video4linux2 input support
[libav.git] / libavformat / grab_bktr.c
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 Gerard Lantau.
7 * and
8 * simple_grab.c Copyright (c) 1999 Roger Hardiman
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24 #include "avformat.h"
25 #if defined(__FreeBSD__)
26 # if __FreeBSD__ >= 502100
27 # include <dev/bktr/ioctl_meteor.h>
28 # include <dev/bktr/ioctl_bt848.h>
29 # else
30 # include <machine/ioctl_meteor.h>
31 # include <machine/ioctl_bt848.h>
32 # endif
33 #elif defined(__DragonFly__)
34 # include <dev/video/meteor/ioctl_meteor.h>
35 # include <dev/video/bktr/ioctl_bt848.h>
36 #else
37 # include <dev/ic/bt8xx.h>
38 #endif
39 #include <unistd.h>
40 #include <fcntl.h>
41 #include <sys/ioctl.h>
42 #include <sys/mman.h>
43 #include <sys/time.h>
44 #include <signal.h>
45
46 typedef struct {
47 int video_fd;
48 int tuner_fd;
49 int width, height;
50 int frame_rate;
51 int frame_rate_base;
52 u_int64_t per_frame;
53 } VideoData;
54
55
56 #define PAL 1
57 #define PALBDGHI 1
58 #define NTSC 2
59 #define NTSCM 2
60 #define SECAM 3
61 #define PALN 4
62 #define PALM 5
63 #define NTSCJ 6
64
65 /* PAL is 768 x 576. NTSC is 640 x 480 */
66 #define PAL_HEIGHT 576
67 #define SECAM_HEIGHT 576
68 #define NTSC_HEIGHT 480
69
70 #ifndef VIDEO_FORMAT
71 #define VIDEO_FORMAT NTSC
72 #endif
73
74 static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
75 METEOR_DEV3, METEOR_DEV_SVIDEO };
76
77 uint8_t *video_buf;
78 size_t video_buf_size;
79 u_int64_t last_frame_time;
80 volatile sig_atomic_t nsignals;
81
82
83 static void catchsignal(int signal)
84 {
85 nsignals++;
86 return;
87 }
88
89 static int bktr_init(const char *video_device, int width, int height,
90 int format, int *video_fd, int *tuner_fd, int idev, double frequency)
91 {
92 struct meteor_geomet geo;
93 int h_max;
94 long ioctl_frequency;
95 char *arg;
96 int c;
97 struct sigaction act, old;
98
99 if (idev < 0 || idev > 4)
100 {
101 arg = getenv ("BKTR_DEV");
102 if (arg)
103 idev = atoi (arg);
104 if (idev < 0 || idev > 4)
105 idev = 1;
106 }
107
108 if (format < 1 || format > 6)
109 {
110 arg = getenv ("BKTR_FORMAT");
111 if (arg)
112 format = atoi (arg);
113 if (format < 1 || format > 6)
114 format = VIDEO_FORMAT;
115 }
116
117 if (frequency <= 0)
118 {
119 arg = getenv ("BKTR_FREQUENCY");
120 if (arg)
121 frequency = atof (arg);
122 if (frequency <= 0)
123 frequency = 0.0;
124 }
125
126 memset(&act, 0, sizeof(act));
127 sigemptyset(&act.sa_mask);
128 act.sa_handler = catchsignal;
129 sigaction(SIGUSR1, &act, &old);
130
131 *tuner_fd = open("/dev/tuner0", O_RDONLY);
132 if (*tuner_fd < 0)
133 perror("Warning: Tuner not opened, continuing");
134
135 *video_fd = open(video_device, O_RDONLY);
136 if (*video_fd < 0) {
137 perror(video_device);
138 return -1;
139 }
140
141 geo.rows = height;
142 geo.columns = width;
143 geo.frames = 1;
144 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
145
146 switch (format) {
147 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
148 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
149 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
150 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
151 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
152 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
153 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
154 }
155
156 if (height <= h_max / 2)
157 geo.oformat |= METEOR_GEO_EVEN_ONLY;
158
159 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
160 perror("METEORSETGEO");
161 return -1;
162 }
163
164 if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
165 perror("BT848SFMT");
166 return -1;
167 }
168
169 c = bktr_dev[idev];
170 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
171 perror("METEORSINPUT");
172 return -1;
173 }
174
175 video_buf_size = width * height * 12 / 8;
176
177 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
178 PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
179 if (video_buf == MAP_FAILED) {
180 perror("mmap");
181 return -1;
182 }
183
184 if (frequency != 0.0) {
185 ioctl_frequency = (unsigned long)(frequency*16);
186 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
187 perror("TVTUNER_SETFREQ");
188 }
189
190 c = AUDIO_UNMUTE;
191 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
192 perror("TVTUNER_SAUDIO");
193
194 c = METEOR_CAP_CONTINOUS;
195 ioctl(*video_fd, METEORCAPTUR, &c);
196
197 c = SIGUSR1;
198 ioctl(*video_fd, METEORSSIGNAL, &c);
199
200 return 0;
201 }
202
203 static void bktr_getframe(u_int64_t per_frame)
204 {
205 u_int64_t curtime;
206
207 curtime = av_gettime();
208 if (!last_frame_time
209 || ((last_frame_time + per_frame) > curtime)) {
210 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
211 if (!nsignals)
212 av_log(NULL, AV_LOG_INFO,
213 "SLEPT NO signals - %d microseconds late\n",
214 (int)(av_gettime() - last_frame_time - per_frame));
215 }
216 }
217 nsignals = 0;
218 last_frame_time = curtime;
219 }
220
221
222 /* note: we support only one picture read at a time */
223 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
224 {
225 VideoData *s = s1->priv_data;
226
227 if (av_new_packet(pkt, video_buf_size) < 0)
228 return -EIO;
229
230 bktr_getframe(s->per_frame);
231
232 pkt->pts = av_gettime();
233 memcpy(pkt->data, video_buf, video_buf_size);
234
235 return video_buf_size;
236 }
237
238 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
239 {
240 VideoData *s = s1->priv_data;
241 AVStream *st;
242 int width, height;
243 int frame_rate;
244 int frame_rate_base;
245 int format = -1;
246 const char *video_device;
247
248 if (!ap || ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0)
249 return -1;
250
251 width = ap->width;
252 height = ap->height;
253 frame_rate = ap->time_base.den;
254 frame_rate_base = ap->time_base.num;
255
256 video_device = ap->device;
257 if (!video_device)
258 video_device = "/dev/bktr0";
259
260 st = av_new_stream(s1, 0);
261 if (!st)
262 return -ENOMEM;
263 av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
264
265 s->width = width;
266 s->height = height;
267 s->frame_rate = frame_rate;
268 s->frame_rate_base = frame_rate_base;
269 s->per_frame = ((u_int64_t)1000000 * s->frame_rate_base) / s->frame_rate;
270
271 st->codec->codec_type = CODEC_TYPE_VIDEO;
272 st->codec->pix_fmt = PIX_FMT_YUV420P;
273 st->codec->codec_id = CODEC_ID_RAWVIDEO;
274 st->codec->width = width;
275 st->codec->height = height;
276 st->codec->time_base.den = frame_rate;
277 st->codec->time_base.num = frame_rate_base;
278
279 if (ap->standard) {
280 if (!strcasecmp(ap->standard, "pal"))
281 format = PAL;
282 else if (!strcasecmp(ap->standard, "secam"))
283 format = SECAM;
284 else if (!strcasecmp(ap->standard, "ntsc"))
285 format = NTSC;
286 }
287
288 if (bktr_init(video_device, width, height, format,
289 &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0)
290 return -EIO;
291
292 nsignals = 0;
293 last_frame_time = 0;
294
295 return 0;
296 }
297
298 static int grab_read_close(AVFormatContext *s1)
299 {
300 VideoData *s = s1->priv_data;
301 int c;
302
303 c = METEOR_CAP_STOP_CONT;
304 ioctl(s->video_fd, METEORCAPTUR, &c);
305 close(s->video_fd);
306
307 c = AUDIO_MUTE;
308 ioctl(s->tuner_fd, BT848_SAUDIO, &c);
309 close(s->tuner_fd);
310
311 munmap((caddr_t)video_buf, video_buf_size);
312
313 return 0;
314 }
315
316 AVInputFormat video_grab_device_format = {
317 "bktr",
318 "video grab",
319 sizeof(VideoData),
320 NULL,
321 grab_read_header,
322 grab_read_packet,
323 grab_read_close,
324 .flags = AVFMT_NOFILE,
325 };
326
327 int video_grab_init(void)
328 {
329 av_register_input_format(&video_grab_device_format);
330 return 0;
331 }