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/*
* Copyright (C) 2003-2014 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "MusicChunk.hxx"
#include "AudioFormat.hxx"
#include "tag/Tag.hxx"
#include <assert.h>
MusicChunk::~MusicChunk()
{
delete tag;
}
#ifndef NDEBUG
bool
MusicChunk::CheckFormat(const AudioFormat other_format) const
{
assert(other_format.IsValid());
return length == 0 || audio_format == other_format;
}
#endif
WritableBuffer<void>
MusicChunk::Write(const AudioFormat af,
SongTime data_time, uint16_t _bit_rate)
{
assert(CheckFormat(af));
assert(length == 0 || audio_format.IsValid());
if (length == 0) {
/* if the chunk is empty, nobody has set bitRate and
time yet */
bit_rate = _bit_rate;
time = data_time;
}
const size_t frame_size = af.GetFrameSize();
size_t num_frames = (sizeof(data) - length) / frame_size;
if (num_frames == 0)
return WritableBuffer<void>::Null();
#ifndef NDEBUG
audio_format = af;
#endif
return { data + length, num_frames * frame_size };
}
bool
MusicChunk::Expand(const AudioFormat af, size_t _length)
{
const size_t frame_size = af.GetFrameSize();
assert(length + _length <= sizeof(data));
assert(audio_format == af);
length += _length;
return length + frame_size > sizeof(data);
}
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