421 lines
12 KiB
C
421 lines
12 KiB
C
/*
|
|
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
|
|
* Copyright (C) 2005/2006, Anthony Minessale II <anthmct@yahoo.com>
|
|
*
|
|
* 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
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Anthony Minessale II <anthmct@yahoo.com>
|
|
* Portions created by the Initial Developer are Copyright (C)
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
* Anthony Minessale II <anthmct@yahoo.com>
|
|
*
|
|
*
|
|
* mod_g711.c -- G711 Ulaw/Alaw Codec Module
|
|
*
|
|
*/
|
|
#include <switch.h>
|
|
#include <g7xx/g711.h>
|
|
|
|
SWITCH_MODULE_LOAD_FUNCTION(mod_g711_load);
|
|
SWITCH_MODULE_DEFINITION(mod_g711, mod_g711_load, NULL, NULL);
|
|
|
|
static switch_status_t switch_g711u_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings)
|
|
{
|
|
int encoding, decoding;
|
|
|
|
encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
|
|
decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
|
|
|
|
if (!(encoding || decoding)) {
|
|
return SWITCH_STATUS_FALSE;
|
|
} else {
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
}
|
|
|
|
static switch_status_t switch_g711u_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)
|
|
{
|
|
short *dbuf;
|
|
unsigned char *ebuf;
|
|
uint32_t i;
|
|
|
|
dbuf = decoded_data;
|
|
ebuf = encoded_data;
|
|
|
|
for (i = 0; i < decoded_data_len / sizeof(short); i++) {
|
|
ebuf[i] = linear_to_ulaw(dbuf[i]);
|
|
}
|
|
|
|
*encoded_data_len = i;
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t switch_g711u_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)
|
|
{
|
|
short *dbuf;
|
|
unsigned char *ebuf;
|
|
uint32_t i;
|
|
|
|
dbuf = decoded_data;
|
|
ebuf = encoded_data;
|
|
|
|
if (*flag & SWITCH_CODEC_FLAG_SILENCE) {
|
|
memset(dbuf, 0, codec->implementation->bytes_per_frame);
|
|
*decoded_data_len = codec->implementation->bytes_per_frame;
|
|
} else {
|
|
for (i = 0; i < encoded_data_len; i++) {
|
|
dbuf[i] = ulaw_to_linear(ebuf[i]);
|
|
}
|
|
|
|
*decoded_data_len = i * 2;
|
|
}
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t switch_g711u_destroy(switch_codec_t *codec)
|
|
{
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
static switch_status_t switch_g711a_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings)
|
|
{
|
|
int encoding, decoding;
|
|
|
|
encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
|
|
decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
|
|
|
|
if (!(encoding || decoding)) {
|
|
return SWITCH_STATUS_FALSE;
|
|
} else {
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
}
|
|
|
|
static switch_status_t switch_g711a_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)
|
|
{
|
|
short *dbuf;
|
|
unsigned char *ebuf;
|
|
uint32_t i;
|
|
|
|
dbuf = decoded_data;
|
|
ebuf = encoded_data;
|
|
|
|
for (i = 0; i < decoded_data_len / sizeof(short); i++) {
|
|
ebuf[i] = linear_to_alaw(dbuf[i]);
|
|
}
|
|
|
|
*encoded_data_len = i;
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t switch_g711a_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)
|
|
{
|
|
short *dbuf;
|
|
unsigned char *ebuf;
|
|
uint32_t i;
|
|
|
|
dbuf = decoded_data;
|
|
ebuf = encoded_data;
|
|
|
|
if (*flag & SWITCH_CODEC_FLAG_SILENCE) {
|
|
memset(dbuf, 0, codec->implementation->bytes_per_frame);
|
|
*decoded_data_len = codec->implementation->bytes_per_frame;
|
|
} else {
|
|
for (i = 0; i < encoded_data_len; i++) {
|
|
dbuf[i] = alaw_to_linear(ebuf[i]);
|
|
}
|
|
|
|
*decoded_data_len = i * 2;
|
|
}
|
|
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
static switch_status_t switch_g711a_destroy(switch_codec_t *codec)
|
|
{
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* Registration */
|
|
|
|
static switch_codec_implementation_t g711u_8k_120ms_implementation = {
|
|
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
|
/*.ianacode */ 0,
|
|
/*.iananame */ "PCMU",
|
|
/*.fmtp */ NULL,
|
|
/*.samples_per_second */ 8000,
|
|
/*.actual_samples_per_second */ 8000,
|
|
/*.bits_per_second */ 64000,
|
|
/*.microseconds_per_frame */ 120000,
|
|
/*.samples_per_frame */ 960,
|
|
/*.bytes_per_frame */ 1920,
|
|
/*.encoded_bytes_per_frame */ 960,
|
|
/*.number_of_channels */ 1,
|
|
/*.pref_frames_per_packet */ 1,
|
|
/*.max_frames_per_packet */ 1,
|
|
/*.init */ switch_g711u_init,
|
|
/*.encode */ switch_g711u_encode,
|
|
/*.decode */ switch_g711u_decode,
|
|
/*.destroy */ switch_g711u_destroy
|
|
};
|
|
|
|
static switch_codec_implementation_t g711u_8k_60ms_implementation = {
|
|
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
|
/*.ianacode */ 0,
|
|
/*.iananame */ "PCMU",
|
|
/*.fmtp */ NULL,
|
|
/*.samples_per_second */ 8000,
|
|
/*.actual_samples_per_second */ 8000,
|
|
/*.bits_per_second */ 64000,
|
|
/*.microseconds_per_frame */ 60000,
|
|
/*.samples_per_frame */ 480,
|
|
/*.bytes_per_frame */ 960,
|
|
/*.encoded_bytes_per_frame */ 480,
|
|
/*.number_of_channels */ 1,
|
|
/*.pref_frames_per_packet */ 1,
|
|
/*.max_frames_per_packet */ 1,
|
|
/*.init */ switch_g711u_init,
|
|
/*.encode */ switch_g711u_encode,
|
|
/*.decode */ switch_g711u_decode,
|
|
/*.destroy */ switch_g711u_destroy,
|
|
/*.next */ &g711u_8k_120ms_implementation
|
|
};
|
|
|
|
static switch_codec_implementation_t g711u_8k_30ms_implementation = {
|
|
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
|
/*.ianacode */ 0,
|
|
/*.iananame */ "PCMU",
|
|
/*.fmtp */ NULL,
|
|
/*.samples_per_second */ 8000,
|
|
/*.actual_samples_per_second */ 8000,
|
|
/*.bits_per_second */ 64000,
|
|
/*.microseconds_per_frame */ 30000,
|
|
/*.samples_per_frame */ 240,
|
|
/*.bytes_per_frame */ 480,
|
|
/*.encoded_bytes_per_frame */ 240,
|
|
/*.number_of_channels */ 1,
|
|
/*.pref_frames_per_packet */ 1,
|
|
/*.max_frames_per_packet */ 1,
|
|
/*.init */ switch_g711u_init,
|
|
/*.encode */ switch_g711u_encode,
|
|
/*.decode */ switch_g711u_decode,
|
|
/*.destroy */ switch_g711u_destroy,
|
|
/*.next */ &g711u_8k_60ms_implementation
|
|
};
|
|
|
|
static switch_codec_implementation_t g711u_8k_20ms_implementation = {
|
|
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
|
/*.ianacode */ 0,
|
|
/*.iananame */ "PCMU",
|
|
/*.fmtp */ NULL,
|
|
/*.samples_per_second */ 8000,
|
|
/*.actual_samples_per_second */ 8000,
|
|
/*.bits_per_second */ 64000,
|
|
/*.microseconds_per_frame */ 20000,
|
|
/*.samples_per_frame */ 160,
|
|
/*.bytes_per_frame */ 320,
|
|
/*.encoded_bytes_per_frame */ 160,
|
|
/*.number_of_channels */ 1,
|
|
/*.pref_frames_per_packet */ 1,
|
|
/*.max_frames_per_packet */ 1,
|
|
/*.init */ switch_g711u_init,
|
|
/*.encode */ switch_g711u_encode,
|
|
/*.decode */ switch_g711u_decode,
|
|
/*.destroy */ switch_g711u_destroy,
|
|
/*.next */ &g711u_8k_30ms_implementation
|
|
};
|
|
|
|
static switch_codec_implementation_t g711u_8k_10ms_implementation = {
|
|
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
|
/*.ianacode */ 0,
|
|
/*.iananame */ "PCMU",
|
|
/*.fmtp */ NULL,
|
|
/*.samples_per_second */ 8000,
|
|
/*.actual_samples_per_second */ 8000,
|
|
/*.bits_per_second */ 64000,
|
|
/*.microseconds_per_frame */ 10000,
|
|
/*.samples_per_frame */ 80,
|
|
/*.bytes_per_frame */ 160,
|
|
/*.encoded_bytes_per_frame */ 80,
|
|
/*.number_of_channels */ 1,
|
|
/*.pref_frames_per_packet */ 1,
|
|
/*.max_frames_per_packet */ 1,
|
|
/*.init */ switch_g711u_init,
|
|
/*.encode */ switch_g711u_encode,
|
|
/*.decode */ switch_g711u_decode,
|
|
/*.destroy */ switch_g711u_destroy,
|
|
/*.next */ &g711u_8k_20ms_implementation
|
|
};
|
|
|
|
static switch_codec_implementation_t g711a_8k_120ms_implementation = {
|
|
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
|
/*.ianacode */ 8,
|
|
/*.iananame */ "PCMA",
|
|
/*.fmtp */ NULL,
|
|
/*.samples_per_second */ 8000,
|
|
/*.actual_samples_per_second */ 8000,
|
|
/*.bits_per_second */ 64000,
|
|
/*.microseconds_per_frame */ 120000,
|
|
/*.samples_per_frame */ 960,
|
|
/*.bytes_per_frame */ 1920,
|
|
/*.encoded_bytes_per_frame */ 960,
|
|
/*.number_of_channels */ 1,
|
|
/*.pref_frames_per_packet */ 1,
|
|
/*.max_frames_per_packet */ 1,
|
|
/*.init */ switch_g711a_init,
|
|
/*.encode */ switch_g711a_encode,
|
|
/*.decode */ switch_g711a_decode,
|
|
/*.destroy */ switch_g711a_destroy
|
|
};
|
|
|
|
static switch_codec_implementation_t g711a_8k_60ms_implementation = {
|
|
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
|
/*.ianacode */ 8,
|
|
/*.iananame */ "PCMA",
|
|
/*.fmtp */ NULL,
|
|
/*.samples_per_second */ 8000,
|
|
/*.actual_samples_per_second */ 8000,
|
|
/*.bits_per_second */ 64000,
|
|
/*.microseconds_per_frame */ 60000,
|
|
/*.samples_per_frame */ 480,
|
|
/*.bytes_per_frame */ 960,
|
|
/*.encoded_bytes_per_frame */ 480,
|
|
/*.number_of_channels */ 1,
|
|
/*.pref_frames_per_packet */ 1,
|
|
/*.max_frames_per_packet */ 1,
|
|
/*.init */ switch_g711a_init,
|
|
/*.encode */ switch_g711a_encode,
|
|
/*.decode */ switch_g711a_decode,
|
|
/*.destroy */ switch_g711a_destroy,
|
|
/*.next */ &g711a_8k_120ms_implementation
|
|
};
|
|
|
|
static switch_codec_implementation_t g711a_8k_30ms_implementation = {
|
|
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
|
/*.ianacode */ 8,
|
|
/*.iananame */ "PCMA",
|
|
/*.fmtp */ NULL,
|
|
/*.samples_per_second */ 8000,
|
|
/*.actual_samples_per_second */ 8000,
|
|
/*.bits_per_second */ 64000,
|
|
/*.microseconds_per_frame */ 30000,
|
|
/*.samples_per_frame */ 240,
|
|
/*.bytes_per_frame */ 480,
|
|
/*.encoded_bytes_per_frame */ 240,
|
|
/*.number_of_channels */ 1,
|
|
/*.pref_frames_per_packet */ 1,
|
|
/*.max_frames_per_packet */ 1,
|
|
/*.init */ switch_g711a_init,
|
|
/*.encode */ switch_g711a_encode,
|
|
/*.decode */ switch_g711a_decode,
|
|
/*.destroy */ switch_g711a_destroy,
|
|
/*.next */ &g711a_8k_60ms_implementation
|
|
};
|
|
|
|
static switch_codec_implementation_t g711a_8k_20ms_implementation = {
|
|
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
|
/*.ianacode */ 8,
|
|
/*.iananame */ "PCMA",
|
|
/*.fmtp */ NULL,
|
|
/*.samples_per_second */ 8000,
|
|
/*.actual_samples_per_second */ 8000,
|
|
/*.bits_per_second */ 64000,
|
|
/*.microseconds_per_frame */ 20000,
|
|
/*.samples_per_frame */ 160,
|
|
/*.bytes_per_frame */ 320,
|
|
/*.encoded_bytes_per_frame */ 160,
|
|
/*.number_of_channels */ 1,
|
|
/*.pref_frames_per_packet */ 1,
|
|
/*.max_frames_per_packet */ 1,
|
|
/*.init */ switch_g711a_init,
|
|
/*.encode */ switch_g711a_encode,
|
|
/*.decode */ switch_g711a_decode,
|
|
/*.destroy */ switch_g711a_destroy,
|
|
/*.next */ &g711a_8k_30ms_implementation
|
|
};
|
|
|
|
static switch_codec_implementation_t g711a_8k_10ms_implementation = {
|
|
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
|
/*.ianacode */ 8,
|
|
/*.iananame */ "PCMA",
|
|
/*.fmtp */ NULL,
|
|
/*.samples_per_second */ 8000,
|
|
/*.actual_samples_per_second */ 8000,
|
|
/*.bits_per_second */ 64000,
|
|
/*.microseconds_per_frame */ 10000,
|
|
/*.samples_per_frame */ 80,
|
|
/*.bytes_per_frame */ 160,
|
|
/*.encoded_bytes_per_frame */ 80,
|
|
/*.number_of_channels */ 1,
|
|
/*.pref_frames_per_packet */ 1,
|
|
/*.max_frames_per_packet */ 1,
|
|
/*.init */ switch_g711a_init,
|
|
/*.encode */ switch_g711a_encode,
|
|
/*.decode */ switch_g711a_decode,
|
|
/*.destroy */ switch_g711a_destroy,
|
|
/*.next */ &g711a_8k_20ms_implementation
|
|
};
|
|
|
|
SWITCH_MODULE_LOAD_FUNCTION(mod_g711_load)
|
|
{
|
|
switch_codec_interface_t *codec_interface;
|
|
/* 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, "g711 ulaw", &g711u_8k_10ms_implementation);
|
|
SWITCH_ADD_CODEC(codec_interface, "g711 alaw", &g711a_8k_10ms_implementation);
|
|
|
|
/* indicate that the module should continue to be loaded */
|
|
return SWITCH_STATUS_SUCCESS;
|
|
}
|
|
|
|
/* For Emacs:
|
|
* Local Variables:
|
|
* mode:c
|
|
* indent-tabs-mode:nil
|
|
* tab-width:4
|
|
* c-basic-offset:4
|
|
* End:
|
|
* For VIM:
|
|
* vim:set softtabstop=4 shiftwidth=4 tabstop=4 expandtab:
|
|
*/
|