/** \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 {
+ /** The length of the filter chain. */
+ unsigned int num_filters;
/**
* The number of channels of the current stream.
*
*/
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.
*
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.
};
-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.
*
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)
{
/* 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);
+DECLARE_EXTERN_FILTER_INIT(amp);
/* next the optional filters */
#ifdef HAVE_MAD
#define DEFINE_FILTER_ARRAY(filters) struct filter filters[] = { \
FILTER_INIT(wav) \
FILTER_INIT(compress) \
+ FILTER_INIT(amp) \
MP3DEC_FILTER \
AACDEC_FILTER \
OGGDEC_FILTER \