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https://github.com/signalwire/freeswitch.git
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284 lines
7.2 KiB
C
284 lines
7.2 KiB
C
/*
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* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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* Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
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*
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is FreeSWITCH Modular Media Switching Software Library / ISAC codec module
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*
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* The Initial Developer of the Original Code is
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* Anthony Minessale II <anthm@freeswitch.org>
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* Portions created by the Initial Developer are Copyright (C)
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Anthony Minessale II <anthm@freeswitch.org>
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*
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*
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* mod_isac.c -- isac Codec Module
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*
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*/
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#include <switch.h>
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#include "isac.h"
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SWITCH_MODULE_LOAD_FUNCTION(mod_isac_codec_load);
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SWITCH_MODULE_DEFINITION(mod_isac, mod_isac_codec_load, NULL, NULL);
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struct isac_context {
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ISACStruct *ISAC_main_inst;
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};
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static switch_status_t switch_isac_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings)
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{
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uint32_t encoding, decoding;
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WebRtc_Word16 err;
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struct isac_context *context = NULL;
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encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
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decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
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if (!(encoding || decoding)) {
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return SWITCH_STATUS_FALSE;
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}
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if (!(context = switch_core_alloc(codec->memory_pool, sizeof(*context)))) {
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return SWITCH_STATUS_FALSE;
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}
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codec->private_info = context;
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err = WebRtcIsac_Create(&context->ISAC_main_inst);
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if (err < 0) return SWITCH_STATUS_FALSE;
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if (encoding) {
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if (WebRtcIsac_EncoderInit(context->ISAC_main_inst, 0) < 0) {
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return SWITCH_STATUS_FALSE;
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}
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WebRtcIsac_SetEncSampRate(context->ISAC_main_inst, codec->implementation->actual_samples_per_second / 1000);
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}
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if (decoding) {
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if (WebRtcIsac_DecoderInit(context->ISAC_main_inst) < 0) {
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return SWITCH_STATUS_FALSE;
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}
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WebRtcIsac_SetDecSampRate(context->ISAC_main_inst, codec->implementation->actual_samples_per_second / 1000);
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}
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if (codec->implementation->actual_samples_per_second == 16000) {
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if (WebRtcIsac_ControlBwe(context->ISAC_main_inst, 32000, codec->implementation->microseconds_per_packet / 1000, 1) < 0) {
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return SWITCH_STATUS_FALSE;
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}
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if (WebRtcIsac_SetMaxPayloadSize(context->ISAC_main_inst, 400) < 0) {
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return SWITCH_STATUS_FALSE;
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}
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} else {
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if (WebRtcIsac_Control(context->ISAC_main_inst, 32000, codec->implementation->microseconds_per_packet / 1000) < 0) {
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return SWITCH_STATUS_FALSE;
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}
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if (WebRtcIsac_SetMaxPayloadSize(context->ISAC_main_inst, 600) < 0) {
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return SWITCH_STATUS_FALSE;
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}
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}
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if (WebRtcIsac_SetMaxRate(context->ISAC_main_inst, codec->implementation->bits_per_second) < 0) {
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return SWITCH_STATUS_FALSE;
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}
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_isac_encode(switch_codec_t *codec, switch_codec_t *other_codec,
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void *decoded_data,
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uint32_t decoded_data_len,
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uint32_t decoded_rate,
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void *encoded_data,
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uint32_t *encoded_data_len,
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uint32_t *encoded_rate,
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unsigned int *flag)
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{
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struct isac_context *context = codec->private_info;
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WebRtc_Word16 len = 0, *in, *out;
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int rise = (codec->implementation->actual_samples_per_second / 100);
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in = decoded_data;
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out = encoded_data;
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while(len == 0) {
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len = WebRtcIsac_Encode(context->ISAC_main_inst, in, out);
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in += rise;
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}
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if (len < 0) {
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return SWITCH_STATUS_GENERR;
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}
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*encoded_data_len = (uint32_t) len;
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_isac_decode(switch_codec_t *codec,
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switch_codec_t *other_codec,
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void *encoded_data,
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uint32_t encoded_data_len,
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uint32_t encoded_rate,
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void *decoded_data,
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uint32_t *decoded_data_len,
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uint32_t *decoded_rate,
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unsigned int *flag)
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{
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struct isac_context *context = codec->private_info;
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WebRtc_Word16 len, speechType[1];
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if ((*flag & SFF_PLC)) {
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len = WebRtcIsac_DecodePlc(context->ISAC_main_inst, decoded_data, 1);
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} else {
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len = WebRtcIsac_Decode(context->ISAC_main_inst, encoded_data, encoded_data_len, decoded_data, speechType);
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}
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if (len < 0) {
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*decoded_data_len = 0;
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return SWITCH_STATUS_GENERR;
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}
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*decoded_data_len = (uint32_t) len * 2;
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_isac_destroy(switch_codec_t *codec)
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{
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struct isac_context *context = codec->private_info;
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WebRtcIsac_Free(context->ISAC_main_inst);
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return SWITCH_STATUS_SUCCESS;
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}
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SWITCH_MODULE_LOAD_FUNCTION(mod_isac_codec_load)
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{
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switch_codec_interface_t *codec_interface;
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*module_interface = switch_loadable_module_create_module_interface(pool, modname);
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SWITCH_ADD_CODEC(codec_interface, "isac"); /* 8.0kbit */
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switch_core_codec_add_implementation(pool, codec_interface,
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SWITCH_CODEC_TYPE_AUDIO,
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99,
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"isac",
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"ibitrate=32000;maxbitrate=53400",
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16000,
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16000,
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53400,
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30000,
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480,
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960,
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0,
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1,
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3,
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switch_isac_init,
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switch_isac_encode,
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switch_isac_decode,
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switch_isac_destroy);
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switch_core_codec_add_implementation(pool, codec_interface,
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SWITCH_CODEC_TYPE_AUDIO,
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99,
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"isac",
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"ibitrate=32000;maxbitrate=53400",
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16000,
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16000,
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53400,
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60000,
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960,
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1920,
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0,
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1,
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6,
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switch_isac_init,
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switch_isac_encode,
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switch_isac_decode,
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switch_isac_destroy);
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switch_core_codec_add_implementation(pool, codec_interface,
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SWITCH_CODEC_TYPE_AUDIO,
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99,
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"isac",
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"ibitrate=32000;maxbitrate=160000",
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32000,
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32000,
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160000,
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30000,
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960,
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1920,
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0,
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1,
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6,
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switch_isac_init,
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switch_isac_encode,
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switch_isac_decode,
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switch_isac_destroy);
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switch_core_codec_add_implementation(pool, codec_interface,
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SWITCH_CODEC_TYPE_AUDIO,
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99,
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"isac",
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"ibitrate=32000;maxbitrate=160000",
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32000,
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32000,
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160000,
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60000,
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1920,
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3840,
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0,
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1,
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6,
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switch_isac_init,
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switch_isac_encode,
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switch_isac_decode,
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switch_isac_destroy);
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/* indicate that the module should continue to be loaded */
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return SWITCH_STATUS_SUCCESS;
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}
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/* For Emacs:
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* Local Variables:
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* mode:c
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* indent-tabs-mode:t
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* tab-width:4
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* c-basic-offset:4
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* End:
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* For VIM:
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* vim:set softtabstop=4 shiftwidth=4 tabstop=4 noet:
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*/
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