aac: Add support for Enhanced AAC Low Delay (ER AAC ELD).

This does not include support for LD SBR, epTool, data resilience, nor
the 960 transform family.

Changelog

@@ -38,6 +38,7 @@ version 10:
 - Low Delay AAC (ER AAC LD) decoding
 - mux chapters in ASF files
 - Opus in Ogg demuxing
+- Enhanced Low Delay AAC (ER AAC ELD) decoding (no LD SBR support)
 
 
 version 9:

libavcodec/aac.h

@@ -234,7 +234,7 @@ typedef struct SingleChannelElement {
     int sf_idx[128];                                ///< scalefactor indices (used by encoder)
     uint8_t zeroes[128];                            ///< band is not coded (used by encoder)
     DECLARE_ALIGNED(32, float,   coeffs)[1024];     ///< coefficients for IMDCT
-    DECLARE_ALIGNED(32, float,   saved)[1024];      ///< overlap
+    DECLARE_ALIGNED(32, float,   saved)[1536];      ///< overlap
     DECLARE_ALIGNED(32, float,   ret_buf)[2048];    ///< PCM output buffer
     DECLARE_ALIGNED(16, float,   ltp_state)[3072];  ///< time signal for LTP
     PredictorState predictor_state[MAX_PREDICTORS];

libavcodec/aactab.h

@@ -47,6 +47,7 @@
 DECLARE_ALIGNED(32, extern float,  ff_aac_kbd_long_1024)[1024];
 DECLARE_ALIGNED(32, extern float,  ff_aac_kbd_long_512 )[512];
 DECLARE_ALIGNED(32, extern float,  ff_aac_kbd_short_128)[128];
+const DECLARE_ALIGNED(32, extern float, ff_aac_eld_window)[1920];
 // @}
 
 /* @name number of scalefactor window bands for long and short transform windows respectively

libavcodec/version.h

@@ -27,7 +27,7 @@
  */
 
 #define LIBAVCODEC_VERSION_MAJOR 55
-#define LIBAVCODEC_VERSION_MINOR 21
+#define LIBAVCODEC_VERSION_MINOR 22
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \