checkasm: add av_tx FFT SIMD testing code

This sadly required making changes to the code itself,
due to the same context needing to be reused for both versions.
The lookup table had to be duplicated for both versions.

1 files changed, 4 insertions, 1 deletions

diff --git a/libavutil/tx_priv.h b/libavutil/tx_priv.h
index b889f6d3b4..88589fcbb4 100644
--- a/libavutil/tx_priv.h
+++ b/libavutil/tx_priv.h
@@ -122,6 +122,9 @@ struct AVTXContext {
     int        *revtab; /* Input mapping for power of two transforms */
     int   *inplace_idx; /* Required indices to revtab for in-place transforms */
 
+    int      *revtab_c; /* Revtab for only the C transforms, needed because
+                         * checkasm makes us reuse the same context. */
+
     av_tx_fn    top_tx; /* Used for computing transforms derived from other
                          * transforms, like full-length iMDCTs and RDFTs.
                          * NOTE: Do NOT use this to mix assembly with C code. */
@@ -147,7 +150,7 @@ int ff_tx_gen_ptwo_revtab(AVTXContext *s, int invert_lookup);
  * specific order,  allows the revtab to be done in-place. AVTXContext->revtab
  * must already exist.
  */
-int ff_tx_gen_ptwo_inplace_revtab_idx(AVTXContext *s);
+int ff_tx_gen_ptwo_inplace_revtab_idx(AVTXContext *s, int *revtab);
 
 /*
  * This generates a parity-based revtab of length len and direction inv.