yading@10: /*
yading@10:  * *BSD video grab interface
yading@10:  * Copyright (c) 2002 Steve O'Hara-Smith
yading@10:  * based on
yading@10:  *           Linux video grab interface
yading@10:  *           Copyright (c) 2000,2001 Gerard Lantau
yading@10:  * and
yading@10:  *           simple_grab.c Copyright (c) 1999 Roger Hardiman
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "libavformat/internal.h"
yading@10: #include "libavutil/log.h"
yading@10: #include "libavutil/opt.h"
yading@10: #include "libavutil/parseutils.h"
yading@10: #include "libavutil/time.h"
yading@10: #if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
yading@10: # include <dev/bktr/ioctl_meteor.h>
yading@10: # include <dev/bktr/ioctl_bt848.h>
yading@10: #elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
yading@10: # include <machine/ioctl_meteor.h>
yading@10: # include <machine/ioctl_bt848.h>
yading@10: #elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
yading@10: # include <dev/video/meteor/ioctl_meteor.h>
yading@10: # include <dev/video/bktr/ioctl_bt848.h>
yading@10: #elif HAVE_DEV_IC_BT8XX_H
yading@10: # include <dev/ic/bt8xx.h>
yading@10: #endif
yading@10: #include <unistd.h>
yading@10: #include <fcntl.h>
yading@10: #include <sys/ioctl.h>
yading@10: #include <sys/mman.h>
yading@10: #include <sys/time.h>
yading@10: #include <signal.h>
yading@10: #include <stdint.h>
yading@10: #include "avdevice.h"
yading@10: 
yading@10: typedef struct {
yading@10:     AVClass *class;
yading@10:     int video_fd;
yading@10:     int tuner_fd;
yading@10:     int width, height;
yading@10:     uint64_t per_frame;
yading@10:     int standard;
yading@10:     char *framerate;  /**< Set by a private option. */
yading@10: } VideoData;
yading@10: 
yading@10: 
yading@10: #define PAL 1
yading@10: #define PALBDGHI 1
yading@10: #define NTSC 2
yading@10: #define NTSCM 2
yading@10: #define SECAM 3
yading@10: #define PALN 4
yading@10: #define PALM 5
yading@10: #define NTSCJ 6
yading@10: 
yading@10: /* PAL is 768 x 576. NTSC is 640 x 480 */
yading@10: #define PAL_HEIGHT 576
yading@10: #define SECAM_HEIGHT 576
yading@10: #define NTSC_HEIGHT 480
yading@10: 
yading@10: #ifndef VIDEO_FORMAT
yading@10: #define VIDEO_FORMAT NTSC
yading@10: #endif
yading@10: 
yading@10: static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
yading@10:     METEOR_DEV3, METEOR_DEV_SVIDEO };
yading@10: 
yading@10: uint8_t *video_buf;
yading@10: size_t video_buf_size;
yading@10: uint64_t last_frame_time;
yading@10: volatile sig_atomic_t nsignals;
yading@10: 
yading@10: 
yading@10: static void catchsignal(int signal)
yading@10: {
yading@10:     nsignals++;
yading@10:     return;
yading@10: }
yading@10: 
yading@10: static av_cold int bktr_init(const char *video_device, int width, int height,
yading@10:     int format, int *video_fd, int *tuner_fd, int idev, double frequency)
yading@10: {
yading@10:     struct meteor_geomet geo;
yading@10:     int h_max;
yading@10:     long ioctl_frequency;
yading@10:     char *arg;
yading@10:     int c;
yading@10:     struct sigaction act = { {0} }, old;
yading@10: 
yading@10:     if (idev < 0 || idev > 4)
yading@10:     {
yading@10:         arg = getenv ("BKTR_DEV");
yading@10:         if (arg)
yading@10:             idev = atoi (arg);
yading@10:         if (idev < 0 || idev > 4)
yading@10:             idev = 1;
yading@10:     }
yading@10: 
yading@10:     if (format < 1 || format > 6)
yading@10:     {
yading@10:         arg = getenv ("BKTR_FORMAT");
yading@10:         if (arg)
yading@10:             format = atoi (arg);
yading@10:         if (format < 1 || format > 6)
yading@10:             format = VIDEO_FORMAT;
yading@10:     }
yading@10: 
yading@10:     if (frequency <= 0)
yading@10:     {
yading@10:         arg = getenv ("BKTR_FREQUENCY");
yading@10:         if (arg)
yading@10:             frequency = atof (arg);
yading@10:         if (frequency <= 0)
yading@10:             frequency = 0.0;
yading@10:     }
yading@10: 
yading@10:     sigemptyset(&act.sa_mask);
yading@10:     act.sa_handler = catchsignal;
yading@10:     sigaction(SIGUSR1, &act, &old);
yading@10: 
yading@10:     *tuner_fd = open("/dev/tuner0", O_RDONLY);
yading@10:     if (*tuner_fd < 0)
yading@10:         av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
yading@10: 
yading@10:     *video_fd = open(video_device, O_RDONLY);
yading@10:     if (*video_fd < 0) {
yading@10:         av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno));
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     geo.rows = height;
yading@10:     geo.columns = width;
yading@10:     geo.frames = 1;
yading@10:     geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
yading@10: 
yading@10:     switch (format) {
yading@10:     case PAL:   h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALBDGHI; break;
yading@10:     case PALN:  h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALN;     break;
yading@10:     case PALM:  h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALM;     break;
yading@10:     case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM;    break;
yading@10:     case NTSC:  h_max = NTSC_HEIGHT;  c = BT848_IFORM_F_NTSCM;    break;
yading@10:     case NTSCJ: h_max = NTSC_HEIGHT;  c = BT848_IFORM_F_NTSCJ;    break;
yading@10:     default:    h_max = PAL_HEIGHT;   c = BT848_IFORM_F_PALBDGHI; break;
yading@10:     }
yading@10: 
yading@10:     if (height <= h_max / 2)
yading@10:         geo.oformat |= METEOR_GEO_EVEN_ONLY;
yading@10: 
yading@10:     if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
yading@10:         av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno));
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
yading@10:         av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno));
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     c = bktr_dev[idev];
yading@10:     if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
yading@10:         av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno));
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     video_buf_size = width * height * 12 / 8;
yading@10: 
yading@10:     video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
yading@10:         PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
yading@10:     if (video_buf == MAP_FAILED) {
yading@10:         av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
yading@10:         return -1;
yading@10:     }
yading@10: 
yading@10:     if (frequency != 0.0) {
yading@10:         ioctl_frequency  = (unsigned long)(frequency*16);
yading@10:         if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
yading@10:             av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
yading@10:     }
yading@10: 
yading@10:     c = AUDIO_UNMUTE;
yading@10:     if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
yading@10:         av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
yading@10: 
yading@10:     c = METEOR_CAP_CONTINOUS;
yading@10:     ioctl(*video_fd, METEORCAPTUR, &c);
yading@10: 
yading@10:     c = SIGUSR1;
yading@10:     ioctl(*video_fd, METEORSSIGNAL, &c);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static void bktr_getframe(uint64_t per_frame)
yading@10: {
yading@10:     uint64_t curtime;
yading@10: 
yading@10:     curtime = av_gettime();
yading@10:     if (!last_frame_time
yading@10:         || ((last_frame_time + per_frame) > curtime)) {
yading@10:         if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
yading@10:             if (!nsignals)
yading@10:                 av_log(NULL, AV_LOG_INFO,
yading@10:                        "SLEPT NO signals - %d microseconds late\n",
yading@10:                        (int)(av_gettime() - last_frame_time - per_frame));
yading@10:         }
yading@10:     }
yading@10:     nsignals = 0;
yading@10:     last_frame_time = curtime;
yading@10: }
yading@10: 
yading@10: 
yading@10: /* note: we support only one picture read at a time */
yading@10: static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
yading@10: {
yading@10:     VideoData *s = s1->priv_data;
yading@10: 
yading@10:     if (av_new_packet(pkt, video_buf_size) < 0)
yading@10:         return AVERROR(EIO);
yading@10: 
yading@10:     bktr_getframe(s->per_frame);
yading@10: 
yading@10:     pkt->pts = av_gettime();
yading@10:     memcpy(pkt->data, video_buf, video_buf_size);
yading@10: 
yading@10:     return video_buf_size;
yading@10: }
yading@10: 
yading@10: static int grab_read_header(AVFormatContext *s1)
yading@10: {
yading@10:     VideoData *s = s1->priv_data;
yading@10:     AVStream *st;
yading@10:     AVRational framerate;
yading@10:     int ret = 0;
yading@10: 
yading@10:     if (!s->framerate)
yading@10:         switch (s->standard) {
yading@10:         case PAL:   s->framerate = av_strdup("pal");  break;
yading@10:         case NTSC:  s->framerate = av_strdup("ntsc"); break;
yading@10:         case SECAM: s->framerate = av_strdup("25");   break;
yading@10:         default:
yading@10:             av_log(s1, AV_LOG_ERROR, "Unknown standard.\n");
yading@10:             ret = AVERROR(EINVAL);
yading@10:             goto out;
yading@10:         }
yading@10:     if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
yading@10:         av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate);
yading@10:         goto out;
yading@10:     }
yading@10: 
yading@10:     st = avformat_new_stream(s1, NULL);
yading@10:     if (!st) {
yading@10:         ret = AVERROR(ENOMEM);
yading@10:         goto out;
yading@10:     }
yading@10:     avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
yading@10: 
yading@10:     s->per_frame = ((uint64_t)1000000 * framerate.den) / framerate.num;
yading@10: 
yading@10:     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
yading@10:     st->codec->pix_fmt = AV_PIX_FMT_YUV420P;
yading@10:     st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
yading@10:     st->codec->width = s->width;
yading@10:     st->codec->height = s->height;
yading@10:     st->codec->time_base.den = framerate.num;
yading@10:     st->codec->time_base.num = framerate.den;
yading@10: 
yading@10: 
yading@10:     if (bktr_init(s1->filename, s->width, s->height, s->standard,
yading@10:                   &s->video_fd, &s->tuner_fd, -1, 0.0) < 0) {
yading@10:         ret = AVERROR(EIO);
yading@10:         goto out;
yading@10:     }
yading@10: 
yading@10:     nsignals = 0;
yading@10:     last_frame_time = 0;
yading@10: 
yading@10: out:
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: static int grab_read_close(AVFormatContext *s1)
yading@10: {
yading@10:     VideoData *s = s1->priv_data;
yading@10:     int c;
yading@10: 
yading@10:     c = METEOR_CAP_STOP_CONT;
yading@10:     ioctl(s->video_fd, METEORCAPTUR, &c);
yading@10:     close(s->video_fd);
yading@10: 
yading@10:     c = AUDIO_MUTE;
yading@10:     ioctl(s->tuner_fd, BT848_SAUDIO, &c);
yading@10:     close(s->tuner_fd);
yading@10: 
yading@10:     munmap((caddr_t)video_buf, video_buf_size);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: #define OFFSET(x) offsetof(VideoData, x)
yading@10: #define DEC AV_OPT_FLAG_DECODING_PARAM
yading@10: static const AVOption options[] = {
yading@10:     { "standard", "", offsetof(VideoData, standard), AV_OPT_TYPE_INT, {.i64 = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
yading@10:     { "PAL",      "", 0, AV_OPT_TYPE_CONST, {.i64 = PAL},   0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
yading@10:     { "NTSC",     "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSC},  0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
yading@10:     { "SECAM",    "", 0, AV_OPT_TYPE_CONST, {.i64 = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
yading@10:     { "PALN",     "", 0, AV_OPT_TYPE_CONST, {.i64 = PALN},  0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
yading@10:     { "PALM",     "", 0, AV_OPT_TYPE_CONST, {.i64 = PALM},  0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
yading@10:     { "NTSCJ",    "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
yading@10:     { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC },
yading@10:     { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
yading@10:     { NULL },
yading@10: };
yading@10: 
yading@10: static const AVClass bktr_class = {
yading@10:     .class_name = "BKTR grab interface",
yading@10:     .item_name  = av_default_item_name,
yading@10:     .option     = options,
yading@10:     .version    = LIBAVUTIL_VERSION_INT,
yading@10: };
yading@10: 
yading@10: AVInputFormat ff_bktr_demuxer = {
yading@10:     .name           = "bktr",
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("video grab"),
yading@10:     .priv_data_size = sizeof(VideoData),
yading@10:     .read_header    = grab_read_header,
yading@10:     .read_packet    = grab_read_packet,
yading@10:     .read_close     = grab_read_close,
yading@10:     .flags          = AVFMT_NOFILE,
yading@10:     .priv_class     = &bktr_class,
yading@10: };