test/run_encoder, ...: convert to C++

test/run_convert.cxx

@@ -0,0 +1,127 @@
+/*
+ * 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.
+ */
+
+/*
+ * This program is a command line interface to MPD's PCM conversion
+ * library (pcm_convert.c).
+ *
+ */
+
+#include "config.h"
+#include "audio_parser.h"
+#include "audio_format.h"
+#include "pcm_convert.h"
+#include "conf.h"
+#include "util/fifo_buffer.h"
+#include "stdbin.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <stddef.h>
+#include <unistd.h>
+
+static void
+my_log_func(const gchar *log_domain, G_GNUC_UNUSED GLogLevelFlags log_level,
+	    const gchar *message, G_GNUC_UNUSED gpointer user_data)
+{
+	if (log_domain != NULL)
+		g_printerr("%s: %s\n", log_domain, message);
+	else
+		g_printerr("%s\n", message);
+}
+
+const char *
+config_get_string(gcc_unused enum ConfigOption option,
+		  const char *default_value)
+{
+	return default_value;
+}
+
+int main(int argc, char **argv)
+{
+	GError *error = NULL;
+	struct audio_format in_audio_format, out_audio_format;
+	struct pcm_convert_state state;
+	const void *output;
+	ssize_t nbytes;
+	size_t length;
+
+	if (argc != 3) {
+		g_printerr("Usage: run_convert IN_FORMAT OUT_FORMAT <IN >OUT\n");
+		return 1;
+	}
+
+	g_log_set_default_handler(my_log_func, NULL);
+
+	if (!audio_format_parse(&in_audio_format, argv[1],
+				false, &error)) {
+		g_printerr("Failed to parse audio format: %s\n",
+			   error->message);
+		return 1;
+	}
+
+	struct audio_format out_audio_format_mask;
+	if (!audio_format_parse(&out_audio_format_mask, argv[2],
+				true, &error)) {
+		g_printerr("Failed to parse audio format: %s\n",
+			   error->message);
+		return 1;
+	}
+
+	out_audio_format = in_audio_format;
+	audio_format_mask_apply(&out_audio_format, &out_audio_format_mask);
+
+	const size_t in_frame_size = audio_format_frame_size(&in_audio_format);
+
+	pcm_convert_init(&state);
+
+	struct fifo_buffer *buffer = fifo_buffer_new(4096);
+
+	while (true) {
+		void *p = fifo_buffer_write(buffer, &length);
+		assert(p != NULL);
+
+		nbytes = read(0, p, length);
+		if (nbytes <= 0)
+			break;
+
+		fifo_buffer_append(buffer, nbytes);
+
+		const void *src = fifo_buffer_read(buffer, &length);
+		assert(src != NULL);
+
+		length -= length % in_frame_size;
+		if (length == 0)
+			continue;
+
+		fifo_buffer_consume(buffer, length);
+
+		output = pcm_convert(&state, &in_audio_format, src, length,
+				     &out_audio_format, &length, &error);
+		if (output == NULL) {
+			g_printerr("Failed to convert: %s\n", error->message);
+			return 2;
+		}
+
+		G_GNUC_UNUSED ssize_t ignored = write(1, output, length);
+	}
+
+	pcm_convert_deinit(&state);
+}