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 #include "libavutil/log.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/parseutils.h"
30 #if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
31 # include <dev/bktr/ioctl_meteor.h>
32 # include <dev/bktr/ioctl_bt848.h>
33 #elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
34 # include <machine/ioctl_meteor.h>
35 # include <machine/ioctl_bt848.h>
36 #elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
37 # include <dev/video/meteor/ioctl_meteor.h>
38 # include <dev/video/bktr/ioctl_bt848.h>
39 #elif HAVE_DEV_IC_BT8XX_H
40 # include <dev/ic/bt8xx.h>
44 #include <sys/ioctl.h>
61 char *video_size; /**< String describing video size, set by a private option. */
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
80 #define VIDEO_FORMAT NTSC
83 static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
84 METEOR_DEV3, METEOR_DEV_SVIDEO };
87 size_t video_buf_size;
88 uint64_t last_frame_time;
89 volatile sig_atomic_t nsignals;
92 static void catchsignal(int signal)
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)
101 struct meteor_geomet geo;
103 long ioctl_frequency;
106 struct sigaction act, old;
108 if (idev < 0 || idev > 4)
110 arg = getenv ("BKTR_DEV");
113 if (idev < 0 || idev > 4)
117 if (format < 1 || format > 6)
119 arg = getenv ("BKTR_FORMAT");
122 if (format < 1 || format > 6)
123 format = VIDEO_FORMAT;
128 arg = getenv ("BKTR_FREQUENCY");
130 frequency = atof (arg);
135 memset(&act, 0, sizeof(act));
136 sigemptyset(&act.sa_mask);
137 act.sa_handler = catchsignal;
138 sigaction(SIGUSR1, &act, &old);
140 *tuner_fd = open("/dev/tuner0", O_RDONLY);
142 av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
144 *video_fd = open(video_device, O_RDONLY);
146 av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno));
153 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
156 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
157 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
158 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
159 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
160 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
161 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
162 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
165 if (height <= h_max / 2)
166 geo.oformat |= METEOR_GEO_EVEN_ONLY;
168 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
169 av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno));
173 if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
174 av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno));
179 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
180 av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno));
184 video_buf_size = width * height * 12 / 8;
186 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
187 PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
188 if (video_buf == MAP_FAILED) {
189 av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
193 if (frequency != 0.0) {
194 ioctl_frequency = (unsigned long)(frequency*16);
195 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
196 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
200 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
201 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
203 c = METEOR_CAP_CONTINOUS;
204 ioctl(*video_fd, METEORCAPTUR, &c);
207 ioctl(*video_fd, METEORSSIGNAL, &c);
212 static void bktr_getframe(uint64_t per_frame)
216 curtime = av_gettime();
218 || ((last_frame_time + per_frame) > curtime)) {
219 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
221 av_log(NULL, AV_LOG_INFO,
222 "SLEPT NO signals - %d microseconds late\n",
223 (int)(av_gettime() - last_frame_time - per_frame));
227 last_frame_time = curtime;
231 /* note: we support only one picture read at a time */
232 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
234 VideoData *s = s1->priv_data;
236 if (av_new_packet(pkt, video_buf_size) < 0)
239 bktr_getframe(s->per_frame);
241 pkt->pts = av_gettime();
242 memcpy(pkt->data, video_buf, video_buf_size);
244 return video_buf_size;
247 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
249 VideoData *s = s1->priv_data;
256 if (ap->time_base.den <= 0) {
257 ret = AVERROR(EINVAL);
261 if ((ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
262 av_log(s1, AV_LOG_ERROR, "Couldn't parse video size.\n");
265 #if FF_API_FORMAT_PARAMETERS
271 frame_rate = ap->time_base.den;
272 frame_rate_base = ap->time_base.num;
274 st = av_new_stream(s1, 0);
276 ret = AVERROR(ENOMEM);
279 av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
283 s->frame_rate = frame_rate;
284 s->frame_rate_base = frame_rate_base;
285 s->per_frame = ((uint64_t)1000000 * s->frame_rate_base) / s->frame_rate;
287 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
288 st->codec->pix_fmt = PIX_FMT_YUV420P;
289 st->codec->codec_id = CODEC_ID_RAWVIDEO;
290 st->codec->width = width;
291 st->codec->height = height;
292 st->codec->time_base.den = frame_rate;
293 st->codec->time_base.num = frame_rate_base;
295 #if FF_API_FORMAT_PARAMETERS
297 if (!strcasecmp(ap->standard, "pal"))
299 else if (!strcasecmp(ap->standard, "secam"))
301 else if (!strcasecmp(ap->standard, "ntsc"))
306 if (bktr_init(s1->filename, width, height, s->standard,
307 &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0) {
316 av_freep(&s->video_size);
320 static int grab_read_close(AVFormatContext *s1)
322 VideoData *s = s1->priv_data;
325 c = METEOR_CAP_STOP_CONT;
326 ioctl(s->video_fd, METEORCAPTUR, &c);
330 ioctl(s->tuner_fd, BT848_SAUDIO, &c);
333 munmap((caddr_t)video_buf, video_buf_size);
338 #define OFFSET(x) offsetof(VideoData, x)
339 #define DEC AV_OPT_FLAG_DECODING_PARAM
340 static const AVOption options[] = {
341 { "standard", "", offsetof(VideoData, standard), FF_OPT_TYPE_INT, {.dbl = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
342 { "PAL", "", 0, FF_OPT_TYPE_CONST, {.dbl = PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
343 { "NTSC", "", 0, FF_OPT_TYPE_CONST, {.dbl = NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
344 { "SECAM", "", 0, FF_OPT_TYPE_CONST, {.dbl = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
345 { "PALN", "", 0, FF_OPT_TYPE_CONST, {.dbl = PALN}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
346 { "PALM", "", 0, FF_OPT_TYPE_CONST, {.dbl = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
347 { "NTSCJ", "", 0, FF_OPT_TYPE_CONST, {.dbl = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
348 { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC },
352 static const AVClass bktr_class = {
353 .class_name = "BKTR grab interface",
354 .item_name = av_default_item_name,
356 .version = LIBAVUTIL_VERSION_INT,
359 AVInputFormat ff_bktr_demuxer = {
361 NULL_IF_CONFIG_SMALL("video grab"),
367 .flags = AVFMT_NOFILE,
368 .priv_class = &bktr_class,