1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libopus/silk/resampler_private.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,88 @@
1.4 +/***********************************************************************
1.5 +Copyright (c) 2006-2011, Skype Limited. All rights reserved.
1.6 +Redistribution and use in source and binary forms, with or without
1.7 +modification, are permitted provided that the following conditions
1.8 +are met:
1.9 +- Redistributions of source code must retain the above copyright notice,
1.10 +this list of conditions and the following disclaimer.
1.11 +- Redistributions in binary form must reproduce the above copyright
1.12 +notice, this list of conditions and the following disclaimer in the
1.13 +documentation and/or other materials provided with the distribution.
1.14 +- Neither the name of Internet Society, IETF or IETF Trust, nor the
1.15 +names of specific contributors, may be used to endorse or promote
1.16 +products derived from this software without specific prior written
1.17 +permission.
1.18 +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
1.19 +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.20 +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.21 +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
1.22 +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
1.23 +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
1.24 +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
1.25 +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
1.26 +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
1.27 +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
1.28 +POSSIBILITY OF SUCH DAMAGE.
1.29 +***********************************************************************/
1.30 +
1.31 +#ifndef SILK_RESAMPLER_PRIVATE_H
1.32 +#define SILK_RESAMPLER_PRIVATE_H
1.33 +
1.34 +#ifdef __cplusplus
1.35 +extern "C" {
1.36 +#endif
1.37 +
1.38 +#include "SigProc_FIX.h"
1.39 +#include "resampler_structs.h"
1.40 +#include "resampler_rom.h"
1.41 +
1.42 +/* Number of input samples to process in the inner loop */
1.43 +#define RESAMPLER_MAX_BATCH_SIZE_MS 10
1.44 +#define RESAMPLER_MAX_FS_KHZ 48
1.45 +#define RESAMPLER_MAX_BATCH_SIZE_IN ( RESAMPLER_MAX_BATCH_SIZE_MS * RESAMPLER_MAX_FS_KHZ )
1.46 +
1.47 +/* Description: Hybrid IIR/FIR polyphase implementation of resampling */
1.48 +void silk_resampler_private_IIR_FIR(
1.49 + void *SS, /* I/O Resampler state */
1.50 + opus_int16 out[], /* O Output signal */
1.51 + const opus_int16 in[], /* I Input signal */
1.52 + opus_int32 inLen /* I Number of input samples */
1.53 +);
1.54 +
1.55 +/* Description: Hybrid IIR/FIR polyphase implementation of resampling */
1.56 +void silk_resampler_private_down_FIR(
1.57 + void *SS, /* I/O Resampler state */
1.58 + opus_int16 out[], /* O Output signal */
1.59 + const opus_int16 in[], /* I Input signal */
1.60 + opus_int32 inLen /* I Number of input samples */
1.61 +);
1.62 +
1.63 +/* Upsample by a factor 2, high quality */
1.64 +void silk_resampler_private_up2_HQ_wrapper(
1.65 + void *SS, /* I/O Resampler state (unused) */
1.66 + opus_int16 *out, /* O Output signal [ 2 * len ] */
1.67 + const opus_int16 *in, /* I Input signal [ len ] */
1.68 + opus_int32 len /* I Number of input samples */
1.69 +);
1.70 +
1.71 +/* Upsample by a factor 2, high quality */
1.72 +void silk_resampler_private_up2_HQ(
1.73 + opus_int32 *S, /* I/O Resampler state [ 6 ] */
1.74 + opus_int16 *out, /* O Output signal [ 2 * len ] */
1.75 + const opus_int16 *in, /* I Input signal [ len ] */
1.76 + opus_int32 len /* I Number of input samples */
1.77 +);
1.78 +
1.79 +/* Second order AR filter */
1.80 +void silk_resampler_private_AR2(
1.81 + opus_int32 S[], /* I/O State vector [ 2 ] */
1.82 + opus_int32 out_Q8[], /* O Output signal */
1.83 + const opus_int16 in[], /* I Input signal */
1.84 + const opus_int16 A_Q14[], /* I AR coefficients, Q14 */
1.85 + opus_int32 len /* I Signal length */
1.86 +);
1.87 +
1.88 +#ifdef __cplusplus
1.89 +}
1.90 +#endif
1.91 +#endif /* SILK_RESAMPLER_PRIVATE_H */
