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112 lines
3.8 KiB
112 lines
3.8 KiB
/****************************************************************************** |
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* |
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* Copyright (C) 2014 The Android Open Source Project |
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* Copyright 2003 - 2004 Open Interface North America, Inc. All rights |
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* reserved. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at: |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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******************************************************************************/ |
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/******************************************************************************* |
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* @file readsamplesjoint.inc |
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* |
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* This is the body of the generic version of OI_SBC_ReadSamplesJoint(). |
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* It is designed to be \#included into a function as follows: |
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\code |
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void OI_SBC_ReadSamplesJoint4(OI_CODEC_SBC_COMMON_CONTEXT *common, OI_BITSTREAM *global_bs) |
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{ |
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#define NROF_SUBBANDS 4 |
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#include "readsamplesjoint.inc" |
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#undef NROF_SUBBANDS |
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} |
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void OI_SBC_ReadSamplesJoint8(OI_CODEC_SBC_COMMON_CONTEXT *common, OI_BITSTREAM *global_bs) |
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{ |
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#define NROF_SUBBANDS 8 |
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#include "readsamplesjoint.inc" |
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#undef NROF_SUBBANDS |
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} |
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\endcode |
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* Or to make a generic version: |
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\code |
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void OI_SBC_ReadSamplesJoint(OI_CODEC_SBC_COMMON_CONTEXT *common, OI_BITSTREAM *global_bs) |
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{ |
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OI_UINT nrof_subbands = common->frameInfo.nrof_subbands; |
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#define NROF_SUBBANDS nrof_subbands |
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#include "readsamplesjoint.inc" |
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#undef NROF_SUBBANDS |
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} |
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\endcode |
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* @ingroup codec_internal |
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******************************************************************************/ |
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/******************************************************************************* |
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$Revision: #1 $ |
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******************************************************************************/ |
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{ |
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OI_CODEC_SBC_COMMON_CONTEXT *common = &context->common; |
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OI_UINT bl = common->frameInfo.nrof_blocks; |
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int32_t * RESTRICT s = common->subdata; |
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uint8_t *ptr = global_bs->ptr.w; |
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uint32_t value = global_bs->value; |
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OI_UINT bitPtr = global_bs->bitPtr; |
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uint8_t jmask = common->frameInfo.join << (8 - NROF_SUBBANDS); |
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do { |
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int8_t *sf_array = &common->scale_factor[0]; |
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uint8_t *bits_array = &common->bits.uint8[0]; |
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uint8_t joint = jmask; |
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OI_UINT sb; |
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/* |
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* Left channel |
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*/ |
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sb = NROF_SUBBANDS; |
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do { |
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uint32_t raw; |
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int32_t dequant; |
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uint8_t bits = *bits_array++; |
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OI_INT sf = *sf_array++; |
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OI_BITSTREAM_READUINT(raw, bits, ptr, value, bitPtr); |
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dequant = OI_SBC_Dequant(raw, sf, bits); |
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*s++ = dequant; |
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} while (--sb); |
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/* |
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* Right channel |
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*/ |
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sb = NROF_SUBBANDS; |
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do { |
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uint32_t raw; |
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int32_t dequant; |
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uint8_t bits = *bits_array++; |
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OI_INT sf = *sf_array++; |
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OI_BITSTREAM_READUINT(raw, bits, ptr, value, bitPtr); |
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dequant = OI_SBC_Dequant(raw, sf, bits); |
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/* |
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* Check if we need to do mid/side |
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*/ |
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if (joint & 0x80) { |
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int32_t mid = *(s - NROF_SUBBANDS); |
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int32_t side = dequant; |
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*(s - NROF_SUBBANDS) = mid + side; |
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dequant = mid - side; |
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} |
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joint <<= 1; |
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*s++ = dequant; |
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} while (--sb); |
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} while (--bl); |
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}
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