DD2-monitor/audio/player.c

99 rader
2.1 KiB
C

/*
* Audio player for the phytotron
*/
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <ao/ao.h>
#include <sndfile.h>
/* --------------------------------------------------------------------- */
#define T_BUFF_WAVES (8192*4)
#define T_FNAME 1000
static ao_device *device;
static ao_sample_format format;
static int coefficient;
static int16_t buffer[T_BUFF_WAVES];
/* --------------------------------------------------------------------- */
int init_waveout(int smplrate)
{
int default_driver;
ao_initialize();
default_driver = ao_default_driver_id();
#if DEBUG_LEVEL
fprintf(stderr, "%s : ao default driver #%d\n", __func__, default_driver);
#endif
memset(&format, 0, sizeof(format));
format.bits = 16;
format.channels = 2;
format.rate = smplrate;
format.byte_format = AO_FMT_LITTLE;
device = ao_open_live(default_driver, &format, NULL);
if (device == NULL) {
fprintf(stderr, "Error opening AO device.\n");
return -1;
}
return 0;
}
/* --------------------------------------------------------------------- */
int close_waveout(void)
{
ao_close(device);
ao_shutdown();
return 0;
}
/* --------------------------------------------------------------------- */
int blast_this_file(char *fname)
{
SNDFILE *sndf;
SF_INFO sfinfo;
int foo, lus;
sndf = sf_open(fname, SFM_READ, &sfinfo);
if (NULL==sndf)
{
perror("sf_open");
abort();
}
#if DEBUG_LEVEL
fprintf(stderr, "samplerate : %d\n", sfinfo.samplerate);
fprintf(stderr, "frames : %ld\n", sfinfo.frames);
fprintf(stderr, "seekable : %d\n", sfinfo.seekable);
#endif
while ((lus = sf_read_short(sndf, buffer, T_BUFF_WAVES)))
{
#if DEBUG_LEVEL
fprintf(stderr, "%s : %d bytes read\n", fname, lus);
#endif
}
/* do some cleanup */
sf_close(sndf);
return -1;
}
/* --------------------------------------------------------------------- */
/* --------------------------------------------------------------------- */