From 0489f5277649826d1b38213c234fb0fe27206c2c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian.droege@collabora.co.uk>
Date: Wed, 2 Jan 2013 10:26:04 +0100
Subject: [PATCH] mfc: Check if the hardware is available in
 GstVideoDecoder::open()

---
 sys/mfc/gstmfcdec.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/sys/mfc/gstmfcdec.c b/sys/mfc/gstmfcdec.c
index 7530f3c076..ec12192d82 100644
--- a/sys/mfc/gstmfcdec.c
+++ b/sys/mfc/gstmfcdec.c
@@ -30,6 +30,7 @@
 GST_DEBUG_CATEGORY_STATIC (gst_mfc_dec_debug);
 #define GST_CAT_DEFAULT gst_mfc_dec_debug
 
+static gboolean gst_mfc_dec_open (GstVideoDecoder * decoder);
 static gboolean gst_mfc_dec_start (GstVideoDecoder * decoder);
 static gboolean gst_mfc_dec_stop (GstVideoDecoder * decoder);
 static gboolean gst_mfc_dec_set_format (GstVideoDecoder * decoder,
@@ -109,6 +110,7 @@ gst_mfc_dec_class_init (GstMFCDecClass * klass)
       "Decode video streams via Samsung Exynos",
       "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
 
+  video_decoder_class->open = GST_DEBUG_FUNCPTR (gst_mfc_dec_open);
   video_decoder_class->start = GST_DEBUG_FUNCPTR (gst_mfc_dec_start);
   video_decoder_class->stop = GST_DEBUG_FUNCPTR (gst_mfc_dec_stop);
   video_decoder_class->finish = GST_DEBUG_FUNCPTR (gst_mfc_dec_finish);
@@ -132,6 +134,28 @@ gst_mfc_dec_init (GstMFCDec * self)
   gst_video_decoder_set_packetized (decoder, TRUE);
 }
 
+static gboolean
+gst_mfc_dec_open (GstVideoDecoder * decoder)
+{
+  GstMFCDec *self = GST_MFC_DEC (decoder);
+
+  GST_DEBUG_OBJECT (self, "Opening");
+
+  /* Just check here once if we can create a MFC context, i.e.
+   * if the hardware is available
+   */
+  self->context = mfc_dec_create (CODEC_TYPE_H264, 1);
+  if (!self->context) {
+    GST_ELEMENT_ERROR (self, LIBRARY, INIT,
+        ("Failed to initialize MFC decoder context"), (NULL));
+    return FALSE;
+  }
+  mfc_dec_destroy (self->context);
+  self->context = NULL;
+
+  return TRUE;
+}
+
 static gboolean
 gst_mfc_dec_start (GstVideoDecoder * decoder)
 {