ESP-IDF
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Outline
#define _OI_BITSTREAM_H
#include "oi_codec_sbc_private.h"
#include "oi_stddefs.h"
OI_BITSTREAM_ReadInit(OI_BITSTREAM *, const OI_BYTE *);
OI_BITSTREAM_WriteInit(OI_BITSTREAM *, OI_BYTE *);
OI_BITSTREAM_ReadUINT(OI_BITSTREAM *, OI_UINT);
OI_BITSTREAM_ReadUINT4Aligned(OI_BITSTREAM *);
OI_BITSTREAM_ReadUINT8Aligned(OI_BITSTREAM *);
OI_BITSTREAM_WriteUINT(OI_BITSTREAM *, OI_UINT16, OI_UINT);
OI_BITSTREAM_WriteUINT8Aligned(OI_BITSTREAM *, OI_UINT8);
OI_BITSTREAM_Write2xUINT4Aligned(OI_BITSTREAM *, OI_UINT8, OI_UINT8);
#define OI_BITSTREAM_GetWritePtr
#define OI_BITSTREAM_GetReadPtr
Files
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SourceVuESP-IDF Framework and ExamplesESP-IDFcomponents/bt/host/bluedroid/external/sbc/decoder/include/oi_bitstream.h
 
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/****************************************************************************** * * Copyright (C) 2014 The Android Open Source Project * Copyright 2003 - 2004 Open Interface North America, Inc. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ******************************************************************************//* ... */ #ifndef _OI_BITSTREAM_H #define _OI_BITSTREAM_H /********************************************************************************** $Revision: #1 $ ***********************************************************************************//* ... */ /** @file Function prototypes and macro definitions for manipulating input and output bitstreams. @ingroup codec_internal *//* ... */ /** @addtogroup codec_internal @{ *//* ... */ #include "oi_codec_sbc_private.h" #include "oi_stddefs.h" INLINE void OI_BITSTREAM_ReadInit(OI_BITSTREAM *bs, const OI_BYTE *buffer); INLINE void OI_BITSTREAM_WriteInit(OI_BITSTREAM *bs, OI_BYTE *buffer); INLINE OI_UINT32 OI_BITSTREAM_ReadUINT(OI_BITSTREAM *bs, OI_UINT bits); INLINE OI_UINT8 OI_BITSTREAM_ReadUINT4Aligned(OI_BITSTREAM *bs); INLINE OI_UINT8 OI_BITSTREAM_ReadUINT8Aligned(OI_BITSTREAM *bs); INLINE void OI_BITSTREAM_WriteUINT(OI_BITSTREAM *bs, OI_UINT16 value, OI_UINT bits); /* * Use knowledge that the bitstream is aligned to optimize the write of a byte *//* ... */ PRIVATE void OI_BITSTREAM_WriteUINT8Aligned(OI_BITSTREAM *bs, OI_UINT8 datum); /* * Use knowledge that the bitstream is aligned to optimize the write pair of nibbles *//* ... */ PRIVATE void OI_BITSTREAM_Write2xUINT4Aligned(OI_BITSTREAM *bs, OI_UINT8 datum1, OI_UINT8 datum2); /** Internally the bitstream looks ahead in the stream. When * OI_SBC_ReadScalefactors() goes to temporarily break the abstraction, it will * need to know where the "logical" pointer is in the stream. *//* ... */ #define OI_BITSTREAM_GetWritePtr(bs) ((bs)->ptr.w - 3) #define OI_BITSTREAM_GetReadPtr(bs) ((bs)->ptr.r - 3) /** This is declared here as a macro because decoder.c breaks the bitsream * encapsulation for efficiency reasons. *//* ... */ #define OI_BITSTREAM_READUINT(result, bits, ptr, value, bitPtr) \ do { \ OI_ASSERT((bits) <= 16); \ OI_ASSERT((bitPtr) < 16); \ OI_ASSERT((bitPtr) >= 8); \ \ result = (value) << (bitPtr); \ result >>= 32 - (bits); \ \ bitPtr += (bits); \ while (bitPtr >= 16) { \ value = ((value) << 8) | *ptr++; \ bitPtr -= 8; \ }{...} \ OI_ASSERT((bits == 0) || (result < (1u << (bits)))); \ }{...} while (0)... #define OI_BITSTREAM_WRITEUINT(ptr, value, bitPtr, datum, bits) \ do {\ bitPtr -= bits;\ value |= datum << bitPtr;\ \ while (bitPtr <= 16) {\ bitPtr += 8;\ *ptr++ = (OI_UINT8)(value >> 24);\ value <<= 8;\ }{...}\ }{...} while (0)... #define OI_BITSTREAM_WRITEFLUSH(ptr, value, bitPtr) \ do {\ while (bitPtr < 32) {\ bitPtr += 8;\ *ptr++ = (OI_UINT8)(value >> 24);\ value <<= 8;\ }{...}\ }{...} while (0)... 5 defines /** @} *//* ... */ /* ... */ #endif /* _OI_BITSTREAM_H */
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