[0.11] gst-plugins-good: ac3parse: use bsid 9 and 10 to control sample rate

[Wim Taymans]

Module: gst-plugins-good
Branch: 0.11
Commit: d17d13219c3293e0eb586ef54cb43187060dca92
URL:    http://cgit.freedesktop.org/gstreamer/gst-plugins-good/commit/?id=d17d13219c3293e0eb586ef54cb43187060dca92

Author: Vincent Penquerc'h <vincent.penquerch at collabora.co.uk>
Date:   Fri Sep  9 12:35:50 2011 +0100

ac3parse: use bsid 9 and 10 to control sample rate

See http://matroska.org/technical/specs/codecid/index.html

The spec is silent about this though...

https://bugzilla.gnome.org/show_bug.cgi?id=658546

---

 gst/audioparsers/gstac3parse.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/gst/audioparsers/gstac3parse.c b/gst/audioparsers/gstac3parse.c
index a1cb997..b2f9764 100644
--- a/gst/audioparsers/gstac3parse.c
+++ b/gst/audioparsers/gstac3parse.c
@@ -144,10 +144,10 @@ static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS ("audio/x-ac3, framed = (boolean) true, "
-        " channels = (int) [ 1, 6 ], rate = (int) [ 32000, 48000 ], "
+        " channels = (int) [ 1, 6 ], rate = (int) [ 8000, 48000 ], "
         " alignment = (string) { iec61937, frame}; "
         "audio/x-eac3, framed = (boolean) true, "
-        " channels = (int) [ 1, 6 ], rate = (int) [ 32000, 48000 ], "
+        " channels = (int) [ 1, 6 ], rate = (int) [ 8000, 48000 ], "
         " alignment = (string) { iec61937, frame}; "));
 
 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
@@ -300,7 +300,7 @@ gst_ac3_parse_frame_header_ac3 (GstAc3Parse * ac3parse, GstBuffer * buf,
     guint * sid)
 {
   GstBitReader bits = GST_BIT_READER_INIT_FROM_BUFFER (buf);
-  guint8 fscod, frmsizcod, bsid, acmod, lfe_on;
+  guint8 fscod, frmsizcod, bsid, acmod, lfe_on, rate_scale;
 
   GST_LOG_OBJECT (ac3parse, "parsing ac3");
 
@@ -337,10 +337,14 @@ gst_ac3_parse_frame_header_ac3 (GstAc3Parse * ac3parse, GstBuffer * buf,
 
   lfe_on = gst_bit_reader_get_bits_uint8_unchecked (&bits, 1);
 
+  /* 6/8->0, 9->1, 10->2,
+     see http://matroska.org/technical/specs/codecid/index.html */
+  rate_scale = (CLAMP (bsid, 8, 10) - 8);
+
   if (frame_size)
     *frame_size = frmsizcod_table[frmsizcod].frame_size[fscod] * 2;
   if (rate)
-    *rate = fscod_rates[fscod];
+    *rate = fscod_rates[fscod] >> rate_scale;
   if (chans)
     *chans = acmod_chans[acmod] + lfe_on;
   if (blks)