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DFPlayer: Avoid jumps in volume when switching song and reducing volume at the same time.

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This commit is contained in:
Neil McKechnie 2023-02-04 20:59:19 +00:00
parent 2f46a8e083
commit 6f5680fce0
1 changed files with 26 additions and 20 deletions
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46
IO_DFPlayer.h
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@ -70,10 +70,12 @@
class DFPlayer : public IODevice {
private:
const uint8_t MAXVOLUME=30;
HardwareSerial *_serial;
bool _playing = false;
uint8_t _inputIndex = 0;
unsigned long _commandSendTime; // Allows timeout processing
uint8_t _lastVolumeLevel = MAXVOLUME;
// When two commands are sent in quick succession, the device sometimes
// fails to execute one. A delay is required between successive commands.
@ -179,41 +181,45 @@ protected:
// Volume may be specified as second parameter to writeAnalogue.
// If value is zero, the player stops playing.
// WriteAnalogue on second pin sets the output volume.
// If starting a new file and setting volume, then avoid a short burst of loud noise by
// the following strategy:
// - If the volume is increasing, start playing the song before setting the volume,
// - If the volume is decreasing, decrease it and then start playing.
//
void _writeAnalogue(VPIN vpin, int value, uint8_t volume=0, uint16_t=0) override {
uint8_t pin = vpin - _firstVpin;
#ifdef DIAG_IO
DIAG(F("DFPlayer: VPIN:%d FileNo:%d Volume:%d"), vpin, value, volume);
#endif
// Validate parameter.
volume = min((uint8_t)30,volume);
if (volume > MAXVOLUME) volume = MAXVOLUME;
if (pin == 0) {
// Play track
if (value > 0) {
#ifdef DIAG_IO
DIAG(F("DFPlayer: Play %d"), value);
#endif
sendPacket(0x03, value); // Play track
_playing = true;
if (volume > 0) {
#ifdef DIAG_IO
DIAG(F("DFPlayer: Volume %d"), volume);
#endif
sendPacket(0x06, volume); // Set volume
if (volume != 0) {
if (volume <= _lastVolumeLevel)
sendPacket(0x06, volume); // Set volume before starting
sendPacket(0x03, value); // Play track
_playing = true;
if (volume > _lastVolumeLevel)
sendPacket(0x06, volume); // Set volume after starting
_lastVolumeLevel = volume;
} else {
// Volume not changed, just play
sendPacket(0x03, value);
_playing = true;
}
} else {
#ifdef DIAG_IO
DIAG(F("DFPlayer: Stop"));
#endif
sendPacket(0x16); // Stop play
_playing = false;
}
} else if (pin == 1) {
// Set volume (0-30)
if (value > 30) value = 30;
else if (value < 0) value = 0;
#ifdef DIAG_IO
DIAG(F("DFPlayer: Volume %d"), value);
#endif
sendPacket(0x06, value);
sendPacket(0x06, value);
_lastVolumeLevel = volume;
}
}