[deb_ffmpeg.git] / ffmpeg / libavdevice / bktr.c

/*
 * *BSD video grab interface
 * Copyright (c) 2002 Steve O'Hara-Smith
 * based on
 *           Linux video grab interface
 *           Copyright (c) 2000, 2001 Fabrice Bellard
 * and
 *           simple_grab.c Copyright (c) 1999 Roger Hardiman
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "libavformat/internal.h"
#include "libavutil/internal.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/time.h"
#if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
# include <dev/bktr/ioctl_meteor.h>
# include <dev/bktr/ioctl_bt848.h>
#elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
# include <machine/ioctl_meteor.h>
# include <machine/ioctl_bt848.h>
#elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
# include <dev/video/meteor/ioctl_meteor.h>
# include <dev/video/bktr/ioctl_bt848.h>
#elif HAVE_DEV_IC_BT8XX_H
# include <dev/ic/bt8xx.h>
#endif
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/time.h>
#include <signal.h>
#include <stdint.h>
#include "avdevice.h"

typedef struct VideoData {
    AVClass *class;
    int video_fd;
    int tuner_fd;
    int width, height;
    uint64_t per_frame;
    int standard;
    char *framerate;  /**< Set by a private option. */
} VideoData;


#define PAL 1
#define PALBDGHI 1
#define NTSC 2
#define NTSCM 2
#define SECAM 3
#define PALN 4
#define PALM 5
#define NTSCJ 6

/* PAL is 768 x 576. NTSC is 640 x 480 */
#define PAL_HEIGHT 576
#define SECAM_HEIGHT 576
#define NTSC_HEIGHT 480

#ifndef VIDEO_FORMAT
#define VIDEO_FORMAT NTSC
#endif

static const int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
    METEOR_DEV3, METEOR_DEV_SVIDEO };

uint8_t *video_buf;
size_t video_buf_size;
uint64_t last_frame_time;
volatile sig_atomic_t nsignals;


static void catchsignal(int signal)
{
    nsignals++;
    return;
}

static av_cold int bktr_init(const char *video_device, int width, int height,
    int format, int *video_fd, int *tuner_fd, int idev, double frequency)
{
    struct meteor_geomet geo;
    int h_max;
    long ioctl_frequency;
    char *arg;
    int c;
    struct sigaction act = { {0} }, old;

    if (idev < 0 || idev > 4)
    {
        arg = getenv ("BKTR_DEV");
        if (arg)
            idev = atoi (arg);
        if (idev < 0 || idev > 4)
            idev = 1;
    }

    if (format < 1 || format > 6)
    {
        arg = getenv ("BKTR_FORMAT");
        if (arg)
            format = atoi (arg);
        if (format < 1 || format > 6)
            format = VIDEO_FORMAT;
    }

    if (frequency <= 0)
    {
        arg = getenv ("BKTR_FREQUENCY");
        if (arg)
            frequency = atof (arg);
        if (frequency <= 0)
            frequency = 0.0;
    }

    sigemptyset(&act.sa_mask);
    act.sa_handler = catchsignal;
    sigaction(SIGUSR1, &act, &old);

    *tuner_fd = avpriv_open("/dev/tuner0", O_RDONLY);
    if (*tuner_fd < 0)
        av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));

    *video_fd = avpriv_open(video_device, O_RDONLY);
    if (*video_fd < 0) {
        av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno));
        return -1;
    }

    geo.rows = height;
    geo.columns = width;
    geo.frames = 1;
    geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;

    switch (format) {
    case PAL:   h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALBDGHI; break;
    case PALN:  h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALN;     break;
    case PALM:  h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALM;     break;
    case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM;    break;
    case NTSC:  h_max = NTSC_HEIGHT;  c = BT848_IFORM_F_NTSCM;    break;
    case NTSCJ: h_max = NTSC_HEIGHT;  c = BT848_IFORM_F_NTSCJ;    break;
    default:    h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALBDGHI; break;
    }

    if (height <= h_max / 2)
        geo.oformat |= METEOR_GEO_EVEN_ONLY;

    if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
        av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno));
        return -1;
    }

    if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
        av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno));
        return -1;
    }

    c = bktr_dev[idev];
    if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
        av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno));
        return -1;
    }

    video_buf_size = width * height * 12 / 8;

    video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
        PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
    if (video_buf == MAP_FAILED) {
        av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
        return -1;
    }

    if (frequency != 0.0) {
        ioctl_frequency  = (unsigned long)(frequency*16);
        if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
            av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
    }

    c = AUDIO_UNMUTE;
    if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
        av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));

    c = METEOR_CAP_CONTINOUS;
    ioctl(*video_fd, METEORCAPTUR, &c);

    c = SIGUSR1;
    ioctl(*video_fd, METEORSSIGNAL, &c);

    return 0;
}

static void bktr_getframe(uint64_t per_frame)
{
    uint64_t curtime;

    curtime = av_gettime();
    if (!last_frame_time
        || ((last_frame_time + per_frame) > curtime)) {
        if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
            if (!nsignals)
                av_log(NULL, AV_LOG_INFO,
                       "SLEPT NO signals - %d microseconds late\n",
                       (int)(av_gettime() - last_frame_time - per_frame));
        }
    }
    nsignals = 0;
    last_frame_time = curtime;
}


/* note: we support only one picture read at a time */
static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
{
    VideoData *s = s1->priv_data;

    if (av_new_packet(pkt, video_buf_size) < 0)
        return AVERROR(EIO);

    bktr_getframe(s->per_frame);

    pkt->pts = av_gettime();
    memcpy(pkt->data, video_buf, video_buf_size);

    return video_buf_size;
}

static int grab_read_header(AVFormatContext *s1)
{
    VideoData *s = s1->priv_data;
    AVStream *st;
    AVRational framerate;
    int ret = 0;

    if (!s->framerate)
        switch (s->standard) {
        case PAL:   s->framerate = av_strdup("pal");  break;
        case NTSC:  s->framerate = av_strdup("ntsc"); break;
        case SECAM: s->framerate = av_strdup("25");   break;
        default:
            av_log(s1, AV_LOG_ERROR, "Unknown standard.\n");
            ret = AVERROR(EINVAL);
            goto out;
        }
    if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
        av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate);
        goto out;
    }

    st = avformat_new_stream(s1, NULL);
    if (!st) {
        ret = AVERROR(ENOMEM);
        goto out;
    }
    avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */

    s->per_frame = ((uint64_t)1000000 * framerate.den) / framerate.num;

    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codec->pix_fmt = AV_PIX_FMT_YUV420P;
    st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
    st->codec->width = s->width;
    st->codec->height = s->height;
    st->codec->time_base.den = framerate.num;
    st->codec->time_base.num = framerate.den;


    if (bktr_init(s1->filename, s->width, s->height, s->standard,
                  &s->video_fd, &s->tuner_fd, -1, 0.0) < 0) {
        ret = AVERROR(EIO);
        goto out;
    }

    nsignals = 0;
    last_frame_time = 0;

out:
    return ret;
}

static int grab_read_close(AVFormatContext *s1)
{
    VideoData *s = s1->priv_data;
    int c;

    c = METEOR_CAP_STOP_CONT;
    ioctl(s->video_fd, METEORCAPTUR, &c);
    close(s->video_fd);

    c = AUDIO_MUTE;
    ioctl(s->tuner_fd, BT848_SAUDIO, &c);
    close(s->tuner_fd);

    munmap((caddr_t)video_buf, video_buf_size);

    return 0;
}

#define OFFSET(x) offsetof(VideoData, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static const AVOption options[] = {
    { "standard", "", offsetof(VideoData, standard), AV_OPT_TYPE_INT, {.i64 = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "PAL",      "", 0, AV_OPT_TYPE_CONST, {.i64 = PAL},   0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "NTSC",     "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSC},  0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "SECAM",    "", 0, AV_OPT_TYPE_CONST, {.i64 = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "PALN",     "", 0, AV_OPT_TYPE_CONST, {.i64 = PALN},  0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "PALM",     "", 0, AV_OPT_TYPE_CONST, {.i64 = PALM},  0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "NTSCJ",    "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
    { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC },
    { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
    { NULL },
};

static const AVClass bktr_class = {
    .class_name = "BKTR grab interface",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
    .category   = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
};

AVInputFormat ff_bktr_demuxer = {
    .name           = "bktr",
    .long_name      = NULL_IF_CONFIG_SMALL("video grab"),
    .priv_data_size = sizeof(VideoData),
    .read_header    = grab_read_header,
    .read_packet    = grab_read_packet,
    .read_close     = grab_read_close,
    .flags          = AVFMT_NOFILE,
    .priv_class     = &bktr_class,
};
Commit	Line	Data
2ba45a60 DM	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 Fabrice Bellard
	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	#include "libavformat/internal.h"
	28	#include "libavutil/internal.h"
	29	#include "libavutil/log.h"
	30	#include "libavutil/opt.h"
	31	#include "libavutil/parseutils.h"
	32	#include "libavutil/time.h"
	33	#if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
	34	# include <dev/bktr/ioctl_meteor.h>
	35	# include <dev/bktr/ioctl_bt848.h>
	36	#elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
	37	# include <machine/ioctl_meteor.h>
	38	# include <machine/ioctl_bt848.h>
	39	#elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
	40	# include <dev/video/meteor/ioctl_meteor.h>
	41	# include <dev/video/bktr/ioctl_bt848.h>
	42	#elif HAVE_DEV_IC_BT8XX_H
	43	# include <dev/ic/bt8xx.h>
	44	#endif
	45	#include <unistd.h>
	46	#include <fcntl.h>
	47	#include <sys/ioctl.h>
	48	#include <sys/mman.h>
	49	#include <sys/time.h>
	50	#include <signal.h>
	51	#include <stdint.h>
	52	#include "avdevice.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 framerate; /< Set by a private option. /
	62	} VideoData;
	63
	64
65	#define PAL 1
66	#define PALBDGHI 1
67	#define NTSC 2
68	#define NTSCM 2
69	#define SECAM 3
70	#define PALN 4
71	#define PALM 5
72	#define NTSCJ 6
73
74	/* PAL is 768 x 576. NTSC is 640 x 480 */
75	#define PAL_HEIGHT 576
76	#define SECAM_HEIGHT 576
77	#define NTSC_HEIGHT 480
78
79	#ifndef VIDEO_FORMAT
80	#define VIDEO_FORMAT NTSC
81	#endif
82
83	static const int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
84	METEOR_DEV3, METEOR_DEV_SVIDEO };
85
86	uint8_t *video_buf;
87	size_t video_buf_size;
88	uint64_t last_frame_time;
89	volatile sig_atomic_t nsignals;
90
91
92	static void catchsignal(int signal)
93	{
94	nsignals++;
95	return;
96	}
97
98	static av_cold int bktr_init(const char *video_device, int width, int height,
99	int format, int video_fd, int tuner_fd, int idev, double frequency)
100	{
101	struct meteor_geomet geo;
102	int h_max;
103	long ioctl_frequency;
104	char *arg;
105	int c;
106	struct sigaction act = { {0} }, old;
107
108	if (idev < 0 \|\| idev > 4)
109	{
110	arg = getenv ("BKTR_DEV");
111	if (arg)
112	idev = atoi (arg);
113	if (idev < 0 \|\| idev > 4)
114	idev = 1;
115	}
116
117	if (format < 1 \|\| format > 6)
118	{
119	arg = getenv ("BKTR_FORMAT");
120	if (arg)
121	format = atoi (arg);
122	if (format < 1 \|\| format > 6)
123	format = VIDEO_FORMAT;
124	}
125
126	if (frequency <= 0)
127	{
128	arg = getenv ("BKTR_FREQUENCY");
129	if (arg)
130	frequency = atof (arg);
131	if (frequency <= 0)
132	frequency = 0.0;
133	}
134
135	sigemptyset(&act.sa_mask);
136	act.sa_handler = catchsignal;
137	sigaction(SIGUSR1, &act, &old);
138
139	*tuner_fd = avpriv_open("/dev/tuner0", O_RDONLY);
140	if (*tuner_fd < 0)
141	av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
142
143	*video_fd = avpriv_open(video_device, O_RDONLY);
144	if (*video_fd < 0) {
145	av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno));
146	return -1;
147	}
148
149	geo.rows = height;
150	geo.columns = width;
151	geo.frames = 1;
152	geo.oformat = METEOR_GEO_YUV_422 \| METEOR_GEO_YUV_12;
153
154	switch (format) {
155	case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
156	case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
157	case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
158	case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
159	case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
160	case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
161	default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
162	}
163
164	if (height <= h_max / 2)
165	geo.oformat \|= METEOR_GEO_EVEN_ONLY;
166
167	if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
168	av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno));
169	return -1;
170	}
171
172	if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
173	av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno));
174	return -1;
175	}
176
177	c = bktr_dev[idev];
178	if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
179	av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno));
180	return -1;
181	}
182
183	video_buf_size = width * height * 12 / 8;
184
185	video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
186	PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
187	if (video_buf == MAP_FAILED) {
188	av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
189	return -1;
190	}
191
192	if (frequency != 0.0) {
193	ioctl_frequency = (unsigned long)(frequency*16);
194	if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
195	av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
196	}
197
198	c = AUDIO_UNMUTE;
199	if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
200	av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
201
202	c = METEOR_CAP_CONTINOUS;
203	ioctl(*video_fd, METEORCAPTUR, &c);
204
205	c = SIGUSR1;
206	ioctl(*video_fd, METEORSSIGNAL, &c);
207
208	return 0;
209	}
210
211	static void bktr_getframe(uint64_t per_frame)
212	{
213	uint64_t curtime;
214
215	curtime = av_gettime();
216	if (!last_frame_time
217	\|\| ((last_frame_time + per_frame) > curtime)) {
218	if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
219	if (!nsignals)
220	av_log(NULL, AV_LOG_INFO,
221	"SLEPT NO signals - %d microseconds late\n",
222	(int)(av_gettime() - last_frame_time - per_frame));
223	}
224	}
225	nsignals = 0;
226	last_frame_time = curtime;
227	}
228
229
230	/* note: we support only one picture read at a time */
231	static int grab_read_packet(AVFormatContext s1, AVPacket pkt)
232	{
233	VideoData *s = s1->priv_data;
234
235	if (av_new_packet(pkt, video_buf_size) < 0)
236	return AVERROR(EIO);
237
238	bktr_getframe(s->per_frame);
239
240	pkt->pts = av_gettime();
241	memcpy(pkt->data, video_buf, video_buf_size);
242
243	return video_buf_size;
244	}
245
246	static int grab_read_header(AVFormatContext *s1)
247	{
248	VideoData *s = s1->priv_data;
249	AVStream *st;
250	AVRational framerate;
251	int ret = 0;
252
253	if (!s->framerate)
254	switch (s->standard) {
255	case PAL: s->framerate = av_strdup("pal"); break;
256	case NTSC: s->framerate = av_strdup("ntsc"); break;
257	case SECAM: s->framerate = av_strdup("25"); break;
258	default:
259	av_log(s1, AV_LOG_ERROR, "Unknown standard.\n");
260	ret = AVERROR(EINVAL);
261	goto out;
262	}
263	if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
264	av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate);
265	goto out;
266	}
267
268	st = avformat_new_stream(s1, NULL);
269	if (!st) {
270	ret = AVERROR(ENOMEM);
271	goto out;
272	}
273	avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
274
275	s->per_frame = ((uint64_t)1000000 * framerate.den) / framerate.num;
276
277	st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
278	st->codec->pix_fmt = AV_PIX_FMT_YUV420P;
279	st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
280	st->codec->width = s->width;
281	st->codec->height = s->height;
282	st->codec->time_base.den = framerate.num;
283	st->codec->time_base.num = framerate.den;
284
285
286	if (bktr_init(s1->filename, s->width, s->height, s->standard,
287	&s->video_fd, &s->tuner_fd, -1, 0.0) < 0) {
288	ret = AVERROR(EIO);
289	goto out;
290	}
291
292	nsignals = 0;
293	last_frame_time = 0;
294
295	out:
296	return ret;
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	#define OFFSET(x) offsetof(VideoData, x)
318	#define DEC AV_OPT_FLAG_DECODING_PARAM
319	static const AVOption options[] = {
320	{ "standard", "", offsetof(VideoData, standard), AV_OPT_TYPE_INT, {.i64 = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
321	{ "PAL", "", 0, AV_OPT_TYPE_CONST, {.i64 = PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
322	{ "NTSC", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
323	{ "SECAM", "", 0, AV_OPT_TYPE_CONST, {.i64 = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
324	{ "PALN", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALN}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
325	{ "PALM", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
326	{ "NTSCJ", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
327	{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC },
328	{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
329	{ NULL },
330	};
331
332	static const AVClass bktr_class = {
333	.class_name = "BKTR grab interface",
334	.item_name = av_default_item_name,
335	.option = options,
336	.version = LIBAVUTIL_VERSION_INT,
337	.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
338	};
339
340	AVInputFormat ff_bktr_demuxer = {
341	.name = "bktr",
342	.long_name = NULL_IF_CONFIG_SMALL("video grab"),
343	.priv_data_size = sizeof(VideoData),
344	.read_header = grab_read_header,
345	.read_packet = grab_read_packet,
346	.read_close = grab_read_close,
347	.flags = AVFMT_NOFILE,
348	.priv_class = &bktr_class,
349	};