vaapi: don't unmap non-existing buffer

Some h264's can end up calling ff_vaapi_render_picture after a seek with no buffer allocated and vaUnmapBuffer will assert on a invalid buffer.
pieh · May 22, 2013 · c159743 · c159743
1 parent cc0c525
commit c159743
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/lib/ffmpeg/libavcodec/vaapi.c b/lib/ffmpeg/libavcodec/vaapi.c
@@ -46,8 +46,10 @@ int ff_vaapi_render_picture(struct vaapi_context *vactx, VASurfaceID surface)
     VABufferID va_buffers[3];
     unsigned int n_va_buffers = 0;
 
+    if (vactx->pic_param_buf_id)
     vaUnmapBuffer(vactx->display, vactx->pic_param_buf_id);
     va_buffers[n_va_buffers++] = vactx->pic_param_buf_id;
+    }
 
     if (vactx->iq_matrix_buf_id) {
         vaUnmapBuffer(vactx->display, vactx->iq_matrix_buf_id);