X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=write_common.c;h=3f6c0bbea422bbbc44e16857000b78df6d45a5d8;hp=70a9a0155ff4e0a9e1f9b5bccf1054f1ea7a5275;hb=5587494468627e20fe622b6055689717262d09ab;hpb=9806b6a71702f88f1959d4562948a9af2939221e;ds=sidebyside

diff --git a/write_common.c b/write_common.c
index 70a9a015..3f6c0bbe 100644
--- a/write_common.c
+++ b/write_common.c
@@ -1,15 +1,18 @@
 /*
- * Copyright (C) 2006-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
  *
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
 /** \file write_common.c common functions of para_audiod and para_write */
 
+#include <regex.h>
+
 #include "para.h"
 #include "string.h"
 #include "list.h"
 #include "sched.h"
+#include "ggo.h"
 #include "write.h"
 #include "error.h"
 
@@ -19,35 +22,53 @@ const char *writer_names[] ={WRITER_NAMES};
 /** the array of supported writers */
 struct writer writers[NUM_SUPPORTED_WRITERS] = {WRITER_ARRAY};
 
-static void wng_pre_select(__a_unused struct sched *s, struct task *t)
+static void wng_pre_select(struct sched *s, struct task *t)
 {
 	struct writer_node_group *g = container_of(t, struct writer_node_group, task);
 	int i;
 
 	FOR_EACH_WRITER_NODE(i, g) {
 		struct writer_node *wn = &g->writer_nodes[i];
-		t->error = wn->writer->pre_select(s, wn);
+		struct writer *w = writers + wn->writer_num;
+		if (!w->pre_select)
+			continue;
+		t->error = w->pre_select(s, wn);
 		if (t->error < 0)
 			return;
 	}
+	/*
+	 * Force a minimal delay if something was written during the previous
+	 * call to wng_post_select(). This is necessary because the filter
+	 * chain might still have data for us which it couldn't convert during
+	 * the previous run due to its buffer size constraints. In this case we
+	 * do not want to wait until the next input data arrives as this could
+	 * lead to buffer underruns.
+	 */
+	if (g->last_written == 0)
+		return;
+	s->timeout.tv_sec = 0;
+	s->timeout.tv_usec = 1;
 }
 
 static void wng_post_select(struct sched *s, struct task *t)
 {
 	struct writer_node_group *g = container_of(t, struct writer_node_group, task);
 	int i;
-	size_t min_written = 0;
+	size_t min_written = 0, max_written = 0;
 
 	FOR_EACH_WRITER_NODE(i, g) {
 		struct writer_node *wn = &g->writer_nodes[i];
-		t->error = wn->writer->post_select(s, wn);
+		struct writer *w = writers + wn->writer_num;
+		t->error = w->post_select(s, wn);
 		if (t->error < 0)
 			return;
 		if (!i)
 			min_written = wn->written;
 		else
 			min_written = PARA_MIN(min_written, wn->written);
+		max_written = PARA_MAX(max_written, wn->written);
 	}
+	g->last_written = max_written;
 	//PARA_INFO_LOG("loaded: %zd, min_written: %zd bytes\n", *g->loaded, min_written);
 	if (min_written) {
 		*g->loaded -= min_written;
@@ -60,7 +81,7 @@ static void wng_post_select(struct sched *s, struct task *t)
 	}
 	if (*g->loaded && min_written) {
 //		PARA_INFO_LOG("moving %zd bytes\n", *g->loaded);
-		memmove(g->buf, g->buf + min_written, *g->loaded);
+		memmove(*g->bufp, *g->bufp + min_written, *g->loaded);
 	}
 }
 
@@ -81,23 +102,26 @@ int wng_open(struct writer_node_group *g)
 	PARA_NOTICE_LOG("opening wng %p with %d writer(s)\n", g, g->num_writers);
 	FOR_EACH_WRITER_NODE(i, g) {
 		struct writer_node *wn = &g->writer_nodes[i];
+		struct writer *w = writers + wn->writer_num;
 		wn->wng = g;
-		ret = wn->writer->open(wn);
+		ret = w->open(wn);
 		if (ret < 0)
 			goto err_out;
-		wn->chunk_bytes = ret;
-		g->max_chunk_bytes = PARA_MAX(g->max_chunk_bytes, ret);
 	}
 	sprintf(g->task.status, "%s", "writer node group");
 	register_task(&g->task);
+	g->open = 1;
 	return 1;
 err_out:
 	PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 	while (i > 0) {
 		struct writer_node *wn = &g->writer_nodes[--i];
-		wn->writer->close(wn);
+		struct writer *w = writers + wn->writer_num;
+		w->close(wn);
 	}
+	free(g->writer_nodes);
 	g->num_writers = 0;
+	g->task.error = -E_TASK_UNREGISTERED;
 	return ret;
 }
 
@@ -112,12 +136,13 @@ void wng_close(struct writer_node_group *g)
 {
 	int i;
 
-	if (!g)
+	if (!g || !g->open)
 		return;
 	PARA_NOTICE_LOG("closing wng with %d writer(s)\n", g->num_writers);
 	FOR_EACH_WRITER_NODE(i, g) {
 		struct writer_node *wn = &g->writer_nodes[i];
-		wn->writer->close(wn);
+		struct writer *w = writers + wn->writer_num;
+		w->close(wn);
 	}
 	free(g->writer_nodes);
 	free(g);
@@ -142,9 +167,9 @@ struct writer_node_group *wng_new(unsigned num_writers)
 }
 
 /**
- * call the init function of each supported paraslash writer
+ * Call the init function of each supported paraslash writer.
  */
-void init_supported_writers(void)
+void writer_init(void)
 {
 	int i;
 
@@ -203,9 +228,31 @@ void *check_writer_arg(const char *wa, int *writer_num)
 struct writer_node_group *setup_default_wng(void)
 {
 	struct writer_node_group *wng = wng_new(1);
-	wng->writer_nodes[0].writer = &writers[DEFAULT_WRITER];
+	wng->writer_nodes[0].writer_num = DEFAULT_WRITER;
 	PARA_INFO_LOG("using default writer: %s %p\n",
 		writer_names[DEFAULT_WRITER], writers[DEFAULT_WRITER].parse_config);
 	wng->writer_nodes[0].conf = writers[DEFAULT_WRITER].parse_config("");
 	return wng;
 }
+/**
+ * Print the help text of all writers to stdout.
+ *
+ * \param detailed Whether to print the detailed help text.
+ */
+void print_writer_helps(int detailed)
+{
+	int i;
+
+	printf_or_die("\nAvailable writers: \n\t");
+	FOR_EACH_WRITER(i)
+		printf_or_die("%s%s", i? " " : "", writer_names[i]);
+	printf_or_die("\n\n");
+	FOR_EACH_WRITER(i) {
+		struct writer *w = writers + i;
+
+		if (!w->help.short_help)
+			continue;
+		printf_or_die("Options for %s:\n", writer_names[i]);
+		ggo_print_help(&w->help, detailed);
+	}
+}