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
28 #define _NETBSD_SOURCE
29 #define _XOPEN_SOURCE 600
31 #include "libavformat/avformat.h"
32 #if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
33 # include <dev/bktr/ioctl_meteor.h>
34 # include <dev/bktr/ioctl_bt848.h>
35 #elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
36 # include <machine/ioctl_meteor.h>
37 # include <machine/ioctl_bt848.h>
38 #elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
39 # include <dev/video/meteor/ioctl_meteor.h>
40 # include <dev/video/bktr/ioctl_bt848.h>
41 #elif HAVE_DEV_IC_BT8XX_H
42 # include <dev/ic/bt8xx.h>
46 #include <sys/ioctl.h>
72 /* PAL is 768 x 576. NTSC is 640 x 480 */
73 #define PAL_HEIGHT 576
74 #define SECAM_HEIGHT 576
75 #define NTSC_HEIGHT 480
78 #define VIDEO_FORMAT NTSC
81 static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
82 METEOR_DEV3, METEOR_DEV_SVIDEO };
85 size_t video_buf_size;
86 uint64_t last_frame_time;
87 volatile sig_atomic_t nsignals;
90 static void catchsignal(int signal)
96 static av_cold int bktr_init(const char *video_device, int width, int height,
97 int format, int *video_fd, int *tuner_fd, int idev, double frequency)
99 struct meteor_geomet geo;
101 long ioctl_frequency;
104 struct sigaction act, old;
106 if (idev < 0 || idev > 4)
108 arg = getenv ("BKTR_DEV");
111 if (idev < 0 || idev > 4)
115 if (format < 1 || format > 6)
117 arg = getenv ("BKTR_FORMAT");
120 if (format < 1 || format > 6)
121 format = VIDEO_FORMAT;
126 arg = getenv ("BKTR_FREQUENCY");
128 frequency = atof (arg);
133 memset(&act, 0, sizeof(act));
134 sigemptyset(&act.sa_mask);
135 act.sa_handler = catchsignal;
136 sigaction(SIGUSR1, &act, &old);
138 *tuner_fd = open("/dev/tuner0", O_RDONLY);
140 av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
142 *video_fd = open(video_device, O_RDONLY);
144 av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno));
151 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
154 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
155 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
156 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
157 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
158 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
159 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
160 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
163 if (height <= h_max / 2)
164 geo.oformat |= METEOR_GEO_EVEN_ONLY;
166 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
167 av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno));
171 if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
172 av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno));
177 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
178 av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno));
182 video_buf_size = width * height * 12 / 8;
184 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
185 PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
186 if (video_buf == MAP_FAILED) {
187 av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
191 if (frequency != 0.0) {
192 ioctl_frequency = (unsigned long)(frequency*16);
193 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
194 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
198 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
199 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
201 c = METEOR_CAP_CONTINOUS;
202 ioctl(*video_fd, METEORCAPTUR, &c);
205 ioctl(*video_fd, METEORSSIGNAL, &c);
210 static void bktr_getframe(uint64_t per_frame)
214 curtime = av_gettime();
216 || ((last_frame_time + per_frame) > curtime)) {
217 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
219 av_log(NULL, AV_LOG_INFO,
220 "SLEPT NO signals - %d microseconds late\n",
221 (int)(av_gettime() - last_frame_time - per_frame));
225 last_frame_time = curtime;
229 /* note: we support only one picture read at a time */
230 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
232 VideoData *s = s1->priv_data;
234 if (av_new_packet(pkt, video_buf_size) < 0)
237 bktr_getframe(s->per_frame);
239 pkt->pts = av_gettime();
240 memcpy(pkt->data, video_buf, video_buf_size);
242 return video_buf_size;
245 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
247 VideoData *s = s1->priv_data;
254 if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0)
259 frame_rate = ap->time_base.den;
260 frame_rate_base = ap->time_base.num;
262 st = av_new_stream(s1, 0);
264 return AVERROR(ENOMEM);
265 av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
269 s->frame_rate = frame_rate;
270 s->frame_rate_base = frame_rate_base;
271 s->per_frame = ((uint64_t)1000000 * s->frame_rate_base) / s->frame_rate;
273 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
274 st->codec->pix_fmt = PIX_FMT_YUV420P;
275 st->codec->codec_id = CODEC_ID_RAWVIDEO;
276 st->codec->width = width;
277 st->codec->height = height;
278 st->codec->time_base.den = frame_rate;
279 st->codec->time_base.num = frame_rate_base;
282 if (!strcasecmp(ap->standard, "pal"))
284 else if (!strcasecmp(ap->standard, "secam"))
286 else if (!strcasecmp(ap->standard, "ntsc"))
290 if (bktr_init(s1->filename, width, height, format,
291 &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0)
300 static int grab_read_close(AVFormatContext *s1)
302 VideoData *s = s1->priv_data;
305 c = METEOR_CAP_STOP_CONT;
306 ioctl(s->video_fd, METEORCAPTUR, &c);
310 ioctl(s->tuner_fd, BT848_SAUDIO, &c);
313 munmap((caddr_t)video_buf, video_buf_size);
318 AVInputFormat ff_bktr_demuxer = {
320 NULL_IF_CONFIG_SMALL("video grab"),
326 .flags = AVFMT_NOFILE,