apv_decode: expose the current frame header

We need to know the quantization matrix.

libavcodec/apv_decode.c

@@ -375,6 +375,7 @@ static int apv_decode(AVCodecContext *avctx, AVFrame *output,
     if (err < 0)
         return err;
 
+    apv->cur_raw_frame = input;
     apv->output_frame = output;
     atomic_store_explicit(&apv->tile_errors, 0, memory_order_relaxed);
 

libavcodec/apv_decode.h

@@ -24,6 +24,7 @@
 
 #include "apv.h"
 #include "apv_dsp.h"
+#include "cbs_apv.h"
 
 #include "cbs.h"
 #include "get_bits.h"
@@ -100,6 +101,7 @@ typedef struct APVDecodeContext {
 
     CodedBitstreamFragment au;
     APVDerivedTileInfo tile_info;
+    APVRawFrame *cur_raw_frame;
 
     AVPacket *pkt;
     AVFrame *output_frame;