allow individual selection of muxers and demuxers
[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(__FreeBSD_kernel__)
34 # include <dev/bktr/ioctl_meteor.h>
35 # include <dev/bktr/ioctl_bt848.h>
36 #elif defined(__DragonFly__)
37 # include <dev/video/meteor/ioctl_meteor.h>
38 # include <dev/video/bktr/ioctl_bt848.h>
39 #else
40 # include <dev/ic/bt8xx.h>
41 #endif
42 #include <unistd.h>
43 #include <fcntl.h>
44 #include <sys/ioctl.h>
45 #include <sys/mman.h>
46 #include <sys/time.h>
47 #include <signal.h>
48
49 typedef struct {
50 int video_fd;
51 int tuner_fd;
52 int width, height;
53 int frame_rate;
54 int frame_rate_base;
55 u_int64_t per_frame;
56 } VideoData;
57
58
59 #define PAL 1
60 #define PALBDGHI 1
61 #define NTSC 2
62 #define NTSCM 2
63 #define SECAM 3
64 #define PALN 4
65 #define PALM 5
66 #define NTSCJ 6
67
68 /* PAL is 768 x 576. NTSC is 640 x 480 */
69 #define PAL_HEIGHT 576
70 #define SECAM_HEIGHT 576
71 #define NTSC_HEIGHT 480
72
73 #ifndef VIDEO_FORMAT
74 #define VIDEO_FORMAT NTSC
75 #endif
76
77 static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
78 METEOR_DEV3, METEOR_DEV_SVIDEO };
79
80 uint8_t *video_buf;
81 size_t video_buf_size;
82 u_int64_t last_frame_time;
83 volatile sig_atomic_t nsignals;
84
85
86 static void catchsignal(int signal)
87 {
88 nsignals++;
89 return;
90 }
91
92 static int bktr_init(const char *video_device, int width, int height,
93 int format, int *video_fd, int *tuner_fd, int idev, double frequency)
94 {
95 struct meteor_geomet geo;
96 int h_max;
97 long ioctl_frequency;
98 char *arg;
99 int c;
100 struct sigaction act, old;
101
102 if (idev < 0 || idev > 4)
103 {
104 arg = getenv ("BKTR_DEV");
105 if (arg)
106 idev = atoi (arg);
107 if (idev < 0 || idev > 4)
108 idev = 1;
109 }
110
111 if (format < 1 || format > 6)
112 {
113 arg = getenv ("BKTR_FORMAT");
114 if (arg)
115 format = atoi (arg);
116 if (format < 1 || format > 6)
117 format = VIDEO_FORMAT;
118 }
119
120 if (frequency <= 0)
121 {
122 arg = getenv ("BKTR_FREQUENCY");
123 if (arg)
124 frequency = atof (arg);
125 if (frequency <= 0)
126 frequency = 0.0;
127 }
128
129 memset(&act, 0, sizeof(act));
130 sigemptyset(&act.sa_mask);
131 act.sa_handler = catchsignal;
132 sigaction(SIGUSR1, &act, &old);
133
134 *tuner_fd = open("/dev/tuner0", O_RDONLY);
135 if (*tuner_fd < 0)
136 perror("Warning: Tuner not opened, continuing");
137
138 *video_fd = open(video_device, O_RDONLY);
139 if (*video_fd < 0) {
140 perror(video_device);
141 return -1;
142 }
143
144 geo.rows = height;
145 geo.columns = width;
146 geo.frames = 1;
147 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
148
149 switch (format) {
150 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
151 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
152 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
153 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
154 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
155 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
156 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
157 }
158
159 if (height <= h_max / 2)
160 geo.oformat |= METEOR_GEO_EVEN_ONLY;
161
162 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
163 perror("METEORSETGEO");
164 return -1;
165 }
166
167 if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
168 perror("BT848SFMT");
169 return -1;
170 }
171
172 c = bktr_dev[idev];
173 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
174 perror("METEORSINPUT");
175 return -1;
176 }
177
178 video_buf_size = width * height * 12 / 8;
179
180 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
181 PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
182 if (video_buf == MAP_FAILED) {
183 perror("mmap");
184 return -1;
185 }
186
187 if (frequency != 0.0) {
188 ioctl_frequency = (unsigned long)(frequency*16);
189 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
190 perror("TVTUNER_SETFREQ");
191 }
192
193 c = AUDIO_UNMUTE;
194 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
195 perror("TVTUNER_SAUDIO");
196
197 c = METEOR_CAP_CONTINOUS;
198 ioctl(*video_fd, METEORCAPTUR, &c);
199
200 c = SIGUSR1;
201 ioctl(*video_fd, METEORSSIGNAL, &c);
202
203 return 0;
204 }
205
206 static void bktr_getframe(u_int64_t per_frame)
207 {
208 u_int64_t curtime;
209
210 curtime = av_gettime();
211 if (!last_frame_time
212 || ((last_frame_time + per_frame) > curtime)) {
213 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
214 if (!nsignals)
215 av_log(NULL, AV_LOG_INFO,
216 "SLEPT NO signals - %d microseconds late\n",
217 (int)(av_gettime() - last_frame_time - per_frame));
218 }
219 }
220 nsignals = 0;
221 last_frame_time = curtime;
222 }
223
224
225 /* note: we support only one picture read at a time */
226 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
227 {
228 VideoData *s = s1->priv_data;
229
230 if (av_new_packet(pkt, video_buf_size) < 0)
231 return -EIO;
232
233 bktr_getframe(s->per_frame);
234
235 pkt->pts = av_gettime();
236 memcpy(pkt->data, video_buf, video_buf_size);
237
238 return video_buf_size;
239 }
240
241 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
242 {
243 VideoData *s = s1->priv_data;
244 AVStream *st;
245 int width, height;
246 int frame_rate;
247 int frame_rate_base;
248 int format = -1;
249 const char *video_device;
250
251 if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0)
252 return -1;
253
254 width = ap->width;
255 height = ap->height;
256 frame_rate = ap->time_base.den;
257 frame_rate_base = ap->time_base.num;
258
259 video_device = ap->device;
260 if (!video_device)
261 video_device = "/dev/bktr0";
262
263 st = av_new_stream(s1, 0);
264 if (!st)
265 return -ENOMEM;
266 av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
267
268 s->width = width;
269 s->height = height;
270 s->frame_rate = frame_rate;
271 s->frame_rate_base = frame_rate_base;
272 s->per_frame = ((u_int64_t)1000000 * s->frame_rate_base) / s->frame_rate;
273
274 st->codec->codec_type = CODEC_TYPE_VIDEO;
275 st->codec->pix_fmt = PIX_FMT_YUV420P;
276 st->codec->codec_id = CODEC_ID_RAWVIDEO;
277 st->codec->width = width;
278 st->codec->height = height;
279 st->codec->time_base.den = frame_rate;
280 st->codec->time_base.num = frame_rate_base;
281
282 if (ap->standard) {
283 if (!strcasecmp(ap->standard, "pal"))
284 format = PAL;
285 else if (!strcasecmp(ap->standard, "secam"))
286 format = SECAM;
287 else if (!strcasecmp(ap->standard, "ntsc"))
288 format = NTSC;
289 }
290
291 if (bktr_init(video_device, width, height, format,
292 &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0)
293 return -EIO;
294
295 nsignals = 0;
296 last_frame_time = 0;
297
298 return 0;
299 }
300
301 static int grab_read_close(AVFormatContext *s1)
302 {
303 VideoData *s = s1->priv_data;
304 int c;
305
306 c = METEOR_CAP_STOP_CONT;
307 ioctl(s->video_fd, METEORCAPTUR, &c);
308 close(s->video_fd);
309
310 c = AUDIO_MUTE;
311 ioctl(s->tuner_fd, BT848_SAUDIO, &c);
312 close(s->tuner_fd);
313
314 munmap((caddr_t)video_buf, video_buf_size);
315
316 return 0;
317 }
318
319 AVInputFormat video_grab_device_demuxer = {
320 "bktr",
321 "video grab",
322 sizeof(VideoData),
323 NULL,
324 grab_read_header,
325 grab_read_packet,
326 grab_read_close,
327 .flags = AVFMT_NOFILE,
328 };