62 lines
1.8 KiB
Bash
Executable File
62 lines
1.8 KiB
Bash
Executable File
#!/bin/bash
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############################################
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# Takes a list of WAV files for the sound effects,
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# downsamples them to GS-friendly rates,
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# and packs them into a 64k block that can
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# be loaded into Ensoniq RAM
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#
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# IMPORTANT: This depends on sox, which MacOS doesn't have natively.
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# You can get it from Homebrew ("brew install sox")
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#
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# Big thanks to Jeremy Rand, from whom this approach
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# borrows heavily
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# https://github.com/jeremysrand/BuGS/blob/master/BuGS/sound/sources/createRaw
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rm -f "SoundBank#060000"
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rm -f "Sound/SoundMap.txt"
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currAddr=0
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for (( index=1; index<="$#"; index+=2 )); do
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waveFilePath=${!index}
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# Downsample and convert to 8-bit unsigned raw waveform
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rateIndex=$((index+1))
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rate=${!rateIndex}
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sox "$waveFilePath" -c 1 -r "$rate" --bits 8 --encoding unsigned tempSound.raw
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waveFile=$(basename -- "$waveFilePath")
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rawFile="Sound/Generated/${waveFile%.wav}.raw"
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# Replace any 00 bytes with 01 because 00 is the terminator for Ensoniq
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LC_ALL=C tr < tempSound.raw '\000' '\001' > "$rawFile"
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rm tempSound.raw
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# Null-terminate the waveform
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rawSize=`stat -f '%z' "$rawFile"`
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dd if=/dev/zero bs=1 count=1 >> "$rawFile"
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# Pad the file out to a wavetable page boundary
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rawSize=`stat -f '%z' "$rawFile"`
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pageSize=`echo "a=$rawSize; b=4096; if ( a%b ) (a/b+1)*4096 else a/b*4096" | bc`
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let "padding = $pageSize - $rawSize"
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dd if=/dev/zero bs=1 count="$padding" >> "$rawFile"
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# Concatenate to our soundbank
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cat "$rawFile" >> "SoundBank#060000"
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# Update the human-readable sound map (so human can modify loading code as needed)
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soundName="${waveFile%.wav}"
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printf "$%04x\t%s\t%d bytes\t%d Hz\n" "$currAddr" "$soundName" "$pageSize" "$rate" >> "Sound/SoundMap.txt"
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# Increment address for next sound in bank
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currAddr=$((currAddr+pageSize))
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done
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echo
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echo "Sound RAM mapping:"
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cat "Sound/SoundMap.txt"
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