From f349fb381066e316a38e3a068cb287ce36684a5f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <slomo@circular-chaos.org>
Date: Wed, 16 Aug 2006 10:40:04 +0000
Subject: ext/wavpack/: In push mode, re-sync to next wavpack header if sync is
 lost (#351557). Also use hyphens instead of und...
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Original commit message from CVS:
Patch by: Sebastian Dröge <slomo at circular-chaos.org>
* ext/wavpack/gstwavpackenc.c: (gst_wavpack_enc_class_init):
* ext/wavpack/gstwavpackparse.c:
(gst_wavpack_parse_resync_adapter), (gst_wavpack_parse_chain):
In push mode, re-sync to next wavpack header if sync is lost
(#351557). Also use hyphens instead of underscores in
GObject property names.
---
 ext/wavpack/gstwavpackenc.c   |  6 +++---
 ext/wavpack/gstwavpackparse.c | 37 +++++++++++++++++++++++++++++++++++--
 2 files changed, 38 insertions(+), 5 deletions(-)

(limited to 'ext')

diff --git a/ext/wavpack/gstwavpackenc.c b/ext/wavpack/gstwavpackenc.c
index 60ab40a2..d5cd0191 100644
--- a/ext/wavpack/gstwavpackenc.c
+++ b/ext/wavpack/gstwavpackenc.c
@@ -238,7 +238,7 @@ gst_wavpack_enc_class_init (GstWavpackEncClass * klass)
           "This enables lossy encoding! A value smaller than 2.0 disables this.",
           0.0, 24.0, 0.0, G_PARAM_READWRITE));
   g_object_class_install_property (gobject_class, ARG_CORRECTION_MODE,
-      g_param_spec_enum ("correction_mode", "Correction file mode",
+      g_param_spec_enum ("correction-mode", "Correction file mode",
           "Use this mode for correction file creation. Only works in lossy mode!",
           GST_TYPE_WAVPACK_ENC_CORRECTION_MODE, DEFAULT_CORRECTION_MODE,
           G_PARAM_READWRITE));
@@ -247,10 +247,10 @@ gst_wavpack_enc_class_init (GstWavpackEncClass * klass)
           "Store MD5 hash of raw samples within the file.", FALSE,
           G_PARAM_READWRITE));
   g_object_class_install_property (gobject_class, ARG_EXTRA_PROCESSING,
-      g_param_spec_boolean ("extra_processing", "Extra processing",
+      g_param_spec_boolean ("extra-processing", "Extra processing",
           "Extra encode processing.", FALSE, G_PARAM_READWRITE));
   g_object_class_install_property (gobject_class, ARG_JOINT_STEREO_MODE,
-      g_param_spec_enum ("joint_stereo_mode", "Joint-Stereo mode",
+      g_param_spec_enum ("joint-stereo-mode", "Joint-Stereo mode",
           "Use this joint-stereo mode.", GST_TYPE_WAVPACK_ENC_JOINT_STEREO_MODE,
           DEFAULT_JS_MODE, G_PARAM_READWRITE));
 }
diff --git a/ext/wavpack/gstwavpackparse.c b/ext/wavpack/gstwavpackparse.c
index 720b25b0..20b024f3 100644
--- a/ext/wavpack/gstwavpackparse.c
+++ b/ext/wavpack/gstwavpackparse.c
@@ -935,6 +935,34 @@ pause:
   }
 }
 
+static gboolean
+gst_wavpack_parse_resync_adapter (GstAdapter * adapter)
+{
+  const guint8 *buf;
+  guint avail = gst_adapter_available (adapter);
+  gchar *marker;
+
+  if (avail < 4)
+    return FALSE;
+
+  /* if the marker is at the beginning don't do the expensive search */
+  buf = gst_adapter_peek (adapter, 4);
+  if (memcmp (buf, "wvpk", 4) == 0)
+    return TRUE;
+
+  if (avail == 4)
+    return FALSE;
+
+  /* search for the marker in the complete content of the adapter */
+  buf = gst_adapter_peek (adapter, avail);
+  if (buf && (marker = g_strstr_len ((gchar *) buf, avail, "wvpk"))) {
+    gst_adapter_flush (adapter, marker - (gchar *) buf);
+    return TRUE;
+  }
+
+  return FALSE;
+}
+
 static GstFlowReturn
 gst_wavpack_parse_chain (GstPad * pad, GstBuffer * buf)
 {
@@ -956,11 +984,12 @@ gst_wavpack_parse_chain (GstPad * pad, GstBuffer * buf)
   if (gst_adapter_available (wvparse->adapter) < sizeof (WavpackHeader))
     return ret;
 
+  if (!gst_wavpack_parse_resync_adapter (wvparse->adapter))
+    return ret;
+
   tmp_buf = gst_adapter_peek (wvparse->adapter, sizeof (WavpackHeader));
   gst_wavpack_read_header (&wph, (guint8 *) tmp_buf);
 
-  /* FIXME: should check for wavpack marker here and re-sync if not */
-
   while (gst_adapter_available (wvparse->adapter) >= wph.ckSize + 4 * 1 + 4) {
     GstBuffer *outbuf =
         gst_adapter_take_buffer (wvparse->adapter, wph.ckSize + 4 * 1 + 4);
@@ -983,6 +1012,10 @@ gst_wavpack_parse_chain (GstPad * pad, GstBuffer * buf)
 
     if (gst_adapter_available (wvparse->adapter) >= sizeof (WavpackHeader)) {
       tmp_buf = gst_adapter_peek (wvparse->adapter, sizeof (WavpackHeader));
+
+      if (!gst_wavpack_parse_resync_adapter (wvparse->adapter))
+        break;
+
       gst_wavpack_read_header (&wph, (guint8 *) tmp_buf);
     }
   }
-- 
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