VSE: Don't store proxy images in cache

Proxies are expected to be fast to read. Storing them in cache has
little to no effect on performance.

This change also allows to omit invalidation of cache when user switch
between proxies and original media.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D9473

1 files changed, 8 insertions, 7 deletions

diff --git a/source/blender/sequencer/intern/render.c b/source/blender/sequencer/intern/render.c
index 2a11c61d137..f6d80602f4c 100644
--- a/source/blender/sequencer/intern/render.c
+++ b/source/blender/sequencer/intern/render.c
@@ -655,8 +655,7 @@ static void multibuf(ImBuf *ibuf, const float fmul)
 static ImBuf *input_preprocess(const SeqRenderData *context,
                                Sequence *seq,
                                float timeline_frame,
-                               ImBuf *ibuf,
-                               const bool UNUSED(is_proxy_image))
+                               ImBuf *ibuf)
 {
   Scene *scene = context->scene;
   ImBuf *preprocessed_ibuf = NULL;
@@ -796,9 +795,7 @@ static ImBuf *seq_render_preprocess_ibuf(const SeqRenderData *context,
   if (use_preprocess) {
     float cost = seq_estimate_render_cost_end(context->scene, begin);
 
-    /* TODO(Richard): It should be possible to store in cache if image is proxy,
-     * but it adds quite a bit of complexity. Since proxies are fast to read, I would
-     * rather simplify existing code a bit. */
+    /* Proxies are not stored in cache. */
     if (!is_proxy_image) {
       BKE_sequencer_cache_put(
           context, seq, timeline_frame, SEQ_CACHE_STORE_RAW, ibuf, cost, false);
@@ -806,7 +803,7 @@ static ImBuf *seq_render_preprocess_ibuf(const SeqRenderData *context,
 
     /* Reset timer so we can get partial render time. */
     begin = seq_estimate_render_cost_begin();
-    ibuf = input_preprocess(context, seq, timeline_frame, ibuf, is_proxy_image);
+    ibuf = input_preprocess(context, seq, timeline_frame, ibuf);
   }
 
   float cost = seq_estimate_render_cost_end(context->scene, begin);
@@ -1865,7 +1862,11 @@ ImBuf *seq_render_strip(const SeqRenderData *context,
     return ibuf;
   }
 
-  ibuf = BKE_sequencer_cache_get(context, seq, timeline_frame, SEQ_CACHE_STORE_RAW, false);
+  /* Proxies are not stored in cache. */
+  if (!SEQ_can_use_proxy(seq, SEQ_rendersize_to_proxysize(context->preview_render_size))) {
+    ibuf = BKE_sequencer_cache_get(context, seq, timeline_frame, SEQ_CACHE_STORE_RAW, false);
+  }
+
   if (ibuf == NULL) {
     ibuf = do_render_strip_uncached(context, state, seq, timeline_frame, &is_proxy_image);
   }