public int Get(ref JitterBuffer.JitterBufferPacket packet, int desired_span, out int start_offset)
{
if (desired_span <= 0)
{
throw new ArgumentOutOfRangeException("desired_span");
}
start_offset = 0;
int i;
if (this.reset_state)
{
bool flag = false;
long num = 0L;
for (i = 0; i < 200; i++)
{
if (this.packets[i].data != null && (!flag || this.packets[i].timestamp < num))
{
num = this.packets[i].timestamp;
flag = true;
}
}
if (!flag)
{
packet.timestamp = 0L;
packet.span = (long)this.interp_requested;
return(1);
}
this.reset_state = false;
this.pointer_timestamp = num;
this.next_stop = num;
}
this.last_returned_timestamp = this.pointer_timestamp;
if (this.interp_requested != 0)
{
packet.timestamp = this.pointer_timestamp;
packet.span = (long)this.interp_requested;
this.pointer_timestamp += (long)this.interp_requested;
packet.len = 0;
this.interp_requested = 0;
this.buffered = packet.span - (long)desired_span;
return(2);
}
i = 0;
while (i < 200 && (this.packets[i].data == null || this.packets[i].timestamp != this.pointer_timestamp || this.packets[i].timestamp + this.packets[i].span < this.pointer_timestamp + (long)desired_span))
{
i++;
}
if (i == 200)
{
i = 0;
while (i < 200 && (this.packets[i].data == null || this.packets[i].timestamp > this.pointer_timestamp || this.packets[i].timestamp + this.packets[i].span < this.pointer_timestamp + (long)desired_span))
{
i++;
}
}
if (i == 200)
{
i = 0;
while (i < 200 && (this.packets[i].data == null || this.packets[i].timestamp > this.pointer_timestamp || this.packets[i].timestamp + this.packets[i].span <= this.pointer_timestamp))
{
i++;
}
}
if (i == 200)
{
bool flag2 = false;
long num2 = 0L;
long num3 = 0L;
int num4 = 0;
for (i = 0; i < 200; i++)
{
if (this.packets[i].data != null && this.packets[i].timestamp < this.pointer_timestamp + (long)desired_span && this.packets[i].timestamp >= this.pointer_timestamp && (!flag2 || this.packets[i].timestamp < num2 || (this.packets[i].timestamp == num2 && this.packets[i].span > num3)))
{
num2 = this.packets[i].timestamp;
num3 = this.packets[i].span;
num4 = i;
flag2 = true;
}
}
if (flag2)
{
i = num4;
}
}
if (i != 200)
{
this.lost_count = 0;
if (this.arrival[i] != 0L)
{
this.UpdateTimings((int)this.packets[i].timestamp - (int)this.arrival[i] - this.buffer_margin);
}
if (this.DestroyBufferCallback != null)
{
packet.data = this.packets[i].data;
packet.len = this.packets[i].len;
}
else
{
if (this.packets[i].len <= packet.len)
{
packet.len = this.packets[i].len;
}
for (long num5 = 0L; num5 < (long)packet.len; num5 += 1L)
{
checked
{
packet.data[(int)((IntPtr)num5)] = this.packets[i].data[(int)((IntPtr)num5)];
}
}
this.FreeBuffer(this.packets[i].data);
}
this.packets[i].data = null;
int num6 = (int)this.packets[i].timestamp - (int)this.pointer_timestamp;
if (start_offset != 0)
{
start_offset = num6;
}
packet.timestamp = this.packets[i].timestamp;
this.last_returned_timestamp = packet.timestamp;
packet.span = this.packets[i].span;
packet.sequence = this.packets[i].sequence;
packet.user_data = this.packets[i].user_data;
packet.len = this.packets[i].len;
this.pointer_timestamp = this.packets[i].timestamp + this.packets[i].span;
this.buffered = packet.span - (long)desired_span;
if (start_offset != 0)
{
this.buffered += (long)start_offset;
}
return(0);
}
this.lost_count++;
short num7 = this.ComputeOptDelay();
if (num7 < 0)
{
this.ShiftTimings((short)-num7);
packet.timestamp = this.pointer_timestamp;
packet.span = (long)(-(long)num7);
packet.len = 0;
this.buffered = packet.span - (long)desired_span;
return(2);
}
packet.timestamp = this.pointer_timestamp;
desired_span = JitterBuffer.RoundDown(desired_span, this.concealment_size);
packet.span = (long)desired_span;
this.pointer_timestamp += (long)desired_span;
packet.len = 0;
this.buffered = packet.span - (long)desired_span;
return(1);
}
private short ComputeOptDelay()
{
short num = 0;
int num2 = 2147483647;
int num3 = 0;
int[] array = new int[3];
bool flag = false;
int num4 = 0;
int num5 = 0;
JitterBuffer.TimingBuffer[] tb = this._tb;
int num6 = 0;
for (int i = 0; i < 3; i++)
{
num6 += tb[i].curr_count;
}
if (num6 == 0)
{
return(0);
}
float num7;
if (this.latency_tradeoff != 0)
{
num7 = (float)this.latency_tradeoff * 100f / (float)num6;
}
else
{
num7 = (float)(this.auto_tradeoff * this.window_size / num6);
}
for (int i = 0; i < 3; i++)
{
array[i] = 0;
}
for (int i = 0; i < 40; i++)
{
int num8 = -1;
int num9 = 32767;
for (int j = 0; j < 3; j++)
{
if (array[j] < tb[j].filled && tb[j].timing[array[j]] < num9)
{
num8 = j;
num9 = tb[j].timing[array[j]];
}
}
if (num8 == -1)
{
break;
}
if (i == 0)
{
num5 = num9;
}
num4 = num9;
num9 = JitterBuffer.RoundDown(num9, this.delay_step);
array[num8]++;
int num10 = (int)((float)(-(float)num9) + num7 * (float)num3);
if (num10 < num2)
{
num2 = num10;
num = (short)num9;
}
num3++;
if (num9 >= 0 && !flag)
{
flag = true;
num3 += 4;
}
}
int num11 = num4 - num5;
this.auto_tradeoff = 1 + num11 / 40;
if (num6 < 40 && num > 0)
{
return(0);
}
return(num);
}