| /****************************************************************************** |
| * |
| * 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. |
| * |
| ******************************************************************************/ |
| |
| /******************************************************************************* |
| * @file readsamplesjoint.inc |
| * |
| * This is the body of the generic version of OI_SBC_ReadSamplesJoint(). |
| * It is designed to be \#included into a function as follows: |
| \code |
| void OI_SBC_ReadSamplesJoint4(OI_CODEC_SBC_COMMON_CONTEXT *common, OI_BITSTREAM *global_bs) |
| { |
| #define NROF_SUBBANDS 4 |
| #include "readsamplesjoint.inc" |
| #undef NROF_SUBBANDS |
| } |
| |
| void OI_SBC_ReadSamplesJoint8(OI_CODEC_SBC_COMMON_CONTEXT *common, OI_BITSTREAM *global_bs) |
| { |
| #define NROF_SUBBANDS 8 |
| #include "readsamplesjoint.inc" |
| #undef NROF_SUBBANDS |
| } |
| \endcode |
| * Or to make a generic version: |
| \code |
| void OI_SBC_ReadSamplesJoint(OI_CODEC_SBC_COMMON_CONTEXT *common, OI_BITSTREAM *global_bs) |
| { |
| OI_UINT nrof_subbands = common->frameInfo.nrof_subbands; |
| |
| #define NROF_SUBBANDS nrof_subbands |
| #include "readsamplesjoint.inc" |
| #undef NROF_SUBBANDS |
| } |
| \endcode |
| * @ingroup codec_internal |
| *******************************************************************************/ |
| |
| /********************************************************************************** |
| $Revision: #1 $ |
| ***********************************************************************************/ |
| |
| { |
| OI_CODEC_SBC_COMMON_CONTEXT *common = &context->common; |
| OI_UINT bl = common->frameInfo.nrof_blocks; |
| OI_INT32 * RESTRICT s = common->subdata; |
| OI_UINT8 *ptr = global_bs->ptr.w; |
| OI_UINT32 value = global_bs->value; |
| OI_UINT bitPtr = global_bs->bitPtr; |
| OI_UINT8 jmask = common->frameInfo.join << (8 - NROF_SUBBANDS); |
| |
| do { |
| OI_INT8 *sf_array = &common->scale_factor[0]; |
| OI_UINT8 *bits_array = &common->bits.uint8[0]; |
| OI_UINT8 joint = jmask; |
| OI_UINT sb; |
| /* |
| * Left channel |
| */ |
| sb = NROF_SUBBANDS; |
| do { |
| OI_UINT32 raw; |
| OI_INT32 dequant; |
| OI_UINT8 bits = *bits_array++; |
| OI_INT sf = *sf_array++; |
| |
| OI_BITSTREAM_READUINT(raw, bits, ptr, value, bitPtr); |
| dequant = OI_SBC_Dequant(raw, sf, bits); |
| *s++ = dequant; |
| } while (--sb); |
| /* |
| * Right channel |
| */ |
| sb = NROF_SUBBANDS; |
| do { |
| OI_UINT32 raw; |
| OI_INT32 dequant; |
| OI_UINT8 bits = *bits_array++; |
| OI_INT sf = *sf_array++; |
| |
| OI_BITSTREAM_READUINT(raw, bits, ptr, value, bitPtr); |
| dequant = OI_SBC_Dequant(raw, sf, bits); |
| /* |
| * Check if we need to do mid/side |
| */ |
| if (joint & 0x80) { |
| OI_INT32 mid = *(s - NROF_SUBBANDS); |
| OI_INT32 side = dequant; |
| *(s - NROF_SUBBANDS) = mid + side; |
| dequant = mid - side; |
| } |
| joint <<= 1; |
| *s++ = dequant; |
| } while (--sb); |
| } while (--bl); |
| } |