From 045c1d602dcba57868845ba3270510593c39480f Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 15 May 2008 23:34:41 +0000
Subject: merge glitch-free branch back into trunk

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2445 fefdeb5f-60dc-0310-8127-8f9354f1896f
---
 src/pulsecore/memblockq.h | 43 ++++++++++++++++++++++++++++++++-----------
 1 file changed, 32 insertions(+), 11 deletions(-)

(limited to 'src/pulsecore/memblockq.h')

diff --git a/src/pulsecore/memblockq.h b/src/pulsecore/memblockq.h
index 46637f10..7c38757f 100644
--- a/src/pulsecore/memblockq.h
+++ b/src/pulsecore/memblockq.h
@@ -62,7 +62,9 @@ typedef struct pa_memblockq pa_memblockq;
    - minreq:    pa_memblockq_missing() will only return values greater
                 than this value. Pass 0 for the default.
 
-   - silence:   return this memblock when reading unitialized data
+   - maxrewind: how many bytes of history to keep in the queue
+
+   - silence:   return this memchunk when reading unitialized data
 */
 pa_memblockq* pa_memblockq_new(
         int64_t idx,
@@ -71,7 +73,8 @@ pa_memblockq* pa_memblockq_new(
         size_t base,
         size_t prebuf,
         size_t minreq,
-        pa_memblock *silence);
+        size_t maxrewind,
+        pa_memchunk *silence);
 
 void pa_memblockq_free(pa_memblockq*bq);
 
@@ -95,7 +98,7 @@ int pa_memblockq_peek(pa_memblockq* bq, pa_memchunk *chunk);
 void pa_memblockq_drop(pa_memblockq *bq, size_t length);
 
 /* Test if the pa_memblockq is currently readable, that is, more data than base */
-int pa_memblockq_is_readable(pa_memblockq *bq);
+pa_bool_t pa_memblockq_is_readable(pa_memblockq *bq);
 
 /* Return the length of the queue in bytes */
 size_t pa_memblockq_get_length(pa_memblockq *bq);
@@ -107,6 +110,9 @@ size_t pa_memblockq_missing(pa_memblockq *bq);
  * this function, reset the internal counter to 0. */
 size_t pa_memblockq_pop_missing(pa_memblockq *bq);
 
+/* Directly moves the data from the source memblockq into bq */
+int pa_memblockq_splice(pa_memblockq *bq, pa_memblockq *source);
+
 /* Returns the minimal request value */
 size_t pa_memblockq_get_minreq(pa_memblockq *bq);
 
@@ -125,10 +131,8 @@ int64_t pa_memblockq_get_read_index(pa_memblockq *bq);
 /* Return the current write index */
 int64_t pa_memblockq_get_write_index(pa_memblockq *bq);
 
-/* Shorten the pa_memblockq to the specified length by dropping data
- * at the read end of the queue. The read index is increased until the
- * queue has the specified length */
-void pa_memblockq_shorten(pa_memblockq *bq, size_t length);
+/* Rewind the read index. If the history is shorter than the specified length we'll point to silence afterwards. */
+void pa_memblockq_rewind(pa_memblockq *bq, size_t length);
 
 /* Ignore prebuf for now */
 void pa_memblockq_prebuf_disable(pa_memblockq *bq);
@@ -142,10 +146,27 @@ size_t pa_memblockq_get_maxlength(pa_memblockq *bq);
 /* Return the prebuffer length in bytes */
 size_t pa_memblockq_get_prebuf(pa_memblockq *bq);
 
-/* Change metrics. */
-void pa_memblockq_set_maxlength(pa_memblockq *memblockq, size_t maxlength);
-void pa_memblockq_set_tlength(pa_memblockq *memblockq, size_t tlength);
-void pa_memblockq_set_prebuf(pa_memblockq *memblockq, size_t prebuf);
+/* Change metrics. Always call in order. */
+void pa_memblockq_set_maxlength(pa_memblockq *memblockq, size_t maxlength); /* might modify tlength, prebuf, minreq too */
+void pa_memblockq_set_tlength(pa_memblockq *memblockq, size_t tlength); /* might modify minreq, too */
+void pa_memblockq_set_prebuf(pa_memblockq *memblockq, size_t prebuf); /* might modify minreq, too */
 void pa_memblockq_set_minreq(pa_memblockq *memblockq, size_t minreq);
+void pa_memblockq_set_maxrewind(pa_memblockq *memblockq, size_t rewind); /* Set the maximum history size */
+void pa_memblockq_set_silence(pa_memblockq *memblockq, pa_memchunk *silence);
+
+/* Call pa_memchunk_willneed() for every chunk in the queue from the current read pointer to the end */
+void pa_memblockq_willneed(pa_memblockq *bq);
+
+/* Check whether the memblockq is completely empty, i.e. no data
+ * neither left nor right of the read pointer, and hence no buffered
+ * data for the future nor data in the backlog. */
+pa_bool_t pa_memblockq_is_empty(pa_memblockq *bq);
+
+void pa_memblockq_silence(pa_memblockq *bq);
+
+/* Check whether we currently are in prebuf state */
+pa_bool_t pa_memblockq_prebuf_active(pa_memblockq *bq);
+
+unsigned pa_memblockq_get_nblocks(pa_memblockq *bq);
 
 #endif
-- 
cgit