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add ilbc

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git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@1199 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Anthony Minessale
2006-04-19 19:04:30 +00:00
parent a128d3179e
commit 56cb227eb7
6 changed files with 133 additions and 74 deletions
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161
src/mod/codecs/mod_ilbc/mod_ilbc.c
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@@ -32,12 +32,16 @@
#include "switch.h"
#include "iLBC_encode.h"
#include "iLBC_decode.h"
#include "iLBC_define.h"
static const char modname[] = "mod_ilbc";
struct ilbc_context {
iLBC_Enc_Inst_t encoder;
iLBC_Dec_Inst_t decoder;
uint8_t ms;
uint16_t bytes;
uint16_t dbytes;
};
static switch_status switch_ilbc_init(switch_codec *codec, switch_codec_flag flags,
@@ -45,6 +49,13 @@ static switch_status switch_ilbc_init(switch_codec *codec, switch_codec_flag fla
{
struct ilbc_context *context;
int encoding, decoding;
uint8_t ms = codec->implementation->microseconds_per_frame / 1000;
if (ms != 20 && ms != 30) {
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_ERROR, "invalid speed! (I should never happen)\n");
return SWITCH_STATUS_FALSE;
}
encoding = (flags & SWITCH_CODEC_FLAG_ENCODE);
decoding = (flags & SWITCH_CODEC_FLAG_DECODE);
@@ -53,10 +64,21 @@ static switch_status switch_ilbc_init(switch_codec *codec, switch_codec_flag fla
return SWITCH_STATUS_FALSE;
} else {
context = switch_core_alloc(codec->memory_pool, sizeof(*context));
if (encoding)
initEncode(&context->encoder, 30);
if (decoding)
initDecode(&context->decoder, 30, 0);
context->ms = ms;
if (context->ms == 20) {
context->bytes = NO_OF_BYTES_20MS;
context->dbytes = 320;
} else {
context->bytes = NO_OF_BYTES_30MS;
context->dbytes = 480;
}
if (encoding) {
initEncode(&context->encoder, context->ms);
}
if (decoding) {
initDecode(&context->decoder, context->ms, 1);
}
}
codec->private_info = context;
@@ -70,35 +92,38 @@ static switch_status switch_ilbc_destroy(switch_codec *codec)
return SWITCH_STATUS_SUCCESS;
}
static switch_status switch_ilbc_encode(switch_codec *codec,
switch_codec *other_codec,
void *decoded_data,
size_t decoded_data_len,
int decoded_rate,
void *encoded_data,
size_t *encoded_data_len,
int *encoded_rate,
unsigned int *flag)
static switch_status switch_ilbc_encode(switch_codec *codec,
switch_codec *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 ilbc_context *context = codec->private_info;
int cbret = 0;
if (!context) {
return SWITCH_STATUS_FALSE;
}
if (decoded_data_len % 320 == 0) {
if (decoded_data_len % context->dbytes == 0) {
unsigned int new_len = 0;
ilbc_signal * ddp = decoded_data;
ilbc_byte * edp = encoded_data;
int x;
int loops = (int) decoded_data_len / 320;
unsigned char *edp = encoded_data;
short *ddp = decoded_data;
int x, y;
int loops = (int) decoded_data_len / context->dbytes;
float buf[240];
for (x = 0; x < loops && new_len < *encoded_data_len; x++) {
iLBC_encode(context->encoder, ddp, edp);
edp += 33;
ddp += 160;
new_len += 33;
for(y = 0; y < context->dbytes / sizeof(short) ; y++) {
buf[y] = ddp[y];
}
iLBC_encode(edp, buf, &context->encoder);
edp += context->bytes;
ddp += context->dbytes;
new_len += context->bytes;
}
if (new_len <= *encoded_data_len) {
*encoded_data_len = new_len;
@@ -110,17 +135,15 @@ static switch_status switch_ilbc_encode(switch_codec *codec,
return SWITCH_STATUS_SUCCESS;
}
static switch_status switch_ilbc_decode(switch_codec *codec,
switch_codec *other_codec,
static switch_status switch_ilbc_decode(switch_codec *codec,
switch_codec *other_codec,
void *encoded_data,
size_t encoded_data_len,
int encoded_rate,
uint32_t encoded_data_len,
uint32_t encoded_rate,
void *decoded_data,
size_t *decoded_data_len,
int *decoded_rate,
unsigned int *flag)
uint32_t *decoded_data_len,
uint32_t *decoded_rate,
unsigned int *flag)
{
struct ilbc_context *context = codec->private_info;
@@ -128,18 +151,23 @@ static switch_status switch_ilbc_decode(switch_codec *codec,
return SWITCH_STATUS_FALSE;
}
if (encoded_data_len % 33 == 0) {
int loops = (int) encoded_data_len / 33;
ilbc_byte * edp = encoded_data;
ilbc_signal * ddp = decoded_data;
int x;
if (encoded_data_len % context->bytes == 0) {
int loops = (int) encoded_data_len / context->bytes;
unsigned char *edp = encoded_data;
short *ddp = decoded_data;
int x,y;
unsigned int new_len = 0;
float buf[240];
for (x = 0; x < loops && new_len < *decoded_data_len; x++) {
iLBC_decode(context->decoder, edp, ddp);
ddp += 160;
edp += 33;
new_len += 320;
iLBC_decode(buf, edp, &context->decoder, 1);
for(y = 0; y < context->dbytes / sizeof(short) ; y++) {
ddp[y] = buf[y];
}
ddp += context->dbytes / sizeof(short);
edp += context->bytes;
new_len += context->dbytes;
}
if (new_len <= *decoded_data_len) {
*decoded_data_len = new_len;
@@ -156,29 +184,46 @@ static switch_status switch_ilbc_decode(switch_codec *codec,
/* Registration */
static const switch_codec_implementation ilbc_8k_implementation = {
static const switch_codec_implementation ilbc_8k_30ms_implementation = {
/*.samples_per_second */ 8000,
/*.bits_per_second */ 13200,
/*.microseconds_per_frame */ 20000,
/*.samples_per_frame */ 160,
/*.bytes_per_frame */ 320,
/*.encoded_bytes_per_frame */ 33,
/*.number_of_channels */ 1,
/*.pref_frames_per_packet */ 1,
/*.max_frames_per_packet */ 1,
/*.init */ switch_ilbc_init,
/*.encode */ switch_ilbc_encode,
/*.decode */ switch_ilbc_decode,
/*.destroy */ switch_ilbc_destroy,
/*.bits_per_second */ NO_OF_BYTES_30MS*8*8000/BLOCKL_30MS,
/*.microseconds_per_frame */ 30000,
/*.samples_per_frame */ 240,
/*.bytes_per_frame */ 480,
/*.encoded_bytes_per_frame */ NO_OF_BYTES_30MS,
/*.number_of_channels */ 1,
/*.pref_frames_per_packet */ 1,
/*.max_frames_per_packet */ 1,
/*.init */ switch_ilbc_init,
/*.encode */ switch_ilbc_encode,
/*.decode */ switch_ilbc_decode,
/*.destroy */ switch_ilbc_destroy
};
static const switch_codec_implementation ilbc_8k_20ms_implementation = {
/*.samples_per_second */ 8000,
/*.bits_per_second */ NO_OF_BYTES_20MS*8*8000/BLOCKL_20MS,
/*.microseconds_per_frame */ 20000,
/*.samples_per_frame */ 160,
/*.bytes_per_frame */ 320,
/*.encoded_bytes_per_frame */ NO_OF_BYTES_20MS,
/*.number_of_channels */ 1,
/*.pref_frames_per_packet */ 1,
/*.max_frames_per_packet */ 1,
/*.init */ switch_ilbc_init,
/*.encode */ switch_ilbc_encode,
/*.decode */ switch_ilbc_decode,
/*.destroy */ switch_ilbc_destroy,
/*.next */ &ilbc_8k_30ms_implementation
};
static const switch_codec_interface ilbc_codec_interface = {
/*.interface_name */ "ilbc",
/*.codec_type */ SWITCH_CODEC_TYPE_AUDIO,
/*.ianacode */ 3,
/*.iananame */ "ilbc",
/*.implementations */ &ilbc_8k_implementation,
/*.ianacode */ 97,
/*.iananame */ "iLBC",
/*.implementations */ &ilbc_8k_20ms_implementation,
};