diff options
Diffstat (limited to 'trunk/codecs/codec_gsm.c')
| -rw-r--r-- | trunk/codecs/codec_gsm.c | 286 |
1 files changed, 0 insertions, 286 deletions
diff --git a/trunk/codecs/codec_gsm.c b/trunk/codecs/codec_gsm.c deleted file mode 100644 index bb4af8cfb..000000000 --- a/trunk/codecs/codec_gsm.c +++ /dev/null @@ -1,286 +0,0 @@ -/* - * Asterisk -- An open source telephony toolkit. - * - * The GSM code is from TOAST. Copyright information for that package is available - * in the GSM directory. - * - * Copyright (C) 1999 - 2005, Digium, Inc. - * - * Mark Spencer <markster@digium.com> - * - * 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 Translate between signed linear and Global System for Mobile Communications (GSM) - * - * \ingroup codecs - */ - -/*** MODULEINFO - <depend>gsm</depend> - ***/ - -#include "asterisk.h" - -ASTERISK_FILE_VERSION(__FILE__, "$Revision$") - -#include "asterisk/translate.h" -#include "asterisk/config.h" -#include "asterisk/module.h" -#include "asterisk/utils.h" - -#ifdef HAVE_GSM_HEADER -#include "gsm.h" -#elif defined(HAVE_GSM_GSM_HEADER) -#include <gsm/gsm.h> -#endif - -#include "../formats/msgsm.h" - -/* Sample frame data */ -#include "slin_gsm_ex.h" -#include "gsm_slin_ex.h" - -#define BUFFER_SAMPLES 8000 -#define GSM_SAMPLES 160 -#define GSM_FRAME_LEN 33 -#define MSGSM_FRAME_LEN 65 - -struct gsm_translator_pvt { /* both gsm2lin and lin2gsm */ - gsm gsm; - int16_t buf[BUFFER_SAMPLES]; /* lin2gsm, temporary storage */ -}; - -static int gsm_new(struct ast_trans_pvt *pvt) -{ - struct gsm_translator_pvt *tmp = pvt->pvt; - - return (tmp->gsm = gsm_create()) ? 0 : -1; -} - -static struct ast_frame *lintogsm_sample(void) -{ - static struct ast_frame f; - f.frametype = AST_FRAME_VOICE; - f.subclass = AST_FORMAT_SLINEAR; - f.datalen = sizeof(slin_gsm_ex); - /* Assume 8000 Hz */ - f.samples = sizeof(slin_gsm_ex)/2; - f.mallocd = 0; - f.offset = 0; - f.src = __PRETTY_FUNCTION__; - f.data = slin_gsm_ex; - return &f; -} - -static struct ast_frame *gsmtolin_sample(void) -{ - static struct ast_frame f; - f.frametype = AST_FRAME_VOICE; - f.subclass = AST_FORMAT_GSM; - f.datalen = sizeof(gsm_slin_ex); - /* All frames are 20 ms long */ - f.samples = GSM_SAMPLES; - f.mallocd = 0; - f.offset = 0; - f.src = __PRETTY_FUNCTION__; - f.data = gsm_slin_ex; - return &f; -} - -/*! \brief decode and store in outbuf. */ -static int gsmtolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f) -{ - struct gsm_translator_pvt *tmp = pvt->pvt; - int x; - int16_t *dst = (int16_t *)pvt->outbuf; - /* guess format from frame len. 65 for MSGSM, 33 for regular GSM */ - int flen = (f->datalen % MSGSM_FRAME_LEN == 0) ? - MSGSM_FRAME_LEN : GSM_FRAME_LEN; - - for (x=0; x < f->datalen; x += flen) { - unsigned char data[2 * GSM_FRAME_LEN]; - unsigned char *src; - int len; - if (flen == MSGSM_FRAME_LEN) { - len = 2*GSM_SAMPLES; - src = data; - /* Translate MSGSM format to Real GSM format before feeding in */ - /* XXX what's the point here! we should just work - * on the full format. - */ - conv65(f->data + x, data); - } else { - len = GSM_SAMPLES; - src = f->data + x; - } - /* XXX maybe we don't need to check */ - if (pvt->samples + len > BUFFER_SAMPLES) { - ast_log(LOG_WARNING, "Out of buffer space\n"); - return -1; - } - if (gsm_decode(tmp->gsm, src, dst + pvt->samples)) { - ast_log(LOG_WARNING, "Invalid GSM data (1)\n"); - return -1; - } - pvt->samples += GSM_SAMPLES; - pvt->datalen += 2 * GSM_SAMPLES; - if (flen == MSGSM_FRAME_LEN) { - if (gsm_decode(tmp->gsm, data + GSM_FRAME_LEN, dst + pvt->samples)) { - ast_log(LOG_WARNING, "Invalid GSM data (2)\n"); - return -1; - } - pvt->samples += GSM_SAMPLES; - pvt->datalen += 2 * GSM_SAMPLES; - } - } - return 0; -} - -/*! \brief store samples into working buffer for later decode */ -static int lintogsm_framein(struct ast_trans_pvt *pvt, struct ast_frame *f) -{ - struct gsm_translator_pvt *tmp = pvt->pvt; - - /* XXX We should look at how old the rest of our stream is, and if it - is too old, then we should overwrite it entirely, otherwise we can - get artifacts of earlier talk that do not belong */ - if (pvt->samples + f->samples > BUFFER_SAMPLES) { - ast_log(LOG_WARNING, "Out of buffer space\n"); - return -1; - } - memcpy(tmp->buf + pvt->samples, f->data, f->datalen); - pvt->samples += f->samples; - return 0; -} - -/*! \brief encode and produce a frame */ -static struct ast_frame *lintogsm_frameout(struct ast_trans_pvt *pvt) -{ - struct gsm_translator_pvt *tmp = pvt->pvt; - int datalen = 0; - int samples = 0; - - /* We can't work on anything less than a frame in size */ - if (pvt->samples < GSM_SAMPLES) - return NULL; - while (pvt->samples >= GSM_SAMPLES) { - /* Encode a frame of data */ - gsm_encode(tmp->gsm, tmp->buf + samples, (gsm_byte *) pvt->outbuf + datalen); - datalen += GSM_FRAME_LEN; - samples += GSM_SAMPLES; - pvt->samples -= GSM_SAMPLES; - } - - /* Move the data at the end of the buffer to the front */ - if (pvt->samples) - memmove(tmp->buf, tmp->buf + samples, pvt->samples * 2); - - return ast_trans_frameout(pvt, datalen, samples); -} - -static void gsm_destroy_stuff(struct ast_trans_pvt *pvt) -{ - struct gsm_translator_pvt *tmp = pvt->pvt; - if (tmp->gsm) - gsm_destroy(tmp->gsm); -} - -static struct ast_translator gsmtolin = { - .name = "gsmtolin", - .srcfmt = AST_FORMAT_GSM, - .dstfmt = AST_FORMAT_SLINEAR, - .newpvt = gsm_new, - .framein = gsmtolin_framein, - .destroy = gsm_destroy_stuff, - .sample = gsmtolin_sample, - .buffer_samples = BUFFER_SAMPLES, - .buf_size = BUFFER_SAMPLES * 2, - .desc_size = sizeof (struct gsm_translator_pvt ), - .plc_samples = GSM_SAMPLES, -}; - -static struct ast_translator lintogsm = { - .name = "lintogsm", - .srcfmt = AST_FORMAT_SLINEAR, - .dstfmt = AST_FORMAT_GSM, - .newpvt = gsm_new, - .framein = lintogsm_framein, - .frameout = lintogsm_frameout, - .destroy = gsm_destroy_stuff, - .sample = lintogsm_sample, - .desc_size = sizeof (struct gsm_translator_pvt ), - .buf_size = (BUFFER_SAMPLES * GSM_FRAME_LEN + GSM_SAMPLES - 1)/GSM_SAMPLES, -}; - - -static int parse_config(int reload) -{ - struct ast_variable *var; - struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 }; - struct ast_config *cfg = ast_config_load("codecs.conf", config_flags); - if (cfg == NULL) - return 0; - if (cfg == CONFIG_STATUS_FILEUNCHANGED) - return 0; - for (var = ast_variable_browse(cfg, "plc"); var; var = var->next) { - if (!strcasecmp(var->name, "genericplc")) { - gsmtolin.useplc = ast_true(var->value) ? 1 : 0; - ast_verb(3, "codec_gsm: %susing generic PLC\n", gsmtolin.useplc ? "" : "not "); - } - } - ast_config_destroy(cfg); - return 0; -} - -/*! \brief standard module glue */ -static int reload(void) -{ - if (parse_config(1)) { - return AST_MODULE_LOAD_DECLINE; - } - return AST_MODULE_LOAD_SUCCESS; -} - -static int unload_module(void) -{ - int res; - - res = ast_unregister_translator(&lintogsm); - if (!res) - res = ast_unregister_translator(&gsmtolin); - - return res; -} - -static int load_module(void) -{ - int res; - - if (parse_config(0)) - return AST_MODULE_LOAD_DECLINE; - res = ast_register_translator(&gsmtolin); - if (!res) - res=ast_register_translator(&lintogsm); - else - ast_unregister_translator(&gsmtolin); - if (res) - return AST_MODULE_LOAD_FAILURE; - return AST_MODULE_LOAD_SUCCESS; -} - -AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "GSM Coder/Decoder", - .load = load_module, - .unload = unload_module, - .reload = reload, - ); |