Add entry for AVFilterPicRef interlaced and top_field_first fields
[libav.git] / libavdevice / 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 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 #define _BSD_SOURCE 1
28 #define _NETBSD_SOURCE
29
30 #include "libavformat/avformat.h"
31 #if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
32 # include <dev/bktr/ioctl_meteor.h>
33 # include <dev/bktr/ioctl_bt848.h>
34 #elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
35 # include <machine/ioctl_meteor.h>
36 # include <machine/ioctl_bt848.h>
37 #elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
38 # include <dev/video/meteor/ioctl_meteor.h>
39 # include <dev/video/bktr/ioctl_bt848.h>
40 #elif HAVE_DEV_IC_BT8XX_H
41 # include <dev/ic/bt8xx.h>
42 #endif
43 #include <unistd.h>
44 #include <fcntl.h>
45 #include <sys/ioctl.h>
46 #include <sys/mman.h>
47 #include <sys/time.h>
48 #include <signal.h>
49 #include <stdint.h>
50 #include <strings.h>
51
52 typedef struct {
53 int video_fd;
54 int tuner_fd;
55 int width, height;
56 int frame_rate;
57 int frame_rate_base;
58 uint64_t per_frame;
59 } VideoData;
60
61
62 #define PAL 1
63 #define PALBDGHI 1
64 #define NTSC 2
65 #define NTSCM 2
66 #define SECAM 3
67 #define PALN 4
68 #define PALM 5
69 #define NTSCJ 6
70
71 /* PAL is 768 x 576. NTSC is 640 x 480 */
72 #define PAL_HEIGHT 576
73 #define SECAM_HEIGHT 576
74 #define NTSC_HEIGHT 480
75
76 #ifndef VIDEO_FORMAT
77 #define VIDEO_FORMAT NTSC
78 #endif
79
80 static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
81 METEOR_DEV3, METEOR_DEV_SVIDEO };
82
83 uint8_t *video_buf;
84 size_t video_buf_size;
85 uint64_t last_frame_time;
86 volatile sig_atomic_t nsignals;
87
88
89 static void catchsignal(int signal)
90 {
91 nsignals++;
92 return;
93 }
94
95 static av_cold int bktr_init(const char *video_device, int width, int height,
96 int format, int *video_fd, int *tuner_fd, int idev, double frequency)
97 {
98 struct meteor_geomet geo;
99 int h_max;
100 long ioctl_frequency;
101 char *arg;
102 int c;
103 struct sigaction act, old;
104
105 if (idev < 0 || idev > 4)
106 {
107 arg = getenv ("BKTR_DEV");
108 if (arg)
109 idev = atoi (arg);
110 if (idev < 0 || idev > 4)
111 idev = 1;
112 }
113
114 if (format < 1 || format > 6)
115 {
116 arg = getenv ("BKTR_FORMAT");
117 if (arg)
118 format = atoi (arg);
119 if (format < 1 || format > 6)
120 format = VIDEO_FORMAT;
121 }
122
123 if (frequency <= 0)
124 {
125 arg = getenv ("BKTR_FREQUENCY");
126 if (arg)
127 frequency = atof (arg);
128 if (frequency <= 0)
129 frequency = 0.0;
130 }
131
132 memset(&act, 0, sizeof(act));
133 sigemptyset(&act.sa_mask);
134 act.sa_handler = catchsignal;
135 sigaction(SIGUSR1, &act, &old);
136
137 *tuner_fd = open("/dev/tuner0", O_RDONLY);
138 if (*tuner_fd < 0)
139 av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
140
141 *video_fd = open(video_device, O_RDONLY);
142 if (*video_fd < 0) {
143 av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno));
144 return -1;
145 }
146
147 geo.rows = height;
148 geo.columns = width;
149 geo.frames = 1;
150 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
151
152 switch (format) {
153 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
154 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
155 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
156 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
157 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
158 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
159 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
160 }
161
162 if (height <= h_max / 2)
163 geo.oformat |= METEOR_GEO_EVEN_ONLY;
164
165 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
166 av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno));
167 return -1;
168 }
169
170 if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
171 av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno));
172 return -1;
173 }
174
175 c = bktr_dev[idev];
176 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
177 av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno));
178 return -1;
179 }
180
181 video_buf_size = width * height * 12 / 8;
182
183 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
184 PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
185 if (video_buf == MAP_FAILED) {
186 av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
187 return -1;
188 }
189
190 if (frequency != 0.0) {
191 ioctl_frequency = (unsigned long)(frequency*16);
192 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
193 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
194 }
195
196 c = AUDIO_UNMUTE;
197 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
198 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
199
200 c = METEOR_CAP_CONTINOUS;
201 ioctl(*video_fd, METEORCAPTUR, &c);
202
203 c = SIGUSR1;
204 ioctl(*video_fd, METEORSSIGNAL, &c);
205
206 return 0;
207 }
208
209 static void bktr_getframe(uint64_t per_frame)
210 {
211 uint64_t curtime;
212
213 curtime = av_gettime();
214 if (!last_frame_time
215 || ((last_frame_time + per_frame) > curtime)) {
216 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
217 if (!nsignals)
218 av_log(NULL, AV_LOG_INFO,
219 "SLEPT NO signals - %d microseconds late\n",
220 (int)(av_gettime() - last_frame_time - per_frame));
221 }
222 }
223 nsignals = 0;
224 last_frame_time = curtime;
225 }
226
227
228 /* note: we support only one picture read at a time */
229 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
230 {
231 VideoData *s = s1->priv_data;
232
233 if (av_new_packet(pkt, video_buf_size) < 0)
234 return AVERROR(EIO);
235
236 bktr_getframe(s->per_frame);
237
238 pkt->pts = av_gettime();
239 memcpy(pkt->data, video_buf, video_buf_size);
240
241 return video_buf_size;
242 }
243
244 static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
245 {
246 VideoData *s = s1->priv_data;
247 AVStream *st;
248 int width, height;
249 int frame_rate;
250 int frame_rate_base;
251 int format = -1;
252
253 if (ap->width <= 0 || ap->height <= 0 || ap->time_base.den <= 0)
254 return -1;
255
256 width = ap->width;
257 height = ap->height;
258 frame_rate = ap->time_base.den;
259 frame_rate_base = ap->time_base.num;
260
261 st = av_new_stream(s1, 0);
262 if (!st)
263 return AVERROR(ENOMEM);
264 av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
265
266 s->width = width;
267 s->height = height;
268 s->frame_rate = frame_rate;
269 s->frame_rate_base = frame_rate_base;
270 s->per_frame = ((uint64_t)1000000 * s->frame_rate_base) / s->frame_rate;
271
272 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
273 st->codec->pix_fmt = PIX_FMT_YUV420P;
274 st->codec->codec_id = CODEC_ID_RAWVIDEO;
275 st->codec->width = width;
276 st->codec->height = height;
277 st->codec->time_base.den = frame_rate;
278 st->codec->time_base.num = frame_rate_base;
279
280 if (ap->standard) {
281 if (!strcasecmp(ap->standard, "pal"))
282 format = PAL;
283 else if (!strcasecmp(ap->standard, "secam"))
284 format = SECAM;
285 else if (!strcasecmp(ap->standard, "ntsc"))
286 format = NTSC;
287 }
288
289 if (bktr_init(s1->filename, width, height, format,
290 &(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0)
291 return AVERROR(EIO);
292
293 nsignals = 0;
294 last_frame_time = 0;
295
296 return 0;
297 }
298
299 static int grab_read_close(AVFormatContext *s1)
300 {
301 VideoData *s = s1->priv_data;
302 int c;
303
304 c = METEOR_CAP_STOP_CONT;
305 ioctl(s->video_fd, METEORCAPTUR, &c);
306 close(s->video_fd);
307
308 c = AUDIO_MUTE;
309 ioctl(s->tuner_fd, BT848_SAUDIO, &c);
310 close(s->tuner_fd);
311
312 munmap((caddr_t)video_buf, video_buf_size);
313
314 return 0;
315 }
316
317 AVInputFormat bktr_demuxer = {
318 "bktr",
319 NULL_IF_CONFIG_SMALL("video grab"),
320 sizeof(VideoData),
321 NULL,
322 grab_read_header,
323 grab_read_packet,
324 grab_read_close,
325 .flags = AVFMT_NOFILE,
326 };