81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "MusicChunk.hxx"
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#include "AudioFormat.hxx"
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#include "tag/Tag.hxx"
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#include <assert.h>
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music_chunk::~music_chunk()
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{
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delete tag;
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}
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#ifndef NDEBUG
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bool
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music_chunk::CheckFormat(const AudioFormat other_format) const
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{
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assert(other_format.IsValid());
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return length == 0 || audio_format == other_format;
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}
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#endif
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WritableBuffer<void>
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music_chunk::Write(const AudioFormat af,
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float data_time, uint16_t _bit_rate)
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{
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assert(CheckFormat(af));
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assert(length == 0 || audio_format.IsValid());
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if (length == 0) {
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/* if the chunk is empty, nobody has set bitRate and
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times yet */
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bit_rate = _bit_rate;
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times = data_time;
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}
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const size_t frame_size = af.GetFrameSize();
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size_t num_frames = (sizeof(data) - length) / frame_size;
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if (num_frames == 0)
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return WritableBuffer<void>::Null();
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#ifndef NDEBUG
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audio_format = af;
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#endif
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return { data + length, num_frames * frame_size };
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}
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bool
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music_chunk::Expand(const AudioFormat af, size_t _length)
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{
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const size_t frame_size = af.GetFrameSize();
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assert(length + _length <= sizeof(data));
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assert(audio_format == af);
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length += _length;
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return length + frame_size > sizeof(data);
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}
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