4ede311055
Audio notes (opus codec) A lot of different improvements and bug fixes Thanks to: https://github.com/DrKLO/Telegram/issues/293 https://github.com/DrKLO/Telegram/issues/256 FOSS configuration not ready yet I will move main dev branch to github in next couple commits
89 lines
4.4 KiB
C
89 lines
4.4 KiB
C
/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Internet Society, IETF or IETF Trust, nor the
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names of specific contributors, may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#ifndef SILK_RESAMPLER_PRIVATE_H
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#define SILK_RESAMPLER_PRIVATE_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "SigProc_FIX.h"
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#include "resampler_structs.h"
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#include "resampler_rom.h"
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/* Number of input samples to process in the inner loop */
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#define RESAMPLER_MAX_BATCH_SIZE_MS 10
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#define RESAMPLER_MAX_FS_KHZ 48
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#define RESAMPLER_MAX_BATCH_SIZE_IN ( RESAMPLER_MAX_BATCH_SIZE_MS * RESAMPLER_MAX_FS_KHZ )
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/* Description: Hybrid IIR/FIR polyphase implementation of resampling */
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void silk_resampler_private_IIR_FIR(
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void *SS, /* I/O Resampler state */
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opus_int16 out[], /* O Output signal */
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const opus_int16 in[], /* I Input signal */
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opus_int32 inLen /* I Number of input samples */
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);
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/* Description: Hybrid IIR/FIR polyphase implementation of resampling */
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void silk_resampler_private_down_FIR(
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void *SS, /* I/O Resampler state */
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opus_int16 out[], /* O Output signal */
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const opus_int16 in[], /* I Input signal */
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opus_int32 inLen /* I Number of input samples */
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);
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/* Upsample by a factor 2, high quality */
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void silk_resampler_private_up2_HQ_wrapper(
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void *SS, /* I/O Resampler state (unused) */
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opus_int16 *out, /* O Output signal [ 2 * len ] */
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const opus_int16 *in, /* I Input signal [ len ] */
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opus_int32 len /* I Number of input samples */
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);
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/* Upsample by a factor 2, high quality */
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void silk_resampler_private_up2_HQ(
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opus_int32 *S, /* I/O Resampler state [ 6 ] */
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opus_int16 *out, /* O Output signal [ 2 * len ] */
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const opus_int16 *in, /* I Input signal [ len ] */
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opus_int32 len /* I Number of input samples */
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);
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/* Second order AR filter */
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void silk_resampler_private_AR2(
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opus_int32 S[], /* I/O State vector [ 2 ] */
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opus_int32 out_Q8[], /* O Output signal */
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const opus_int16 in[], /* I Input signal */
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const opus_int16 A_Q14[], /* I AR coefficients, Q14 */
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opus_int32 len /* I Signal length */
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);
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#ifdef __cplusplus
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}
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#endif
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#endif /* SILK_RESAMPLER_PRIVATE_H */
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