output/recorder: convert to C++

2 files changed, 86 insertions, 62 deletions

diff --git a/src/output/recorder_output_plugin.c b/src/output/RecorderOutputPlugin.cxx
index b84cb244c..8b821d773 100644
--- a/src/output/recorder_output_plugin.c
+++ b/src/output/RecorderOutputPlugin.cxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2011 The Music Player Daemon Project
+ * 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
@@ -18,7 +18,7 @@
  */
 
 #include "config.h"
-#include "recorder_output_plugin.h"
+#include "RecorderOutputPlugin.hxx"
 #include "output_api.h"
 #include "encoder_plugin.h"
 #include "encoder_list.h"
@@ -34,7 +34,7 @@
 #undef G_LOG_DOMAIN
 #define G_LOG_DOMAIN "recorder"
 
-struct recorder_output {
+struct RecorderOutput {
 	struct audio_output base;
 
 	/**
@@ -56,6 +56,24 @@ struct recorder_output {
 	 * The buffer for encoder_read().
 	 */
 	char buffer[32768];
+
+	bool Initialize(const config_param *param, GError **error_r) {
+		return ao_base_init(&base, &recorder_output_plugin, param,
+				    error_r);
+	}
+
+	void Deinitialize() {
+		ao_base_finish(&base);
+	}
+
+	bool Configure(const config_param *param, GError **error_r);
+
+	bool WriteToFile(const void *data, size_t length, GError **error_r);
+
+	/**
+	 * Writes pending data from the encoder to the output file.
+	 */
+	bool EncoderToFile(GError **error_r);
 };
 
 /**
@@ -67,68 +85,71 @@ recorder_output_quark(void)
 	return g_quark_from_static_string("recorder_output");
 }
 
-static struct audio_output *
-recorder_output_init(const struct config_param *param, GError **error_r)
+inline bool
+RecorderOutput::Configure(const config_param *param, GError **error_r)
 {
-	struct recorder_output *recorder = g_new(struct recorder_output, 1);
-	if (!ao_base_init(&recorder->base, &recorder_output_plugin, param,
-			  error_r)) {
-		g_free(recorder);
-		return NULL;
-	}
-
 	/* read configuration */
 
 	const char *encoder_name =
 		config_get_block_string(param, "encoder", "vorbis");
 	const struct encoder_plugin *encoder_plugin =
 		encoder_plugin_get(encoder_name);
-	if (encoder_plugin == NULL) {
+	if (encoder_plugin == nullptr) {
 		g_set_error(error_r, recorder_output_quark(), 0,
 			    "No such encoder: %s", encoder_name);
-		goto failure;
+		return false;
 	}
 
-	recorder->path = config_get_block_string(param, "path", NULL);
-	if (recorder->path == NULL) {
+	path = config_get_block_string(param, "path", nullptr);
+	if (path == nullptr) {
 		g_set_error(error_r, recorder_output_quark(), 0,
 			    "'path' not configured");
-		goto failure;
+		return false;
 	}
 
 	/* initialize encoder */
 
-	recorder->encoder = encoder_init(encoder_plugin, param, error_r);
-	if (recorder->encoder == NULL)
-		goto failure;
+	encoder = encoder_init(encoder_plugin, param, error_r);
+	if (encoder == nullptr)
+		return false;
 
-	return &recorder->base;
+	return true;
+}
+
+static audio_output *
+recorder_output_init(const config_param *param, GError **error_r)
+{
+	RecorderOutput *recorder = new RecorderOutput();
+
+	if (!recorder->Initialize(param, error_r)) {
+		delete recorder;
+		return nullptr;
+	}
+
+	if (!recorder->Configure(param, error_r)) {
+		recorder->Deinitialize();
+		delete recorder;
+		return nullptr;
+	}
 
-failure:
-	ao_base_finish(&recorder->base);
-	g_free(recorder);
-	return NULL;
+	return &recorder->base;
 }
 
 static void
 recorder_output_finish(struct audio_output *ao)
 {
-	struct recorder_output *recorder = (struct recorder_output *)ao;
+	RecorderOutput *recorder = (RecorderOutput *)ao;
 
 	encoder_finish(recorder->encoder);
-	ao_base_finish(&recorder->base);
-	g_free(recorder);
+	recorder->Deinitialize();
+	delete recorder;
 }
 
-static bool
-recorder_write_to_file(struct recorder_output *recorder,
-		       const void *_data, size_t length,
-		       GError **error_r)
+inline bool
+RecorderOutput::WriteToFile(const void *_data, size_t length, GError **error_r)
 {
 	assert(length > 0);
 
-	const int fd = recorder->fd;
-
 	const uint8_t *data = (const uint8_t *)_data, *end = data + length;
 
 	while (true) {
@@ -145,33 +166,27 @@ recorder_write_to_file(struct recorder_output *recorder,
 		} else if (errno != EINTR) {
 			g_set_error(error_r, recorder_output_quark(), 0,
 				    "Failed to write to '%s': %s",
-				    recorder->path, g_strerror(errno));
+				    path, g_strerror(errno));
 			return false;
 		}
 	}
 }
 
-/**
- * Writes pending data from the encoder to the output file.
- */
-static bool
-recorder_output_encoder_to_file(struct recorder_output *recorder,
-				GError **error_r)
+inline bool
+RecorderOutput::EncoderToFile(GError **error_r)
 {
-	assert(recorder->fd >= 0);
+	assert(fd >= 0);
 
 	while (true) {
 		/* read from the encoder */
 
-		size_t size = encoder_read(recorder->encoder, recorder->buffer,
-					   sizeof(recorder->buffer));
+		size_t size = encoder_read(encoder, buffer, sizeof(buffer));
 		if (size == 0)
 			return true;
 
 		/* write everything into the file */
 
-		if (!recorder_write_to_file(recorder, recorder->buffer, size,
-					    error_r))
+		if (!WriteToFile(buffer, size, error_r))
 			return false;
 	}
 }
@@ -181,7 +196,7 @@ recorder_output_open(struct audio_output *ao,
 		     struct audio_format *audio_format,
 		     GError **error_r)
 {
-	struct recorder_output *recorder = (struct recorder_output *)ao;
+	RecorderOutput *recorder = (RecorderOutput *)ao;
 
 	/* create the output file */
 
@@ -203,7 +218,7 @@ recorder_output_open(struct audio_output *ao,
 		return false;
 	}
 
-	if (!recorder_output_encoder_to_file(recorder, error_r)) {
+	if (!recorder->EncoderToFile(error_r)) {
 		encoder_close(recorder->encoder);
 		close(recorder->fd);
 		unlink(recorder->path);
@@ -216,12 +231,12 @@ recorder_output_open(struct audio_output *ao,
 static void
 recorder_output_close(struct audio_output *ao)
 {
-	struct recorder_output *recorder = (struct recorder_output *)ao;
+	RecorderOutput *recorder = (RecorderOutput *)ao;
 
 	/* flush the encoder and write the rest to the file */
 
-	if (encoder_end(recorder->encoder, NULL))
-		recorder_output_encoder_to_file(recorder, NULL);
+	if (encoder_end(recorder->encoder, nullptr))
+		recorder->EncoderToFile(nullptr);
 
 	/* now really close everything */
 
@@ -234,18 +249,27 @@ static size_t
 recorder_output_play(struct audio_output *ao, const void *chunk, size_t size,
 		     GError **error_r)
 {
-	struct recorder_output *recorder = (struct recorder_output *)ao;
+	RecorderOutput *recorder = (RecorderOutput *)ao;
 
 	return encoder_write(recorder->encoder, chunk, size, error_r) &&
-		recorder_output_encoder_to_file(recorder, error_r)
+		recorder->EncoderToFile(error_r)
 		? size : 0;
 }
 
 const struct audio_output_plugin recorder_output_plugin = {
-	.name = "recorder",
-	.init = recorder_output_init,
-	.finish = recorder_output_finish,
-	.open = recorder_output_open,
-	.close = recorder_output_close,
-	.play = recorder_output_play,
+	"recorder",
+	nullptr,
+	recorder_output_init,
+	recorder_output_finish,
+	nullptr,
+	nullptr,
+	recorder_output_open,
+	recorder_output_close,
+	nullptr,
+	nullptr,
+	recorder_output_play,
+	nullptr,
+	nullptr,
+	nullptr,
+	nullptr,
 };
diff --git a/src/output/recorder_output_plugin.h b/src/output/RecorderOutputPlugin.hxx
index a9bf755bd..a27f51e23 100644
--- a/src/output/recorder_output_plugin.h
+++ b/src/output/RecorderOutputPlugin.hxx
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2003-2011 The Music Player Daemon Project
+ * 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
@@ -17,8 +17,8 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
-#ifndef MPD_RECORDER_OUTPUT_PLUGIN_H
-#define MPD_RECORDER_OUTPUT_PLUGIN_H
+#ifndef MPD_RECORDER_OUTPUT_PLUGIN_HXX
+#define MPD_RECORDER_OUTPUT_PLUGIN_HXX
 
 extern const struct audio_output_plugin recorder_output_plugin;