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optimizations, AudioSource.Read now reads FLAC samples (int [,]).

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This commit is contained in:
chudov
2008-11-07 22:43:26 +00:00
parent 19f577b815
commit 9844a654ce
6 changed files with 102 additions and 125 deletions
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24
FLACDotNet/flacdotnet.cpp
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@@ -70,7 +70,7 @@ namespace FLACDotNet {
_decoderActive = false;
_sampleOffset = 0;
_samplesWaiting = false;
_samplesWaiting = 0;
_sampleBuffer = nullptr;
_path = path;
@@ -138,7 +138,7 @@ namespace FLACDotNet {
}
void set(Int64 offset) {
_sampleOffset = offset;
_samplesWaiting = false;
_samplesWaiting = 0;
if (!FLAC__stream_decoder_seek_absolute(_decoder, offset)) {
throw gcnew Exception("Unable to seek.");
}
@@ -237,20 +237,18 @@ namespace FLACDotNet {
_decoderActive = false;
}
Int32 Read([Out] array<Int32, 2>^% sampleBuffer) {
int sampleCount;
while (!_samplesWaiting) {
Int32 Read([Out] array<Int32, 2>^% sampleBuffer)
{
while (_samplesWaiting == 0) {
if (!FLAC__stream_decoder_process_single(_decoder)) {
throw gcnew Exception("An error occurred while decoding.");
}
}
sampleCount = _sampleBuffer->GetLength(0);
int sampleCount = _samplesWaiting;
sampleBuffer = _sampleBuffer;
_sampleOffset += sampleCount;
_samplesWaiting = false;
_samplesWaiting = 0;
return sampleCount;
}
@@ -262,7 +260,7 @@ namespace FLACDotNet {
Int64 _sampleCount, _sampleOffset;
Int32 _bitsPerSample, _channelCount, _sampleRate;
array<Int32, 2>^ _sampleBuffer;
bool _samplesWaiting;
int _samplesWaiting;
NameValueCollection^ _tags;
String^ _path;
bool _decoderActive;
@@ -272,7 +270,7 @@ namespace FLACDotNet {
{
Int32 sampleCount = frame->header.blocksize;
if (_samplesWaiting) {
if (_samplesWaiting > 0) {
throw gcnew Exception("Received unrequested samples.");
}
@@ -283,7 +281,7 @@ namespace FLACDotNet {
throw gcnew Exception("Format changes within a file are not allowed.");
}
if ((_sampleBuffer == nullptr) || (_sampleBuffer->GetLength(0) != sampleCount)) {
if ((_sampleBuffer == nullptr) || (_sampleBuffer->GetLength(0) < sampleCount)) {
_sampleBuffer = gcnew array<Int32, 2>(sampleCount, _channelCount);
}
@@ -299,7 +297,7 @@ namespace FLACDotNet {
}
}
_samplesWaiting = true;
_samplesWaiting = sampleCount;
return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
}