236 lines
6.2 KiB
C
236 lines
6.2 KiB
C
/*
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* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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* Copyright (C) 2005/2006, Anthony Minessale II <anthmct@yahoo.com>
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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 / Soft-Switch Application
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*
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* The Initial Developer of the Original Code is
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* Anthony Minessale II <anthmct@yahoo.com>
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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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*
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* Anthony Minessale II <anthmct@yahoo.com>
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* Brian K. West <brian.west@mac.com>
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*
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* The g723.1 codec itself is not distributed with this module.
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*
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* mod_g723.c -- G723.1 Codec Module
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*
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*/
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#include "switch.h"
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#ifndef G723_PASSTHROUGH
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#include "g723.h"
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#define TYPE_HIGH 0x0
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#define TYPE_LOW 0x1
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#define TYPE_SILENCE 0x2
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#define TYPE_DONTSEND 0x3
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#define TYPE_MASK 0x3
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Flag UsePf = True;
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Flag UseHp = True;
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Flag UseVx = True;
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enum Crate WrkRate = Rate63;
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#endif
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static const char modname[] = "mod_g723_1";
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#ifndef G723_PASSTHROUGH
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struct g723_context {
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struct cod_state encoder_object;
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struct dec_state decoder_object;
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float cod_float_buf[Frame];
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float dec_float_buf[Frame];
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};
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#endif
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static switch_status_t switch_g723_init(switch_codec_t *codec, switch_codec_flag_t flags,
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const switch_codec_settings_t *codec_settings)
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{
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#ifdef G723_PASSTHROUGH
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codec->flags |= SWITCH_CODEC_FLAG_PASSTHROUGH;
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return SWITCH_STATUS_FALSE;
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#else
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struct g723_context *context = NULL;
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int encoding, decoding;
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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) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(struct g723_context))))) {
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return SWITCH_STATUS_FALSE;
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} else {
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if (encoding) {
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Init_Coder(&context->encoder_object);
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if( UseVx ) {
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Init_Vad(&context->encoder_object);
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Init_Cod_Cng(&context->encoder_object);
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}
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}
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if (decoding) {
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Init_Decod(&context->decoder_object);
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Init_Dec_Cng(&context->decoder_object);
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}
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codec->private_info = context;
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return SWITCH_STATUS_SUCCESS;
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}
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#endif
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}
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static switch_status_t switch_g723_destroy(switch_codec_t *codec)
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{
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#ifndef G723_PASSTHROUGH
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codec->private_info = NULL;
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#endif
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_g723_encode(switch_codec_t *codec,
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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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#ifdef G723_PASSTHROUGH
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "This codec is only usable in passthrough mode!\n");
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return SWITCH_STATUS_FALSE;
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#else
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struct g723_context *context = codec->private_info;
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int16_t *decoded_slin_buf = (int16_t *) decoded_data;
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char *ebuf = (char *) encoded_data;
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int x;
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if (!context) {
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return SWITCH_STATUS_FALSE;
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}
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for(x = 0; x < Frame; x++) {
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context->cod_float_buf[x] = decoded_slin_buf[x];
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}
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Coder(&context->encoder_object, (FLOAT *)context->cod_float_buf, ebuf);
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*encoded_data_len = codec->implementation->encoded_bytes_per_frame;
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return SWITCH_STATUS_SUCCESS;
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#endif
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}
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static switch_status_t switch_g723_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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#ifdef G723_PASSTHROUGH
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "This codec is only usable in passthrough mode!\n");
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return SWITCH_STATUS_FALSE;
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#else
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struct g723_context *context = codec->private_info;
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int x;
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int16_t *to_slin_buf = decoded_data;
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if (!context) {
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return SWITCH_STATUS_FALSE;
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}
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Decod(&context->decoder_object, (FLOAT *) context->dec_float_buf, (char *) decoded_data, 0);
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for (x=0;x<Frame;x++) {
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to_slin_buf[x] = context->dec_float_buf[x];
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}
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*decoded_data_len = codec->implementation->bytes_per_frame;
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return SWITCH_STATUS_SUCCESS;
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#endif
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}
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/* Registration */
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static const switch_codec_implementation_t g723_1_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 4,
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/*.iananame */ "G723",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 6300,
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/*.microseconds_per_frame */ 30000,
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/*.samples_per_frame */ 240,
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/*.bytes_per_frame */ 480,
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/*.encoded_bytes_per_frame */ 24,
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/*.number_of_channels */ 1,
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/*.pref_frames_per_packet */ 1,
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/*.max_frames_per_packet */ 4,
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/*.init */ switch_g723_init,
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/*.encode */ switch_g723_encode,
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/*.decode */ switch_g723_decode,
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/*.destroy */ switch_g723_destroy,
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};
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static const switch_codec_interface_t g723_1_codec_interface = {
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/*.interface_name */ "g723.1 6.3k",
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/*.implementations */ &g723_1_implementation,
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};
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static switch_loadable_module_interface_t g723_module_interface = {
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/*.module_name */ modname,
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/*.endpoint_interface */ NULL,
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/*.timer_interface */ NULL,
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/*.dialplan_interface */ NULL,
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/*.codec_interface */ &g723_1_codec_interface,
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/*.application_interface */ NULL
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};
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SWITCH_MOD_DECLARE(switch_status_t) switch_module_load(const switch_loadable_module_interface_t **module_interface,
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char *filename)
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{
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/* connect my internal structure to the blank pointer passed to me */
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*module_interface = &g723_module_interface;
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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:nil
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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 expandtab:
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*/
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