| 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 | |
| 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 | |
| 54 | typedef struct VideoData { |
| 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 | |
| 83 | static const int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2, |
| 84 | METEOR_DEV3, METEOR_DEV_SVIDEO }; |
| 85 | |
| 86 | uint8_t *video_buf; |
| 87 | size_t video_buf_size; |
| 88 | uint64_t last_frame_time; |
| 89 | volatile sig_atomic_t nsignals; |
| 90 | |
| 91 | |
| 92 | static void catchsignal(int signal) |
| 93 | { |
| 94 | nsignals++; |
| 95 | return; |
| 96 | } |
| 97 | |
| 98 | static 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 | |
| 211 | static 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 */ |
| 231 | static 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 | |
| 246 | static 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 | |
| 295 | out: |
| 296 | return ret; |
| 297 | } |
| 298 | |
| 299 | static 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 |
| 319 | static 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 | |
| 332 | static 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 | |
| 340 | AVInputFormat 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 | }; |