[SCM] libav/experimental: Add documentation about missing E-AC-3 features.
siretart at users.alioth.debian.org
siretart at users.alioth.debian.org
Sun Jun 30 16:41:34 UTC 2013
The following commit has been merged in the experimental branch:
commit 137707e53a29131ae6ed5a2ecb8960cbf1d6284a
Author: Justin Ruggles <justin.ruggles at gmail.com>
Date: Tue Mar 17 01:43:01 2009 +0000
Add documentation about missing E-AC-3 features.
Originally committed as revision 18021 to svn://svn.ffmpeg.org/ffmpeg/trunk
diff --git a/libavcodec/eac3dec.c b/libavcodec/eac3dec.c
index f57c1cc..8af729d 100644
--- a/libavcodec/eac3dec.c
+++ b/libavcodec/eac3dec.c
@@ -20,6 +20,34 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+/*
+ * There are several features of E-AC-3 that this decoder does not yet support.
+ *
+ * Spectral Extension
+ * There is a patch to get this working for the two samples we have that
+ * use it, but it needs some minor changes in order to be accepted.
+ *
+ * Enhanced Coupling
+ * No known samples exist. If any ever surface, this feature should not be
+ * too difficult to implement.
+ *
+ * Reduced Sample Rates
+ * No known samples exist. The spec also does not give clear information
+ * on how this is to be implemented.
+ *
+ * Dependent Streams
+ * Only the independent stream is currently decoded. Any dependent
+ * streams are skipped. We have only come across two examples of this, and
+ * they are both just test streams, one for HD-DVD and the other for
+ * Blu-ray.
+ *
+ * Transient Pre-noise Processing
+ * This is side information which a decoder should use to reduce artifacts
+ * caused by transients. There are samples which are known to have this
+ * information, but this decoder currently ignores it.
+ */
+
+
#include "avcodec.h"
#include "internal.h"
#include "aac_ac3_parser.h"
--
Libav/FFmpeg packaging
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