diff options
author | Joerg Mueller <nexyon@gmail.com> | 2011-06-22 00:35:09 +0400 |
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committer | Joerg Mueller <nexyon@gmail.com> | 2011-06-22 00:35:09 +0400 |
commit | 8e6b5598e075932cab09048bff7ef1e54d657bb8 (patch) | |
tree | ad78c4493b1ed29fe82d750c5188ea578c5ec601 /intern/audaspace/FX/AUD_LimiterReader.cpp | |
parent | 6d5b224184bbd891b40fb0a313e2cc0e9d96a778 (diff) |
3D Audio GSoC:
Adapting all readers to maximally support dynamic resampling/rechanneling, introducing a DynamicIIRFilter for example.
Diffstat (limited to 'intern/audaspace/FX/AUD_LimiterReader.cpp')
-rw-r--r-- | intern/audaspace/FX/AUD_LimiterReader.cpp | 54 |
1 files changed, 37 insertions, 17 deletions
diff --git a/intern/audaspace/FX/AUD_LimiterReader.cpp b/intern/audaspace/FX/AUD_LimiterReader.cpp index 52add8635e3..92feac8a6a3 100644 --- a/intern/audaspace/FX/AUD_LimiterReader.cpp +++ b/intern/audaspace/FX/AUD_LimiterReader.cpp @@ -37,27 +37,43 @@ AUD_LimiterReader::AUD_LimiterReader(AUD_Reference<AUD_IReader> reader, float start, float end) : AUD_EffectReader(reader), - m_start(int(start * reader->getSpecs().rate)), - m_end(int(end * reader->getSpecs().rate)) + m_start(start), + m_end(end) { if(m_start > 0) { + AUD_Specs specs = m_reader->getSpecs(); + AUD_Specs specs2; + if(m_reader->isSeekable()) - m_reader->seek(m_start); + m_reader->seek(m_start * specs.rate); else { // skip first m_start samples by reading them int length = AUD_DEFAULT_BUFFER_SIZE; - AUD_Buffer buffer(AUD_DEFAULT_BUFFER_SIZE * AUD_SAMPLE_SIZE(m_reader->getSpecs())); + AUD_Buffer buffer(AUD_DEFAULT_BUFFER_SIZE * AUD_SAMPLE_SIZE(specs)); bool eos = false; - for(int len = m_start; - length == AUD_DEFAULT_BUFFER_SIZE && !eos; - len -= AUD_DEFAULT_BUFFER_SIZE) + for(int len = m_start * specs.rate; + length > 0 && !eos; + len -= length) { if(len < AUD_DEFAULT_BUFFER_SIZE) length = len; m_reader->read(length, eos, buffer.getBuffer()); + + specs2 = m_reader->getSpecs(); + if(specs2.rate != specs.rate) + { + len = len * specs2.rate / specs.rate; + specs.rate = specs2.rate; + } + + if(specs2.channels != specs.channels) + { + specs = specs2; + buffer.assureSize(AUD_DEFAULT_BUFFER_SIZE * AUD_SAMPLE_SIZE(specs)); + } } } } @@ -65,21 +81,23 @@ AUD_LimiterReader::AUD_LimiterReader(AUD_Reference<AUD_IReader> reader, void AUD_LimiterReader::seek(int position) { - m_reader->seek(position + m_start); + m_reader->seek(position + m_start * m_reader->getSpecs().rate); } int AUD_LimiterReader::getLength() const { int len = m_reader->getLength(); - if(len < 0 || (len > m_end && m_end >= 0)) - len = m_end; - return len - m_start; + AUD_SampleRate rate = m_reader->getSpecs().rate; + if(len < 0 || (len > m_end * rate && m_end >= 0)) + len = m_end * rate; + return len - m_start * rate; } int AUD_LimiterReader::getPosition() const { int pos = m_reader->getPosition(); - return AUD_MIN(pos, m_end) - m_start; + AUD_SampleRate rate = m_reader->getSpecs().rate; + return AUD_MIN(pos, m_end * rate) - m_start * rate; } void AUD_LimiterReader::read(int& length, bool& eos, sample_t* buffer) @@ -88,16 +106,18 @@ void AUD_LimiterReader::read(int& length, bool& eos, sample_t* buffer) if(m_end >= 0) { int position = m_reader->getPosition(); - if(position + length > m_end) + AUD_SampleRate rate = m_reader->getSpecs().rate; + + if(position + length > m_end * rate) { - length = m_end - position; + length = m_end * rate - position; eos = true; } - if(position < m_start) + if(position < m_start * rate) { int len2 = length; - for(int len = m_start - position; + for(int len = m_start * rate - position; len2 == length && !eos; len -= length) { @@ -108,7 +128,7 @@ void AUD_LimiterReader::read(int& length, bool& eos, sample_t* buffer) position += len2; } - if(position < m_start) + if(position < m_start * rate) { length = 0; return; |