output_*: convert to C++

test/run_output.cxx

@@ -0,0 +1,257 @@
+/*
+ * 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 "OutputControl.hxx"
+
+extern "C" {
+#include "output_plugin.h"
+#include "output_internal.h"
+#include "io_thread.h"
+#include "conf.h"
+#include "audio_parser.h"
+#include "filter_registry.h"
+#include "pcm_convert.h"
+#include "event_pipe.h"
+#include "idle.h"
+}
+
+#include "playlist.h"
+#include "player_control.h"
+#include "stdbin.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+struct playlist g_playlist;
+
+void
+idle_add(G_GNUC_UNUSED unsigned flags)
+{
+}
+
+void
+event_pipe_emit(G_GNUC_UNUSED enum pipe_event event)
+{
+}
+
+void pcm_convert_init(G_GNUC_UNUSED struct pcm_convert_state *state)
+{
+}
+
+void pcm_convert_deinit(G_GNUC_UNUSED struct pcm_convert_state *state)
+{
+}
+
+const void *
+pcm_convert(G_GNUC_UNUSED struct pcm_convert_state *state,
+	    G_GNUC_UNUSED const struct audio_format *src_format,
+	    G_GNUC_UNUSED const void *src, G_GNUC_UNUSED size_t src_size,
+	    G_GNUC_UNUSED const struct audio_format *dest_format,
+	    G_GNUC_UNUSED size_t *dest_size_r,
+	    GError **error_r)
+{
+	g_set_error(error_r, pcm_convert_quark(), 0,
+		    "Not implemented");
+	return NULL;
+}
+
+const struct filter_plugin *
+filter_plugin_by_name(G_GNUC_UNUSED const char *name)
+{
+	assert(false);
+	return NULL;
+}
+
+static const struct config_param *
+find_named_config_block(const char *block, const char *name)
+{
+	const struct config_param *param = NULL;
+
+	while ((param = config_get_next_param(block, param)) != NULL) {
+		const char *current_name =
+			config_get_block_string(param, "name", NULL);
+		if (current_name != NULL && strcmp(current_name, name) == 0)
+			return param;
+	}
+
+	return NULL;
+}
+
+static struct audio_output *
+load_audio_output(const char *name)
+{
+	const struct config_param *param;
+	GError *error = NULL;
+
+	param = find_named_config_block(CONF_AUDIO_OUTPUT, name);
+	if (param == NULL) {
+		g_printerr("No such configured audio output: %s\n", name);
+		return nullptr;
+	}
+
+	static struct player_control dummy_player_control;
+
+	struct audio_output *ao =
+		audio_output_new(param, &dummy_player_control, &error);
+	if (ao == NULL) {
+		g_printerr("%s\n", error->message);
+		g_error_free(error);
+	}
+
+	return ao;
+}
+
+static bool
+run_output(struct audio_output *ao, struct audio_format *audio_format)
+{
+	/* open the audio output */
+
+	GError *error = NULL;
+	if (!ao_plugin_enable(ao, &error)) {
+		g_printerr("Failed to enable audio output: %s\n",
+			   error->message);
+		g_error_free(error);
+		return false;
+	}
+
+	if (!ao_plugin_open(ao, audio_format, &error)) {
+		ao_plugin_disable(ao);
+		g_printerr("Failed to open audio output: %s\n",
+			   error->message);
+		g_error_free(error);
+		return false;
+	}
+
+	struct audio_format_string af_string;
+	g_printerr("audio_format=%s\n",
+		   audio_format_to_string(audio_format, &af_string));
+
+	size_t frame_size = audio_format_frame_size(audio_format);
+
+	/* play */
+
+	size_t length = 0;
+	char buffer[4096];
+	while (true) {
+		if (length < sizeof(buffer)) {
+			ssize_t nbytes = read(0, buffer + length,
+					      sizeof(buffer) - length);
+			if (nbytes <= 0)
+				break;
+
+			length += (size_t)nbytes;
+		}
+
+		size_t play_length = (length / frame_size) * frame_size;
+		if (play_length > 0) {
+			size_t consumed = ao_plugin_play(ao,
+							 buffer, play_length,
+							 &error);
+			if (consumed == 0) {
+				ao_plugin_close(ao);
+				ao_plugin_disable(ao);
+				g_printerr("Failed to play: %s\n",
+					   error->message);
+				g_error_free(error);
+				return false;
+			}
+
+			assert(consumed <= length);
+			assert(consumed % frame_size == 0);
+
+			length -= consumed;
+			memmove(buffer, buffer + consumed, length);
+		}
+	}
+
+	ao_plugin_close(ao);
+	ao_plugin_disable(ao);
+	return true;
+}
+
+int main(int argc, char **argv)
+{
+	struct audio_format audio_format;
+	bool success;
+	GError *error = NULL;
+
+	if (argc < 3 || argc > 4) {
+		g_printerr("Usage: run_output CONFIG NAME [FORMAT] <IN\n");
+		return 1;
+	}
+
+	audio_format_init(&audio_format, 44100, SAMPLE_FORMAT_S16, 2);
+
+	g_thread_init(NULL);
+
+	/* read configuration file (mpd.conf) */
+
+	config_global_init();
+	success = config_read_file(argv[1], &error);
+	if (!success) {
+		g_printerr("%s:", error->message);
+		g_error_free(error);
+		return 1;
+	}
+
+	io_thread_init();
+	if (!io_thread_start(&error)) {
+		g_warning("%s", error->message);
+		g_error_free(error);
+		return EXIT_FAILURE;
+	}
+
+	/* initialize the audio output */
+
+	struct audio_output *ao = load_audio_output(argv[2]);
+	if (ao == NULL)
+		return 1;
+
+	/* parse the audio format */
+
+	if (argc > 3) {
+		success = audio_format_parse(&audio_format, argv[3],
+					     false, &error);
+		if (!success) {
+			g_printerr("Failed to parse audio format: %s\n",
+				   error->message);
+			g_error_free(error);
+			return 1;
+		}
+	}
+
+	/* do it */
+
+	success = run_output(ao, &audio_format);
+
+	/* cleanup and exit */
+
+	audio_output_free(ao);
+
+	io_thread_deinit();
+
+	config_global_finish();
+
+	return success ? EXIT_SUCCESS : EXIT_FAILURE;
+}