--- /dev/null
+/*
+ * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ * Copyright (C) 2005-2009, Anthony Minessale II <anthm@freeswitch.org>
+ *
+ * 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 <anthm@freeswitch.org>
+ * Portions created by the Initial Developer are Copyright (C)
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Brian K. West <brian@freeswitch.org>
+ *
+ * mod_bv.c -- BroadVoice16 and BroadVoice32 audio codecs (http://www.broadcom.com/support/broadvoice/)
+ *
+ */
+
+#include "switch.h"
+#include "broadvoice.h"
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_bv_load);
+SWITCH_MODULE_DEFINITION(mod_bv, mod_bv_load, NULL, NULL);
+
+#define FRAME_SIZE 40
+#define CODE_SIZE 5
+
+struct bv16_context {
+ bv16_decode_state_t *decoder_object;
+ bv16_encode_state_t *encoder_object;
+};
+
+static switch_status_t switch_bv16_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings)
+{
+ struct bv16_context *context = NULL;
+ int encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
+ int decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
+
+ if (!(encoding || decoding) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(*context))))) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ if (encoding) {
+ bv16_encode_init(context->encoder_object);
+ }
+
+ if (decoding) {
+ bv16_decode_init(context->decoder_object);
+ }
+
+ codec->private_info = context;
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t switch_bv16_destroy(switch_codec_t *codec)
+{
+ codec->private_info = NULL;
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t switch_bv16_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)
+{
+ struct bv16_context *context = codec->private_info;
+
+ if (!context) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ *encoded_data_len = bv16_encode(context->encoder_object, (uint8_t *) encoded_data, (int16_t *) decoded_data, decoded_data_len / 2);
+
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t switch_bv16_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)
+{
+ struct bv16_context *context = codec->private_info;
+
+ if (!context) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ if ((*flag & SFF_PLC)) {
+ *decoded_data_len = (2 * bv16_fillin(context->decoder_object, (int16_t *) decoded_data, encoded_data_len));
+ } else {
+ *decoded_data_len = (2 * bv16_decode(context->decoder_object, (int16_t *) decoded_data, (uint8_t *) encoded_data, encoded_data_len));
+ }
+
+ return SWITCH_STATUS_SUCCESS;
+}
+
+struct bv32_context {
+ bv32_decode_state_t *decoder_object;
+ bv32_encode_state_t *encoder_object;
+};
+
+static switch_status_t switch_bv32_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings)
+{
+ struct bv32_context *context = NULL;
+ int encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
+ int decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
+
+ if (!(encoding || decoding) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(*context))))) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ if (encoding) {
+ bv32_encode_init(context->encoder_object);
+ }
+
+ if (decoding) {
+ bv32_decode_init(context->decoder_object);
+ }
+
+ codec->private_info = context;
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t switch_bv32_destroy(switch_codec_t *codec)
+{
+ codec->private_info = NULL;
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t switch_bv32_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)
+{
+ struct bv32_context *context = codec->private_info;
+
+ if (!context) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ *encoded_data_len = bv32_encode(context->encoder_object, (uint8_t *) encoded_data, (int16_t *) decoded_data, decoded_data_len / 2);
+
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t switch_bv32_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)
+{
+ struct bv32_context *context = codec->private_info;
+
+ if (!context) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ if ((*flag & SFF_PLC)) {
+ *decoded_data_len = (2 * bv32_fillin(context->decoder_object, (int16_t *) decoded_data, encoded_data_len));
+ } else {
+ *decoded_data_len = (2 * bv32_decode(context->decoder_object, (int16_t *) decoded_data, (uint8_t *) encoded_data, encoded_data_len));
+ }
+ return SWITCH_STATUS_SUCCESS;
+}
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_bv_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, "BroadVoice16 (BV16)");
+
+ switch_core_codec_add_implementation(pool,
+ codec_interface,
+ SWITCH_CODEC_TYPE_AUDIO, /* enumeration defining the type of the codec */
+ 106, /* the IANA code number */
+ "BV16", /* the IANA code name */
+ NULL, /* default fmtp to send (can be overridden by the init function) */
+ 8000, /* samples transferred per second */
+ 8000, /* actual samples transferred per second */
+ 16000, /* bits transferred per second */
+ 20000, /* number of microseconds per frame */
+ 160, /* number of samples per frame */
+ 320, /* number of bytes per frame decompressed */
+ 40, /* number of bytes per frame compressed */
+ 1, /* number of channels represented */
+ 1, /* number of frames per network packet */
+ switch_bv16_init, /* function to initialize a codec handle using this implementation */
+ switch_bv16_encode, /* function to encode raw data into encoded data */
+ switch_bv16_decode, /* function to decode encoded data into raw data */
+ switch_bv16_destroy); /* deinitalize a codec handle using this implementation */
+
+ SWITCH_ADD_CODEC(codec_interface, "BroadVoice32 (BV32)");
+
+ switch_core_codec_add_implementation(pool,
+ codec_interface,
+ SWITCH_CODEC_TYPE_AUDIO, /* enumeration defining the type of the codec */
+ 127, /* the IANA code number */
+ "BV32", /* the IANA code name */
+ NULL, /* default fmtp to send (can be overridden by the init function) */
+ 16000, /* samples transferred per second */
+ 16000, /* actual samples transferred per second */
+ 32000, /* bits transferred per second */
+ 20000, /* number of microseconds per frame */
+ 320, /* number of samples per frame */
+ 640, /* number of bytes per frame decompressed */
+ 80, /* number of bytes per frame compressed */
+ 1, /* number of channels represented */
+ 1, /* number of frames per network packet */
+ switch_bv32_init, /* function to initialize a codec handle using this implementation */
+ switch_bv32_encode, /* function to encode raw data into encoded data */
+ switch_bv32_decode, /* function to decode encoded data into raw data */
+ switch_bv32_destroy); /* deinitalize a codec handle using this implementation */
+
+
+ /* 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:
+ */
projects / thirdparty / freeswitch.git / commitdiff
