mixer_all: convert to C++

1 files changed, 173 insertions, 0 deletions

diff --git a/src/OutputAll.hxx b/src/OutputAll.hxx
new file mode 100644
index 000000000..becf4b695
--- /dev/null
+++ b/src/OutputAll.hxx
@@ -0,0 +1,173 @@
+/*
+ * 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.
+ */
+
+/*
+ * Functions for dealing with all configured (enabled) audion outputs
+ * at once.
+ *
+ */
+
+#ifndef OUTPUT_ALL_H
+#define OUTPUT_ALL_H
+
+#include "replay_gain_info.h"
+#include "gerror.h"
+
+#include <stdbool.h>
+#include <stddef.h>
+
+struct audio_format;
+struct music_buffer;
+struct music_chunk;
+struct player_control;
+
+/**
+ * Global initialization: load audio outputs from the configuration
+ * file and initialize them.
+ */
+void
+audio_output_all_init(struct player_control *pc);
+
+/**
+ * Global finalization: free memory occupied by audio outputs.  All
+ */
+void
+audio_output_all_finish(void);
+
+/**
+ * Returns the total number of audio output devices, including those
+ * who are disabled right now.
+ */
+unsigned int audio_output_count(void);
+
+/**
+ * Returns the "i"th audio output device.
+ */
+struct audio_output *
+audio_output_get(unsigned i);
+
+/**
+ * Returns the audio output device with the specified name.  Returns
+ * NULL if the name does not exist.
+ */
+struct audio_output *
+audio_output_find(const char *name);
+
+/**
+ * Checks the "enabled" flag of all audio outputs, and if one has
+ * changed, commit the change.
+ */
+void
+audio_output_all_enable_disable(void);
+
+/**
+ * Opens all audio outputs which are not disabled.
+ *
+ * @param audio_format the preferred audio format, or NULL to reuse
+ * the previous format
+ * @param buffer the #music_buffer where consumed #music_chunk objects
+ * should be returned
+ * @return true on success, false on failure
+ */
+bool
+audio_output_all_open(const struct audio_format *audio_format,
+		      struct music_buffer *buffer,
+		      GError **error_r);
+
+/**
+ * Closes all audio outputs.
+ */
+void
+audio_output_all_close(void);
+
+/**
+ * Closes all audio outputs.  Outputs with the "always_on" flag are
+ * put into pause mode.
+ */
+void
+audio_output_all_release(void);
+
+void
+audio_output_all_set_replay_gain_mode(enum replay_gain_mode mode);
+
+/**
+ * Enqueue a #music_chunk object for playing, i.e. pushes it to a
+ * #music_pipe.
+ *
+ * @param chunk the #music_chunk object to be played
+ * @return true on success, false if no audio output was able to play
+ * (all closed then)
+ */
+bool
+audio_output_all_play(struct music_chunk *chunk, GError **error_r);
+
+/**
+ * Checks if the output devices have drained their music pipe, and
+ * returns the consumed music chunks to the #music_buffer.
+ *
+ * @return the number of chunks to play left in the #music_pipe
+ */
+unsigned
+audio_output_all_check(void);
+
+/**
+ * Checks if the size of the #music_pipe is below the #threshold.  If
+ * not, it attempts to synchronize with all output threads, and waits
+ * until another #music_chunk is finished.
+ *
+ * @param threshold the maximum number of chunks in the pipe
+ * @return true if there are less than #threshold chunks in the pipe
+ */
+bool
+audio_output_all_wait(struct player_control *pc, unsigned threshold);
+
+/**
+ * Puts all audio outputs into pause mode.  Most implementations will
+ * simply close it then.
+ */
+void
+audio_output_all_pause(void);
+
+/**
+ * Drain all audio outputs.
+ */
+void
+audio_output_all_drain(void);
+
+/**
+ * Try to cancel data which may still be in the device's buffers.
+ */
+void
+audio_output_all_cancel(void);
+
+/**
+ * Indicate that a new song will begin now.
+ */
+void
+audio_output_all_song_border(void);
+
+/**
+ * Returns the "elapsed_time" stamp of the most recently finished
+ * chunk.  A negative value is returned when no chunk has been
+ * finished yet.
+ */
+float
+audio_output_all_get_elapsed_time(void);
+
+#endif