summaryrefslogtreecommitdiffstats
path: root/libFDK/include/qmf.h
diff options
context:
space:
mode:
authorDave Burke <daveburke@google.com>2012-04-17 09:51:45 -0700
committerDave Burke <daveburke@google.com>2012-04-17 23:04:43 -0700
commit9bf37cc9712506b2483650c82d3c41152337ef7e (patch)
tree77db44e2bae06e3d144b255628be2b7a55c581d3 /libFDK/include/qmf.h
parenta37315fe10ee143d6d0b28c19d41a476a23e63ea (diff)
downloadODR-AudioEnc-9bf37cc9712506b2483650c82d3c41152337ef7e.tar.gz
ODR-AudioEnc-9bf37cc9712506b2483650c82d3c41152337ef7e.tar.bz2
ODR-AudioEnc-9bf37cc9712506b2483650c82d3c41152337ef7e.zip
Fraunhofer AAC codec.
License boilerplate update to follow. Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5
Diffstat (limited to 'libFDK/include/qmf.h')
-rw-r--r--libFDK/include/qmf.h188
1 files changed, 188 insertions, 0 deletions
diff --git a/libFDK/include/qmf.h b/libFDK/include/qmf.h
new file mode 100644
index 0000000..89c1061
--- /dev/null
+++ b/libFDK/include/qmf.h
@@ -0,0 +1,188 @@
+/****************************************************************************
+
+ (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.
+
+
+ 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.
+
+ $Id$
+
+*******************************************************************************/
+/*!
+ \file qmf.h
+ \brief Complex qmf analysis/synthesis $Revision: 36871 $
+ \author Markus Werner
+
+*/
+#ifndef __QMF_H
+#define __QMF_H
+
+
+
+#include "common_fix.h"
+#include "FDK_tools_rom.h"
+#include "dct.h"
+
+/*
+ * Filter coefficient type definition
+ */
+#ifdef QMF_DATA_16BIT
+#define FIXP_QMF FIXP_SGL
+#define FX_DBL2FX_QMF FX_DBL2FX_SGL
+#define FX_QMF2FX_DBL FX_SGL2FX_DBL
+#define QFRACT_BITS FRACT_BITS
+#else
+#define FIXP_QMF FIXP_DBL
+#define FX_DBL2FX_QMF
+#define FX_QMF2FX_DBL
+#define QFRACT_BITS DFRACT_BITS
+#endif
+
+/* ARM neon optimized QMF analysis filter requires 32 bit input.
+ Implemented for RVCT only, currently disabled. See src/arm/qmf_arm.cpp:45 */
+#define FIXP_QAS FIXP_PCM
+#define QAS_BITS SAMPLE_BITS
+
+#ifdef QMFSYN_STATES_16BIT
+#define FIXP_QSS FIXP_SGL
+#define QSS_BITS FRACT_BITS
+#else
+#define FIXP_QSS FIXP_DBL
+#define QSS_BITS DFRACT_BITS
+#endif
+
+/* Flags for QMF intialization */
+/* Low Power mode flag */
+#define QMF_FLAG_LP 1
+/* Filter is not symetric. This flag is set internally in the QMF initialization as required. */
+#define QMF_FLAG_NONSYMMETRIC 2
+/* Complex Low Delay Filter Bank (or std symmetric filter bank) */
+#define QMF_FLAG_CLDFB 4
+/* Flag indicating that the states should be kept. */
+#define QMF_FLAG_KEEP_STATES 8
+/* Complex Low Delay Filter Bank used in MPEG Surround Encoder */
+#define QMF_FLAG_MPSLDFB 16
+/* Complex Low Delay Filter Bank used in MPEG Surround Encoder allows a optimized calculation of the modulation in qmfForwardModulationHQ() */
+#define QMF_FLAG_MPSLDFB_OPTIMIZE_MODULATION 32
+
+
+typedef struct
+{
+ int lb_scale; /*!< Scale of low band area */
+ int ov_lb_scale; /*!< Scale of adjusted overlap low band area */
+ int hb_scale; /*!< Scale of high band area */
+ int ov_hb_scale; /*!< Scale of adjusted overlap high band area */
+} QMF_SCALE_FACTOR;
+
+struct QMF_FILTER_BANK
+{
+ const FIXP_PFT *p_filter; /*!< Pointer to filter coefficients */
+
+ void *FilterStates; /*!< Pointer to buffer of filter states
+ FIXP_PCM in analyse and
+ FIXP_DBL in synthesis filter */
+ int FilterSize; /*!< Size of prototype filter. */
+ const FIXP_QTW *t_cos; /*!< Modulation tables. */
+ const FIXP_QTW *t_sin;
+ int filterScale; /*!< filter scale */
+
+ int no_channels; /*!< Total number of channels (subbands) */
+ int no_col; /*!< Number of time slots */
+ int lsb; /*!< Top of low subbands */
+ int usb; /*!< Top of high subbands */
+
+ int outScalefactor; /*!< Scale factor of output data (syn only) */
+ FIXP_DBL outGain; /*!< Gain output data (syn only) (init with 0x80000000 to ignore) */
+
+ UINT flags; /*!< flags */
+ UCHAR p_stride; /*!< Stride Factor of polyphase filters */
+
+};
+
+typedef struct QMF_FILTER_BANK *HANDLE_QMF_FILTER_BANK;
+
+void
+qmfAnalysisFiltering( HANDLE_QMF_FILTER_BANK anaQmf, /*!< Handle of Qmf Analysis Bank */
+ FIXP_QMF **qmfReal, /*!< Pointer to real subband slots */
+ FIXP_QMF **qmfImag, /*!< Pointer to imag subband slots */
+ QMF_SCALE_FACTOR *scaleFactor, /*!< Scale factors of QMF data */
+ const INT_PCM *timeIn, /*!< Time signal */
+ const int stride, /*!< Stride factor of audio data */
+ FIXP_QMF *pWorkBuffer /*!< pointer to temporal working buffer */
+ );
+
+void
+qmfSynthesisFiltering( HANDLE_QMF_FILTER_BANK synQmf, /*!< Handle of Qmf Synthesis Bank */
+ FIXP_QMF **QmfBufferReal, /*!< Pointer to real subband slots */
+ FIXP_QMF **QmfBufferImag, /*!< Pointer to imag subband slots */
+ const QMF_SCALE_FACTOR *scaleFactor, /*!< Scale factors of QMF data */
+ const int ov_len, /*!< Length of band overlap */
+ INT_PCM *timeOut, /*!< Time signal */
+ const int stride, /*!< Stride factor of audio data */
+ FIXP_QMF *pWorkBuffer /*!< pointer to temporal working buffer */
+ );
+
+int
+qmfInitAnalysisFilterBank( HANDLE_QMF_FILTER_BANK h_Qmf, /*!< QMF Handle */
+ FIXP_QAS *pFilterStates, /*!< Pointer to filter state buffer */
+ int noCols, /*!< Number of time slots */
+ int lsb, /*!< Number of lower bands */
+ int usb, /*!< Number of upper bands */
+ int no_channels, /*!< Number of critically sampled bands */
+ int flags); /*!< Flags */
+
+void
+qmfAnalysisFilteringSlot( HANDLE_QMF_FILTER_BANK anaQmf, /*!< Handle of Qmf Synthesis Bank */
+ FIXP_QMF *qmfReal, /*!< Low and High band, real */
+ FIXP_QMF *qmfImag, /*!< Low and High band, imag */
+ const INT_PCM *timeIn, /*!< Pointer to input */
+ const int stride, /*!< stride factor of input */
+ FIXP_QMF *pWorkBuffer /*!< pointer to temporal working buffer */
+ );
+
+int
+qmfInitSynthesisFilterBank( HANDLE_QMF_FILTER_BANK h_Qmf, /*!< QMF Handle */
+ FIXP_QSS *pFilterStates, /*!< Pointer to filter state buffer */
+ int noCols, /*!< Number of time slots */
+ int lsb, /*!< Number of lower bands */
+ int usb, /*!< Number of upper bands */
+ int no_channels, /*!< Number of critically sampled bands */
+ int flags); /*!< Flags */
+
+void qmfSynthesisFilteringSlot( HANDLE_QMF_FILTER_BANK synQmf,
+ const FIXP_QMF *realSlot,
+ const FIXP_QMF *imagSlot,
+ const int scaleFactorLowBand,
+ const int scaleFactorHighBand,
+ INT_PCM *timeOut,
+ const int stride,
+ FIXP_QMF *pWorkBuffer);
+
+void
+qmfChangeOutScalefactor (HANDLE_QMF_FILTER_BANK synQmf, /*!< Handle of Qmf Synthesis Bank */
+ int outScalefactor /*!< New scaling factor for output data */
+ );
+
+void
+qmfChangeOutGain (HANDLE_QMF_FILTER_BANK synQmf, /*!< Handle of Qmf Synthesis Bank */
+ FIXP_DBL outputGain /*!< New gain for output data */
+ );
+
+
+
+#endif /* __QMF_H */