/* * Copyright 2003-2016 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. */ #ifndef MPD_DECODER_INTERNAL_HXX #define MPD_DECODER_INTERNAL_HXX #include "ReplayGainInfo.hxx" #include class PcmConvert; struct MusicChunk; struct DecoderControl; struct Tag; struct Decoder { DecoderControl &dc; /** * For converting input data to the configured audio format. * nullptr means no conversion necessary. */ PcmConvert *convert = nullptr; /** * The time stamp of the next data chunk, in seconds. */ double timestamp = 0; /** * Is the initial seek (to the start position of the sub-song) * pending, or has it been performed already? */ bool initial_seek_pending; /** * Is the initial seek currently running? During this time, * the decoder command is SEEK. This flag is set by * decoder_get_virtual_command(), when the virtual SEEK * command is generated for the first time. */ bool initial_seek_running = false; /** * This flag is set by decoder_seek_time(), and checked by * decoder_command_finished(). It is used to clean up after * seeking. */ bool seeking = false; /** * The tag from the song object. This is only used for local * files, because we expect the stream server to send us a new * tag each time we play it. */ Tag *song_tag; /** the last tag received from the stream */ Tag *stream_tag = nullptr; /** the last tag received from the decoder plugin */ Tag *decoder_tag = nullptr; /** the chunk currently being written to */ MusicChunk *chunk = nullptr; ReplayGainInfo replay_gain_info; /** * A positive serial number for checking if replay gain info * has changed since the last check. */ unsigned replay_gain_serial = 0; /** * An error has occurred (in DecoderAPI.cxx), and the plugin * will be asked to stop. */ std::exception_ptr error; Decoder(DecoderControl &_dc, bool _initial_seek_pending, Tag *_tag) :dc(_dc), initial_seek_pending(_initial_seek_pending), song_tag(_tag) {} ~Decoder(); /** * Returns the current chunk the decoder writes to, or allocates a new * chunk if there is none. * * @return the chunk, or NULL if we have received a decoder command */ MusicChunk *GetChunk(); /** * Flushes the current chunk. * * Caller must not lock the #DecoderControl object. */ void FlushChunk(); }; #endif