X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=vss.c;h=a16b006ffa0527d5d4f4301b1e13122457b1756a;hp=7892fb14656317453304b37d4c09dcb8bcc40006;hb=245b44acd4f1c16395844683f6aff10699967dc0;hpb=d3eb6494a1883dac8a59ba3c82ada0fbc8ce0971;ds=sidebyside

diff --git a/vss.c b/vss.c
index 7892fb14..a16b006f 100644
--- a/vss.c
+++ b/vss.c
@@ -495,6 +495,32 @@ again:
 	return ret;
 }
 
+static void get_chunk(long unsigned chunk_num, char **buf, size_t *len)
+{
+	size_t pos = mmd->afi.chunk_table[chunk_num];
+	*buf = map + pos;
+	*len = mmd->afi.chunk_table[chunk_num + 1] - pos;
+}
+
+/**
+ * Get the data of the given chunk.
+ *
+ * \param chunk_num The number of the desired chunk.
+ * \param buf Chunk data.
+ * \param len Chunk length in bytes.
+ *
+ * \return Positive on success, negative on errors.
+ */
+int vss_get_chunk(long unsigned chunk_num, char **buf, size_t *len)
+{
+	if (mmd->audio_format < 0 || !map || !vss_playing())
+		return -E_CHUNK;
+	if (chunk_num >= mmd->afi.chunks_total)
+		return -E_CHUNK;
+	get_chunk(chunk_num, buf, len);
+	return 1;
+}
+
 /**
  * main sending function
  *
@@ -508,8 +534,6 @@ void vss_send_chunk(void)
 {
 	int i;
 	struct audio_format_handler *af;
-	ssize_t pos;
-	size_t len;
 	struct timeval now, due;
 
 	if (mmd->audio_format < 0 || !map || !vss_playing())
@@ -529,8 +553,6 @@ void vss_send_chunk(void)
 		mmd->new_vss_status_flags |= VSS_NEXT;
 		return vss_eof();
 	}
-	pos = mmd->afi.chunk_table[mmd->current_chunk];
-	len = mmd->afi.chunk_table[mmd->current_chunk + 1] - pos;
 	/*
 	 * We call the send function also in case of empty chunks as they
   	 * might have still some data queued which can be sent in this case.
@@ -542,9 +564,12 @@ void vss_send_chunk(void)
 		mmd->offset = tv2ms(&tmp);
 		mmd->events++;
 	}
-	for (i = 0; senders[i].name; i++)
-		senders[i].send(mmd->current_chunk, mmd->chunks_sent,
-			map + pos, len);
+	for (i = 0; senders[i].name; i++) {
+		char *buf;
+		size_t len;
+		get_chunk(mmd->current_chunk, &buf, &len);
+		senders[i].send(mmd->current_chunk, mmd->chunks_sent, buf, len);
+	}
 	mmd->new_vss_status_flags |= VSS_PLAYING;
 	mmd->chunks_sent++;
 	mmd->current_chunk++;