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Bug 921695 - Part 1: Add convert function. r=karlt

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This commit is contained in:
JW Wang 2013-10-01 14:22:54 +08:00
parent 5617597df4
commit 79dc006472
2 changed files with 56 additions and 0 deletions
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41
content/media/webaudio/WebAudioUtils.cpp
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@ -8,6 +8,7 @@
#include "AudioNodeStream.h"
#include "AudioParamTimeline.h"
#include "blink/HRTFDatabaseLoader.h"
#include "speex/speex_resampler.h"
namespace mozilla {
@ -69,5 +70,45 @@ WebAudioUtils::Shutdown()
WebCore::HRTFDatabaseLoader::shutdown();
}
int
WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
uint32_t aChannel,
const float* aIn, uint32_t* aInLen,
float* aOut, uint32_t* aOutLen)
{
#ifdef MOZ_SAMPLE_TYPE_S16
nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp1;
nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp2;
tmp1.SetLength(*aInLen);
tmp2.SetLength(*aOutLen);
ConvertAudioSamples(aIn, tmp1.Elements(), *aInLen);
int result = speex_resampler_process_int(aResampler, aChannel, tmp1.Elements(), aInLen, tmp2.Elements(), aOutLen);
ConvertAudioSamples(tmp2.Elements(), aOut, *aOutLen);
return result;
#else
return speex_resampler_process_float(aResampler, aChannel, aIn, aInLen, aOut, aOutLen);
#endif
}
int
WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
uint32_t aChannel,
const int16_t* aIn, uint32_t* aInLen,
float* aOut, uint32_t* aOutLen)
{
nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp;
#ifdef MOZ_SAMPLE_TYPE_S16
tmp.SetLength(*aOutLen);
int result = speex_resampler_process_int(aResampler, aChannel, aIn, aInLen, tmp.Elements(), aOutLen);
ConvertAudioSamples(tmp.Elements(), aOut, *aOutLen);
return result;
#else
tmp.SetLength(*aInLen);
ConvertAudioSamples(aIn, tmp.Elements(), *aInLen);
int result = speex_resampler_process_float(aResampler, aChannel, tmp.Elements(), aInLen, aOut, aOutLen);
return result;
#endif
}
}
}

15
content/media/webaudio/WebAudioUtils.h
View File

@ -13,6 +13,9 @@
#include "mozilla/FloatingPoint.h"
#include "MediaSegment.h"
// Forward declaration
typedef struct SpeexResamplerState_ SpeexResamplerState;
namespace mozilla {
class AudioNodeStream;
@ -214,6 +217,18 @@ struct WebAudioUtils {
}
static void Shutdown();
static int
SpeexResamplerProcess(SpeexResamplerState* aResampler,
uint32_t aChannel,
const float* aIn, uint32_t* aInLen,
float* aOut, uint32_t* aOutLen);
static int
SpeexResamplerProcess(SpeexResamplerState* aResampler,
uint32_t aChannel,
const int16_t* aIn, uint32_t* aInLen,
float* aOut, uint32_t* aOutLen);
};
}