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content/media/webaudio/WebAudioUtils.cpp@97036ab72558 (annotated)

content/media/webaudio/WebAudioUtils.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Tue, 06 Jan 2015 21:39:09 +0100

branch

TOR_BUG_9701

changeset 8

97036ab72558

permissions

-rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

michael@0	1	/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0	2	/* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0	3	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	4	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	5	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	6
michael@0	7	#include "WebAudioUtils.h"
michael@0	8	#include "AudioNodeStream.h"
michael@0	9	#include "AudioParamTimeline.h"
michael@0	10	#include "blink/HRTFDatabaseLoader.h"
michael@0	11	#include "speex/speex_resampler.h"
michael@0	12
michael@0	13	namespace mozilla {
michael@0	14
michael@0	15	namespace dom {
michael@0	16
michael@0	17	struct ConvertTimeToTickHelper
michael@0	18	{
michael@0	19	AudioNodeStream* mSourceStream;
michael@0	20	AudioNodeStream* mDestinationStream;
michael@0	21
michael@0	22	static int64_t Convert(double aTime, void* aClosure)
michael@0	23	{
michael@0	24	ConvertTimeToTickHelper* This = static_cast<ConvertTimeToTickHelper*> (aClosure);
michael@0	25	MOZ_ASSERT(This->mSourceStream->SampleRate() == This->mDestinationStream->SampleRate());
michael@0	26	return This->mSourceStream->
michael@0	27	TicksFromDestinationTime(This->mDestinationStream, aTime);
michael@0	28	}
michael@0	29	};
michael@0	30
michael@0	31	void
michael@0	32	WebAudioUtils::ConvertAudioParamToTicks(AudioParamTimeline& aParam,
michael@0	33	AudioNodeStream* aSource,
michael@0	34	AudioNodeStream* aDest)
michael@0	35	{
michael@0	36	MOZ_ASSERT(!aSource || aSource->SampleRate() == aDest->SampleRate());
michael@0	37	ConvertTimeToTickHelper ctth;
michael@0	38	ctth.mSourceStream = aSource;
michael@0	39	ctth.mDestinationStream = aDest;
michael@0	40	aParam.ConvertEventTimesToTicks(ConvertTimeToTickHelper::Convert, &ctth, aDest->SampleRate());
michael@0	41	}
michael@0	42
michael@0	43	void
michael@0	44	WebAudioUtils::Shutdown()
michael@0	45	{
michael@0	46	WebCore::HRTFDatabaseLoader::shutdown();
michael@0	47	}
michael@0	48
michael@0	49	int
michael@0	50	WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
michael@0	51	uint32_t aChannel,
michael@0	52	const float* aIn, uint32_t* aInLen,
michael@0	53	float* aOut, uint32_t* aOutLen)
michael@0	54	{
michael@0	55	#ifdef MOZ_SAMPLE_TYPE_S16
michael@0	56	nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp1;
michael@0	57	nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp2;
michael@0	58	tmp1.SetLength(*aInLen);
michael@0	59	tmp2.SetLength(*aOutLen);
michael@0	60	ConvertAudioSamples(aIn, tmp1.Elements(), *aInLen);
michael@0	61	int result = speex_resampler_process_int(aResampler, aChannel, tmp1.Elements(), aInLen, tmp2.Elements(), aOutLen);
michael@0	62	ConvertAudioSamples(tmp2.Elements(), aOut, *aOutLen);
michael@0	63	return result;
michael@0	64	#else
michael@0	65	return speex_resampler_process_float(aResampler, aChannel, aIn, aInLen, aOut, aOutLen);
michael@0	66	#endif
michael@0	67	}
michael@0	68
michael@0	69	int
michael@0	70	WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
michael@0	71	uint32_t aChannel,
michael@0	72	const int16_t* aIn, uint32_t* aInLen,
michael@0	73	float* aOut, uint32_t* aOutLen)
michael@0	74	{
michael@0	75	nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp;
michael@0	76	#ifdef MOZ_SAMPLE_TYPE_S16
michael@0	77	tmp.SetLength(*aOutLen);
michael@0	78	int result = speex_resampler_process_int(aResampler, aChannel, aIn, aInLen, tmp.Elements(), aOutLen);
michael@0	79	ConvertAudioSamples(tmp.Elements(), aOut, *aOutLen);
michael@0	80	return result;
michael@0	81	#else
michael@0	82	tmp.SetLength(*aInLen);
michael@0	83	ConvertAudioSamples(aIn, tmp.Elements(), *aInLen);
michael@0	84	int result = speex_resampler_process_float(aResampler, aChannel, tmp.Elements(), aInLen, aOut, aOutLen);
michael@0	85	return result;
michael@0	86	#endif
michael@0	87	}
michael@0	88
michael@0	89	int
michael@0	90	WebAudioUtils::SpeexResamplerProcess(SpeexResamplerState* aResampler,
michael@0	91	uint32_t aChannel,
michael@0	92	const int16_t* aIn, uint32_t* aInLen,
michael@0	93	int16_t* aOut, uint32_t* aOutLen)
michael@0	94	{
michael@0	95	#ifdef MOZ_SAMPLE_TYPE_S16
michael@0	96	return speex_resampler_process_int(aResampler, aChannel, aIn, aInLen, aOut, aOutLen);
michael@0	97	#else
michael@0	98	nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp1;
michael@0	99	nsAutoTArray<AudioDataValue, WEBAUDIO_BLOCK_SIZE*4> tmp2;
michael@0	100	tmp1.SetLength(*aInLen);
michael@0	101	tmp2.SetLength(*aOutLen);
michael@0	102	ConvertAudioSamples(aIn, tmp1.Elements(), *aInLen);
michael@0	103	int result = speex_resampler_process_float(aResampler, aChannel, tmp1.Elements(), aInLen, tmp2.Elements(), aOutLen);
michael@0	104	ConvertAudioSamples(tmp2.Elements(), aOut, *aOutLen);
michael@0	105	return result;
michael@0	106	#endif
michael@0	107	}
michael@0	108
michael@0	109	}
michael@0	110	}