h264_metadata: Add option to delete filler data
[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 Libav.
11 *
12 * Libav 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 * Libav 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 Libav; 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/avformat.h"
28 #include "libavformat/internal.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/log.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/parseutils.h"
33 #include "libavutil/time.h"
34 #if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
35 # include <dev/bktr/ioctl_meteor.h>
36 # include <dev/bktr/ioctl_bt848.h>
37 #elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
38 # include <machine/ioctl_meteor.h>
39 # include <machine/ioctl_bt848.h>
40 #elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
41 # include <dev/video/meteor/ioctl_meteor.h>
42 # include <dev/video/bktr/ioctl_bt848.h>
43 #elif HAVE_DEV_IC_BT8XX_H
44 # include <dev/ic/bt8xx.h>
45 #endif
46 #include <unistd.h>
47 #include <fcntl.h>
48 #include <sys/ioctl.h>
49 #include <sys/mman.h>
50 #include <sys/time.h>
51 #include <signal.h>
52 #include <stdint.h>
53
54 typedef 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 *video_size; /**< String describing video size, set by a private option. */
62 char *framerate; /**< Set by a private option. */
63 } VideoData;
64
65
66 #define PAL 1
67 #define PALBDGHI 1
68 #define NTSC 2
69 #define NTSCM 2
70 #define SECAM 3
71 #define PALN 4
72 #define PALM 5
73 #define NTSCJ 6
74
75 /* PAL is 768 x 576. NTSC is 640 x 480 */
76 #define PAL_HEIGHT 576
77 #define SECAM_HEIGHT 576
78 #define NTSC_HEIGHT 480
79
80 #ifndef VIDEO_FORMAT
81 #define VIDEO_FORMAT NTSC
82 #endif
83
84 static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
85 METEOR_DEV3, METEOR_DEV_SVIDEO };
86
87 uint8_t *video_buf;
88 size_t video_buf_size;
89 uint64_t last_frame_time;
90 volatile sig_atomic_t nsignals;
91
92
93 static void catchsignal(int signal)
94 {
95 nsignals++;
96 return;
97 }
98
99 static av_cold int bktr_init(const char *video_device, int width, int height,
100 int format, int *video_fd, int *tuner_fd, int idev, double frequency)
101 {
102 struct meteor_geomet geo;
103 int h_max;
104 long ioctl_frequency;
105 char *arg;
106 int c;
107 struct sigaction act, old;
108 int ret;
109 char errbuf[128];
110
111 if (idev < 0 || idev > 4)
112 {
113 arg = getenv ("BKTR_DEV");
114 if (arg)
115 idev = atoi (arg);
116 if (idev < 0 || idev > 4)
117 idev = 1;
118 }
119
120 if (format < 1 || format > 6)
121 {
122 arg = getenv ("BKTR_FORMAT");
123 if (arg)
124 format = atoi (arg);
125 if (format < 1 || format > 6)
126 format = VIDEO_FORMAT;
127 }
128
129 if (frequency <= 0)
130 {
131 arg = getenv ("BKTR_FREQUENCY");
132 if (arg)
133 frequency = atof (arg);
134 if (frequency <= 0)
135 frequency = 0.0;
136 }
137
138 memset(&act, 0, sizeof(act));
139 sigemptyset(&act.sa_mask);
140 act.sa_handler = catchsignal;
141 sigaction(SIGUSR1, &act, &old);
142
143 *tuner_fd = avpriv_open("/dev/tuner0", O_RDONLY);
144 if (*tuner_fd < 0)
145 av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
146
147 *video_fd = avpriv_open(video_device, O_RDONLY);
148 if (*video_fd < 0) {
149 ret = AVERROR(errno);
150 av_strerror(ret, errbuf, sizeof(errbuf));
151 av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, errbuf);
152 return ret;
153 }
154
155 geo.rows = height;
156 geo.columns = width;
157 geo.frames = 1;
158 geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
159
160 switch (format) {
161 case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
162 case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
163 case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
164 case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
165 case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
166 case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
167 default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
168 }
169
170 if (height <= h_max / 2)
171 geo.oformat |= METEOR_GEO_EVEN_ONLY;
172
173 if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
174 ret = AVERROR(errno);
175 av_strerror(ret, errbuf, sizeof(errbuf));
176 av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", errbuf);
177 return ret;
178 }
179
180 if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
181 ret = AVERROR(errno);
182 av_strerror(ret, errbuf, sizeof(errbuf));
183 av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", errbuf);
184 return ret;
185 }
186
187 c = bktr_dev[idev];
188 if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
189 ret = AVERROR(errno);
190 av_strerror(ret, errbuf, sizeof(errbuf));
191 av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", errbuf);
192 return ret;
193 }
194
195 video_buf_size = width * height * 12 / 8;
196
197 video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
198 PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
199 if (video_buf == MAP_FAILED) {
200 ret = AVERROR(errno);
201 av_strerror(ret, errbuf, sizeof(errbuf));
202 av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", errbuf);
203 return ret;
204 }
205
206 if (frequency != 0.0) {
207 ioctl_frequency = (unsigned long)(frequency*16);
208 if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
209 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
210 }
211
212 c = AUDIO_UNMUTE;
213 if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
214 av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
215
216 c = METEOR_CAP_CONTINOUS;
217 ioctl(*video_fd, METEORCAPTUR, &c);
218
219 c = SIGUSR1;
220 ioctl(*video_fd, METEORSSIGNAL, &c);
221
222 return 0;
223 }
224
225 static void bktr_getframe(uint64_t per_frame)
226 {
227 uint64_t curtime;
228
229 curtime = av_gettime();
230 if (!last_frame_time
231 || ((last_frame_time + per_frame) > curtime)) {
232 if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
233 if (!nsignals)
234 av_log(NULL, AV_LOG_INFO,
235 "SLEPT NO signals - %d microseconds late\n",
236 (int)(av_gettime() - last_frame_time - per_frame));
237 }
238 }
239 nsignals = 0;
240 last_frame_time = curtime;
241 }
242
243
244 /* note: we support only one picture read at a time */
245 static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
246 {
247 VideoData *s = s1->priv_data;
248
249 if (av_new_packet(pkt, video_buf_size) < 0)
250 return AVERROR(EIO);
251
252 bktr_getframe(s->per_frame);
253
254 pkt->pts = av_gettime();
255 memcpy(pkt->data, video_buf, video_buf_size);
256
257 return video_buf_size;
258 }
259
260 static int grab_read_header(AVFormatContext *s1)
261 {
262 VideoData *s = s1->priv_data;
263 AVStream *st;
264 int width, height;
265 AVRational framerate;
266 int ret = 0;
267
268 if ((ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
269 av_log(s1, AV_LOG_ERROR, "Could not parse video size '%s'.\n", s->video_size);
270 goto out;
271 }
272
273 if (!s->framerate)
274 switch (s->standard) {
275 case PAL: s->framerate = av_strdup("pal"); break;
276 case NTSC: s->framerate = av_strdup("ntsc"); break;
277 case SECAM: s->framerate = av_strdup("25"); break;
278 default:
279 av_log(s1, AV_LOG_ERROR, "Unknown standard.\n");
280 ret = AVERROR(EINVAL);
281 goto out;
282 }
283 if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
284 av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate);
285 goto out;
286 }
287
288 st = avformat_new_stream(s1, NULL);
289 if (!st) {
290 ret = AVERROR(ENOMEM);
291 goto out;
292 }
293 avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
294
295 s->width = width;
296 s->height = height;
297 s->per_frame = ((uint64_t)1000000 * framerate.den) / framerate.num;
298
299 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
300 st->codecpar->format = AV_PIX_FMT_YUV420P;
301 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
302 st->codecpar->width = width;
303 st->codecpar->height = height;
304 st->avg_frame_rate = framerate;
305
306
307 if (bktr_init(s1->filename, width, height, s->standard,
308 &s->video_fd, &s->tuner_fd, -1, 0.0) < 0) {
309 ret = AVERROR(EIO);
310 goto out;
311 }
312
313 nsignals = 0;
314 last_frame_time = 0;
315
316 out:
317 return ret;
318 }
319
320 static int grab_read_close(AVFormatContext *s1)
321 {
322 VideoData *s = s1->priv_data;
323 int c;
324
325 c = METEOR_CAP_STOP_CONT;
326 ioctl(s->video_fd, METEORCAPTUR, &c);
327 close(s->video_fd);
328
329 c = AUDIO_MUTE;
330 ioctl(s->tuner_fd, BT848_SAUDIO, &c);
331 close(s->tuner_fd);
332
333 munmap((caddr_t)video_buf, video_buf_size);
334
335 return 0;
336 }
337
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), AV_OPT_TYPE_INT, {.i64 = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
342 { "PAL", "", 0, AV_OPT_TYPE_CONST, {.i64 = PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
343 { "NTSC", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
344 { "SECAM", "", 0, AV_OPT_TYPE_CONST, {.i64 = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
345 { "PALN", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALN}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
346 { "PALM", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
347 { "NTSCJ", "", 0, AV_OPT_TYPE_CONST, {.i64 = 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), AV_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC },
349 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
350 { NULL },
351 };
352
353 static const AVClass bktr_class = {
354 .class_name = "BKTR grab interface",
355 .item_name = av_default_item_name,
356 .option = options,
357 .version = LIBAVUTIL_VERSION_INT,
358 };
359
360 AVInputFormat ff_bktr_demuxer = {
361 .name = "bktr",
362 .long_name = NULL_IF_CONFIG_SMALL("video grab"),
363 .priv_data_size = sizeof(VideoData),
364 .read_header = grab_read_header,
365 .read_packet = grab_read_packet,
366 .read_close = grab_read_close,
367 .flags = AVFMT_NOFILE,
368 .priv_class = &bktr_class,
369 };