void AudioPlaySdRaw::update(void)
{
unsigned int i, n;
audio_block_t *block;
// only update if we're playing
if (!playing) return;
// allocate the audio blocks to transmit
block = allocate();
if (block == NULL) return;
if (rawfile.available()) {
// we can read more data from the file...
n = rawfile.read(block->data, AUDIO_BLOCK_SAMPLES*2);
file_offset += n;
for (i=n/2; i < AUDIO_BLOCK_SAMPLES; i++) {
block->data[i] = 0;
}
transmit(block);
} else {
rawfile.close();
AudioStopUsingSPI();
playing = false;
}
release(block);
}
void AudioLoadSdRaw::stop(void)
{
__disable_irq();
if (playing) {
playing = false;
__enable_irq();
AudioStopUsingSPI();
} else {
__enable_irq();
}
}
void AudioPlaySerialflashRaw::stop(void)
{
__disable_irq();
if (playing) {
playing = 0;
__enable_irq();
rawfile.close();
AudioStopUsingSPI();
} else {
__enable_irq();
}
}
bool AudioPlaySerialflashRaw::play(const char *filename)
{
stop();
AudioStartUsingSPI();
rawfile = SerialFlash.open(filename);
if (!rawfile) {
//Serial.println("unable to open file");
AudioStopUsingSPI();
return false;
}
file_size = rawfile.size();
file_offset = 0;
//Serial.println("able to open file");
playing = true;
return true;
}
bool AudioPlaySerialflashRaw::play(const char *filename)
{
stop();
AudioStartUsingSPI();
rawfile = SerialFlash.open(filename);
if (!rawfile) {
//Serial.println("unable to open file");
AudioStopUsingSPI();
return false;
}
file_size = rawfile.size();
file_offset = 0;
//Serial.println("able to open file");
if(!strcmp(filename + strlen(filename) - 3, "ULW")) playing = 0x01; //ulaw
else playing = 0x81; //PCM 16 bit
return true;
}
void AudioPlaySdWav::stop(void)
{
__disable_irq();
if (state != STATE_STOP) {
audio_block_t *b1 = block_left;
block_left = NULL;
audio_block_t *b2 = block_right;
block_right = NULL;
state = STATE_STOP;
__enable_irq();
if (b1) release(b1);
if (b2) release(b2);
wavfile.close();
AudioStopUsingSPI();
} else {
__enable_irq();
}
}
void AudioLoadSdRaw::update(void)
{
bool moreData;
unsigned int i, n;
audio_block_t *block;
// only update if we're playing
if (!playing) return;
// allocate the audio blocks to transmit
block = allocate();
if (block == NULL) return;
if (goForward) {
moreData = rawfile.available();
} else {
moreData = rawfile.position() > 0;
rawfile.seek(rawfile.position()-AUDIO_BLOCK_SAMPLES*4); // *2 would take us back to where we just were
}
// We'll be decimating/interpolating into pending_block here
if (moreData) {
// we can read more data from the file...
n = rawfile.read(block->data, AUDIO_BLOCK_SAMPLES*2);
for (i=n/2; i < AUDIO_BLOCK_SAMPLES; i++) {
block->data[i] = 0;
}
if (! goForward) {
reverseMem(block->data);
}
submit(block);
} else {
flush();
rawfile.close();
AudioStopUsingSPI();
playing = false;
}
release(block);
}
void AudioPlaySdWav::update(void)
{
int32_t n;
// only update if we're playing
if (state == STATE_STOP) return;
// allocate the audio blocks to transmit
block_left = allocate();
if (block_left == NULL) return;
if (state < 8 && (state & 1) == 1) {
// if we're playing stereo, allocate another
// block for the right channel output
block_right = allocate();
if (block_right == NULL) {
release(block_left);
return;
}
} else {
// if we're playing mono or just parsing
// the WAV file header, no right-side block
block_right = NULL;
}
block_offset = 0;
//Serial.println("update");
// is there buffered data?
n = buffer_length - buffer_offset;
if (n > 0) {
// we have buffered data
if (consume(n)) return; // it was enough to transmit audio
}
// we only get to this point when buffer[512] is empty
if (state != STATE_STOP && wavfile.available()) {
// we can read more data from the file...
readagain:
buffer_length = wavfile.read(buffer, 512);
if (buffer_length == 0) goto end;
buffer_offset = 0;
bool parsing = (state >= 8);
bool txok = consume(buffer_length);
if (txok) {
if (state != STATE_STOP) return;
} else {
if (state != STATE_STOP) {
if (parsing && state < 8) goto readagain;
else goto cleanup;
}
}
}
end: // end of file reached or other reason to stop
wavfile.close();
AudioStopUsingSPI();
state_play = STATE_STOP;
state = STATE_STOP;
cleanup:
if (block_left) {
if (block_offset > 0) {
for (uint32_t i=block_offset; i < AUDIO_BLOCK_SAMPLES; i++) {
block_left->data[i] = 0;
}
transmit(block_left, 0);
if (state < 8 && (state & 1) == 0) {
transmit(block_left, 1);
}
}
release(block_left);
block_left = NULL;
}
if (block_right) {
if (block_offset > 0) {
for (uint32_t i=block_offset; i < AUDIO_BLOCK_SAMPLES; i++) {
block_right->data[i] = 0;
}
transmit(block_right, 1);
}
release(block_right);
block_right = NULL;
}
}