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ad7cc96015
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@16321 d0543943-73ff-0310-b7d9-9358b9ac24b2
238 lines
6.7 KiB
C
238 lines
6.7 KiB
C
/*
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* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
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* Copyright (C) 2005-2009, Anthony Minessale II <anthm@freeswitch.org>
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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 <anthm@freeswitch.org>
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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 <anthm@freeswitch.org>
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* Michael Jerris <mike@jerris.com>
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*
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* The g729 codec itself is not distributed with this module.
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*
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* mod_g729.c -- G.729 Codec Module
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*
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*/
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#include "switch.h"
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SWITCH_MODULE_LOAD_FUNCTION(mod_g729_load);
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SWITCH_MODULE_DEFINITION(mod_g729, mod_g729_load, NULL, NULL);
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#ifndef G729_PASSTHROUGH
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#include "g729.h"
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struct g729_context {
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struct dec_state decoder_object;
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struct cod_state encoder_object;
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};
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#endif
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static switch_status_t switch_g729_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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#ifdef G729_PASSTHROUGH
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codec->flags |= SWITCH_CODEC_FLAG_PASSTHROUGH;
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if (codec->fmtp_in) {
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codec->fmtp_out = switch_core_strdup(codec->memory_pool, codec->fmtp_in);
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}
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return SWITCH_STATUS_SUCCESS;
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#else
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struct g729_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 g729_context))))) {
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return SWITCH_STATUS_FALSE;
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} else {
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if (codec->fmtp_in) {
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codec->fmtp_out = switch_core_strdup(codec->memory_pool, codec->fmtp_in);
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}
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if (encoding) {
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g729_init_coder(&context->encoder_object, 0);
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}
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if (decoding) {
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g729_init_decoder(&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_g729_destroy(switch_codec_t *codec)
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{
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#ifndef G729_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_g729_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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#ifdef G729_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 g729_context *context = codec->private_info;
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int cbret = 0;
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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 % 160 == 0) {
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uint32_t new_len = 0;
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INT16 *ddp = decoded_data;
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char *edp = encoded_data;
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int x;
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int loops = (int) decoded_data_len / 160;
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for (x = 0; x < loops && new_len < *encoded_data_len; x++) {
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g729_coder(&context->encoder_object, ddp, edp, &cbret);
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edp += 10;
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ddp += 80;
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new_len += 10;
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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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#endif
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}
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static switch_status_t switch_g729_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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#ifdef G729_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 g729_context *context = codec->private_info;
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int divisor = 10;
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int plen = 10;
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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 % 2 == 0) {
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if (encoded_data_len == 2 || encoded_data_len % 12 == 0) {
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return SWITCH_STATUS_BREAK;
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//divisor = 12;
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//plen = 10;
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} else if (encoded_data_len % 10 != 0) {
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//*decoded_data_len = (encoded_data_len / 2) * 160;
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//memset(decoded_data, 255, *decoded_data_len);
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return SWITCH_STATUS_BREAK;
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} else {
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divisor = plen = 10;
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}
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if (encoded_data_len % divisor == 0) {
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uint8_t *test;
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int loops = (int) encoded_data_len / divisor;
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char *edp = encoded_data;
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short *ddp = decoded_data;
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int x;
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uint32_t new_len = 0;
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test = (uint8_t *) encoded_data;
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if (*test == 0 && *(test + 1) == 0) {
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*decoded_data_len = (encoded_data_len / divisor) * 160;
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memset(decoded_data, 0, *decoded_data_len);
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return SWITCH_STATUS_SUCCESS;
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}
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for (x = 0; x < loops && new_len < *decoded_data_len; x++) {
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g729_decoder(&context->decoder_object, ddp, edp, plen);
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ddp += 80;
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edp += divisor;
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new_len += 160;
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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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}
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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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return SWITCH_STATUS_FALSE;
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}
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return SWITCH_STATUS_SUCCESS;
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#endif
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}
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SWITCH_MODULE_LOAD_FUNCTION(mod_g729_load)
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{
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switch_codec_interface_t *codec_interface;
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int mpf = 10000, spf = 80, bpf = 160, ebpf = 10, count;
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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, "G.729");
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for (count = 12; count > 0; count--) {
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switch_core_codec_add_implementation(pool, codec_interface,
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SWITCH_CODEC_TYPE_AUDIO, 18, "G729", NULL, 8000, 8000, 8000,
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mpf * count, spf * count, bpf * count, ebpf * count, 1, count * 10,
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switch_g729_init, switch_g729_encode, switch_g729_decode, switch_g729_destroy);
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}
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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:
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*/
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