The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/content/media/webaudio/WebAudioUtils.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,110 @@
     1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
     1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
     1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.9 +
    1.10 +#include "WebAudioUtils.h"
    1.11 +#include "AudioNodeStream.h"
    1.12 +#include "AudioParamTimeline.h"
    1.13 +#include "blink/HRTFDatabaseLoader.h"
    1.14 +#include "speex/speex_resampler.h"
    1.15 +
    1.16 +namespace mozilla {
    1.17 +
    1.18 +namespace dom {
    1.19 +
    1.20 +struct ConvertTimeToTickHelper
    1.21 +{
    1.22 +  AudioNodeStream* mSourceStream;
    1.23 +  AudioNodeStream* mDestinationStream;
    1.24 +
    1.25 +  static int64_t Convert(double aTime, void* aClosure)
    1.26 +  {
    1.27 +    ConvertTimeToTickHelper* This = static_cast<ConvertTimeToTickHelper*> (aClosure);
    1.28 +    MOZ_ASSERT(This->mSourceStream->SampleRate() == This->mDestinationStream->SampleRate());
    1.29 +    return This->mSourceStream->
    1.30 +      TicksFromDestinationTime(This->mDestinationStream, aTime);
    1.31 +  }
    1.32 +};
    1.33 +
    1.34 +void
    1.35 +WebAudioUtils::ConvertAudioParamToTicks(AudioParamTimeline& aParam,
    1.36 +                                        AudioNodeStream* aSource,
    1.37 +                                        AudioNodeStream* aDest)
    1.38 +{
    1.39 +  MOZ_ASSERT(!aSource || aSource->SampleRate() == aDest->SampleRate());
    1.40 +  ConvertTimeToTickHelper ctth;
    1.41 +  ctth.mSourceStream = aSource;
    1.42 +  ctth.mDestinationStream = aDest;
    1.43 +  aParam.ConvertEventTimesToTicks(ConvertTimeToTickHelper::Convert, &ctth, aDest->SampleRate());
    1.44 +}
    1.45 +
    1.46 +void
    1.47 +WebAudioUtils::Shutdown()
    1.48 +{
    1.49 +  WebCore::HRTFDatabaseLoader::shutdown();
    1.50 +}
    1.51 +
    1.52 +int
    1.53 +WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
    1.54 +                                     uint32_t aChannel,
    1.55 +                                     const float* aIn, uint32_t* aInLen,
    1.56 +                                     float* aOut, uint32_t* aOutLen)
    1.57 +{
    1.58 +#ifdef MOZ_SAMPLE_TYPE_S16
    1.59 +  nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp1;
    1.60 +  nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp2;
    1.61 +  tmp1.SetLength(*aInLen);
    1.62 +  tmp2.SetLength(*aOutLen);
    1.63 +  ConvertAudioSamples(aIn, tmp1.Elements(), *aInLen);
    1.64 +  int result = speex_resampler_process_int(aResampler, aChannel, tmp1.Elements(), aInLen, tmp2.Elements(), aOutLen);
    1.65 +  ConvertAudioSamples(tmp2.Elements(), aOut, *aOutLen);
    1.66 +  return result;
    1.67 +#else
    1.68 +  return speex_resampler_process_float(aResampler, aChannel, aIn, aInLen, aOut, aOutLen);
    1.69 +#endif
    1.70 +}
    1.71 +
    1.72 +int
    1.73 +WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
    1.74 +                                     uint32_t aChannel,
    1.75 +                                     const int16_t* aIn, uint32_t* aInLen,
    1.76 +                                     float* aOut, uint32_t* aOutLen)
    1.77 +{
    1.78 +  nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp;
    1.79 +#ifdef MOZ_SAMPLE_TYPE_S16
    1.80 +  tmp.SetLength(*aOutLen);
    1.81 +  int result = speex_resampler_process_int(aResampler, aChannel, aIn, aInLen, tmp.Elements(), aOutLen);
    1.82 +  ConvertAudioSamples(tmp.Elements(), aOut, *aOutLen);
    1.83 +  return result;
    1.84 +#else
    1.85 +  tmp.SetLength(*aInLen);
    1.86 +  ConvertAudioSamples(aIn, tmp.Elements(), *aInLen);
    1.87 +  int result = speex_resampler_process_float(aResampler, aChannel, tmp.Elements(), aInLen, aOut, aOutLen);
    1.88 +  return result;
    1.89 +#endif
    1.90 +}
    1.91 +
    1.92 +int
    1.93 +WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
    1.94 +                                     uint32_t aChannel,
    1.95 +                                     const int16_t* aIn, uint32_t* aInLen,
    1.96 +                                     int16_t* aOut, uint32_t* aOutLen)
    1.97 +{
    1.98 +#ifdef MOZ_SAMPLE_TYPE_S16
    1.99 +  return speex_resampler_process_int(aResampler, aChannel, aIn, aInLen, aOut, aOutLen);
   1.100 +#else
   1.101 +  nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp1;
   1.102 +  nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp2;
   1.103 +  tmp1.SetLength(*aInLen);
   1.104 +  tmp2.SetLength(*aOutLen);
   1.105 +  ConvertAudioSamples(aIn, tmp1.Elements(), *aInLen);
   1.106 +  int result = speex_resampler_process_float(aResampler, aChannel, tmp1.Elements(), aInLen, tmp2.Elements(), aOutLen);
   1.107 +  ConvertAudioSamples(tmp2.Elements(), aOut, *aOutLen);
   1.108 +  return result;
   1.109 +#endif
   1.110 +}
   1.111 +
   1.112 +}
   1.113 +}