From: Andre Noll <maan@systemlinux.org>
Date: Mon, 4 Jan 2010 22:02:42 +0000 (+0100)
Subject: Introduce prepare_writer_node().
X-Git-Tag: v0.4.2~204
X-Git-Url: http://git.tue.mpg.de/?a=commitdiff_plain;h=03683166610b241183b3cdb311069c96144fa53e;p=paraslash.git

Introduce prepare_writer_node().

Unused yet.
---

diff --git a/error.h b/error.h
index 1a2b3a4c..08d6bd6e 100644
--- a/error.h
+++ b/error.h
@@ -423,6 +423,7 @@ extern const char **para_errlist[];
 
 #define WRITE_COMMON_ERRORS \
 	PARA_ERROR(WRITE_COMMON_SYNTAX, "syntax error in write option"), \
+	PARA_ERROR(WRITE_COMMON_EOF, "write: end of file"), \
 
 
 #define AACDEC_FILTER_ERRORS \
diff --git a/write.h b/write.h
index a88b3537..49e56c38 100644
--- a/write.h
+++ b/write.h
@@ -25,6 +25,7 @@ struct writer_node {
 	size_t written;
 	struct btr_node *btrn;
 	struct task task;
+	size_t min_iqs;
 };
 
 /** Describes one supported writer. */
diff --git a/write_common.c b/write_common.c
index 7c0d9521..ff8999f6 100644
--- a/write_common.c
+++ b/write_common.c
@@ -303,3 +303,20 @@ void print_writer_helps(int detailed)
 		ggo_print_help(&w->help, detailed);
 	}
 }
+
+int prepare_writer_node(struct writer_node *wn)
+{
+	struct btr_node *btrn = wn->btrn;
+	size_t iqs;
+
+	if (btr_eof(btrn))
+		return -E_WRITE_COMMON_EOF;
+	iqs = btr_get_input_queue_size(btrn);
+	if (iqs < wn->min_iqs && !btr_no_parent(btrn))
+		return 0;
+	assert(iqs != 0);
+	/* avoid "buffer too small" errors from the decoder */
+	btr_merge(btrn, wn->min_iqs);
+	return 1;
+}
+
diff --git a/write_common.h b/write_common.h
index f34ad3fe..34e21cee 100644
--- a/write_common.h
+++ b/write_common.h
@@ -14,3 +14,4 @@ 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 prepare_writer_node(struct writer_node *wn);