#include "rockmacros.h"
#include "defs.h"
#include "pcm.h"

struct pcm pcm IBSS_ATTR;

#define N_BUFS 2
#define BUF_SIZE 2048

#if CONFIG_CODEC == SWCODEC

bool doneplay=1;
bool bufnum=0;

static unsigned short *buf=0;

static bool newly_started;

void get_more(unsigned char** start, size_t* size)
{
    *start = (unsigned char*)(&buf[pcm.len*doneplay]);
    *size = BUF_SIZE*sizeof(short);
    doneplay=1;
}

void pcm_init(void)
{
    if(plugbuf)
        return;

    newly_started = true;
    
    pcm.hz = SAMPR_44;
    pcm.stereo = 1;

    pcm.len = BUF_SIZE;
    if(!buf)
    {
        buf = my_malloc(pcm.len * N_BUFS *sizeof(short));

        pcm.buf = buf;
        pcm.pos = 0;
        memset(buf, 0,  pcm.len * N_BUFS*sizeof(short));
    }

    rb->pcm_play_stop();

#if INPUT_SRC_CAPS != 0
    /* Select playback */
    rb->audio_set_input_source(AUDIO_SRC_PLAYBACK, SRCF_PLAYBACK);
    rb->audio_set_output_source(AUDIO_SRC_PLAYBACK);
#endif
   
    rb->pcm_set_frequency(pcm.hz); /* 44100 22050 11025 */
}

void pcm_close(void)
{
    memset(&pcm, 0, sizeof pcm);    
    newly_started = true;   
    rb->pcm_play_stop();    
    rb->pcm_set_frequency(HW_SAMPR_DEFAULT);
}

int pcm_submit(void)
{
    if (!pcm.buf) return 0;
    if (pcm.pos < pcm.len) return 1;

    if(newly_started)
    {
        rb->pcm_play_data(&get_more,NULL,0);
        newly_started = false;
    }

    while (!doneplay)
    {rb->yield();}

    doneplay=0;

    pcm.pos = 0;
    return 1;
}

#else

void pcm_init(void)
{
    pcm.hz = 44100;
    pcm.stereo = 1;
    pcm.buf = NULL;
    pcm.len = 0;
    pcm.pos = 0;
}

void pcm_close(void)
{
    memset(&pcm, 0, sizeof pcm);
}

int pcm_submit(void)
{
    pcm.pos =0;
    return 0;
}

#endif