src/decoder_internal.h

   1 /*
   2  * Copyright (C) 2003-2010 The Music Player Daemon Project
   3  * http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #ifndef MPD_DECODER_INTERNAL_H
  21 #define MPD_DECODER_INTERNAL_H
  22
  23 #include "decoder_command.h"
  24 #include "pcm_convert.h"
  25 #include "replay_gain_info.h"
  26
  27 struct input_stream;
  28
  29 struct decoder {
  30         struct decoder_control *dc;
  31
  32         struct pcm_convert_state conv_state;
  33
  34         /**
  35          * The time stamp of the next data chunk, in seconds.
  36          */
  37         double timestamp;
  38
  39         bool seeking;
  40
  41         /**
  42          * The tag from the song object.  This is only used for local
  43          * files, because we expect the stream server to send us a new
  44          * tag each time we play it.
  45          */
  46         struct tag *song_tag;
  47
  48         /** the last tag received from the stream */
  49         struct tag *stream_tag;
  50
  51         /** the last tag received from the decoder plugin */
  52         struct tag *decoder_tag;
  53
  54         /** the chunk currently being written to */
  55         struct music_chunk *chunk;
  56
  57         struct replay_gain_info replay_gain_info;
  58
  59         /**
  60          * A positive serial number for checking if replay gain info
  61          * has changed since the last check.
  62          */
  63         unsigned replay_gain_serial;
  64 };
  65
  66 /**
  67  * Returns the current chunk the decoder writes to, or allocates a new
  68  * chunk if there is none.
  69  *
  70  * @return the chunk, or NULL if we have received a decoder command
  71  */
  72 struct music_chunk *
  73 decoder_get_chunk(struct decoder *decoder, struct input_stream *is);
  74
  75 /**
  76  * Flushes the current chunk.
  77  */
  78 void
  79 decoder_flush_chunk(struct decoder *decoder);
  80
  81 #endif