You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
213 lines
7.5 KiB
213 lines
7.5 KiB
/*
|
|
* Version: MPL 1.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
|
|
*
|
|
* Portions created by the Initial Developer are Copyright (C)
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* <mkrivushin@yandex.ru> for fsg729 ( which used IPP media libraries )
|
|
* Matteo Brancaleoni <mbrancaleoni@gmail.com>
|
|
*
|
|
* The bcg729 codec itself is not distributed with this module.
|
|
*
|
|
* mod_bcg729.c -- G.729 Codec Module
|
|
*
|
|
*/
|
|
|
|
#include "switch.h"
|
|
#include "bcg729/encoder.h"
|
|
#include "bcg729/decoder.h"
|
|
|
|
SWITCH_MODULE_LOAD_FUNCTION(mod_bcg729_load);
|
|
SWITCH_MODULE_DEFINITION(mod_bcg729, mod_bcg729_load, NULL, NULL);
|
|
|
|
struct bcg729_context {
|
|
bcg729DecoderChannelContextStruct *decoder_object;
|
|
bcg729EncoderChannelContextStruct *encoder_object;
|
|
};
|
|
|
|
static switch_status_t switch_bcg729_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings)
|
|
{
|
|
struct bcg729_context *context = NULL;
|
|
int encoding, decoding;
|
|
|
|
encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
|
|
decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
|
|
|
|
if (!(encoding || decoding) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(struct bcg729_context))))) {
|
|
return SWITCH_STATUS_FALSE;
|
|
} else {
|
|
/*
|
|
if (codec->fmtp_in) {
|
|
codec->fmtp_out = switch_core_strdup(codec->memory_pool, codec->fmtp_in);
|
|
}
|
|
*/
|
|
codec->fmtp_out = switch_core_strdup(codec->memory_pool, "annexb=no");
|
|
|
|
if (encoding) {
|
|
context->encoder_object = initBcg729EncoderChannel(0);
|
|
}
|
|
|
|
if (decoding) {
|
|
context->decoder_object = initBcg729DecoderChannel();
|
|
}
|
|
|
|
codec->private_info = context;
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
}
|
|
|
|
static switch_status_t switch_bcg729_destroy(switch_codec_t *codec)
|
|
{
|
|
struct bcg729_context *context = codec->private_info;
|
|
|
|
closeBcg729EncoderChannel(context->encoder_object);
|
|
closeBcg729DecoderChannel(context->decoder_object);
|
|
|
|
codec->private_info = NULL;
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t switch_bcg729_encode(switch_codec_t *codec,
|
|
switch_codec_t *other_codec,
|
|
void *decoded_data,
|
|
uint32_t decoded_data_len,
|
|
uint32_t decoded_rate, void *encoded_data, uint32_t *encoded_data_len, uint32_t *encoded_rate,
|
|
unsigned int *flag)
|
|
{
|
|
struct bcg729_context *context = codec->private_info;
|
|
|
|
if (!context) {
|
|
return SWITCH_STATUS_FALSE;
|
|
}
|
|
|
|
if (decoded_data_len % 160 == 0) {
|
|
uint32_t new_len = 0;
|
|
int16_t *ddp = decoded_data;
|
|
uint8_t *edp = encoded_data;
|
|
int x;
|
|
int loops = (int) decoded_data_len / 160;
|
|
|
|
for (x = 0; x < loops && new_len < *encoded_data_len; x++) {
|
|
uint8_t frameSize;
|
|
bcg729Encoder(context->encoder_object, ddp, edp, &frameSize);
|
|
edp += frameSize;
|
|
ddp += frameSize * 8;
|
|
new_len += frameSize;
|
|
}
|
|
|
|
if (new_len <= *encoded_data_len) {
|
|
*encoded_data_len = new_len;
|
|
} else {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "buffer overflow!!! %u >= %u\n", new_len, *encoded_data_len);
|
|
return SWITCH_STATUS_FALSE;
|
|
}
|
|
}
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t switch_bcg729_decode(switch_codec_t *codec,
|
|
switch_codec_t *other_codec,
|
|
void *encoded_data,
|
|
uint32_t encoded_data_len,
|
|
uint32_t encoded_rate,
|
|
void *decoded_data,
|
|
uint32_t *decoded_data_len,
|
|
uint32_t *decoded_rate,
|
|
unsigned int *flag)
|
|
{
|
|
struct bcg729_context *context = codec->private_info;
|
|
if (!context) {
|
|
return SWITCH_STATUS_FALSE;
|
|
}
|
|
|
|
int framesize;
|
|
int x;
|
|
uint32_t new_len = 0;
|
|
uint8_t *edp = encoded_data;
|
|
int16_t *ddp = decoded_data;
|
|
|
|
if (encoded_data_len == 0) { /* Native PLC interpolation */
|
|
bcg729Decoder(context->decoder_object, NULL, 0, 1, 0, 0, ddp);
|
|
ddp += 80;
|
|
decoded_data_len = (uint32_t *) 160;
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "g729 zero length frame\n");
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
for(x = 0; x < encoded_data_len && new_len < *decoded_data_len; x += framesize) {
|
|
uint8_t isSID = (encoded_data_len - x < 8) ? 1 : 0;
|
|
framesize = (isSID==1) ? 2 : 10;
|
|
|
|
bcg729Decoder(context->decoder_object, edp, encoded_data_len, 0, isSID, 0, ddp);
|
|
ddp += 80;
|
|
edp += framesize;
|
|
new_len += 160;
|
|
}
|
|
|
|
if (new_len <= *decoded_data_len) {
|
|
*decoded_data_len = new_len;
|
|
} else {
|
|
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "buffer overflow!!!\n");
|
|
return SWITCH_STATUS_FALSE;
|
|
}
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
SWITCH_MODULE_LOAD_FUNCTION(mod_bcg729_load)
|
|
{
|
|
switch_codec_interface_t *codec_interface;
|
|
int mpf = 10000, spf = 80, bpf = 160, ebpf = 10, count;
|
|
|
|
/* connect my internal structure to the blank pointer passed to me */
|
|
*module_interface = switch_loadable_module_create_module_interface(pool, modname);
|
|
|
|
SWITCH_ADD_CODEC(codec_interface, "G.729");
|
|
for (count = 12; count > 0; count--) {
|
|
switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO,
|
|
18, /* the IANA code number */
|
|
"G729", /* the IANA code name */
|
|
"annexb=no", /* default fmtp to send (can be overridden by the init function) */
|
|
8000, /* samples transferred per second */
|
|
8000, /* actual samples transferred per second */
|
|
8000, /* bits transferred per second */
|
|
mpf * count, /* number of microseconds per frame */
|
|
spf * count, /* number of samples per frame */
|
|
bpf * count, /* number of bytes per frame decompressed */
|
|
ebpf * count, /* number of bytes per frame compressed */
|
|
1, /* number of channels represented */
|
|
count * 10, /* number of frames per network packet */
|
|
switch_bcg729_init, /* function to initialize a codec handle using this implementation */
|
|
switch_bcg729_encode, /* function to encode raw data into encoded data */
|
|
switch_bcg729_decode, /* function to decode encoded data into raw data */
|
|
switch_bcg729_destroy); /* deinitalize a codec handle using this implementation */
|
|
}
|
|
/* indicate that the module should continue to be loaded */
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* For Emacs:
|
|
* Local Variables:
|
|
* mode:c
|
|
* indent-tabs-mode:t
|
|
* tab-width:4
|
|
* c-basic-offset:4
|
|
* End:
|
|
* For VIM:
|
|
* vim:set softtabstop=4 shiftwidth=4 tabstop=4:
|
|
*/
|