decoder_*: convert to C++

src/DecoderControl.cxx

@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2003-2013 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.
+ */
+
+#include "config.h"
+#include "DecoderControl.hxx"
+#include "song.h"
+
+extern "C" {
+#include "pipe.h"
+}
+
+#include <assert.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "decoder_control"
+
+struct decoder_control *
+dc_new(GCond *client_cond)
+{
+	struct decoder_control *dc = g_new(struct decoder_control, 1);
+
+	dc->thread = NULL;
+
+	dc->mutex = g_mutex_new();
+	dc->cond = g_cond_new();
+	dc->client_cond = client_cond;
+
+	dc->state = DECODE_STATE_STOP;
+	dc->command = DECODE_COMMAND_NONE;
+
+	dc->song = NULL;
+
+	dc->replay_gain_db = 0;
+	dc->replay_gain_prev_db = 0;
+	dc->mixramp_start = NULL;
+	dc->mixramp_end = NULL;
+	dc->mixramp_prev_end = NULL;
+
+	return dc;
+}
+
+void
+dc_free(struct decoder_control *dc)
+{
+	dc_clear_error(dc);
+
+	if (dc->song != NULL)
+		song_free(dc->song);
+
+	g_cond_free(dc->cond);
+	g_mutex_free(dc->mutex);
+	g_free(dc->mixramp_start);
+	g_free(dc->mixramp_end);
+	g_free(dc->mixramp_prev_end);
+	g_free(dc);
+}
+
+static void
+dc_command_wait_locked(struct decoder_control *dc)
+{
+	while (dc->command != DECODE_COMMAND_NONE)
+		g_cond_wait(dc->client_cond, dc->mutex);
+}
+
+static void
+dc_command_locked(struct decoder_control *dc, enum decoder_command cmd)
+{
+	dc->command = cmd;
+	decoder_signal(dc);
+	dc_command_wait_locked(dc);
+}
+
+static void
+dc_command(struct decoder_control *dc, enum decoder_command cmd)
+{
+	decoder_lock(dc);
+	dc_clear_error(dc);
+	dc_command_locked(dc, cmd);
+	decoder_unlock(dc);
+}
+
+static void
+dc_command_async(struct decoder_control *dc, enum decoder_command cmd)
+{
+	decoder_lock(dc);
+
+	dc->command = cmd;
+	decoder_signal(dc);
+
+	decoder_unlock(dc);
+}
+
+bool
+decoder_is_current_song(const struct decoder_control *dc,
+			const struct song *song)
+{
+	assert(dc != NULL);
+	assert(song != NULL);
+
+	switch (dc->state) {
+	case DECODE_STATE_STOP:
+	case DECODE_STATE_ERROR:
+		return false;
+
+	case DECODE_STATE_START:
+	case DECODE_STATE_DECODE:
+		return song_equals(dc->song, song);
+	}
+
+	assert(false);
+	return false;
+}
+
+void
+dc_start(struct decoder_control *dc, struct song *song,
+	 unsigned start_ms, unsigned end_ms,
+	 struct music_buffer *buffer, struct music_pipe *pipe)
+{
+	assert(song != NULL);
+	assert(buffer != NULL);
+	assert(pipe != NULL);
+	assert(music_pipe_empty(pipe));
+
+	if (dc->song != NULL)
+		song_free(dc->song);
+
+	dc->song = song;
+	dc->start_ms = start_ms;
+	dc->end_ms = end_ms;
+	dc->buffer = buffer;
+	dc->pipe = pipe;
+	dc_command(dc, DECODE_COMMAND_START);
+}
+
+void
+dc_stop(struct decoder_control *dc)
+{
+	decoder_lock(dc);
+
+	if (dc->command != DECODE_COMMAND_NONE)
+		/* Attempt to cancel the current command.  If it's too
+		   late and the decoder thread is already executing
+		   the old command, we'll call STOP again in this
+		   function (see below). */
+		dc_command_locked(dc, DECODE_COMMAND_STOP);
+
+	if (dc->state != DECODE_STATE_STOP && dc->state != DECODE_STATE_ERROR)
+		dc_command_locked(dc, DECODE_COMMAND_STOP);
+
+	decoder_unlock(dc);
+}
+
+bool
+dc_seek(struct decoder_control *dc, double where)
+{
+	assert(dc->state != DECODE_STATE_START);
+	assert(where >= 0.0);
+
+	if (dc->state == DECODE_STATE_STOP ||
+	    dc->state == DECODE_STATE_ERROR || !dc->seekable)
+		return false;
+
+	dc->seek_where = where;
+	dc->seek_error = false;
+	dc_command(dc, DECODE_COMMAND_SEEK);
+
+	if (dc->seek_error)
+		return false;
+
+	return true;
+}
+
+void
+dc_quit(struct decoder_control *dc)
+{
+	assert(dc->thread != NULL);
+
+	dc->quit = true;
+	dc_command_async(dc, DECODE_COMMAND_STOP);
+
+	g_thread_join(dc->thread);
+	dc->thread = NULL;
+}
+
+void
+dc_mixramp_start(struct decoder_control *dc, char *mixramp_start)
+{
+	assert(dc != NULL);
+
+	g_free(dc->mixramp_start);
+	dc->mixramp_start = mixramp_start;
+}
+
+void
+dc_mixramp_end(struct decoder_control *dc, char *mixramp_end)
+{
+	assert(dc != NULL);
+
+	g_free(dc->mixramp_end);
+	dc->mixramp_end = mixramp_end;
+}
+
+void
+dc_mixramp_prev_end(struct decoder_control *dc, char *mixramp_prev_end)
+{
+	assert(dc != NULL);
+
+	g_free(dc->mixramp_prev_end);
+	dc->mixramp_prev_end = mixramp_prev_end;
+}