X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=filter.h;h=550c68d64c783113d7c99aa1e0a37fde564cd188;hp=2e1b01c38a7dc4cfec3336e6037f89398ea4f5e4;hb=cec9a9348c155e285eb94f024b263d52e1735301;hpb=a00372c21738c8782c68bc699ddc3b7cdaee4ad8

diff --git a/filter.h b/filter.h
index 2e1b01c3..550c68d6 100644
--- a/filter.h
+++ b/filter.h
@@ -1,13 +1,40 @@
 /*
- * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2008 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
 /** \file filter.h Filter-related structures and exported symbols from filter_chain.c. */
 
+
+/**
+ * Describes one running instance of a filter.
+*/
+struct filter_node {
+	/** The number in the array of available filters. */
+	unsigned filter_num;
+	/** The filter chain this filter node belongs to. */
+	struct filter_chain *fc;
+	/**
+	 * Each filter may store any filter-specific information about the particular
+	 * instance of the filter here.
+	 */
+	void *private_data;
+	/** The output buffer. */
+	char *buf;
+	/** The size of the output buffer. */
+	size_t bufsize;
+	/** The number of bytes currently loaded in \a buf. */
+	size_t loaded;
+	/** The list of registered callbacks. */
+	struct list_head callbacks;
+	/** A pointer to the configuration of this instance. */
+	void *conf;
+};
+
 /** Describes one running instance of a chain of filters */
 struct filter_chain {
+	unsigned int num_filters;
 	/**
 	 * The number of channels of the current stream.
 	 *
@@ -21,7 +48,7 @@ struct filter_chain {
 	 */
 	unsigned int samplerate;
 	/** The list containing all filter nodes in this filter chain. */
-	struct list_head filters;
+	struct filter_node *filter_nodes;
 	/**
 	 * The input buffer of the filter chain.
 	 *
@@ -40,8 +67,6 @@ struct filter_chain {
 	size_t *in_loaded;
 	/** Contains the number of bytes loaded in the output buffer. */
 	size_t *out_loaded;
-	/** Non-zero if this filter wont' produce any more output. */
-	int error;
 	/** Pointer to the error variable of the receiving application. */
 	int *input_error;
 	/** Pointer to the error variable of the writing application. */
@@ -50,37 +75,9 @@ struct filter_chain {
 	struct task task;
 };
 
-/**
- * Describes one running instance of a filter.
-*/
-struct filter_node {
-	/** A pointer to the corresponding filter struct. */
-	struct filter *filter;
-	/** The filter chain this filter node belongs to. */
-	struct filter_chain *fc;
-	/**
-	 * The position of the filter in the corresponding filter chain.
-	 *
-	 * All filters that make up the filter chains are organized in a doubly
-	 * linked list.
-	 */
-	struct list_head node;
-	/**
-	 * Each filter may store any filter-specific information about the particular
-	 * instance of the filter here.
-	 */
-	void *private_data;
-	/** The output buffer. */
-	char *buf;
-	/** The size of the output buffer. */
-	size_t bufsize;
-	/** The number of bytes currently loaded in \a buf. */
-	size_t loaded;
-	/** The list of registered callbacks. */
-	struct list_head callbacks;
-	/** A pointer to the configuration of this instance. */
-	void *conf;
-};
+#define FOR_EACH_FILTER_NODE(fn, fc, i) for (i = 0; i < (fc)->num_filters \
+	&& (fn = (fc)->filter_nodes + i); i++)
+
 
 /**
  * Used to manage grab clients.
@@ -132,11 +129,6 @@ struct filter_callback {
 };
 
 
-void close_filters(struct filter_chain *fc);
-void filter_init(struct filter *all_filters);
-int check_filter_arg(char *filter_arg, void **conf);
-void filter_pre_select(__a_unused struct sched *s, struct task *t);
-
 /**
  * The structure associated with a paraslash filter.
  *
@@ -208,6 +200,11 @@ struct filter {
 	void *(*parse_config)(int argc, char **argv);
 };
 
+void close_filters(struct filter_chain *fc);
+void filter_init(struct filter *all_filters);
+int check_filter_arg(char *filter_arg, void **conf);
+void filter_pre_select(__a_unused struct sched *s, struct task *t);
+
 
 static inline void write_int16_host_endian(char *buf, int val)
 {
@@ -235,8 +232,6 @@ extern struct filter filters[];
 
 /* filters that are always present */
 DECLARE_EXTERN_FILTER_INIT(wav);
-/* wav is always the first filter */
-#define WAV_FILTER_NUM 0
 DECLARE_EXTERN_FILTER_INIT(compress);
 
 /* next the optional filters */