346 lines
9.9 KiB
C
346 lines
9.9 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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* Michael Jerris <mike@jerris.com>
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*
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* mod_ilbc.c -- ilbc Codec Module
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*
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*/
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#include "switch.h"
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#include "iLBC_encode.h"
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#include "iLBC_decode.h"
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#include "iLBC_define.h"
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static const char modname[] = "mod_ilbc";
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struct ilbc_context {
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iLBC_Enc_Inst_t encoder;
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iLBC_Dec_Inst_t decoder;
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uint8_t ms;
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uint16_t bytes;
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uint16_t dbytes;
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};
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static switch_status_t switch_ilbc_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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struct ilbc_context *context;
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int encoding, decoding;
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uint8_t ms = (uint8_t)(codec->implementation->microseconds_per_frame / 1000);
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if (ms != 20 && ms != 30) {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "invalid speed! (I should never happen)\n");
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return SWITCH_STATUS_FALSE;
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}
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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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context = switch_core_alloc(codec->memory_pool, sizeof(*context));
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context->ms = ms;
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if (context->ms == 20) {
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context->bytes = NO_OF_BYTES_20MS;
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context->dbytes = 320;
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} else {
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context->bytes = NO_OF_BYTES_30MS;
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context->dbytes = 480;
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}
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if (encoding) {
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initEncode(&context->encoder, context->ms);
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}
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if (decoding) {
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initDecode(&context->decoder, context->ms, 1);
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}
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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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static switch_status_t switch_ilbc_destroy(switch_codec_t *codec)
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{
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codec->private_info = NULL;
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return SWITCH_STATUS_SUCCESS;
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}
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static switch_status_t switch_ilbc_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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struct ilbc_context *context = codec->private_info;
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if (!context) {
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return SWITCH_STATUS_FALSE;
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}
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if (decoded_data_len % context->dbytes == 0) {
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unsigned int new_len = 0;
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unsigned char *edp = encoded_data;
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short *ddp = decoded_data;
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int x;
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uint16_t y;
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int loops = (int) decoded_data_len / context->dbytes;
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float buf[240];
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for (x = 0; x < loops && new_len < *encoded_data_len; x++) {
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for(y = 0; y < context->dbytes / sizeof(short) ; y++) {
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buf[y] = ddp[y];
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}
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iLBC_encode(edp, buf, &context->encoder);
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edp += context->bytes;
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ddp += context->dbytes;
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new_len += context->bytes;
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}
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if (new_len <= *encoded_data_len) {
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*encoded_data_len = new_len;
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} else {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "buffer overflow!!! %u >= %u\n", new_len, *encoded_data_len);
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return SWITCH_STATUS_FALSE;
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}
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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_ilbc_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 ilbc_context *context = codec->private_info;
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if (!context) {
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return SWITCH_STATUS_FALSE;
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}
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if (encoded_data_len % context->bytes == 0) {
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int loops = (int) encoded_data_len / context->bytes;
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unsigned char *edp = encoded_data;
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short *ddp = decoded_data;
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int x;
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uint16_t y;
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unsigned int new_len = 0;
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float buf[240];
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for (x = 0; x < loops && new_len < *decoded_data_len; x++) {
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iLBC_decode(buf, edp, &context->decoder, 1);
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for(y = 0; y < context->dbytes / sizeof(short) ; y++) {
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ddp[y] = (short)buf[y];
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}
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ddp += context->dbytes / sizeof(short);
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edp += context->bytes;
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new_len += context->dbytes;
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}
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if (new_len <= *decoded_data_len) {
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*decoded_data_len = new_len;
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} else {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "buffer overflow!!!\n");
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return SWITCH_STATUS_FALSE;
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}
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} else {
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switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "yo this frame is an odd size [%d]\n", encoded_data_len);
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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 const switch_codec_implementation_t ilbc_8k_30ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 97,
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/*.iananame */ "iLBC",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ NO_OF_BYTES_30MS*8*8000/BLOCKL_30MS,
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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 */ NO_OF_BYTES_30MS,
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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_ilbc_init,
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/*.encode */ switch_ilbc_encode,
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/*.decode */ switch_ilbc_decode,
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/*.destroy */ switch_ilbc_destroy
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};
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static const switch_codec_implementation_t ilbc_8k_20ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 97,
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/*.iananame */ "iLBC",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ NO_OF_BYTES_20MS*8*8000/BLOCKL_20MS,
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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 */ NO_OF_BYTES_20MS,
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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_ilbc_init,
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/*.encode */ switch_ilbc_encode,
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/*.decode */ switch_ilbc_decode,
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/*.destroy */ switch_ilbc_destroy,
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/*.next */ &ilbc_8k_30ms_implementation
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};
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static const switch_codec_implementation_t ilbc_102_8k_30ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 102,
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/*.iananame */ "iLBC",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ NO_OF_BYTES_30MS*8*8000/BLOCKL_30MS,
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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 */ NO_OF_BYTES_30MS,
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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_ilbc_init,
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/*.encode */ switch_ilbc_encode,
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/*.decode */ switch_ilbc_decode,
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/*.destroy */ switch_ilbc_destroy
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};
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static const switch_codec_implementation_t ilbc_102_8k_20ms_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 102,
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/*.iananame */ "iLBC102",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ NO_OF_BYTES_20MS*8*8000/BLOCKL_20MS,
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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 */ NO_OF_BYTES_20MS,
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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_ilbc_init,
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/*.encode */ switch_ilbc_encode,
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/*.decode */ switch_ilbc_decode,
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/*.destroy */ switch_ilbc_destroy,
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/*.next */ &ilbc_102_8k_30ms_implementation
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};
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static const switch_codec_implementation_t ilbc_8k_20ms_nonext_implementation = {
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/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
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/*.ianacode */ 97,
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/*.iananame */ "iLBC20ms",
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/*.fmtp */ NULL,
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/*.samples_per_second */ 8000,
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/*.bits_per_second */ NO_OF_BYTES_20MS*8*8000/BLOCKL_20MS,
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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 */ NO_OF_BYTES_20MS,
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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_ilbc_init,
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/*.encode */ switch_ilbc_encode,
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/*.decode */ switch_ilbc_decode,
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/*.destroy */ switch_ilbc_destroy
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};
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static const switch_codec_interface_t ilbc_20ms_codec_interface = {
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/*.interface_name */ "ilbc",
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/*.implementations */ &ilbc_8k_20ms_nonext_implementation
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};
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static const switch_codec_interface_t ilbc_102_codec_interface = {
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/*.interface_name */ "ilbc",
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/*.implementations */ &ilbc_102_8k_20ms_implementation,
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/*.next*/ &ilbc_20ms_codec_interface
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};
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static const switch_codec_interface_t ilbc_codec_interface = {
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/*.interface_name */ "ilbc",
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/*.implementations */ &ilbc_8k_20ms_implementation,
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/*.next*/ &ilbc_102_codec_interface
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};
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static switch_loadable_module_interface_t ilbc_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 */ &ilbc_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 = &ilbc_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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