goto link_failed;
}
+ g_object_set (src, "emit-signals", TRUE, NULL);
+ g_object_set (sink, "emit-signals", TRUE, NULL);
+
*src_element = src;
*sink_element = sink;
*
* Returns: The converted #GstBuffer, or %NULL if an error happened (in which case @err
* will point to the #GError).
+ *
+ * Since: 0.10.31
+ *
*/
GstBuffer *
gst_video_convert_frame (GstBuffer * buf, const GstCaps * to_caps,
return NULL;
}
}
+
+typedef struct
+{
+ GMutex *mutex;
+ GstElement *pipeline;
+ GstVideoConvertFrameCallback callback;
+ gpointer user_data;
+ GMainContext *context;
+ GstBuffer *buffer;
+ gulong timeout_id;
+ gboolean finished;
+} GstVideoConvertFrameContext;
+
+typedef struct
+{
+ GstVideoConvertFrameCallback callback;
+ GstBuffer *buffer;
+ GError *error;
+ gpointer user_data;
+
+ GstVideoConvertFrameContext *context;
+} GstVideoConvertFrameCallbackContext;
+
+static void
+gst_video_convert_frame_context_free (GstVideoConvertFrameContext * ctx)
+{
+ /* Wait until all users of the mutex are done */
+ g_mutex_lock (ctx->mutex);
+ g_mutex_unlock (ctx->mutex);
+ g_mutex_free (ctx->mutex);
+ if (ctx->timeout_id)
+ g_source_remove (ctx->timeout_id);
+ if (ctx->buffer)
+ gst_buffer_unref (ctx->buffer);
+ g_main_context_unref (ctx->context);
+
+ gst_element_set_state (ctx->pipeline, GST_STATE_NULL);
+ gst_object_unref (ctx->pipeline);
+
+ g_slice_free (GstVideoConvertFrameContext, ctx);
+}
+
+static void
+ gst_video_convert_frame_callback_context_free
+ (GstVideoConvertFrameCallbackContext * ctx)
+{
+ if (ctx->context)
+ gst_video_convert_frame_context_free (ctx->context);
+ g_slice_free (GstVideoConvertFrameCallbackContext, ctx);
+}
+
+static gboolean
+convert_frame_dispatch_callback (GstVideoConvertFrameCallbackContext * ctx)
+{
+ ctx->callback (ctx->buffer, ctx->error, ctx->user_data);
+
+ return FALSE;
+}
+
+static void
+convert_frame_finish (GstVideoConvertFrameContext * context, GstBuffer * buffer,
+ GError * error)
+{
+ GSource *source;
+ GstVideoConvertFrameCallbackContext *ctx;
+
+ if (context->timeout_id)
+ g_source_remove (context->timeout_id);
+ context->timeout_id = 0;
+
+ ctx = g_slice_new (GstVideoConvertFrameCallbackContext);
+ ctx->callback = context->callback;
+ ctx->user_data = context->user_data;
+ ctx->buffer = buffer;
+ ctx->error = error;
+ ctx->context = context;
+
+ source = g_timeout_source_new (0);
+ g_source_set_callback (source,
+ (GSourceFunc) convert_frame_dispatch_callback, ctx,
+ (GDestroyNotify) gst_video_convert_frame_callback_context_free);
+ g_source_attach (source, context->context);
+ g_source_unref (source);
+
+ context->finished = TRUE;
+}
+
+static gboolean
+convert_frame_timeout_callback (GstVideoConvertFrameContext * context)
+{
+ GError *error;
+
+ g_mutex_lock (context->mutex);
+
+ if (context->finished)
+ goto done;
+
+ GST_ERROR ("Could not convert video frame: timeout");
+
+ error = g_error_new (GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
+ "Could not convert video frame: timeout");
+
+ convert_frame_finish (context, NULL, error);
+
+done:
+ g_mutex_unlock (context->mutex);
+ return FALSE;
+}
+
+static gboolean
+convert_frame_bus_callback (GstBus * bus, GstMessage * message,
+ GstVideoConvertFrameContext * context)
+{
+ g_mutex_lock (context->mutex);
+
+ if (context->finished)
+ goto done;
+
+ switch (GST_MESSAGE_TYPE (message)) {
+ case GST_MESSAGE_ERROR:{
+ GError *error;
+ gchar *dbg = NULL;
+
+ gst_message_parse_error (message, &error, &dbg);
+
+ GST_ERROR ("Could not convert video frame: %s", error->message);
+ GST_DEBUG ("%s [debug: %s]", error->message, GST_STR_NULL (dbg));
+
+ convert_frame_finish (context, NULL, error);
+
+ g_free (dbg);
+ break;
+ }
+ default:
+ break;
+ }
+
+done:
+ g_mutex_unlock (context->mutex);
+
+ return FALSE;
+}
+
+static void
+convert_frame_need_data_callback (GstElement * src, guint size,
+ GstVideoConvertFrameContext * context)
+{
+ GstFlowReturn ret = GST_FLOW_ERROR;
+ GError *error;
+
+ g_mutex_lock (context->mutex);
+
+ if (context->finished)
+ goto done;
+
+ g_signal_emit_by_name (src, "push-buffer", context->buffer, &ret);
+ gst_buffer_unref (context->buffer);
+ context->buffer = NULL;
+
+ if (ret != GST_FLOW_OK) {
+ GST_ERROR ("Could not push video frame: %s", gst_flow_get_name (ret));
+
+ error = g_error_new (GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
+ "Could not push video frame: %s", gst_flow_get_name (ret));
+
+ convert_frame_finish (context, NULL, error);
+ }
+
+ g_signal_handlers_disconnect_by_func (src, convert_frame_need_data_callback,
+ context);
+
+done:
+ g_mutex_unlock (context->mutex);
+}
+
+static void
+convert_frame_new_buffer_callback (GstElement * sink,
+ GstVideoConvertFrameContext * context)
+{
+ GstBuffer *buf = NULL;
+ GError *error = NULL;
+
+ g_mutex_lock (context->mutex);
+
+ if (context->finished)
+ goto done;
+
+ g_signal_emit_by_name (sink, "pull-preroll", &buf);
+
+ if (!buf) {
+ error = g_error_new (GST_CORE_ERROR, GST_CORE_ERROR_FAILED,
+ "Could not get converted video frame");
+ }
+
+ convert_frame_finish (context, buf, error);
+
+ g_signal_handlers_disconnect_by_func (sink, convert_frame_need_data_callback,
+ context);
+
+done:
+ g_mutex_unlock (context->mutex);
+}
+
+/**
+ * gst_video_convert_frame_async:
+ * @buf: a #GstBuffer
+ * @to_caps: the #GstCaps to convert to
+ * @timeout: the maximum amount of time allowed for the processing.
+ * @callback: %GstVideoConvertFrameCallback that will be called after conversion.
+ *
+ * Converts a raw video buffer into the specified output caps.
+ *
+ * The output caps can be any raw video formats or any image formats (jpeg, png, ...).
+ *
+ * The width, height and pixel-aspect-ratio can also be specified in the output caps.
+ *
+ * @callback will be called after conversion, when an error occured or if conversion didn't
+ * finish after @timeout. @callback will always be called from the thread default
+ * %GMainContext, see g_main_context_get_thread_default(). If GLib before 2.22 is used,
+ * this will always be the global default main context.
+ *
+ * Since: 0.10.31
+ *
+ */
+void
+gst_video_convert_frame_async (GstBuffer * buf, const GstCaps * to_caps,
+ GstClockTime timeout, GstVideoConvertFrameCallback callback,
+ gpointer user_data)
+{
+ GMainContext *context = NULL;
+ GError *error = NULL;
+ GstBus *bus;
+ GstCaps *from_caps, *to_caps_copy = NULL;
+ GstElement *pipeline, *src, *sink;
+ guint i, n;
+ GSource *source;
+ GstVideoConvertFrameContext *ctx;
+
+ g_return_if_fail (buf != NULL);
+ g_return_if_fail (to_caps != NULL);
+ g_return_if_fail (GST_BUFFER_CAPS (buf) != NULL);
+
+#if GLIB_CHECK_VERSION(2,22,0)
+ context = g_main_context_get_thread_default ();
+#endif
+ if (!context)
+ context = g_main_context_default ();
+
+ from_caps = GST_BUFFER_CAPS (buf);
+
+ to_caps_copy = gst_caps_new_empty ();
+ n = gst_caps_get_size (to_caps);
+ for (i = 0; i < n; i++) {
+ GstStructure *s = gst_caps_get_structure (to_caps, i);
+
+ s = gst_structure_copy (s);
+ gst_structure_remove_field (s, "framerate");
+ gst_caps_append_structure (to_caps_copy, s);
+ }
+
+ pipeline =
+ build_convert_frame_pipeline (&src, &sink, from_caps, to_caps_copy,
+ &error);
+ if (!pipeline)
+ goto no_pipeline;
+
+ bus = gst_element_get_bus (pipeline);
+
+ ctx = g_slice_new0 (GstVideoConvertFrameContext);
+ ctx->mutex = g_mutex_new ();
+ ctx->buffer = gst_buffer_ref (buf);
+ ctx->callback = callback;
+ ctx->user_data = user_data;
+ ctx->context = g_main_context_ref (context);
+ ctx->finished = FALSE;
+ ctx->pipeline = pipeline;
+
+ if (timeout != GST_CLOCK_TIME_NONE) {
+ source = g_timeout_source_new (timeout / GST_MSECOND);
+ g_source_set_callback (source,
+ (GSourceFunc) convert_frame_timeout_callback, ctx, NULL);
+ ctx->timeout_id = g_source_attach (source, context);
+ g_source_unref (source);
+ }
+
+ g_signal_connect (src, "need-data",
+ G_CALLBACK (convert_frame_need_data_callback), ctx);
+ g_signal_connect (sink, "new-preroll",
+ G_CALLBACK (convert_frame_new_buffer_callback), ctx);
+
+ source = gst_bus_create_watch (bus);
+ g_source_set_callback (source, (GSourceFunc) convert_frame_bus_callback,
+ ctx, NULL);
+ g_source_attach (source, context);
+ g_source_unref (source);
+
+ gst_element_set_state (pipeline, GST_STATE_PLAYING);
+
+ gst_object_unref (bus);
+ gst_caps_unref (to_caps_copy);
+
+ return;
+ /* ERRORS */
+no_pipeline:
+ {
+ GstVideoConvertFrameCallbackContext *ctx;
+ GSource *source;
+
+ gst_caps_unref (to_caps_copy);
+
+ ctx = g_slice_new0 (GstVideoConvertFrameCallbackContext);
+ ctx->callback = callback;
+ ctx->user_data = user_data;
+ ctx->buffer = NULL;
+ ctx->error = error;
+
+ source = g_timeout_source_new (0);
+ g_source_set_callback (source,
+ (GSourceFunc) convert_frame_dispatch_callback, ctx,
+ (GDestroyNotify) gst_video_convert_frame_callback_context_free);
+ g_source_attach (source, context);
+ g_source_unref (source);
+ }
+}
projects / platform / upstream / gst-plugins-base.git / commitdiff