ac3dec: avoid pointless alloc and indirection for input_buffer

Since we now always allocate it, it can simply be made part of the context
instead.

1 files changed, 4 insertions, 1 deletions

diff --git a/libavcodec/ac3dec.h b/libavcodec/ac3dec.h
index 3e0afcded0..91008e5c8f 100644
--- a/libavcodec/ac3dec.h
+++ b/libavcodec/ac3dec.h
@@ -67,10 +67,12 @@
 
 #define SPX_MAX_BANDS    17
 
+/** Large enough for maximum possible frame size when the specification limit is ignored */
+#define AC3_FRAME_BUFFER_SIZE 32768
+
 typedef struct {
     AVCodecContext *avctx;                  ///< parent context
     GetBitContext gbc;                      ///< bitstream reader
-    uint8_t *input_buffer;                  ///< temp buffer to prevent overread
 
 ///@defgroup bsi bit stream information
 ///@{
@@ -205,6 +207,7 @@ typedef struct {
     DECLARE_ALIGNED(16, float, window)[AC3_BLOCK_SIZE];                              ///< window coefficients
     DECLARE_ALIGNED(16, float, tmp_output)[AC3_BLOCK_SIZE];                          ///< temporary storage for output before windowing
     DECLARE_ALIGNED(16, float, output)[AC3_MAX_CHANNELS][AC3_BLOCK_SIZE];            ///< output after imdct transform and windowing
+    DECLARE_ALIGNED(16, uint8_t, input_buffer)[AC3_FRAME_BUFFER_SIZE + FF_INPUT_BUFFER_PADDING_SIZE]; ///< temp buffer to prevent overread
 ///@}
 } AC3DecodeContext;