diff options
Diffstat (limited to 'libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.cpp')
| -rw-r--r-- | libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.cpp | 116 |
1 files changed, 58 insertions, 58 deletions
diff --git a/libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.cpp b/libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.cpp index b10add9dac..bc78a15b67 100644 --- a/libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.cpp +++ b/libs/appleutility/CoreAudio/AudioCodecs/ACPublic/ACSimpleCodec.cpp @@ -2,14 +2,14 @@ File: ACSimpleCodec.cpp Abstract: ACSimpleCodec.h Version: 1.1 - + Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Inc. ("Apple") in consideration of your agreement to the following terms, and your use, installation, modification or redistribution of this Apple software constitutes acceptance of these terms. If you do not agree with these terms, please do not use, install, modify or redistribute this Apple software. - + In consideration of your agreement to abide by the following terms, and subject to these terms, Apple grants you a personal, non-exclusive license, under Apple's copyrights in this original Apple software (the @@ -25,13 +25,13 @@ implied, are granted by Apple herein, including but not limited to any patent rights that may be infringed by your derivative works or by other works in which the Apple Software may be incorporated. - + The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS. - + IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS @@ -40,9 +40,9 @@ AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - + Copyright (C) 2014 Apple Inc. All Rights Reserved. - + */ //============================================================================= // Includes @@ -81,8 +81,8 @@ void ACSimpleCodec::Initialize(const AudioStreamBasicDescription* inInputFormat, if (mInputFormat.mBytesPerPacket == 0) { CODEC_THROW(kAudioCodecUnsupportedFormatError); - } - + } + ACBaseCodec::Initialize(inInputFormat, inOutputFormat, inMagicCookie, inMagicCookieByteSize); } @@ -91,11 +91,11 @@ void ACSimpleCodec::Uninitialize() // get rid of the buffer delete[] mInputBuffer; mInputBuffer = NULL; - + // reset the ring buffer state mInputBufferStart = 0; mInputBufferEnd = 0; - + ACBaseCodec::Uninitialize(); } @@ -105,11 +105,11 @@ void ACSimpleCodec::Reset() if (mInputBuffer) { // could be called before allocated. memset(mInputBuffer, 0, mInputBufferByteSize); } - + // reset the ring buffer state mInputBufferStart = 0; mInputBufferEnd = 0; - + ACBaseCodec::Reset(); } @@ -121,7 +121,7 @@ UInt32 ACSimpleCodec::GetInputBufferByteSize() const UInt32 ACSimpleCodec::GetUsedInputBufferByteSize() const { UInt32 theAnswer = 0; - + // this object uses a ring buffer if(mInputBufferStart <= mInputBufferEnd) { @@ -130,10 +130,10 @@ UInt32 ACSimpleCodec::GetUsedInputBufferByteSize() const } else { - // the active region wraps around + // the active region wraps around theAnswer = (mInputBufferByteSize - mInputBufferStart) + mInputBufferEnd; } - + return theAnswer; } @@ -142,7 +142,7 @@ void ACSimpleCodec::AppendInputData(const void* inInputData, UInt32& ioInputData { // this buffer handling code doesn't care about such things as the packet descriptions if(!mIsInitialized) CODEC_THROW(kAudioCodecStateError); - + // this is a ring buffer we're dealing with, so we need to set up a few things UInt32 theUsedByteSize = GetUsedInputBufferByteSize(); UInt32 theAvailableByteSize = GetInputBufferByteSize() - theUsedByteSize; @@ -150,51 +150,51 @@ void ACSimpleCodec::AppendInputData(const void* inInputData, UInt32& ioInputData UInt32 theMaxAvailableInputBytes = ioInputDataByteSize; // we can't consume more than we get const Byte* theInputData = static_cast<const Byte*>(inInputData); - + // >>jamesmcc: added this because ioNumberPackets was not being updated if less was taken than given. // THIS ASSUMES CBR! UInt32 bytesPerPacketOfInput = mInputFormat.mBytesPerPacket; UInt32 theAvailablePacketSize = theAvailableByteSize / bytesPerPacketOfInput; - + UInt32 minPacketSize = ioNumberPackets < theAvailablePacketSize ? ioNumberPackets : theAvailablePacketSize; UInt32 minByteSize = minPacketSize * bytesPerPacketOfInput; - + // we can copy only as much data as there is or up to how much space is availiable ioNumberPackets = minPacketSize; ioInputDataByteSize = minByteSize; - + // ioInputDataByteSize had better be <= to theMaxAvailableInputBytes or we're screwed if (ioInputDataByteSize > theMaxAvailableInputBytes) { CODEC_THROW(kAudioCodecStateError); } - // <<jamesmcc - + // <<jamesmcc + // now we have to copy the data taking into account the wrap around and where the start is if(mInputBufferEnd + ioInputDataByteSize < mInputBufferByteSize) { // no wrap around here memcpy(mInputBuffer + mInputBufferEnd, theInputData, ioInputDataByteSize); - + // adjust the end point mInputBufferEnd += ioInputDataByteSize; } else { // the copy will wrap - + // copy the first part UInt32 theBeforeWrapByteSize = mInputBufferByteSize - mInputBufferEnd; memcpy(mInputBuffer + mInputBufferEnd, theInputData, theBeforeWrapByteSize); - + // and the rest UInt32 theAfterWrapByteSize = ioInputDataByteSize - theBeforeWrapByteSize; memcpy(mInputBuffer, theInputData + theBeforeWrapByteSize, theAfterWrapByteSize); - + // adjust the end point mInputBufferEnd = theAfterWrapByteSize; } - + } @@ -202,46 +202,46 @@ void ACSimpleCodec::ZeroPadInputData(UInt32& ioNumberPackets, const AudioStreamP { // this buffer handling code doesn't care about such things as the packet descriptions if(!mIsInitialized) CODEC_THROW(kAudioCodecStateError); - - + + // this is a ring buffer we're dealing with, so we need to set up a few things UInt32 theUsedByteSize = GetUsedInputBufferByteSize(); UInt32 theAvailableByteSize = GetInputBufferByteSize() - theUsedByteSize; - + // >>jamesmcc: added this because ioNumberPackets was not being updated if less was taken than given. // THIS ASSUMES CBR! UInt32 bytesPerPacketOfInput = mInputFormat.mBytesPerPacket; UInt32 theAvailablePacketSize = theAvailableByteSize / bytesPerPacketOfInput; - + UInt32 minPacketSize = ioNumberPackets < theAvailablePacketSize ? ioNumberPackets : theAvailablePacketSize; UInt32 minByteSize = minPacketSize * bytesPerPacketOfInput; - + // we can copy only as much data as there is or up to how much space is availiable ioNumberPackets = minPacketSize; - - // <<jamesmcc - + + // <<jamesmcc + // now we have to copy the data taking into account the wrap around and where the start is if(mInputBufferEnd + minByteSize < mInputBufferByteSize) { // no wrap around here memset(mInputBuffer + mInputBufferEnd, 0, minByteSize); - + // adjust the end point mInputBufferEnd += minByteSize; } else { // the copy will wrap - + // copy the first part UInt32 theBeforeWrapByteSize = mInputBufferByteSize - mInputBufferEnd; memset(mInputBuffer + mInputBufferEnd, 0, theBeforeWrapByteSize); - + // and the rest UInt32 theAfterWrapByteSize = minByteSize - theBeforeWrapByteSize; memset(mInputBuffer, 0, theAfterWrapByteSize); - + // adjust the end point mInputBufferEnd = theAfterWrapByteSize; } @@ -252,32 +252,32 @@ void ACSimpleCodec::ConsumeInputData(UInt32 inConsumedByteSize) { // this is a convenience routine to make maintaining the ring buffer state easy UInt32 theContiguousRange = GetInputBufferContiguousByteSize(); - + if(inConsumedByteSize > GetUsedInputBufferByteSize()) CODEC_THROW(kAudioCodecUnspecifiedError); - + if(inConsumedByteSize <= theContiguousRange) { // the region to consume doesn't wrap - + // figure out how much to consume inConsumedByteSize = (theContiguousRange < inConsumedByteSize) ? theContiguousRange : inConsumedByteSize; - + // clear the consumed bits memset(mInputBuffer + mInputBufferStart, 0, inConsumedByteSize); - + // adjust the start mInputBufferStart += inConsumedByteSize; } else { // the region to consume will wrap - + // clear the bits to the end of the buffer memset(mInputBuffer + mInputBufferStart, 0, theContiguousRange); - + // now clear the bits left from the start memset(mInputBuffer, 0, inConsumedByteSize - theContiguousRange); - + // adjust the start mInputBufferStart = inConsumedByteSize - theContiguousRange; } @@ -287,24 +287,24 @@ void ACSimpleCodec::ConsumeInputData(UInt32 inConsumedByteSize) Byte* ACSimpleCodec::GetBytes(UInt32& ioNumberBytes) const { // if a client's algorithm has to have contiguous data and mInputBuffer wraps, then someone has to make a copy. - // I can do it more efficiently than the client. - + // I can do it more efficiently than the client. + if(!mIsInitialized) CODEC_THROW(kAudioCodecStateError); UInt32 theUsedByteSize = GetUsedInputBufferByteSize(); //UInt32 theAvailableByteSize = GetInputBufferByteSize() - theUsedByteSize; - + if (ioNumberBytes > theUsedByteSize) ioNumberBytes = theUsedByteSize; - + SInt32 leftOver = mInputBufferStart + ioNumberBytes - mInputBufferByteSize; - + if(leftOver > 0) { - // need to copy beginning of buffer to the end. + // need to copy beginning of buffer to the end. // We cleverly over allocated our buffer space to make this possible. memmove(mInputBuffer + mInputBufferByteSize, mInputBuffer, leftOver); } - + return GetInputBufferStart(); } @@ -312,17 +312,17 @@ Byte* ACSimpleCodec::GetBytes(UInt32& ioNumberBytes) const void ACSimpleCodec::ReallocateInputBuffer(UInt32 inInputBufferByteSize) { mInputBufferByteSize = inInputBufferByteSize + kBufferPad; - + // toss the old buffer delete[] mInputBuffer; mInputBuffer = NULL; - + // allocate the new one // allocate extra in order to allow making contiguous data. UInt32 allocSize = 2*inInputBufferByteSize + kBufferPad; mInputBuffer = new Byte[allocSize]; memset(mInputBuffer, 0, allocSize); - + // reset the ring buffer state mInputBufferStart = 0; mInputBufferEnd = 0; @@ -359,6 +359,6 @@ void ACSimpleCodec::SetProperty(AudioCodecPropertyID inPropertyID, UInt32 inProp break; default: ACBaseCodec::SetProperty(inPropertyID, inPropertyDataSize, inPropertyData); - break; + break; } } |