summaryrefslogtreecommitdiff
path: root/libavdevice/bktr.c (plain)
blob: 418247dc4eb5ede08a1dc4b28c3c2539865ca5c0
1/*
2 * *BSD video grab interface
3 * Copyright (c) 2002 Steve O'Hara-Smith
4 * based on
5 * Linux video grab interface
6 * Copyright (c) 2000, 2001 Fabrice Bellard
7 * and
8 * simple_grab.c Copyright (c) 1999 Roger Hardiman
9 *
10 * This file is part of FFmpeg.
11 *
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.
16 *
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.
21 *
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
25 */
26
27#include "libavformat/internal.h"
28#include "libavutil/internal.h"
29#include "libavutil/log.h"
30#include "libavutil/opt.h"
31#include "libavutil/parseutils.h"
32#include "libavutil/time.h"
33#if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
34# include <dev/bktr/ioctl_meteor.h>
35# include <dev/bktr/ioctl_bt848.h>
36#elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
37# include <machine/ioctl_meteor.h>
38# include <machine/ioctl_bt848.h>
39#elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
40# include <dev/video/meteor/ioctl_meteor.h>
41# include <dev/video/bktr/ioctl_bt848.h>
42#elif HAVE_DEV_IC_BT8XX_H
43# include <dev/ic/bt8xx.h>
44#endif
45#include <unistd.h>
46#include <fcntl.h>
47#include <sys/ioctl.h>
48#include <sys/mman.h>
49#include <sys/time.h>
50#include <signal.h>
51#include <stdint.h>
52#include "avdevice.h"
53
54typedef struct VideoData {
55 AVClass *class;
56 int video_fd;
57 int tuner_fd;
58 int width, height;
59 uint64_t per_frame;
60 int standard;
61 char *framerate; /**< Set by a private option. */
62} VideoData;
63
64
65#define PAL 1
66#define PALBDGHI 1
67#define NTSC 2
68#define NTSCM 2
69#define SECAM 3
70#define PALN 4
71#define PALM 5
72#define NTSCJ 6
73
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
78
79#ifndef VIDEO_FORMAT
80#define VIDEO_FORMAT NTSC
81#endif
82
83static const int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
84 METEOR_DEV3, METEOR_DEV_SVIDEO };
85
86uint8_t *video_buf;
87size_t video_buf_size;
88uint64_t last_frame_time;
89volatile sig_atomic_t nsignals;
90
91
92static void catchsignal(int signal)
93{
94 nsignals++;
95 return;
96}
97
98static 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)
100{
101 struct meteor_geomet geo;
102 int h_max;
103 long ioctl_frequency;
104 char *arg;
105 int c;
106 struct sigaction act, old;
107 int ret;
108 char errbuf[128];
109
110 if (idev < 0 || idev > 4)
111 {
112 arg = getenv ("BKTR_DEV");
113 if (arg)
114 idev = atoi (arg);
115 if (idev < 0 || idev > 4)
116 idev = 1;
117 }
118
119 if (format < 1 || format > 6)
120 {
121 arg = getenv ("BKTR_FORMAT");
122 if (arg)
123 format = atoi (arg);
124 if (format < 1 || format > 6)
125 format = VIDEO_FORMAT;
126 }
127
128 if (frequency <= 0)
129 {
130 arg = getenv ("BKTR_FREQUENCY");
131 if (arg)
132 frequency = atof (arg);
133 if (frequency <= 0)
134 frequency = 0.0;
135 }
136
137 memset(&act, 0, sizeof(act));
138 sigemptyset(&act.sa_mask);
139 act.sa_handler = catchsignal;
140 sigaction(SIGUSR1, &act, &old);
141
142 *tuner_fd = avpriv_open("/dev/tuner0", O_RDONLY);
143 if (*tuner_fd < 0)
144 av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
145
146 *video_fd = avpriv_open(video_device, O_RDONLY);
147 if (*video_fd < 0) {
148 ret = AVERROR(errno);
149 av_strerror(ret, errbuf, sizeof(errbuf));
150 av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, errbuf);
151 return ret;
152 }
153
154 geo.rows = height;
155 geo.columns = width;
156 geo.frames = 1;
157 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
158
159 switch (format) {
160 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
161 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
162 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
163 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
164 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
165 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
166 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
167 }
168
169 if (height <= h_max / 2)
170 geo.oformat |= METEOR_GEO_EVEN_ONLY;
171
172 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
173 ret = AVERROR(errno);
174 av_strerror(ret, errbuf, sizeof(errbuf));
175 av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", errbuf);
176 return ret;
177 }
178
179 if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
180 ret = AVERROR(errno);
181 av_strerror(ret, errbuf, sizeof(errbuf));
182 av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", errbuf);
183 return ret;
184 }
185
186 c = bktr_dev[idev];
187 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
188 ret = AVERROR(errno);
189 av_strerror(ret, errbuf, sizeof(errbuf));
190 av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", errbuf);
191 return ret;
192 }
193
194 video_buf_size = width * height * 12 / 8;
195
196 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
197 PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
198 if (video_buf == MAP_FAILED) {
199 ret = AVERROR(errno);
200 av_strerror(ret, errbuf, sizeof(errbuf));
201 av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", errbuf);
202 return ret;
203 }
204
205 if (frequency != 0.0) {
206 ioctl_frequency = (unsigned long)(frequency*16);
207 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
208 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
209 }
210
211 c = AUDIO_UNMUTE;
212 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
213 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
214
215 c = METEOR_CAP_CONTINOUS;
216 ioctl(*video_fd, METEORCAPTUR, &c);
217
218 c = SIGUSR1;
219 ioctl(*video_fd, METEORSSIGNAL, &c);
220
221 return 0;
222}
223
224static void bktr_getframe(uint64_t per_frame)
225{
226 uint64_t curtime;
227
228 curtime = av_gettime();
229 if (!last_frame_time
230 || ((last_frame_time + per_frame) > curtime)) {
231 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
232 if (!nsignals)
233 av_log(NULL, AV_LOG_INFO,
234 "SLEPT NO signals - %d microseconds late\n",
235 (int)(av_gettime() - last_frame_time - per_frame));
236 }
237 }
238 nsignals = 0;
239 last_frame_time = curtime;
240}
241
242
243/* note: we support only one picture read at a time */
244static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
245{
246 VideoData *s = s1->priv_data;
247
248 if (av_new_packet(pkt, video_buf_size) < 0)
249 return AVERROR(EIO);
250
251 bktr_getframe(s->per_frame);
252
253 pkt->pts = av_gettime();
254 memcpy(pkt->data, video_buf, video_buf_size);
255
256 return video_buf_size;
257}
258
259static int grab_read_header(AVFormatContext *s1)
260{
261 VideoData *s = s1->priv_data;
262 AVStream *st;
263 AVRational framerate;
264 int ret = 0;
265
266 if (!s->framerate)
267 switch (s->standard) {
268 case PAL: s->framerate = av_strdup("pal"); break;
269 case NTSC: s->framerate = av_strdup("ntsc"); break;
270 case SECAM: s->framerate = av_strdup("25"); break;
271 default:
272 av_log(s1, AV_LOG_ERROR, "Unknown standard.\n");
273 ret = AVERROR(EINVAL);
274 goto out;
275 }
276 if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
277 av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate);
278 goto out;
279 }
280
281 st = avformat_new_stream(s1, NULL);
282 if (!st) {
283 ret = AVERROR(ENOMEM);
284 goto out;
285 }
286 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
287
288 s->per_frame = ((uint64_t)1000000 * framerate.den) / framerate.num;
289
290 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
291 st->codecpar->format = AV_PIX_FMT_YUV420P;
292 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
293 st->codecpar->width = s->width;
294 st->codecpar->height = s->height;
295 st->avg_frame_rate = framerate;
296
297 if (bktr_init(s1->filename, s->width, s->height, s->standard,
298 &s->video_fd, &s->tuner_fd, -1, 0.0) < 0) {
299 ret = AVERROR(EIO);
300 goto out;
301 }
302
303 nsignals = 0;
304 last_frame_time = 0;
305
306out:
307 return ret;
308}
309
310static int grab_read_close(AVFormatContext *s1)
311{
312 VideoData *s = s1->priv_data;
313 int c;
314
315 c = METEOR_CAP_STOP_CONT;
316 ioctl(s->video_fd, METEORCAPTUR, &c);
317 close(s->video_fd);
318
319 c = AUDIO_MUTE;
320 ioctl(s->tuner_fd, BT848_SAUDIO, &c);
321 close(s->tuner_fd);
322
323 munmap((caddr_t)video_buf, video_buf_size);
324
325 return 0;
326}
327
328#define OFFSET(x) offsetof(VideoData, x)
329#define DEC AV_OPT_FLAG_DECODING_PARAM
330static const AVOption options[] = {
331 { "standard", "", offsetof(VideoData, standard), AV_OPT_TYPE_INT, {.i64 = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
332 { "PAL", "", 0, AV_OPT_TYPE_CONST, {.i64 = PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
333 { "NTSC", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
334 { "SECAM", "", 0, AV_OPT_TYPE_CONST, {.i64 = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
335 { "PALN", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALN}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
336 { "PALM", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
337 { "NTSCJ", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
338 { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC },
339 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
340 { NULL },
341};
342
343static const AVClass bktr_class = {
344 .class_name = "BKTR grab interface",
345 .item_name = av_default_item_name,
346 .option = options,
347 .version = LIBAVUTIL_VERSION_INT,
348 .category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
349};
350
351AVInputFormat ff_bktr_demuxer = {
352 .name = "bktr",
353 .long_name = NULL_IF_CONFIG_SMALL("video grab"),
354 .priv_data_size = sizeof(VideoData),
355 .read_header = grab_read_header,
356 .read_packet = grab_read_packet,
357 .read_close = grab_read_close,
358 .flags = AVFMT_NOFILE,
359 .priv_class = &bktr_class,
360};
361
generated by cgit at 2024-05-17 06:13:40 (GMT)