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/*
* Copyright (c) 2018-2020, the SerenityOS developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/ByteBuffer.h>
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <AK/StringView.h>
#include <LibAudio/Buffer.h>
#include <LibCore/File.h>
namespace Audio {
class LoaderPlugin {
public:
virtual ~LoaderPlugin() { }
virtual bool sniff() = 0;
virtual bool has_error() { return false; }
virtual const char* error_string() { return ""; }
virtual RefPtr<Buffer> get_more_samples(size_t max_bytes_to_read_from_input = 128 * KiB) = 0;
virtual void reset() = 0;
virtual void seek(const int position) = 0;
virtual int loaded_samples() = 0;
virtual int total_samples() = 0;
virtual u32 sample_rate() = 0;
virtual u16 num_channels() = 0;
virtual u16 bits_per_sample() = 0;
virtual RefPtr<Core::File> file() = 0;
};
class Loader : public RefCounted<Loader> {
public:
static NonnullRefPtr<Loader> create(const StringView& path) { return adopt(*new Loader(path)); }
static NonnullRefPtr<Loader> create(const ByteBuffer& buffer) { return adopt(*new Loader(buffer)); }
bool has_error() const { return m_plugin ? m_plugin->has_error() : true; }
const char* error_string() const { return m_plugin ? m_plugin->error_string() : "No loader plugin available"; }
RefPtr<Buffer> get_more_samples(size_t max_bytes_to_read_from_input = 128 * KiB) const { return m_plugin ? m_plugin->get_more_samples(max_bytes_to_read_from_input) : nullptr; }
void reset() const
{
if (m_plugin)
m_plugin->reset();
}
void seek(const int position) const
{
if (m_plugin)
m_plugin->seek(position);
}
int loaded_samples() const { return m_plugin ? m_plugin->loaded_samples() : 0; }
int total_samples() const { return m_plugin ? m_plugin->total_samples() : 0; }
u32 sample_rate() const { return m_plugin ? m_plugin->sample_rate() : 0; }
u16 num_channels() const { return m_plugin ? m_plugin->num_channels() : 0; }
u16 bits_per_sample() const { return m_plugin ? m_plugin->bits_per_sample() : 0; }
RefPtr<Core::File> file() const { return m_plugin ? m_plugin->file() : nullptr; }
private:
Loader(const StringView& path);
Loader(const ByteBuffer& buffer);
mutable OwnPtr<LoaderPlugin> m_plugin;
};
}
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