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https://github.com/Swiftgram/Telegram-iOS.git
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5caaaafa42
I'm now using the entire audio processing module from WebRTC as opposed to individual DSP algorithms pulled from there before. Seems to work better this way.
134 lines
4.5 KiB
C
134 lines
4.5 KiB
C
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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/* The global function contained in this file initializes SPL function
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* pointers, currently only for ARM platforms.
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*
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* Some code came from common/rtcd.c in the WebM project.
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*/
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#include "common_audio/signal_processing/include/signal_processing_library.h"
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#include "system_wrappers/include/cpu_features_wrapper.h"
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/* Declare function pointers. */
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MaxAbsValueW16 WebRtcSpl_MaxAbsValueW16;
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MaxAbsValueW32 WebRtcSpl_MaxAbsValueW32;
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MaxValueW16 WebRtcSpl_MaxValueW16;
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MaxValueW32 WebRtcSpl_MaxValueW32;
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MinValueW16 WebRtcSpl_MinValueW16;
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MinValueW32 WebRtcSpl_MinValueW32;
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CrossCorrelation WebRtcSpl_CrossCorrelation;
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DownsampleFast WebRtcSpl_DownsampleFast;
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ScaleAndAddVectorsWithRound WebRtcSpl_ScaleAndAddVectorsWithRound;
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#if (!defined(WEBRTC_HAS_NEON)) && !defined(MIPS32_LE)
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/* Initialize function pointers to the generic C version. */
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static void InitPointersToC(void) {
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WebRtcSpl_MaxAbsValueW16 = WebRtcSpl_MaxAbsValueW16C;
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WebRtcSpl_MaxAbsValueW32 = WebRtcSpl_MaxAbsValueW32C;
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WebRtcSpl_MaxValueW16 = WebRtcSpl_MaxValueW16C;
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WebRtcSpl_MaxValueW32 = WebRtcSpl_MaxValueW32C;
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WebRtcSpl_MinValueW16 = WebRtcSpl_MinValueW16C;
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WebRtcSpl_MinValueW32 = WebRtcSpl_MinValueW32C;
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WebRtcSpl_CrossCorrelation = WebRtcSpl_CrossCorrelationC;
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WebRtcSpl_DownsampleFast = WebRtcSpl_DownsampleFastC;
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WebRtcSpl_ScaleAndAddVectorsWithRound =
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WebRtcSpl_ScaleAndAddVectorsWithRoundC;
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}
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#endif
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#if defined(WEBRTC_HAS_NEON)
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/* Initialize function pointers to the Neon version. */
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static void InitPointersToNeon(void) {
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WebRtcSpl_MaxAbsValueW16 = WebRtcSpl_MaxAbsValueW16Neon;
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WebRtcSpl_MaxAbsValueW32 = WebRtcSpl_MaxAbsValueW32Neon;
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WebRtcSpl_MaxValueW16 = WebRtcSpl_MaxValueW16Neon;
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WebRtcSpl_MaxValueW32 = WebRtcSpl_MaxValueW32Neon;
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WebRtcSpl_MinValueW16 = WebRtcSpl_MinValueW16Neon;
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WebRtcSpl_MinValueW32 = WebRtcSpl_MinValueW32Neon;
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WebRtcSpl_CrossCorrelation = WebRtcSpl_CrossCorrelationNeon;
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WebRtcSpl_DownsampleFast = WebRtcSpl_DownsampleFastNeon;
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WebRtcSpl_ScaleAndAddVectorsWithRound =
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WebRtcSpl_ScaleAndAddVectorsWithRoundC;
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}
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#endif
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#if defined(MIPS32_LE)
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/* Initialize function pointers to the MIPS version. */
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static void InitPointersToMIPS(void) {
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WebRtcSpl_MaxAbsValueW16 = WebRtcSpl_MaxAbsValueW16_mips;
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WebRtcSpl_MaxValueW16 = WebRtcSpl_MaxValueW16_mips;
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WebRtcSpl_MaxValueW32 = WebRtcSpl_MaxValueW32_mips;
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WebRtcSpl_MinValueW16 = WebRtcSpl_MinValueW16_mips;
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WebRtcSpl_MinValueW32 = WebRtcSpl_MinValueW32_mips;
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WebRtcSpl_CrossCorrelation = WebRtcSpl_CrossCorrelation_mips;
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WebRtcSpl_DownsampleFast = WebRtcSpl_DownsampleFast_mips;
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#if defined(MIPS_DSP_R1_LE)
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WebRtcSpl_MaxAbsValueW32 = WebRtcSpl_MaxAbsValueW32_mips;
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WebRtcSpl_ScaleAndAddVectorsWithRound =
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WebRtcSpl_ScaleAndAddVectorsWithRound_mips;
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#else
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WebRtcSpl_MaxAbsValueW32 = WebRtcSpl_MaxAbsValueW32C;
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WebRtcSpl_ScaleAndAddVectorsWithRound =
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WebRtcSpl_ScaleAndAddVectorsWithRoundC;
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#endif
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}
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#endif
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static void InitFunctionPointers(void) {
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#if defined(WEBRTC_HAS_NEON)
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InitPointersToNeon();
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#elif defined(MIPS32_LE)
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InitPointersToMIPS();
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#else
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InitPointersToC();
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#endif /* WEBRTC_HAS_NEON */
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}
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#if defined(WEBRTC_POSIX)
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#include <pthread.h>
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static void once(void (*func)(void)) {
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static pthread_once_t lock = PTHREAD_ONCE_INIT;
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pthread_once(&lock, func);
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}
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#elif defined(_WIN32)
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#include <windows.h>
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static void once(void (*func)(void)) {
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/* Didn't use InitializeCriticalSection() since there's no race-free context
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* in which to execute it.
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*
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* TODO(kma): Change to different implementation (e.g.
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* InterlockedCompareExchangePointer) to avoid issues similar to
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* http://code.google.com/p/webm/issues/detail?id=467.
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*/
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static CRITICAL_SECTION lock = {(void *)((size_t)-1), -1, 0, 0, 0, 0};
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static int done = 0;
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EnterCriticalSection(&lock);
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if (!done) {
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func();
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done = 1;
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}
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LeaveCriticalSection(&lock);
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}
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/* There's no fallback version as an #else block here to ensure thread safety.
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* In case of neither pthread for WEBRTC_POSIX nor _WIN32 is present, build
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* system should pick it up.
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*/
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#endif /* WEBRTC_POSIX */
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void WebRtcSpl_Init(void) {
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once(InitFunctionPointers);
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}
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