decoder_*: convert to C++

src/DecoderInternal.cxx

@@ -0,0 +1,100 @@
+/*
+ * 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 "DecoderInternal.hxx"
+#include "DecoderControl.hxx"
+
+extern "C" {
+#include "pipe.h"
+#include "buffer.h"
+}
+
+#include "input_stream.h"
+#include "chunk.h"
+
+#include <assert.h>
+
+/**
+ * All chunks are full of decoded data; wait for the player to free
+ * one.
+ */
+static enum decoder_command
+need_chunks(struct decoder_control *dc, bool do_wait)
+{
+	if (dc->command == DECODE_COMMAND_STOP ||
+	    dc->command == DECODE_COMMAND_SEEK)
+		return dc->command;
+
+	if (do_wait) {
+		decoder_wait(dc);
+		g_cond_signal(dc->client_cond);
+
+		return dc->command;
+	}
+
+	return DECODE_COMMAND_NONE;
+}
+
+struct music_chunk *
+decoder_get_chunk(struct decoder *decoder)
+{
+	struct decoder_control *dc = decoder->dc;
+	enum decoder_command cmd;
+
+	assert(decoder != NULL);
+
+	if (decoder->chunk != NULL)
+		return decoder->chunk;
+
+	do {
+		decoder->chunk = music_buffer_allocate(dc->buffer);
+		if (decoder->chunk != NULL) {
+			decoder->chunk->replay_gain_serial =
+				decoder->replay_gain_serial;
+			if (decoder->replay_gain_serial != 0)
+				decoder->chunk->replay_gain_info =
+					decoder->replay_gain_info;
+
+			return decoder->chunk;
+		}
+
+		decoder_lock(dc);
+		cmd = need_chunks(dc, true);
+		decoder_unlock(dc);
+	} while (cmd == DECODE_COMMAND_NONE);
+
+	return NULL;
+}
+
+void
+decoder_flush_chunk(struct decoder *decoder)
+{
+	struct decoder_control *dc = decoder->dc;
+
+	assert(decoder != NULL);
+	assert(decoder->chunk != NULL);
+
+	if (music_chunk_is_empty(decoder->chunk))
+		music_buffer_return(dc->buffer, decoder->chunk);
+	else
+		music_pipe_push(dc->pipe, decoder->chunk);
+
+	decoder->chunk = NULL;
+}