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Diffstat (limited to 'libAACdec/src/channel.h')
| -rw-r--r-- | libAACdec/src/channel.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/libAACdec/src/channel.h b/libAACdec/src/channel.h new file mode 100644 index 0000000..6c5441f --- /dev/null +++ b/libAACdec/src/channel.h @@ -0,0 +1,86 @@ +/***************************** MPEG-4 AAC Decoder ************************** + + (C) Copyright Fraunhofer IIS (2004) + All Rights Reserved + + Please be advised that this software and/or program delivery is + Confidential Information of Fraunhofer and subject to and covered by the + + Fraunhofer IIS Software Evaluation Agreement + between Google Inc. and Fraunhofer + effective and in full force since March 1, 2012. + + You may use this software and/or program only under the terms and + conditions described in the above mentioned Fraunhofer IIS Software + Evaluation Agreement. Any other and/or further use requires a separate agreement. + + + $Id$ + Author(s): Josef Hoepfl + Description: + + This software and/or program is protected by copyright law and international + treaties. Any reproduction or distribution of this software and/or program, + or any portion of it, may result in severe civil and criminal penalties, and + will be prosecuted to the maximum extent possible under law. + +******************************************************************************/ + +#ifndef CHANNEL_H +#define CHANNEL_H + +#include "common_fix.h" + +#include "FDK_bitstream.h" +#include "channelinfo.h" +#include "tpdec_lib.h" + +/** + * \brief Init codeBook SFB indices (section data) with HCB_ESC. Useful for bitstreams + * which do not have any section data, but still SFB's (scale factor bands). This has + * the effect that upto the amount of transmitted SFB are treated as non-zero. + * \param pAacDecoderChannelInfo channel info structure containing a valid icsInfo struct. + */ +void CChannel_CodebookTableInit(CAacDecoderChannelInfo *pAacDecoderChannelInfo); + +/** + * \brief decode a channel element. To be called after CChannelElement_Read() + * \param pAacDecoderChannelInfo pointer to channel data struct. Depending on el_channels either one or two. + * \param pSamplingRateInfo pointer to sample rate information structure + * \param el_channels amount of channels of the element to be decoded. + * \param output pointer to time domain output buffer (ACELP) + * \param stride factor for accessing output + */ +void CChannelElement_Decode ( CAacDecoderChannelInfo *pAacDecoderChannelInfo[2], + CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[2], + SamplingRateInfo *pSamplingRateInfo, + UINT flags, + int el_channels ); + + +/** + * \brief Read channel element of given type from bitstream. + * \param hBs bitstream handle to access bitstream data. + * \param pAacDecoderChannelInfo pointer array to store channel information. + * \param aot Audio Object Type + * \param pSamplingRateInfo sampling rate info table. + * \param flags parser guidance flags + * \param numberOfChannels amoun of channels contained in the object to be parsed. + * \param epConfig the current epConfig value obtained from the Audio Specific Config. + * \param pTp transport decoder handle required for ADTS CRC checking. + * ... + * \return an AAC_DECODER_ERROR error code. + */ +AAC_DECODER_ERROR CChannelElement_Read(HANDLE_FDK_BITSTREAM hBs, + CAacDecoderChannelInfo *pAacDecoderChannelInfo[], + CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], + const AUDIO_OBJECT_TYPE aot, + const SamplingRateInfo *pSamplingRateInfo, + const UINT flags, + const UINT frame_length, + const UCHAR numberOfChannels, + const SCHAR epConfig, + HANDLE_TRANSPORTDEC pTpDec + ); + +#endif /* #ifndef CHANNEL_H */ |