             usleep(100);

  661.         }

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

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

  664.         }

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

  666. #ifdef HAVE_MMX

  667.         mmx_t rounder;

  668.         mmx_t masker;

  669.         rounder.uw[0]=1;

  670.         rounder.uw[1]=1;

  671.         rounder.uw[2]=1;

  672.         rounder.uw[3]=1;

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

  674.         masker.ub[1]=0;

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

  676.         masker.ub[3]=0;

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

  678.         masker.ub[5]=0;

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

  680.         masker.ub[7]=0;

  681.         pxor_r2r(mm7,mm7);

  682.         movq_m2r(rounder,mm6);

  683. #endif

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

  685.             usleep(100);

  686.         }

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

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

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

  690.                 LINE_WITHUV_AVG

  691.                     }

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

  693. #ifdef HAVE_MMX

  694.             movq_m2r(masker,mm5);

  695. #endif

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

  697.                 LINE_NOUV_AVG

  698.                     }

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

  700.         }

  701.         /*

  702.  * Do last two lines

  703.  */

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

  705.             LINE_WITHUV_AVG

  706.                 }

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

  708. #ifdef HAVE_MMX

  709.         movq_m2r(masker,mm5);

  710. #endif

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

  712.             LINE_NOUV_AVG

  713.                 }

  714.         /* drop second field */

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

  716.             usleep(100);

  717.         }

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

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

  720.         }

  721.     } else {

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

  723. #ifdef HAVE_MMX

  724.         mmx_t rounder;

  725.         rounder.uw[0]=4;

  726.         rounder.uw[1]=4;

  727.         rounder.uw[2]=4;

  728.         rounder.uw[3]=4;

  729.         movq_m2r(rounder,mm6);

  730.         pxor_r2r(mm7,mm7);

  731. #else

  732.         uint8_t *cm = cropTbl + MAX_NEG_CROP;

  733. #endif

  734. 

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

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

  737.             usleep(100);

  738.         }

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

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

  741.                 LINE_WITH_UV

  742.                     }

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

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

  745.             lum += s->width;

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

  747.                 LINE_WITH_UV

  748.                     }

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

  750.             lum += s->width;

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

  752.         }

  753.         /*

  754.  * Do last two lines

  755.  */

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

  757.             LINE_WITH_UV

  758.                 }

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

  760.         lum += s->width;

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

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

  763.             LINE_WITH_UV

  764.                 }

  765.         /*

  766.  *

  767.  * SECOND FIELD

  768.  *

  769.  */

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

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

  772.             usleep(10);

  773.         }

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

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

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

  777.                 LINE_NO_UV

  778.                     }

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

  780.             /* skip a luminance line */

  781.             lum += s->width;

  782.         }

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

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

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

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

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

  788.             lum_m4=s->lum_m4_mem;

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

  790.                 LINE_NO_UV

  791. 

  792.                     DEINT_LINE_LUM(0)

  793.                     DEINT_LINE_LUM(4)

  794.                     DEINT_LINE_LUM(8)

  795.                     DEINT_LINE_LUM(12)

  796.                     }

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

  798.             /* skip a luminance line */

  799.             lum += s->width;

  800.             lum_m1 += s->width;

  801.             lum_m2 += s->width;

  802.             lum_m3 += s->width;

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

  804.         }

  805.         /*

  806.  * Do last line

  807.  */

  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.     }

  818. #ifdef HAVE_MMX

  819.     emms();

  820. #endif

  821.     return s->frame_size;

  822. }

  823. 

  824. static int aiw_close(VideoData *s)

  825. {

  826.     av_freep(&s->lum_m4_mem);

  827.     av_freep(&s->src_mem);

  828.     return 0;

  829. }

  830. 

  831. int video_grab_init(void)

  832. {

  833.     av_register_input_format(&video_grab_device_format);

  834.     return 0;

  835. }