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-rw-r--r--src/decoder_control.h277
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diff --git a/src/decoder_control.h b/src/decoder_control.h
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-/*
- * Copyright (C) 2003-2011 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_CONTROL_H
-#define MPD_DECODER_CONTROL_H
-
-#include "decoder_command.h"
-#include "audio_format.h"
-
-#include <glib.h>
-
-#include <assert.h>
-
-enum decoder_state {
- DECODE_STATE_STOP = 0,
- DECODE_STATE_START,
- DECODE_STATE_DECODE,
-
- /**
- * The last "START" command failed, because there was an I/O
- * error or because no decoder was able to decode the file.
- * This state will only come after START; once the state has
- * turned to DECODE, by definition no such error can occur.
- */
- DECODE_STATE_ERROR,
-};
-
-struct decoder_control {
- /** the handle of the decoder thread, or NULL if the decoder
- thread isn't running */
- GThread *thread;
-
- /**
- * This lock protects #state and #command.
- */
- GMutex *mutex;
-
- /**
- * Trigger this object after you have modified #command. This
- * is also used by the decoder thread to notify the caller
- * when it has finished a command.
- */
- GCond *cond;
-
- /**
- * The trigger of this object's client. It is signalled
- * whenever an event occurs.
- */
- GCond *client_cond;
-
- enum decoder_state state;
- enum decoder_command command;
-
- bool quit;
- bool seek_error;
- bool seekable;
- double seek_where;
-
- /** the format of the song file */
- struct audio_format in_audio_format;
-
- /** the format being sent to the music pipe */
- struct audio_format out_audio_format;
-
- /**
- * The song currently being decoded. This attribute is set by
- * the player thread, when it sends the #DECODE_COMMAND_START
- * command.
- */
- const struct song *song;
-
- /**
- * The initial seek position (in milliseconds), e.g. to the
- * start of a sub-track described by a CUE file.
- *
- * This attribute is set by dc_start().
- */
- unsigned start_ms;
-
- /**
- * The decoder will stop when it reaches this position (in
- * milliseconds). 0 means don't stop before the end of the
- * file.
- *
- * This attribute is set by dc_start().
- */
- unsigned end_ms;
-
- float total_time;
-
- /** the #music_chunk allocator */
- struct music_buffer *buffer;
-
- /**
- * The destination pipe for decoded chunks. The caller thread
- * owns this object, and is responsible for freeing it.
- */
- struct music_pipe *pipe;
-
- float replay_gain_db;
- float replay_gain_prev_db;
- char *mixramp_start;
- char *mixramp_end;
- char *mixramp_prev_end;
-};
-
-G_GNUC_MALLOC
-struct decoder_control *
-dc_new(GCond *client_cond);
-
-void
-dc_free(struct decoder_control *dc);
-
-/**
- * Locks the #decoder_control object.
- */
-static inline void
-decoder_lock(struct decoder_control *dc)
-{
- g_mutex_lock(dc->mutex);
-}
-
-/**
- * Unlocks the #decoder_control object.
- */
-static inline void
-decoder_unlock(struct decoder_control *dc)
-{
- g_mutex_unlock(dc->mutex);
-}
-
-/**
- * Waits for a signal on the #decoder_control object. This function
- * is only valid in the decoder thread. The object must be locked
- * prior to calling this function.
- */
-static inline void
-decoder_wait(struct decoder_control *dc)
-{
- g_cond_wait(dc->cond, dc->mutex);
-}
-
-/**
- * Signals the #decoder_control object. This function is only valid
- * in the player thread. The object should be locked prior to calling
- * this function.
- */
-static inline void
-decoder_signal(struct decoder_control *dc)
-{
- g_cond_signal(dc->cond);
-}
-
-static inline bool
-decoder_is_idle(const struct decoder_control *dc)
-{
- return dc->state == DECODE_STATE_STOP ||
- dc->state == DECODE_STATE_ERROR;
-}
-
-static inline bool
-decoder_is_starting(const struct decoder_control *dc)
-{
- return dc->state == DECODE_STATE_START;
-}
-
-static inline bool
-decoder_has_failed(const struct decoder_control *dc)
-{
- assert(dc->command == DECODE_COMMAND_NONE);
-
- return dc->state == DECODE_STATE_ERROR;
-}
-
-static inline bool
-decoder_lock_is_idle(struct decoder_control *dc)
-{
- bool ret;
-
- decoder_lock(dc);
- ret = decoder_is_idle(dc);
- decoder_unlock(dc);
-
- return ret;
-}
-
-static inline bool
-decoder_lock_is_starting(struct decoder_control *dc)
-{
- bool ret;
-
- decoder_lock(dc);
- ret = decoder_is_starting(dc);
- decoder_unlock(dc);
-
- return ret;
-}
-
-static inline bool
-decoder_lock_has_failed(struct decoder_control *dc)
-{
- bool ret;
-
- decoder_lock(dc);
- ret = decoder_has_failed(dc);
- decoder_unlock(dc);
-
- return ret;
-}
-
-static inline const struct song *
-decoder_current_song(const struct decoder_control *dc)
-{
- switch (dc->state) {
- case DECODE_STATE_STOP:
- case DECODE_STATE_ERROR:
- return NULL;
-
- case DECODE_STATE_START:
- case DECODE_STATE_DECODE:
- return dc->song;
- }
-
- assert(false);
- return NULL;
-}
-
-/**
- * Start the decoder.
- *
- * @param the decoder
- * @param song the song to be decoded
- * @param start_ms see #decoder_control
- * @param end_ms see #decoder_control
- * @param pipe the pipe which receives the decoded chunks (owned by
- * the caller)
- */
-void
-dc_start(struct decoder_control *dc, struct song *song,
- unsigned start_ms, unsigned end_ms,
- struct music_buffer *buffer, struct music_pipe *pipe);
-
-void
-dc_stop(struct decoder_control *dc);
-
-bool
-dc_seek(struct decoder_control *dc, double where);
-
-void
-dc_quit(struct decoder_control *dc);
-
-void
-dc_mixramp_start(struct decoder_control *dc, char *mixramp_start);
-
-void
-dc_mixramp_end(struct decoder_control *dc, char *mixramp_end);
-
-void
-dc_mixramp_prev_end(struct decoder_control *dc, char *mixramp_prev_end);
-
-#endif