291   if (render->text_buffer) {  in gst_ttml_render_finalize()
292     gst_buffer_unref (render->text_buffer);  in gst_ttml_render_finalize()
293     render->text_buffer = NULL;  in gst_ttml_render_finalize()
357   render->text_buffer = NULL;  in gst_ttml_render_init()
1085   if (render->text_buffer) {  in gst_ttml_render_pop_text()
1086     GST_DEBUG_OBJECT (render, "releasing text buffer %p", render->text_buffer);  in gst_ttml_render_pop_text()
1087     gst_buffer_unref (render->text_buffer);  in gst_ttml_render_pop_text()
1088     render->text_buffer = NULL;  in gst_ttml_render_pop_text()
1152     while (render->text_buffer != NULL) {  in gst_ttml_render_text_chain()
1167     render->text_buffer = buffer;  in gst_ttml_render_text_chain()
2845   if (render->text_buffer) {  in gst_ttml_render_video_chain()
2855     if (!GST_BUFFER_TIMESTAMP_IS_VALID (render->text_buffer) ||  in gst_ttml_render_video_chain()
2856         !GST_BUFFER_DURATION_IS_VALID (render->text_buffer)) {  in gst_ttml_render_video_chain()
2862       text_start = GST_BUFFER_TIMESTAMP (render->text_buffer);  in gst_ttml_render_video_chain()
2863       text_end = text_start + GST_BUFFER_DURATION (render->text_buffer);  in gst_ttml_render_video_chain()
2912         subtitle_meta = gst_buffer_get_subtitle_meta (render->text_buffer);  in gst_ttml_render_video_chain()
2920                 render->text_buffer);  in gst_ttml_render_video_chain()