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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. 

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

  71.         return -1;

  72.     

  73.     width = ap->width;

  74.     height = ap->height;

  75.     frame_rate      = ap->frame_rate;

  76.     frame_rate_base = ap->frame_rate_base;

  77. 

  78.     st = av_new_stream(s1, 0);

  79.     if (!st)

  80.         return -ENOMEM;

  81. 

  82.     s->width = width;

  83.     s->height = height;

  84.     s->frame_rate      = frame_rate;

  85.     s->frame_rate_base = frame_rate_base;

  86. 

  87.     video_device = ap->device;

  88.     if (!video_device)

  89.         video_device = "/dev/video";

  90.     video_fd = open(video_device, O_RDWR);

  91.     if (video_fd < 0) {

  92.         perror(video_device);

  93.         goto fail;

  94.     }

  95.     

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

  97.         perror("VIDIOCGCAP");

  98.         goto fail;

  99.     }

  100. 

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

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

  103.         goto fail;

  104.     }

  105. 

  106.     desired_palette = -1;

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

  108.         desired_palette = VIDEO_PALETTE_YUV420P;

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

  110.         desired_palette = VIDEO_PALETTE_YUV422;

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

  112.         desired_palette = VIDEO_PALETTE_RGB24;

  113.     }    

  114. 

  115.     /* set tv standard */

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

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

  118. 	    tuner.mode = VIDEO_MODE_PAL;

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

  120. 	    tuner.mode = VIDEO_MODE_SECAM;

  121. 	else

  122. 	    tuner.mode = VIDEO_MODE_NTSC;

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

  124.     }

  125.     

  126.     /* unmute audio */

  127.     audio.audio = 0;

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

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

  130.     audio.flags &= ~VIDEO_AUDIO_MUTE;

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

  132. 

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

  134.     if (ret < 0) {

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

  136.         struct video_window win;

  137.         struct video_picture pict;

  138.         int val;

  139. 

  140.         win.x = 0;

  141.         win.y = 0;

  142.         win.width = width;

  143.         win.height = height;

  144.         win.chromakey = -1;

  145.         win.flags = 0;

  146. 

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

  148. 

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

  150. #if 0

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

  152.                pict.colour,

  153.                pict.hue,

  154.                pict.brightness,

  155.                pict.contrast,

  156.                pict.whiteness);

  157. #endif        

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

  159.         pict.palette = desired_palette;

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

  161.             pict.palette=VIDEO_PALETTE_YUV420P;

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

  163.             if (ret < 0) {

  164.                 pict.palette=VIDEO_PALETTE_YUV422;

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

  166.                 if (ret < 0) {

  167.                     pict.palette=VIDEO_PALETTE_RGB24;

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

  169.                     if (ret < 0) 

  170.                         goto fail1;

  171.                 }

  172.             }

  173.         }

  174. 

  175.         s->frame_format = pict.palette;

  176. 

  177.         val = 1;

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

  179. 

  180.         s->time_frame = av_gettime();

  181.         s->use_mmap = 0;

  182.         

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

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

  185.             if (aiw_init(s) < 0)

  186.                 goto fail;

  187.             s->aiw_enabled = 1;

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

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

  190.             s->frame_format = VIDEO_PALETTE_YUV420P;

  191.         }

  192.     } else {

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

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

  195.             perror("mmap");

  196.             goto fail;

  197.         }

  198.         s->gb_frame = 0;

  199.         s->time_frame = av_gettime();

  200.         

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

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

  203.         s->gb_buf.height = height;

  204.         s->gb_buf.width = width;

  205.         s->gb_buf.format = desired_palette;

  206. 

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

  208.             s->gb_buf.format = VIDEO_PALETTE_YUV420P;

  209.             

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

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

  212.                 /* try YUV422 */

  213.                 s->gb_buf.format = VIDEO_PALETTE_YUV422;

  214.                 

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

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

  217.                     /* try RGB24 */

  218.                     s->gb_buf.format = VIDEO_PALETTE_RGB24;

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

  220.                 }

  221.             }

  222.         }

  223.         if (ret < 0) {

  224.             if (errno != EAGAIN) {

  225.             fail1:

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

  227.             } else {

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

  229.             }

  230.             goto fail;

  231.         }

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

  233.         s->use_mmap = 1;

  234.     }

  235. 

  236.     switch(s->frame_format) {

  237.     case VIDEO_PALETTE_YUV420P:

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

  239.         st->codec.pix_fmt = PIX_FMT_YUV420P;

  240.         break;

  241.     case VIDEO_PALETTE_YUV422:

  242.         frame_size = width * height * 2;

  243.         st->codec.pix_fmt = PIX_FMT_YUV422;

  244.         break;

  245.     case VIDEO_PALETTE_RGB24:

  246.         frame_size = width * height * 3;

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

  248.         break;

  249.     default:

  250.         goto fail;

  251.     }

  252.     s->fd = video_fd;

  253.     s->frame_size = frame_size;

  254.     

  255.     st->codec.codec_type = CODEC_TYPE_VIDEO;

  256.     st->codec.codec_id = CODEC_ID_RAWVIDEO;

  257.     st->codec.width = width;

  258.     st->codec.height = height;

  259.     st->codec.frame_rate      = frame_rate;

  260.     st->codec.frame_rate_base = frame_rate_base;

  261.     

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

  263. 

  264.     return 0;

  265.  fail:

  266.     if (video_fd >= 0)

  267.         close(video_fd);

  268.     av_free(st);

  269.     return -EIO;

  270. }

  271. 

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

  273. {

  274.     uint8_t *ptr;

  275. 

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

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

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

  279.         if (errno == EAGAIN)

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

  281.         else

  282.             perror("VIDIOCMCAPTURE");

  283.         return -EIO;

  284.     }

  285. 

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

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

  288. 

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

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

  291. 

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

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

  294. 

  295.     return s->frame_size;

  296. }

  297. 

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

  299. {

  300.     VideoData *s = s1->priv_data;

  301.     int64_t curtime, delay;

  302.     struct timespec ts;

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

  304. 

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

  306.     s->time_frame += per_frame;

  307. 

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

  309.     for(;;) {

  310.         curtime = av_gettime();

  311.         delay = s->time_frame - curtime;

  312.         if (delay <= 0) {

  313.             if (delay < -per_frame) {

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

  315.                 s->time_frame += per_frame;

  316.             }

  317.             break;

  318.         }    

  319.         ts.tv_sec = delay / 1000000;

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

  321.         nanosleep(&ts, NULL);

  322.     }

  323. 

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

  325.         return -EIO;

  326. 

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

  328. 

  329.     /* read one frame */

  330.     if (s->aiw_enabled) {

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

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

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

  334.     } else {

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

  336.             return -EIO;

  337.         return s->frame_size;

  338.     }

  339. }

  340. 

  341. static int grab_read_close(AVFormatContext *s1)

  342. {

  343.     VideoData *s = s1->priv_data;

  344. 

  345.     if (s->aiw_enabled)

  346.         aiw_close(s);

  347. 

  348.     if (s->use_mmap)

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

  350. 

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

  352.        return its state correctly */

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

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

  355. 

  356.     close(s->fd);

  357.     return 0;

  358. }

  359. 

  360. static AVInputFormat video_grab_device_format = {

  361.     "video4linux",

  362.     "video grab",

  363.     sizeof(VideoData),

  364.     NULL,

  365.     grab_read_header,

  366.     grab_read_packet,

  367.     grab_read_close,

  368.     .flags = AVFMT_NOFILE,

  369. };

  370. 

  371. /* All in Wonder specific stuff */

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

  373. 

  374. static int aiw_init(VideoData *s)

  375. {

  376.     int width, height;

  377. 

  378.     width = s->width;

  379.     height = s->height;

  380. 

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

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

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

  384.         

  385.         s->deint=0;

  386.         s->halfw=0;

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

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

  389.     } else {

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

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

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

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

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

  395.         goto fail;

  396.     }

  397. 

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

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

  400.     } else {

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

  402.     }

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

  404. 

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

  406.     if (!s->lum_m4_mem)

  407.         goto fail;

  408.     return 0;

  409.  fail:

  410.     av_freep(&s->src_mem);

  411.     av_freep(&s->lum_m4_mem);

  412.     return -1;

  413. }

  414. 

  415. #ifdef HAVE_MMX

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

  417. 

  418. #define LINE_WITH_UV \

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

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

  421.                     movq_r2r(mm0, mm4); \

  422.                     punpcklbw_r2r(mm1,mm0); \

  423.                     punpckhbw_r2r(mm1,mm4); \

  424.                     movq_r2r(mm0,mm5); \

  425.                     punpcklbw_r2r(mm4,mm0); \

  426.                     punpckhbw_r2r(mm4,mm5); \

  427.                     movq_r2r(mm0,mm1); \

  428.                     punpcklbw_r2r(mm5,mm1); \

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

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

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

  432.                     movq_r2r(mm2,mm4); \

  433.                     punpcklbw_r2r(mm1,mm2); \

  434.                     punpckhbw_r2r(mm1,mm4); \

  435.                     movq_r2r(mm2,mm3); \

  436.                     punpcklbw_r2r(mm4,mm2); \

  437.                     punpckhbw_r2r(mm4,mm3); \

  438.                     movq_r2r(mm2,mm1); \

  439.                     punpcklbw_r2r(mm3,mm1); \

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

  441.                     punpckhdq_r2r(mm2,mm0); \

  442.                     punpckhdq_r2r(mm3,mm5); \

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

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

  445. 

  446. #define LINE_NO_UV \

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

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

  449.                     movq_r2r(mm0, mm4);\

  450.                     punpcklbw_r2r(mm1,mm0); \

  451.                     punpckhbw_r2r(mm1,mm4);\

  452.                     movq_r2r(mm0,mm5);\

  453.                     punpcklbw_r2r(mm4,mm0);\

  454.                     punpckhbw_r2r(mm4,mm5);\

  455.                     movq_r2r(mm0,mm1);\

  456.                     punpcklbw_r2r(mm5,mm1);\

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

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

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

  460.                     movq_r2r(mm2,mm4);\

  461.                     punpcklbw_r2r(mm1,mm2);\

  462.                     punpckhbw_r2r(mm1,mm4);\

  463.                     movq_r2r(mm2,mm3);\

  464.                     punpcklbw_r2r(mm4,mm2);\

  465.                     punpckhbw_r2r(mm4,mm3);\

  466.                     movq_r2r(mm2,mm1);\

  467.                     punpcklbw_r2r(mm3,mm1);\

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

  469. 

  470. #define LINE_WITHUV_AVG \

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

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

  473.                     movq_r2r(mm0, mm4);\

  474.                     punpcklbw_r2r(mm1,mm0);\

  475.                     punpckhbw_r2r(mm1,mm4);\

  476.                     movq_r2r(mm0,mm5);\

  477.                     punpcklbw_r2r(mm4,mm0);\

  478.                     punpckhbw_r2r(mm4,mm5);\

  479.                     movq_r2r(mm0,mm1);\

  480.                     movq_r2r(mm5,mm2);\

  481.                     punpcklbw_r2r(mm7,mm1);\

  482.                     punpcklbw_r2r(mm7,mm2);\

  483.                     paddw_r2r(mm6,mm1);\

  484.                     paddw_r2r(mm2,mm1);\

  485.                     psraw_i2r(1,mm1);\

  486.                     packuswb_r2r(mm7,mm1);\

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

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

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

  490.                     movq_r2r(mm2,mm4);\

  491.                     punpcklbw_r2r(mm1,mm2);\

  492.                     punpckhbw_r2r(mm1,mm4);\

  493.                     movq_r2r(mm2,mm3);\

  494.                     punpcklbw_r2r(mm4,mm2);\

  495.                     punpckhbw_r2r(mm4,mm3);\

  496.                     movq_r2r(mm2,mm1);\

  497.                     movq_r2r(mm3,mm4);\

  498.                     punpcklbw_r2r(mm7,mm1);\

  499.                     punpcklbw_r2r(mm7,mm4);\

  500.                     paddw_r2r(mm6,mm1);\

  501.                     paddw_r2r(mm4,mm1);\

  502.                     psraw_i2r(1,mm1);\

  503.                     packuswb_r2r(mm7,mm1);\

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

  505.                     punpckhbw_r2r(mm7,mm0);\

  506.                     punpckhbw_r2r(mm7,mm2);\

  507.                     paddw_r2r(mm6,mm0);\

  508.                     paddw_r2r(mm2,mm0);\

  509.                     psraw_i2r(1,mm0);\

  510.                     packuswb_r2r(mm7,mm0);\

  511.                     punpckhbw_r2r(mm7,mm5);\

  512.                     punpckhbw_r2r(mm7,mm3);\

  513.                     paddw_r2r(mm6,mm5);\

  514.                     paddw_r2r(mm3,mm5);\

  515.                     psraw_i2r(1,mm5);\

  516.                     packuswb_r2r(mm7,mm5);\

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

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

  519. 

  520. #define LINE_NOUV_AVG \

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

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

  523.                     pand_r2r(mm5,mm0);\

  524.                     pand_r2r(mm5,mm1);\

  525.                     pmaddwd_r2r(mm6,mm0);\

  526.                     pmaddwd_r2r(mm6,mm1);\

  527.                     packssdw_r2r(mm1,mm0);\

  528.                     paddw_r2r(mm6,mm0);\

  529.                     psraw_i2r(1,mm0);\

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

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

  532.                     pand_r2r(mm5,mm2);\

  533.                     pand_r2r(mm5,mm3);\

  534.                     pmaddwd_r2r(mm6,mm2);\

  535.                     pmaddwd_r2r(mm6,mm3);\

  536.                     packssdw_r2r(mm3,mm2);\

  537.                     paddw_r2r(mm6,mm2);\

  538.                     psraw_i2r(1,mm2);\

  539.                     packuswb_r2r(mm2,mm0);\

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

  541. 

  542. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

  548.                     punpcklbw_r2r(mm7,mm0);\

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

  550.                     punpcklbw_r2r(mm7,mm1);\

  551.                     punpcklbw_r2r(mm7,mm2);\

  552.                     punpcklbw_r2r(mm7,mm3);\

  553.                     punpcklbw_r2r(mm7,mm4);\

  554.                     psllw_i2r(2,mm1);\

  555.                     psllw_i2r(1,mm2);\

  556.                     paddw_r2r(mm6,mm1);\

  557.                     psllw_i2r(2,mm3);\

  558.                     paddw_r2r(mm2,mm1);\

  559.                     paddw_r2r(mm4,mm0);\

  560.                     paddw_r2r(mm3,mm1);\

  561.                     psubusw_r2r(mm0,mm1);\

  562.                     psrlw_i2r(3,mm1);\

  563.                     packuswb_r2r(mm7,mm1);\

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

  565. 

  566. #else

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

  568. 

  569. #define LINE_WITH_UV \

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

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

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

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

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

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

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

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

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

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

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

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

  582. 

  583. #define LINE_NO_UV \

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

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

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

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

  588. 

  589. #define LINE_WITHUV_AVG \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  606. 

  607. #define LINE_NOUV_AVG \

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

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

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

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

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

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

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

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

  616. 

  617. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

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

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

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

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

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

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

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

  630. 

  631. #endif

  632. 

  633. 

  634. /* Read two fields separately. */

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

  636. {

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

  638.     int h;

  639. #ifndef HAVE_MMX

  640.     int sum;

  641. #endif

  642.     uint8_t* src = s->src_mem;

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

  644.     lum=data;

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

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

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

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

  649.             usleep(100);

  650.         }

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

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

  653.                 LINE_WITH_UV

  654.                     }

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

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

  657.                 LINE_NO_UV

  658.                     }

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

  660.         }

  661.         /*

  662.          * Do last two lines

  663.          */

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

  665.             LINE_WITH_UV

  666.                 }

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

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

  669.             LINE_NO_UV

  670.                 }

  671.         /* drop second field */

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

  673.             usleep(100);

  674.         }

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

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

  677.         }

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

  679. #ifdef HAVE_MMX

  680.         mmx_t rounder;

  681.         mmx_t masker;

  682.         rounder.uw[0]=1;

  683.         rounder.uw[1]=1;

  684.         rounder.uw[2]=1;

  685.         rounder.uw[3]=1;

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

  687.         masker.ub[1]=0;

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

  689.         masker.ub[3]=0;

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

  691.         masker.ub[5]=0;

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

  693.         masker.ub[7]=0;

  694.         pxor_r2r(mm7,mm7);

  695.         movq_m2r(rounder,mm6);

  696. #endif

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

  698.             usleep(100);

  699.         }

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

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

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

  703.                 LINE_WITHUV_AVG

  704.                     }

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

  706. #ifdef HAVE_MMX

  707.             movq_m2r(masker,mm5);

  708. #endif

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

  710.                 LINE_NOUV_AVG

  711.                     }

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

  713.         }

  714.         /*

  715.  * Do last two lines

  716.  */

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

  718.             LINE_WITHUV_AVG

  719.                 }

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

  721. #ifdef HAVE_MMX

  722.         movq_m2r(masker,mm5);

  723. #endif

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

  725.             LINE_NOUV_AVG

  726.                 }

  727.         /* drop second field */

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

  729.             usleep(100);

  730.         }

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

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

  733.         }

  734.     } else {

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

  736. #ifdef HAVE_MMX

  737.         mmx_t rounder;

  738.         rounder.uw[0]=4;

  739.         rounder.uw[1]=4;

  740.         rounder.uw[2]=4;

  741.         rounder.uw[3]=4;

  742.         movq_m2r(rounder,mm6);

  743.         pxor_r2r(mm7,mm7);

  744. #else

  745.         uint8_t *cm = cropTbl + MAX_NEG_CROP;

  746. #endif

  747. 

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

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

  750.             usleep(100);

  751.         }

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

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

  754.                 LINE_WITH_UV

  755.                     }

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

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

  758.             lum += s->width;

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

  760.                 LINE_WITH_UV

  761.                     }

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

  763.             lum += s->width;

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

  765.         }

  766.         /*

  767.  * Do last two lines

  768.  */

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

  770.             LINE_WITH_UV

  771.                 }

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

  773.         lum += s->width;

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

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

  776.             LINE_WITH_UV

  777.                 }

  778.         /*

  779.  *

  780.  * SECOND FIELD

  781.  *

  782.  */

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

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

  785.             usleep(10);

  786.         }

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

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

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

  790.                 LINE_NO_UV

  791.                     }

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

  793.             /* skip a luminance line */

  794.             lum += s->width;

  795.         }

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

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

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

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

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

  801.             lum_m4=s->lum_m4_mem;

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

  803.                 LINE_NO_UV

  804. 

  805.                     DEINT_LINE_LUM(0)

  806.                     DEINT_LINE_LUM(4)

  807.                     DEINT_LINE_LUM(8)

  808.                     DEINT_LINE_LUM(12)

  809.                     }

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

  811.             /* skip a luminance line */

  812.             lum += s->width;

  813.             lum_m1 += s->width;

  814.             lum_m2 += s->width;

  815.             lum_m3 += s->width;

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

  817.         }

  818.         /*

  819.  * Do last line

  820.  */

  821.         lum_m4=s->lum_m4_mem;

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

  823.             LINE_NO_UV

  824. 

  825.                 DEINT_LINE_LUM(0)

  826.                 DEINT_LINE_LUM(4)

  827.                 DEINT_LINE_LUM(8)

  828.                 DEINT_LINE_LUM(12)

  829.                 }

  830.     }

  831. #ifdef HAVE_MMX

  832.     emms();

  833. #endif

  834.     return s->frame_size;

  835. }

  836. 

  837. static int aiw_close(VideoData *s)

  838. {

  839.     av_freep(&s->lum_m4_mem);

  840.     av_freep(&s->src_mem);

  841.     return 0;

  842. }

  843. 

  844. int video_grab_init(void)

  845. {

  846.     av_register_input_format(&video_grab_device_format);

  847.     return 0;

  848. }