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Add SoundData:slice

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SoundData:slice(start, length = -1)

When length = -1, it will slice until the end.
This commit is contained in:
Miku AuahDark
2020-09-22 13:09:03 +08:00
parent e71441d68b
commit 04b20624b2
3 changed files with 33 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/modules/sound/SoundData.cpp
+17 -2
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@@ -98,7 +98,7 @@ SoundData::SoundData(int samples, int sampleRate, int bitDepth, int channels)
load(samples, sampleRate, bitDepth, channels);
}
SoundData::SoundData(void *d, int samples, int sampleRate, int bitDepth, int channels)
SoundData::SoundData(const void *d, int samples, int sampleRate, int bitDepth, int channels)
: data(0)
, size(0)
, sampleRate(0)
@@ -129,7 +129,7 @@ SoundData *SoundData::clone() const
return new SoundData(*this);
}
void SoundData::load(int samples, int sampleRate, int bitDepth, int channels, void *newData)
void SoundData::load(int samples, int sampleRate, int bitDepth, int channels, const void *newData)
{
if (samples <= 0)
throw love::Exception("Invalid sample count: %d", samples);
@@ -285,5 +285,20 @@ void SoundData::copyFrom(const SoundData *src, int srcStart, int count, int dstS
memcpy(data + dstStart * bytesPerSample, src->data + srcStart * bytesPerSample, count * bytesPerSample);
}
SoundData *SoundData::slice(int start, int length) const
{
int totalSamples = getSampleCount();
if (length == 0)
throw love::Exception("Invalid slice length: 0");
else if (length < 0)
length = totalSamples - start;
if (start < 0 || start + length > totalSamples)
throw love::Exception("Attempt to slice at out-of-range position!");
return new SoundData(data + start * channels * bitDepth/8, length, sampleRate, bitDepth, channels);
}
} // sound
} // love