42 lines
2.6 KiB
C
42 lines
2.6 KiB
C
/*
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* Copyright (c) 2011-2019 Belledonne Communications SARL.
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*
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* This file is part of bcg729.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GAINQUANTIZATION_H
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#define GAINQUANTIZATION_H
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void initGainQuantization(bcg729EncoderChannelContextStruct *encoderChannelContext);
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/*****************************************************************************/
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/* gainQuantization : compute quantized adaptative and fixed codebooks gains */
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/* spec 3.9 */
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/* parameters: */
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/* -(i/o) encoderChannelContext : the channel context data */
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/* -(i) targetSignal: 40 values in Q0, x in eq63 */
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/* -(i) filteredAdaptativeCodebookVector: 40 values in Q0, y in eq63 */
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/* -(i) convolvedFixedCodebookVector: 40 values in Q12, z in eq63 */
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/* -(i) fixedCodebookVector: 40 values in Q13 */
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/* -(i) xy in Q0 on 64 bits term of eq63 computed previously */
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/* -(i) yy in Q0 on 64 bits term of eq63 computed previously */
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/* -(o) quantizedAdaptativeCodebookGain : in Q14 */
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/* -(o) quantizedFixedCodebookGain : in Q1 */
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/* -(o) gainCodebookStage1 : GA parameter value (3 bits) */
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/* -(o) gainCodebookStage2 : GB parameter value (4 bits) */
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/* */
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/*****************************************************************************/
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void gainQuantization(bcg729EncoderChannelContextStruct *encoderChannelContext, word16_t targetSignal[], word16_t filteredAdaptativeCodebookVector[], word16_t convolvedFixedCodebookVector[], word16_t fixedCodebookVector[], word64_t Xy64, word64_t Yy64,
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word16_t *quantizedAdaptativeCodebookGain, word16_t *quantizedFixedCodebookGain, uint16_t *gainCodebookStage1, uint16_t *gainCodebookStage2);
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#endif /* ifndef GAINQUANTIZATION_H */
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