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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.     int64_t time_frame;

  35.     int frame_size;

  36.     struct video_capability video_cap;

  37.     struct video_audio audio_saved;

  38.     uint8_t *video_buf;

  39.     struct video_mbuf gb_buffers;

  40.     struct video_mmap gb_buf;

  41.     int gb_frame;

  42. 

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

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

  45.     int aiw_enabled;

  46.     int deint;

  47.     int halfw;

  48.     uint8_t *src_mem;

  49.     uint8_t *lum_m4_mem;

  50. } VideoData;

  51. 

  52. static int aiw_init(VideoData *s);

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

  54. static int aiw_close(VideoData *s);

  55. 

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

  57. {

  58.     VideoData *s = s1->priv_data;

  59.     AVStream *st;

  60.     int width, height;

  61.     int video_fd, frame_size;

  62.     int ret, frame_rate;

  63.     int desired_palette;

  64.     struct video_audio audio;

  65.     const char *video_device;

  66. 

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

  68.         return -1;

  69.     

  70.     width = ap->width;

  71.     height = ap->height;

  72.     frame_rate = ap->frame_rate;

  73. 

  74.     st = av_new_stream(s1, 0);

  75.     if (!st)

  76.         return -ENOMEM;

  77. 

  78.     s->width = width;

  79.     s->height = height;

  80.     s->frame_rate = frame_rate;

  81. 

  82.     video_device = ap->device;

  83.     if (!video_device)

  84.         video_device = "/dev/video";

  85.     video_fd = open(video_device, O_RDWR);

  86.     if (video_fd < 0) {

  87.         perror(video_device);

  88.         goto fail;

  89.     }

  90.     

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

  92.         perror("VIDIOCGCAP");

  93.         goto fail;

  94.     }

  95. 

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

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

  98.         goto fail;

  99.     }

  100. 

  101.     desired_palette = -1;

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

  103.         desired_palette = VIDEO_PALETTE_YUV420P;

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

  105.         desired_palette = VIDEO_PALETTE_YUV422;

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

  107.         desired_palette = VIDEO_PALETTE_RGB24;

  108.     }    

  109.     

  110.     /* unmute audio */

  111.     audio.audio = 0;

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

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

  114.     audio.flags &= ~VIDEO_AUDIO_MUTE;

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

  116. 

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

  118.     if (ret < 0) {

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

  120.         struct video_window win;

  121.         struct video_picture pict;

  122.         int val;

  123. 

  124.         win.x = 0;

  125.         win.y = 0;

  126.         win.width = width;

  127.         win.height = height;

  128.         win.chromakey = -1;

  129.         win.flags = 0;

  130. 

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

  132. 

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

  134. #if 0

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

  136.                pict.colour,

  137.                pict.hue,

  138.                pict.brightness,

  139.                pict.contrast,

  140.                pict.whiteness);

  141. #endif        

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

  143.         pict.palette = desired_palette;

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

  145.             pict.palette=VIDEO_PALETTE_YUV420P;

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

  147.             if (ret < 0) {

  148.                 pict.palette=VIDEO_PALETTE_YUV422;

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

  150.                 if (ret < 0) {

  151.                     pict.palette=VIDEO_PALETTE_RGB24;

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

  153.                     if (ret < 0) 

  154.                         goto fail1;

  155.                 }

  156.             }

  157.         }

  158. 

  159.         s->frame_format = pict.palette;

  160. 

  161.         val = 1;

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

  163. 

  164.         s->time_frame = av_gettime();

  165.         s->use_mmap = 0;

  166.         

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

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

  169.             if (aiw_init(s) < 0)

  170.                 goto fail;

  171.             s->aiw_enabled = 1;

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

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

  174.             s->frame_format = VIDEO_PALETTE_YUV420P;

  175.         }

  176.     } else {

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

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

  179.             perror("mmap");

  180.             goto fail;

  181.         }

  182.         s->gb_frame = 0;

  183.         s->time_frame = av_gettime();

  184.         

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

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

  187.         s->gb_buf.height = height;

  188.         s->gb_buf.width = width;

  189.         s->gb_buf.format = desired_palette;

  190. 

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

  192.             s->gb_buf.format = VIDEO_PALETTE_YUV420P;

  193.             

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

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

  196.                 /* try YUV422 */

  197.                 s->gb_buf.format = VIDEO_PALETTE_YUV422;

  198.                 

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

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

  201.                     /* try RGB24 */

  202.                     s->gb_buf.format = VIDEO_PALETTE_RGB24;

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

  204.                 }

  205.             }

  206.         }

  207.         if (ret < 0) {

  208.             if (errno != EAGAIN) {

  209.             fail1:

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

  211.             } else {

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

  213.             }

  214.             goto fail;

  215.         }

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

  217.         s->use_mmap = 1;

  218.     }

  219. 

  220.     switch(s->frame_format) {

  221.     case VIDEO_PALETTE_YUV420P:

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

  223.         st->codec.pix_fmt = PIX_FMT_YUV420P;

  224.         break;

  225.     case VIDEO_PALETTE_YUV422:

  226.         frame_size = width * height * 2;

  227.         st->codec.pix_fmt = PIX_FMT_YUV422;

  228.         break;

  229.     case VIDEO_PALETTE_RGB24:

  230.         frame_size = width * height * 3;

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

  232.         break;

  233.     default:

  234.         goto fail;

  235.     }

  236.     s->fd = video_fd;

  237.     s->frame_size = frame_size;

  238.     

  239.     st->codec.codec_type = CODEC_TYPE_VIDEO;

  240.     st->codec.codec_id = CODEC_ID_RAWVIDEO;

  241.     st->codec.width = width;

  242.     st->codec.height = height;

  243.     st->codec.frame_rate = frame_rate;

  244.     

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

  246. 

  247.     return 0;

  248.  fail:

  249.     if (video_fd >= 0)

  250.         close(video_fd);

  251.     av_free(st);

  252.     return -EIO;

  253. }

  254. 

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

  256. {

  257.     uint8_t *ptr;

  258. 

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

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

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

  262.         if (errno == EAGAIN)

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

  264.         else

  265.             perror("VIDIOCMCAPTURE");

  266.         return -EIO;

  267.     }

  268. 

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

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

  271. 

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

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

  274. 

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

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

  277. 

  278.     return s->frame_size;

  279. }

  280. 

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

  282. {

  283.     VideoData *s = s1->priv_data;

  284.     int64_t curtime, delay;

  285.     struct timespec ts;

  286.     int64_t per_frame = (int64_t_C(1000000) * FRAME_RATE_BASE) / s->frame_rate;

  287. 

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

  289.     s->time_frame += per_frame;

  290. 

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

  292.     for(;;) {

  293.         curtime = av_gettime();

  294.         delay = s->time_frame - curtime;

  295.         if (delay <= 0) {

  296.             if (delay < -per_frame) {

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

  298.                 s->time_frame += per_frame;

  299.             }

  300.             break;

  301.         }    

  302.         ts.tv_sec = delay / 1000000;

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

  304.         nanosleep(&ts, NULL);

  305.     }

  306. 

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

  308.         return -EIO;

  309. 

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

  311. 

  312.     /* read one frame */

  313.     if (s->aiw_enabled) {

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

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

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

  317.     } else {

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

  319.             return -EIO;

  320.         return s->frame_size;

  321.     }

  322. }

  323. 

  324. static int grab_read_close(AVFormatContext *s1)

  325. {

  326.     VideoData *s = s1->priv_data;

  327. 

  328.     if (s->aiw_enabled)

  329.         aiw_close(s);

  330. 

  331.     if (s->use_mmap)

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

  333. 

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

  335.        return its state correctly */

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

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

  338. 

  339.     close(s->fd);

  340.     return 0;

  341. }

  342. 

  343. static AVInputFormat video_grab_device_format = {

  344.     "video4linux",

  345.     "video grab",

  346.     sizeof(VideoData),

  347.     NULL,

  348.     grab_read_header,

  349.     grab_read_packet,

  350.     grab_read_close,

  351.     .flags = AVFMT_NOFILE,

  352. };

  353. 

  354. /* All in Wonder specific stuff */

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

  356. 

  357. static int aiw_init(VideoData *s)

  358. {

  359.     int width, height;

  360. 

  361.     width = s->width;

  362.     height = s->height;

  363. 

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

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

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

  367.         

  368.         s->deint=0;

  369.         s->halfw=0;

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

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

  372.     } else {

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

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

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

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

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

  378.         goto fail;

  379.     }

  380. 

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

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

  383.     } else {

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

  385.     }

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

  387. 

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

  389.     if (!s->lum_m4_mem)

  390.         goto fail;

  391.     return 0;

  392.  fail:

  393.     av_freep(&s->src_mem);

  394.     av_freep(&s->lum_m4_mem);

  395.     return -1;

  396. }

  397. 

  398. #ifdef HAVE_MMX

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

  400. 

  401. #define LINE_WITH_UV \

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

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

  404.                     movq_r2r(mm0, mm4); \

  405.                     punpcklbw_r2r(mm1,mm0); \

  406.                     punpckhbw_r2r(mm1,mm4); \

  407.                     movq_r2r(mm0,mm5); \

  408.                     punpcklbw_r2r(mm4,mm0); \

  409.                     punpckhbw_r2r(mm4,mm5); \

  410.                     movq_r2r(mm0,mm1); \

  411.                     punpcklbw_r2r(mm5,mm1); \

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

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

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

  415.                     movq_r2r(mm2,mm4); \

  416.                     punpcklbw_r2r(mm1,mm2); \

  417.                     punpckhbw_r2r(mm1,mm4); \

  418.                     movq_r2r(mm2,mm3); \

  419.                     punpcklbw_r2r(mm4,mm2); \

  420.                     punpckhbw_r2r(mm4,mm3); \

  421.                     movq_r2r(mm2,mm1); \

  422.                     punpcklbw_r2r(mm3,mm1); \

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

  424.                     punpckhdq_r2r(mm2,mm0); \

  425.                     punpckhdq_r2r(mm3,mm5); \

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

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

  428. 

  429. #define LINE_NO_UV \

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

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

  432.                     movq_r2r(mm0, mm4);\

  433.                     punpcklbw_r2r(mm1,mm0); \

  434.                     punpckhbw_r2r(mm1,mm4);\

  435.                     movq_r2r(mm0,mm5);\

  436.                     punpcklbw_r2r(mm4,mm0);\

  437.                     punpckhbw_r2r(mm4,mm5);\

  438.                     movq_r2r(mm0,mm1);\

  439.                     punpcklbw_r2r(mm5,mm1);\

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

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

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

  443.                     movq_r2r(mm2,mm4);\

  444.                     punpcklbw_r2r(mm1,mm2);\

  445.                     punpckhbw_r2r(mm1,mm4);\

  446.                     movq_r2r(mm2,mm3);\

  447.                     punpcklbw_r2r(mm4,mm2);\

  448.                     punpckhbw_r2r(mm4,mm3);\

  449.                     movq_r2r(mm2,mm1);\

  450.                     punpcklbw_r2r(mm3,mm1);\

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

  452. 

  453. #define LINE_WITHUV_AVG \

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

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

  456.                     movq_r2r(mm0, mm4);\

  457.                     punpcklbw_r2r(mm1,mm0);\

  458.                     punpckhbw_r2r(mm1,mm4);\

  459.                     movq_r2r(mm0,mm5);\

  460.                     punpcklbw_r2r(mm4,mm0);\

  461.                     punpckhbw_r2r(mm4,mm5);\

  462.                     movq_r2r(mm0,mm1);\

  463.                     movq_r2r(mm5,mm2);\

  464.                     punpcklbw_r2r(mm7,mm1);\

  465.                     punpcklbw_r2r(mm7,mm2);\

  466.                     paddw_r2r(mm6,mm1);\

  467.                     paddw_r2r(mm2,mm1);\

  468.                     psraw_i2r(1,mm1);\

  469.                     packuswb_r2r(mm7,mm1);\

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

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

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

  473.                     movq_r2r(mm2,mm4);\

  474.                     punpcklbw_r2r(mm1,mm2);\

  475.                     punpckhbw_r2r(mm1,mm4);\

  476.                     movq_r2r(mm2,mm3);\

  477.                     punpcklbw_r2r(mm4,mm2);\

  478.                     punpckhbw_r2r(mm4,mm3);\

  479.                     movq_r2r(mm2,mm1);\

  480.                     movq_r2r(mm3,mm4);\

  481.                     punpcklbw_r2r(mm7,mm1);\

  482.                     punpcklbw_r2r(mm7,mm4);\

  483.                     paddw_r2r(mm6,mm1);\

  484.                     paddw_r2r(mm4,mm1);\

  485.                     psraw_i2r(1,mm1);\

  486.                     packuswb_r2r(mm7,mm1);\

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

  488.                     punpckhbw_r2r(mm7,mm0);\

  489.                     punpckhbw_r2r(mm7,mm2);\

  490.                     paddw_r2r(mm6,mm0);\

  491.                     paddw_r2r(mm2,mm0);\

  492.                     psraw_i2r(1,mm0);\

  493.                     packuswb_r2r(mm7,mm0);\

  494.                     punpckhbw_r2r(mm7,mm5);\

  495.                     punpckhbw_r2r(mm7,mm3);\

  496.                     paddw_r2r(mm6,mm5);\

  497.                     paddw_r2r(mm3,mm5);\

  498.                     psraw_i2r(1,mm5);\

  499.                     packuswb_r2r(mm7,mm5);\

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

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

  502. 

  503. #define LINE_NOUV_AVG \

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

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

  506.                     pand_r2r(mm5,mm0);\

  507.                     pand_r2r(mm5,mm1);\

  508.                     pmaddwd_r2r(mm6,mm0);\

  509.                     pmaddwd_r2r(mm6,mm1);\

  510.                     packssdw_r2r(mm1,mm0);\

  511.                     paddw_r2r(mm6,mm0);\

  512.                     psraw_i2r(1,mm0);\

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

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

  515.                     pand_r2r(mm5,mm2);\

  516.                     pand_r2r(mm5,mm3);\

  517.                     pmaddwd_r2r(mm6,mm2);\

  518.                     pmaddwd_r2r(mm6,mm3);\

  519.                     packssdw_r2r(mm3,mm2);\

  520.                     paddw_r2r(mm6,mm2);\

  521.                     psraw_i2r(1,mm2);\

  522.                     packuswb_r2r(mm2,mm0);\

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

  524. 

  525. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

  531.                     punpcklbw_r2r(mm7,mm0);\

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

  533.                     punpcklbw_r2r(mm7,mm1);\

  534.                     punpcklbw_r2r(mm7,mm2);\

  535.                     punpcklbw_r2r(mm7,mm3);\

  536.                     punpcklbw_r2r(mm7,mm4);\

  537.                     psllw_i2r(2,mm1);\

  538.                     psllw_i2r(1,mm2);\

  539.                     paddw_r2r(mm6,mm1);\

  540.                     psllw_i2r(2,mm3);\

  541.                     paddw_r2r(mm2,mm1);\

  542.                     paddw_r2r(mm4,mm0);\

  543.                     paddw_r2r(mm3,mm1);\

  544.                     psubusw_r2r(mm0,mm1);\

  545.                     psrlw_i2r(3,mm1);\

  546.                     packuswb_r2r(mm7,mm1);\

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

  548. 

  549. #else

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

  551. 

  552. #define LINE_WITH_UV \

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

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

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

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

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

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

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

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

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

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

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

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

  565. 

  566. #define LINE_NO_UV \

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

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

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

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

  571. 

  572. #define LINE_WITHUV_AVG \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  589. 

  590. #define LINE_NOUV_AVG \

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

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

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

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

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

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

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

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

  599. 

  600. #define DEINT_LINE_LUM(ptroff) \

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

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

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

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

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

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

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

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

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

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

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

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

  613. 

  614. #endif

  615. 

  616. 

  617. /* Read two fields separately. */

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

  619. {

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

  621.     int h;

  622. #ifndef HAVE_MMX

  623.     int sum;

  624. #endif

  625.     uint8_t* src = s->src_mem;

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

  627.     lum=data;

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

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

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

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

  632.             usleep(100);

  633.         }

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

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

  636.                 LINE_WITH_UV

  637.                     }

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

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

  640.                 LINE_NO_UV

  641.                     }

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

  643.         }

  644.         /*

  645.          * Do last two lines

  646.          */

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

  648.             LINE_WITH_UV

  649.                 }

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

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

  652.             LINE_NO_UV

  653.                 }

  654.         /* drop second field */

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

  656.             usleep(100);

  657.         }

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

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

  660.         }

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

  662. #ifdef HAVE_MMX

  663.         mmx_t rounder;

  664.         mmx_t masker;

  665.         rounder.uw[0]=1;

  666.         rounder.uw[1]=1;

  667.         rounder.uw[2]=1;

  668.         rounder.uw[3]=1;

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

  670.         masker.ub[1]=0;

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

  672.         masker.ub[3]=0;

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

  674.         masker.ub[5]=0;

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

  676.         masker.ub[7]=0;

  677.         pxor_r2r(mm7,mm7);

  678.         movq_m2r(rounder,mm6);

  679. #endif

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

  681.             usleep(100);

  682.         }

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

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

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

  686.                 LINE_WITHUV_AVG

  687.                     }

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

  689. #ifdef HAVE_MMX

  690.             movq_m2r(masker,mm5);

  691. #endif

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

  693.                 LINE_NOUV_AVG

  694.                     }

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

  696.         }

  697.         /*

  698.  * Do last two lines

  699.  */

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

  701.             LINE_WITHUV_AVG

  702.                 }

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

  704. #ifdef HAVE_MMX

  705.         movq_m2r(masker,mm5);

  706. #endif

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

  708.             LINE_NOUV_AVG

  709.                 }

  710.         /* drop second field */

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

  712.             usleep(100);

  713.         }

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

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

  716.         }

  717.     } else {

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

  719. #ifdef HAVE_MMX

  720.         mmx_t rounder;

  721.         rounder.uw[0]=4;

  722.         rounder.uw[1]=4;

  723.         rounder.uw[2]=4;

  724.         rounder.uw[3]=4;

  725.         movq_m2r(rounder,mm6);

  726.         pxor_r2r(mm7,mm7);

  727. #else

  728.         uint8_t *cm = cropTbl + MAX_NEG_CROP;

  729. #endif

  730. 

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

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

  733.             usleep(100);

  734.         }

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

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

  737.                 LINE_WITH_UV

  738.                     }

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

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

  741.             lum += s->width;

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

  743.                 LINE_WITH_UV

  744.                     }

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

  746.             lum += s->width;

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

  748.         }

  749.         /*

  750.  * Do last two lines

  751.  */

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

  753.             LINE_WITH_UV

  754.                 }

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

  756.         lum += s->width;

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

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

  759.             LINE_WITH_UV

  760.                 }

  761.         /*

  762.  *

  763.  * SECOND FIELD

  764.  *

  765.  */

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

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

  768.             usleep(10);

  769.         }

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

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

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

  773.                 LINE_NO_UV

  774.                     }

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

  776.             /* skip a luminance line */

  777.             lum += s->width;

  778.         }

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

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

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

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

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

  784.             lum_m4=s->lum_m4_mem;

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

  786.                 LINE_NO_UV

  787. 

  788.                     DEINT_LINE_LUM(0)

  789.                     DEINT_LINE_LUM(4)

  790.                     DEINT_LINE_LUM(8)

  791.                     DEINT_LINE_LUM(12)

  792.                     }

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

  794.             /* skip a luminance line */

  795.             lum += s->width;

  796.             lum_m1 += s->width;

  797.             lum_m2 += s->width;

  798.             lum_m3 += s->width;

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

  800.         }

  801.         /*

  802.  * Do last line

  803.  */

  804.         lum_m4=s->lum_m4_mem;

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

  806.             LINE_NO_UV

  807. 

  808.                 DEINT_LINE_LUM(0)

  809.                 DEINT_LINE_LUM(4)

  810.                 DEINT_LINE_LUM(8)

  811.                 DEINT_LINE_LUM(12)

  812.                 }

  813.     }

  814. #ifdef HAVE_MMX

  815.     emms();

  816. #endif

  817.     return s->frame_size;

  818. }

  819. 

  820. static int aiw_close(VideoData *s)

  821. {

  822.     av_freep(&s->lum_m4_mem);

  823.     av_freep(&s->src_mem);

  824.     return 0;

  825. }

  826. 

  827. int video_grab_init(void)

  828. {

  829.     av_register_input_format(&video_grab_device_format);

  830.     return 0;

  831. }