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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-block.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-block.c')
-rw-r--r-- | TOOLS/audio-block.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/TOOLS/audio-block.c b/TOOLS/audio-block.c new file mode 100644 index 0000000000..443af85e30 --- /dev/null +++ b/TOOLS/audio-block.c @@ -0,0 +1,62 @@ +// 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 256 + +// 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=0; + int r; + int xxx=1024*2; + int audio_fd; + char *dsp="/dev/dsp"; + unsigned int t1,t2; + + 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); + + t1=GetTimer(); + +while(xxx-->0){ + r=write(audio_fd,a_buffer,OUTBURST); + t2=GetTimer(); + if(r<0) printf("Error writting to device\n"); else + if(r==0) printf("EOF writting to device???\n"); else { + printf("[%6d] writting %3d of %3d bytes in %7d us\n",audio_buffer_size,r,OUTBURST,t2-t1); + audio_buffer_size+=r; + } + t1=t2; +} + +close(audio_fd); + +return 0; +} + |