/*
- * Copyright (C) 2005-2010 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2014 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"
static int parse_filter_args(int filter_num, char *options, void **conf)
{
struct filter *f = &filters[filter_num];
- int ret, i, argc = 2;
+ int ret, argc;
char **argv;
-// PARA_DEBUG_LOG("%s, options: %s, parser: %p\n", f->name,
-// options? options : "(none)", f->parse_config);
if (!f->parse_config)
return strlen(options)? -E_BAD_FILTER_OPTIONS : filter_num;
-// PARA_DEBUG_LOG("options: %s\n", options);
- argc = create_argv(options, " \t", &argv);
+ argc = create_shifted_argv(options, " \t", &argv);
if (argc < 0)
return -E_BAD_FILTER_OPTIONS;
- PARA_DEBUG_LOG("argc = %d, argv[0]: %s\n", argc, argv[0]);
- for (i = argc - 1; i >= 0; i--)
- argv[i + 1] = argv[i];
argv[0] = para_strdup(f->name);
- argc++;
ret = f->parse_config(argc, argv, conf);
- free(argv[argc - 1]);
- argv[argc - 1] = NULL;
free_argv(argv);
return ret < 0? ret : filter_num;
}
return -E_UNSUPPORTED_FILTER;
}
-void print_filter_helps(int detailed)
+/**
+ * Print help text of each filter to stdout.
+ *
+ * \param flags Passed to \ref ggo_print_help().
+ */
+void print_filter_helps(unsigned flags)
{
- int i;
+ int i, num = 0;
- printf_or_die("\nAvailable filters: \n\t");
- FOR_EACH_SUPPORTED_FILTER(i)
- printf_or_die("%s%s", i? " " : "", filters[i].name);
- printf_or_die("\n\n");
+ printf_or_die("\nAvailable filters: ");
+ FOR_EACH_SUPPORTED_FILTER(i) {
+ if (num > 50) {
+ printf_or_die("\n ");
+ num = 0;
+ }
+ num += printf_or_die("%s%s", i? " " : "", filters[i].name);
+ }
+ printf_or_die("\n");
FOR_EACH_SUPPORTED_FILTER(i) {
struct filter *f = filters + i;
if (!f->help.short_help)
continue;
- printf_or_die("Options for %s:\n", f->name);
- ggo_print_help(&f->help, detailed);
+ printf_or_die("\nOptions for %s (%s):", f->name,
+ f->help.purpose);
+ ggo_print_help(&f->help, flags);
}
}
-void generic_filter_pre_select(struct sched *s, struct task *t)
+/**
+ * Set select timeout of the scheduler.
+ *
+ * \param s The scheduler.
+ * \param context Pointer to the filter node (task context).
+ *
+ * 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 occurred, 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, void *context)
{
- struct filter_node *fn = container_of(t, struct filter_node, task);
+ struct filter_node *fn = context;
- t->error = 0;
if (btr_node_status(fn->btrn, fn->min_iqs, BTR_NT_INTERNAL) != 0)
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,
+ * 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)
+{
+ if (!strcmp(cmd, "sample_rate")) {
+ if (sample_rate == 0)
+ return -E_BTR_NAVAIL;
+ *result = make_message("%u", sample_rate);
+ return 1;
+ }
+ if (!strcmp(cmd, "channels")) {
+ if (channels == 0)
+ return -E_BTR_NAVAIL;
+ *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);
+}