add mod_b64

build/modules.conf.in

@@ -52,6 +52,7 @@ applications/mod_voicemail
 codecs/mod_amr
 #codecs/mod_amrwb
 codecs/mod_bv
+codecs/mod_b64
 #codecs/mod_celt
 #codecs/mod_codec2
 #codecs/mod_com_g729

conf/vanilla/autoload_configs/modules.conf.xml

@@ -88,6 +88,7 @@
     <load module="mod_speex"/>
     <load module="mod_h26x"/>
     <load module="mod_vp8"/>
+    <load module="mod_b64"/>
     <!--<load module="mod_siren"/>-->
     <!--<load module="mod_isac"/>-->
     <!--<load module="mod_celt"/>-->

src/mod/codecs/mod_b64/mod_b64.c

+/* 
+ * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ * Copyright (C) 2005-2012, 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_b64.c -- The B64 ultra-low delay audio codec (http://www.b64-codec.org/)
+ *
+ */
+
+#include "switch.h"
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_b64_load);
+SWITCH_MODULE_DEFINITION(mod_b64, mod_b64_load, NULL, NULL);
+
+#define HEADER "----Come to ClueCon Every August!    "
+#define HLEN strlen(HEADER)
+
+static switch_status_t switch_codec_b64_init(switch_codec_t *codec, switch_codec_flag_t flags, const switch_codec_settings_t *codec_settings)
+{
+	return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t switch_codec_b64_destroy(switch_codec_t *codec)
+{
+
+	codec->private_info = NULL;
+	return SWITCH_STATUS_SUCCESS;
+}
+
+static int rot(char *p, char min, char max, int i)
+{
+	int r = 0;
+	int c;
+	
+	if (*p >= min && *p <= max) {
+		if ((c = *p + i) <= max) {
+			*p = c;
+		} else {
+			*p = *p - i;
+		}
+		r++;
+	}
+
+	return r;
+}
+
+static void rot13_buffer(char *buf, size_t len)
+{
+	char *p = buf;
+	char *e = buf + len;
+
+	while(p < e) {
+		if (!rot(p, 'a', 'z', 13)) {
+			rot(p, 'A', 'Z', 13);
+		}
+		p++;
+	}
+}
+
+static switch_status_t switch_codec_b64_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)
+{
+	char *p = encoded_data;
+	strncpy(p, HEADER, *encoded_data_len - HLEN);
+	p += HLEN;
+	encoded_data = p;
+	*encoded_data_len -= HLEN;
+
+	switch_b64_encode((unsigned char *) decoded_data, decoded_data_len, (unsigned char *) encoded_data, *encoded_data_len);
+	*encoded_data_len = strlen(encoded_data);
+	rot13_buffer(encoded_data, *encoded_data_len);
+	*encoded_data_len += HLEN;
+
+	return SWITCH_STATUS_SUCCESS;
+
+}
+
+static switch_status_t switch_codec_b64_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)
+{
+
+	char *p = encoded_data;
+
+	if (strncmp(p, HEADER, HLEN)) {
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "HEADER CHECK ERROR!");
+		return SWITCH_STATUS_FALSE;
+	}
+
+	p += HLEN;
+	encoded_data = p;
+	encoded_data_len -= HLEN;
+	
+	rot13_buffer(encoded_data, encoded_data_len);
+	switch_b64_decode(encoded_data, decoded_data, *decoded_data_len);
+	*decoded_data_len = codec->implementation->decoded_bytes_per_packet;
+
+	return SWITCH_STATUS_SUCCESS;
+}
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_b64_load)
+{
+	switch_codec_interface_t *codec_interface;
+	int samples = 160;
+	int bytes = 320;
+	int mss = 20000;
+	int x = 0;
+	int rate = 8000;
+	int bits = 171200;
+
+	/* 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, "B64 (STANDARD)");
+
+	for (x = 0; x < 3; x++) {
+		switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO,	/* enumeration defining the type of the codec */
+											 116,	/* the IANA code number */
+											 "b64",/* the IANA code name */
+											 NULL,	/* default fmtp to send (can be overridden by the init function) */
+											 rate,	/* samples transferred per second */
+											 rate,	/* actual samples transferred per second */
+											 bits,	/* bits transferred per second */
+											 mss,	/* number of microseconds per frame */
+											 samples,	/* number of samples per frame */
+											 bytes,	/* number of bytes per frame decompressed */
+											 0,	/* number of bytes per frame compressed */
+											 1,	/* number of channels represented */
+											 1,	/* number of frames per network packet */
+											 switch_codec_b64_init,	/* function to initialize a codec handle using this implementation */
+											 switch_codec_b64_encode,	/* function to encode raw data into encoded data */
+											 switch_codec_b64_decode,	/* function to decode encoded data into raw data */
+											 switch_codec_b64_destroy);	/* deinitalize a codec handle using this implementation */
+		
+		bytes *= 2;
+		samples *= 2;
+		rate *= 2;
+		bits *= 2;
+		
+	}
+	
+	/* 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:
+ */
+