/* * *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, };