X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=vss.c;h=9aeff44fd77e508d7c842a386a115ef5f72330cf;hp=ea647254e497ac9ffa7eb3963a6a11759719d67b;hb=1a6fca660c4c8af101be0d576e009f40275757c0;hpb=aee7bc654a67f45556ad2c6dc0e98a06bc95c8ff

diff --git a/vss.c b/vss.c
index ea647254..9aeff44f 100644
--- a/vss.c
+++ b/vss.c
@@ -31,6 +31,7 @@
 #include "send.h"
 #include "error.h"
 #include "string.h"
+#include "fd.h"
 
 extern const char *status_item_list[];
 
@@ -42,7 +43,8 @@ static struct timeval autoplay_barrier;
 extern struct misc_meta_data *mmd;
 extern struct audio_file_selector selectors[];
 extern struct sender senders[];
-static size_t *chunk_table;
+static char *inbuf;
+static size_t *chunk_table, inbuf_size;
 
 static FILE *audio_file = NULL;
 
@@ -499,6 +501,40 @@ again:
 	return ret;
 }
 
+/**
+ * read a chunk of data from the current audio file
+ *
+ * \param current_chunk the chunk number to read
+ *
+ * \return The length of the chunk on success, zero on end of file, negative on
+ * errors.  Note: If the current chunk is of length zero, but the end of the
+ * file is not yet reached, this function returns -E_EMPTY_CHUNK.
+ * */
+ssize_t vss_read_chunk(void)
+{
+	ssize_t len;
+	size_t pos;
+	int ret;
+	long unsigned cc = mmd->current_chunk;
+
+	if (cc >= mmd->chunks_total) /* eof */
+		return 0;
+	len = chunk_table[cc + 1] - chunk_table[cc];
+	if (!len) /* nothing to send for this run */
+		return -E_EMPTY_CHUNK;
+	pos = chunk_table[cc];
+	if (inbuf_size < len) {
+		PARA_INFO_LOG("increasing inbuf for chunk #%lu/%lu to %zu bytes\n",
+			cc, mmd->chunks_total, len);
+		inbuf = para_realloc(inbuf, len);
+		inbuf_size = len;
+	}
+	ret = para_fseek(audio_file, pos, SEEK_SET);
+	if (ret < 0)
+		return ret;
+	return para_fread(inbuf, len, 1, audio_file);
+}
+
 /**
  * main sending function
  *
@@ -511,12 +547,10 @@ again:
  * Return value: Positive return value on success, zero on eof and negative
  * on errors.
  */
-
 void vss_send_chunk(void)
 {
 	int i;
 	struct audio_format_handler *af;
-	char *buf;
 	ssize_t ret;
 	struct timeval now, due;
 
@@ -532,16 +566,23 @@ void vss_send_chunk(void)
 	if (chk_barrier("data send", &now, &data_send_barrier,
 			&due, 1) < 0)
 		return;
-	buf = af->read_chunk(mmd->current_chunk, &ret);
+	ret= vss_read_chunk();
 	mmd->new_vss_status_flags &= ~VSS_REPOS;
-	if (!buf) {
-		if (ret < 0)
+	if (!ret || (ret < 0 && ret != -E_EMPTY_CHUNK)) {
+		if (ret < 0) {
 			mmd->new_vss_status_flags = VSS_NEXT;
-		else
+			PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
+		} else
 			mmd->new_vss_status_flags |= VSS_NEXT;
 		vss_eof(af);
 		return;
 	}
+	/*
+	 * 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.
+  	 */
+	if (ret < 0)
+		ret = 0;
 	if (!mmd->chunks_sent) {
 		struct timeval tmp;
 		gettimeofday(&mmd->stream_start, NULL);
@@ -550,7 +591,7 @@ void vss_send_chunk(void)
 		mmd->events++;
 	}
 	for (i = 0; senders[i].name; i++)
-		senders[i].send(mmd->current_chunk, mmd->chunks_sent, buf, ret);
+		senders[i].send(mmd->current_chunk, mmd->chunks_sent, inbuf, ret);
 	mmd->new_vss_status_flags |= VSS_PLAYING;
 	mmd->chunks_sent++;
 	mmd->current_chunk++;