diff options
Diffstat (limited to 'ffmpeg/libavdevice/bktr.c')
| -rw-r--r-- | ffmpeg/libavdevice/bktr.c | 347 |
1 files changed, 347 insertions, 0 deletions
diff --git a/ffmpeg/libavdevice/bktr.c b/ffmpeg/libavdevice/bktr.c new file mode 100644 index 0000000..b0dbe60 --- /dev/null +++ b/ffmpeg/libavdevice/bktr.c @@ -0,0 +1,347 @@ +/* + * *BSD video grab interface + * Copyright (c) 2002 Steve O'Hara-Smith + * based on + * Linux video grab interface + * Copyright (c) 2000,2001 Gerard Lantau + * 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/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 { + 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 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 = 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 = 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, +}; + +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, +}; |