audio-format: add gst_audio_formats_raw()

The existing GST_AUDIO_FORMATS_ALL macro is not binding friendly.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/676>

diff --git a/gst-libs/gst/audio/audio-format.c b/gst-libs/gst/audio/audio-format.c
index c41a0dd..2303495 100644 (file)
--- a/gst-libs/gst/audio/audio-format.c
+++ b/gst-libs/gst/audio/audio-format.c
@@ -516,3 +516,65 @@ gst_audio_format_fill_silence (const GstAudioFormatInfo * info,
     }
   }
 }
+
+struct RawAudioFormats
+{
+  GstAudioFormat *formats;
+  guint n;
+};
+
+static gpointer
+generate_raw_audio_formats (gpointer data)
+{
+  GValue list = G_VALUE_INIT;
+  struct RawAudioFormats *all = g_new (struct RawAudioFormats, 1);
+  gchar *tmp;
+  guint i;
+
+  g_value_init (&list, GST_TYPE_LIST);
+  /* Workaround a bug in our parser that would lead to segfaults
+   * when deserializing container types using static strings,
+   * see https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/446 */
+  tmp = g_strdup (GST_AUDIO_FORMATS_ALL);
+  g_assert (gst_value_deserialize (&list, tmp));
+  g_free (tmp);
+
+  all->n = gst_value_list_get_size (&list);
+  all->formats = g_new (GstAudioFormat, all->n);
+
+  for (i = 0; i < all->n; i++) {
+    const GValue *v = gst_value_list_get_value (&list, i);
+
+    all->formats[i] = gst_audio_format_from_string (g_value_get_string (v));
+    g_assert (all->formats[i] != GST_AUDIO_FORMAT_UNKNOWN
+        && all->formats[i] != GST_AUDIO_FORMAT_ENCODED);
+  }
+
+  g_value_unset (&list);
+
+  return all;
+}
+
+/**
+ * gst_audio_formats_raw:
+ * @len: (out): the number of elements in the returned array
+ *
+ * Return all the raw audio formats supported by GStreamer.
+ *
+ * Returns: (transfer none) (array length=len): an array of #GstAudioFormat
+ * Since: 1.18
+ */
+const GstAudioFormat *
+gst_audio_formats_raw (guint * len)
+{
+  static GOnce raw_audio_formats_once = G_ONCE_INIT;
+  struct RawAudioFormats *all;
+
+  g_return_val_if_fail (len, NULL);
+
+  g_once (&raw_audio_formats_once, generate_raw_audio_formats, NULL);
+
+  all = raw_audio_formats_once.retval;
+  *len = all->n;
+  return all->formats;
+}

diff --git a/gst-libs/gst/audio/audio-format.h b/gst-libs/gst/audio/audio-format.h
index cb0b335..36c0552 100644 (file)
--- a/gst-libs/gst/audio/audio-format.h
+++ b/gst-libs/gst/audio/audio-format.h
@@ -336,6 +336,9 @@ void           gst_audio_format_fill_silence     (const GstAudioFormatInfo *info
     "S18LE, S18BE, U18LE, U18BE, " \
     "F32LE, F32BE, F64LE, F64BE }"
 
+GST_AUDIO_API
+const GstAudioFormat * gst_audio_formats_raw (guint * len);
+
 /**
  * GST_AUDIO_CAPS_MAKE:
  * @format: string format that describes the sample layout, as string