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Jaroslav Kysela 1998-08-30 21:08:15 +00:00
parent e3aad51c38
commit 1e2772d095
1 changed files with 98 additions and 0 deletions
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test/pause.c Normal file
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#include <stdio.h>
#include <malloc.h>
#include "../include/asoundlib.h"
#define AU_FILE "/home/ftp/pub/audio/AlwaysOnTheRun.au"
static void show_playback_status( void *handle )
{
snd_pcm_playback_status_t pstatus;
if ( snd_pcm_playback_status( handle, &pstatus ) < 0 ) {
perror( "playback status" );
return;
}
printf( "PCM playback status:\n" );
printf( " rate = %i\n", pstatus.rate );
printf( " fragments = %i\n", pstatus.fragments );
printf( " fragment_size = %i\n", pstatus.fragment_size );
printf( " count = %i\n", pstatus.count );
printf( " queue = %i\n", pstatus.queue );
printf( " underrun = %i\n", pstatus.underrun );
printf( " time = %i.%i\n", (int)pstatus.time.tv_sec, (int)pstatus.time.tv_usec );
printf( " stime = %i.%i\n", (int)pstatus.stime.tv_sec, (int)pstatus.stime.tv_usec );
printf( " scount = %i\n", pstatus.scount );
}
void main( void )
{
int card = 0, device = 0, err, fd, count, count1, size, idx;
void *handle;
snd_pcm_format_t format;
snd_pcm_playback_status_t status;
char *buffer, *buffer1;
buffer = (char *)malloc( 512 * 1024 );
if ( !buffer ) return;
if ( (err = snd_pcm_open( &handle, card, device, SND_PCM_OPEN_PLAYBACK )) < 0 ) {
fprintf( stderr, "open failed: %s\n", snd_strerror( err ) );
return;
}
format.format = SND_PCM_SFMT_MU_LAW;
format.rate = 8000;
format.channels = 1;
if ( (err = snd_pcm_playback_format( handle, &format )) < 0 ) {
fprintf( stderr, "format setup failed: %s\n", snd_strerror( err ) );
snd_pcm_close( handle );
return;
}
if ( (err = snd_pcm_playback_status( handle, &status )) < 0 ) {
fprintf( stderr, "status failed: %s\n", snd_strerror( err ) );
snd_pcm_close( handle );
return;
}
fd = open( AU_FILE, O_RDONLY );
if ( fd < 0 ) {
perror( "open file" );
snd_pcm_close( handle );
return;
}
idx = 0;
count = read( fd, buffer, 512 * 1024 );
if ( count <= 0 ) {
perror( "read from file" );
snd_pcm_close( handle );
return;
}
close( fd );
if ( !memcmp( buffer, ".snd", 4 ) ) {
idx = (buffer[4]<<24)|(buffer[5]<<16)|(buffer[6]<<8)|(buffer[7]);
if ( idx > 128 ) idx = 128;
if ( idx > count ) idx = count;
}
buffer1 = buffer + idx;
count -= idx;
if ( count < 256 * 1024 ) {
perror( "small count < 256k" );
snd_pcm_close( handle );
return;
}
count1 = status.fragment_size * 12;
show_playback_status( handle );
size = snd_pcm_write( handle, buffer1, count1 );
sleep( 2 );
show_playback_status( handle );
printf( "Pause.. Bytes written %i from %i...\n", size, count1 );
count -= count1;
buffer1 += count1;
snd_pcm_playback_pause( handle, 1 );
show_playback_status( handle );
sleep( 5 );
printf( "Pause end..\n" );
snd_pcm_playback_pause( handle, 0 );
show_playback_status( handle );
size = snd_pcm_write( handle, buffer1, count );
printf( "Pause end.. Bytes written %i from %i...\n", size, count );
snd_pcm_close( handle );
free( buffer );
}