mirror of
https://github.com/mpv-player/mpv
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153 lines
3.7 KiB
C
153 lines
3.7 KiB
C
// testing only, not finished!!!!!!!
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// little TeleVision program by A'rpi/ESP-team
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// based on streamer-old.c video capture util (part of xawtv) by
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// (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <math.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <ctype.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <sys/shm.h>
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#include <sys/ipc.h>
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#include <sys/wait.h>
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#include <asm/types.h> /* XXX glibc */
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#include "videodev.h"
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#include "libvo/video_out.h"
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#define DEVNAME "/dev/video"
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static struct video_mmap gb1,gb2;
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static struct video_capability capability;
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static struct video_channel channel;
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static struct video_mbuf gb_buffers = { 2*0x151000, 0, {0,0x151000 }};
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static unsigned char *map = NULL;
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int main(int argc,char* argv[]){
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vo_functions_t *video_out=NULL;
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char* video_driver=NULL; //"mga"; // default
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int i;
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int fd=-1;
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char* frame=NULL;
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int count=0;
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if(argc>1) video_driver=argv[1];
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// check video_out driver name:
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if(!video_driver)
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video_out=video_out_drivers[0];
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else
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for (i=0; video_out_drivers[i] != NULL; i++){
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const vo_info_t *info = video_out_drivers[i]->get_info ();
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if(strcmp(info->short_name,video_driver) == 0){
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video_out = video_out_drivers[i];break;
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}
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}
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if(!video_out){
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printf("Invalid video output driver name: %s\n",video_driver);
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return 0;
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}
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/* open */
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if (-1 == fd && -1 == (fd = open(DEVNAME,O_RDWR))) {
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fprintf(stderr,"open %s: %s\n",DEVNAME,strerror(errno));
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exit(1);
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}
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/* get settings */
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if (-1 == ioctl(fd,VIDIOCGCAP,&capability)) {
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perror("ioctl VIDIOCGCAP");
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exit(1);
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}
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if (-1 == ioctl(fd,VIDIOCGCHAN,&channel))
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perror("ioctl VIDIOCGCHAN");
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/* mmap() buffer */
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if (-1 == ioctl(fd,VIDIOCGMBUF,&gb_buffers)) {
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perror("ioctl VIDIOCGMBUF");
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}
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map = mmap(0,gb_buffers.size,PROT_READ|PROT_WRITE,MAP_SHARED,fd,0);
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if ((unsigned char*)-1 == map) {
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perror("mmap");
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} else {
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fprintf(stderr,"v4l: mmap()'ed buffer size = 0x%x\n",
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gb_buffers.size);
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}
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/* prepare for grabbing */
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gb1.format = VIDEO_PALETTE_YUV422;
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// gb1.format = VIDEO_PALETTE_RGB24;
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gb1.frame = 0;
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gb1.width = 352;//720;//640;//320;
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gb1.height = 288;//576;//480;//240;
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gb2.format = gb1.format;
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gb2.frame = 1;
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gb2.width = gb1.width;
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gb2.height = gb1.height;
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video_out->init(gb1.width,gb1.height,1024,768,0,0,IMGFMT_YUY2);
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// video_out->init(gb1.width,gb1.height,1024,768,0,0,IMGFMT_RGB|24);
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if (-1 == ioctl(fd,VIDIOCMCAPTURE,&gb1)) {
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if (errno == EAGAIN)
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fprintf(stderr,"grabber chip can't sync (no station tuned in?)\n");
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else
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perror("ioctl VIDIOCMCAPTURE");
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exit(1);
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}
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count++;
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while(1){
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// MAIN LOOP
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if (-1 == ioctl(fd,VIDIOCMCAPTURE,(count%2) ? &gb2 : &gb1)) {
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if (errno == EAGAIN)
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fprintf(stderr,"grabber chip can't sync (no station tuned in?)\n");
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else
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perror("ioctl VIDIOCMCAPTURE");
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exit(1);
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}
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if (-1 == ioctl(fd,VIDIOCSYNC,(count%2) ? &gb1.frame : &gb2.frame)) {
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perror("ioctl VIDIOCSYNC");
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exit(1);
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}
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frame=map + gb_buffers.offsets[(count%2) ? 0 : 1];
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video_out->draw_frame((unsigned char**)&frame);
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video_out->flip_page();
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count++;
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}
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#if 0
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{ FILE *f=fopen("frame.yuv","wb");
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fwrite(map,320*240*2,1,f);
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fclose(f);
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}
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video_out->init(320,240,800,600,0,0,IMGFMT_YUY2);
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video_out->draw_frame(count?map1:map2);
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video_out->flip_page();
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getchar();
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#endif
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}
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