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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  18.  */

  19. #include "avformat.h"

  20. #include <unistd.h>

  21. #include <fcntl.h>

  22. #include <sys/ioctl.h>

  23. #include <sys/mman.h>

  24. #include <sys/time.h>

  25. #define _LINUX_TIME_H 1

  26. #include <linux/videodev.h>

  27. #include <time.h>

  28. 

  29. typedef struct {

  30.     int fd;

  31.     int frame_format; /* see VIDEO_PALETTE_xxx */

  32.     int use_mmap;

  33.     int width, height;

  34.     int frame_rate;

  35.     int frame_rate_base;

  36.     int64_t time_frame;

  37.     int frame_size;

  38.     struct video_capability video_cap;

  39.     struct video_audio audio_saved;

  40.     uint8_t *video_buf;

  41.     struct video_mbuf gb_buffers;

  42.     struct video_mmap gb_buf;

  43.     int gb_frame;

  44. 

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

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

  47.     int aiw_enabled;

  48.     int deint;

  49.     int halfw;

  50.     uint8_t *src_mem;

  51.     uint8_t *lum_m4_mem;

  52. } VideoData;

  53. 

  54. static int aiw_init(VideoData *s);

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

  56. static int aiw_close(VideoData *s);

  57. 

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

  59. {

  60.     VideoData *s = s1->priv_data;

  61.     AVStream *st;

  62.     int width, height;

  63.     int video_fd, frame_size;

  64.     int ret, frame_rate, frame_rate_base;

  65.     int desired_palette;

  66.     struct video_tuner tuner;

  67.     struct video_audio audio;

  68.     const char *video_device;

  69.     int j;

  70. 

  71.     if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) {

  72.         av_log(s1, AV_LOG_ERROR, "Bad capture size (%dx%d) or wrong time base (%d)\n",

  73.             ap->width, ap->height, ap->time_base.den);

  74. 

  75.         return -1;

  76.     }

  77. 

  78.     width = ap->width;

  79.     height = ap->height;

  80.     frame_rate      = ap->time_base.den;

  81.     frame_rate_base = ap->time_base.num;

  82. 

  83.     if((unsigned)width > 32767 || (unsigned)height > 32767) {

  84.         av_log(s1, AV_LOG_ERROR, "Capture size is out of range: %dx%d\n",

  85.             width, height);

  86. 

  87.         return -1;

  88.     }

  89. 

  90.     st = av_new_stream(s1, 0);

  91.     if (!st)

  92.         return -ENOMEM;

  93.     av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */

  94. 

  95.     s->width = width;

  96.     s->height = height;

  97.     s->frame_rate      = frame_rate;

  98.     s->frame_rate_base = frame_rate_base;

  99. 

  100.     video_device = ap->device;

  101.     if (!video_device)

  102.         video_device = "/dev/video";

  103.     video_fd = open(video_device, O_RDWR);

  104.     if (video_fd < 0) {

  105.         perror(video_device);

  106.         goto fail;

  107.     }

  108. 

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

  110.         perror("VIDIOCGCAP");

  111.         goto fail;

  112.     }

  113. 

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

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

  116.         goto fail;

  117.     }

  118. 

  119.     desired_palette = -1;

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

  121.         desired_palette = VIDEO_PALETTE_YUV420P;

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

  123.         desired_palette = VIDEO_PALETTE_YUV422;

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

  125.         desired_palette = VIDEO_PALETTE_RGB24;

  126.     }

  127. 

  128.     /* set tv standard */

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

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

  131.             tuner.mode = VIDEO_MODE_PAL;

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

  133.             tuner.mode = VIDEO_MODE_SECAM;

  134.         else

  135.             tuner.mode = VIDEO_MODE_NTSC;

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

  137.     }

  138. 

  139.     /* unmute audio */

  140.     audio.audio = 0;

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

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

  143.     audio.flags &= ~VIDEO_AUDIO_MUTE;

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

  145. 

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

  147.     if (ret < 0) {

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

  149.         struct video_window win;

  150.         struct video_picture pict;

  151.         int val;

  152. 

  153.         win.x = 0;

  154.         win.y = 0;

  155.         win.width = width;

  156.         win.height = height;

  157.         win.chromakey = -1;

  158.         win.flags = 0;

  159. 

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

  161. 

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

  163. #if 0

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

  165.                pict.colour,

  166.                pict.hue,

  167.                pict.brightness,

  168.                pict.contrast,

  169.                pict.whiteness);

  170. #endif

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

  172.         pict.palette = desired_palette;

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

  174.             pict.palette=VIDEO_PALETTE_YUV420P;

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

  176.             if (ret < 0) {

  177.                 pict.palette=VIDEO_PALETTE_YUV422;

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

  179.                 if (ret < 0) {

  180.                     pict.palette=VIDEO_PALETTE_RGB24;

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

  182.                     if (ret < 0)

  183.                         goto fail1;

  184.                 }

  185.             }

  186.         }

  187. 

  188.         s->frame_format = pict.palette;

  189. 

  190.         val = 1;

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

  192. 

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

  194.         s->use_mmap = 0;

  195. 

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

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

  198.             if (aiw_init(s) < 0)

  199.                 goto fail;

  200.             s->aiw_enabled = 1;

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

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

  203.             s->frame_format = VIDEO_PALETTE_YUV420P;

  204.         }

  205.     } else {

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

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

  208.             perror("mmap");

  209.             goto fail;

  210.         }

  211.         s->gb_frame = 0;

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

  213. 

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

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

  216.         s->gb_buf.height = height;

  217.         s->gb_buf.width = width;

  218.         s->gb_buf.format = desired_palette;

  219. 

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

  221.             s->gb_buf.format = VIDEO_PALETTE_YUV420P;

  222. 

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

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

  225.                 /* try YUV422 */

  226.                 s->gb_buf.format = VIDEO_PALETTE_YUV422;

  227. 

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

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

  230.                     /* try RGB24 */

  231.                     s->gb_buf.format = VIDEO_PALETTE_RGB24;

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

  233.                 }

  234.             }

  235.         }

  236.         if (ret < 0) {

  237.             if (errno != EAGAIN) {

  238.             fail1:

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

  240.             } else {

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

  242.             }

  243.             goto fail;

  244.         }

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

  246.           s->gb_buf.frame = j;

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

  248.         }

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

  250.         s->use_mmap = 1;

  251.     }

  252. 

  253.     switch(s->frame_format) {

  254.     case VIDEO_PALETTE_YUV420P:

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

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

  257.         break;

  258.     case VIDEO_PALETTE_YUV422:

  259.         frame_size = width * height * 2;

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

  261.         break;

  262.     case VIDEO_PALETTE_RGB24:

  263.         frame_size = width * height * 3;

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

  265.         break;

  266.     default:

  267.         goto fail;

  268.     }

  269.     s->fd = video_fd;

  270.     s->frame_size = frame_size;

  271. 

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

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

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

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

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

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

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

  279. 

  280.     return 0;

  281.  fail:

  282.     if (video_fd >= 0)

  283.         close(video_fd);

  284.     av_free(st);

  285.     return AVERROR_IO;

  286. }

  287. 

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

  289. {

  290.     uint8_t *ptr;

  291. 

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

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

  294. 

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

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

  297. 

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

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

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

  301.         if (errno == EAGAIN)

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

  303.         else

  304.             perror("VIDIOCMCAPTURE");

  305.         return AVERROR_IO;

  306.     }

  307. 

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

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

  310. 

  311.     return s->frame_size;

  312. }

  313. 

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

  315. {

  316.     VideoData *s = s1->priv_data;

  317.     int64_t curtime, delay;

  318.     struct timespec ts;

  319. 

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

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

  322. 

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

  324.     for(;;) {

  325.         curtime = av_gettime();

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

  327.         if (delay <= 0) {

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

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

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

  331.             }

  332.             break;

  333.         }

  334.         ts.tv_sec = delay / 1000000;

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

  336.         nanosleep(&ts, NULL);

  337.     }

  338. 

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

  340.         return AVERROR_IO;

  341. 

  342.     pkt->pts = curtime;

  343. 

  344.     /* read one frame */

  345.     if (s->aiw_enabled) {

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

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

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

  349.     } else {

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

  351.             return AVERROR_IO;

  352.         return s->frame_size;

  353.     }

  354. }

  355. 

  356. static int grab_read_close(AVFormatContext *s1)

  357. {

  358.     VideoData *s = s1->priv_data;

  359. 

  360.     if (s->aiw_enabled)

  361.         aiw_close(s);

  362. 

  363.     if (s->use_mmap)

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

  365. 

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

  367.        return its state correctly */

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

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

  370. 

  371.     close(s->fd);

  372.     return 0;

  373. }

  374. 

  375. static AVInputFormat video_grab_device_format = {

  376.     "video4linux",

  377.     "video grab",

  378.     sizeof(VideoData),

  379.     NULL,

  380.     grab_read_header,

  381.     grab_read_packet,

  382.     grab_read_close,

  383.     .flags = AVFMT_NOFILE,

  384. };

  385. 

  386. /* All in Wonder specific stuff */

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

  388. 

  389. static int aiw_init(VideoData *s)

  390. {

  391.     int width, height;

  392. 

  393.     width = s->width;

  394.     height = s->height;

  395. 

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

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

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

  399. 

  400.         s->deint=0;

  401.         s->halfw=0;

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

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

  404.     } else {

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

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

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

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

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

  410.         goto fail;

  411.     }

  412. 

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

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

  415.     } else {

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

  417.     }

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

  419. 

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

  421.     if (!s->lum_m4_mem)

  422.         goto fail;

  423.     return 0;

  424.  fail:

  425.     av_freep(&s->src_mem);

  426.     av_freep(&s->lum_m4_mem);

  427.     return -1;

  428. }

  429. 

  430. #ifdef HAVE_MMX

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

  432. 

  433. #define LINE_WITH_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.                     punpckhdq_r2r(mm2,mm0); \

  457.                     punpckhdq_r2r(mm3,mm5); \

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

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

  460. 

  461. #define LINE_NO_UV \

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

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

  464.                     movq_r2r(mm0, mm4);\

  465.                     punpcklbw_r2r(mm1,mm0); \

  466.                     punpckhbw_r2r(mm1,mm4);\

  467.                     movq_r2r(mm0,mm5);\

  468.                     punpcklbw_r2r(mm4,mm0);\

  469.                     punpckhbw_r2r(mm4,mm5);\

  470.                     movq_r2r(mm0,mm1);\

  471.                     punpcklbw_r2r(mm5,mm1);\

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

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

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

  475.                     movq_r2r(mm2,mm4);\

  476.                     punpcklbw_r2r(mm1,mm2);\

  477.                     punpckhbw_r2r(mm1,mm4);\

  478.                     movq_r2r(mm2,mm3);\

  479.                     punpcklbw_r2r(mm4,mm2);\

  480.                     punpckhbw_r2r(mm4,mm3);\

  481.                     movq_r2r(mm2,mm1);\

  482.                     punpcklbw_r2r(mm3,mm1);\

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

  484. 

  485. #define LINE_WITHUV_AVG \

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

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

  488.                     movq_r2r(mm0, mm4);\

  489.                     punpcklbw_r2r(mm1,mm0);\

  490.                     punpckhbw_r2r(mm1,mm4);\

  491.                     movq_r2r(mm0,mm5);\

  492.                     punpcklbw_r2r(mm4,mm0);\

  493.                     punpckhbw_r2r(mm4,mm5);\

  494.                     movq_r2r(mm0,mm1);\

  495.                     movq_r2r(mm5,mm2);\

  496.                     punpcklbw_r2r(mm7,mm1);\

  497.                     punpcklbw_r2r(mm7,mm2);\

  498.                     paddw_r2r(mm6,mm1);\

  499.                     paddw_r2r(mm2,mm1);\

  500.                     psraw_i2r(1,mm1);\

  501.                     packuswb_r2r(mm7,mm1);\

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

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

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

  505.                     movq_r2r(mm2,mm4);\

  506.                     punpcklbw_r2r(mm1,mm2);\

  507.                     punpckhbw_r2r(mm1,mm4);\

  508.                     movq_r2r(mm2,mm3);\

  509.                     punpcklbw_r2r(mm4,mm2);\

  510.                     punpckhbw_r2r(mm4,mm3);\

  511.                     movq_r2r(mm2,mm1);\

  512.                     movq_r2r(mm3,mm4);\

  513.                     punpcklbw_r2r(mm7,mm1);\

  514.                     punpcklbw_r2r(mm7,mm4);\

  515.                     paddw_r2r(mm6,mm1);\

  516.                     paddw_r2r(mm4,mm1);\

  517.                     psraw_i2r(1,mm1);\

  518.                     packuswb_r2r(mm7,mm1);\

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

  520.                     punpckhbw_r2r(mm7,mm0);\

  521.                     punpckhbw_r2r(mm7,mm2);\

  522.                     paddw_r2r(mm6,mm0);\

  523.                     paddw_r2r(mm2,mm0);\

  524.                     psraw_i2r(1,mm0);\

  525.                     packuswb_r2r(mm7,mm0);\

  526.                     punpckhbw_r2r(mm7,mm5);\

  527.                     punpckhbw_r2r(mm7,mm3);\

  528.                     paddw_r2r(mm6,mm5);\

  529.                     paddw_r2r(mm3,mm5);\

  530.                     psraw_i2r(1,mm5);\

  531.                     packuswb_r2r(mm7,mm5);\

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

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

  534. 

  535. #define LINE_NOUV_AVG \

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

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

  538.                     pand_r2r(mm5,mm0);\

  539.                     pand_r2r(mm5,mm1);\

  540.                     pmaddwd_r2r(mm6,mm0);\

  541.                     pmaddwd_r2r(mm6,mm1);\

  542.                     packssdw_r2r(mm1,mm0);\

  543.                     paddw_r2r(mm6,mm0);\

  544.                     psraw_i2r(1,mm0);\

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

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

  547.                     pand_r2r(mm5,mm2);\

  548.                     pand_r2r(mm5,mm3);\

  549.                     pmaddwd_r2r(mm6,mm2);\

  550.                     pmaddwd_r2r(mm6,mm3);\

  551.                     packssdw_r2r(mm3,mm2);\

  552.                     paddw_r2r(mm6,mm2);\

  553.                     psraw_i2r(1,mm2);\

  554.                     packuswb_r2r(mm2,mm0);\

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

  556. 

  557. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

  563.                     punpcklbw_r2r(mm7,mm0);\

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

  565.                     punpcklbw_r2r(mm7,mm1);\

  566.                     punpcklbw_r2r(mm7,mm2);\

  567.                     punpcklbw_r2r(mm7,mm3);\

  568.                     punpcklbw_r2r(mm7,mm4);\

  569.                     psllw_i2r(2,mm1);\

  570.                     psllw_i2r(1,mm2);\

  571.                     paddw_r2r(mm6,mm1);\

  572.                     psllw_i2r(2,mm3);\

  573.                     paddw_r2r(mm2,mm1);\

  574.                     paddw_r2r(mm4,mm0);\

  575.                     paddw_r2r(mm3,mm1);\

  576.                     psubusw_r2r(mm0,mm1);\

  577.                     psrlw_i2r(3,mm1);\

  578.                     packuswb_r2r(mm7,mm1);\

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

  580. 

  581. #else

  582. #include "libavcodec/dsputil.h"

  583. 

  584. #define LINE_WITH_UV \

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

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

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

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

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

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

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

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

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

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

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

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

  597. 

  598. #define LINE_NO_UV \

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

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

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

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

  603. 

  604. #define LINE_WITHUV_AVG \

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

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

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

  608.                     sum=(ptr[3]+ptr[7]+1) >> 1;cr[0]=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[9]+ptr[13]+1) >> 1;cb[1]=sum; \

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

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

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

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

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

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

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

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

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

  621. 

  622. #define LINE_NOUV_AVG \

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

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

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

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

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

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

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

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

  631. 

  632. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

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

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

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

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

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

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

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

  645. 

  646. #endif

  647. 

  648. 

  649. /* Read two fields separately. */

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

  651. {

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

  653.     int h;

  654. #ifndef HAVE_MMX

  655.     int sum;

  656. #endif

  657.     uint8_t* src = s->src_mem;

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

  659.     lum=data;

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

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

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

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

  664.             usleep(100);

  665.         }

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

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

  668.                 LINE_WITH_UV

  669.                     }

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

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

  672.                 LINE_NO_UV

  673.                     }

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

  675.         }

  676.         /*

  677.          * Do last two lines

  678.          */

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

  680.             LINE_WITH_UV

  681.                 }

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

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

  684.             LINE_NO_UV

  685.                 }

  686.         /* drop second field */

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

  688.             usleep(100);

  689.         }

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

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

  692.         }

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

  694. #ifdef HAVE_MMX

  695.         mmx_t rounder;

  696.         mmx_t masker;

  697.         rounder.uw[0]=1;

  698.         rounder.uw[1]=1;

  699.         rounder.uw[2]=1;

  700.         rounder.uw[3]=1;

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

  702.         masker.ub[1]=0;

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

  704.         masker.ub[3]=0;

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

  706.         masker.ub[5]=0;

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

  708.         masker.ub[7]=0;

  709.         pxor_r2r(mm7,mm7);

  710.         movq_m2r(rounder,mm6);

  711. #endif

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

  713.             usleep(100);

  714.         }

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

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

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

  728.         }

  729.         /*

  730.  * Do last two lines

  731.  */

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

  733.             LINE_WITHUV_AVG

  734.                 }

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

  736. #ifdef HAVE_MMX

  737.         movq_m2r(masker,mm5);

  738. #endif

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

  740.             LINE_NOUV_AVG

  741.                 }

  742.         /* drop second field */

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

  744.             usleep(100);

  745.         }

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

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

  748.         }

  749.     } else {

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

  751. #ifdef HAVE_MMX

  752.         mmx_t rounder;

  753.         rounder.uw[0]=4;

  754.         rounder.uw[1]=4;

  755.         rounder.uw[2]=4;

  756.         rounder.uw[3]=4;

  757.         movq_m2r(rounder,mm6);

  758.         pxor_r2r(mm7,mm7);

  759. #else

  760.         uint8_t *cm = cropTbl + MAX_NEG_CROP;

  761. #endif

  762. 

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

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

  765.             usleep(100);

  766.         }

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

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

  769.                 LINE_WITH_UV

  770.                     }

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

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

  773.             lum += s->width;

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

  775.                 LINE_WITH_UV

  776.                     }

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

  778.             lum += s->width;

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

  780.         }

  781.         /*

  782.  * Do last two lines

  783.  */

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

  785.             LINE_WITH_UV

  786.                 }

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

  788.         lum += s->width;

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

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

  791.             LINE_WITH_UV

  792.                 }

  793.         /*

  794.  *

  795.  * SECOND FIELD

  796.  *

  797.  */

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

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

  800.             usleep(10);

  801.         }

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

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

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

  805.                 LINE_NO_UV

  806.                     }

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

  808.             /* skip a luminance line */

  809.             lum += s->width;

  810.         }

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

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

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

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

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

  816.             lum_m4=s->lum_m4_mem;

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

  818.                 LINE_NO_UV

  819. 

  820.                     DEINT_LINE_LUM(0)

  821.                     DEINT_LINE_LUM(4)

  822.                     DEINT_LINE_LUM(8)

  823.                     DEINT_LINE_LUM(12)

  824.                     }

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

  826.             /* skip a luminance line */

  827.             lum += s->width;

  828.             lum_m1 += s->width;

  829.             lum_m2 += s->width;

  830.             lum_m3 += s->width;

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

  832.         }

  833.         /*

  834.  * Do last line

  835.  */

  836.         lum_m4=s->lum_m4_mem;

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

  838.             LINE_NO_UV

  839. 

  840.                 DEINT_LINE_LUM(0)

  841.                 DEINT_LINE_LUM(4)

  842.                 DEINT_LINE_LUM(8)

  843.                 DEINT_LINE_LUM(12)

  844.                 }

  845.     }

  846. #ifdef HAVE_MMX

  847.     emms();

  848. #endif

  849.     return s->frame_size;

  850. }

  851. 

  852. static int aiw_close(VideoData *s)

  853. {

  854.     av_freep(&s->lum_m4_mem);

  855.     av_freep(&s->src_mem);

  856.     return 0;

  857. }

  858. 

  859. int video_grab_init(void)

  860. {

  861.     av_register_input_format(&video_grab_device_format);

  862.     return 0;

  863. }