bktr.c 11 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 Fabrice Bellard
  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 "libavformat/internal.h"
  27. #include "libavutil/internal.h"
  28. #include "libavutil/log.h"
  29. #include "libavutil/opt.h"
  30. #include "libavutil/parseutils.h"
  31. #include "libavutil/time.h"
  32. #if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
  33. # include <dev/bktr/ioctl_meteor.h>
  34. # include <dev/bktr/ioctl_bt848.h>
  35. #elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
  36. # include <machine/ioctl_meteor.h>
  37. # include <machine/ioctl_bt848.h>
  38. #elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
  39. # include <dev/video/meteor/ioctl_meteor.h>
  40. # include <dev/video/bktr/ioctl_bt848.h>
  41. #elif HAVE_DEV_IC_BT8XX_H
  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. #include <stdint.h>
  51. #include "avdevice.h"
  52. typedef struct VideoData {
  53. AVClass *class;
  54. int video_fd;
  55. int tuner_fd;
  56. int width, height;
  57. uint64_t per_frame;
  58. int standard;
  59. char *framerate; /**< Set by a private option. */
  60. } VideoData;
  61. #define PAL 1
  62. #define PALBDGHI 1
  63. #define NTSC 2
  64. #define NTSCM 2
  65. #define SECAM 3
  66. #define PALN 4
  67. #define PALM 5
  68. #define NTSCJ 6
  69. /* PAL is 768 x 576. NTSC is 640 x 480 */
  70. #define PAL_HEIGHT 576
  71. #define SECAM_HEIGHT 576
  72. #define NTSC_HEIGHT 480
  73. #ifndef VIDEO_FORMAT
  74. #define VIDEO_FORMAT NTSC
  75. #endif
  76. static const int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
  77. METEOR_DEV3, METEOR_DEV_SVIDEO };
  78. uint8_t *video_buf;
  79. size_t video_buf_size;
  80. uint64_t last_frame_time;
  81. volatile sig_atomic_t nsignals;
  82. static void catchsignal(int signal)
  83. {
  84. nsignals++;
  85. return;
  86. }
  87. static av_cold int bktr_init(const char *video_device, int width, int height,
  88. int format, int *video_fd, int *tuner_fd, int idev, double frequency)
  89. {
  90. struct meteor_geomet geo;
  91. int h_max;
  92. long ioctl_frequency;
  93. char *arg;
  94. int c;
  95. struct sigaction act, old;
  96. int ret;
  97. char errbuf[128];
  98. if (idev < 0 || idev > 4)
  99. {
  100. arg = getenv ("BKTR_DEV");
  101. if (arg)
  102. idev = atoi (arg);
  103. if (idev < 0 || idev > 4)
  104. idev = 1;
  105. }
  106. if (format < 1 || format > 6)
  107. {
  108. arg = getenv ("BKTR_FORMAT");
  109. if (arg)
  110. format = atoi (arg);
  111. if (format < 1 || format > 6)
  112. format = VIDEO_FORMAT;
  113. }
  114. if (frequency <= 0)
  115. {
  116. arg = getenv ("BKTR_FREQUENCY");
  117. if (arg)
  118. frequency = atof (arg);
  119. if (frequency <= 0)
  120. frequency = 0.0;
  121. }
  122. memset(&act, 0, sizeof(act));
  123. sigemptyset(&act.sa_mask);
  124. act.sa_handler = catchsignal;
  125. sigaction(SIGUSR1, &act, &old);
  126. *tuner_fd = avpriv_open("/dev/tuner0", O_RDONLY);
  127. if (*tuner_fd < 0)
  128. av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
  129. *video_fd = avpriv_open(video_device, O_RDONLY);
  130. if (*video_fd < 0) {
  131. ret = AVERROR(errno);
  132. av_strerror(ret, errbuf, sizeof(errbuf));
  133. av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, errbuf);
  134. return ret;
  135. }
  136. geo.rows = height;
  137. geo.columns = width;
  138. geo.frames = 1;
  139. geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
  140. switch (format) {
  141. case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
  142. case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
  143. case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
  144. case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
  145. case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
  146. case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
  147. default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
  148. }
  149. if (height <= h_max / 2)
  150. geo.oformat |= METEOR_GEO_EVEN_ONLY;
  151. if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
  152. ret = AVERROR(errno);
  153. av_strerror(ret, errbuf, sizeof(errbuf));
  154. av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", errbuf);
  155. return ret;
  156. }
  157. if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
  158. ret = AVERROR(errno);
  159. av_strerror(ret, errbuf, sizeof(errbuf));
  160. av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", errbuf);
  161. return ret;
  162. }
  163. c = bktr_dev[idev];
  164. if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
  165. ret = AVERROR(errno);
  166. av_strerror(ret, errbuf, sizeof(errbuf));
  167. av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", errbuf);
  168. return ret;
  169. }
  170. video_buf_size = width * height * 12 / 8;
  171. video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
  172. PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
  173. if (video_buf == MAP_FAILED) {
  174. ret = AVERROR(errno);
  175. av_strerror(ret, errbuf, sizeof(errbuf));
  176. av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", errbuf);
  177. return ret;
  178. }
  179. if (frequency != 0.0) {
  180. ioctl_frequency = (unsigned long)(frequency*16);
  181. if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
  182. av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
  183. }
  184. c = AUDIO_UNMUTE;
  185. if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
  186. av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
  187. c = METEOR_CAP_CONTINOUS;
  188. ioctl(*video_fd, METEORCAPTUR, &c);
  189. c = SIGUSR1;
  190. ioctl(*video_fd, METEORSSIGNAL, &c);
  191. return 0;
  192. }
  193. static void bktr_getframe(uint64_t per_frame)
  194. {
  195. uint64_t curtime;
  196. curtime = av_gettime_relative();
  197. if (!last_frame_time
  198. || ((last_frame_time + per_frame) > curtime)) {
  199. if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
  200. if (!nsignals)
  201. av_log(NULL, AV_LOG_INFO,
  202. "SLEPT NO signals - %d microseconds late\n",
  203. (int)(av_gettime_relative() - last_frame_time - per_frame));
  204. }
  205. }
  206. nsignals = 0;
  207. last_frame_time = curtime;
  208. }
  209. /* note: we support only one picture read at a time */
  210. static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
  211. {
  212. VideoData *s = s1->priv_data;
  213. if (av_new_packet(pkt, video_buf_size) < 0)
  214. return AVERROR(EIO);
  215. bktr_getframe(s->per_frame);
  216. pkt->pts = av_gettime();
  217. memcpy(pkt->data, video_buf, video_buf_size);
  218. return video_buf_size;
  219. }
  220. static int grab_read_header(AVFormatContext *s1)
  221. {
  222. VideoData *s = s1->priv_data;
  223. AVStream *st;
  224. AVRational framerate;
  225. int ret = 0;
  226. if (!s->framerate)
  227. switch (s->standard) {
  228. case PAL: s->framerate = av_strdup("pal"); break;
  229. case NTSC: s->framerate = av_strdup("ntsc"); break;
  230. case SECAM: s->framerate = av_strdup("25"); break;
  231. default:
  232. av_log(s1, AV_LOG_ERROR, "Unknown standard.\n");
  233. ret = AVERROR(EINVAL);
  234. goto out;
  235. }
  236. if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
  237. av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate);
  238. goto out;
  239. }
  240. st = avformat_new_stream(s1, NULL);
  241. if (!st) {
  242. ret = AVERROR(ENOMEM);
  243. goto out;
  244. }
  245. avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
  246. s->per_frame = ((uint64_t)1000000 * framerate.den) / framerate.num;
  247. st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
  248. st->codecpar->format = AV_PIX_FMT_YUV420P;
  249. st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
  250. st->codecpar->width = s->width;
  251. st->codecpar->height = s->height;
  252. st->avg_frame_rate = framerate;
  253. if (bktr_init(s1->url, s->width, s->height, s->standard,
  254. &s->video_fd, &s->tuner_fd, -1, 0.0) < 0) {
  255. ret = AVERROR(EIO);
  256. goto out;
  257. }
  258. nsignals = 0;
  259. last_frame_time = 0;
  260. out:
  261. return ret;
  262. }
  263. static int grab_read_close(AVFormatContext *s1)
  264. {
  265. VideoData *s = s1->priv_data;
  266. int c;
  267. c = METEOR_CAP_STOP_CONT;
  268. ioctl(s->video_fd, METEORCAPTUR, &c);
  269. close(s->video_fd);
  270. c = AUDIO_MUTE;
  271. ioctl(s->tuner_fd, BT848_SAUDIO, &c);
  272. close(s->tuner_fd);
  273. munmap((caddr_t)video_buf, video_buf_size);
  274. return 0;
  275. }
  276. #define OFFSET(x) offsetof(VideoData, x)
  277. #define DEC AV_OPT_FLAG_DECODING_PARAM
  278. static const AVOption options[] = {
  279. { "standard", "", offsetof(VideoData, standard), AV_OPT_TYPE_INT, {.i64 = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
  280. { "PAL", "", 0, AV_OPT_TYPE_CONST, {.i64 = PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
  281. { "NTSC", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
  282. { "SECAM", "", 0, AV_OPT_TYPE_CONST, {.i64 = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
  283. { "PALN", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALN}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
  284. { "PALM", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
  285. { "NTSCJ", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
  286. { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC },
  287. { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
  288. { NULL },
  289. };
  290. static const AVClass bktr_class = {
  291. .class_name = "BKTR grab indev",
  292. .item_name = av_default_item_name,
  293. .option = options,
  294. .version = LIBAVUTIL_VERSION_INT,
  295. .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
  296. };
  297. const AVInputFormat ff_bktr_demuxer = {
  298. .name = "bktr",
  299. .long_name = NULL_IF_CONFIG_SMALL("video grab"),
  300. .priv_data_size = sizeof(VideoData),
  301. .read_header = grab_read_header,
  302. .read_packet = grab_read_packet,
  303. .read_close = grab_read_close,
  304. .flags = AVFMT_NOFILE,
  305. .priv_class = &bktr_class,
  306. };