media/libopus/silk/resampler_private.h@6474c204b198 (annotated)
media/libopus/silk/resampler_private.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /*********************************************************************** |
| michael@0 | 2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| michael@0 | 3 | Redistribution and use in source and binary forms, with or without |
| michael@0 | 4 | modification, are permitted provided that the following conditions |
| michael@0 | 5 | are met: |
| michael@0 | 6 | - Redistributions of source code must retain the above copyright notice, |
| michael@0 | 7 | this list of conditions and the following disclaimer. |
| michael@0 | 8 | - Redistributions in binary form must reproduce the above copyright |
| michael@0 | 9 | notice, this list of conditions and the following disclaimer in the |
| michael@0 | 10 | documentation and/or other materials provided with the distribution. |
| michael@0 | 11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the |
| michael@0 | 12 | names of specific contributors, may be used to endorse or promote |
| michael@0 | 13 | products derived from this software without specific prior written |
| michael@0 | 14 | permission. |
| michael@0 | 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| michael@0 | 16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| michael@0 | 17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| michael@0 | 18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| michael@0 | 19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| michael@0 | 20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| michael@0 | 21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| michael@0 | 22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| michael@0 | 23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| michael@0 | 24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| michael@0 | 25 | POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 26 | ***********************************************************************/ |
| michael@0 | 27 | |
| michael@0 | 28 | #ifndef SILK_RESAMPLER_PRIVATE_H |
| michael@0 | 29 | #define SILK_RESAMPLER_PRIVATE_H |
| michael@0 | 30 | |
| michael@0 | 31 | #ifdef __cplusplus |
| michael@0 | 32 | extern "C" { |
| michael@0 | 33 | #endif |
| michael@0 | 34 | |
| michael@0 | 35 | #include "SigProc_FIX.h" |
| michael@0 | 36 | #include "resampler_structs.h" |
| michael@0 | 37 | #include "resampler_rom.h" |
| michael@0 | 38 | |
| michael@0 | 39 | /* Number of input samples to process in the inner loop */ |
| michael@0 | 40 | #define RESAMPLER_MAX_BATCH_SIZE_MS 10 |
| michael@0 | 41 | #define RESAMPLER_MAX_FS_KHZ 48 |
| michael@0 | 42 | #define RESAMPLER_MAX_BATCH_SIZE_IN ( RESAMPLER_MAX_BATCH_SIZE_MS * RESAMPLER_MAX_FS_KHZ ) |
| michael@0 | 43 | |
| michael@0 | 44 | /* Description: Hybrid IIR/FIR polyphase implementation of resampling */ |
| michael@0 | 45 | void silk_resampler_private_IIR_FIR( |
| michael@0 | 46 | void *SS, /* I/O Resampler state */ |
| michael@0 | 47 | opus_int16 out[], /* O Output signal */ |
| michael@0 | 48 | const opus_int16 in[], /* I Input signal */ |
| michael@0 | 49 | opus_int32 inLen /* I Number of input samples */ |
| michael@0 | 50 | ); |
| michael@0 | 51 | |
| michael@0 | 52 | /* Description: Hybrid IIR/FIR polyphase implementation of resampling */ |
| michael@0 | 53 | void silk_resampler_private_down_FIR( |
| michael@0 | 54 | void *SS, /* I/O Resampler state */ |
| michael@0 | 55 | opus_int16 out[], /* O Output signal */ |
| michael@0 | 56 | const opus_int16 in[], /* I Input signal */ |
| michael@0 | 57 | opus_int32 inLen /* I Number of input samples */ |
| michael@0 | 58 | ); |
| michael@0 | 59 | |
| michael@0 | 60 | /* Upsample by a factor 2, high quality */ |
| michael@0 | 61 | void silk_resampler_private_up2_HQ_wrapper( |
| michael@0 | 62 | void *SS, /* I/O Resampler state (unused) */ |
| michael@0 | 63 | opus_int16 *out, /* O Output signal [ 2 * len ] */ |
| michael@0 | 64 | const opus_int16 *in, /* I Input signal [ len ] */ |
| michael@0 | 65 | opus_int32 len /* I Number of input samples */ |
| michael@0 | 66 | ); |
| michael@0 | 67 | |
| michael@0 | 68 | /* Upsample by a factor 2, high quality */ |
| michael@0 | 69 | void silk_resampler_private_up2_HQ( |
| michael@0 | 70 | opus_int32 *S, /* I/O Resampler state [ 6 ] */ |
| michael@0 | 71 | opus_int16 *out, /* O Output signal [ 2 * len ] */ |
| michael@0 | 72 | const opus_int16 *in, /* I Input signal [ len ] */ |
| michael@0 | 73 | opus_int32 len /* I Number of input samples */ |
| michael@0 | 74 | ); |
| michael@0 | 75 | |
| michael@0 | 76 | /* Second order AR filter */ |
| michael@0 | 77 | void silk_resampler_private_AR2( |
| michael@0 | 78 | opus_int32 S[], /* I/O State vector [ 2 ] */ |
| michael@0 | 79 | opus_int32 out_Q8[], /* O Output signal */ |
| michael@0 | 80 | const opus_int16 in[], /* I Input signal */ |
| michael@0 | 81 | const opus_int16 A_Q14[], /* I AR coefficients, Q14 */ |
| michael@0 | 82 | opus_int32 len /* I Signal length */ |
| michael@0 | 83 | ); |
| michael@0 | 84 | |
| michael@0 | 85 | #ifdef __cplusplus |
| michael@0 | 86 | } |
| michael@0 | 87 | #endif |
| michael@0 | 88 | #endif /* SILK_RESAMPLER_PRIVATE_H */ |
