2 * *BSD video grab interface
3 * Copyright (c) 2002 Steve O'Hara-Smith
5 * Linux video grab interface
6 * Copyright (c) 2000,2001 Gerard Lantau.
8 * simple_grab.c Copyright (c) 1999 Roger Hardiman
10 * This file is part of FFmpeg.
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.
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.
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
27 #if defined(__FreeBSD__)
28 # if __FreeBSD__ >= 502100
29 # include <dev/bktr/ioctl_meteor.h>
30 # include <dev/bktr/ioctl_bt848.h>
32 # include <machine/ioctl_meteor.h>
33 # include <machine/ioctl_bt848.h>
35 #elif defined(__FreeBSD_kernel__)
36 # include <dev/bktr/ioctl_meteor.h>
37 # include <dev/bktr/ioctl_bt848.h>
38 #elif defined(__DragonFly__)
39 # include <dev/video/meteor/ioctl_meteor.h>
40 # include <dev/video/bktr/ioctl_bt848.h>
42 # include <dev/ic/bt8xx.h>
46 #include <sys/ioctl.h>
70 /* PAL is 768 x 576. NTSC is 640 x 480 */
71 #define PAL_HEIGHT 576
72 #define SECAM_HEIGHT 576
73 #define NTSC_HEIGHT 480
76 #define VIDEO_FORMAT NTSC
79 static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
80 METEOR_DEV3, METEOR_DEV_SVIDEO };
83 size_t video_buf_size;
84 u_int64_t last_frame_time;
85 volatile sig_atomic_t nsignals;
88 static void catchsignal(int signal)
94 static int bktr_init(const char *video_device, int width, int height,
95 int format, int *video_fd, int *tuner_fd, int idev, double frequency)
97 struct meteor_geomet geo;
102 struct sigaction act, old;
104 if (idev < 0 || idev > 4)
106 arg = getenv ("BKTR_DEV");
109 if (idev < 0 || idev > 4)
113 if (format < 1 || format > 6)
115 arg = getenv ("BKTR_FORMAT");
118 if (format < 1 || format > 6)
119 format = VIDEO_FORMAT;
124 arg = getenv ("BKTR_FREQUENCY");
126 frequency = atof (arg);
131 memset(&act, 0, sizeof(act));
132 sigemptyset(&act.sa_mask);
133 act.sa_handler = catchsignal;
134 sigaction(SIGUSR1, &act, &old);
136 *tuner_fd = open("/dev/tuner0", O_RDONLY);
138 perror("Warning: Tuner not opened, continuing");
140 *video_fd = open(video_device, O_RDONLY);
142 perror(video_device);
149 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
152 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
153 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
154 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
155 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
156 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
157 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
158 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
161 if (height <= h_max / 2)
162 geo.oformat |= METEOR_GEO_EVEN_ONLY;
164 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
165 perror("METEORSETGEO");
169 if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
175 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
176 perror("METEORSINPUT");
180 video_buf_size = width * height * 12 / 8;
182 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
183 PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
184 if (video_buf == MAP_FAILED) {
189 if (frequency != 0.0) {
190 ioctl_frequency = (unsigned long)(frequency*16);
191 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
192 perror("TVTUNER_SETFREQ");
196 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
197 perror("TVTUNER_SAUDIO");
199 c = METEOR_CAP_CONTINOUS;
200 ioctl(*video_fd, METEORCAPTUR, &c);
203 ioctl(*video_fd, METEORSSIGNAL, &c);
208 static void bktr_getframe(u_int64_t per_frame)
212 curtime = av_gettime();
214 || ((last_frame_time + per_frame) > curtime)) {
215 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
217 av_log(NULL, AV_LOG_INFO,
218 "SLEPT NO signals - %d microseconds late\n",
219 (int)(av_gettime() - last_frame_time - per_frame));
223 last_frame_time = curtime;
227 /* note: we support only one picture read at a time */
228 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
230 VideoData *s = s1->priv_data;
232 if (av_new_packet(pkt, video_buf_size) < 0)
235 bktr_getframe(s->per_frame);
237 pkt->pts = av_gettime();
238 memcpy(pkt->data, video_buf, video_buf_size);
240 return video_buf_size;
243 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
245 VideoData *s = s1->priv_data;
251 const char *video_device;
253 if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0)
258 frame_rate = ap->time_base.den;
259 frame_rate_base = ap->time_base.num;
261 video_device = ap->device;
263 video_device = "/dev/bktr0";
265 st = av_new_stream(s1, 0);
268 av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
272 s->frame_rate = frame_rate;
273 s->frame_rate_base = frame_rate_base;
274 s->per_frame = ((u_int64_t)1000000 * s->frame_rate_base) / s->frame_rate;
276 st->codec->codec_type = CODEC_TYPE_VIDEO;
277 st->codec->pix_fmt = PIX_FMT_YUV420P;
278 st->codec->codec_id = CODEC_ID_RAWVIDEO;
279 st->codec->width = width;
280 st->codec->height = height;
281 st->codec->time_base.den = frame_rate;
282 st->codec->time_base.num = frame_rate_base;
285 if (!strcasecmp(ap->standard, "pal"))
287 else if (!strcasecmp(ap->standard, "secam"))
289 else if (!strcasecmp(ap->standard, "ntsc"))
293 if (bktr_init(video_device, width, height, format,
294 &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0)
303 static int grab_read_close(AVFormatContext *s1)
305 VideoData *s = s1->priv_data;
308 c = METEOR_CAP_STOP_CONT;
309 ioctl(s->video_fd, METEORCAPTUR, &c);
313 ioctl(s->tuner_fd, BT848_SAUDIO, &c);
316 munmap((caddr_t)video_buf, video_buf_size);
321 AVInputFormat video_grab_device_demuxer = {
329 .flags = AVFMT_NOFILE,