diff options
Diffstat (limited to 'chromium/third_party/webrtc/modules/audio_coding/neteq/dsp_helpfunctions.c')
-rw-r--r-- | chromium/third_party/webrtc/modules/audio_coding/neteq/dsp_helpfunctions.c | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/chromium/third_party/webrtc/modules/audio_coding/neteq/dsp_helpfunctions.c b/chromium/third_party/webrtc/modules/audio_coding/neteq/dsp_helpfunctions.c deleted file mode 100644 index ef721d55997..00000000000 --- a/chromium/third_party/webrtc/modules/audio_coding/neteq/dsp_helpfunctions.c +++ /dev/null @@ -1,120 +0,0 @@ -/* - * 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 some help functions that did not fit elsewhere. - */ - -#include "dsp_helpfunctions.h" - - -int16_t WebRtcNetEQ_CalcFsMult(uint16_t fsHz) -{ - switch (fsHz) - { - case 8000: - { - return 1; - } - case 16000: - { - return 2; - } - case 32000: - { - return 4; - } - case 48000: - { - return 6; - } - default: - { - return 1; - } - } -} - - -int WebRtcNetEQ_DownSampleTo4kHz(const int16_t *in, int inLen, uint16_t inFsHz, - int16_t *out, int outLen, int compensateDelay) -{ - int16_t *B; /* filter coefficients */ - int16_t Blen; /* number of coefficients */ - int16_t filterDelay; /* phase delay in samples */ - int16_t factor; /* conversion rate (inFsHz/8000) */ - int ok; - - /* Set constants depending on frequency used */ - /* NOTE: The phase delay values are wrong compared to the true phase delay - of the filters. However, the error is preserved (through the +1 term) - for consistency. */ - switch (inFsHz) - { - case 8000: - { - Blen = 3; - factor = 2; - B = (int16_t*) WebRtcNetEQ_kDownsample8kHzTbl; - filterDelay = 1 + 1; - break; - } -#ifdef NETEQ_WIDEBAND - case 16000: - { - Blen = 5; - factor = 4; - B = (int16_t*) WebRtcNetEQ_kDownsample16kHzTbl; - filterDelay = 2 + 1; - break; - } -#endif -#ifdef NETEQ_32KHZ_WIDEBAND - case 32000: - { - Blen = 7; - factor = 8; - B = (int16_t*) WebRtcNetEQ_kDownsample32kHzTbl; - filterDelay = 3 + 1; - break; - } -#endif -#ifdef NETEQ_48KHZ_WIDEBAND - case 48000: - { - Blen = 7; - factor = 12; - B = (int16_t*) WebRtcNetEQ_kDownsample48kHzTbl; - filterDelay = 3 + 1; - break; - } -#endif - default: - { - /* unsupported or wrong sample rate */ - return -1; - } - } - - if (!compensateDelay) - { - /* disregard delay compensation */ - filterDelay = 0; - } - - ok = WebRtcSpl_DownsampleFast((int16_t*) &in[Blen - 1], - (int16_t) (inLen - (Blen - 1)), /* number of input samples */ - out, (int16_t) outLen, /* number of output samples to produce */ - B, Blen, factor, filterDelay); /* filter parameters */ - - return ok; /* return value is -1 if input signal is too short */ - -} - |