From: Andre Noll <maan@systemlinux.org>
Date: Tue, 5 Jan 2010 05:04:04 +0000 (+0100)
Subject: Add get_btr_samplerate() and get_btr_channels().
X-Git-Tag: v0.4.2~199
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=10079828feee9a5b45937a7b9615c926a286782b

Add get_btr_samplerate() and get_btr_channels().

These are needed by more than one writer.
---

diff --git a/write_common.c b/write_common.c
index 14ce8195..9af8d682 100644
--- a/write_common.c
+++ b/write_common.c
@@ -304,3 +304,31 @@ void print_writer_helps(int detailed)
 		ggo_print_help(&w->help, detailed);
 	}
 }
+
+static int get_btr_value(struct btr_node *btrn, const char *key, int32_t *result)
+{
+	char *buf = NULL;
+	int ret = btr_exec_up(btrn, key, &buf);
+
+	if (ret < 0)
+		return ret;
+	ret = para_atoi32(buf, result);
+	free(buf);
+	return ret;
+}
+
+/*
+ * Ask parent btr nodes for the samplerate of the current stream.
+ */
+int get_btr_samplerate(struct btr_node *btrn, int32_t *result)
+{
+	return get_btr_value(btrn, "samplerate", result);
+}
+
+/*
+ * Ask parent btr nodes for the channel count of the current stream.
+ */
+int get_btr_channels(struct btr_node *btrn, int32_t *result)
+{
+	return get_btr_value(btrn, "channels", result);
+}
diff --git a/write_common.h b/write_common.h
index f34ad3fe..ef5a7c03 100644
--- a/write_common.h
+++ b/write_common.h
@@ -14,3 +14,5 @@ void *check_writer_arg(const char *wa, int *writer_num);
 struct writer_node_group *setup_default_wng(void);
 void print_writer_helps(int detailed);
 struct writer_node *setup_writer_node(const char *arg, struct btr_node *parent);
+int get_btr_samplerate(struct btr_node *btrn, int32_t *result);
+int get_btr_channels(struct btr_node *btrn, int32_t *result);