--- /dev/null
+/*
+ * 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>
+ * Brian K. West <brian.west@mac.com>
+ *
+ * The amrwb codec itself is not distributed with this module.
+ *
+ * mod_amrwb.c -- GSM-AMRWB Codec Module
+ *
+ */
+
+#include "switch.h"
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_amrwb_load);
+SWITCH_MODULE_DEFINITION(mod_amrwb, mod_amrwb_load, NULL, NULL);
+
+#ifndef AMRWB_PASSTHROUGH
+#include "dec_if.h"
+#include "enc_if.h"
+
+typedef enum {
+ AMRWB_OPT_OCTET_ALIGN = (1 << 0),
+ AMRWB_OPT_CRC = (1 << 1),
+ AMRWB_OPT_MODE_CHANGE_NEIGHBOR = (1 << 2),
+ AMRWB_OPT_ROBUST_SORTING = (1 << 3),
+ AMRWB_OPT_INTERLEAVING = (1 << 4)
+} amrwb_flag_t;
+
+typedef enum {
+ AMRWB_BITRATE_7K = 0,
+ AMRWB_BITRATE_8K,
+ AMRWB_BITRATE_12K,
+ AMRWB_BITRATE_14K,
+ AMRWB_BITRATE_16K,
+ AMRWB_BITRATE_18K,
+ AMRWB_BITRATE_20K,
+ AMRWB_BITRATE_23K,
+ AMRWB_BITRATE_24K
+} amrwb_bitrate_t;
+
+struct amrwb_context {
+ void *encoder_state;
+ void *decoder_state;
+ switch_byte_t enc_modes;
+ switch_byte_t enc_mode;
+ uint32_t change_period;
+ switch_byte_t max_ptime;
+ switch_byte_t ptime;
+ switch_byte_t channels;
+ switch_byte_t flags;
+};
+
+#define AMRWB_DEFAULT_BITRATE AMRWB_BITRATE_24K
+
+static struct {
+ switch_byte_t default_bitrate;
+} globals;
+
+#endif
+
+static switch_status_t switch_amrwb_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings)
+{
+#ifdef AMRWB_PASSTHROUGH
+ codec->flags |= SWITCH_CODEC_FLAG_PASSTHROUGH;
+ if (codec->fmtp_in) {
+ codec->fmtp_out = switch_core_strdup(codec->memory_pool, codec->fmtp_in);
+ }
+ return SWITCH_STATUS_SUCCESS;
+#else
+ struct amrwb_context *context = NULL;
+ int encoding, decoding;
+ int x, i, argc;
+ char *argv[10];
+ char fmtptmp[128];
+
+ encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
+ decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
+
+ if (!(encoding || decoding) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(struct amrwb_context))))) {
+ return SWITCH_STATUS_FALSE;
+ } else {
+
+ if (codec->fmtp_in) {
+ argc = switch_separate_string(codec->fmtp_in, ';', argv, (sizeof(argv) / sizeof(argv[0])));
+ for (x = 0; x < argc; x++) {
+ char *data = argv[x];
+ char *arg;
+ while (*data && *data == ' ') {
+ data++;
+ }
+ if ((arg = strchr(data, '='))) {
+ *arg++ = '\0';
+ if (!strcasecmp(data, "octet-align")) {
+ if (atoi(arg)) {
+ switch_set_flag(context, AMRWB_OPT_OCTET_ALIGN);
+ }
+ } else if (!strcasecmp(data, "mode-change-neighbor")) {
+ if (atoi(arg)) {
+ switch_set_flag(context, AMRWB_OPT_MODE_CHANGE_NEIGHBOR);
+ }
+ } else if (!strcasecmp(data, "crc")) {
+ if (atoi(arg)) {
+ switch_set_flag(context, AMRWB_OPT_CRC);
+ }
+ } else if (!strcasecmp(data, "robust-sorting")) {
+ if (atoi(arg)) {
+ switch_set_flag(context, AMRWB_OPT_ROBUST_SORTING);
+ }
+ } else if (!strcasecmp(data, "interveaving")) {
+ if (atoi(arg)) {
+ switch_set_flag(context, AMRWB_OPT_INTERLEAVING);
+ }
+ } else if (!strcasecmp(data, "mode-change-period")) {
+ context->change_period = atoi(arg);
+ } else if (!strcasecmp(data, "ptime")) {
+ context->ptime = (switch_byte_t) atoi(arg);
+ } else if (!strcasecmp(data, "channels")) {
+ context->channels = (switch_byte_t) atoi(arg);
+ } else if (!strcasecmp(data, "maxptime")) {
+ context->max_ptime = (switch_byte_t) atoi(arg);
+ } else if (!strcasecmp(data, "mode-set")) {
+ int y, m_argc;
+ char *m_argv[8];
+ m_argc = switch_separate_string(arg, ',', m_argv, (sizeof(m_argv) / sizeof(m_argv[0])));
+ for (y = 0; y < m_argc; y++) {
+ context->enc_modes |= (1 << atoi(m_argv[y]));
+ }
+ }
+ }
+ }
+ }
+
+ if (context->enc_modes) {
+ for (i = 8; i > -1; i++) {
+ if (context->enc_modes & (1 << i)) {
+ context->enc_mode = (switch_byte_t) i;
+ break;
+ }
+ }
+ }
+
+ if (!context->enc_mode) {
+ context->enc_mode = globals.default_bitrate;
+ }
+
+ switch_snprintf(fmtptmp, sizeof(fmtptmp), "octet-align=%d; mode-set=%d", switch_test_flag(context, AMRWB_OPT_OCTET_ALIGN) ? 1 : 0, context->enc_mode);
+ codec->fmtp_out = switch_core_strdup(codec->memory_pool, fmtptmp);
+
+ context->enc_mode = AMRWB_DEFAULT_BITRATE;
+ context->encoder_state = NULL;
+ context->decoder_state = NULL;
+
+ if (encoding) {
+ context->encoder_state = E_IF_init();
+ }
+
+ if (decoding) {
+ context->decoder_state = D_IF_init();
+ }
+
+ codec->private_info = context;
+
+ return SWITCH_STATUS_SUCCESS;
+ }
+#endif
+}
+
+static switch_status_t switch_amrwb_destroy(switch_codec_t *codec)
+{
+#ifndef AMRWB_PASSTHROUGH
+ struct amrwb_context *context = codec->private_info;
+
+ if (context->encoder_state) {
+ E_IF_exit(context->encoder_state);
+ }
+ if (context->decoder_state) {
+ D_IF_exit(context->decoder_state);
+ }
+ codec->private_info = NULL;
+#endif
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t switch_amrwb_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)
+{
+#ifdef AMRWB_PASSTHROUGH
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "This codec is only usable in passthrough mode!\n");
+ return SWITCH_STATUS_FALSE;
+#else
+ struct amrwb_context *context = codec->private_info;
+
+ if (!context) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ *encoded_data_len = E_IF_encode(context->encoder_state, context->enc_mode, (int16_t *) decoded_data, (switch_byte_t *) encoded_data, 0);
+
+ return SWITCH_STATUS_SUCCESS;
+#endif
+}
+
+static switch_status_t switch_amrwb_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)
+{
+#ifdef AMRWB_PASSTHROUGH
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "This codec is only usable in passthrough mode!\n");
+ return SWITCH_STATUS_FALSE;
+#else
+ struct amrwb_context *context = codec->private_info;
+
+ if (!context) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ D_IF_decode(context->decoder_state, (unsigned char *) encoded_data, (int16_t *) decoded_data, 0);
+ *decoded_data_len = codec->implementation->decoded_bytes_per_packet;
+
+ return SWITCH_STATUS_SUCCESS;
+#endif
+}
+
+/* Registration */
+SWITCH_MODULE_LOAD_FUNCTION(mod_amrwb_load)
+{
+ switch_codec_interface_t *codec_interface;
+#ifndef AMRWB_PASSTHROUGH
+ char *cf = "amrwb.conf";
+ switch_xml_t cfg, xml, settings, param;
+
+ memset(&globals, 0, sizeof(globals));
+ globals.default_bitrate = AMRWB_DEFAULT_BITRATE;
+
+ if ((xml = switch_xml_open_cfg(cf, &cfg, NULL))) {
+ if ((settings = switch_xml_child(cfg, "settings"))) {
+ for (param = switch_xml_child(settings, "param"); param; param = param->next) {
+ char *var = (char *) switch_xml_attr_soft(param, "name");
+ char *val = (char *) switch_xml_attr_soft(param, "value");
+ if (!strcasecmp(var, "default-bitrate")) {
+ globals.default_bitrate = (switch_byte_t) atoi(val);
+ }
+ }
+ }
+ }
+#endif
+
+ /* 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, "AMR-WB");
+ switch_core_codec_add_implementation(pool, codec_interface,
+ SWITCH_CODEC_TYPE_AUDIO, 100, "AMR-WB", "octet-align=0", 16000, 16000, 23850,
+ 20000, 320, 640, 0, 1, 1,
+ switch_amrwb_init, switch_amrwb_encode, switch_amrwb_decode, switch_amrwb_destroy);
+ /* 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 expandtab:
+ */
projects / thirdparty / freeswitch.git / commitdiff
