forked from Mirrors/freeswitch
Ok this actually passes the right RTP sizes but no audio. Work in progress
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@2496 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
parent
8da1a310a2
commit
19f860e274
|
@ -0,0 +1,16 @@
|
|||
LDFLAGS +=-llpc10
|
||||
|
||||
all: depends $(MODNAME).$(DYNAMIC_LIB_EXTEN)
|
||||
|
||||
depends:
|
||||
MAKE=$(MAKE) $(BASE)/build/buildlib.sh $(BASE) install codec/lpc10 --prefix=$(PREFIX)
|
||||
|
||||
$(MODNAME).$(DYNAMIC_LIB_EXTEN): $(MODNAME).c ../../../include/switch_bitpack.h
|
||||
$(CC) $(CFLAGS) -fPIC -c $(MODNAME).c -o $(MODNAME).o
|
||||
$(CC) $(SOLINK) $(MODNAME).o -o $(MODNAME).$(DYNAMIC_LIB_EXTEN) $(LDFLAGS)
|
||||
|
||||
clean:
|
||||
rm -fr *.$(DYNAMIC_LIB_EXTEN) *.o *~
|
||||
|
||||
install:
|
||||
cp -f $(MODNAME).$(DYNAMIC_LIB_EXTEN) $(PREFIX)/mod
|
|
@ -0,0 +1,214 @@
|
|||
/*
|
||||
* 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):
|
||||
*
|
||||
* Brian K. West <brian.west@mac.com>
|
||||
*
|
||||
*
|
||||
* mod_lpc10.c -- LPC10 Codec Module
|
||||
*
|
||||
*/
|
||||
|
||||
#include "switch.h"
|
||||
#include "lpc10/lpc10.h"
|
||||
|
||||
enum {
|
||||
SamplesPerFrame = 180,
|
||||
BitsPerFrame = 54,
|
||||
BytesPerFrame = (BitsPerFrame+7)/8,
|
||||
BitsPerSecond = 2400
|
||||
};
|
||||
|
||||
#define SampleValueScale 32768.0
|
||||
#define MaxSampleValue 32767.0
|
||||
#define MinSampleValue -32767.0
|
||||
|
||||
static const char modname[] = "mod_lpc10";
|
||||
|
||||
struct lpc10_context {
|
||||
struct lpc10_encoder_state encoder_object;
|
||||
struct lpc10_decoder_state decoder_object;
|
||||
};
|
||||
|
||||
static switch_status_t switch_lpc10_init(switch_codec_t *codec, switch_codec_flag_t flags,
|
||||
const switch_codec_settings_t *codec_settings)
|
||||
{
|
||||
uint32_t encoding, decoding;
|
||||
struct lpc10_context *context = NULL;
|
||||
|
||||
encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
|
||||
decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
|
||||
|
||||
if (!(encoding || decoding) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(struct lpc10_context))))) {
|
||||
return SWITCH_STATUS_FALSE;
|
||||
} else {
|
||||
|
||||
if (encoding) {
|
||||
init_lpc10_encoder_state(&context->encoder_object);
|
||||
}
|
||||
|
||||
if (decoding) {
|
||||
init_lpc10_decoder_state(&context->decoder_object);
|
||||
}
|
||||
|
||||
codec->private_info = context;
|
||||
|
||||
return SWITCH_STATUS_SUCCESS;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static switch_status_t switch_lpc10_destroy(switch_codec_t *codec)
|
||||
{
|
||||
codec->private_info = NULL;
|
||||
return SWITCH_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
static switch_status_t switch_lpc10_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 lpc10_context *context = codec->private_info;
|
||||
int i;
|
||||
INT32 bits[BitsPerFrame];
|
||||
real speech[SamplesPerFrame];
|
||||
short * sampleBuffer = (short *)encoded_data;
|
||||
unsigned char * buffer = (unsigned char *)decoded_data;
|
||||
|
||||
|
||||
|
||||
if (!context) {
|
||||
return SWITCH_STATUS_FALSE;
|
||||
}
|
||||
|
||||
for (i = 0; i < SamplesPerFrame; i++)
|
||||
speech[i] = (real)(sampleBuffer[i]/SampleValueScale);
|
||||
|
||||
lpc10_encode(speech, bits, &context->encoder_object);
|
||||
|
||||
memset(encoded_data, 0, BytesPerFrame);
|
||||
for (i = 0; i < BitsPerFrame; i++) {
|
||||
if (bits[i])
|
||||
buffer[i>>3] |= 1 << (i&7);
|
||||
}
|
||||
|
||||
*encoded_data_len = BytesPerFrame;
|
||||
|
||||
return SWITCH_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
static switch_status_t switch_lpc10_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 lpc10_context *context = codec->private_info;
|
||||
int i;
|
||||
INT32 bits[BitsPerFrame];
|
||||
real speech[SamplesPerFrame];
|
||||
short * sampleBuffer = (short *)decoded_data;
|
||||
unsigned char * buffer = (unsigned char *)encoded_data;
|
||||
|
||||
if (!context) {
|
||||
return SWITCH_STATUS_FALSE;
|
||||
}
|
||||
|
||||
for (i = 0; i < BitsPerFrame; i++)
|
||||
bits[i] = (buffer[i>>3]&(1<<(i&7))) != 0;
|
||||
|
||||
lpc10_decode(bits, speech, &context->decoder_object);
|
||||
|
||||
for (i = 0; i < SamplesPerFrame; i++) {
|
||||
real sample = (real)(speech[i]*SampleValueScale);
|
||||
if (sample < MinSampleValue)
|
||||
sample = MinSampleValue;
|
||||
else if (sample > MaxSampleValue)
|
||||
sample = MaxSampleValue;
|
||||
sampleBuffer[i] = (short)sample;
|
||||
}
|
||||
|
||||
*decoded_data_len = SamplesPerFrame*2;
|
||||
|
||||
return SWITCH_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
/* Registration */
|
||||
|
||||
static const switch_codec_implementation_t lpc10_implementation = {
|
||||
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
|
||||
/*.ianacode */ 7,
|
||||
/*.iananame */ "LPC",
|
||||
/*.samples_per_second */ 8000,
|
||||
/*.bits_per_second */ 240,
|
||||
/*.microseconds_per_frame */ 22500,
|
||||
/*.samples_per_frame */ 180,
|
||||
/*.bytes_per_frame */ 360,
|
||||
/*.encoded_bytes_per_frame */ 7,
|
||||
/*.number_of_channels */ 1,
|
||||
/*.pref_frames_per_packet */ 1,
|
||||
/*.max_frames_per_packet */ 1,
|
||||
/*.init */ switch_lpc10_init,
|
||||
/*.encode */ switch_lpc10_encode,
|
||||
/*.decode */ switch_lpc10_decode,
|
||||
/*.destroy */ switch_lpc10_destroy,
|
||||
};
|
||||
|
||||
const switch_codec_interface_t lpc10_codec_interface = {
|
||||
/*.interface_name */ "LPC-10 2.4kbps",
|
||||
/*.implementations */ &lpc10_implementation,
|
||||
};
|
||||
|
||||
static switch_loadable_module_interface_t lpc10_module_interface = {
|
||||
/*.module_name */ modname,
|
||||
/*.endpoint_interface */ NULL,
|
||||
/*.timer_interface */ NULL,
|
||||
/*.dialplan_interface */ NULL,
|
||||
/*.codec_interface */ &lpc10_codec_interface,
|
||||
/*.application_interface */ NULL
|
||||
};
|
||||
|
||||
SWITCH_MOD_DECLARE(switch_status_t) switch_module_load(const switch_loadable_module_interface_t **module_interface,
|
||||
char *filename)
|
||||
{
|
||||
/* connect my internal structure to the blank pointer passed to me */
|
||||
*module_interface = &lpc10_module_interface;
|
||||
|
||||
/* indicate that the module should continue to be loaded */
|
||||
return SWITCH_STATUS_SUCCESS;
|
||||
}
|
Loading…
Reference in New Issue