From ba716659248f262ac2b45d16db686117f18f72ec Mon Sep 17 00:00:00 2001 From: Matthew Fredrickson Date: Thu, 21 Dec 2006 00:08:21 +0000 Subject: [PATCH] Add codec G.722 support. git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@48661 65c4cc65-6c06-0410-ace0-fbb531ad65f3 --- build_tools/embed_modules.xml | 2 +- codecs/Makefile | 7 + codecs/codec_g722.c | 219 +++++++++++++++++++ codecs/g722/Makefile | 16 ++ codecs/g722/g722.h | 141 ++++++++++++ codecs/g722/g722_decode.c | 398 +++++++++++++++++++++++++++++++++ codecs/g722/g722_encode.c | 400 ++++++++++++++++++++++++++++++++++ codecs/g722_slin_ex.h | 25 +++ codecs/slin_g722_ex.h | 25 +++ 9 files changed, 1232 insertions(+), 1 deletion(-) create mode 100644 codecs/codec_g722.c create mode 100644 codecs/g722/Makefile create mode 100644 codecs/g722/g722.h create mode 100644 codecs/g722/g722_decode.c create mode 100644 codecs/g722/g722_encode.c create mode 100644 codecs/g722_slin_ex.h create mode 100644 codecs/slin_g722_ex.h diff --git a/build_tools/embed_modules.xml b/build_tools/embed_modules.xml index 54ae622ce5..e22cc7e19f 100644 --- a/build_tools/embed_modules.xml +++ b/build_tools/embed_modules.xml @@ -8,7 +8,7 @@ gnu_ld - + gnu_ld diff --git a/codecs/Makefile b/codecs/Makefile index c3ab707f6d..df527ff7cc 100644 --- a/codecs/Makefile +++ b/codecs/Makefile @@ -25,6 +25,7 @@ endif LIBILBC:=ilbc/libilbc.a LIBLPC10:=lpc10/liblpc10.a +LIBG722:=g722/libg722.a all: _all @@ -39,6 +40,7 @@ clean:: $(MAKE) -C gsm clean $(MAKE) -C lpc10 clean $(MAKE) -C ilbc clean + $(MAKE) -C g722 clean gsm/lib/libgsm.a: @mkdir -p gsm/lib @@ -53,3 +55,8 @@ $(LIBILBC): @$(MAKE) -C ilbc all $(if $(filter codec_ilbc,$(EMBEDDED_MODS)),modules.link,codec_ilbc.so): $(LIBILBC) + +$(LIBG722): + @$(MAKE) -C g722 all + +$(if $(filter codec_g722,$(EMBEDDED_MODS)),modules.link,codec_g722.so): $(LIBG722) diff --git a/codecs/codec_g722.c b/codecs/codec_g722.c new file mode 100644 index 0000000000..470a687e9b --- /dev/null +++ b/codecs/codec_g722.c @@ -0,0 +1,219 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 1999 - 2006, Digium, Inc. + * + * Matthew Fredrickson + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +/*! \file + * + * \brief codec_g722.c - translate between signed linear and ITU G.722-64kbps + * + * \ingroup codecs + */ + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include +#include +#include +#include +#include +#include + +#include "asterisk/lock.h" +#include "asterisk/logger.h" +#include "asterisk/linkedlists.h" +#include "asterisk/module.h" +#include "asterisk/config.h" +#include "asterisk/options.h" +#include "asterisk/translate.h" +#include "asterisk/channel.h" +#include "asterisk/utils.h" + +#define BUFFER_SAMPLES 8096 /* size for the translation buffers */ +#define BUF_SHIFT 5 + +/* Sample frame data */ + +#include "g722/g722.h" +#include "slin_g722_ex.h" +#include "g722_slin_ex.h" + +struct g722_encoder_pvt { + g722_encode_state_t g722; +}; + +struct g722_decoder_pvt { + g722_decode_state_t g722; +}; + +/*! \brief init a new instance of g722_encoder_pvt. */ +static int lintog722_new(struct ast_trans_pvt *pvt) +{ + struct g722_encoder_pvt *tmp = pvt->pvt; + + g722_encode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000); + + return 0; +} + +/*! \brief init a new instance of g722_encoder_pvt. */ +static int g722tolin_new(struct ast_trans_pvt *pvt) +{ + struct g722_decoder_pvt *tmp = pvt->pvt; + + g722_decode_init(&tmp->g722, 64000, G722_SAMPLE_RATE_8000); + + return 0; +} + +static int g722tolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f) +{ + struct g722_decoder_pvt *tmp = pvt->pvt; + unsigned char *src = f->data; + int16_t *dst = (int16_t *) pvt->outbuf + pvt->samples; + + g722_decode(&tmp->g722, dst, src, f->samples); + pvt->samples += f->samples; + pvt->datalen += 2 * f->samples; + + return 0; +} + +static int lintog722_framein(struct ast_trans_pvt *pvt, struct ast_frame *f) +{ + struct g722_encoder_pvt *tmp = pvt->pvt; + int16_t *src = f->data; + + g722_encode(&tmp->g722, &pvt->outbuf[pvt->datalen], src, f->samples); + /* Since G.722 64kbps per second is one bye per sample, all of these + calculations are easy */ + pvt->samples += f->samples; + pvt->datalen += f->samples; + + return 0; +} + +static struct ast_frame *g722tolin_sample(void) +{ + static struct ast_frame f = { + .frametype = AST_FRAME_VOICE, + .subclass = AST_FORMAT_G722, + .datalen = sizeof(g722_slin_ex), + .samples = sizeof(g722_slin_ex), + .src = __PRETTY_FUNCTION__, + .data = g722_slin_ex, + }; + + return &f; +} + +static struct ast_frame *lintog722_sample (void) +{ + static struct ast_frame f = { + .frametype = AST_FRAME_VOICE, + .subclass = AST_FORMAT_SLINEAR, + .datalen = sizeof(slin_g722_ex), + .samples = sizeof(slin_g722_ex), + .src = __PRETTY_FUNCTION__, + .data = slin_g722_ex, + }; + + return &f; +} + +static struct ast_translator g722tolin = { + .name = "g722tolin", + .srcfmt = AST_FORMAT_G722, + .dstfmt = AST_FORMAT_SLINEAR, + .newpvt = g722tolin_new, /* same for both directions */ + .framein = g722tolin_framein, + .sample = g722tolin_sample, + .desc_size = sizeof(struct g722_decoder_pvt), + .buffer_samples = BUFFER_SAMPLES, + .buf_size = BUFFER_SAMPLES, + .plc_samples = 160, +}; + +static struct ast_translator lintog722 = { + .name = "lintog722", + .srcfmt = AST_FORMAT_SLINEAR, + .dstfmt = AST_FORMAT_G722, + .newpvt = lintog722_new, /* same for both directions */ + .framein = lintog722_framein, + .sample = lintog722_sample, + .desc_size = sizeof(struct g722_encoder_pvt), + .buffer_samples = BUFFER_SAMPLES, + .buf_size = BUFFER_SAMPLES, +}; + +static void parse_config(void) +{ + struct ast_variable *var; + struct ast_config *cfg = ast_config_load("codecs.conf"); + + if (!cfg) + return; + for (var = ast_variable_browse(cfg, "plc"); var; var = var->next) { + if (!strcasecmp(var->name, "genericplc")) { + g722tolin.useplc = ast_true(var->value) ? 1 : 0; + if (option_verbose > 2) + ast_verbose(VERBOSE_PREFIX_3 "codec_g722: %susing generic PLC\n", + g722tolin.useplc ? "" : "not "); + } + } + ast_config_destroy(cfg); +} + +static int reload(void) +{ + parse_config(); + + return 0; +} + +static int unload_module(void) +{ + int res = 0; + + res |= ast_unregister_translator(&g722tolin); + res |= ast_unregister_translator(&lintog722); + + return res; +} + +static int load_module(void) +{ + int res = 0; + + + parse_config(); + + res |= ast_register_translator(&g722tolin); + res |= ast_register_translator(&lintog722); + + if (res) + unload_module(); + + return res; +} + +AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "ITU G.722-64kbps G722 Transcoder", + .load = load_module, + .unload = unload_module, + .reload = reload, + ); diff --git a/codecs/g722/Makefile b/codecs/g722/Makefile new file mode 100644 index 0000000000..b69afaaa23 --- /dev/null +++ b/codecs/g722/Makefile @@ -0,0 +1,16 @@ +LIB=libg722.a +CFLAGS+=-fPIC + +include $(ASTTOPDIR)/Makefile.rules + +OBJS=g722_encode.o g722_decode.o + +all: $(LIB) + +$(LIB): $(OBJS) + $(ECHO_PREFIX) echo " [AR] $^ -> $@" + $(CMD_PREFIX) $(AR) cr $@ $^ + $(CMD_PREFIX) $(RANLIB) $@ + +clean: + rm -f $(LIB) *.o diff --git a/codecs/g722/g722.h b/codecs/g722/g722.h new file mode 100644 index 0000000000..95a9da8d01 --- /dev/null +++ b/codecs/g722/g722.h @@ -0,0 +1,141 @@ +/* + * SpanDSP - a series of DSP components for telephony + * + * g722.h - The ITU G.722 codec. + * + * Written by Steve Underwood + * + * Copyright (C) 2005 Steve Underwood + * + * 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 G.722 codec which is: + * + ***** Copyright (c) CMU 1993 ***** + * Computer Science, Speech Group + * Chengxiang Lu and Alex Hauptmann + * + * $Id$ + */ + + +/*! \file */ + +#if !defined(_G722_H_) +#define _G722_H_ + +/*! \page g722_page G.722 encoding and decoding +\section g722_page_sec_1 What does it do? +The G.722 module is a bit exact implementation of the ITU G.722 specification for all three +specified bit rates - 64000bps, 56000bps and 48000bps. It passes the ITU tests. + +To allow fast and flexible interworking with narrow band telephony, the encoder and decoder +support an option for the linear audio to be an 8k samples/second stream. In this mode the +codec is considerably faster, and still fully compatible with wideband terminals using G.722. + +\section g722_page_sec_2 How does it work? +???. +*/ + +enum +{ + G722_SAMPLE_RATE_8000 = 0x0001, + G722_PACKED = 0x0002 +}; + +typedef struct +{ + /*! TRUE if the operating in the special ITU test mode, with the band split filters + disabled. */ + int itu_test_mode; + /*! TRUE if the G.722 data is packed */ + int packed; + /*! TRUE if encode from 8k samples/second */ + int eight_k; + /*! 6 for 48000kbps, 7 for 56000kbps, or 8 for 64000kbps. */ + int bits_per_sample; + + /*! Signal history for the QMF */ + int x[24]; + + struct + { + int s; + int sp; + int sz; + int r[3]; + int a[3]; + int ap[3]; + int p[3]; + int d[7]; + int b[7]; + int bp[7]; + int sg[7]; + int nb; + int det; + } band[2]; + + unsigned int in_buffer; + int in_bits; + unsigned int out_buffer; + int out_bits; +} g722_encode_state_t; + +typedef struct +{ + /*! TRUE if the operating in the special ITU test mode, with the band split filters + disabled. */ + int itu_test_mode; + /*! TRUE if the G.722 data is packed */ + int packed; + /*! TRUE if decode to 8k samples/second */ + int eight_k; + /*! 6 for 48000kbps, 7 for 56000kbps, or 8 for 64000kbps. */ + int bits_per_sample; + + /*! Signal history for the QMF */ + int x[24]; + + struct + { + int s; + int sp; + int sz; + int r[3]; + int a[3]; + int ap[3]; + int p[3]; + int d[7]; + int b[7]; + int bp[7]; + int sg[7]; + int nb; + int det; + } band[2]; + + unsigned int in_buffer; + int in_bits; + unsigned int out_buffer; + int out_bits; +} g722_decode_state_t; + +#ifdef __cplusplus +extern "C" { +#endif + +g722_encode_state_t *g722_encode_init(g722_encode_state_t *s, int rate, int options); +int g722_encode_release(g722_encode_state_t *s); +int g722_encode(g722_encode_state_t *s, uint8_t g722_data[], const int16_t amp[], int len); + +g722_decode_state_t *g722_decode_init(g722_decode_state_t *s, int rate, int options); +int g722_decode_release(g722_decode_state_t *s); +int g722_decode(g722_decode_state_t *s, int16_t amp[], const uint8_t g722_data[], int len); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/codecs/g722/g722_decode.c b/codecs/g722/g722_decode.c new file mode 100644 index 0000000000..1625acc860 --- /dev/null +++ b/codecs/g722/g722_decode.c @@ -0,0 +1,398 @@ +/* + * SpanDSP - a series of DSP components for telephony + * + * g722_decode.c - The ITU G.722 codec, decode part. + * + * Written by Steve Underwood + * + * Copyright (C) 2005 Steve Underwood + * + * 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 in part on a single channel 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 +#endif + +#include +#include +#include +#include +#if 0 +#include +#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_decode_state_t *s, int band, int d); + +static void block4(g722_decode_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 = (s->band[band].sg[0] == s->band[band].sg[2]) ? 128 : -128; + wd3 += (wd2 >> 7); + 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_decode_state_t *g722_decode_init(g722_decode_state_t *s, int rate, int options) +{ + if (s == NULL) + { + if ((s = (g722_decode_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_decode_release(g722_decode_state_t *s) +{ + free(s); + return 0; +} +/*- End of function --------------------------------------------------------*/ + +int g722_decode(g722_decode_state_t *s, int16_t amp[], const uint8_t g722_data[], int len) +{ + 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 wh[3] = {0, -214, 798}; + static const int rh2[4] = {2, 1, 2, 1}; + static const int qm2[4] = {-7408, -1616, 7408, 1616}; + static const int qm4[16] = + { + 0, -20456, -12896, -8968, + -6288, -4240, -2584, -1200, + 20456, 12896, 8968, 6288, + 4240, 2584, 1200, 0 + }; + static const int qm5[32] = + { + -280, -280, -23352, -17560, + -14120, -11664, -9752, -8184, + -6864, -5712, -4696, -3784, + -2960, -2208, -1520, -880, + 23352, 17560, 14120, 11664, + 9752, 8184, 6864, 5712, + 4696, 3784, 2960, 2208, + 1520, 880, 280, -280 + }; + static const int qm6[64] = + { + -136, -136, -136, -136, + -24808, -21904, -19008, -16704, + -14984, -13512, -12280, -11192, + -10232, -9360, -8576, -7856, + -7192, -6576, -6000, -5456, + -4944, -4464, -4008, -3576, + -3168, -2776, -2400, -2032, + -1688, -1360, -1040, -728, + 24808, 21904, 19008, 16704, + 14984, 13512, 12280, 11192, + 10232, 9360, 8576, 7856, + 7192, 6576, 6000, 5456, + 4944, 4464, 4008, 3576, + 3168, 2776, 2400, 2032, + 1688, 1360, 1040, 728, + 432, 136, -432, -136 + }; + static const int qmf_coeffs[12] = + { + 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11, + }; + + int dlowt; + int rlow; + int ihigh; + int dhigh; + int rhigh; + int xout1; + int xout2; + int wd1; + int wd2; + int wd3; + int code; + int outlen; + int i; + int j; + + outlen = 0; + rhigh = 0; + for (j = 0; j < len; ) + { + if (s->packed) + { + /* Unpack the code bits */ + if (s->in_bits < s->bits_per_sample) + { + s->in_buffer |= (g722_data[j++] << s->in_bits); + s->in_bits += 8; + } + code = s->in_buffer & ((1 << s->bits_per_sample) - 1); + s->in_buffer >>= s->bits_per_sample; + s->in_bits -= s->bits_per_sample; + } + else + { + code = g722_data[j++]; + } + + switch (s->bits_per_sample) + { + default: + case 8: + wd1 = code & 0x3F; + ihigh = (code >> 6) & 0x03; + wd2 = qm6[wd1]; + wd1 >>= 2; + break; + case 7: + wd1 = code & 0x1F; + ihigh = (code >> 5) & 0x03; + wd2 = qm5[wd1]; + wd1 >>= 1; + break; + case 6: + wd1 = code & 0x0F; + ihigh = (code >> 4) & 0x03; + wd2 = qm4[wd1]; + break; + } + /* Block 5L, LOW BAND INVQBL */ + wd2 = (s->band[0].det*wd2) >> 15; + /* Block 5L, RECONS */ + rlow = s->band[0].s + wd2; + /* Block 6L, LIMIT */ + if (rlow > 16383) + rlow = 16383; + else if (rlow < -16384) + rlow = -16384; + + /* Block 2L, INVQAL */ + wd2 = qm4[wd1]; + dlowt = (s->band[0].det*wd2) >> 15; + + /* Block 3L, LOGSCL */ + wd2 = rl42[wd1]; + wd1 = (s->band[0].nb*127) >> 7; + wd1 += wl[wd2]; + if (wd1 < 0) + wd1 = 0; + else if (wd1 > 18432) + wd1 = 18432; + s->band[0].nb = wd1; + + /* 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, dlowt); + + if (!s->eight_k) + { + /* Block 2H, INVQAH */ + wd2 = qm2[ihigh]; + dhigh = (s->band[1].det*wd2) >> 15; + /* Block 5H, RECONS */ + rhigh = dhigh + s->band[1].s; + /* Block 6H, LIMIT */ + if (rhigh > 16383) + rhigh = 16383; + else if (rhigh < -16384) + rhigh = -16384; + + /* Block 2H, INVQAH */ + wd2 = rh2[ihigh]; + wd1 = (s->band[1].nb*127) >> 7; + wd1 += wh[wd2]; + if (wd1 < 0) + wd1 = 0; + else if (wd1 > 22528) + wd1 = 22528; + s->band[1].nb = wd1; + + /* 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); + } + + if (s->itu_test_mode) + { + amp[outlen++] = (int16_t) (rlow << 1); + amp[outlen++] = (int16_t) (rhigh << 1); + } + else + { + if (s->eight_k) + { + amp[outlen++] = (int16_t) rlow; + } + else + { + /* Apply the receive QMF */ + for (i = 0; i < 22; i++) + s->x[i] = s->x[i + 2]; + s->x[22] = rlow + rhigh; + s->x[23] = rlow - rhigh; + + xout1 = 0; + xout2 = 0; + for (i = 0; i < 12; i++) + { + xout2 += s->x[2*i]*qmf_coeffs[i]; + xout1 += s->x[2*i + 1]*qmf_coeffs[11 - i]; + } + amp[outlen++] = (int16_t) (xout1 >> 12); + amp[outlen++] = (int16_t) (xout2 >> 12); + } + } + } + return outlen; +} +/*- End of function --------------------------------------------------------*/ +/*- End of file ------------------------------------------------------------*/ diff --git a/codecs/g722/g722_encode.c b/codecs/g722/g722_encode.c new file mode 100644 index 0000000000..ad7e6b522b --- /dev/null +++ b/codecs/g722/g722_encode.c @@ -0,0 +1,400 @@ +/* + * SpanDSP - a series of DSP components for telephony + * + * g722_encode.c - The ITU G.722 codec, encode part. + * + * Written by Steve Underwood + * + * 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 +#endif + +#include +#include +#include +#include +#if 0 +#include +#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 ------------------------------------------------------------*/ diff --git a/codecs/g722_slin_ex.h b/codecs/g722_slin_ex.h new file mode 100644 index 0000000000..f8d3de5d06 --- /dev/null +++ b/codecs/g722_slin_ex.h @@ -0,0 +1,25 @@ +/*! \file + * \brief g722_slin_ex.h -- + * + * 4-bit ADPCM data, 20 milliseconds worth at 8 kHz. + * + * Source: g723.example + * + * Copyright (C) 2001-2005, Digium Inc. + * + * Distributed under the terms of the GNU General Public License + * + */ + +static unsigned char g722_slin_ex[] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; diff --git a/codecs/slin_g722_ex.h b/codecs/slin_g722_ex.h new file mode 100644 index 0000000000..4e6aea84a7 --- /dev/null +++ b/codecs/slin_g722_ex.h @@ -0,0 +1,25 @@ +/*! \file + * \brief slin_g722_ex.h -- + * + * Signed 16-bit audio data, 10 milliseconds worth at 8 kHz. + * + * Source: g723.example + * + * Copyright (C) 2001-2005, Digium Inc. + * + * Distributed under the terms of the GNU General Public License + * + */ + +static signed short slin_g722_ex[] = { + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 +};