Libav 0.7.1
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00001 /* 00002 * *BSD video grab interface 00003 * Copyright (c) 2002 Steve O'Hara-Smith 00004 * based on 00005 * Linux video grab interface 00006 * Copyright (c) 2000,2001 Gerard Lantau 00007 * and 00008 * simple_grab.c Copyright (c) 1999 Roger Hardiman 00009 * 00010 * This file is part of Libav. 00011 * 00012 * Libav is free software; you can redistribute it and/or 00013 * modify it under the terms of the GNU Lesser General Public 00014 * License as published by the Free Software Foundation; either 00015 * version 2.1 of the License, or (at your option) any later version. 00016 * 00017 * Libav is distributed in the hope that it will be useful, 00018 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00019 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00020 * Lesser General Public License for more details. 00021 * 00022 * You should have received a copy of the GNU Lesser General Public 00023 * License along with Libav; if not, write to the Free Software 00024 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00025 */ 00026 00027 #include "libavformat/avformat.h" 00028 #include "libavutil/log.h" 00029 #include "libavutil/opt.h" 00030 #include "libavutil/parseutils.h" 00031 #if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H 00032 # include <dev/bktr/ioctl_meteor.h> 00033 # include <dev/bktr/ioctl_bt848.h> 00034 #elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H 00035 # include <machine/ioctl_meteor.h> 00036 # include <machine/ioctl_bt848.h> 00037 #elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H 00038 # include <dev/video/meteor/ioctl_meteor.h> 00039 # include <dev/video/bktr/ioctl_bt848.h> 00040 #elif HAVE_DEV_IC_BT8XX_H 00041 # include <dev/ic/bt8xx.h> 00042 #endif 00043 #include <unistd.h> 00044 #include <fcntl.h> 00045 #include <sys/ioctl.h> 00046 #include <sys/mman.h> 00047 #include <sys/time.h> 00048 #include <signal.h> 00049 #include <stdint.h> 00050 #include <strings.h> 00051 00052 typedef struct { 00053 AVClass *class; 00054 int video_fd; 00055 int tuner_fd; 00056 int width, height; 00057 uint64_t per_frame; 00058 int standard; 00059 char *video_size; 00060 char *framerate; 00061 } VideoData; 00062 00063 00064 #define PAL 1 00065 #define PALBDGHI 1 00066 #define NTSC 2 00067 #define NTSCM 2 00068 #define SECAM 3 00069 #define PALN 4 00070 #define PALM 5 00071 #define NTSCJ 6 00072 00073 /* PAL is 768 x 576. NTSC is 640 x 480 */ 00074 #define PAL_HEIGHT 576 00075 #define SECAM_HEIGHT 576 00076 #define NTSC_HEIGHT 480 00077 00078 #ifndef VIDEO_FORMAT 00079 #define VIDEO_FORMAT NTSC 00080 #endif 00081 00082 static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2, 00083 METEOR_DEV3, METEOR_DEV_SVIDEO }; 00084 00085 uint8_t *video_buf; 00086 size_t video_buf_size; 00087 uint64_t last_frame_time; 00088 volatile sig_atomic_t nsignals; 00089 00090 00091 static void catchsignal(int signal) 00092 { 00093 nsignals++; 00094 return; 00095 } 00096 00097 static av_cold int bktr_init(const char *video_device, int width, int height, 00098 int format, int *video_fd, int *tuner_fd, int idev, double frequency) 00099 { 00100 struct meteor_geomet geo; 00101 int h_max; 00102 long ioctl_frequency; 00103 char *arg; 00104 int c; 00105 struct sigaction act, old; 00106 00107 if (idev < 0 || idev > 4) 00108 { 00109 arg = getenv ("BKTR_DEV"); 00110 if (arg) 00111 idev = atoi (arg); 00112 if (idev < 0 || idev > 4) 00113 idev = 1; 00114 } 00115 00116 if (format < 1 || format > 6) 00117 { 00118 arg = getenv ("BKTR_FORMAT"); 00119 if (arg) 00120 format = atoi (arg); 00121 if (format < 1 || format > 6) 00122 format = VIDEO_FORMAT; 00123 } 00124 00125 if (frequency <= 0) 00126 { 00127 arg = getenv ("BKTR_FREQUENCY"); 00128 if (arg) 00129 frequency = atof (arg); 00130 if (frequency <= 0) 00131 frequency = 0.0; 00132 } 00133 00134 memset(&act, 0, sizeof(act)); 00135 sigemptyset(&act.sa_mask); 00136 act.sa_handler = catchsignal; 00137 sigaction(SIGUSR1, &act, &old); 00138 00139 *tuner_fd = open("/dev/tuner0", O_RDONLY); 00140 if (*tuner_fd < 0) 00141 av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno)); 00142 00143 *video_fd = open(video_device, O_RDONLY); 00144 if (*video_fd < 0) { 00145 av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno)); 00146 return -1; 00147 } 00148 00149 geo.rows = height; 00150 geo.columns = width; 00151 geo.frames = 1; 00152 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12; 00153 00154 switch (format) { 00155 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break; 00156 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break; 00157 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break; 00158 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break; 00159 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break; 00160 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break; 00161 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break; 00162 } 00163 00164 if (height <= h_max / 2) 00165 geo.oformat |= METEOR_GEO_EVEN_ONLY; 00166 00167 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) { 00168 av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno)); 00169 return -1; 00170 } 00171 00172 if (ioctl(*video_fd, BT848SFMT, &c) < 0) { 00173 av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno)); 00174 return -1; 00175 } 00176 00177 c = bktr_dev[idev]; 00178 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) { 00179 av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno)); 00180 return -1; 00181 } 00182 00183 video_buf_size = width * height * 12 / 8; 00184 00185 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size, 00186 PROT_READ, MAP_SHARED, *video_fd, (off_t)0); 00187 if (video_buf == MAP_FAILED) { 00188 av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno)); 00189 return -1; 00190 } 00191 00192 if (frequency != 0.0) { 00193 ioctl_frequency = (unsigned long)(frequency*16); 00194 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0) 00195 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno)); 00196 } 00197 00198 c = AUDIO_UNMUTE; 00199 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0) 00200 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno)); 00201 00202 c = METEOR_CAP_CONTINOUS; 00203 ioctl(*video_fd, METEORCAPTUR, &c); 00204 00205 c = SIGUSR1; 00206 ioctl(*video_fd, METEORSSIGNAL, &c); 00207 00208 return 0; 00209 } 00210 00211 static void bktr_getframe(uint64_t per_frame) 00212 { 00213 uint64_t curtime; 00214 00215 curtime = av_gettime(); 00216 if (!last_frame_time 00217 || ((last_frame_time + per_frame) > curtime)) { 00218 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) { 00219 if (!nsignals) 00220 av_log(NULL, AV_LOG_INFO, 00221 "SLEPT NO signals - %d microseconds late\n", 00222 (int)(av_gettime() - last_frame_time - per_frame)); 00223 } 00224 } 00225 nsignals = 0; 00226 last_frame_time = curtime; 00227 } 00228 00229 00230 /* note: we support only one picture read at a time */ 00231 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt) 00232 { 00233 VideoData *s = s1->priv_data; 00234 00235 if (av_new_packet(pkt, video_buf_size) < 0) 00236 return AVERROR(EIO); 00237 00238 bktr_getframe(s->per_frame); 00239 00240 pkt->pts = av_gettime(); 00241 memcpy(pkt->data, video_buf, video_buf_size); 00242 00243 return video_buf_size; 00244 } 00245 00246 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) 00247 { 00248 VideoData *s = s1->priv_data; 00249 AVStream *st; 00250 int width, height; 00251 AVRational fps; 00252 int ret = 0; 00253 00254 #if FF_API_FORMAT_PARAMETERS 00255 if (ap->standard) { 00256 if (!strcasecmp(ap->standard, "pal")) 00257 s->standard = PAL; 00258 else if (!strcasecmp(ap->standard, "secam")) 00259 s->standard = SECAM; 00260 else if (!strcasecmp(ap->standard, "ntsc")) 00261 s->standard = NTSC; 00262 } 00263 #endif 00264 00265 if ((ret = av_parse_video_size(&width, &height, s->video_size)) < 0) { 00266 av_log(s1, AV_LOG_ERROR, "Couldn't parse video size.\n"); 00267 goto out; 00268 } 00269 00270 if (!s->framerate) 00271 switch (s->standard) { 00272 case PAL: s->framerate = av_strdup("pal"); break; 00273 case NTSC: s->framerate = av_strdup("ntsc"); break; 00274 case SECAM: s->framerate = av_strdup("25"); break; 00275 default: 00276 av_log(s1, AV_LOG_ERROR, "Unknown standard.\n"); 00277 ret = AVERROR(EINVAL); 00278 goto out; 00279 } 00280 if ((ret = av_parse_video_rate(&fps, s->framerate)) < 0) { 00281 av_log(s1, AV_LOG_ERROR, "Couldn't parse framerate.\n"); 00282 goto out; 00283 } 00284 #if FF_API_FORMAT_PARAMETERS 00285 if (ap->width > 0) 00286 width = ap->width; 00287 if (ap->height > 0) 00288 height = ap->height; 00289 if (ap->time_base.num) 00290 fps = (AVRational){ap->time_base.den, ap->time_base.num}; 00291 #endif 00292 00293 st = av_new_stream(s1, 0); 00294 if (!st) { 00295 ret = AVERROR(ENOMEM); 00296 goto out; 00297 } 00298 av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */ 00299 00300 s->width = width; 00301 s->height = height; 00302 s->per_frame = ((uint64_t)1000000 * fps.den) / fps.num; 00303 00304 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 00305 st->codec->pix_fmt = PIX_FMT_YUV420P; 00306 st->codec->codec_id = CODEC_ID_RAWVIDEO; 00307 st->codec->width = width; 00308 st->codec->height = height; 00309 st->codec->time_base.den = fps.num; 00310 st->codec->time_base.num = fps.den; 00311 00312 00313 if (bktr_init(s1->filename, width, height, s->standard, 00314 &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0) { 00315 ret = AVERROR(EIO); 00316 goto out; 00317 } 00318 00319 nsignals = 0; 00320 last_frame_time = 0; 00321 00322 out: 00323 return ret; 00324 } 00325 00326 static int grab_read_close(AVFormatContext *s1) 00327 { 00328 VideoData *s = s1->priv_data; 00329 int c; 00330 00331 c = METEOR_CAP_STOP_CONT; 00332 ioctl(s->video_fd, METEORCAPTUR, &c); 00333 close(s->video_fd); 00334 00335 c = AUDIO_MUTE; 00336 ioctl(s->tuner_fd, BT848_SAUDIO, &c); 00337 close(s->tuner_fd); 00338 00339 munmap((caddr_t)video_buf, video_buf_size); 00340 00341 return 0; 00342 } 00343 00344 #define OFFSET(x) offsetof(VideoData, x) 00345 #define DEC AV_OPT_FLAG_DECODING_PARAM 00346 static const AVOption options[] = { 00347 { "standard", "", offsetof(VideoData, standard), FF_OPT_TYPE_INT, {.dbl = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 00348 { "PAL", "", 0, FF_OPT_TYPE_CONST, {.dbl = PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 00349 { "NTSC", "", 0, FF_OPT_TYPE_CONST, {.dbl = NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 00350 { "SECAM", "", 0, FF_OPT_TYPE_CONST, {.dbl = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 00351 { "PALN", "", 0, FF_OPT_TYPE_CONST, {.dbl = PALN}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 00352 { "PALM", "", 0, FF_OPT_TYPE_CONST, {.dbl = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 00353 { "NTSCJ", "", 0, FF_OPT_TYPE_CONST, {.dbl = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" }, 00354 { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC }, 00355 { "framerate", "", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC }, 00356 { NULL }, 00357 }; 00358 00359 static const AVClass bktr_class = { 00360 .class_name = "BKTR grab interface", 00361 .item_name = av_default_item_name, 00362 .option = options, 00363 .version = LIBAVUTIL_VERSION_INT, 00364 }; 00365 00366 AVInputFormat ff_bktr_demuxer = { 00367 "bktr", 00368 NULL_IF_CONFIG_SMALL("video grab"), 00369 sizeof(VideoData), 00370 NULL, 00371 grab_read_header, 00372 grab_read_packet, 00373 grab_read_close, 00374 .flags = AVFMT_NOFILE, 00375 .priv_class = &bktr_class, 00376 };