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  • only in /asuswrt-rt-n18u-9.0.0.4.380.2695/release/src-rt-6.x.4708/router/ffmpeg/libavdevice/
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
52typedef 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
80static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
81    METEOR_DEV3, METEOR_DEV_SVIDEO };
82
83uint8_t *video_buf;
84size_t video_buf_size;
85uint64_t last_frame_time;
86volatile sig_atomic_t nsignals;
87
88
89static void catchsignal(int signal)
90{
91    nsignals++;
92    return;
93}
94
95static 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
209static 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 */
229static 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
244static 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
299static 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
317AVInputFormat 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};
327