public void draw(Canvas canvas) {
if (waveformBytes == null || width == 0) {
return;
}
float totalBarsCount = width / AndroidUtilities.dp(3);
if (totalBarsCount <= 0.1f) {
return;
}
byte value;
int samplesCount = (waveformBytes.length * 8 / 5);
float samplesPerBar = samplesCount / totalBarsCount;
float barCounter = 0;
int nextBarNum = 0;
paintInner.setColor(
messageObject != null
&& !messageObject.isOutOwner()
&& messageObject.isContentUnread()
&& messageObject.messageOwner.to_id.channel_id == 0
? outerColor
: (selected ? selectedColor : innerColor));
paintOuter.setColor(outerColor);
int y = (height - AndroidUtilities.dp(14)) / 2;
int barNum = 0;
int lastBarNum;
int drawBarCount;
for (int a = 0; a < samplesCount; a++) {
if (a != nextBarNum) {
continue;
}
drawBarCount = 0;
lastBarNum = nextBarNum;
while (lastBarNum == nextBarNum) {
barCounter += samplesPerBar;
nextBarNum = (int) barCounter;
drawBarCount++;
}
int bitPointer = a * 5;
int byteNum = bitPointer / 8;
int byteBitOffset = bitPointer - byteNum * 8;
int currentByteCount = 8 - byteBitOffset;
int nextByteRest = 5 - currentByteCount;
value =
(byte)
((waveformBytes[byteNum] >> byteBitOffset)
& ((2 << (Math.min(5, currentByteCount) - 1)) - 1));
if (nextByteRest > 0) {
value <<= nextByteRest;
value |= waveformBytes[byteNum + 1] & ((2 << (nextByteRest - 1)) - 1);
}
for (int b = 0; b < drawBarCount; b++) {
int x = barNum * AndroidUtilities.dp(3);
if (x < thumbX && x + AndroidUtilities.dp(2) < thumbX) {
canvas.drawRect(
x,
y + AndroidUtilities.dp(14 - Math.max(1, 14.0f * value / 31.0f)),
x + AndroidUtilities.dp(2),
y + AndroidUtilities.dp(14),
paintOuter);
} else {
canvas.drawRect(
x,
y + AndroidUtilities.dp(14 - Math.max(1, 14.0f * value / 31.0f)),
x + AndroidUtilities.dp(2),
y + AndroidUtilities.dp(14),
paintInner);
if (x < thumbX) {
canvas.drawRect(
x,
y + AndroidUtilities.dp(14 - Math.max(1, 14.0f * value / 31.0f)),
thumbX,
y + AndroidUtilities.dp(14),
paintOuter);
}
}
barNum++;
}
}
}
