From a9ce0218c1879a752c9d9ec6ef21fcf44eab51ab Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Fri, 1 Feb 2013 18:40:36 +0100
Subject: FilterInternal: convert struct filter to a OO interface

---
 src/filter/NormalizeFilterPlugin.cxx | 69 +++++++++++++-----------------------
 1 file changed, 24 insertions(+), 45 deletions(-)

(limited to 'src/filter/NormalizeFilterPlugin.cxx')

diff --git a/src/filter/NormalizeFilterPlugin.cxx b/src/filter/NormalizeFilterPlugin.cxx
index af7a5efbd..e18c5cdf9 100644
--- a/src/filter/NormalizeFilterPlugin.cxx
+++ b/src/filter/NormalizeFilterPlugin.cxx
@@ -28,68 +28,51 @@
 #include <assert.h>
 #include <string.h>
 
-struct normalize_filter {
-	struct filter filter;
-
+class NormalizeFilter final : public Filter {
 	struct Compressor *compressor;
 
 	struct pcm_buffer buffer;
+
+public:
+	virtual const audio_format *Open(audio_format &af, GError **error_r);
+	virtual void Close();
+	virtual const void *FilterPCM(const void *src, size_t src_size,
+				      size_t *dest_size_r, GError **error_r);
 };
 
-static struct filter *
+static Filter *
 normalize_filter_init(gcc_unused const struct config_param *param,
 		      gcc_unused GError **error_r)
 {
-	struct normalize_filter *filter = g_new(struct normalize_filter, 1);
-
-	filter_init(&filter->filter, &normalize_filter_plugin);
-
-	return &filter->filter;
+	return new NormalizeFilter();
 }
 
-static void
-normalize_filter_finish(struct filter *filter)
+const struct audio_format *
+NormalizeFilter::Open(audio_format &audio_format, gcc_unused GError **error_r)
 {
-	g_free(filter);
-}
+	audio_format.format = SAMPLE_FORMAT_S16;
 
-static const struct audio_format *
-normalize_filter_open(struct filter *_filter,
-		      struct audio_format *audio_format,
-		      gcc_unused GError **error_r)
-{
-	struct normalize_filter *filter = (struct normalize_filter *)_filter;
+	compressor = Compressor_new(0);
+	pcm_buffer_init(&buffer);
 
-	audio_format->format = SAMPLE_FORMAT_S16;
-
-	filter->compressor = Compressor_new(0);
-
-	pcm_buffer_init(&filter->buffer);
-
-	return audio_format;
+	return &audio_format;
 }
 
-static void
-normalize_filter_close(struct filter *_filter)
+void
+NormalizeFilter::Close()
 {
-	struct normalize_filter *filter = (struct normalize_filter *)_filter;
-
-	pcm_buffer_deinit(&filter->buffer);
-	Compressor_delete(filter->compressor);
+	pcm_buffer_deinit(&buffer);
+	Compressor_delete(compressor);
 }
 
-static const void *
-normalize_filter_filter(struct filter *_filter,
-			const void *src, size_t src_size, size_t *dest_size_r,
-			gcc_unused GError **error_r)
+const void *
+NormalizeFilter::FilterPCM(const void *src, size_t src_size,
+			   size_t *dest_size_r, gcc_unused GError **error_r)
 {
-	struct normalize_filter *filter = (struct normalize_filter *)_filter;
-
-	int16_t *dest = (int16_t *)pcm_buffer_get(&filter->buffer, src_size);
-
+	int16_t *dest = (int16_t *)pcm_buffer_get(&buffer, src_size);
 	memcpy(dest, src, src_size);
 
-	Compressor_Process_int16(filter->compressor, dest, src_size / 2);
+	Compressor_Process_int16(compressor, dest, src_size / 2);
 
 	*dest_size_r = src_size;
 	return dest;
@@ -98,8 +81,4 @@ normalize_filter_filter(struct filter *_filter,
 const struct filter_plugin normalize_filter_plugin = {
 	"normalize",
 	normalize_filter_init,
-	normalize_filter_finish,
-	normalize_filter_open,
-	normalize_filter_close,
-	normalize_filter_filter,
 };
-- 
cgit v1.2.3