| /* |
| * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| |
| /* |
| * This file contains the function WebRtcSpl_FilterMAFastQ12(). |
| * The description header can be found in signal_processing_library.h |
| * |
| */ |
| |
| #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h" |
| |
| #include "webrtc/rtc_base/sanitizer.h" |
| |
| void WebRtcSpl_FilterMAFastQ12(const int16_t* in_ptr, |
| int16_t* out_ptr, |
| const int16_t* B, |
| size_t B_length, |
| size_t length) |
| { |
| size_t i, j; |
| |
| rtc_MsanCheckInitialized(B, sizeof(B[0]), B_length); |
| rtc_MsanCheckInitialized(in_ptr - B_length + 1, sizeof(in_ptr[0]), |
| B_length + length - 1); |
| |
| for (i = 0; i < length; i++) |
| { |
| int32_t o = 0; |
| |
| for (j = 0; j < B_length; j++) |
| { |
| o += B[j] * in_ptr[i - j]; |
| } |
| |
| // If output is higher than 32768, saturate it. Same with negative side |
| // 2^27 = 134217728, which corresponds to 32768 in Q12 |
| |
| // Saturate the output |
| o = WEBRTC_SPL_SAT((int32_t)134215679, o, (int32_t)-134217728); |
| |
| *out_ptr++ = (int16_t)((o + (int32_t)2048) >> 12); |
| } |
| return; |
| } |