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author | arpi_esp <arpi_esp@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2001-03-16 23:05:01 +0000 |
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committer | arpi_esp <arpi_esp@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2001-03-16 23:05:01 +0000 |
commit | 3d2465ed4d2432383fedf0853a78ad9c54dd6061 (patch) | |
tree | 78e8c7def45f692f5f99bb14648a13d58092968c /TOOLS/audio-select.c | |
parent | c110d4acf5a48d44b576cbfd8aea47d2c02ca99f (diff) | |
download | mpv-3d2465ed4d2432383fedf0853a78ad9c54dd6061.tar.bz2 mpv-3d2465ed4d2432383fedf0853a78ad9c54dd6061.tar.xz |
added audio driver debug tools
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@120 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'TOOLS/audio-select.c')
-rw-r--r-- | TOOLS/audio-select.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/TOOLS/audio-select.c b/TOOLS/audio-select.c new file mode 100644 index 0000000000..872245b5ef --- /dev/null +++ b/TOOLS/audio-select.c @@ -0,0 +1,73 @@ +// This small util discovers your audio driver's behaviour + +#include <stdio.h> +#include <stdlib.h> +#include <fcntl.h> +#include <sys/soundcard.h> + +#include <sys/time.h> +#include <sys/types.h> +#include <unistd.h> + +#define OUTBURST 128 + +// Returns current time in microseconds +unsigned int GetTimer(){ + struct timeval tv; + struct timezone tz; +// float s; + gettimeofday(&tv,&tz); +// s=tv.tv_usec;s*=0.000001;s+=tv.tv_sec; + return (tv.tv_sec*1000000+tv.tv_usec); +} + +static unsigned char a_buffer[OUTBURST]; + +int main(){ + int audio_buffer_size; + int r; + int xxx=1024; + int audio_fd; + char *dsp="/dev/dsp"; + unsigned int t1,t2,t3; + + audio_fd=open(dsp, O_WRONLY); + if(audio_fd<0){ + printf("Can't open audio device %s\n",dsp); + return 1; + } + + r=AFMT_S16_LE;ioctl (audio_fd, SNDCTL_DSP_SETFMT, &r); + r=1; ioctl (audio_fd, SNDCTL_DSP_STEREO, &r); + r=44100; if(ioctl (audio_fd, SNDCTL_DSP_SPEED, &r)==-1) + printf("audio_setup: your card doesn't support %d Hz samplerate\n",r); + + t3=t1=GetTimer(); + +while(xxx>0){ + audio_buffer_size=0; + while(audio_buffer_size<0x100000){ + fd_set rfds; + struct timeval tv; + FD_ZERO(&rfds); FD_SET(audio_fd,&rfds); + tv.tv_sec=0; tv.tv_usec = 0; + if(!select(audio_fd+1, NULL, &rfds, NULL, &tv)) break; + r=write(audio_fd,a_buffer,OUTBURST); + if(r<0) printf("Error writting to device\n"); else + if(r==0) printf("EOF writting to device???\n"); else + audio_buffer_size+=r; + } + t2=GetTimer(); + if(audio_buffer_size>0){ + printf("%6d bytes written in %5d us (wait %5d us)\n",audio_buffer_size,t2-t1,t1-t3); + --xxx; + t3=t2; + } + t1=t2; +} + +close(audio_fd); + +return 0; +} + |