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/*
* Copyright (C) 2012 Mamadou Diop.
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
/**@file tdav_codec_t140.c
* @brief T140 codec implementation (RFC 4103)
*/
#include "tinydav/codecs/t140/tdav_codec_t140.h"
#include "tsk_string.h"
#include "tsk_memory.h"
#include "tsk_debug.h"
// RFC 4103 - 6. Parameter for Character Transmission Rate
#define TDAV_CODEC_T140_CPS 30
static int tdav_codec_t140_set(tmedia_codec_t* self, const struct tmedia_param_s* param)
{
return 0;
}
static int tdav_codec_t140_open(tmedia_codec_t* self)
{
return 0;
}
static int tdav_codec_t140_close(tmedia_codec_t* self)
{
return 0;
}
static tsk_size_t tdav_codec_t140_encode(tmedia_codec_t* self, const void* in_data, tsk_size_t in_size, void** out_data, tsk_size_t* out_max_size)
{
tsk_size_t out_size = in_size;
if(!self || !in_data || !in_size || !out_data){
TSK_DEBUG_ERROR("Invalid parameter");
return 0;
}
if(*out_max_size <out_size){
if(!(*out_data = tsk_realloc(*out_data, out_size))){
TSK_DEBUG_ERROR("Failed to allocate new buffer");
*out_max_size = 0;
return 0;
}
*out_max_size = out_size;
}
memcpy(*out_data, in_data, out_size);
return out_size;
}
static tsk_size_t tdav_codec_t140_decode(tmedia_codec_t* self, const void* in_data, tsk_size_t in_size, void** out_data, tsk_size_t* out_max_size, const tsk_object_t* proto_hdr)
{
tsk_size_t out_size = in_size;
if(!self || !in_data || !in_size || !out_data){
TSK_DEBUG_ERROR("Invalid parameter");
return 0;
}
/* allocate new buffer */
if(*out_max_size < out_size){
if(!(*out_data = tsk_realloc(*out_data, out_size))){
TSK_DEBUG_ERROR("Failed to allocate new buffer");
*out_max_size = 0;
return 0;
}
*out_max_size = out_size;
}
memcpy(*out_data, in_data, out_size);
return out_size;
}
static tsk_bool_t tdav_codec_t140_sdp_att_match(const tmedia_codec_t* self, const char* att_name, const char* att_value)
{
return tsk_true;
}
static char* tdav_codec_t140_sdp_att_get(const tmedia_codec_t* self, const char* att_name)
{
if(!self || !att_name){
TSK_DEBUG_ERROR("Invalid parameter");
return tsk_null;
}
if(tsk_striequals("fmtp", att_name)){
char* fmtp = tsk_null;
tsk_sprintf(&fmtp, "cps=%d", TDAV_CODEC_T140_CPS);
return fmtp;
}
return tsk_null;
}
//
// G.711u Plugin definition
//
/* constructor */
static tsk_object_t* tdav_codec_t140_ctor(tsk_object_t * self, va_list * app)
{
tdav_codec_t140_t *t140 = self;
if(t140){
/* init base: called by tmedia_codec_create() */
/* init self */
}
return self;
}
/* destructor */
static tsk_object_t* tdav_codec_t140_dtor(tsk_object_t * self)
{
tdav_codec_t140_t *t140 = self;
if(t140){
/* deinit base */
/* deinit self */
}
return self;
}
/* object definition */
static const tsk_object_def_t tdav_codec_t140_def_s =
{
sizeof(tdav_codec_t140_t),
tdav_codec_t140_ctor,
tdav_codec_t140_dtor,
tmedia_codec_cmp,
};
/* plugin definition*/
static const tmedia_codec_plugin_def_t tdav_codec_t140_plugin_def_s =
{
&tdav_codec_t140_def_s,
tmedia_t140,
tmedia_codec_id_t140,
"t140",
"T140 codec (From tinyDAV)",
TMEDIA_CODEC_FORMAT_T140,
tsk_true,
1000, // rate
/* audio */
{0},
/* video */
{0},
tdav_codec_t140_set,
tdav_codec_t140_open,
tdav_codec_t140_close,
tdav_codec_t140_encode,
tdav_codec_t140_decode,
tdav_codec_t140_sdp_att_match,
tdav_codec_t140_sdp_att_get
};
const tmedia_codec_plugin_def_t *tdav_codec_t140_plugin_def_t = &tdav_codec_t140_plugin_def_s;
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