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| this software without specific prior written permission. |
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| ***********************************************************************/ |
| |
| #ifndef SILK_RESAMPLER_H |
| #define SILK_RESAMPLER_H |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #include "SigProc_FIX.h" |
| #include "resampler_structs.h" |
| #include "resampler_rom.h" |
| |
| /* Number of input samples to process in the inner loop */ |
| #define RESAMPLER_MAX_BATCH_SIZE_IN 480 |
| |
| /* Description: Hybrid IIR/FIR polyphase implementation of resampling */ |
| void silk_resampler_private_IIR_FIR( |
| void *SS, /* I/O Resampler state */ |
| opus_int16 out[], /* O Output signal */ |
| const opus_int16 in[], /* I Input signal */ |
| opus_int32 inLen /* I Number of input samples */ |
| ); |
| |
| /* Description: Hybrid IIR/FIR polyphase implementation of resampling */ |
| void silk_resampler_private_down_FIR( |
| void *SS, /* I/O Resampler state */ |
| opus_int16 out[], /* O Output signal */ |
| const opus_int16 in[], /* I Input signal */ |
| opus_int32 inLen /* I Number of input samples */ |
| ); |
| |
| /* Upsample by a factor 2, high quality */ |
| void silk_resampler_private_up2_HQ_wrapper( |
| void *SS, /* I/O Resampler state (unused) */ |
| opus_int16 *out, /* O Output signal [ 2 * len ] */ |
| const opus_int16 *in, /* I Input signal [ len ] */ |
| opus_int32 len /* I Number of input samples */ |
| ); |
| |
| /* Upsample by a factor 2, high quality */ |
| void silk_resampler_private_up2_HQ( |
| opus_int32 *S, /* I/O Resampler state [ 6 ] */ |
| opus_int16 *out, /* O Output signal [ 2 * len ] */ |
| const opus_int16 *in, /* I Input signal [ len ] */ |
| opus_int32 len /* I Number of input samples */ |
| ); |
| |
| /* Second order AR filter */ |
| void silk_resampler_private_AR2( |
| opus_int32 S[], /* I/O State vector [ 2 ] */ |
| opus_int32 out_Q8[], /* O Output signal */ |
| const opus_int16 in[], /* I Input signal */ |
| const opus_int16 A_Q14[], /* I AR coefficients, Q14 */ |
| opus_int32 len /* I Signal length */ |
| ); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| #endif /* SILK_RESAMPLER_H*/ |
| |