X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=vss.c;h=40a18e5cdf475ac312e8581508d10de20881b82d;hp=21f4cb4de07706f53591b3e7161f8c22a570ff24;hb=395aeb9da9c9cc2febe91b5a906c72e59e217594;hpb=badcf6125a8e0b2845348aca46d288f141e4f509

diff --git a/vss.c b/vss.c
index 21f4cb4d..40a18e5c 100644
--- a/vss.c
+++ b/vss.c
@@ -234,6 +234,17 @@ static int num_slices(long unsigned bytes, struct fec_client *fc, uint8_t *resul
 	return 1;
 }
 
+static void set_slice_duration(struct fec_client *fc, struct fec_group *g)
+{
+	struct timeval group_duration, *chunk_tv = vss_chunk_time();
+
+	tv_scale(g->num_chunks, chunk_tv, &group_duration);
+	tv_divide(fc->fcp->slices_per_group + fc->num_extra_slices,
+		&group_duration, &g->slice_duration);
+	PARA_DEBUG_LOG("durations (group/chunk/slice): %lu/%lu/%lu\n",
+		tv2ms(&group_duration), tv2ms(chunk_tv), tv2ms(&g->slice_duration));
+}
+
 static int setup_next_fec_group(struct fec_client *fc, struct vss_task *vsst)
 {
 	int ret, i, k, data_slices;
@@ -277,6 +288,8 @@ static int setup_next_fec_group(struct fec_client *fc, struct vss_task *vsst)
 		g->first_chunk = mmd->current_chunk;
 		g->num = 0;
 	} else {
+		/* use duration of the previous group for the timing of this group */
+		set_slice_duration(fc, g);
 		g->first_chunk += g->num_chunks;
 		g->num++;
 	}
@@ -303,6 +316,8 @@ static int setup_next_fec_group(struct fec_client *fc, struct vss_task *vsst)
 	g->num_chunks = i - g->first_chunk;
 	assert(g->num_chunks);
 	fc->current_slice_num = 0;
+	if (g->num == 0)
+		set_slice_duration(fc, g);
 
 	/* setup header slices */
 	buf = vsst->header_buf;
@@ -334,23 +349,20 @@ static int setup_next_fec_group(struct fec_client *fc, struct vss_task *vsst)
 		for (; i < k; i++)
 			fc->src_data[i] = (const unsigned char *)buf;
 	}
-
-	/* setup group timing */
-	tv_scale(g->first_chunk - fc->first_stream_chunk, chunk_tv, &tmp);
-	tv_add(&fc->stream_start, &tmp, &g->start);
-	if (g->num) /* quick hack to avoid buffer underruns */
-		g->start.tv_sec--;
-	tv_scale(g->num_chunks, chunk_tv, &tmp); /* group duration */
-	tv_divide(fc->fcp->slices_per_group + fc->num_extra_slices,
-		&tmp, &g->slice_duration);
-
-	PARA_DEBUG_LOG("FEC group %d: %d chunks (%d - %d), %d header slices, %d data slices\n",
+	PARA_DEBUG_LOG("FEC group %d: %d chunks (%d - %d), "
+		"%d header slices, %d data slices\n",
 		g->num, g->num_chunks, g->first_chunk,
 		g->first_chunk + g->num_chunks - 1,
 		g->num_header_slices, data_slices
 	);
-	PARA_DEBUG_LOG("durations (group/chunk/slice): %lu/%lu/%lu\n",
-		tv2ms(&tmp), tv2ms(chunk_tv), tv2ms(&g->slice_duration));
+	/* set group start */
+	if (g->num != 0 && vsst->header_len != 0 && fc->first_stream_chunk == 0)
+		/* chunk #0 is the audio file header */
+		tv_scale(g->first_chunk - 1, chunk_tv, &tmp);
+	else
+		tv_scale(g->first_chunk - fc->first_stream_chunk,
+			chunk_tv, &tmp);
+	tv_add(&fc->stream_start, &tmp, &g->start);
 	return 1;
 }
 
@@ -823,7 +835,7 @@ err:
  */
 static void vss_send(struct vss_task *vsst)
 {
-	int i, sent_something = 0;
+	int i, fec_active = 0;
 	struct timeval due;
 	struct fec_client *fc, *tmp_fc;
 
@@ -837,8 +849,10 @@ static void vss_send(struct vss_task *vsst)
 	list_for_each_entry_safe(fc, tmp_fc, &fec_client_list, node) {
 		if (fc->error < 0)
 			continue;
-		if (!next_slice_is_due(fc, NULL))
+		if (!next_slice_is_due(fc, NULL)) {
+			fec_active = 1;
 			continue;
+		}
 		if (compute_next_fec_slice(fc, vsst) <= 0)
 			continue;
 		PARA_DEBUG_LOG("sending %d:%d (%u bytes)\n", fc->group.num,
@@ -847,10 +861,10 @@ static void vss_send(struct vss_task *vsst)
 			fc->fcp->max_slice_bytes,
 			fc->fcp->private_data);
 		fc->current_slice_num++;
-		sent_something = 1;
+		fec_active = 1;
 	}
 	if (mmd->current_chunk >= mmd->afd.afhi.chunks_total) { /* eof */
-		if (!sent_something)
+		if (!fec_active)
 			mmd->new_vss_status_flags |= VSS_NEXT;
 		return;
 	}