/*
* Copyright (C) 2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
* 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 tmedia_resampler.c
 * @brief Audio Resample plugin
 *
 * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
 */
#include "tinymedia/tmedia_resampler.h"

#include "tsk_debug.h"

static const tmedia_resampler_plugin_def_t* __tmedia_resampler_plugin = tsk_null;

int tmedia_resampler_init(tmedia_resampler_t* self)
{
    if(!self) {
        TSK_DEBUG_ERROR("Invalid parameter");
        return -1;
    }
    return 0;
}

int tmedia_resampler_open(tmedia_resampler_t* self, uint32_t in_freq, uint32_t out_freq, uint32_t frame_duration, uint32_t in_channels, uint32_t out_channels, uint32_t quality, uint32_t bits_per_sample)
{
    int ret;

    if (!self || !self->plugin || !self->plugin->open) {
        TSK_DEBUG_ERROR("Invalid parameter");
        return -1;
    }
    if (self->opened) {
        TSK_DEBUG_WARN("Resampler already opened");
        return 0;
    }

    if ((ret = self->plugin->open(self, in_freq, out_freq, frame_duration, in_channels, out_channels, quality, bits_per_sample))) {
        TSK_DEBUG_ERROR("Failed to open [%s] resamplerr", self->plugin->desc);
        return ret;
    }
    else {
        self->opened = tsk_true;
        return 0;
    }
}

tsk_size_t tmedia_resampler_process(tmedia_resampler_t* self, const void* in_data, tsk_size_t in_size_in_sample, void* out_data, tsk_size_t out_size_in_sample)
{
    if (!self || !in_data || !in_size_in_sample || !out_size_in_sample || !self->plugin || !self->plugin->process) {
        TSK_DEBUG_ERROR("Invalid parameter");
        return 0;
    }
    if (!self->opened) {
        TSK_DEBUG_ERROR("Resampler not opened");
        return 0;
    }
    return self->plugin->process(self, in_data, in_size_in_sample, out_data, out_size_in_sample);
}

int tmedia_resampler_close(tmedia_resampler_t* self)
{
    if (!self || !self->plugin) {
        TSK_DEBUG_ERROR("Invalid parameter");
        return -1;
    }
    if (!self->opened) {
        TSK_DEBUG_WARN("Resampler not opened");
        return 0;
    }

    if (self->plugin->close) {
        int ret;

        if ((ret = self->plugin->close(self))) {
            TSK_DEBUG_ERROR("Failed to close [%s] resamplerr", self->plugin->desc);
            return ret;
        }
        else {
            self->opened = tsk_false;
            return 0;
        }
    }
    else {
        self->opened = tsk_false;
        return 0;
    }
}

int tmedia_resampler_deinit(tmedia_resampler_t* self)
{
    if(!self) {
        TSK_DEBUG_ERROR("Invalid parameter");
        return -1;
    }

    if(self->opened) {
        tmedia_resampler_close(self);
    }

    return 0;
}

int tmedia_resampler_plugin_register(const tmedia_resampler_plugin_def_t* plugin)
{
    if(!plugin) {
        TSK_DEBUG_ERROR("Invalid parameter");
        return -1;
    }
    if(!__tmedia_resampler_plugin) {
        TSK_DEBUG_INFO("Register resampler: %s", plugin->desc);
        __tmedia_resampler_plugin = plugin;
    }
    return 0;
}

int tmedia_resampler_plugin_unregister(const tmedia_resampler_plugin_def_t* plugin)
{
    (void)(plugin);
    __tmedia_resampler_plugin = tsk_null;
    return 0;
}

tmedia_resampler_t* tmedia_resampler_create()
{
    tmedia_resampler_t* resampler = tsk_null;

    if(__tmedia_resampler_plugin) {
        if((resampler = (tmedia_resampler_t*)tsk_object_new(__tmedia_resampler_plugin->objdef))) {
            resampler->plugin = __tmedia_resampler_plugin;
        }
    }
    return resampler;
}