mirror of
https://git.videolan.org/git/ffmpeg.git
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357 lines
10 KiB
C
357 lines
10 KiB
C
/*
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* *BSD video grab interface
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* Copyright (c) 2002 Steve O'Hara-Smith
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* based on
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* Linux video grab interface
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* Copyright (c) 2000,2001 Gerard Lantau
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* and
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* simple_grab.c Copyright (c) 1999 Roger Hardiman
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavformat/avformat.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
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# include <dev/bktr/ioctl_meteor.h>
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# include <dev/bktr/ioctl_bt848.h>
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#elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
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# include <machine/ioctl_meteor.h>
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# include <machine/ioctl_bt848.h>
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#elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
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# include <dev/video/meteor/ioctl_meteor.h>
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# include <dev/video/bktr/ioctl_bt848.h>
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#elif HAVE_DEV_IC_BT8XX_H
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# include <dev/ic/bt8xx.h>
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#endif
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/time.h>
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#include <signal.h>
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#include <stdint.h>
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#include <strings.h>
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typedef struct {
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AVClass *class;
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int video_fd;
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int tuner_fd;
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int width, height;
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uint64_t per_frame;
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int standard;
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char *video_size; /**< String describing video size, set by a private option. */
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char *framerate; /**< Set by a private option. */
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} VideoData;
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#define PAL 1
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#define PALBDGHI 1
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#define NTSC 2
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#define NTSCM 2
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#define SECAM 3
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#define PALN 4
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#define PALM 5
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#define NTSCJ 6
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/* PAL is 768 x 576. NTSC is 640 x 480 */
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#define PAL_HEIGHT 576
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#define SECAM_HEIGHT 576
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#define NTSC_HEIGHT 480
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#ifndef VIDEO_FORMAT
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#define VIDEO_FORMAT NTSC
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#endif
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static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
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METEOR_DEV3, METEOR_DEV_SVIDEO };
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uint8_t *video_buf;
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size_t video_buf_size;
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uint64_t last_frame_time;
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volatile sig_atomic_t nsignals;
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static void catchsignal(int signal)
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{
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nsignals++;
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return;
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}
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static av_cold int bktr_init(const char *video_device, int width, int height,
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int format, int *video_fd, int *tuner_fd, int idev, double frequency)
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{
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struct meteor_geomet geo;
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int h_max;
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long ioctl_frequency;
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char *arg;
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int c;
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struct sigaction act, old;
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if (idev < 0 || idev > 4)
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{
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arg = getenv ("BKTR_DEV");
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if (arg)
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idev = atoi (arg);
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if (idev < 0 || idev > 4)
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idev = 1;
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}
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if (format < 1 || format > 6)
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{
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arg = getenv ("BKTR_FORMAT");
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if (arg)
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format = atoi (arg);
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if (format < 1 || format > 6)
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format = VIDEO_FORMAT;
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}
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if (frequency <= 0)
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{
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arg = getenv ("BKTR_FREQUENCY");
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if (arg)
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frequency = atof (arg);
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if (frequency <= 0)
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frequency = 0.0;
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}
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memset(&act, 0, sizeof(act));
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sigemptyset(&act.sa_mask);
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act.sa_handler = catchsignal;
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sigaction(SIGUSR1, &act, &old);
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*tuner_fd = open("/dev/tuner0", O_RDONLY);
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if (*tuner_fd < 0)
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av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
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*video_fd = open(video_device, O_RDONLY);
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if (*video_fd < 0) {
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av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno));
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return -1;
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}
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geo.rows = height;
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geo.columns = width;
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geo.frames = 1;
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geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
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switch (format) {
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case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
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case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
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case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
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case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
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case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
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case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
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default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
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}
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if (height <= h_max / 2)
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geo.oformat |= METEOR_GEO_EVEN_ONLY;
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if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
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av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno));
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return -1;
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}
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if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
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av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno));
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return -1;
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}
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c = bktr_dev[idev];
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if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
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av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno));
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return -1;
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}
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video_buf_size = width * height * 12 / 8;
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video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
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PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
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if (video_buf == MAP_FAILED) {
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av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
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return -1;
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}
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if (frequency != 0.0) {
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ioctl_frequency = (unsigned long)(frequency*16);
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if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
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av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
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}
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c = AUDIO_UNMUTE;
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if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
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av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
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c = METEOR_CAP_CONTINOUS;
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ioctl(*video_fd, METEORCAPTUR, &c);
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c = SIGUSR1;
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ioctl(*video_fd, METEORSSIGNAL, &c);
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return 0;
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}
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static void bktr_getframe(uint64_t per_frame)
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{
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uint64_t curtime;
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curtime = av_gettime();
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if (!last_frame_time
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|| ((last_frame_time + per_frame) > curtime)) {
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if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
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if (!nsignals)
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av_log(NULL, AV_LOG_INFO,
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"SLEPT NO signals - %d microseconds late\n",
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(int)(av_gettime() - last_frame_time - per_frame));
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}
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}
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nsignals = 0;
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last_frame_time = curtime;
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}
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/* note: we support only one picture read at a time */
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static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
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{
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VideoData *s = s1->priv_data;
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if (av_new_packet(pkt, video_buf_size) < 0)
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return AVERROR(EIO);
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bktr_getframe(s->per_frame);
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pkt->pts = av_gettime();
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memcpy(pkt->data, video_buf, video_buf_size);
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return video_buf_size;
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}
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static int grab_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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{
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VideoData *s = s1->priv_data;
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AVStream *st;
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int width, height;
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AVRational framerate;
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int ret = 0;
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if ((ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
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av_log(s1, AV_LOG_ERROR, "Could not parse video size '%s'.\n", s->video_size);
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goto out;
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}
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if (!s->framerate)
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switch (s->standard) {
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case PAL: s->framerate = av_strdup("pal"); break;
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case NTSC: s->framerate = av_strdup("ntsc"); break;
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case SECAM: s->framerate = av_strdup("25"); break;
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default:
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av_log(s1, AV_LOG_ERROR, "Unknown standard.\n");
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ret = AVERROR(EINVAL);
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goto out;
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}
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if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
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av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate);
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goto out;
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}
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st = av_new_stream(s1, 0);
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if (!st) {
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ret = AVERROR(ENOMEM);
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goto out;
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}
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av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
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s->width = width;
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s->height = height;
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s->per_frame = ((uint64_t)1000000 * framerate.den) / framerate.num;
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codec->pix_fmt = PIX_FMT_YUV420P;
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st->codec->codec_id = CODEC_ID_RAWVIDEO;
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st->codec->width = width;
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st->codec->height = height;
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st->codec->time_base.den = framerate.num;
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st->codec->time_base.num = framerate.den;
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if (bktr_init(s1->filename, width, height, s->standard,
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&(s->video_fd), &(s->tuner_fd), -1, 0.0) < 0) {
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ret = AVERROR(EIO);
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goto out;
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}
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nsignals = 0;
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last_frame_time = 0;
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out:
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return ret;
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}
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static int grab_read_close(AVFormatContext *s1)
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{
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VideoData *s = s1->priv_data;
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int c;
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c = METEOR_CAP_STOP_CONT;
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ioctl(s->video_fd, METEORCAPTUR, &c);
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close(s->video_fd);
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c = AUDIO_MUTE;
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ioctl(s->tuner_fd, BT848_SAUDIO, &c);
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close(s->tuner_fd);
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munmap((caddr_t)video_buf, video_buf_size);
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return 0;
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}
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#define OFFSET(x) offsetof(VideoData, x)
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#define DEC AV_OPT_FLAG_DECODING_PARAM
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static const AVOption options[] = {
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{ "standard", "", offsetof(VideoData, standard), AV_OPT_TYPE_INT, {.dbl = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
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{ "PAL", "", 0, AV_OPT_TYPE_CONST, {.dbl = PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
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{ "NTSC", "", 0, AV_OPT_TYPE_CONST, {.dbl = NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
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{ "SECAM", "", 0, AV_OPT_TYPE_CONST, {.dbl = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
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{ "PALN", "", 0, AV_OPT_TYPE_CONST, {.dbl = PALN}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
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{ "PALM", "", 0, AV_OPT_TYPE_CONST, {.dbl = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
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{ "NTSCJ", "", 0, AV_OPT_TYPE_CONST, {.dbl = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
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{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC },
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{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
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{ NULL },
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};
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static const AVClass bktr_class = {
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.class_name = "BKTR grab interface",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVInputFormat ff_bktr_demuxer = {
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.name = "bktr",
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.long_name = NULL_IF_CONFIG_SMALL("video grab"),
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.priv_data_size = sizeof(VideoData),
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.read_header = grab_read_header,
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.read_packet = grab_read_packet,
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.read_close = grab_read_close,
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.flags = AVFMT_NOFILE,
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.priv_class = &bktr_class,
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};
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