Difference between revisions of "CSC111 Lab 5 Solutions 2014"
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--[[User:Thiebaut|D. Thiebaut]] ([[User talk:Thiebaut|talk]]) 21:37, 25 February 2014 (EST) | --[[User:Thiebaut|D. Thiebaut]] ([[User talk:Thiebaut|talk]]) 21:37, 25 February 2014 (EST) | ||
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| + | |||
| + | <onlydft> | ||
| + | |||
=Solution Programs for Lab #5= | =Solution Programs for Lab #5= | ||
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sourceValue = getSampleValueAt( sound, i) | sourceValue = getSampleValueAt( sound, i) | ||
destValue = getSampleValueAt( sound, i+offset ) | destValue = getSampleValueAt( sound, i+offset ) | ||
| − | setSampleValueAt( sound, i+offset, sourceValue + destValue ) | + | setSampleValueAt( sound, i+offset, sourceValue//3 + destValue ) |
blockingPlay( sound ) | blockingPlay( sound ) | ||
""" | """ | ||
| + | |||
| + | # ======================================================= | ||
| + | # reverse the whole waveform | ||
| + | file = pickAFile() | ||
| + | sound = makeSound( file ) | ||
| + | blockingPlay( sound ) | ||
| + | |||
| + | # make j the index of the last sample in the sound | ||
| + | j = getLength(sound)-1 | ||
| + | |||
| + | # make i go from beginning of sound to half way. | ||
| + | for i in range( getLength( sound ) // 2 ): | ||
| + | # get the two samples at Index i and at Index j | ||
| + | valueAti = getSampleValueAt( sound, i ) | ||
| + | valueAtj = getSampleValueAt( sound, j ) | ||
| + | |||
| + | # swap them | ||
| + | temp = valueAti | ||
| + | valueAti = valueAtj | ||
| + | valueAtj = temp | ||
| + | |||
| + | # put the swapped versions back in sound | ||
| + | setSampleValueAt( sound, i, valueAti ) | ||
| + | setSampleValueAt( sound, j, valueAtj ) | ||
| + | |||
| + | # move j to the left by 1. The for loop moves i to the right | ||
| + | j = j-1 | ||
| + | |||
| + | blockingPlay( sound ) | ||
</source> | </source> | ||
| − | + | </onlydft> | |
| + | |||
<br /> | <br /> | ||
<br /> | <br /> | ||
