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-rw-r--r--chromium/third_party/webrtc/modules/audio_coding/neteq/dtmf_tonegen.c367
1 files changed, 0 insertions, 367 deletions
diff --git a/chromium/third_party/webrtc/modules/audio_coding/neteq/dtmf_tonegen.c b/chromium/third_party/webrtc/modules/audio_coding/neteq/dtmf_tonegen.c
deleted file mode 100644
index 8ea413c76f1..00000000000
--- a/chromium/third_party/webrtc/modules/audio_coding/neteq/dtmf_tonegen.c
+++ /dev/null
@@ -1,367 +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 the DTMF tone generator and its parameters.
- *
- * A sinusoid is generated using the recursive oscillator model
- *
- * y[n] = sin(w*n + phi) = 2*cos(w) * y[n-1] - y[n-2]
- * = a * y[n-1] - y[n-2]
- *
- * initialized with
- * y[-2] = 0
- * y[-1] = sin(w)
- *
- * A DTMF signal is a combination of two sinusoids, depending
- * on which event is sent (i.e, which key is pressed). The following
- * table maps each key (event codes in parentheses) into two tones:
- *
- * 1209 Hz 1336 Hz 1477 Hz 1633 Hz
- * 697 Hz 1 (ev. 1) 2 (ev. 2) 3 (ev. 3) A (ev. 12)
- * 770 Hz 4 (ev. 4) 5 (ev. 5) 6 (ev. 6) B (ev. 13)
- * 852 Hz 7 (ev. 7) 8 (ev. 8) 9 (ev. 9) C (ev. 14)
- * 941 Hz * (ev. 10) 0 (ev. 0) # (ev. 11) D (ev. 15)
- *
- * The two tones are added to form the DTMF signal.
- *
- */
-
-#include "dtmf_tonegen.h"
-
-#include "signal_processing_library.h"
-
-#include "neteq_error_codes.h"
-
-#ifdef NETEQ_ATEVENT_DECODE
-/* Must compile NetEQ with DTMF support to enable the functionality */
-
-/*******************/
-/* Constant tables */
-/*******************/
-
-/*
- * All tables corresponding to the oscillator model are organized so that
- * the coefficients for a specific frequency is found in the same position
- * in every table. The positions for the tones follow this layout:
- *
- * dummyVector[8] =
- * {
- * 697 Hz, 770 Hz, 852 Hz, 941 Hz,
- * 1209 Hz, 1336 Hz, 1477 Hz, 1633 Hz
- * };
- */
-
-/*
- * Tables for the constant a = 2*cos(w) = 2*cos(2*pi*f/fs)
- * in the oscillator model, for 8, 16, 32 and 48 kHz sample rate.
- * Table values in Q14.
- */
-
-const int16_t WebRtcNetEQ_dtfm_aTbl8Khz[8] =
-{
- 27980, 26956, 25701, 24219,
- 19073, 16325, 13085, 9315
-};
-
-#ifdef NETEQ_WIDEBAND
-const int16_t WebRtcNetEQ_dtfm_aTbl16Khz[8]=
-{
- 31548, 31281, 30951, 30556,
- 29144, 28361, 27409, 26258
-};
-#endif
-
-#ifdef NETEQ_32KHZ_WIDEBAND
-const int16_t WebRtcNetEQ_dtfm_aTbl32Khz[8]=
-{
- 32462, 32394, 32311, 32210,
- 31849, 31647, 31400, 31098
-};
-#endif
-
-#ifdef NETEQ_48KHZ_WIDEBAND
-const int16_t WebRtcNetEQ_dtfm_aTbl48Khz[8]=
-{
- 32632, 32602, 32564, 32520,
- 32359, 32268, 32157, 32022
-};
-#endif
-
-/*
- * Initialization values y[-1] = sin(w) = sin(2*pi*f/fs), for 8, 16, 32 and 48 kHz sample rate.
- * Table values in Q14.
- */
-
-const int16_t WebRtcNetEQ_dtfm_yInitTab8Khz[8] =
-{
- 8528, 9315, 10163, 11036,
- 13323, 14206,15021, 15708
-};
-
-#ifdef NETEQ_WIDEBAND
-const int16_t WebRtcNetEQ_dtfm_yInitTab16Khz[8]=
-{
- 4429, 4879, 5380, 5918,
- 7490, 8207, 8979, 9801
-};
-#endif
-
-#ifdef NETEQ_32KHZ_WIDEBAND
-const int16_t WebRtcNetEQ_dtfm_yInitTab32Khz[8]=
-{
- 2235, 2468, 2728, 3010,
- 3853, 4249, 4685, 5164
-};
-#endif
-
-#ifdef NETEQ_48KHZ_WIDEBAND
-const int16_t WebRtcNetEQ_dtfm_yInitTab48Khz[8]=
-{
- 1493, 1649, 1823, 2013,
- 2582, 2851, 3148, 3476
-};
-#endif
-
-/* Volume in dBm0 from 0 to -63, where 0 is the first table entry.
- Everything below -36 is discarded, wherefore the table stops at -36.
- Table entries are in Q14.
- */
-
-const int16_t WebRtcNetEQ_dtfm_dBm0[37] = { 16141, 14386, 12821, 11427, 10184, 9077, 8090,
- 7210, 6426, 5727, 5104, 4549, 4054, 3614,
- 3221, 2870, 2558, 2280, 2032, 1811, 1614,
- 1439, 1282, 1143, 1018, 908, 809, 721, 643,
- 573, 510, 455, 405, 361, 322, 287, 256 };
-
-/****************************************************************************
- * WebRtcNetEQ_DTMFGenerate(...)
- *
- * Generate 10 ms DTMF signal according to input parameters.
- *
- * Input:
- * - DTMFdecInst : DTMF instance
- * - value : DTMF event number (0-15)
- * - volume : Volume of generated signal (0-36)
- * Volume is given in negative dBm0, i.e., volume == 0
- * means 0 dBm0 while volume == 36 mean -36 dBm0.
- * - sampFreq : Sample rate in Hz
- *
- * Output:
- * - signal : Pointer to vector where DTMF signal is stored;
- * Vector must be at least sampFreq/100 samples long.
- * - DTMFdecInst : Updated DTMF instance
- *
- * Return value : >0 - Number of samples written to signal
- * : <0 - error
- */
-
-int16_t WebRtcNetEQ_DTMFGenerate(dtmf_tone_inst_t *DTMFdecInst, int16_t value,
- int16_t volume, int16_t *signal,
- uint16_t sampFreq, int16_t extFrameLen)
-{
- const int16_t *aTbl; /* pointer to a-coefficient table */
- const int16_t *yInitTable; /* pointer to initialization value table */
- int16_t a1 = 0; /* a-coefficient for first tone (low tone) */
- int16_t a2 = 0; /* a-coefficient for second tone (high tone) */
- int i;
- int frameLen; /* number of samples to generate */
- int lowIndex = 0; /* Default to avoid compiler warnings. */
- int highIndex = 4; /* Default to avoid compiler warnings. */
- int32_t tempVal;
- int16_t tempValLow;
- int16_t tempValHigh;
-
- /* Sanity check for volume */
- if ((volume < 0) || (volume > 36))
- {
- return DTMF_DEC_PARAMETER_ERROR;
- }
-
- /* Sanity check for extFrameLen */
- if (extFrameLen < -1)
- {
- return DTMF_DEC_PARAMETER_ERROR;
- }
-
- /* Select oscillator coefficient tables based on sample rate */
- if (sampFreq == 8000)
- {
- aTbl = WebRtcNetEQ_dtfm_aTbl8Khz;
- yInitTable = WebRtcNetEQ_dtfm_yInitTab8Khz;
- frameLen = 80;
-#ifdef NETEQ_WIDEBAND
- }
- else if (sampFreq == 16000)
- {
- aTbl = WebRtcNetEQ_dtfm_aTbl16Khz;
- yInitTable = WebRtcNetEQ_dtfm_yInitTab16Khz;
- frameLen = 160;
-#endif
-#ifdef NETEQ_32KHZ_WIDEBAND
- }
- else if (sampFreq == 32000)
- {
- aTbl = WebRtcNetEQ_dtfm_aTbl32Khz;
- yInitTable = WebRtcNetEQ_dtfm_yInitTab32Khz;
- frameLen = 320;
-#endif
-#ifdef NETEQ_48KHZ_WIDEBAND
- }
- else if (sampFreq == 48000)
- {
- aTbl = WebRtcNetEQ_dtfm_aTbl48Khz;
- yInitTable = WebRtcNetEQ_dtfm_yInitTab48Khz;
- frameLen = 480;
-#endif
- }
- else
- {
- /* unsupported sample rate */
- return DTMF_GEN_UNKNOWN_SAMP_FREQ;
- }
-
- if (extFrameLen >= 0)
- {
- frameLen = extFrameLen;
- }
-
- /* select low frequency based on event value */
- switch (value)
- {
- case 1:
- case 2:
- case 3:
- case 12: /* first row on keypad */
- {
- lowIndex = 0; /* low frequency: 697 Hz */
- break;
- }
- case 4:
- case 5:
- case 6:
- case 13: /* second row on keypad */
- {
- lowIndex = 1; /* low frequency: 770 Hz */
- break;
- }
- case 7:
- case 8:
- case 9:
- case 14: /* third row on keypad */
- {
- lowIndex = 2; /* low frequency: 852 Hz */
- break;
- }
- case 0:
- case 10:
- case 11:
- case 15: /* fourth row on keypad */
- {
- lowIndex = 3; /* low frequency: 941 Hz */
- break;
- }
- default:
- {
- return DTMF_DEC_PARAMETER_ERROR;
- }
- } /* end switch */
-
- /* select high frequency based on event value */
- switch (value)
- {
- case 1:
- case 4:
- case 7:
- case 10: /* first column on keypad */
- {
- highIndex = 4; /* high frequency: 1209 Hz */
- break;
- }
- case 2:
- case 5:
- case 8:
- case 0: /* second column on keypad */
- {
- highIndex = 5;/* high frequency: 1336 Hz */
- break;
- }
- case 3:
- case 6:
- case 9:
- case 11: /* third column on keypad */
- {
- highIndex = 6;/* high frequency: 1477 Hz */
- break;
- }
- case 12:
- case 13:
- case 14:
- case 15: /* fourth column on keypad (special) */
- {
- highIndex = 7;/* high frequency: 1633 Hz */
- break;
- }
- } /* end switch */
-
- /* select coefficients based on results from switches above */
- a1 = aTbl[lowIndex]; /* coefficient for first (low) tone */
- a2 = aTbl[highIndex]; /* coefficient for second (high) tone */
-
- if (DTMFdecInst->reinit)
- {
- /* set initial values for the recursive model */
- DTMFdecInst->oldOutputLow[0] = yInitTable[lowIndex];
- DTMFdecInst->oldOutputLow[1] = 0;
- DTMFdecInst->oldOutputHigh[0] = yInitTable[highIndex];
- DTMFdecInst->oldOutputHigh[1] = 0;
-
- /* reset reinit flag */
- DTMFdecInst->reinit = 0;
- }
-
- /* generate signal sample by sample */
- for (i = 0; i < frameLen; i++)
- {
-
- /* Use rescursion formula y[n] = a*y[n-1] - y[n-2] */
- tempValLow
- = (int16_t) (((WEBRTC_SPL_MUL_16_16(a1, DTMFdecInst->oldOutputLow[1])
- + 8192) >> 14) - DTMFdecInst->oldOutputLow[0]);
- tempValHigh
- = (int16_t) (((WEBRTC_SPL_MUL_16_16(a2, DTMFdecInst->oldOutputHigh[1])
- + 8192) >> 14) - DTMFdecInst->oldOutputHigh[0]);
-
- /* Update recursion memory */
- DTMFdecInst->oldOutputLow[0] = DTMFdecInst->oldOutputLow[1];
- DTMFdecInst->oldOutputLow[1] = tempValLow;
- DTMFdecInst->oldOutputHigh[0] = DTMFdecInst->oldOutputHigh[1];
- DTMFdecInst->oldOutputHigh[1] = tempValHigh;
-
- /* scale high tone with 32768 (15 left shifts)
- and low tone with 23171 (3dB lower than high tone) */
- tempVal = WEBRTC_SPL_MUL_16_16(DTMF_AMP_LOW, tempValLow)
- + WEBRTC_SPL_LSHIFT_W32((int32_t)tempValHigh, 15);
-
- /* Norm the signal to Q14 (with proper rounding) */
- tempVal = (tempVal + 16384) >> 15;
-
- /* Scale the signal to correct dbM0 value */
- signal[i] = (int16_t) WEBRTC_SPL_RSHIFT_W32(
- (WEBRTC_SPL_MUL_16_16(tempVal, WebRtcNetEQ_dtfm_dBm0[volume])
- + 8192), 14); /* volume value is in Q14; use proper rounding */
- }
-
- return frameLen;
-
-}
-
-#endif /* NETEQ_ATEVENT_DECODE */
-
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