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#include "rockmacros.h"
#include "defs.h"
#include "pcm.h"
struct pcm pcm IBSS_ATTR;
#define N_BUFS 2
#define BUF_SIZE 1024
#if CONFIG_CODEC == SWCODEC && !defined(SIMULATOR)
bool doneplay=1;
static unsigned char *buf=0;
static unsigned short *gmbuf;
static bool newly_started;
void get_more(unsigned char** start, size_t* size)
{
*start = (unsigned char*)(&gmbuf[pcm.len*doneplay]);
*size = BUF_SIZE*sizeof(short);
}
void pcm_init(void)
{
if(plugbuf)
return;
newly_started = true;
pcm.hz = 11025;
pcm.stereo = 1;
pcm.len = BUF_SIZE;
if(!buf)
{
buf = my_malloc(pcm.len * N_BUFS);
gmbuf = my_malloc(pcm.len * N_BUFS*sizeof (short));
pcm.buf = buf;
pcm.pos = 0;
memset(gmbuf, 0, pcm.len * N_BUFS *sizeof(short));
memset(buf, 0, pcm.len * N_BUFS);
}
rb->pcm_play_stop();
rb->pcm_set_frequency(11025); /* 44100 22050 11025 */
}
void pcm_close(void)
{
memset(&pcm, 0, sizeof pcm);
newly_started = true;
rb->pcm_play_stop();
rb->pcm_set_frequency(44100);
}
int pcm_submit(void)
{
register int i;
if (pcm.pos < pcm.len) return 1;
doneplay=!doneplay;
if(doneplay)
pcm.buf = buf + pcm.len;
else
pcm.buf = buf;
pcm.pos = 0;
/* gotta convert the 8 bit buffer to 16 */
for(i=0; i<pcm.len;i++)
gmbuf[i+pcm.len*doneplay] = (pcm.buf[i]<<8)-0x8000;
if(newly_started)
{
rb->pcm_play_data(&get_more,NULL,0);
newly_started = false;
}
return 1;
}
#else
static byte buf1_unal[(BUF_SIZE / sizeof(short)) + 2]; /* 4 byte aligned */
void pcm_init(void)
{
pcm.hz = 11025;
pcm.stereo = 1;
pcm.buf = buf1_unal;
pcm.len = (BUF_SIZE / sizeof(short));
pcm.pos = 0;
}
void pcm_close(void)
{
memset(&pcm, 0, sizeof pcm);
}
int pcm_submit(void)
{
pcm.pos =0;
return 0;
}
#endif
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