--- /dev/null
+/*
+ * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
+ * Copyright (C) 2005-2010, 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):
+ *
+ * Anthony Minessale II <anthm@freeswitch.org>
+ * Brian K. West <brian@freeswitch.org>
+ *
+ * The silk codec itself is not distributed with this module.
+ *
+ * mod_silk.c -- Skype(tm) SILK Codec Module
+ *
+ */
+
+#include "switch.h"
+#include "SKP_Silk_SDK_API.h"
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_silk_load);
+SWITCH_MODULE_DEFINITION(mod_silk, mod_silk_load, NULL, NULL);
+
+#define MAX_BYTES_PER_FRAME 250
+#define MAX_INPUT_FRAMES 5
+#define MAX_LBRR_DELAY 2
+#define MAX_FRAME_LENGTH 480
+
+struct silk_context {
+ SKP_SILK_SDK_EncControlStruct encoder_object;
+ SKP_SILK_SDK_DecControlStruct decoder_object;
+ void *enc_state;
+ void *dec_state;
+};
+
+static switch_status_t switch_silk_init(switch_codec_t *codec, switch_codec_flag_t freeswitch_flags, const switch_codec_settings_t *codec_settings)
+{
+ struct silk_context *context = NULL;
+ SKP_int useinbandfec = 0, usedtx = 0, maxaveragebitrate = 0;
+ SKP_int32 encSizeBytes;
+ SKP_int32 decSizeBytes;
+ int encoding = (freeswitch_flags & SWITCH_CODEC_FLAG_ENCODE);
+ int decoding = (freeswitch_flags & SWITCH_CODEC_FLAG_DECODE);
+
+ if (!(encoding || decoding)
+ || (!(context = switch_core_alloc(codec->memory_pool, sizeof(*context))))) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ if (codec->fmtp_in) {
+ int x, argc;
+ char *argv[10];
+ 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;
+ switch_assert(data);
+ while (*data == ' ') {
+ data++;
+ }
+ if ((arg = strchr(data, '='))) {
+ *arg++ = '\0';
+ if (!strcasecmp(data, "useinbandfec")) {
+ if (switch_true(arg)) {
+ useinbandfec = 1;
+ }
+ }
+ if (!strcasecmp(data, "usedtx")) {
+ if (switch_true(arg)) {
+ usedtx = 1;
+ }
+ }
+ if (!strcasecmp(data, "maxaveragebitrate")) {
+ maxaveragebitrate = atoi(arg);
+ switch (codec->implementation->actual_samples_per_second) {
+ case 8000:
+ {
+ if (maxaveragebitrate < 6000 || maxaveragebitrate > 20000) {
+ maxaveragebitrate = 20000;
+ }
+ break;
+ }
+ case 12000:
+ {
+ if (maxaveragebitrate < 7000 || maxaveragebitrate > 25000) {
+ maxaveragebitrate = 25000;
+ }
+ break;
+ }
+ case 16000:
+ {
+ if (maxaveragebitrate < 8000 || maxaveragebitrate > 30000) {
+ maxaveragebitrate = 30000;
+ }
+ break;
+ }
+ case 24000:
+ {
+ if (maxaveragebitrate < 12000 || maxaveragebitrate > 40000) {
+ maxaveragebitrate = 40000;
+ }
+ break;
+ }
+
+ default:
+ /* this should never happen but 20000 is common among all rates */
+ maxaveragebitrate = 20000;
+ break;
+ }
+
+ }
+ }
+ }
+ }
+
+ codec->fmtp_out =
+ switch_core_sprintf(codec->memory_pool,
+ "useinbandfec=%s; usedtx=%s; maxaveragebitrate=%d",
+ useinbandfec ? "true" : "false",
+ usedtx ? "true" : "false", maxaveragebitrate ? maxaveragebitrate : codec->implementation->bits_per_second);
+
+ if (encoding) {
+ if (SKP_Silk_SDK_Get_Encoder_Size(&encSizeBytes)) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ context->enc_state = switch_core_alloc(codec->memory_pool, encSizeBytes);
+
+ if (SKP_Silk_SDK_InitEncoder(context->enc_state, &context->encoder_object)) {
+ return SWITCH_STATUS_FALSE;
+ }
+
+ context->encoder_object.sampleRate = codec->implementation->actual_samples_per_second;
+ context->encoder_object.packetSize = codec->implementation->samples_per_packet;
+ context->encoder_object.useInBandFec = useinbandfec;
+ context->encoder_object.complexity = 2;
+ context->encoder_object.bitRate = maxaveragebitrate ? maxaveragebitrate : codec->implementation->bits_per_second;
+ context->encoder_object.useDtx = usedtx;
+ }
+
+ if (decoding) {
+ if (SKP_Silk_SDK_Get_Decoder_Size(&decSizeBytes)) {
+ return SWITCH_STATUS_FALSE;
+ }
+ context->dec_state = switch_core_alloc(codec->memory_pool, decSizeBytes);
+
+ if (SKP_Silk_SDK_InitDecoder(context->dec_state)) {
+ return SWITCH_STATUS_FALSE;
+ }
+ context->decoder_object.sampleRate = codec->implementation->actual_samples_per_second;
+ }
+
+ codec->private_info = context;
+
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t switch_silk_destroy(switch_codec_t *codec)
+{
+ codec->private_info = NULL;
+ return SWITCH_STATUS_SUCCESS;
+}
+
+
+static switch_status_t
+switch_silk_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 silk_context *context = codec->private_info;
+ SKP_int16 ret;
+ SKP_int16 nBytes = MAX_BYTES_PER_FRAME * MAX_INPUT_FRAMES;
+
+ ret = SKP_Silk_SDK_Encode(context->enc_state, &context->encoder_object, decoded_data, (SKP_int16) decoded_data_len / 2, encoded_data, &nBytes);
+
+ if (ret) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "SKP_Silk_Encode returned %d!\n", ret);
+ }
+
+ *encoded_data_len = nBytes;
+
+ return SWITCH_STATUS_SUCCESS;
+}
+
+static switch_status_t
+switch_silk_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 silk_context *context = codec->private_info;
+ SKP_int16 ret, len;
+ int16_t *target = decoded_data;
+
+ *decoded_data_len = 0;
+
+ do {
+ ret = SKP_Silk_SDK_Decode(context->dec_state, &context->decoder_object, ((*flag & SFF_PLC)), encoded_data, encoded_data_len, target, &len);
+ if (ret) {
+ switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "SKP_Silk_Decode returned %d!\n", ret);
+ }
+
+ target += len;
+ *decoded_data_len += (len * 2);
+ }
+ while (context->decoder_object.internalDecoderFrames);
+
+ return SWITCH_STATUS_SUCCESS;
+}
+
+SWITCH_MODULE_LOAD_FUNCTION(mod_silk_load)
+{
+ switch_codec_interface_t *codec_interface;
+ *module_interface = switch_loadable_module_create_module_interface(pool, modname);
+
+ SWITCH_ADD_CODEC(codec_interface, "SILK");
+ switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, /* enumeration defining the type of the codec */
+ 117, /* the IANA code number */
+ "SILK", /* the IANA code name */
+ "useinbandfec=false; usedtx=false", /* default fmtp to send (can be overridden by the init function) */
+ 8000, /* samples transferred per second */
+ 8000, /* actual samples transferred per second */
+ 20000, /* bits transferred per second */
+ 20000, /* number of microseconds per frame */
+ 160, /* number of samples per frame */
+ 320, /* 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_silk_init, /* function to initialize a codec handle using this implementation */
+ switch_silk_encode, /* function to encode raw data into encoded data */
+ switch_silk_decode, /* function to decode encoded data into raw data */
+ switch_silk_destroy); /* deinitalize a codec handle using this implementation */
+
+ switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, /* enumeration defining the type of the codec */
+ 118, /* the IANA code number */
+ "SILK", /* the IANA code name */
+ "useinbandfec=false; usedtx=false", /* default fmtp to send (can be overridden by the init function) */
+ 12000, /* samples transferred per second */
+ 12000, /* actual samples transferred per second */
+ 25000, /* bits transferred per second */
+ 20000, /* number of microseconds per frame */
+ 240, /* number of samples per frame */
+ 480, /* 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_silk_init, /* function to initialize a codec handle using this implementation */
+ switch_silk_encode, /* function to encode raw data into encoded data */
+ switch_silk_decode, /* function to decode encoded data into raw data */
+ switch_silk_destroy); /* deinitalize a codec handle using this implementation */
+
+ switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, /* enumeration defining the type of the codec */
+ 119, /* the IANA code number */
+ "SILK", /* the IANA code name */
+ "useinbandfec=false; usedtx=false", /* default fmtp to send (can be overridden by the init function) */
+ 16000, /* samples transferred per second */
+ 16000, /* actual samples transferred per second */
+ 30000, /* bits transferred per second */
+ 20000, /* number of microseconds per frame */
+ 320, /* number of samples per frame */
+ 640, /* 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_silk_init, /* function to initialize a codec handle using this implementation */
+ switch_silk_encode, /* function to encode raw data into encoded data */
+ switch_silk_decode, /* function to decode encoded data into raw data */
+ switch_silk_destroy); /* deinitalize a codec handle using this implementation */
+
+ switch_core_codec_add_implementation(pool, codec_interface, SWITCH_CODEC_TYPE_AUDIO, /* enumeration defining the type of the codec */
+ 120, /* the IANA code number */
+ "SILK", /* the IANA code name */
+ "useinbandfec=false; usedtx=false", /* default fmtp to send (can be overridden by the init function) */
+ 24000, /* samples transferred per second */
+ 24000, /* actual samples transferred per second */
+ 40000, /* bits transferred per second */
+ 20000, /* number of microseconds per frame */
+ 480, /* number of samples per frame */
+ 960, /* 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_silk_init, /* function to initialize a codec handle using this implementation */
+ switch_silk_encode, /* function to encode raw data into encoded data */
+ switch_silk_decode, /* function to decode encoded data into raw data */
+ switch_silk_destroy); /* deinitalize a codec handle using this implementation */
+
+
+ /* indicate that the module should continue to be loaded */
+ return SWITCH_STATUS_SUCCESS;
+}
projects / thirdparty / freeswitch.git / commitdiff
