diff options
Diffstat (limited to 'webrtc/common_audio/signal_processing/include/signal_processing_library.h')
| -rw-r--r-- | webrtc/common_audio/signal_processing/include/signal_processing_library.h | 234 |
1 files changed, 97 insertions, 137 deletions
diff --git a/webrtc/common_audio/signal_processing/include/signal_processing_library.h b/webrtc/common_audio/signal_processing/include/signal_processing_library.h index 2e96883..4ad92c4 100644 --- a/webrtc/common_audio/signal_processing/include/signal_processing_library.h +++ b/webrtc/common_audio/signal_processing/include/signal_processing_library.h @@ -8,91 +8,84 @@ * be found in the AUTHORS file in the root of the source tree. */ - /* - * This header file includes all of the fix point signal processing library (SPL) function - * descriptions and declarations. - * For specific function calls, see bottom of file. + * This header file includes all of the fix point signal processing library + * (SPL) function descriptions and declarations. For specific function calls, + * see bottom of file. */ -#ifndef WEBRTC_SPL_SIGNAL_PROCESSING_LIBRARY_H_ -#define WEBRTC_SPL_SIGNAL_PROCESSING_LIBRARY_H_ +#ifndef COMMON_AUDIO_SIGNAL_PROCESSING_INCLUDE_SIGNAL_PROCESSING_LIBRARY_H_ +#define COMMON_AUDIO_SIGNAL_PROCESSING_INCLUDE_SIGNAL_PROCESSING_LIBRARY_H_ #include <string.h> -#include "webrtc/typedefs.h" + +#include "common_audio/signal_processing/dot_product_with_scale.h" // Macros specific for the fixed point implementation -#define WEBRTC_SPL_WORD16_MAX 32767 -#define WEBRTC_SPL_WORD16_MIN -32768 -#define WEBRTC_SPL_WORD32_MAX (int32_t)0x7fffffff -#define WEBRTC_SPL_WORD32_MIN (int32_t)0x80000000 -#define WEBRTC_SPL_MAX_LPC_ORDER 14 -#define WEBRTC_SPL_MIN(A, B) (A < B ? A : B) // Get min value -#define WEBRTC_SPL_MAX(A, B) (A > B ? A : B) // Get max value +#define WEBRTC_SPL_WORD16_MAX 32767 +#define WEBRTC_SPL_WORD16_MIN -32768 +#define WEBRTC_SPL_WORD32_MAX (int32_t)0x7fffffff +#define WEBRTC_SPL_WORD32_MIN (int32_t)0x80000000 +#define WEBRTC_SPL_MAX_LPC_ORDER 14 +#define WEBRTC_SPL_MIN(A, B) (A < B ? A : B) // Get min value +#define WEBRTC_SPL_MAX(A, B) (A > B ? A : B) // Get max value // TODO(kma/bjorn): For the next two macros, investigate how to correct the code // for inputs of a = WEBRTC_SPL_WORD16_MIN or WEBRTC_SPL_WORD32_MIN. -#define WEBRTC_SPL_ABS_W16(a) \ - (((int16_t)a >= 0) ? ((int16_t)a) : -((int16_t)a)) -#define WEBRTC_SPL_ABS_W32(a) \ - (((int32_t)a >= 0) ? ((int32_t)a) : -((int32_t)a)) - -#define WEBRTC_SPL_MUL(a, b) \ - ((int32_t) ((int32_t)(a) * (int32_t)(b))) -#define WEBRTC_SPL_UMUL(a, b) \ - ((uint32_t) ((uint32_t)(a) * (uint32_t)(b))) -#define WEBRTC_SPL_UMUL_32_16(a, b) \ - ((uint32_t) ((uint32_t)(a) * (uint16_t)(b))) -#define WEBRTC_SPL_MUL_16_U16(a, b) \ - ((int32_t)(int16_t)(a) * (uint16_t)(b)) +#define WEBRTC_SPL_ABS_W16(a) (((int16_t)a >= 0) ? ((int16_t)a) : -((int16_t)a)) +#define WEBRTC_SPL_ABS_W32(a) (((int32_t)a >= 0) ? ((int32_t)a) : -((int32_t)a)) +#define WEBRTC_SPL_MUL(a, b) ((int32_t)((int32_t)(a) * (int32_t)(b))) +#define WEBRTC_SPL_UMUL(a, b) ((uint32_t)((uint32_t)(a) * (uint32_t)(b))) +#define WEBRTC_SPL_UMUL_32_16(a, b) ((uint32_t)((uint32_t)(a) * (uint16_t)(b))) +#define WEBRTC_SPL_MUL_16_U16(a, b) ((int32_t)(int16_t)(a) * (uint16_t)(b)) + +// clang-format off +// clang-format would choose some identation +// leading to presubmit error (cpplint.py) #ifndef WEBRTC_ARCH_ARM_V7 // For ARMv7 platforms, these are inline functions in spl_inl_armv7.h #ifndef MIPS32_LE // For MIPS platforms, these are inline functions in spl_inl_mips.h -#define WEBRTC_SPL_MUL_16_16(a, b) \ - ((int32_t) (((int16_t)(a)) * ((int16_t)(b)))) +#define WEBRTC_SPL_MUL_16_16(a, b) ((int32_t)(((int16_t)(a)) * ((int16_t)(b)))) #define WEBRTC_SPL_MUL_16_32_RSFT16(a, b) \ - (WEBRTC_SPL_MUL_16_16(a, b >> 16) \ - + ((WEBRTC_SPL_MUL_16_16(a, (b & 0xffff) >> 1) + 0x4000) >> 15)) + (WEBRTC_SPL_MUL_16_16(a, b >> 16) + \ + ((WEBRTC_SPL_MUL_16_16(a, (b & 0xffff) >> 1) + 0x4000) >> 15)) #endif #endif -#define WEBRTC_SPL_MUL_16_32_RSFT11(a, b) \ - ((WEBRTC_SPL_MUL_16_16(a, (b) >> 16) << 5) \ - + (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x0200) >> 10)) -#define WEBRTC_SPL_MUL_16_32_RSFT14(a, b) \ - ((WEBRTC_SPL_MUL_16_16(a, (b) >> 16) << 2) \ - + (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x1000) >> 13)) -#define WEBRTC_SPL_MUL_16_32_RSFT15(a, b) \ - ((WEBRTC_SPL_MUL_16_16(a, (b) >> 16) << 1) \ - + (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x2000) >> 14)) +#define WEBRTC_SPL_MUL_16_32_RSFT11(a, b) \ + (WEBRTC_SPL_MUL_16_16(a, (b) >> 16) * (1 << 5) + \ + (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x0200) >> 10)) +#define WEBRTC_SPL_MUL_16_32_RSFT14(a, b) \ + (WEBRTC_SPL_MUL_16_16(a, (b) >> 16) * (1 << 2) + \ + (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x1000) >> 13)) +#define WEBRTC_SPL_MUL_16_32_RSFT15(a, b) \ + ((WEBRTC_SPL_MUL_16_16(a, (b) >> 16) * (1 << 1)) + \ + (((WEBRTC_SPL_MUL_16_U16(a, (uint16_t)(b)) >> 1) + 0x2000) >> 14)) +// clang-format on -#define WEBRTC_SPL_MUL_16_16_RSFT(a, b, c) \ - (WEBRTC_SPL_MUL_16_16(a, b) >> (c)) +#define WEBRTC_SPL_MUL_16_16_RSFT(a, b, c) (WEBRTC_SPL_MUL_16_16(a, b) >> (c)) #define WEBRTC_SPL_MUL_16_16_RSFT_WITH_ROUND(a, b, c) \ - ((WEBRTC_SPL_MUL_16_16(a, b) + ((int32_t) \ - (((int32_t)1) << ((c) - 1)))) >> (c)) + ((WEBRTC_SPL_MUL_16_16(a, b) + ((int32_t)(((int32_t)1) << ((c)-1)))) >> (c)) // C + the 32 most significant bits of A * B #define WEBRTC_SPL_SCALEDIFF32(A, B, C) \ - (C + (B >> 16) * A + (((uint32_t)(0x0000FFFF & B) * A) >> 16)) + (C + (B >> 16) * A + (((uint32_t)(B & 0x0000FFFF) * A) >> 16)) -#define WEBRTC_SPL_SAT(a, b, c) (b > a ? a : b < c ? c : b) +#define WEBRTC_SPL_SAT(a, b, c) (b > a ? a : b < c ? c : b) // Shifting with negative numbers allowed // Positive means left shift -#define WEBRTC_SPL_SHIFT_W32(x, c) \ - (((c) >= 0) ? ((x) << (c)) : ((x) >> (-(c)))) +#define WEBRTC_SPL_SHIFT_W32(x, c) ((c) >= 0 ? (x) * (1 << (c)) : (x) >> -(c)) // Shifting with negative numbers not allowed // We cannot do casting here due to signed/unsigned problem -#define WEBRTC_SPL_LSHIFT_W32(x, c) ((x) << (c)) +#define WEBRTC_SPL_LSHIFT_W32(x, c) ((x) << (c)) -#define WEBRTC_SPL_RSHIFT_U32(x, c) ((uint32_t)(x) >> (c)) +#define WEBRTC_SPL_RSHIFT_U32(x, c) ((uint32_t)(x) >> (c)) -#define WEBRTC_SPL_RAND(a) \ - ((int16_t)((((int16_t)a * 18816) >> 7) & 0x00007fff)) +#define WEBRTC_SPL_RAND(a) ((int16_t)((((int16_t)a * 18816) >> 7) & 0x00007fff)) #ifdef __cplusplus extern "C" { @@ -102,17 +95,10 @@ extern "C" { memcpy(v1, v2, (length) * sizeof(int16_t)) // inline functions: -#include "webrtc/common_audio/signal_processing/include/spl_inl.h" - -// Initialize SPL. Currently it contains only function pointer initialization. -// If the underlying platform is known to be ARM-Neon (WEBRTC_HAS_NEON defined), -// the pointers will be assigned to code optimized for Neon; otherwise -// if run-time Neon detection (WEBRTC_DETECT_NEON) is enabled, the pointers -// will be assigned to either Neon code or generic C code; otherwise, generic C -// code will be assigned. -// Note that this function MUST be called in any application that uses SPL -// functions. -void WebRtcSpl_Init(); +#include "common_audio/signal_processing/include/spl_inl.h" + +// third party math functions +#include "common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor.h" int16_t WebRtcSpl_GetScalingSquare(int16_t* in_vector, size_t in_vector_length, @@ -133,13 +119,10 @@ void WebRtcSpl_CopyFromEndW16(const int16_t* in_vector, size_t in_vector_length, size_t samples, int16_t* out_vector); -void WebRtcSpl_ZerosArrayW16(int16_t* vector, - size_t vector_length); -void WebRtcSpl_ZerosArrayW32(int32_t* vector, - size_t vector_length); +void WebRtcSpl_ZerosArrayW16(int16_t* vector, size_t vector_length); +void WebRtcSpl_ZerosArrayW32(int32_t* vector, size_t vector_length); // End: Copy and set operations. - // Minimum and maximum operation functions and their pointers. // Implementation in min_max_operations.c. @@ -151,9 +134,9 @@ void WebRtcSpl_ZerosArrayW32(int32_t* vector, // // Return value : Maximum absolute value in vector. typedef int16_t (*MaxAbsValueW16)(const int16_t* vector, size_t length); -extern MaxAbsValueW16 WebRtcSpl_MaxAbsValueW16; +extern const MaxAbsValueW16 WebRtcSpl_MaxAbsValueW16; int16_t WebRtcSpl_MaxAbsValueW16C(const int16_t* vector, size_t length); -#if (defined WEBRTC_DETECT_NEON) || (defined WEBRTC_HAS_NEON) +#if defined(WEBRTC_HAS_NEON) int16_t WebRtcSpl_MaxAbsValueW16Neon(const int16_t* vector, size_t length); #endif #if defined(MIPS32_LE) @@ -168,9 +151,9 @@ int16_t WebRtcSpl_MaxAbsValueW16_mips(const int16_t* vector, size_t length); // // Return value : Maximum absolute value in vector. typedef int32_t (*MaxAbsValueW32)(const int32_t* vector, size_t length); -extern MaxAbsValueW32 WebRtcSpl_MaxAbsValueW32; +extern const MaxAbsValueW32 WebRtcSpl_MaxAbsValueW32; int32_t WebRtcSpl_MaxAbsValueW32C(const int32_t* vector, size_t length); -#if (defined WEBRTC_DETECT_NEON) || (defined WEBRTC_HAS_NEON) +#if defined(WEBRTC_HAS_NEON) int32_t WebRtcSpl_MaxAbsValueW32Neon(const int32_t* vector, size_t length); #endif #if defined(MIPS_DSP_R1_LE) @@ -185,9 +168,9 @@ int32_t WebRtcSpl_MaxAbsValueW32_mips(const int32_t* vector, size_t length); // // Return value : Maximum sample value in |vector|. typedef int16_t (*MaxValueW16)(const int16_t* vector, size_t length); -extern MaxValueW16 WebRtcSpl_MaxValueW16; +extern const MaxValueW16 WebRtcSpl_MaxValueW16; int16_t WebRtcSpl_MaxValueW16C(const int16_t* vector, size_t length); -#if (defined WEBRTC_DETECT_NEON) || (defined WEBRTC_HAS_NEON) +#if defined(WEBRTC_HAS_NEON) int16_t WebRtcSpl_MaxValueW16Neon(const int16_t* vector, size_t length); #endif #if defined(MIPS32_LE) @@ -202,9 +185,9 @@ int16_t WebRtcSpl_MaxValueW16_mips(const int16_t* vector, size_t length); // // Return value : Maximum sample value in |vector|. typedef int32_t (*MaxValueW32)(const int32_t* vector, size_t length); -extern MaxValueW32 WebRtcSpl_MaxValueW32; +extern const MaxValueW32 WebRtcSpl_MaxValueW32; int32_t WebRtcSpl_MaxValueW32C(const int32_t* vector, size_t length); -#if (defined WEBRTC_DETECT_NEON) || (defined WEBRTC_HAS_NEON) +#if defined(WEBRTC_HAS_NEON) int32_t WebRtcSpl_MaxValueW32Neon(const int32_t* vector, size_t length); #endif #if defined(MIPS32_LE) @@ -219,9 +202,9 @@ int32_t WebRtcSpl_MaxValueW32_mips(const int32_t* vector, size_t length); // // Return value : Minimum sample value in |vector|. typedef int16_t (*MinValueW16)(const int16_t* vector, size_t length); -extern MinValueW16 WebRtcSpl_MinValueW16; +extern const MinValueW16 WebRtcSpl_MinValueW16; int16_t WebRtcSpl_MinValueW16C(const int16_t* vector, size_t length); -#if (defined WEBRTC_DETECT_NEON) || (defined WEBRTC_HAS_NEON) +#if defined(WEBRTC_HAS_NEON) int16_t WebRtcSpl_MinValueW16Neon(const int16_t* vector, size_t length); #endif #if defined(MIPS32_LE) @@ -236,9 +219,9 @@ int16_t WebRtcSpl_MinValueW16_mips(const int16_t* vector, size_t length); // // Return value : Minimum sample value in |vector|. typedef int32_t (*MinValueW32)(const int32_t* vector, size_t length); -extern MinValueW32 WebRtcSpl_MinValueW32; +extern const MinValueW32 WebRtcSpl_MinValueW32; int32_t WebRtcSpl_MinValueW32C(const int32_t* vector, size_t length); -#if (defined WEBRTC_DETECT_NEON) || (defined WEBRTC_HAS_NEON) +#if defined(WEBRTC_HAS_NEON) int32_t WebRtcSpl_MinValueW32Neon(const int32_t* vector, size_t length); #endif #if defined(MIPS32_LE) @@ -299,7 +282,6 @@ size_t WebRtcSpl_MinIndexW32(const int32_t* vector, size_t length); // End: Minimum and maximum operations. - // Vector scaling operations. Implementation in vector_scaling_operations.c. // Description at bottom of file. void WebRtcSpl_VectorBitShiftW16(int16_t* out_vector, @@ -325,9 +307,11 @@ void WebRtcSpl_ScaleVectorWithSat(const int16_t* in_vector, size_t vector_length, int16_t right_shifts); void WebRtcSpl_ScaleAndAddVectors(const int16_t* in_vector1, - int16_t gain1, int right_shifts1, + int16_t gain1, + int right_shifts1, const int16_t* in_vector2, - int16_t gain2, int right_shifts2, + int16_t gain2, + int right_shifts2, int16_t* out_vector, size_t vector_length); @@ -346,8 +330,8 @@ void WebRtcSpl_ScaleAndAddVectors(const int16_t* in_vector1, // // Output: // - out_vector : Output vector -// Return value : 0 if OK, -1 if (in_vector1 == NULL -// || in_vector2 == NULL || out_vector == NULL +// Return value : 0 if OK, -1 if (in_vector1 == null +// || in_vector2 == null || out_vector == null // || length <= 0 || right_shift < 0). typedef int (*ScaleAndAddVectorsWithRound)(const int16_t* in_vector1, int16_t in_vector1_scale, @@ -356,7 +340,7 @@ typedef int (*ScaleAndAddVectorsWithRound)(const int16_t* in_vector1, int right_shifts, int16_t* out_vector, size_t length); -extern ScaleAndAddVectorsWithRound WebRtcSpl_ScaleAndAddVectorsWithRound; +extern const ScaleAndAddVectorsWithRound WebRtcSpl_ScaleAndAddVectorsWithRound; int WebRtcSpl_ScaleAndAddVectorsWithRoundC(const int16_t* in_vector1, int16_t in_vector1_scale, const int16_t* in_vector2, @@ -393,13 +377,13 @@ void WebRtcSpl_AddVectorsAndShift(int16_t* out_vector, size_t vector_length, int16_t right_shifts); void WebRtcSpl_AddAffineVectorToVector(int16_t* out_vector, - int16_t* in_vector, + const int16_t* in_vector, int16_t gain, int32_t add_constant, int16_t right_shifts, size_t vector_length); void WebRtcSpl_AffineTransformVector(int16_t* out_vector, - int16_t* in_vector, + const int16_t* in_vector, int16_t gain, int32_t add_constant, int16_t right_shifts, @@ -523,7 +507,7 @@ typedef void (*CrossCorrelation)(int32_t* cross_correlation, size_t dim_cross_correlation, int right_shifts, int step_seq2); -extern CrossCorrelation WebRtcSpl_CrossCorrelation; +extern const CrossCorrelation WebRtcSpl_CrossCorrelation; void WebRtcSpl_CrossCorrelationC(int32_t* cross_correlation, const int16_t* seq1, const int16_t* seq2, @@ -531,7 +515,7 @@ void WebRtcSpl_CrossCorrelationC(int32_t* cross_correlation, size_t dim_cross_correlation, int right_shifts, int step_seq2); -#if (defined WEBRTC_DETECT_NEON) || (defined WEBRTC_HAS_NEON) +#if defined(WEBRTC_HAS_NEON) void WebRtcSpl_CrossCorrelationNeon(int32_t* cross_correlation, const int16_t* seq1, const int16_t* seq2, @@ -585,7 +569,6 @@ int16_t WebRtcSpl_RandUArray(int16_t* vector, // Math functions int32_t WebRtcSpl_Sqrt(int32_t value); -int32_t WebRtcSpl_SqrtFloor(int32_t value); // Divisions. Implementations collected in division_operations.c and // descriptions at bottom of this file. @@ -600,22 +583,6 @@ int32_t WebRtcSpl_Energy(int16_t* vector, size_t vector_length, int* scale_factor); -// Calculates the dot product between two (int16_t) vectors. -// -// Input: -// - vector1 : Vector 1 -// - vector2 : Vector 2 -// - vector_length : Number of samples used in the dot product -// - scaling : The number of right bit shifts to apply on each term -// during calculation to avoid overflow, i.e., the -// output will be in Q(-|scaling|) -// -// Return value : The dot product in Q(-scaling) -int32_t WebRtcSpl_DotProductWithScale(const int16_t* vector1, - const int16_t* vector2, - size_t length, - int scaling); - // Filter operations. size_t WebRtcSpl_FilterAR(const int16_t* ar_coef, size_t ar_coef_length, @@ -689,7 +656,7 @@ typedef int (*DownsampleFast)(const int16_t* data_in, size_t coefficients_length, int factor, size_t delay); -extern DownsampleFast WebRtcSpl_DownsampleFast; +extern const DownsampleFast WebRtcSpl_DownsampleFast; int WebRtcSpl_DownsampleFastC(const int16_t* data_in, size_t data_in_length, int16_t* data_out, @@ -698,7 +665,7 @@ int WebRtcSpl_DownsampleFastC(const int16_t* data_in, size_t coefficients_length, int factor, size_t delay); -#if (defined WEBRTC_DETECT_NEON) || (defined WEBRTC_HAS_NEON) +#if defined(WEBRTC_HAS_NEON) int WebRtcSpl_DownsampleFastNeon(const int16_t* data_in, size_t data_in_length, int16_t* data_out, @@ -795,7 +762,8 @@ typedef struct { int32_t S_16_8[8]; } WebRtcSpl_State22khzTo8khz; -void WebRtcSpl_Resample22khzTo8khz(const int16_t* in, int16_t* out, +void WebRtcSpl_Resample22khzTo8khz(const int16_t* in, + int16_t* out, WebRtcSpl_State22khzTo8khz* state, int32_t* tmpmem); @@ -808,7 +776,8 @@ typedef struct { int32_t S_11_22[8]; } WebRtcSpl_State8khzTo22khz; -void WebRtcSpl_Resample8khzTo22khz(const int16_t* in, int16_t* out, +void WebRtcSpl_Resample8khzTo22khz(const int16_t* in, + int16_t* out, WebRtcSpl_State8khzTo22khz* state, int32_t* tmpmem); @@ -848,7 +817,8 @@ typedef struct { int32_t S_32_16[8]; } WebRtcSpl_State48khzTo16khz; -void WebRtcSpl_Resample48khzTo16khz(const int16_t* in, int16_t* out, +void WebRtcSpl_Resample48khzTo16khz(const int16_t* in, + int16_t* out, WebRtcSpl_State48khzTo16khz* state, int32_t* tmpmem); @@ -860,7 +830,8 @@ typedef struct { int32_t S_24_48[8]; } WebRtcSpl_State16khzTo48khz; -void WebRtcSpl_Resample16khzTo48khz(const int16_t* in, int16_t* out, +void WebRtcSpl_Resample16khzTo48khz(const int16_t* in, + int16_t* out, WebRtcSpl_State16khzTo48khz* state, int32_t* tmpmem); @@ -873,7 +844,8 @@ typedef struct { int32_t S_16_8[8]; } WebRtcSpl_State48khzTo8khz; -void WebRtcSpl_Resample48khzTo8khz(const int16_t* in, int16_t* out, +void WebRtcSpl_Resample48khzTo8khz(const int16_t* in, + int16_t* out, WebRtcSpl_State48khzTo8khz* state, int32_t* tmpmem); @@ -886,7 +858,8 @@ typedef struct { int32_t S_24_48[8]; } WebRtcSpl_State8khzTo48khz; -void WebRtcSpl_Resample8khzTo48khz(const int16_t* in, int16_t* out, +void WebRtcSpl_Resample8khzTo48khz(const int16_t* in, + int16_t* out, WebRtcSpl_State8khzTo48khz* state, int32_t* tmpmem); @@ -899,11 +872,15 @@ void WebRtcSpl_ResetResample8khzTo48khz(WebRtcSpl_State8khzTo48khz* state); * ******************************************************************/ -void WebRtcSpl_DownsampleBy2(const int16_t* in, size_t len, - int16_t* out, int32_t* filtState); +void WebRtcSpl_DownsampleBy2(const int16_t* in, + size_t len, + int16_t* out, + int32_t* filtState); -void WebRtcSpl_UpsampleBy2(const int16_t* in, size_t len, - int16_t* out, int32_t* filtState); +void WebRtcSpl_UpsampleBy2(const int16_t* in, + size_t len, + int16_t* out, + int32_t* filtState); /************************************************************ * END OF RESAMPLING FUNCTIONS @@ -924,7 +901,7 @@ void WebRtcSpl_SynthesisQMF(const int16_t* low_band, #ifdef __cplusplus } #endif // __cplusplus -#endif // WEBRTC_SPL_SIGNAL_PROCESSING_LIBRARY_H_ +#endif // COMMON_AUDIO_SIGNAL_PROCESSING_INCLUDE_SIGNAL_PROCESSING_LIBRARY_H_ // // WebRtcSpl_AddSatW16(...) @@ -1353,23 +1330,6 @@ void WebRtcSpl_SynthesisQMF(const int16_t* low_band, // // -// WebRtcSpl_SqrtFloor(...) -// -// Returns the square root of the input value |value|. The precision of this -// function is rounding down integer precision, i.e., sqrt(8) gives 2 as answer. -// If |value| is a negative number then 0 is returned. -// -// Algorithm: -// -// An iterative 4 cylce/bit routine -// -// Input: -// - value : Value to calculate sqrt of -// -// Return value : Result of the sqrt calculation -// - -// // WebRtcSpl_DivU32U16(...) // // Divides a uint32_t |num| by a uint16_t |den|. |