417 lines
12 KiB
C
417 lines
12 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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*
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*
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* mod_g711codec.c -- G711 Ulaw/Alaw Codec Module
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*
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*/
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#include <switch.h>
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#include <g7xx/g711.h>
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SWITCH_MODULE_LOAD_FUNCTION(mod_g711_load);
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SWITCH_MODULE_DEFINITION(mod_g711, mod_g711_load, NULL, NULL);
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static switch_status_t switch_g711u_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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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)) {
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return SWITCH_STATUS_FALSE;
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} else {
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return SWITCH_STATUS_SUCCESS;
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}
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}
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static switch_status_t switch_g711u_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, void *encoded_data, uint32_t * encoded_data_len, uint32_t * encoded_rate,
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unsigned int *flag)
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{
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short *dbuf;
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unsigned char *ebuf;
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uint32_t i;
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dbuf = decoded_data;
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ebuf = encoded_data;
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for (i = 0; i < decoded_data_len / sizeof(short); i++) {
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ebuf[i] = linear_to_ulaw(dbuf[i]);
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}
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*encoded_data_len = i;
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_g711u_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, void *decoded_data, uint32_t * decoded_data_len, uint32_t * decoded_rate,
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unsigned int *flag)
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{
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short *dbuf;
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unsigned char *ebuf;
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uint32_t i;
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dbuf = decoded_data;
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ebuf = encoded_data;
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if (*flag & SWITCH_CODEC_FLAG_SILENCE) {
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memset(dbuf, 0, codec->implementation->bytes_per_frame);
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*decoded_data_len = codec->implementation->bytes_per_frame;
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} else {
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for (i = 0; i < encoded_data_len; i++) {
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dbuf[i] = ulaw_to_linear(ebuf[i]);
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}
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*decoded_data_len = i * 2;
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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_g711u_destroy(switch_codec_t *codec)
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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_g711a_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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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)) {
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return SWITCH_STATUS_FALSE;
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} else {
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return SWITCH_STATUS_SUCCESS;
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}
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}
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static switch_status_t switch_g711a_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, void *encoded_data, uint32_t * encoded_data_len, uint32_t * encoded_rate,
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unsigned int *flag)
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{
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short *dbuf;
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unsigned char *ebuf;
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uint32_t i;
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dbuf = decoded_data;
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ebuf = encoded_data;
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for (i = 0; i < decoded_data_len / sizeof(short); i++) {
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ebuf[i] = linear_to_alaw(dbuf[i]);
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}
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*encoded_data_len = i;
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_g711a_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, void *decoded_data, uint32_t * decoded_data_len, uint32_t * decoded_rate,
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unsigned int *flag)
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{
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short *dbuf;
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unsigned char *ebuf;
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uint32_t i;
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dbuf = decoded_data;
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ebuf = encoded_data;
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if (*flag & SWITCH_CODEC_FLAG_SILENCE) {
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memset(dbuf, 0, codec->implementation->bytes_per_frame);
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*decoded_data_len = codec->implementation->bytes_per_frame;
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} else {
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for (i = 0; i < encoded_data_len; i++) {
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dbuf[i] = alaw_to_linear(ebuf[i]);
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}
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*decoded_data_len = i * 2;
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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_g711a_destroy(switch_codec_t *codec)
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{
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return SWITCH_STATUS_SUCCESS;
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}
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/* Registration */
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static switch_codec_implementation_t g711u_8k_120ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 0,
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/*.iananame */ "PCMU",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 64000,
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/*.microseconds_per_frame */ 120000,
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/*.samples_per_frame */ 960,
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/*.bytes_per_frame */ 1920,
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/*.encoded_bytes_per_frame */ 960,
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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 */ 1,
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/*.init */ switch_g711u_init,
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/*.encode */ switch_g711u_encode,
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/*.decode */ switch_g711u_decode,
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/*.destroy */ switch_g711u_destroy
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};
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static switch_codec_implementation_t g711u_8k_60ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 0,
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/*.iananame */ "PCMU",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 19200,
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/*.microseconds_per_frame */ 60000,
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/*.samples_per_frame */ 480,
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/*.bytes_per_frame */ 960,
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/*.encoded_bytes_per_frame */ 480,
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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 */ 1,
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/*.init */ switch_g711u_init,
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/*.encode */ switch_g711u_encode,
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/*.decode */ switch_g711u_decode,
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/*.destroy */ switch_g711u_destroy,
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/*.next */ &g711u_8k_120ms_implementation
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};
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static switch_codec_implementation_t g711u_8k_30ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 0,
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/*.iananame */ "PCMU",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 96000,
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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 */ 240,
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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 */ 1,
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/*.init */ switch_g711u_init,
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/*.encode */ switch_g711u_encode,
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/*.decode */ switch_g711u_decode,
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/*.destroy */ switch_g711u_destroy,
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/*.next */ &g711u_8k_60ms_implementation
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};
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static switch_codec_implementation_t g711u_8k_20ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 0,
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/*.iananame */ "PCMU",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 64000,
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/*.microseconds_per_frame */ 20000,
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/*.samples_per_frame */ 160,
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/*.bytes_per_frame */ 320,
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/*.encoded_bytes_per_frame */ 160,
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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 */ 1,
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/*.init */ switch_g711u_init,
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/*.encode */ switch_g711u_encode,
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/*.decode */ switch_g711u_decode,
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/*.destroy */ switch_g711u_destroy,
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/*.next */ &g711u_8k_30ms_implementation
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};
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static switch_codec_implementation_t g711u_8k_10ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 0,
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/*.iananame */ "PCMU",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 64000,
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/*.microseconds_per_frame */ 10000,
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/*.samples_per_frame */ 80,
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/*.bytes_per_frame */ 160,
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/*.encoded_bytes_per_frame */ 80,
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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 */ 1,
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/*.init */ switch_g711u_init,
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/*.encode */ switch_g711u_encode,
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/*.decode */ switch_g711u_decode,
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/*.destroy */ switch_g711u_destroy,
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/*.next */ &g711u_8k_20ms_implementation
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};
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static switch_codec_implementation_t g711a_8k_120ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 8,
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/*.iananame */ "PCMA",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 64000,
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/*.microseconds_per_frame */ 120000,
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/*.samples_per_frame */ 960,
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/*.bytes_per_frame */ 1920,
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/*.encoded_bytes_per_frame */ 960,
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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 */ 1,
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/*.init */ switch_g711a_init,
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/*.encode */ switch_g711a_encode,
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/*.decode */ switch_g711a_decode,
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/*.destroy */ switch_g711a_destroy
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};
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static switch_codec_implementation_t g711a_8k_60ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 8,
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/*.iananame */ "PCMA",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 19200,
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/*.microseconds_per_frame */ 60000,
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/*.samples_per_frame */ 480,
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/*.bytes_per_frame */ 960,
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/*.encoded_bytes_per_frame */ 480,
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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 */ 1,
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/*.init */ switch_g711a_init,
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/*.encode */ switch_g711a_encode,
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/*.decode */ switch_g711a_decode,
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/*.destroy */ switch_g711a_destroy,
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/*.next */ &g711a_8k_120ms_implementation
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};
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static switch_codec_implementation_t g711a_8k_30ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 8,
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/*.iananame */ "PCMA",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 96000,
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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 */ 240,
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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 */ 1,
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/*.init */ switch_g711a_init,
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/*.encode */ switch_g711a_encode,
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/*.decode */ switch_g711a_decode,
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/*.destroy */ switch_g711a_destroy,
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/*.next */ &g711a_8k_60ms_implementation
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};
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static switch_codec_implementation_t g711a_8k_20ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 8,
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/*.iananame */ "PCMA",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 64000,
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/*.microseconds_per_frame */ 20000,
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/*.samples_per_frame */ 160,
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/*.bytes_per_frame */ 320,
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/*.encoded_bytes_per_frame */ 160,
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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 */ 1,
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/*.init */ switch_g711a_init,
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/*.encode */ switch_g711a_encode,
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/*.decode */ switch_g711a_decode,
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/*.destroy */ switch_g711a_destroy,
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/*.next */ &g711a_8k_30ms_implementation
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};
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static switch_codec_implementation_t g711a_8k_10ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 8,
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/*.iananame */ "PCMA",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ 64000,
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/*.microseconds_per_frame */ 10000,
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/*.samples_per_frame */ 80,
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/*.bytes_per_frame */ 160,
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/*.encoded_bytes_per_frame */ 80,
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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 */ 1,
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/*.init */ switch_g711a_init,
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/*.encode */ switch_g711a_encode,
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/*.decode */ switch_g711a_decode,
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/*.destroy */ switch_g711a_destroy,
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/*.next */ &g711a_8k_20ms_implementation
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};
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SWITCH_MODULE_LOAD_FUNCTION(mod_g711_load)
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{
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switch_codec_interface_t *codec_interface;
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/* connect my internal structure to the blank pointer passed to me */
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*module_interface = switch_loadable_module_create_module_interface(pool, modname);
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SWITCH_ADD_CODEC(codec_interface, "g711 ulaw", &g711u_8k_10ms_implementation);
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SWITCH_ADD_CODEC(codec_interface, "g711 alaw", &g711a_8k_10ms_implementation);
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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 expandtab:
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*/
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