1 files changed, 131 insertions, 0 deletions
diff --git a/gst/matroska/matroska-ids.c b/gst/matroska/matroska-ids.c
new file mode 100644
index 00000000..dde46769
--- /dev/null
+++ b/gst/matroska/matroska-ids.c
@@ -0,0 +1,131 @@
+/* GStreamer Matroska muxer/demuxer
+ * (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ * (C) 2006 Tim-Philipp Müller <tim centricular net>
+ *
+ * matroska-ids.c: matroska track context utility functions
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "matroska-ids.h"
+
+gboolean
+gst_matroska_track_init_video_context (GstMatroskaTrackContext ** p_context)
+{
+  GstMatroskaTrackVideoContext *video_context;
+
+  g_assert (p_context != NULL && *p_context != NULL);
+
+  /* already set up? (track info might come before track type) */
+  if ((*p_context)->type == GST_MATROSKA_TRACK_TYPE_VIDEO) {
+    GST_LOG ("video context already set up");
+    return TRUE;
+  }
+
+  /* it better not have been set up as some other track type ... */
+  if ((*p_context)->type != 0) {
+    g_return_val_if_reached (FALSE);
+  }
+
+  video_context = g_renew (GstMatroskaTrackVideoContext, *p_context, 1);
+  *p_context = (GstMatroskaTrackContext *) video_context;
+
+  /* defaults */
+  (*p_context)->type = GST_MATROSKA_TRACK_TYPE_VIDEO;
+  video_context->display_width = 0;
+  video_context->display_height = 0;
+  video_context->pixel_width = 0;
+  video_context->pixel_height = 0;
+  video_context->eye_mode = 0;
+  video_context->asr_mode = 0;
+  video_context->fourcc = 0;
+  return TRUE;
+}
+
+gboolean
+gst_matroska_track_init_audio_context (GstMatroskaTrackContext ** p_context)
+{
+  GstMatroskaTrackAudioContext *audio_context;
+
+  g_assert (p_context != NULL && *p_context != NULL);
+
+  /* already set up? (track info might come before track type) */
+  if ((*p_context)->type == GST_MATROSKA_TRACK_TYPE_AUDIO)
+    return TRUE;
+
+  /* it better not have been set up as some other track type ... */
+  if ((*p_context)->type != 0) {
+    g_return_val_if_reached (FALSE);
+  }
+
+  audio_context = g_renew (GstMatroskaTrackAudioContext, *p_context, 1);
+  *p_context = (GstMatroskaTrackContext *) audio_context;
+
+  /* defaults */
+  (*p_context)->type = GST_MATROSKA_TRACK_TYPE_AUDIO;
+  audio_context->channels = 1;
+  audio_context->samplerate = 8000;
+  return TRUE;
+}
+
+gboolean
+gst_matroska_track_init_subtitle_context (GstMatroskaTrackContext ** p_context)
+{
+  GstMatroskaTrackSubtitleContext *subtitle_context;
+
+  g_assert (p_context != NULL && *p_context != NULL);
+
+  /* already set up? (track info might come before track type) */
+  if ((*p_context)->type == GST_MATROSKA_TRACK_TYPE_SUBTITLE)
+    return TRUE;
+
+  /* it better not have been set up as some other track type ... */
+  if ((*p_context)->type != 0) {
+    g_return_val_if_reached (FALSE);
+  }
+
+  subtitle_context = g_renew (GstMatroskaTrackSubtitleContext, *p_context, 1);
+  *p_context = (GstMatroskaTrackContext *) subtitle_context;
+
+  (*p_context)->type = GST_MATROSKA_TRACK_TYPE_SUBTITLE;
+  return TRUE;
+}
+
+gboolean
+gst_matroska_track_init_complex_context (GstMatroskaTrackContext ** p_context)
+{
+  GstMatroskaTrackComplexContext *complex_context;
+
+  g_assert (p_context != NULL && *p_context != NULL);
+
+  /* already set up? (track info might come before track type) */
+  if ((*p_context)->type == GST_MATROSKA_TRACK_TYPE_COMPLEX)
+    return TRUE;
+
+  /* it better not have been set up as some other track type ... */
+  if ((*p_context)->type != 0) {
+    g_return_val_if_reached (FALSE);
+  }
+
+  complex_context = g_renew (GstMatroskaTrackComplexContext, *p_context, 1);
+  *p_context = (GstMatroskaTrackContext *) complex_context;
+  (*p_context)->type = GST_MATROSKA_TRACK_TYPE_COMPLEX;
+  return TRUE;
+}