/*
- * Copyright (C) 2005-2010 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2012 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
#include <regex.h>
#include <sys/types.h>
-#include <dirent.h>
-#include <stdbool.h>
#include "para.h"
#include "list.h"
return -E_UNSUPPORTED_FILTER;
}
+/**
+ * Print help text of each filter to stdout.
+ *
+ * \param detailed If non-zero, print detailed help.
+ */
void print_filter_helps(int detailed)
{
int i;
}
}
+/**
+ * Set select timeout of the the scheduler.
+ *
+ * \param s The scheduler.
+ * \param t The task struct of this filter.
+ *
+ * This looks at the status of the btr node of the filter. If data is available
+ * in the input queue of the filter, or if an error occured, a minimal timeout
+ * for the next select call is requested from the scheduler. Otherwise the
+ * scheduler timeout is left unchanged.
+ */
void generic_filter_pre_select(struct sched *s, struct task *t)
{
struct filter_node *fn = container_of(t, struct filter_node, task);
sched_min_delay(s);
}
+#ifdef WORDS_BIGENDIAN
+#define DECODER_SAMPLE_FORMAT SF_S16_BE
+#else
+#define DECODER_SAMPLE_FORMAT SF_S16_LE
+#endif
+
/**
* Execute a btr command for a decoder.
*
- * The buffer tree nodes of the writers ask the parent nodes about sample_rate
- * and the channels count. This function is called by all decoders to answer
- * these queries.
+ * The buffer tree nodes of the writers ask the parent nodes about sample_rate,
+ * channels count and sample format. This function is called by all decoders to
+ * answer these queries.
*
* \param cmd The command to be executed by the child node.
* \param sample_rate Known to the decoder.
* \param channels Known to the decoder.
* \param result Ascii representation on the answer is stored here.
+ *
+ * \return Standard.
*/
int decoder_execute(const char *cmd, unsigned sample_rate, unsigned channels,
char **result)
*result = make_message("%u", channels);
return 1;
}
+ if (!strcmp(cmd, "sample_format")) {
+ *result = make_message("%u", DECODER_SAMPLE_FORMAT);
+ return 1;
+ }
return -ERRNO_TO_PARA_ERROR(ENOTSUP);
}