diff options
Diffstat (limited to 'multimedia/ffmpeg/files/grab_bsdbktr.c')
| -rw-r--r-- | multimedia/ffmpeg/files/grab_bsdbktr.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/multimedia/ffmpeg/files/grab_bsdbktr.c b/multimedia/ffmpeg/files/grab_bsdbktr.c new file mode 100644 index 0000000..6f171ea --- /dev/null +++ b/multimedia/ffmpeg/files/grab_bsdbktr.c @@ -0,0 +1,248 @@ +/* + * FreeBSD 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 + * + * GPL virus inherited: + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include "avformat.h" +#include <machine/ioctl_meteor.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <sys/time.h> +#include <signal.h> + +typedef struct { + int fd; + int tuner_fd; + int frame_format; /* see VIDEO_PALETTE_xxx */ + int width, height; + int frame_rate; + int frame_size; +} VideoData; + +const char *video_device = "/dev/bktr0"; + +#define GRABBER_SETTLE_TIME 3 +#define PAL 1 +#define NTSC 2 +/* PAL is 768 x 576. NTSC is 640 x 480 */ +#define PAL_HEIGHT 576 +#define NTSC_HEIGHT 480 + +#ifndef VIDEO_FORMAT +#define VIDEO_FORMAT NTSC +#endif + +#ifndef VIDEO_INPUT +#define VIDEO_INPUT METEOR_INPUT_DEV0; +#endif + +static UINT8 *video_buf; + +static void catchsignal(int signal) +{ + return; +} + +static int bktr_init(AVFormatContext *s1, AVFormatParameters *ap) +{ + VideoData *s = s1->priv_data; + int width, height; + int video_fd; + int format = VIDEO_FORMAT; + struct meteor_geomet geo; + int c; + struct sigaction act,old; + + memset(&act,0,sizeof(act)); + sigemptyset(&act.sa_mask); + act.sa_handler = catchsignal; + sigaction(SIGUSR1,&act,&old); + sigaction(SIGALRM,&act,&old); + + width = s->width; + height = s->height; + + s->tuner_fd = open ("/dev/tuner0", O_RDWR); + + video_fd = open(video_device, O_RDWR); + if (video_fd < 0) { + perror(video_device); + return -EIO; + } + s->fd=video_fd; + geo.rows = height; + geo.columns = width; + geo.frames = 1; + geo.oformat = METEOR_GEO_YUV_PACKED; // RGB + if ((format == PAL) && (height <= (PAL_HEIGHT/2))) + geo.oformat |= METEOR_GEO_ODD_ONLY; + if ((format == NTSC) && (height <= (NTSC_HEIGHT/2))) + geo.oformat |= METEOR_GEO_ODD_ONLY; + + if (ioctl(video_fd, METEORSETGEO, &geo) < 0) { + perror ("METEORSETGEO"); + return -EIO; + } + + switch (format) { + case PAL: c = METEOR_FMT_PAL; break; + case NTSC: c = METEOR_FMT_NTSC; break; + default: c = METEOR_FMT_PAL; break; + } + + if (ioctl(video_fd, METEORSFMT, &c) < 0) { + perror ("METEORSFMT"); + return -EIO; + } + + c = VIDEO_INPUT; + if (ioctl(video_fd, METEORSINPUT, &c) < 0) { + perror ("METEORSINPUT"); + return -EIO; + } + video_buf = mmap((caddr_t)0, width*height*2, PROT_READ, MAP_SHARED, // RGB + video_fd, (off_t) 0); + if (video_buf == MAP_FAILED) { + perror ("mmap"); + return -EIO; + } + c = METEOR_CAP_CONTINOUS; + ioctl(s->fd, METEORCAPTUR, &c); + c = SIGUSR1; + ioctl (s->fd, METEORSSIGNAL, &c); + return 0; +} + +static void bf_yuv422_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr, + UINT8 *src, int width, int height) +{ + int x, y; + UINT8 *p = src; + for(y=0;y<height;y+=2) { + for(x=0;x<width;x+=2) { + lum[0] = p[1]; + cb[0] = p[0]; + lum[1] = p[3]; + cr[0] = p[2]; + p += 4; + lum += 2; + cb++; + cr++; + } + for(x=0;x<width;x+=2) { + lum[0] = p[1]; + lum[1] = p[3]; + p += 4; + lum += 2; + } + } +} + +/* note: we support only one picture read at a time */ +static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt) +{ + VideoData *s = s1->priv_data; + int size, halfsize; + sigset_t msig; + UINT8 *lum, *cb, *cr; + + size = s->width * s->height; + halfsize = size << 1; + if (av_new_packet(pkt, size + halfsize) < 0) + return -EIO; + + sigemptyset (&msig); + sigsuspend (&msig); + + lum = pkt->data; + cb = lum + size; + cr = cb + size/4; + + bf_yuv422_to_yuv420p (lum, cb, cr, video_buf, s->width, s->height); + + return size + halfsize; +} + +static int grab_read_header (AVFormatContext *s1, AVFormatParameters *ap) +{ + VideoData *s = s1->priv_data; + AVStream *st; + int width, height; + int frame_rate; + + if (!ap || ap->width <= 0 || ap->height <= 0 || ap->frame_rate <= 0) + return -1; + + width = ap->width; + height = ap->height; + frame_rate = ap->frame_rate; + st = av_new_stream(s1, 0); + if (!st) + return -ENOMEM; + s1->priv_data = s; + s1->nb_streams = 1; + s1->streams[0] = st; + + s->width = width; + s->height = height; + s->frame_rate = frame_rate; + s->frame_size = width*height*2; /*RGB*/ + st->codec.pix_fmt = PIX_FMT_YUV420P; + st->codec.codec_id = CODEC_ID_RAWVIDEO; + st->codec.width = width; + st->codec.height = height; + st->codec.frame_rate = frame_rate; + + return bktr_init(s1, ap); +} + +static int grab_read_close (AVFormatContext *s1) +{ + VideoData *s = s1->priv_data; + + int c = METEOR_CAP_STOP_CONT; + ioctl(s->fd, METEORCAPTUR, &c); + close(s->fd); + close(s->tuner_fd); + free(s); + return 0; +} + +AVInputFormat video_grab_device_format = { + "video_grab_device", + "video grab", + sizeof(VideoData), + NULL, + grab_read_header, + grab_read_packet, + grab_read_close, + flags: AVFMT_NOFILE, +}; + +int video_grab_init(void) +{ + av_register_input_format(&video_grab_device_format); + return 0; +} |
