Provide Support to Detect Bit Depth and Number of Channels

[david-pace]

In general it is not possible to tell the bit depth and the number of channels by analyzing the audio bytes. However, under certain conditions it is possible to exclude some combinations of bit depth and number of channels.

Assuming all audio bytes are still present, the following assumptions can be made:

• divisible by 6: 24 bit stereo
• divisible by 4: 16 bit stereo
• divisible by 3: 24 bit mono
• divisible by 2: 16 bit mono

The problem is that some of those cases apply at the same time, e.g. if the number is divisible by 6 it is also divisible by 3 and 2. Worst case would be multiples of 12, for which all possibilities would apply.