#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include<pthread.h>
#include <alsa/asoundlib.h>
#define ALSA_PCM_NEW_HW_PARAMS_API
#include "wavethread.h"
void *threading_process1( void *nting);
#define SAMPS_PER_TICK (256u)
FILE *inFile;
RIFF_HEADER header;
int g_start_Audio = 0;
snd_pcm_t *device;
pthread_t id1;
void audio_init_configure(void)
{
int err;
/* Open PCM device for playback. */
if ((err = snd_pcm_open(&playback_handle, snd_device_out, SND_PCM_STREAM_PLAYBACK, 0)) < 0)
{
fprintf(stderr, "cannot open output audio device %s: %s\n", snd_device_out, snd_strerror(err));
exit(1);
}
pthread_create(&id1,NULL,&threading_process1,NULL);
pthread_join(id1,NULL);
}
int main (int argc , char *argv[])
{
int inframes, outframes,temp=1;
int count;
int chan;
rd_ping_pong = 0;
wr_ping_pong = 0;
/*Validate the command line parameters*/
if(argc<2)
{
printf("usage of player is ./waveplaer wavefile\n"
"Example./waveplayer test.wav\n");
return;
}
/* Open the input file for playing*/
inFile = fopen(argv[1],"rb");
if(inFile == NULL)
{
printf("\n Unable to open input file. \n");
}
//Read the RIFF HEADER DATA
count = fread(&header,44,1,inFile);
audio_init_configure();
while (1)
{
inframes = fread((short *)rdbuf, 4, SAMPS_PER_TICK, inFile);
if(inframes==SAMPS_PER_TICK)
g_start_Audio = 1;
else
g_start_Audio = 0;
/* ----------------------------------------------------------------------
** Determine the number of input and output channels that the current
** audio layout has
** ------------------------------------------------------------------- */
if (g_start_Audio)
{
while ((outframes = snd_pcm_writei(playback_handle, rdbuf, inframes)) < 0)
{
if (outframes == -EAGAIN)
continue;
snd_pcm_prepare(playback_handle);
}
}
else
{
break;
}
}
return 0;
}
void *threading_process1(void *nothing )
{
snd_pcm_hw_params_t *hw_params;
int err,size=SAMPS_PER_TICK;
unsigned int tmp;
snd_pcm_uframes_t frames;
int frame_size;
int sample_rate = header.samplerate;
buffer_size = 8 *size;
snd_pcm_t *device;
/* allocate memory for hardware parameter structure */
if ((err = snd_pcm_hw_params_malloc(&hw_params)) < 0)
{
fprintf (stderr, "cannot allocate parameter structure (%s)\n", snd_strerror(err));
return 0;
}
/* fill structure from current audio parameters */
if ((err = snd_pcm_hw_params_any(device, hw_params)) < 0)
{
fprintf (stderr, "cannot initialize parameter structure (%s)\n", snd_strerror(err));
return 0;
}
/* set access type, sample rate, sample format, channels */
if ((err = snd_pcm_hw_params_set_access(device, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
{
fprintf (stderr, "cannot set access type: %s\n", snd_strerror(err));
return 0;
}
if ((err = snd_pcm_hw_params_set_format(device, hw_params, SND_PCM_FORMAT_S16_LE)) < 0)
{
fprintf (stderr, "cannot set sample format: %s\n",snd_strerror(err));
return 0;
}
tmp = sample_rate;
if ((err = snd_pcm_hw_params_set_rate_near(device, hw_params, &tmp, 0)) < 0)
{
fprintf (stderr, "cannot set sample rate: %s\n",snd_strerror(err));
return 0;
}
if (tmp != sample_rate)
{
fprintf(stderr, "Could not set requested sample rate, asked for %d got %d\n", sample_rate, tmp);
sample_rate = tmp;
}
if ((err = snd_pcm_hw_params_set_channels(device, hw_params, header.no_channels)) < 0)
{
fprintf (stderr, "cannot set channel count: %s\n",snd_strerror(err));
return 0;
}
frames = buffer_size;
if ((err = snd_pcm_hw_params_set_buffer_size_near(device, hw_params, &frames)) < 0)
{
fprintf(stderr, "Error setting buffer_size %lu frames: %s\n", frames, snd_strerror(err));
return 0;
}
if (buffer_size != frames)
{
fprintf(stderr, "Could not set requested buffer size, asked for %d got %lu\n",buffer_size,frames);
buffer_size = frames * frame_size / fragments;
}
if ((err = snd_pcm_hw_params(device, hw_params)) < 0)
{
fprintf(stderr, "Error setting HW params: %s\n",snd_strerror(err));
return 0;
}
snd_pcm_hw_params_free (hw_params);
}
am using :
Linux panda-desktop 3.2.0-1412-omap4 #16-Ubuntu SMP PREEMPT Tue Apr 17 19:38:42 UTC 2012 armv7l armv7l armv7l GNU/Linux
compiler doesnt througing errore
but when execute:
./out2 YedutaNilichindhiChoodu_16000.wav
ASSERTION:'pcm && params'
its not playing wave file.
my_program is to play wavefile using threads
out: pcm_params.c:2286: snd_pcm_hw_refine: Assertion `pcm && params' failed. Aborted
