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-rw-r--r--trunk/codecs/g722/g722_encode.c400
1 files changed, 0 insertions, 400 deletions
diff --git a/trunk/codecs/g722/g722_encode.c b/trunk/codecs/g722/g722_encode.c
deleted file mode 100644
index ad7e6b522..000000000
--- a/trunk/codecs/g722/g722_encode.c
+++ /dev/null
@@ -1,400 +0,0 @@
-/*
- * SpanDSP - a series of DSP components for telephony
- *
- * g722_encode.c - The ITU G.722 codec, encode part.
- *
- * Written by Steve Underwood <steveu@coppice.org>
- *
- * Copyright (C) 2005 Steve Underwood
- *
- * All rights reserved.
- *
- * Despite my general liking of the GPL, I place my own contributions
- * to this code in the public domain for the benefit of all mankind -
- * even the slimy ones who might try to proprietize my work and use it
- * to my detriment.
- *
- * Based on a single channel 64kbps only G.722 codec which is:
- *
- ***** Copyright (c) CMU 1993 *****
- * Computer Science, Speech Group
- * Chengxiang Lu and Alex Hauptmann
- *
- * $Id$
- */
-
-/*! \file */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <stdio.h>
-#include <inttypes.h>
-#include <memory.h>
-#include <stdlib.h>
-#if 0
-#include <tgmath.h>
-#endif
-
-#include "g722.h"
-
-#if !defined(FALSE)
-#define FALSE 0
-#endif
-#if !defined(TRUE)
-#define TRUE (!FALSE)
-#endif
-
-static __inline__ int16_t saturate(int32_t amp)
-{
- int16_t amp16;
-
- /* Hopefully this is optimised for the common case - not clipping */
- amp16 = (int16_t) amp;
- if (amp == amp16)
- return amp16;
- if (amp > INT16_MAX)
- return INT16_MAX;
- return INT16_MIN;
-}
-/*- End of function --------------------------------------------------------*/
-
-static void block4(g722_encode_state_t *s, int band, int d)
-{
- int wd1;
- int wd2;
- int wd3;
- int i;
-
- /* Block 4, RECONS */
- s->band[band].d[0] = d;
- s->band[band].r[0] = saturate(s->band[band].s + d);
-
- /* Block 4, PARREC */
- s->band[band].p[0] = saturate(s->band[band].sz + d);
-
- /* Block 4, UPPOL2 */
- for (i = 0; i < 3; i++)
- s->band[band].sg[i] = s->band[band].p[i] >> 15;
- wd1 = saturate(s->band[band].a[1] << 2);
-
- wd2 = (s->band[band].sg[0] == s->band[band].sg[1]) ? -wd1 : wd1;
- if (wd2 > 32767)
- wd2 = 32767;
- wd3 = (wd2 >> 7) + ((s->band[band].sg[0] == s->band[band].sg[2]) ? 128 : -128);
- wd3 += (s->band[band].a[2]*32512) >> 15;
- if (wd3 > 12288)
- wd3 = 12288;
- else if (wd3 < -12288)
- wd3 = -12288;
- s->band[band].ap[2] = wd3;
-
- /* Block 4, UPPOL1 */
- s->band[band].sg[0] = s->band[band].p[0] >> 15;
- s->band[band].sg[1] = s->band[band].p[1] >> 15;
- wd1 = (s->band[band].sg[0] == s->band[band].sg[1]) ? 192 : -192;
- wd2 = (s->band[band].a[1]*32640) >> 15;
-
- s->band[band].ap[1] = saturate(wd1 + wd2);
- wd3 = saturate(15360 - s->band[band].ap[2]);
- if (s->band[band].ap[1] > wd3)
- s->band[band].ap[1] = wd3;
- else if (s->band[band].ap[1] < -wd3)
- s->band[band].ap[1] = -wd3;
-
- /* Block 4, UPZERO */
- wd1 = (d == 0) ? 0 : 128;
- s->band[band].sg[0] = d >> 15;
- for (i = 1; i < 7; i++)
- {
- s->band[band].sg[i] = s->band[band].d[i] >> 15;
- wd2 = (s->band[band].sg[i] == s->band[band].sg[0]) ? wd1 : -wd1;
- wd3 = (s->band[band].b[i]*32640) >> 15;
- s->band[band].bp[i] = saturate(wd2 + wd3);
- }
-
- /* Block 4, DELAYA */
- for (i = 6; i > 0; i--)
- {
- s->band[band].d[i] = s->band[band].d[i - 1];
- s->band[band].b[i] = s->band[band].bp[i];
- }
-
- for (i = 2; i > 0; i--)
- {
- s->band[band].r[i] = s->band[band].r[i - 1];
- s->band[band].p[i] = s->band[band].p[i - 1];
- s->band[band].a[i] = s->band[band].ap[i];
- }
-
- /* Block 4, FILTEP */
- wd1 = saturate(s->band[band].r[1] + s->band[band].r[1]);
- wd1 = (s->band[band].a[1]*wd1) >> 15;
- wd2 = saturate(s->band[band].r[2] + s->band[band].r[2]);
- wd2 = (s->band[band].a[2]*wd2) >> 15;
- s->band[band].sp = saturate(wd1 + wd2);
-
- /* Block 4, FILTEZ */
- s->band[band].sz = 0;
- for (i = 6; i > 0; i--)
- {
- wd1 = saturate(s->band[band].d[i] + s->band[band].d[i]);
- s->band[band].sz += (s->band[band].b[i]*wd1) >> 15;
- }
- s->band[band].sz = saturate(s->band[band].sz);
-
- /* Block 4, PREDIC */
- s->band[band].s = saturate(s->band[band].sp + s->band[band].sz);
-}
-/*- End of function --------------------------------------------------------*/
-
-g722_encode_state_t *g722_encode_init(g722_encode_state_t *s, int rate, int options)
-{
- if (s == NULL)
- {
- if ((s = (g722_encode_state_t *) malloc(sizeof(*s))) == NULL)
- return NULL;
- }
- memset(s, 0, sizeof(*s));
- if (rate == 48000)
- s->bits_per_sample = 6;
- else if (rate == 56000)
- s->bits_per_sample = 7;
- else
- s->bits_per_sample = 8;
- if ((options & G722_SAMPLE_RATE_8000))
- s->eight_k = TRUE;
- if ((options & G722_PACKED) && s->bits_per_sample != 8)
- s->packed = TRUE;
- else
- s->packed = FALSE;
- s->band[0].det = 32;
- s->band[1].det = 8;
- return s;
-}
-/*- End of function --------------------------------------------------------*/
-
-int g722_encode_release(g722_encode_state_t *s)
-{
- free(s);
- return 0;
-}
-/*- End of function --------------------------------------------------------*/
-
-int g722_encode(g722_encode_state_t *s, uint8_t g722_data[], const int16_t amp[], int len)
-{
- static const int q6[32] =
- {
- 0, 35, 72, 110, 150, 190, 233, 276,
- 323, 370, 422, 473, 530, 587, 650, 714,
- 786, 858, 940, 1023, 1121, 1219, 1339, 1458,
- 1612, 1765, 1980, 2195, 2557, 2919, 0, 0
- };
- static const int iln[32] =
- {
- 0, 63, 62, 31, 30, 29, 28, 27,
- 26, 25, 24, 23, 22, 21, 20, 19,
- 18, 17, 16, 15, 14, 13, 12, 11,
- 10, 9, 8, 7, 6, 5, 4, 0
- };
- static const int ilp[32] =
- {
- 0, 61, 60, 59, 58, 57, 56, 55,
- 54, 53, 52, 51, 50, 49, 48, 47,
- 46, 45, 44, 43, 42, 41, 40, 39,
- 38, 37, 36, 35, 34, 33, 32, 0
- };
- static const int wl[8] =
- {
- -60, -30, 58, 172, 334, 538, 1198, 3042
- };
- static const int rl42[16] =
- {
- 0, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 0
- };
- static const int ilb[32] =
- {
- 2048, 2093, 2139, 2186, 2233, 2282, 2332,
- 2383, 2435, 2489, 2543, 2599, 2656, 2714,
- 2774, 2834, 2896, 2960, 3025, 3091, 3158,
- 3228, 3298, 3371, 3444, 3520, 3597, 3676,
- 3756, 3838, 3922, 4008
- };
- static const int qm4[16] =
- {
- 0, -20456, -12896, -8968,
- -6288, -4240, -2584, -1200,
- 20456, 12896, 8968, 6288,
- 4240, 2584, 1200, 0
- };
- static const int qm2[4] =
- {
- -7408, -1616, 7408, 1616
- };
- static const int qmf_coeffs[12] =
- {
- 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11,
- };
- static const int ihn[3] = {0, 1, 0};
- static const int ihp[3] = {0, 3, 2};
- static const int wh[3] = {0, -214, 798};
- static const int rh2[4] = {2, 1, 2, 1};
-
- int dlow;
- int dhigh;
- int el;
- int wd;
- int wd1;
- int ril;
- int wd2;
- int il4;
- int ih2;
- int wd3;
- int eh;
- int mih;
- int i;
- int j;
- /* Low and high band PCM from the QMF */
- int xlow;
- int xhigh;
- int g722_bytes;
- /* Even and odd tap accumulators */
- int sumeven;
- int sumodd;
- int ihigh;
- int ilow;
- int code;
-
- g722_bytes = 0;
- xhigh = 0;
- for (j = 0; j < len; )
- {
- if (s->itu_test_mode)
- {
- xlow =
- xhigh = amp[j++] >> 1;
- }
- else
- {
- if (s->eight_k)
- {
- xlow = amp[j++];
- }
- else
- {
- /* Apply the transmit QMF */
- /* Shuffle the buffer down */
- for (i = 0; i < 22; i++)
- s->x[i] = s->x[i + 2];
- s->x[22] = amp[j++];
- s->x[23] = amp[j++];
-
- /* Discard every other QMF output */
- sumeven = 0;
- sumodd = 0;
- for (i = 0; i < 12; i++)
- {
- sumodd += s->x[2*i]*qmf_coeffs[i];
- sumeven += s->x[2*i + 1]*qmf_coeffs[11 - i];
- }
- xlow = (sumeven + sumodd) >> 13;
- xhigh = (sumeven - sumodd) >> 13;
- }
- }
- /* Block 1L, SUBTRA */
- el = saturate(xlow - s->band[0].s);
-
- /* Block 1L, QUANTL */
- wd = (el >= 0) ? el : -(el + 1);
-
- for (i = 1; i < 30; i++)
- {
- wd1 = (q6[i]*s->band[0].det) >> 12;
- if (wd < wd1)
- break;
- }
- ilow = (el < 0) ? iln[i] : ilp[i];
-
- /* Block 2L, INVQAL */
- ril = ilow >> 2;
- wd2 = qm4[ril];
- dlow = (s->band[0].det*wd2) >> 15;
-
- /* Block 3L, LOGSCL */
- il4 = rl42[ril];
- wd = (s->band[0].nb*127) >> 7;
- s->band[0].nb = wd + wl[il4];
- if (s->band[0].nb < 0)
- s->band[0].nb = 0;
- else if (s->band[0].nb > 18432)
- s->band[0].nb = 18432;
-
- /* Block 3L, SCALEL */
- wd1 = (s->band[0].nb >> 6) & 31;
- wd2 = 8 - (s->band[0].nb >> 11);
- wd3 = (wd2 < 0) ? (ilb[wd1] << -wd2) : (ilb[wd1] >> wd2);
- s->band[0].det = wd3 << 2;
-
- block4(s, 0, dlow);
-
- if (s->eight_k)
- {
- /* Just leave the high bits as zero */
- code = (0xC0 | ilow) >> (8 - s->bits_per_sample);
- }
- else
- {
- /* Block 1H, SUBTRA */
- eh = saturate(xhigh - s->band[1].s);
-
- /* Block 1H, QUANTH */
- wd = (eh >= 0) ? eh : -(eh + 1);
- wd1 = (564*s->band[1].det) >> 12;
- mih = (wd >= wd1) ? 2 : 1;
- ihigh = (eh < 0) ? ihn[mih] : ihp[mih];
-
- /* Block 2H, INVQAH */
- wd2 = qm2[ihigh];
- dhigh = (s->band[1].det*wd2) >> 15;
-
- /* Block 3H, LOGSCH */
- ih2 = rh2[ihigh];
- wd = (s->band[1].nb*127) >> 7;
- s->band[1].nb = wd + wh[ih2];
- if (s->band[1].nb < 0)
- s->band[1].nb = 0;
- else if (s->band[1].nb > 22528)
- s->band[1].nb = 22528;
-
- /* Block 3H, SCALEH */
- wd1 = (s->band[1].nb >> 6) & 31;
- wd2 = 10 - (s->band[1].nb >> 11);
- wd3 = (wd2 < 0) ? (ilb[wd1] << -wd2) : (ilb[wd1] >> wd2);
- s->band[1].det = wd3 << 2;
-
- block4(s, 1, dhigh);
- code = ((ihigh << 6) | ilow) >> (8 - s->bits_per_sample);
- }
-
- if (s->packed)
- {
- /* Pack the code bits */
- s->out_buffer |= (code << s->out_bits);
- s->out_bits += s->bits_per_sample;
- if (s->out_bits >= 8)
- {
- g722_data[g722_bytes++] = (uint8_t) (s->out_buffer & 0xFF);
- s->out_bits -= 8;
- s->out_buffer >>= 8;
- }
- }
- else
- {
- g722_data[g722_bytes++] = (uint8_t) code;
- }
- }
- return g722_bytes;
-}
-/*- End of function --------------------------------------------------------*/
-/*- End of file ------------------------------------------------------------*/
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