Changeset 37 for libmpcdec/trunk/include/mpcdec/decoder.h

Timestamp:

09/22/06 22:00:44 (18 years ago)

Author:

zorg

Message:

Added optional fast seeking, seek table index & various code cleanup. Patch by Nicolas BOTTI

File:

• libmpcdec/trunk/include/mpcdec/decoder.h (modified) (4 diffs)

libmpcdec/trunk/include/mpcdec/decoder.h

@@ -46 +46 @@
 #define MPC_SUPPORT_SV456
 
+#define SEEKING_TABLE_SIZE  256
+// set it to SLOW_SEEKING_WINDOW to not use fast seeking
+#define FAST_SEEKING_WINDOW 32
+// set it to FAST_SEEKING_WINDOW to only use fast seeking
+#define SLOW_SEEKING_WINDOW 0x80000000
+
 enum {
     MPC_V_MEM = 2304,
@@ -69 +75 @@
     mpc_uint32_t  samples_to_skip;
 
-    mpc_uint32_t  FwdJumpInfo;
-    mpc_uint32_t  ActDecodePos;
-    
-
     mpc_uint32_t  DecodedFrames;
     mpc_uint32_t  OverallFrames;
@@ -91 +93 @@
     mpc_uint32_t  __r2; 
 
+    // seeking
+    mpc_uint32_t  seeking_table[SEEKING_TABLE_SIZE];
+    mpc_uint32_t  seeking_pwr;                // distance between 2 frames in seeking_table = 2^seeking_pwr
+    mpc_uint32_t  seeking_table_frames;       // last frame in seaking table
+    mpc_uint32_t  seeking_window;             // number of frames to look for scalefactors
+
     mpc_int32_t   SCF_Index_L [32] [3];
     mpc_int32_t   SCF_Index_R [32] [3];       // holds scalefactor-indices
@@ -100 +108 @@
     mpc_int32_t   SCFI_L [32];
     mpc_int32_t   SCFI_R [32];                // describes order of transmitted SCF
-    mpc_int32_t   DSCF_Reference_L [32];
-    mpc_int32_t   DSCF_Reference_R [32];      // holds last frames SCF
     mpc_bool_t    MS_Flag[32];                // MS used?
 #ifdef MPC_FIXED_POINT