Source/platform/audio/DownSampler.cpp - Issue 604753003: Removing #ifdefs for WEB_AUDIO compile time flag.

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Issue 604753003: Removing #ifdefs for WEB_AUDIO compile time flag. (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: Created 6 years, 2 months ago

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1 /*	1 /*

2 * Copyright (C) 2013 Google Inc. All rights reserved.	2 * Copyright (C) 2013 Google Inc. All rights reserved.

3 *	3 *

4 * Redistribution and use in source and binary forms, with or without	4 * Redistribution and use in source and binary forms, with or without

5 * modification, are permitted provided that the following conditions are	5 * modification, are permitted provided that the following conditions are

6 * met:	6 * met:

7 *	7 *

8 * * Redistributions of source code must retain the above copyright	8 * * Redistributions of source code must retain the above copyright

9 * notice, this list of conditions and the following disclaimer.	9 * notice, this list of conditions and the following disclaimer.

10 * * Redistributions in binary form must reproduce the above	10 * * Redistributions in binary form must reproduce the above

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23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT	23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

29 */	29 */

30	30

31 #include "config.h"	31 #include "config.h"

32	32

33 #if ENABLE(WEB_AUDIO)

34

35 #include "platform/audio/DownSampler.h"	33 #include "platform/audio/DownSampler.h"

36	34

37 #include "wtf/MathExtras.h"	35 #include "wtf/MathExtras.h"

38	36

39 namespace blink {	37 namespace blink {

40	38

41 DownSampler::DownSampler(size_t inputBlockSize)	39 DownSampler::DownSampler(size_t inputBlockSize)

42 : m_inputBlockSize(inputBlockSize)	40 : m_inputBlockSize(inputBlockSize)

43 , m_reducedKernel(DefaultKernelSize / 2)	41 , m_reducedKernel(DefaultKernelSize / 2)

44 , m_convolver(inputBlockSize / 2) // runs at 1/2 source sample-rate	42 , m_convolver(inputBlockSize / 2) // runs at 1/2 source sample-rate

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140 m_inputBuffer.zero();	138 m_inputBuffer.zero();

141 }	139 }

142	140

143 size_t DownSampler::latencyFrames() const	141 size_t DownSampler::latencyFrames() const

144 {	142 {

145 // Divide by two since this is a linear phase kernel and the delay is at the center of the kernel.	143 // Divide by two since this is a linear phase kernel and the delay is at the center of the kernel.

146 return m_reducedKernel.size() / 2;	144 return m_reducedKernel.size() / 2;

147 }	145 }

148	146

149 } // namespace blink	147 } // namespace blink

150

151 #endif // ENABLE(WEB_AUDIO)

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