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 27#include "libavformat/internal.h" 28#include "libavutil/internal.h" 29#include "libavutil/log.h" 30#include "libavutil/opt.h" 31#include "libavutil/parseutils.h" 32#include "libavutil/time.h" 33#if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H 34# include <dev/bktr/ioctl_meteor.h> 35# include <dev/bktr/ioctl_bt848.h> 36#elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H 37# include <machine/ioctl_meteor.h> 38# include <machine/ioctl_bt848.h> 39#elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H 40# include <dev/video/meteor/ioctl_meteor.h> 41# include <dev/video/bktr/ioctl_bt848.h> 42#elif HAVE_DEV_IC_BT8XX_H 43# include <dev/ic/bt8xx.h> 44#endif 45#include <unistd.h> 46#include <fcntl.h> 47#include <sys/ioctl.h> 48#include <sys/mman.h> 49#include <sys/time.h> 50#include <signal.h> 51#include <stdint.h> 52#include "avdevice.h" 53 54typedef struct { 55 AVClass *class; 56 int video_fd; 57 int tuner_fd; 58 int width, height; 59 uint64_t per_frame; 60 int standard; 61 char *framerate; /**< Set by a private option. */ 62} VideoData; 63 64 65#define PAL 1 66#define PALBDGHI 1 67#define NTSC 2 68#define NTSCM 2 69#define SECAM 3 70#define PALN 4 71#define PALM 5 72#define NTSCJ 6 73 74/* PAL is 768 x 576. NTSC is 640 x 480 */ 75#define PAL_HEIGHT 576 76#define SECAM_HEIGHT 576 77#define NTSC_HEIGHT 480 78 79#ifndef VIDEO_FORMAT 80#define VIDEO_FORMAT NTSC 81#endif 82 83static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2, 84 METEOR_DEV3, METEOR_DEV_SVIDEO }; 85 86uint8_t *video_buf; 87size_t video_buf_size; 88uint64_t last_frame_time; 89volatile sig_atomic_t nsignals; 90 91 92static void catchsignal(int signal) 93{ 94 nsignals++; 95 return; 96} 97 98static av_cold int bktr_init(const char *video_device, int width, int height, 99 int format, int *video_fd, int *tuner_fd, int idev, double frequency) 100{ 101 struct meteor_geomet geo; 102 int h_max; 103 long ioctl_frequency; 104 char *arg; 105 int c; 106 struct sigaction act = { {0} }, old; 107 108 if (idev < 0 || idev > 4) 109 { 110 arg = getenv ("BKTR_DEV"); 111 if (arg) 112 idev = atoi (arg); 113 if (idev < 0 || idev > 4) 114 idev = 1; 115 } 116 117 if (format < 1 || format > 6) 118 { 119 arg = getenv ("BKTR_FORMAT"); 120 if (arg) 121 format = atoi (arg); 122 if (format < 1 || format > 6) 123 format = VIDEO_FORMAT; 124 } 125 126 if (frequency <= 0) 127 { 128 arg = getenv ("BKTR_FREQUENCY"); 129 if (arg) 130 frequency = atof (arg); 131 if (frequency <= 0) 132 frequency = 0.0; 133 } 134 135 sigemptyset(&act.sa_mask); 136 act.sa_handler = catchsignal; 137 sigaction(SIGUSR1, &act, &old); 138 139 *tuner_fd = avpriv_open("/dev/tuner0", O_RDONLY); 140 if (*tuner_fd < 0) 141 av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno)); 142 143 *video_fd = avpriv_open(video_device, O_RDONLY); 144 if (*video_fd < 0) { 145 av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno)); 146 return -1; 147 } 148 149 geo.rows = height; 150 geo.columns = width; 151 geo.frames = 1; 152 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12; 153 154 switch (format) { 155 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break; 156 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break; 157 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break; 158 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break; 159 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break; 160 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break; 161 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break; 162 } 163 164 if (height <= h_max / 2) 165 geo.oformat |= METEOR_GEO_EVEN_ONLY; 166 167 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) { 168 av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno)); 169 return -1; 170 } 171 172 if (ioctl(*video_fd, BT848SFMT, &c) < 0) { 173 av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno)); 174 return -1; 175 } 176 177 c = bktr_dev[idev]; 178 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) { 179 av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno)); 180 return -1; 181 } 182 183 video_buf_size = width * height * 12 / 8; 184 185 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size, 186 PROT_READ, MAP_SHARED, *video_fd, (off_t)0); 187 if (video_buf == MAP_FAILED) { 188 av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno)); 189 return -1; 190 } 191 192 if (frequency != 0.0) { 193 ioctl_frequency = (unsigned long)(frequency*16); 194 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0) 195 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno)); 196 } 197 198 c = AUDIO_UNMUTE; 199 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0) 200 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno)); 201 202 c = METEOR_CAP_CONTINOUS; 203 ioctl(*video_fd, METEORCAPTUR, &c); 204 205 c = SIGUSR1; 206 ioctl(*video_fd, METEORSSIGNAL, &c); 207 208 return 0; 209} 210 211static void bktr_getframe(uint64_t per_frame) 212{ 213 uint64_t curtime; 214 215 curtime = av_gettime(); 216 if (!last_frame_time 217 || ((last_frame_time + per_frame) > curtime)) { 218 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) { 219 if (!nsignals) 220 av_log(NULL, AV_LOG_INFO, 221 "SLEPT NO signals - %d microseconds late\n", 222 (int)(av_gettime() - last_frame_time - per_frame)); 223 } 224 } 225 nsignals = 0; 226 last_frame_time = curtime; 227} 228 229 230/* note: we support only one picture read at a time */ 231static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt) 232{ 233 VideoData *s = s1->priv_data; 234 235 if (av_new_packet(pkt, video_buf_size) < 0) 236 return AVERROR(EIO); 237 238 bktr_getframe(s->per_frame); 239 240 pkt->pts = av_gettime(); 241 memcpy(pkt->data, video_buf, video_buf_size); 242 243 return video_buf_size; 244} 245 246static int grab_read_header(AVFormatContext *s1) 247{ 248 VideoData *s = s1->priv_data; 249 AVStream *st; 250 AVRational framerate; 251 int ret = 0; 252 253 if (!s->framerate) 254 switch (s->standard) { 255 case PAL: s->framerate = av_strdup("pal"); break; 256 case NTSC: s->framerate = av_strdup("ntsc"); break; 257 case SECAM: s->framerate = av_strdup("25"); break; 258 default: 259 av_log(s1, AV_LOG_ERROR, "Unknown standard.\n"); 260 ret = AVERROR(EINVAL); 261 goto out; 262 } 263 if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) { 264 av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate); 265 goto out; 266 } 267 268 st = avformat_new_stream(s1, NULL); 269 if (!st) { 270 ret = AVERROR(ENOMEM); 271 goto out; 272 } 273 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */ 274 275 s->per_frame = ((uint64_t)1000000 * framerate.den) / framerate.num; 276 277 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 278 st->codec->pix_fmt = AV_PIX_FMT_YUV420P; 279 st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; 280 st->codec->width = s->width; 281 st->codec->height = s->height; 282 st->codec->time_base.den = framerate.num; 283 st->codec->time_base.num = framerate.den; 284 285 286 if (bktr_init(s1->filename, s->width, s->height, s->standard, 287 &s->video_fd, &s->tuner_fd, -1, 0.0) < 0) { 288 ret = AVERROR(EIO); 289 goto out; 290 } 291 292 nsignals = 0; 293 last_frame_time = 0; 294 295out: 296 return ret; 297} 298 299static int grab_read_close(AVFormatContext *s1) 300{ 301 VideoData *s = s1->priv_data; 302 int c; 303 304 c = METEOR_CAP_STOP_CONT; 305 ioctl(s->video_fd, METEORCAPTUR, &c); 306 close(s->video_fd); 307 308 c = AUDIO_MUTE; 309 ioctl(s->tuner_fd, BT848_SAUDIO, &c); 310 close(s->tuner_fd); 311 312 munmap((caddr_t)video_buf, video_buf_size); 313 314 return 0; 315} 316 317#define OFFSET(x) offsetof(VideoData, x) 318#define DEC AV_OPT_FLAG_DECODING_PARAM 319static const AVOption options[] = { 320 { "standard", "", offsetof(VideoData, standard), AV_OPT_TYPE_INT, {.i64 = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 321 { "PAL", "", 0, AV_OPT_TYPE_CONST, {.i64 = PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 322 { "NTSC", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 323 { "SECAM", "", 0, AV_OPT_TYPE_CONST, {.i64 = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 324 { "PALN", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALN}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 325 { "PALM", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 326 { "NTSCJ", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 327 { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC }, 328 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, 329 { NULL }, 330}; 331 332static const AVClass bktr_class = { 333 .class_name = "BKTR grab interface", 334 .item_name = av_default_item_name, 335 .option = options, 336 .version = LIBAVUTIL_VERSION_INT, 337 .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT, 338}; 339 340AVInputFormat ff_bktr_demuxer = { 341 .name = "bktr", 342 .long_name = NULL_IF_CONFIG_SMALL("video grab"), 343 .priv_data_size = sizeof(VideoData), 344 .read_header = grab_read_header, 345 .read_packet = grab_read_packet, 346 .read_close = grab_read_close, 347 .flags = AVFMT_NOFILE, 348 .priv_class = &bktr_class, 349}; 350