AudioOutput: pass plugin to constructor

Make it "const".

src/output/Init.cxx

@@ -46,8 +46,9 @@
 #define AUDIO_OUTPUT_FORMAT	"format"
 #define AUDIO_FILTERS		"filters"
 
-AudioOutput::AudioOutput()
+AudioOutput::AudioOutput(const AudioOutputPlugin &_plugin)
-	:enabled(true), really_enabled(false),
+	:plugin(&_plugin),
+	 enabled(true), really_enabled(false),
 	 open(false),
 	 pause(false),
 	 allow_play(true),
@@ -58,6 +59,10 @@ AudioOutput::AudioOutput()
 	 other_replay_gain_filter(nullptr),
 	 command(AO_COMMAND_NONE)
 {
+	assert(plugin->finish != nullptr);
+	assert(plugin->open != nullptr);
+	assert(plugin->close != nullptr);
+	assert(plugin->play != nullptr);
 }
 
 static const AudioOutputPlugin *
@@ -143,15 +148,9 @@ audio_output_load_mixer(AudioOutput *ao,
 
 bool
 ao_base_init(AudioOutput *ao,
-	     const AudioOutputPlugin *plugin,
 	     const config_param &param, Error &error)
 {
 	assert(ao != nullptr);
-	assert(plugin != nullptr);
-	assert(plugin->finish != nullptr);
-	assert(plugin->open != nullptr);
-	assert(plugin->close != nullptr);
-	assert(plugin->play != nullptr);
 
 	if (!param.IsNull()) {
 		ao->name = param.GetBlockValue(AUDIO_OUTPUT_NAME);
@@ -176,7 +175,6 @@ ao_base_init(AudioOutput *ao,
 		ao->config_audio_format.Clear();
 	}
 
-	ao->plugin = plugin;
 	ao->tags = param.GetBlockValue("tags", true);
 	ao->always_on = param.GetBlockValue("always_on", false);
 	ao->enabled = param.GetBlockValue("enabled", true);

src/output/Internal.hxx

@@ -69,7 +69,7 @@ struct AudioOutput {
 	/**
 	 * The plugin which implements this output device.
 	 */
-	const AudioOutputPlugin *plugin;
+	const AudioOutputPlugin *const plugin;
 
 	/**
 	 * The #mixer object associated with this audio output device.
@@ -264,7 +264,7 @@ struct AudioOutput {
 	 */
 	bool chunk_finished;
 
-	AudioOutput();
+	AudioOutput(const AudioOutputPlugin &_plugin);
 	~AudioOutput();
 };
 
@@ -293,7 +293,6 @@ audio_output_new(const config_param &param,
 
 bool
 ao_base_init(AudioOutput *ao,
-	     const AudioOutputPlugin *plugin,
 	     const config_param &param, Error &error);
 
 void

src/output/plugins/AlsaOutputPlugin.cxx

@@ -119,12 +119,13 @@ struct AlsaOutput {
 	 */
 	uint8_t *silence;
 
-	AlsaOutput():mode(0), writei(snd_pcm_writei) {
+	AlsaOutput()
+		:base(alsa_output_plugin),
+		 mode(0), writei(snd_pcm_writei) {
 	}
 
 	bool Init(const config_param &param, Error &error) {
-		return ao_base_init(&base, &alsa_output_plugin,
+		return ao_base_init(&base, param, error);
-				    param, error);
 	}
 };
 

src/output/plugins/AoOutputPlugin.cxx

@@ -42,9 +42,11 @@ struct AoOutput {
 	ao_option *options;
 	ao_device *device;
 
+	AoOutput()
+		:base(ao_output_plugin) {}
+
 	bool Initialize(const config_param &param, Error &error) {
-		return ao_base_init(&base, &ao_output_plugin, param,
+		return ao_base_init(&base, param, error);
-				    error);
 	}
 
 	bool Configure(const config_param &param, Error &error);

src/output/plugins/FifoOutputPlugin.cxx

@@ -47,12 +47,12 @@ struct FifoOutput {
 	Timer *timer;
 
 	FifoOutput()
-		:path(AllocatedPath::Null()), input(-1), output(-1),
+		:base(fifo_output_plugin),
+		 path(AllocatedPath::Null()), input(-1), output(-1),
 		 created(false) {}
 
 	bool Initialize(const config_param &param, Error &error) {
-		return ao_base_init(&base, &fifo_output_plugin, param,
+		return ao_base_init(&base, param, error);
-				    error);
 	}
 
 	bool Create(Error &error);

src/output/plugins/HttpdOutputPlugin.cxx

@@ -51,6 +51,7 @@ const Domain httpd_output_domain("httpd_output");
 inline
 HttpdOutput::HttpdOutput(EventLoop &_loop)
 	:ServerSocket(_loop), DeferredMonitor(_loop),
+	 base(httpd_output_plugin),
 	 encoder(nullptr), unflushed_input(0),
 	 metadata(nullptr)
 {
@@ -136,7 +137,7 @@ HttpdOutput::Configure(const config_param &param, Error &error)
 inline bool
 HttpdOutput::Init(const config_param &param, Error &error)
 {
-	return ao_base_init(&base, &httpd_output_plugin, param, error);
+	return ao_base_init(&base, param, error);
 }
 
 static AudioOutput *

src/output/plugins/JackOutputPlugin.cxx

@@ -79,9 +79,11 @@ struct JackOutput {
 	 */
 	bool pause;
 
+	JackOutput()
+		:base(jack_output_plugin) {}
+
 	bool Initialize(const config_param &param, Error &error_r) {
-		return ao_base_init(&base, &jack_output_plugin, param,
+		return ao_base_init(&base, param, error_r);
-				    error_r);
 	}
 };
 

src/output/plugins/NullOutputPlugin.cxx

@@ -29,9 +29,11 @@ struct NullOutput {
 
 	Timer *timer;
 
+	NullOutput()
+		:base(null_output_plugin) {}
+
 	bool Initialize(const config_param &param, Error &error) {
-		return ao_base_init(&base, &null_output_plugin, param,
+		return ao_base_init(&base, param, error);
-				    error);
 	}
 };
 

src/output/plugins/OSXOutputPlugin.cxx

@@ -45,6 +45,9 @@ struct OSXOutput {
 	Cond condition;
 
 	DynamicFifoBuffer<uint8_t> *buffer;
+
+	OSXOutput()
+		:base(osx_output_plugin) {}
 };
 
 static constexpr Domain osx_output_domain("osx_output");
@@ -81,7 +84,7 @@ static AudioOutput *
 osx_output_init(const config_param &param, Error &error)
 {
 	OSXOutput *oo = new OSXOutput();
-	if (!ao_base_init(&oo->base, &osx_output_plugin, param, error)) {
+	if (!ao_base_init(&oo->base, param, error)) {
 		delete oo;
 		return NULL;
 	}

src/output/plugins/OpenALOutputPlugin.cxx

@@ -48,9 +48,11 @@ struct OpenALOutput {
 	ALenum format;
 	ALuint frequency;
 
+	OpenALOutput()
+		:base(openal_output_plugin) {}
+
 	bool Initialize(const config_param &param, Error &error_r) {
-		return ao_base_init(&base, &openal_output_plugin, param,
+		return ao_base_init(&base, param, error_r);
-				    error_r);
 	}
 };
 

src/output/plugins/OssOutputPlugin.cxx

@@ -78,11 +78,12 @@ struct OssOutput {
 	 */
 	int oss_format;
 
-	OssOutput():fd(-1), device(nullptr) {}
+	OssOutput()
+		:base(oss_output_plugin),
+		 fd(-1), device(nullptr) {}
 
 	bool Initialize(const config_param &param, Error &error_r) {
-		return ao_base_init(&base, &oss_output_plugin, param,
+		return ao_base_init(&base, param, error_r);
-				    error_r);
 	}
 };
 

src/output/plugins/PipeOutputPlugin.cxx

@@ -34,9 +34,11 @@ struct PipeOutput {
 	std::string cmd;
 	FILE *fh;
 
+	PipeOutput()
+		:base(pipe_output_plugin) {}
+
 	bool Initialize(const config_param &param, Error &error) {
-		return ao_base_init(&base, &pipe_output_plugin, param,
+		return ao_base_init(&base, param, error);
-				    error);
 	}
 
 	bool Configure(const config_param &param, Error &error);

src/output/plugins/PulseOutputPlugin.cxx

@@ -55,6 +55,9 @@ struct PulseOutput {
 	struct pa_stream *stream;
 
 	size_t writable;
+
+	PulseOutput()
+		:base(pulse_output_plugin) {}
 };
 
 static constexpr Domain pulse_output_domain("pulse_output");
@@ -331,7 +334,7 @@ pulse_output_init(const config_param &param, Error &error)
 	g_setenv("PULSE_PROP_media.role", "music", true);
 
 	po = new PulseOutput();
-	if (!ao_base_init(&po->base, &pulse_output_plugin, param, error)) {
+	if (!ao_base_init(&po->base, param, error)) {
 		delete po;
 		return nullptr;
 	}

src/output/plugins/RecorderOutputPlugin.cxx

@@ -57,9 +57,11 @@ struct RecorderOutput {
 	 */
 	char buffer[32768];
 
+	RecorderOutput()
+		:base(recorder_output_plugin) {}
+
 	bool Initialize(const config_param &param, Error &error_r) {
-		return ao_base_init(&base, &recorder_output_plugin, param,
+		return ao_base_init(&base, param, error_r);
-				    error_r);
 	}
 
 	bool Configure(const config_param &param, Error &error);

src/output/plugins/RoarOutputPlugin.cxx

@@ -50,15 +50,15 @@ class RoarOutput {
 
 public:
 	RoarOutput()
-		:err(ROAR_ERROR_NONE) {}
+		:base(roar_output_plugin),
+		 err(ROAR_ERROR_NONE) {}
 
 	operator AudioOutput *() {
 		return &base;
 	}
 
 	bool Initialize(const config_param &param, Error &error) {
-		return ao_base_init(&base, &roar_output_plugin, param,
+		return ao_base_init(&base, param, error);
-				    error);
 	}
 
 	void Configure(const config_param &param);

src/output/plugins/ShoutOutputPlugin.cxx

@@ -54,7 +54,8 @@ struct ShoutOutput final {
 	uint8_t buffer[32768];
 
 	ShoutOutput()
-		:shout_conn(shout_new()),
+		:base(shout_output_plugin),
+		 shout_conn(shout_new()),
 		shout_meta(shout_metadata_new()),
 		quality(-2.0),
 		bitrate(-1),
@@ -68,8 +69,7 @@ struct ShoutOutput final {
 	}
 
 	bool Initialize(const config_param &param, Error &error) {
-		return ao_base_init(&base, &shout_output_plugin, param,
+		return ao_base_init(&base, param, error);
-				    error);
 	}
 
 	bool Configure(const config_param &param, Error &error);

src/output/plugins/SolarisOutputPlugin.cxx

@@ -57,9 +57,11 @@ struct SolarisOutput {
 
 	int fd;
 
+	SolarisOutput()
+		:base(solaris_output_plugin) {}
+
 	bool Initialize(const config_param &param, Error &error_r) {
-		return ao_base_init(&base, &solaris_output_plugin, param,
+		return ao_base_init(&base, param, error_r);
-				    error_r);
 	}
 };
 

src/output/plugins/WinmmOutputPlugin.cxx

@@ -51,6 +51,9 @@ struct WinmmOutput {
 
 	WinmmBuffer buffers[8];
 	unsigned next_buffer;
+
+	WinmmBuffer()
+		:base(winmm_output_plugin) {}
 };
 
 static constexpr Domain winmm_output_domain("winmm_output");
@@ -112,7 +115,7 @@ static AudioOutput *
 winmm_output_init(const config_param &param, Error &error)
 {
 	WinmmOutput *wo = new WinmmOutput();
-	if (!ao_base_init(&wo->base, &winmm_output_plugin, param, error)) {
+	if (!ao_base_init(&wo->base, param, error)) {
 		delete wo;
 		return nullptr;
 	}