Libav
|
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 FFmpeg. 00011 * 00012 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software 00024 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00025 */ 00026 00027 #define _BSD_SOURCE 1 00028 #define _NETBSD_SOURCE 00029 00030 #include "libavformat/avformat.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 int video_fd; 00054 int tuner_fd; 00055 int width, height; 00056 int frame_rate; 00057 int frame_rate_base; 00058 uint64_t per_frame; 00059 } VideoData; 00060 00061 00062 #define PAL 1 00063 #define PALBDGHI 1 00064 #define NTSC 2 00065 #define NTSCM 2 00066 #define SECAM 3 00067 #define PALN 4 00068 #define PALM 5 00069 #define NTSCJ 6 00070 00071 /* PAL is 768 x 576. NTSC is 640 x 480 */ 00072 #define PAL_HEIGHT 576 00073 #define SECAM_HEIGHT 576 00074 #define NTSC_HEIGHT 480 00075 00076 #ifndef VIDEO_FORMAT 00077 #define VIDEO_FORMAT NTSC 00078 #endif 00079 00080 static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2, 00081 METEOR_DEV3, METEOR_DEV_SVIDEO }; 00082 00083 uint8_t *video_buf; 00084 size_t video_buf_size; 00085 uint64_t last_frame_time; 00086 volatile sig_atomic_t nsignals; 00087 00088 00089 static void catchsignal(int signal) 00090 { 00091 nsignals++; 00092 return; 00093 } 00094 00095 static av_cold int bktr_init(const char *video_device, int width, int height, 00096 int format, int *video_fd, int *tuner_fd, int idev, double frequency) 00097 { 00098 struct meteor_geomet geo; 00099 int h_max; 00100 long ioctl_frequency; 00101 char *arg; 00102 int c; 00103 struct sigaction act, old; 00104 00105 if (idev < 0 || idev > 4) 00106 { 00107 arg = getenv ("BKTR_DEV"); 00108 if (arg) 00109 idev = atoi (arg); 00110 if (idev < 0 || idev > 4) 00111 idev = 1; 00112 } 00113 00114 if (format < 1 || format > 6) 00115 { 00116 arg = getenv ("BKTR_FORMAT"); 00117 if (arg) 00118 format = atoi (arg); 00119 if (format < 1 || format > 6) 00120 format = VIDEO_FORMAT; 00121 } 00122 00123 if (frequency <= 0) 00124 { 00125 arg = getenv ("BKTR_FREQUENCY"); 00126 if (arg) 00127 frequency = atof (arg); 00128 if (frequency <= 0) 00129 frequency = 0.0; 00130 } 00131 00132 memset(&act, 0, sizeof(act)); 00133 sigemptyset(&act.sa_mask); 00134 act.sa_handler = catchsignal; 00135 sigaction(SIGUSR1, &act, &old); 00136 00137 *tuner_fd = open("/dev/tuner0", O_RDONLY); 00138 if (*tuner_fd < 0) 00139 av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno)); 00140 00141 *video_fd = open(video_device, O_RDONLY); 00142 if (*video_fd < 0) { 00143 av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno)); 00144 return -1; 00145 } 00146 00147 geo.rows = height; 00148 geo.columns = width; 00149 geo.frames = 1; 00150 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12; 00151 00152 switch (format) { 00153 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break; 00154 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break; 00155 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break; 00156 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break; 00157 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break; 00158 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break; 00159 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break; 00160 } 00161 00162 if (height <= h_max / 2) 00163 geo.oformat |= METEOR_GEO_EVEN_ONLY; 00164 00165 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) { 00166 av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno)); 00167 return -1; 00168 } 00169 00170 if (ioctl(*video_fd, BT848SFMT, &c) < 0) { 00171 av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno)); 00172 return -1; 00173 } 00174 00175 c = bktr_dev[idev]; 00176 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) { 00177 av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno)); 00178 return -1; 00179 } 00180 00181 video_buf_size = width * height * 12 / 8; 00182 00183 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size, 00184 PROT_READ, MAP_SHARED, *video_fd, (off_t)0); 00185 if (video_buf == MAP_FAILED) { 00186 av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno)); 00187 return -1; 00188 } 00189 00190 if (frequency != 0.0) { 00191 ioctl_frequency = (unsigned long)(frequency*16); 00192 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0) 00193 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno)); 00194 } 00195 00196 c = AUDIO_UNMUTE; 00197 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0) 00198 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno)); 00199 00200 c = METEOR_CAP_CONTINOUS; 00201 ioctl(*video_fd, METEORCAPTUR, &c); 00202 00203 c = SIGUSR1; 00204 ioctl(*video_fd, METEORSSIGNAL, &c); 00205 00206 return 0; 00207 } 00208 00209 static void bktr_getframe(uint64_t per_frame) 00210 { 00211 uint64_t curtime; 00212 00213 curtime = av_gettime(); 00214 if (!last_frame_time 00215 || ((last_frame_time + per_frame) > curtime)) { 00216 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) { 00217 if (!nsignals) 00218 av_log(NULL, AV_LOG_INFO, 00219 "SLEPT NO signals - %d microseconds late\n", 00220 (int)(av_gettime() - last_frame_time - per_frame)); 00221 } 00222 } 00223 nsignals = 0; 00224 last_frame_time = curtime; 00225 } 00226 00227 00228 /* note: we support only one picture read at a time */ 00229 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt) 00230 { 00231 VideoData *s = s1->priv_data; 00232 00233 if (av_new_packet(pkt, video_buf_size) < 0) 00234 return AVERROR(EIO); 00235 00236 bktr_getframe(s->per_frame); 00237 00238 pkt->pts = av_gettime(); 00239 memcpy(pkt->data, video_buf, video_buf_size); 00240 00241 return video_buf_size; 00242 } 00243 00244 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) 00245 { 00246 VideoData *s = s1->priv_data; 00247 AVStream *st; 00248 int width, height; 00249 int frame_rate; 00250 int frame_rate_base; 00251 int format = -1; 00252 00253 if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0) 00254 return -1; 00255 00256 width = ap->width; 00257 height = ap->height; 00258 frame_rate = ap->time_base.den; 00259 frame_rate_base = ap->time_base.num; 00260 00261 st = av_new_stream(s1, 0); 00262 if (!st) 00263 return AVERROR(ENOMEM); 00264 av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */ 00265 00266 s->width = width; 00267 s->height = height; 00268 s->frame_rate = frame_rate; 00269 s->frame_rate_base = frame_rate_base; 00270 s->per_frame = ((uint64_t)1000000 * s->frame_rate_base) / s->frame_rate; 00271 00272 st->codec->codec_type = AVMEDIA_TYPE_VIDEO; 00273 st->codec->pix_fmt = PIX_FMT_YUV420P; 00274 st->codec->codec_id = CODEC_ID_RAWVIDEO; 00275 st->codec->width = width; 00276 st->codec->height = height; 00277 st->codec->time_base.den = frame_rate; 00278 st->codec->time_base.num = frame_rate_base; 00279 00280 if (ap->standard) { 00281 if (!strcasecmp(ap->standard, "pal")) 00282 format = PAL; 00283 else if (!strcasecmp(ap->standard, "secam")) 00284 format = SECAM; 00285 else if (!strcasecmp(ap->standard, "ntsc")) 00286 format = NTSC; 00287 } 00288 00289 if (bktr_init(s1->filename, width, height, format, 00290 &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0) 00291 return AVERROR(EIO); 00292 00293 nsignals = 0; 00294 last_frame_time = 0; 00295 00296 return 0; 00297 } 00298 00299 static int grab_read_close(AVFormatContext *s1) 00300 { 00301 VideoData *s = s1->priv_data; 00302 int c; 00303 00304 c = METEOR_CAP_STOP_CONT; 00305 ioctl(s->video_fd, METEORCAPTUR, &c); 00306 close(s->video_fd); 00307 00308 c = AUDIO_MUTE; 00309 ioctl(s->tuner_fd, BT848_SAUDIO, &c); 00310 close(s->tuner_fd); 00311 00312 munmap((caddr_t)video_buf, video_buf_size); 00313 00314 return 0; 00315 } 00316 00317 AVInputFormat bktr_demuxer = { 00318 "bktr", 00319 NULL_IF_CONFIG_SMALL("video grab"), 00320 sizeof(VideoData), 00321 NULL, 00322 grab_read_header, 00323 grab_read_packet, 00324 grab_read_close, 00325 .flags = AVFMT_NOFILE, 00326 };