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#define _BSD_SOURCE 1 28#define _NETBSD_SOURCE 29 30#include "libavformat/avformat.h" 31#if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H 32# include <dev/bktr/ioctl_meteor.h> 33# include <dev/bktr/ioctl_bt848.h> 34#elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H 35# include <machine/ioctl_meteor.h> 36# include <machine/ioctl_bt848.h> 37#elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H 38# include <dev/video/meteor/ioctl_meteor.h> 39# include <dev/video/bktr/ioctl_bt848.h> 40#elif HAVE_DEV_IC_BT8XX_H 41# include <dev/ic/bt8xx.h> 42#endif 43#include <unistd.h> 44#include <fcntl.h> 45#include <sys/ioctl.h> 46#include <sys/mman.h> 47#include <sys/time.h> 48#include <signal.h> 49#include <stdint.h> 50#include <strings.h> 51 52typedef struct { 53 int video_fd; 54 int tuner_fd; 55 int width, height; 56 int frame_rate; 57 int frame_rate_base; 58 uint64_t per_frame; 59} VideoData; 60 61 62#define PAL 1 63#define PALBDGHI 1 64#define NTSC 2 65#define NTSCM 2 66#define SECAM 3 67#define PALN 4 68#define PALM 5 69#define NTSCJ 6 70 71/* PAL is 768 x 576. NTSC is 640 x 480 */ 72#define PAL_HEIGHT 576 73#define SECAM_HEIGHT 576 74#define NTSC_HEIGHT 480 75 76#ifndef VIDEO_FORMAT 77#define VIDEO_FORMAT NTSC 78#endif 79 80static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2, 81 METEOR_DEV3, METEOR_DEV_SVIDEO }; 82 83uint8_t *video_buf; 84size_t video_buf_size; 85uint64_t last_frame_time; 86volatile sig_atomic_t nsignals; 87 88 89static void catchsignal(int signal) 90{ 91 nsignals++; 92 return; 93} 94 95static av_cold int bktr_init(const char *video_device, int width, int height, 96 int format, int *video_fd, int *tuner_fd, int idev, double frequency) 97{ 98 struct meteor_geomet geo; 99 int h_max; 100 long ioctl_frequency; 101 char *arg; 102 int c; 103 struct sigaction act, old; 104 105 if (idev < 0 || idev > 4) 106 { 107 arg = getenv ("BKTR_DEV"); 108 if (arg) 109 idev = atoi (arg); 110 if (idev < 0 || idev > 4) 111 idev = 1; 112 } 113 114 if (format < 1 || format > 6) 115 { 116 arg = getenv ("BKTR_FORMAT"); 117 if (arg) 118 format = atoi (arg); 119 if (format < 1 || format > 6) 120 format = VIDEO_FORMAT; 121 } 122 123 if (frequency <= 0) 124 { 125 arg = getenv ("BKTR_FREQUENCY"); 126 if (arg) 127 frequency = atof (arg); 128 if (frequency <= 0) 129 frequency = 0.0; 130 } 131 132 memset(&act, 0, sizeof(act)); 133 sigemptyset(&act.sa_mask); 134 act.sa_handler = catchsignal; 135 sigaction(SIGUSR1, &act, &old); 136 137 *tuner_fd = open("/dev/tuner0", O_RDONLY); 138 if (*tuner_fd < 0) 139 av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno)); 140 141 *video_fd = open(video_device, O_RDONLY); 142 if (*video_fd < 0) { 143 av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno)); 144 return -1; 145 } 146 147 geo.rows = height; 148 geo.columns = width; 149 geo.frames = 1; 150 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12; 151 152 switch (format) { 153 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break; 154 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break; 155 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break; 156 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break; 157 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break; 158 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break; 159 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break; 160 } 161 162 if (height <= h_max / 2) 163 geo.oformat |= METEOR_GEO_EVEN_ONLY; 164 165 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) { 166 av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno)); 167 return -1; 168 } 169 170 if (ioctl(*video_fd, BT848SFMT, &c) < 0) { 171 av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno)); 172 return -1; 173 } 174 175 c = bktr_dev[idev]; 176 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) { 177 av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno)); 178 return -1; 179 } 180 181 video_buf_size = width * height * 12 / 8; 182 183 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size, 184 PROT_READ, MAP_SHARED, *video_fd, (off_t)0); 185 if (video_buf == MAP_FAILED) { 186 av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno)); 187 return -1; 188 } 189 190 if (frequency != 0.0) { 191 ioctl_frequency = (unsigned long)(frequency*16); 192 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0) 193 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno)); 194 } 195 196 c = AUDIO_UNMUTE; 197 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0) 198 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno)); 199 200 c = METEOR_CAP_CONTINOUS; 201 ioctl(*video_fd, METEORCAPTUR, &c); 202 203 c = SIGUSR1; 204 ioctl(*video_fd, METEORSSIGNAL, &c); 205 206 return 0; 207} 208 209static void bktr_getframe(uint64_t per_frame) 210{ 211 uint64_t curtime; 212 213 curtime = av_gettime(); 214 if (!last_frame_time 215 || ((last_frame_time + per_frame) > curtime)) { 216 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) { 217 if (!nsignals) 218 av_log(NULL, AV_LOG_INFO, 219 "SLEPT NO signals - %d microseconds late\n", 220 (int)(av_gettime() - last_frame_time - per_frame)); 221 } 222 } 223 nsignals = 0; 224 last_frame_time = curtime; 225} 226 227 228/* note: we support only one picture read at a time */ 229static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt) 230{ 231 VideoData *s = s1->priv_data; 232 233 if (av_new_packet(pkt, video_buf_size) < 0) 234 return AVERROR(EIO); 235 236 bktr_getframe(s->per_frame); 237 238 pkt->pts = av_gettime(); 239 memcpy(pkt->data, video_buf, video_buf_size); 240 241 return video_buf_size; 242} 243 244static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) 245{ 246 VideoData *s = s1->priv_data; 247 AVStream *st; 248 int width, height; 249 int frame_rate; 250 int frame_rate_base; 251 int format = -1; 252 253 if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) 254 return -1; 255 256 width = ap->width; 257 height = ap->height; 258 frame_rate = ap->time_base.den; 259 frame_rate_base = ap->time_base.num; 260 261 st = av_new_stream(s1, 0); 262 if (!st) 263 return AVERROR(ENOMEM); 264 av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */ 265 266 s->width = width; 267 s->height = height; 268 s->frame_rate = frame_rate; 269 s->frame_rate_base = frame_rate_base; 270 s->per_frame = ((uint64_t)1000000 * s->frame_rate_base) / s->frame_rate; 271 272 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 273 st->codec->pix_fmt = PIX_FMT_YUV420P; 274 st->codec->codec_id = CODEC_ID_RAWVIDEO; 275 st->codec->width = width; 276 st->codec->height = height; 277 st->codec->time_base.den = frame_rate; 278 st->codec->time_base.num = frame_rate_base; 279 280 if (ap->standard) { 281 if (!strcasecmp(ap->standard, "pal")) 282 format = PAL; 283 else if (!strcasecmp(ap->standard, "secam")) 284 format = SECAM; 285 else if (!strcasecmp(ap->standard, "ntsc")) 286 format = NTSC; 287 } 288 289 if (bktr_init(s1->filename, width, height, format, 290 &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0) 291 return AVERROR(EIO); 292 293 nsignals = 0; 294 last_frame_time = 0; 295 296 return 0; 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 317AVInputFormat bktr_demuxer = { 318 "bktr", 319 NULL_IF_CONFIG_SMALL("video grab"), 320 sizeof(VideoData), 321 NULL, 322 grab_read_header, 323 grab_read_packet, 324 grab_read_close, 325 .flags = AVFMT_NOFILE, 326}; 327