From 753d3c23a21db76f2d13d4378fd911e6da211bd1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Mon, 16 Dec 2013 10:00:37 +0100
Subject: [PATCH] sbcparse: Post AUDIO_CODEC tag

---
 gst/audioparsers/gstsbcparse.c | 38 ++++++++++++++++++++++++++++++----
 gst/audioparsers/gstsbcparse.h |  2 ++
 2 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/gst/audioparsers/gstsbcparse.c b/gst/audioparsers/gstsbcparse.c
index d14880a59c..bda6d2ff2a 100644
--- a/gst/audioparsers/gstsbcparse.c
+++ b/gst/audioparsers/gstsbcparse.c
@@ -40,9 +40,8 @@
 #include <string.h>
 #include <gst/tag/tag.h>
 #include <gst/audio/audio.h>
-
-#include <gst/base/gstbitreader.h>
-#include <gst/base/gstbytereader.h>
+#include <gst/base/base.h>
+#include <gst/pbutils/pbutils.h>
 
 #define SBC_SYNCBYTE 0x9C
 
@@ -67,6 +66,8 @@ static gboolean gst_sbc_parse_start (GstBaseParse * parse);
 static gboolean gst_sbc_parse_stop (GstBaseParse * parse);
 static GstFlowReturn gst_sbc_parse_handle_frame (GstBaseParse * parse,
     GstBaseParseFrame * frame, gint * skipsize);
+static GstFlowReturn gst_sbc_parse_pre_push_frame (GstBaseParse * parse,
+    GstBaseParseFrame * frame);
 static GstCaps *gst_sbc_parse_get_sink_caps (GstBaseParse * parse,
     GstCaps * filter);
 
@@ -90,7 +91,8 @@ gst_sbc_parse_class_init (GstSbcParseClass * klass)
 
   baseparse_class->start = GST_DEBUG_FUNCPTR (gst_sbc_parse_start);
   baseparse_class->stop = GST_DEBUG_FUNCPTR (gst_sbc_parse_stop);
-
+  baseparse_class->pre_push_frame =
+      GST_DEBUG_FUNCPTR (gst_sbc_parse_pre_push_frame);
   baseparse_class->handle_frame =
       GST_DEBUG_FUNCPTR (gst_sbc_parse_handle_frame);
   baseparse_class->get_sink_caps =
@@ -115,6 +117,7 @@ gst_sbc_parse_reset (GstSbcParse * sbcparse)
   sbcparse->n_blocks = -1;
   sbcparse->n_subbands = -1;
   sbcparse->bitpool = -1;
+  sbcparse->sent_codec_tag = FALSE;
 }
 
 static void
@@ -493,3 +496,30 @@ gst_sbc_parse_header (const guint8 * data, guint * rate, guint * n_blocks,
 
   return gst_sbc_calc_framelen (*n_subbands, *ch_mode, *n_blocks, *bitpool);
 }
+
+static GstFlowReturn
+gst_sbc_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
+{
+  GstSbcParse *sbcparse = GST_SBC_PARSE (parse);
+
+  if (!sbcparse->sent_codec_tag) {
+    GstTagList *taglist;
+    GstCaps *caps;
+
+    taglist = gst_tag_list_new_empty ();
+
+    /* codec tag */
+    caps = gst_pad_get_current_caps (GST_BASE_PARSE_SRC_PAD (parse));
+    gst_pb_utils_add_codec_description_to_tag_list (taglist,
+        GST_TAG_AUDIO_CODEC, caps);
+    gst_caps_unref (caps);
+
+    gst_pad_push_event (GST_BASE_PARSE_SRC_PAD (sbcparse),
+        gst_event_new_tag (taglist));
+
+    /* also signals the end of first-frame processing */
+    sbcparse->sent_codec_tag = TRUE;
+  }
+
+  return GST_FLOW_OK;
+}
diff --git a/gst/audioparsers/gstsbcparse.h b/gst/audioparsers/gstsbcparse.h
index 2115270e9a..1bebbe1ffc 100644
--- a/gst/audioparsers/gstsbcparse.h
+++ b/gst/audioparsers/gstsbcparse.h
@@ -61,6 +61,8 @@ struct _GstSbcParse {
   gint                    n_blocks;
   gint                    n_subbands;
   gint                    bitpool;
+
+  gboolean                sent_codec_tag;
 };
 
 struct _GstSbcParseClass {