grab_bktr.c 8.3 KB

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  1. /*
  2. * *BSD video grab interface
  3. * Copyright (c) 2002 Steve O'Hara-Smith
  4. * based on
  5. * Linux video grab interface
  6. * Copyright (c) 2000,2001 Gerard Lantau.
  7. * and
  8. * simple_grab.c Copyright (c) 1999 Roger Hardiman
  9. *
  10. * This file is part of FFmpeg.
  11. *
  12. * FFmpeg is free software; you can redistribute it and/or
  13. * modify it under the terms of the GNU Lesser General Public
  14. * License as published by the Free Software Foundation; either
  15. * version 2.1 of the License, or (at your option) any later version.
  16. *
  17. * FFmpeg is distributed in the hope that it will be useful,
  18. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  20. * Lesser General Public License for more details.
  21. *
  22. * You should have received a copy of the GNU Lesser General Public
  23. * License along with FFmpeg; if not, write to the Free Software
  24. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  25. */
  26. #include "avformat.h"
  27. #if defined(__FreeBSD__)
  28. # if __FreeBSD__ >= 502100
  29. # include <dev/bktr/ioctl_meteor.h>
  30. # include <dev/bktr/ioctl_bt848.h>
  31. # else
  32. # include <machine/ioctl_meteor.h>
  33. # include <machine/ioctl_bt848.h>
  34. # endif
  35. #elif defined(__FreeBSD_kernel__)
  36. # include <dev/bktr/ioctl_meteor.h>
  37. # include <dev/bktr/ioctl_bt848.h>
  38. #elif defined(__DragonFly__)
  39. # include <dev/video/meteor/ioctl_meteor.h>
  40. # include <dev/video/bktr/ioctl_bt848.h>
  41. #else
  42. # include <dev/ic/bt8xx.h>
  43. #endif
  44. #include <unistd.h>
  45. #include <fcntl.h>
  46. #include <sys/ioctl.h>
  47. #include <sys/mman.h>
  48. #include <sys/time.h>
  49. #include <signal.h>
  50. typedef struct {
  51. int video_fd;
  52. int tuner_fd;
  53. int width, height;
  54. int frame_rate;
  55. int frame_rate_base;
  56. u_int64_t per_frame;
  57. } VideoData;
  58. #define PAL 1
  59. #define PALBDGHI 1
  60. #define NTSC 2
  61. #define NTSCM 2
  62. #define SECAM 3
  63. #define PALN 4
  64. #define PALM 5
  65. #define NTSCJ 6
  66. /* PAL is 768 x 576. NTSC is 640 x 480 */
  67. #define PAL_HEIGHT 576
  68. #define SECAM_HEIGHT 576
  69. #define NTSC_HEIGHT 480
  70. #ifndef VIDEO_FORMAT
  71. #define VIDEO_FORMAT NTSC
  72. #endif
  73. static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
  74. METEOR_DEV3, METEOR_DEV_SVIDEO };
  75. uint8_t *video_buf;
  76. size_t video_buf_size;
  77. u_int64_t last_frame_time;
  78. volatile sig_atomic_t nsignals;
  79. static void catchsignal(int signal)
  80. {
  81. nsignals++;
  82. return;
  83. }
  84. static int bktr_init(const char *video_device, int width, int height,
  85. int format, int *video_fd, int *tuner_fd, int idev, double frequency)
  86. {
  87. struct meteor_geomet geo;
  88. int h_max;
  89. long ioctl_frequency;
  90. char *arg;
  91. int c;
  92. struct sigaction act, old;
  93. if (idev < 0 || idev > 4)
  94. {
  95. arg = getenv ("BKTR_DEV");
  96. if (arg)
  97. idev = atoi (arg);
  98. if (idev < 0 || idev > 4)
  99. idev = 1;
  100. }
  101. if (format < 1 || format > 6)
  102. {
  103. arg = getenv ("BKTR_FORMAT");
  104. if (arg)
  105. format = atoi (arg);
  106. if (format < 1 || format > 6)
  107. format = VIDEO_FORMAT;
  108. }
  109. if (frequency <= 0)
  110. {
  111. arg = getenv ("BKTR_FREQUENCY");
  112. if (arg)
  113. frequency = atof (arg);
  114. if (frequency <= 0)
  115. frequency = 0.0;
  116. }
  117. memset(&act, 0, sizeof(act));
  118. sigemptyset(&act.sa_mask);
  119. act.sa_handler = catchsignal;
  120. sigaction(SIGUSR1, &act, &old);
  121. *tuner_fd = open("/dev/tuner0", O_RDONLY);
  122. if (*tuner_fd < 0)
  123. perror("Warning: Tuner not opened, continuing");
  124. *video_fd = open(video_device, O_RDONLY);
  125. if (*video_fd < 0) {
  126. perror(video_device);
  127. return -1;
  128. }
  129. geo.rows = height;
  130. geo.columns = width;
  131. geo.frames = 1;
  132. geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
  133. switch (format) {
  134. case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
  135. case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
  136. case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
  137. case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
  138. case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
  139. case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
  140. default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
  141. }
  142. if (height <= h_max / 2)
  143. geo.oformat |= METEOR_GEO_EVEN_ONLY;
  144. if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
  145. perror("METEORSETGEO");
  146. return -1;
  147. }
  148. if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
  149. perror("BT848SFMT");
  150. return -1;
  151. }
  152. c = bktr_dev[idev];
  153. if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
  154. perror("METEORSINPUT");
  155. return -1;
  156. }
  157. video_buf_size = width * height * 12 / 8;
  158. video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
  159. PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
  160. if (video_buf == MAP_FAILED) {
  161. perror("mmap");
  162. return -1;
  163. }
  164. if (frequency != 0.0) {
  165. ioctl_frequency = (unsigned long)(frequency*16);
  166. if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
  167. perror("TVTUNER_SETFREQ");
  168. }
  169. c = AUDIO_UNMUTE;
  170. if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
  171. perror("TVTUNER_SAUDIO");
  172. c = METEOR_CAP_CONTINOUS;
  173. ioctl(*video_fd, METEORCAPTUR, &c);
  174. c = SIGUSR1;
  175. ioctl(*video_fd, METEORSSIGNAL, &c);
  176. return 0;
  177. }
  178. static void bktr_getframe(u_int64_t per_frame)
  179. {
  180. u_int64_t curtime;
  181. curtime = av_gettime();
  182. if (!last_frame_time
  183. || ((last_frame_time + per_frame) > curtime)) {
  184. if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
  185. if (!nsignals)
  186. av_log(NULL, AV_LOG_INFO,
  187. "SLEPT NO signals - %d microseconds late\n",
  188. (int)(av_gettime() - last_frame_time - per_frame));
  189. }
  190. }
  191. nsignals = 0;
  192. last_frame_time = curtime;
  193. }
  194. /* note: we support only one picture read at a time */
  195. static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
  196. {
  197. VideoData *s = s1->priv_data;
  198. if (av_new_packet(pkt, video_buf_size) < 0)
  199. return -EIO;
  200. bktr_getframe(s->per_frame);
  201. pkt->pts = av_gettime();
  202. memcpy(pkt->data, video_buf, video_buf_size);
  203. return video_buf_size;
  204. }
  205. static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
  206. {
  207. VideoData *s = s1->priv_data;
  208. AVStream *st;
  209. int width, height;
  210. int frame_rate;
  211. int frame_rate_base;
  212. int format = -1;
  213. const char *video_device;
  214. if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0)
  215. return -1;
  216. width = ap->width;
  217. height = ap->height;
  218. frame_rate = ap->time_base.den;
  219. frame_rate_base = ap->time_base.num;
  220. video_device = ap->device;
  221. if (!video_device)
  222. video_device = "/dev/bktr0";
  223. st = av_new_stream(s1, 0);
  224. if (!st)
  225. return -ENOMEM;
  226. av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
  227. s->width = width;
  228. s->height = height;
  229. s->frame_rate = frame_rate;
  230. s->frame_rate_base = frame_rate_base;
  231. s->per_frame = ((u_int64_t)1000000 * s->frame_rate_base) / s->frame_rate;
  232. st->codec->codec_type = CODEC_TYPE_VIDEO;
  233. st->codec->pix_fmt = PIX_FMT_YUV420P;
  234. st->codec->codec_id = CODEC_ID_RAWVIDEO;
  235. st->codec->width = width;
  236. st->codec->height = height;
  237. st->codec->time_base.den = frame_rate;
  238. st->codec->time_base.num = frame_rate_base;
  239. if (ap->standard) {
  240. if (!strcasecmp(ap->standard, "pal"))
  241. format = PAL;
  242. else if (!strcasecmp(ap->standard, "secam"))
  243. format = SECAM;
  244. else if (!strcasecmp(ap->standard, "ntsc"))
  245. format = NTSC;
  246. }
  247. if (bktr_init(video_device, width, height, format,
  248. &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0)
  249. return -EIO;
  250. nsignals = 0;
  251. last_frame_time = 0;
  252. return 0;
  253. }
  254. static int grab_read_close(AVFormatContext *s1)
  255. {
  256. VideoData *s = s1->priv_data;
  257. int c;
  258. c = METEOR_CAP_STOP_CONT;
  259. ioctl(s->video_fd, METEORCAPTUR, &c);
  260. close(s->video_fd);
  261. c = AUDIO_MUTE;
  262. ioctl(s->tuner_fd, BT848_SAUDIO, &c);
  263. close(s->tuner_fd);
  264. munmap((caddr_t)video_buf, video_buf_size);
  265. return 0;
  266. }
  267. AVInputFormat video_grab_device_demuxer = {
  268. "bktr",
  269. "video grab",
  270. sizeof(VideoData),
  271. NULL,
  272. grab_read_header,
  273. grab_read_packet,
  274. grab_read_close,
  275. .flags = AVFMT_NOFILE,
  276. };