qtdemux: Export MPEG-4 video profile and level in stream caps

This uses gstpbutils to extract the profile and level from the video
object sequence and adds this to stream caps. This can be used as
metadata and for fine-grained decoder selection.

https://bugzilla.gnome.org/show_bug.cgi?id=616521

diff --git a/gst/qtdemux/qtdemux.c b/gst/qtdemux/qtdemux.c
index bd2e089..53571be 100644 (file)
--- a/gst/qtdemux/qtdemux.c
+++ b/gst/qtdemux/qtdemux.c
@@ -7484,6 +7484,13 @@ gst_qtdemux_handle_esds (GstQTDemux * qtdemux, QtDemuxStream * stream,
    * codecs. */
   switch (object_type_id) {
     case 0x20:                 /* MPEG-4 */
+      /* 4 bytes for the visual_object_sequence_start_code and 1 byte for the
+       * profile_and_level_indication */
+      if (data_ptr != NULL && data_len >= 5 &&
+          GST_READ_UINT32_BE (data_ptr) == 0x000001b0) {
+        gst_codec_utils_mpeg4video_caps_set_level_and_profile (stream->caps,
+            data_ptr + 4, data_len - 4);
+      }
       break;                    /* Nothing special needed here */
     case 0x21:                 /* H.264 */
       codec_name = "H.264 / AVC";