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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2477 b3059339-0415-0410-9bf9-f77b7e298cf2
998 lines
28 KiB
C
998 lines
28 KiB
C
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/*
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Written by Mark Podlipec <podlipec@ici.net>.
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Most of this code comes from a GSM 06.10 library by
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Jutta Degener and Carsten Bormann, available via
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<http://www.pobox.com/~jutta/toast.html>.
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That library is distributed with the following copyright:
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Copyright 1992 by Jutta Degener and Carsten Bormann,
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Technische Universitaet Berlin
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Any use of this software is permitted provided that this notice is not
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removed and that neither the authors nor the Technische Universitaet Berlin
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are deemed to have made any representations as to the suitability of this
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software for any purpose nor are held responsible for any defects of
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this software. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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As a matter of courtesy, the authors request to be informed about uses
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this software has found, about bugs in this software, and about any
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improvements that may be of general interest.
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Berlin, 15.09.1992
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Jutta Degener
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Carsten Bormann
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*/
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#include <stdio.h>
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#include <string.h>
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#include <assert.h> /* POD optional */
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#include "xa_gsm_int.h"
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//void XA_MSGSM_Decoder();
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static void GSM_Decode();
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static void Gsm_RPE_Decoding();
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//static short gsm_buf[320];
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static XA_GSM_STATE gsm_state;
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unsigned char xa_sign_2_ulaw[256];
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unsigned char XA_Signed_To_uLaw(long ch)
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{
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long mask;
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if (ch < 0) { ch = -ch; mask = 0x7f; }
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else { mask = 0xff; }
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if (ch < 32) { ch = 0xF0 | (15 - (ch / 2)); }
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else if (ch < 96) { ch = 0xE0 | (15 - (ch - 32) / 4); }
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else if (ch < 224) { ch = 0xD0 | (15 - (ch - 96) / 8); }
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else if (ch < 480) { ch = 0xC0 | (15 - (ch - 224) / 16); }
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else if (ch < 992) { ch = 0xB0 | (15 - (ch - 480) / 32); }
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else if (ch < 2016) { ch = 0xA0 | (15 - (ch - 992) / 64); }
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else if (ch < 4064) { ch = 0x90 | (15 - (ch - 2016) / 128); }
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else if (ch < 8160) { ch = 0x80 | (15 - (ch - 4064) / 256); }
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else { ch = 0x80; }
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return (mask & ch);
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}
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void Gen_Signed_2_uLaw()
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{
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unsigned long i;
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for(i=0;i<256;i++)
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{ unsigned char d;
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char ch = i;
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long chr = ch;
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d = XA_Signed_To_uLaw(chr * 16);
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xa_sign_2_ulaw[i] = d;
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}
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}
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void GSM_Init()
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{
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memset((char *)(&gsm_state), 0, sizeof(XA_GSM_STATE));
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gsm_state.nrp = 40;
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Gen_Signed_2_uLaw();
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}
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/* Table 4.3b Quantization levels of the LTP gain quantizer
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*/
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/* bc 0 1 2 3 */
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static word gsm_QLB[4] = { 3277, 11469, 21299, 32767 };
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/* Table 4.6 Normalized direct mantissa used to compute xM/xmax
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*/
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/* i 0 1 2 3 4 5 6 7 */
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static word gsm_FAC[8] = { 18431, 20479, 22527, 24575, 26623, 28671, 30719, 32767 };
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/****************/
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#define saturate(x) \
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((x) < MIN_WORD ? MIN_WORD : (x) > MAX_WORD ? MAX_WORD: (x))
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/****************/
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static word gsm_sub (a,b)
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word a;
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word b;
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{
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longword diff = (longword)a - (longword)b;
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return saturate(diff);
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}
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/****************/
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static word gsm_asr (a,n)
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word a;
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int n;
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{
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if (n >= 16) return -(a < 0);
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if (n <= -16) return 0;
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if (n < 0) return a << -n;
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# ifdef SASR
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return a >> n;
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# else
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if (a >= 0) return a >> n;
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else return -(word)( -(uword)a >> n );
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# endif
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}
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/****************/
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static word gsm_asl (a,n)
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word a;
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int n;
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{
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if (n >= 16) return 0;
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if (n <= -16) return -(a < 0);
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if (n < 0) return gsm_asr(a, -n);
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return a << n;
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}
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/*
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* Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
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* Universitaet Berlin. See the accompanying file "COPYRIGHT" for
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* details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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*/
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/**** 4.2.17 */
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static void RPE_grid_positioning(Mc,xMp,ep)
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word Mc; /* grid position IN */
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register word * xMp; /* [0..12] IN */
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register word * ep; /* [0..39] OUT */
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/*
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* This procedure computes the reconstructed long term residual signal
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* ep[0..39] for the LTP analysis filter. The inputs are the Mc
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* which is the grid position selection and the xMp[0..12] decoded
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* RPE samples which are upsampled by a factor of 3 by inserting zero
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* values.
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*/
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{
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int i = 13;
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assert(0 <= Mc && Mc <= 3);
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switch (Mc) {
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case 3: *ep++ = 0;
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case 2: do {
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*ep++ = 0;
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case 1: *ep++ = 0;
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case 0: *ep++ = *xMp++;
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} while (--i);
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}
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while (++Mc < 4) *ep++ = 0;
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/*
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int i, k;
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for (k = 0; k <= 39; k++) ep[k] = 0;
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for (i = 0; i <= 12; i++) {
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ep[ Mc + (3*i) ] = xMp[i];
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}
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*/
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}
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/**** 4.2.16 */
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static void APCM_inverse_quantization (xMc,mant,exp,xMp)
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register word * xMc; /* [0..12] IN */
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word mant;
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word exp;
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register word * xMp; /* [0..12] OUT */
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/*
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* This part is for decoding the RPE sequence of coded xMc[0..12]
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* samples to obtain the xMp[0..12] array. Table 4.6 is used to get
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* the mantissa of xmaxc (FAC[0..7]).
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*/
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{
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int i;
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word temp, temp1, temp2, temp3;
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longword ltmp;
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assert( mant >= 0 && mant <= 7 );
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temp1 = gsm_FAC[ mant ]; /* see 4.2-15 for mant */
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temp2 = gsm_sub( 6, exp ); /* see 4.2-15 for exp */
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temp3 = gsm_asl( 1, gsm_sub( temp2, 1 ));
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for (i = 13; i--;) {
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assert( *xMc <= 7 && *xMc >= 0 ); /* 3 bit unsigned */
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/* temp = gsm_sub( *xMc++ << 1, 7 ); */
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temp = (*xMc++ << 1) - 7; /* restore sign */
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assert( temp <= 7 && temp >= -7 ); /* 4 bit signed */
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temp <<= 12; /* 16 bit signed */
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temp = GSM_MULT_R( temp1, temp );
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temp = GSM_ADD( temp, temp3 );
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*xMp++ = gsm_asr( temp, temp2 );
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}
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}
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/**** 4.12.15 */
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static void APCM_quantization_xmaxc_to_exp_mant (xmaxc,exp_out,mant_out)
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word xmaxc; /* IN */
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word * exp_out; /* OUT */
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word * mant_out; /* OUT */
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{
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word exp, mant;
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/* Compute exponent and mantissa of the decoded version of xmaxc
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*/
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exp = 0;
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if (xmaxc > 15) exp = SASR(xmaxc, 3) - 1;
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mant = xmaxc - (exp << 3);
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if (mant == 0) {
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exp = -4;
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mant = 7;
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}
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else {
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while (mant <= 7) {
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mant = mant << 1 | 1;
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exp--;
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}
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mant -= 8;
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}
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assert( exp >= -4 && exp <= 6 );
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assert( mant >= 0 && mant <= 7 );
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*exp_out = exp;
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*mant_out = mant;
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}
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static void Gsm_RPE_Decoding (S, xmaxcr, Mcr, xMcr, erp)
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XA_GSM_STATE * S;
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word xmaxcr;
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word Mcr;
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word * xMcr; /* [0..12], 3 bits IN */
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word * erp; /* [0..39] OUT */
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{
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word exp, mant;
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word xMp[ 13 ];
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APCM_quantization_xmaxc_to_exp_mant( xmaxcr, &exp, &mant );
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APCM_inverse_quantization( xMcr, mant, exp, xMp );
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RPE_grid_positioning( Mcr, xMp, erp );
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}
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/*
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* 4.3 FIXED POINT IMPLEMENTATION OF THE RPE-LTP DECODER
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*/
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static void Postprocessing(S,s)
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XA_GSM_STATE * S;
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register word * s;
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{
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register int k;
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register word msr = S->msr;
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register longword ltmp; /* for GSM_ADD */
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register word tmp;
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for (k = 160; k--; s++)
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{
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tmp = GSM_MULT_R( msr, 28180 );
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msr = GSM_ADD(*s, tmp); /* Deemphasis */
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*s = GSM_ADD(msr, msr) & 0xFFF8; /* Truncation & Upscaling */
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}
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S->msr = msr;
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}
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/**** 4.3.2 */
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void Gsm_Long_Term_Synthesis_Filtering (S,Ncr,bcr,erp,drp)
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XA_GSM_STATE * S;
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word Ncr;
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word bcr;
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register word * erp; /* [0..39] IN */
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register word * drp; /* [-120..-1] IN, [-120..40] OUT */
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/*
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* This procedure uses the bcr and Ncr parameter to realize the
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* long term synthesis filtering. The decoding of bcr needs
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* table 4.3b.
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*/
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{
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register longword ltmp; /* for ADD */
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register int k;
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word brp, drpp, Nr;
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/* Check the limits of Nr.
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*/
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Nr = Ncr < 40 || Ncr > 120 ? S->nrp : Ncr;
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S->nrp = Nr;
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assert(Nr >= 40 && Nr <= 120);
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/* Decoding of the LTP gain bcr
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*/
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brp = gsm_QLB[ bcr ];
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/* Computation of the reconstructed short term residual
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* signal drp[0..39]
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*/
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assert(brp != MIN_WORD);
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for (k = 0; k <= 39; k++) {
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drpp = GSM_MULT_R( brp, drp[ k - Nr ] );
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drp[k] = GSM_ADD( erp[k], drpp );
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}
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/*
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* Update of the reconstructed short term residual signal
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* drp[ -1..-120 ]
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*/
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for (k = 0; k <= 119; k++) drp[ -120 + k ] = drp[ -80 + k ];
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}
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static void Short_term_synthesis_filtering (S,rrp,k,wt,sr)
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XA_GSM_STATE *S;
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register word *rrp; /* [0..7] IN */
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register int k; /* k_end - k_start */
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register word *wt; /* [0..k-1] IN */
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register word *sr; /* [0..k-1] OUT */
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{
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register word * v = S->v;
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register int i;
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register word sri, tmp1, tmp2;
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register longword ltmp; /* for GSM_ADD & GSM_SUB */
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while (k--) {
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sri = *wt++;
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for (i = 8; i--;) {
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/* sri = GSM_SUB( sri, gsm_mult_r( rrp[i], v[i] ) );
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*/
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tmp1 = rrp[i];
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tmp2 = v[i];
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tmp2 = ( tmp1 == MIN_WORD && tmp2 == MIN_WORD
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? MAX_WORD
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: 0x0FFFF & (( (longword)tmp1 * (longword)tmp2
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+ 16384) >> 15)) ;
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sri = GSM_SUB( sri, tmp2 );
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/* v[i+1] = GSM_ADD( v[i], gsm_mult_r( rrp[i], sri ) );
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*/
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tmp1 = ( tmp1 == MIN_WORD && sri == MIN_WORD
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? MAX_WORD
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: 0x0FFFF & (( (longword)tmp1 * (longword)sri
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+ 16384) >> 15)) ;
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v[i+1] = GSM_ADD( v[i], tmp1);
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}
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*sr++ = v[0] = sri;
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}
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}
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/* 4.2.8 */
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static void Decoding_of_the_coded_Log_Area_Ratios (LARc,LARpp)
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word * LARc; /* coded log area ratio [0..7] IN */
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word * LARpp; /* out: decoded .. */
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{
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register word temp1 /* , temp2 */;
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register long ltmp; /* for GSM_ADD */
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/* This procedure requires for efficient implementation
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* two tables.
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*
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* INVA[1..8] = integer( (32768 * 8) / real_A[1..8])
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* MIC[1..8] = minimum value of the LARc[1..8]
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*/
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/* Compute the LARpp[1..8]
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*/
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/* for (i = 1; i <= 8; i++, B++, MIC++, INVA++, LARc++, LARpp++) {
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*
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* temp1 = GSM_ADD( *LARc, *MIC ) << 10;
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* temp2 = *B << 1;
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* temp1 = GSM_SUB( temp1, temp2 );
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*
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* assert(*INVA != MIN_WORD);
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*
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* temp1 = GSM_MULT_R( *INVA, temp1 );
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* *LARpp = GSM_ADD( temp1, temp1 );
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* }
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*/
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#undef STEP
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#define STEP( B, MIC, INVA ) \
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temp1 = GSM_ADD( *LARc++, MIC ) << 10; \
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temp1 = GSM_SUB( temp1, B << 1 ); \
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temp1 = GSM_MULT_R( INVA, temp1 ); \
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*LARpp++ = GSM_ADD( temp1, temp1 );
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STEP( 0, -32, 13107 );
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STEP( 0, -32, 13107 );
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STEP( 2048, -16, 13107 );
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STEP( -2560, -16, 13107 );
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STEP( 94, -8, 19223 );
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STEP( -1792, -8, 17476 );
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STEP( -341, -4, 31454 );
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STEP( -1144, -4, 29708 );
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/* NOTE: the addition of *MIC is used to restore
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* the sign of *LARc.
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*/
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}
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/* 4.2.9 */
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/* Computation of the quantized reflection coefficients
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*/
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/* 4.2.9.1 Interpolation of the LARpp[1..8] to get the LARp[1..8]
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*/
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/*
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* Within each frame of 160 analyzed speech samples the short term
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* analysis and synthesis filters operate with four different sets of
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* coefficients, derived from the previous set of decoded LARs(LARpp(j-1))
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* and the actual set of decoded LARs (LARpp(j))
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*
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* (Initial value: LARpp(j-1)[1..8] = 0.)
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*/
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static void Coefficients_0_12 (LARpp_j_1, LARpp_j, LARp)
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register word * LARpp_j_1;
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register word * LARpp_j;
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register word * LARp;
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{
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register int i;
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register longword ltmp;
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for (i = 1; i <= 8; i++, LARp++, LARpp_j_1++, LARpp_j++) {
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*LARp = GSM_ADD( SASR( *LARpp_j_1, 2 ), SASR( *LARpp_j, 2 ));
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*LARp = GSM_ADD( *LARp, SASR( *LARpp_j_1, 1));
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}
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}
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static void Coefficients_13_26 (LARpp_j_1, LARpp_j, LARp)
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register word * LARpp_j_1;
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register word * LARpp_j;
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register word * LARp;
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{
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register int i;
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register longword ltmp;
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for (i = 1; i <= 8; i++, LARpp_j_1++, LARpp_j++, LARp++) {
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*LARp = GSM_ADD( SASR( *LARpp_j_1, 1), SASR( *LARpp_j, 1 ));
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}
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}
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static void Coefficients_27_39 (LARpp_j_1, LARpp_j, LARp)
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register word * LARpp_j_1;
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register word * LARpp_j;
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register word * LARp;
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{
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register int i;
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register longword ltmp;
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for (i = 1; i <= 8; i++, LARpp_j_1++, LARpp_j++, LARp++) {
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*LARp = GSM_ADD( SASR( *LARpp_j_1, 2 ), SASR( *LARpp_j, 2 ));
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*LARp = GSM_ADD( *LARp, SASR( *LARpp_j, 1 ));
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}
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}
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static void Coefficients_40_159 (LARpp_j, LARp)
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register word * LARpp_j;
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register word * LARp;
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{
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register int i;
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for (i = 1; i <= 8; i++, LARp++, LARpp_j++)
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*LARp = *LARpp_j;
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}
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/* 4.2.9.2 */
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static void LARp_to_rp (LARp)
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register word * LARp; /* [0..7] IN/OUT */
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/*
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* The input of this procedure is the interpolated LARp[0..7] array.
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* The reflection coefficients, rp[i], are used in the analysis
|
|
* filter and in the synthesis filter.
|
|
*/
|
|
{
|
|
register int i;
|
|
register word temp;
|
|
register longword ltmp;
|
|
|
|
for (i = 1; i <= 8; i++, LARp++) {
|
|
|
|
/* temp = GSM_ABS( *LARp );
|
|
*
|
|
* if (temp < 11059) temp <<= 1;
|
|
* else if (temp < 20070) temp += 11059;
|
|
* else temp = GSM_ADD( temp >> 2, 26112 );
|
|
*
|
|
* *LARp = *LARp < 0 ? -temp : temp;
|
|
*/
|
|
|
|
if (*LARp < 0) {
|
|
temp = *LARp == MIN_WORD ? MAX_WORD : -(*LARp);
|
|
*LARp = - ((temp < 11059) ? temp << 1
|
|
: ((temp < 20070) ? temp + 11059
|
|
: GSM_ADD( temp >> 2, 26112 )));
|
|
} else {
|
|
temp = *LARp;
|
|
*LARp = (temp < 11059) ? temp << 1
|
|
: ((temp < 20070) ? temp + 11059
|
|
: GSM_ADD( temp >> 2, 26112 ));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/**** */
|
|
static void Gsm_Short_Term_Synthesis_Filter (S, LARcr, wt, s)
|
|
XA_GSM_STATE * S;
|
|
word * LARcr; /* received log area ratios [0..7] IN */
|
|
word * wt; /* received d [0..159] IN */
|
|
word * s; /* signal s [0..159] OUT */
|
|
{
|
|
word * LARpp_j = S->LARpp[ S->j ];
|
|
word * LARpp_j_1 = S->LARpp[ S->j ^=1 ];
|
|
|
|
word LARp[8];
|
|
|
|
#undef FILTER
|
|
#if defined(FAST) && defined(USE_FLOAT_MUL)
|
|
|
|
# define FILTER (* (S->fast \
|
|
? Fast_Short_term_synthesis_filtering \
|
|
: Short_term_synthesis_filtering ))
|
|
#else
|
|
# define FILTER Short_term_synthesis_filtering
|
|
#endif
|
|
|
|
Decoding_of_the_coded_Log_Area_Ratios( LARcr, LARpp_j );
|
|
|
|
Coefficients_0_12( LARpp_j_1, LARpp_j, LARp );
|
|
LARp_to_rp( LARp );
|
|
FILTER( S, LARp, 13, wt, s );
|
|
|
|
Coefficients_13_26( LARpp_j_1, LARpp_j, LARp);
|
|
LARp_to_rp( LARp );
|
|
FILTER( S, LARp, 14, wt + 13, s + 13 );
|
|
|
|
Coefficients_27_39( LARpp_j_1, LARpp_j, LARp);
|
|
LARp_to_rp( LARp );
|
|
FILTER( S, LARp, 13, wt + 27, s + 27 );
|
|
|
|
Coefficients_40_159( LARpp_j, LARp );
|
|
LARp_to_rp( LARp );
|
|
FILTER(S, LARp, 120, wt + 40, s + 40);
|
|
}
|
|
|
|
|
|
|
|
|
|
static void GSM_Decode(S,LARcr, Ncr,bcr,Mcr,xmaxcr,xMcr,s)
|
|
XA_GSM_STATE *S;
|
|
word *LARcr; /* [0..7] IN */
|
|
word *Ncr; /* [0..3] IN */
|
|
word *bcr; /* [0..3] IN */
|
|
word *Mcr; /* [0..3] IN */
|
|
word *xmaxcr; /* [0..3] IN */
|
|
word *xMcr; /* [0..13*4] IN */
|
|
word *s; /* [0..159] OUT */
|
|
{
|
|
int j, k;
|
|
word erp[40], wt[160];
|
|
word *drp = S->dp0 + 120;
|
|
|
|
for (j=0; j <= 3; j++, xmaxcr++, bcr++, Ncr++, Mcr++, xMcr += 13)
|
|
{
|
|
Gsm_RPE_Decoding( S, *xmaxcr, *Mcr, xMcr, erp );
|
|
Gsm_Long_Term_Synthesis_Filtering( S, *Ncr, *bcr, erp, drp );
|
|
for (k = 0; k <= 39; k++) wt[ j * 40 + k ] = drp[ k ];
|
|
}
|
|
|
|
Gsm_Short_Term_Synthesis_Filter( S, LARcr, wt, s );
|
|
Postprocessing(S, s);
|
|
}
|
|
|
|
|
|
|
|
/****-------------------------------------------------------------------****
|
|
**** Podlipec: For AVI/WAV files GSM 6.10 combines two 33 bytes frames
|
|
**** into one 65 byte frame.
|
|
****-------------------------------------------------------------------****/
|
|
void XA_MSGSM_Decoder(unsigned char *ibuf,unsigned short *obuf)
|
|
{ word sr;
|
|
word LARc[8], Nc[4], Mc[4], bc[4], xmaxc[4], xmc[13*4];
|
|
|
|
sr = *ibuf++;
|
|
|
|
LARc[0] = sr & 0x3f; sr >>= 6;
|
|
sr |= (word)*ibuf++ << 2;
|
|
LARc[1] = sr & 0x3f; sr >>= 6;
|
|
sr |= (word)*ibuf++ << 4;
|
|
LARc[2] = sr & 0x1f; sr >>= 5;
|
|
LARc[3] = sr & 0x1f; sr >>= 5;
|
|
sr |= (word)*ibuf++ << 2;
|
|
LARc[4] = sr & 0xf; sr >>= 4;
|
|
LARc[5] = sr & 0xf; sr >>= 4;
|
|
sr |= (word)*ibuf++ << 2; /* 5 */
|
|
LARc[6] = sr & 0x7; sr >>= 3;
|
|
LARc[7] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 4;
|
|
Nc[0] = sr & 0x7f; sr >>= 7;
|
|
bc[0] = sr & 0x3; sr >>= 2;
|
|
Mc[0] = sr & 0x3; sr >>= 2;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmaxc[0] = sr & 0x3f; sr >>= 6;
|
|
xmc[0] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
xmc[1] = sr & 0x7; sr >>= 3;
|
|
xmc[2] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2;
|
|
xmc[3] = sr & 0x7; sr >>= 3;
|
|
xmc[4] = sr & 0x7; sr >>= 3;
|
|
xmc[5] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1; /* 10 */
|
|
xmc[6] = sr & 0x7; sr >>= 3;
|
|
xmc[7] = sr & 0x7; sr >>= 3;
|
|
xmc[8] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
xmc[9] = sr & 0x7; sr >>= 3;
|
|
xmc[10] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2;
|
|
xmc[11] = sr & 0x7; sr >>= 3;
|
|
xmc[12] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 4;
|
|
Nc[1] = sr & 0x7f; sr >>= 7;
|
|
bc[1] = sr & 0x3; sr >>= 2;
|
|
Mc[1] = sr & 0x3; sr >>= 2;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmaxc[1] = sr & 0x3f; sr >>= 6;
|
|
xmc[13] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++; /* 15 */
|
|
xmc[14] = sr & 0x7; sr >>= 3;
|
|
xmc[15] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2;
|
|
xmc[16] = sr & 0x7; sr >>= 3;
|
|
xmc[17] = sr & 0x7; sr >>= 3;
|
|
xmc[18] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmc[19] = sr & 0x7; sr >>= 3;
|
|
xmc[20] = sr & 0x7; sr >>= 3;
|
|
xmc[21] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
xmc[22] = sr & 0x7; sr >>= 3;
|
|
xmc[23] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2;
|
|
xmc[24] = sr & 0x7; sr >>= 3;
|
|
xmc[25] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 4; /* 20 */
|
|
Nc[2] = sr & 0x7f; sr >>= 7;
|
|
bc[2] = sr & 0x3; sr >>= 2;
|
|
Mc[2] = sr & 0x3; sr >>= 2;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmaxc[2] = sr & 0x3f; sr >>= 6;
|
|
xmc[26] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
xmc[27] = sr & 0x7; sr >>= 3;
|
|
xmc[28] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2;
|
|
xmc[29] = sr & 0x7; sr >>= 3;
|
|
xmc[30] = sr & 0x7; sr >>= 3;
|
|
xmc[31] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmc[32] = sr & 0x7; sr >>= 3;
|
|
xmc[33] = sr & 0x7; sr >>= 3;
|
|
xmc[34] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++; /* 25 */
|
|
xmc[35] = sr & 0x7; sr >>= 3;
|
|
xmc[36] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2;
|
|
xmc[37] = sr & 0x7; sr >>= 3;
|
|
xmc[38] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 4;
|
|
Nc[3] = sr & 0x7f; sr >>= 7;
|
|
bc[3] = sr & 0x3; sr >>= 2;
|
|
Mc[3] = sr & 0x3; sr >>= 2;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmaxc[3] = sr & 0x3f; sr >>= 6;
|
|
xmc[39] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
xmc[40] = sr & 0x7; sr >>= 3;
|
|
xmc[41] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2; /* 30 */
|
|
xmc[42] = sr & 0x7; sr >>= 3;
|
|
xmc[43] = sr & 0x7; sr >>= 3;
|
|
xmc[44] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmc[45] = sr & 0x7; sr >>= 3;
|
|
xmc[46] = sr & 0x7; sr >>= 3;
|
|
xmc[47] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
xmc[48] = sr & 0x7; sr >>= 3;
|
|
xmc[49] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2;
|
|
xmc[50] = sr & 0x7; sr >>= 3;
|
|
xmc[51] = sr & 0x7; sr >>= 3;
|
|
|
|
GSM_Decode(&gsm_state, LARc, Nc, bc, Mc, xmaxc, xmc, obuf);
|
|
|
|
/*
|
|
carry = sr & 0xf;
|
|
sr = carry;
|
|
*/
|
|
/* 2nd frame */
|
|
sr &= 0xf;
|
|
sr |= (word)*ibuf++ << 4; /* 1 */
|
|
LARc[0] = sr & 0x3f; sr >>= 6;
|
|
LARc[1] = sr & 0x3f; sr >>= 6;
|
|
sr = *ibuf++;
|
|
LARc[2] = sr & 0x1f; sr >>= 5;
|
|
sr |= (word)*ibuf++ << 3;
|
|
LARc[3] = sr & 0x1f; sr >>= 5;
|
|
LARc[4] = sr & 0xf; sr >>= 4;
|
|
sr |= (word)*ibuf++ << 2;
|
|
LARc[5] = sr & 0xf; sr >>= 4;
|
|
LARc[6] = sr & 0x7; sr >>= 3;
|
|
LARc[7] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++; /* 5 */
|
|
Nc[0] = sr & 0x7f; sr >>= 7;
|
|
sr |= (word)*ibuf++ << 1;
|
|
bc[0] = sr & 0x3; sr >>= 2;
|
|
Mc[0] = sr & 0x3; sr >>= 2;
|
|
sr |= (word)*ibuf++ << 5;
|
|
xmaxc[0] = sr & 0x3f; sr >>= 6;
|
|
xmc[0] = sr & 0x7; sr >>= 3;
|
|
xmc[1] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmc[2] = sr & 0x7; sr >>= 3;
|
|
xmc[3] = sr & 0x7; sr >>= 3;
|
|
xmc[4] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
xmc[5] = sr & 0x7; sr >>= 3;
|
|
xmc[6] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2; /* 10 */
|
|
xmc[7] = sr & 0x7; sr >>= 3;
|
|
xmc[8] = sr & 0x7; sr >>= 3;
|
|
xmc[9] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmc[10] = sr & 0x7; sr >>= 3;
|
|
xmc[11] = sr & 0x7; sr >>= 3;
|
|
xmc[12] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
Nc[1] = sr & 0x7f; sr >>= 7;
|
|
sr |= (word)*ibuf++ << 1;
|
|
bc[1] = sr & 0x3; sr >>= 2;
|
|
Mc[1] = sr & 0x3; sr >>= 2;
|
|
sr |= (word)*ibuf++ << 5;
|
|
xmaxc[1] = sr & 0x3f; sr >>= 6;
|
|
xmc[13] = sr & 0x7; sr >>= 3;
|
|
xmc[14] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1; /* 15 */
|
|
xmc[15] = sr & 0x7; sr >>= 3;
|
|
xmc[16] = sr & 0x7; sr >>= 3;
|
|
xmc[17] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
xmc[18] = sr & 0x7; sr >>= 3;
|
|
xmc[19] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2;
|
|
xmc[20] = sr & 0x7; sr >>= 3;
|
|
xmc[21] = sr & 0x7; sr >>= 3;
|
|
xmc[22] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmc[23] = sr & 0x7; sr >>= 3;
|
|
xmc[24] = sr & 0x7; sr >>= 3;
|
|
xmc[25] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
Nc[2] = sr & 0x7f; sr >>= 7;
|
|
sr |= (word)*ibuf++ << 1; /* 20 */
|
|
bc[2] = sr & 0x3; sr >>= 2;
|
|
Mc[2] = sr & 0x3; sr >>= 2;
|
|
sr |= (word)*ibuf++ << 5;
|
|
xmaxc[2] = sr & 0x3f; sr >>= 6;
|
|
xmc[26] = sr & 0x7; sr >>= 3;
|
|
xmc[27] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmc[28] = sr & 0x7; sr >>= 3;
|
|
xmc[29] = sr & 0x7; sr >>= 3;
|
|
xmc[30] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
xmc[31] = sr & 0x7; sr >>= 3;
|
|
xmc[32] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2;
|
|
xmc[33] = sr & 0x7; sr >>= 3;
|
|
xmc[34] = sr & 0x7; sr >>= 3;
|
|
xmc[35] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1; /* 25 */
|
|
xmc[36] = sr & 0x7; sr >>= 3;
|
|
xmc[37] = sr & 0x7; sr >>= 3;
|
|
xmc[38] = sr & 0x7; sr >>= 3;
|
|
sr = *ibuf++;
|
|
Nc[3] = sr & 0x7f; sr >>= 7;
|
|
sr |= (word)*ibuf++ << 1;
|
|
bc[3] = sr & 0x3; sr >>= 2;
|
|
Mc[3] = sr & 0x3; sr >>= 2;
|
|
sr |= (word)*ibuf++ << 5;
|
|
xmaxc[3] = sr & 0x3f; sr >>= 6;
|
|
xmc[39] = sr & 0x7; sr >>= 3;
|
|
xmc[40] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmc[41] = sr & 0x7; sr >>= 3;
|
|
xmc[42] = sr & 0x7; sr >>= 3;
|
|
xmc[43] = sr & 0x7; sr >>= 3;
|
|
sr = (word)*ibuf++; /* 30 */
|
|
xmc[44] = sr & 0x7; sr >>= 3;
|
|
xmc[45] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 2;
|
|
xmc[46] = sr & 0x7; sr >>= 3;
|
|
xmc[47] = sr & 0x7; sr >>= 3;
|
|
xmc[48] = sr & 0x7; sr >>= 3;
|
|
sr |= (word)*ibuf++ << 1;
|
|
xmc[49] = sr & 0x7; sr >>= 3;
|
|
xmc[50] = sr & 0x7; sr >>= 3;
|
|
xmc[51] = sr & 0x7; sr >>= 3;
|
|
|
|
GSM_Decode(&gsm_state, LARc, Nc, bc, Mc, xmaxc, xmc, &obuf[160]);
|
|
|
|
/* Return number of source bytes consumed and output samples produced */
|
|
// *icnt = 65;
|
|
// *ocnt = 320;
|
|
return;
|
|
}
|
|
|
|
#define GSM_MAGIC 0xd
|
|
|
|
void XA_GSM_Decoder(unsigned char *ibuf,unsigned short *obuf)
|
|
{ word LARc[8], Nc[4], Mc[4], bc[4], xmaxc[4], xmc[13*4];
|
|
|
|
/* Sanity */
|
|
if (((*ibuf >> 4) & 0x0F) != GSM_MAGIC)
|
|
{ int i;
|
|
for(i=0;i<160;i++) obuf[i] = 0;
|
|
// *icnt = 33;
|
|
// *ocnt = 160;
|
|
return;
|
|
}
|
|
|
|
LARc[0] = (*ibuf++ & 0xF) << 2; /* 1 */
|
|
LARc[0] |= (*ibuf >> 6) & 0x3;
|
|
LARc[1] = *ibuf++ & 0x3F;
|
|
LARc[2] = (*ibuf >> 3) & 0x1F;
|
|
LARc[3] = (*ibuf++ & 0x7) << 2;
|
|
LARc[3] |= (*ibuf >> 6) & 0x3;
|
|
LARc[4] = (*ibuf >> 2) & 0xF;
|
|
LARc[5] = (*ibuf++ & 0x3) << 2;
|
|
LARc[5] |= (*ibuf >> 6) & 0x3;
|
|
LARc[6] = (*ibuf >> 3) & 0x7;
|
|
LARc[7] = *ibuf++ & 0x7;
|
|
|
|
Nc[0] = (*ibuf >> 1) & 0x7F;
|
|
|
|
bc[0] = (*ibuf++ & 0x1) << 1;
|
|
bc[0] |= (*ibuf >> 7) & 0x1;
|
|
|
|
Mc[0] = (*ibuf >> 5) & 0x3;
|
|
|
|
xmaxc[0] = (*ibuf++ & 0x1F) << 1;
|
|
xmaxc[0] |= (*ibuf >> 7) & 0x1;
|
|
|
|
xmc[0] = (*ibuf >> 4) & 0x7;
|
|
xmc[1] = (*ibuf >> 1) & 0x7;
|
|
xmc[2] = (*ibuf++ & 0x1) << 2;
|
|
xmc[2] |= (*ibuf >> 6) & 0x3;
|
|
xmc[3] = (*ibuf >> 3) & 0x7;
|
|
xmc[4] = *ibuf++ & 0x7;
|
|
xmc[5] = (*ibuf >> 5) & 0x7;
|
|
xmc[6] = (*ibuf >> 2) & 0x7;
|
|
xmc[7] = (*ibuf++ & 0x3) << 1; /* 10 */
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xmc[7] |= (*ibuf >> 7) & 0x1;
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xmc[8] = (*ibuf >> 4) & 0x7;
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xmc[9] = (*ibuf >> 1) & 0x7;
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xmc[10] = (*ibuf++ & 0x1) << 2;
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xmc[10] |= (*ibuf >> 6) & 0x3;
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xmc[11] = (*ibuf >> 3) & 0x7;
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xmc[12] = *ibuf++ & 0x7;
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Nc[1] = (*ibuf >> 1) & 0x7F;
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bc[1] = (*ibuf++ & 0x1) << 1;
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bc[1] |= (*ibuf >> 7) & 0x1;
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Mc[1] = (*ibuf >> 5) & 0x3;
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xmaxc[1] = (*ibuf++ & 0x1F) << 1;
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xmaxc[1] |= (*ibuf >> 7) & 0x1;
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xmc[13] = (*ibuf >> 4) & 0x7;
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xmc[14] = (*ibuf >> 1) & 0x7;
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xmc[15] = (*ibuf++ & 0x1) << 2;
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xmc[15] |= (*ibuf >> 6) & 0x3;
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xmc[16] = (*ibuf >> 3) & 0x7;
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xmc[17] = *ibuf++ & 0x7;
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xmc[18] = (*ibuf >> 5) & 0x7;
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xmc[19] = (*ibuf >> 2) & 0x7;
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xmc[20] = (*ibuf++ & 0x3) << 1;
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xmc[20] |= (*ibuf >> 7) & 0x1;
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xmc[21] = (*ibuf >> 4) & 0x7;
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xmc[22] = (*ibuf >> 1) & 0x7;
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xmc[23] = (*ibuf++ & 0x1) << 2;
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xmc[23] |= (*ibuf >> 6) & 0x3;
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xmc[24] = (*ibuf >> 3) & 0x7;
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xmc[25] = *ibuf++ & 0x7;
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Nc[2] = (*ibuf >> 1) & 0x7F;
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|
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bc[2] = (*ibuf++ & 0x1) << 1; /* 20 */
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bc[2] |= (*ibuf >> 7) & 0x1;
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|
|
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Mc[2] = (*ibuf >> 5) & 0x3;
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|
|
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xmaxc[2] = (*ibuf++ & 0x1F) << 1;
|
|
xmaxc[2] |= (*ibuf >> 7) & 0x1;
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|
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xmc[26] = (*ibuf >> 4) & 0x7;
|
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xmc[27] = (*ibuf >> 1) & 0x7;
|
|
xmc[28] = (*ibuf++ & 0x1) << 2;
|
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xmc[28] |= (*ibuf >> 6) & 0x3;
|
|
xmc[29] = (*ibuf >> 3) & 0x7;
|
|
xmc[30] = *ibuf++ & 0x7;
|
|
xmc[31] = (*ibuf >> 5) & 0x7;
|
|
xmc[32] = (*ibuf >> 2) & 0x7;
|
|
xmc[33] = (*ibuf++ & 0x3) << 1;
|
|
xmc[33] |= (*ibuf >> 7) & 0x1;
|
|
xmc[34] = (*ibuf >> 4) & 0x7;
|
|
xmc[35] = (*ibuf >> 1) & 0x7;
|
|
xmc[36] = (*ibuf++ & 0x1) << 2;
|
|
xmc[36] |= (*ibuf >> 6) & 0x3;
|
|
xmc[37] = (*ibuf >> 3) & 0x7;
|
|
xmc[38] = *ibuf++ & 0x7;
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|
|
|
Nc[3] = (*ibuf >> 1) & 0x7F;
|
|
|
|
bc[3] = (*ibuf++ & 0x1) << 1;
|
|
bc[3] |= (*ibuf >> 7) & 0x1;
|
|
|
|
Mc[3] = (*ibuf >> 5) & 0x3;
|
|
|
|
xmaxc[3] = (*ibuf++ & 0x1F) << 1;
|
|
xmaxc[3] |= (*ibuf >> 7) & 0x1;
|
|
|
|
xmc[39] = (*ibuf >> 4) & 0x7;
|
|
xmc[40] = (*ibuf >> 1) & 0x7;
|
|
xmc[41] = (*ibuf++ & 0x1) << 2;
|
|
xmc[41] |= (*ibuf >> 6) & 0x3;
|
|
xmc[42] = (*ibuf >> 3) & 0x7;
|
|
xmc[43] = *ibuf++ & 0x7; /* 30 */
|
|
xmc[44] = (*ibuf >> 5) & 0x7;
|
|
xmc[45] = (*ibuf >> 2) & 0x7;
|
|
xmc[46] = (*ibuf++ & 0x3) << 1;
|
|
xmc[46] |= (*ibuf >> 7) & 0x1;
|
|
xmc[47] = (*ibuf >> 4) & 0x7;
|
|
xmc[48] = (*ibuf >> 1) & 0x7;
|
|
xmc[49] = (*ibuf++ & 0x1) << 2;
|
|
xmc[49] |= (*ibuf >> 6) & 0x3;
|
|
xmc[50] = (*ibuf >> 3) & 0x7;
|
|
xmc[51] = *ibuf & 0x7; /* 33 */
|
|
|
|
GSM_Decode(&gsm_state, LARc, Nc, bc, Mc, xmaxc, xmc, obuf);
|
|
|
|
/* Return number of source bytes consumed and output samples produced */
|
|
// *icnt = 33;
|
|
// *ocnt = 160;
|
|
}
|