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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
#include "gfx.h"
#if GFX_USE_GAUDIO && GAUDIO_NEED_PLAY
/* Include the driver defines */
#include "../../../src/gaudio/gaudio_driver_play.h"
/* Forward definition */
static void gaudio_play_pwm_timer_callbackI(void);
/* Include the board interface */
#include "gaudio_play_board.h"
static GDataBuffer *pplay;
static ArrayDataFormat playfmt;
static size_t playlen;
static uint8_t *pdata;
static void gaudio_play_pwm_timer_callbackI(void) {
if (pplay) {
// Get the next value from the current data buffer
if (gfxSampleFormatBits(playfmt) > 8) {
gaudio_play_pwm_setI(*(uint16_t *)pdata);
pdata += 2;
} else {
gaudio_play_pwm_setI(*pdata);
pdata++;
}
// Are we done yet
if (--playlen)
return;
gaudioPlayReleaseDataBlockI(pplay);
// Get a new data buffer
if (!(pplay = gaudioPlayGetDataBlockI())) {
// All is done
gaudioPlayDoneI();
return;
}
} else {
// Get a new data buffer
if (!(pplay = gaudioPlayGetDataBlockI()))
return;
}
// Set up ready for the new buffer
playlen = pplay->len;
if (gfxSampleFormatBits(playfmt) > 8)
playlen >>= 1;
pdata = (uint8_t *)(pplay+1);
}
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
gBool gaudio_play_lld_init(uint16_t channel, uint32_t frequency, ArrayDataFormat format) {
(void) channel;
if (format != ARRAY_DATA_8BITUNSIGNED && format != ARRAY_DATA_10BITUNSIGNED)
return gFalse;
playfmt = format;
return gaudio_play_pwm_setup(frequency, format);
}
gBool gaudio_play_lld_set_volume(uint8_t vol) {
(void) vol;
return gFalse;
}
void gaudio_play_lld_start(void) {
gfxSystemLock();
// Get a new data buffer
if (pplay || !(pplay = gaudioPlayGetDataBlockI())) {
gfxSystemUnlock(); // Nothing to do
return;
}
// Set up ready for the new buffer
playlen = pplay->len;
if (gfxSampleFormatBits(playfmt) > 8)
playlen >>= 1;
pdata = (uint8_t *)(pplay+1);
gfxSystemUnlock();
// Start the playing
gaudio_play_pwm_start();
}
void gaudio_play_lld_stop(void) {
// Stop everything
gaudio_play_pwm_stop();
// We may need to clean up the remaining buffer.
gfxSystemLock();
if (pplay) {
gaudioPlayReleaseDataBlockI(pplay);
pplay = 0;
gaudioPlayDoneI();
}
gfxSystemUnlock();
}
#endif /* GFX_USE_GAUDIO && GAUDIO_NEED_PLAY */
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