libfaad: Move PS related variables to sbr_info struct. This allows dynamic allocation including error handling.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29857 a1c6a512-1295-4272-9138-f99709370657

apps/codecs/libfaad/ps_dec.c

@@ -145,26 +145,10 @@ static const uint16_t map_group2bk34[32+18] =
     16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33
 };
 
-/* type definitions */
-typedef struct
-{
-    uint8_t frame_len;
-    uint8_t resolution20[3];
-    uint8_t resolution34[5];
-
-    qmf_t work[32+12];
-    qmf_t buffer[5][32];
-    qmf_t temp[32][12];
-} hyb_info;
-
-
-/* static variables */
-static hyb_info s_hyb_info;
-static ps_info s_ps_info;
 
 /* static function declarations */
 static void ps_data_decode(ps_info *ps);
-static hyb_info *hybrid_init(void);
+static void hybrid_init(hyb_info *hyb);
 static void channel_filter2(hyb_info *hyb, uint8_t frame_len, const real_t *filter,
                             qmf_t *buffer, qmf_t X_hybrid[32][12]);
 static INLINE void DCT3_4_unscaled(real_t *y, real_t *x);
@@ -200,10 +184,8 @@ static void ps_mix_phase(ps_info *ps,
 /*  */
 
 
-static hyb_info *hybrid_init()
+static void hybrid_init(hyb_info *hyb)
 {
-    hyb_info *hyb = &s_hyb_info;
-
     hyb->resolution34[0] = 12;
     hyb->resolution34[1] = 8;
     hyb->resolution34[2] = 4;
@@ -219,8 +201,6 @@ static hyb_info *hybrid_init()
     memset(hyb->work  , 0, sizeof(hyb->work));
     memset(hyb->buffer, 0, sizeof(hyb->buffer));
     memset(hyb->temp  , 0, sizeof(hyb->temp));
-
-    return hyb;
 }
 
 /* real filter, size 2 */
@@ -1815,16 +1795,12 @@ static void ps_mix_phase(ps_info *ps,
     }
 }
 
-ps_info *ps_init(uint8_t sr_index)
+void ps_init(ps_info *ps)
 {
     uint8_t i;
     uint8_t short_delay_band;
 
-    ps_info *ps = &s_ps_info;
+    hybrid_init(&ps->hyb);
-    memset(ps, 0, sizeof(ps_info));
-
-    (void)sr_index;
-    ps->hyb = hybrid_init();
 
     ps->ps_data_available = 0;
 
@@ -1905,8 +1881,6 @@ ps_info *ps_init(uint8_t sr_index)
         RE(ps->opd_prev[i][1]) = 0;
         IM(ps->opd_prev[i][1]) = 0;
     }
-
-    return ps;
 }
 
 /* main Parametric Stereo decoding function */
@@ -1944,8 +1918,7 @@ uint8_t ps_decode(ps_info *ps,
     /* Perform further analysis on the lowest subbands to get a higher
      * frequency resolution
      */
-    hybrid_analysis((hyb_info*)ps->hyb, X_left, X_hybrid_left,
+    hybrid_analysis(&ps->hyb, X_left, X_hybrid_left, ps->use34hybrid_bands);
-        ps->use34hybrid_bands);
 
     /* decorrelate mono signal */
     ps_decorrelate(ps, X_left, X_right, X_hybrid_left, X_hybrid_right);
@@ -1954,11 +1927,9 @@ uint8_t ps_decode(ps_info *ps,
     ps_mix_phase(ps, X_left, X_right, X_hybrid_left, X_hybrid_right);
 
     /* hybrid synthesis, to rebuild the SBR QMF matrices */
-    hybrid_synthesis((hyb_info*)ps->hyb, X_left, X_hybrid_left,
+    hybrid_synthesis(&ps->hyb, X_left, X_hybrid_left, ps->use34hybrid_bands);
-        ps->use34hybrid_bands);
 
-    hybrid_synthesis((hyb_info*)ps->hyb, X_right, X_hybrid_right,
+    hybrid_synthesis(&ps->hyb, X_right, X_hybrid_right, ps->use34hybrid_bands);
-        ps->use34hybrid_bands);
 
     return 0;
 }

apps/codecs/libfaad/ps_dec.h

@@ -41,6 +41,17 @@ extern "C" {
 
 #define MAX_NTSRPS  38 /* max number_time_slots * rate + 6 (delay) */
 
+typedef struct
+{
+    uint8_t frame_len;
+    uint8_t resolution20[3];
+    uint8_t resolution34[5];
+
+    qmf_t work[32+12];
+    qmf_t buffer[5][32];
+    qmf_t temp[32][12];
+} hyb_info;
+
 typedef struct
 {
     /* bitstream parameters */
@@ -89,7 +100,7 @@ typedef struct
     uint8_t header_read;
 
     /* hybrid filterbank parameters */
-    void *hyb;
+    hyb_info hyb;
     uint8_t use34hybrid_bands;
 
     /**/
@@ -137,7 +148,7 @@ typedef struct
 uint16_t ps_data(ps_info *ps, bitfile *ld, uint8_t *header);
 
 /* ps_dec.c */
-ps_info *ps_init(uint8_t sr_index);
+void ps_init(ps_info *ps);
 
 uint8_t ps_decode(ps_info *ps, 
                   qmf_t X_left[MAX_NTSRPS][64], 

apps/codecs/libfaad/sbr_dec.c

@@ -95,6 +95,9 @@ sbr_info *sbrDecodeInit(uint16_t framelength, uint8_t id_aac, uint8_t id_ele,
 #endif
     memset(sbr, 0, sizeof(sbr_info));
     
+    /* initialize PS variables */
+    ps_init(&sbr->ps);
+    
     /* Allocate XLR temporary variable. Use static allocation if either 
      * FAAD_STATIC_ALLOC is set or XLR fits to IRAM. */
 #if defined(FAAD_STATIC_ALLOC) || defined(FAAD_HAVE_XLR_IN_IRAM)
@@ -556,7 +559,7 @@ uint8_t sbrDecodeSingleFramePS(sbr_info *sbr, real_t *left_channel, real_t *righ
     } else {
 #endif
 #ifdef PS_DEC
-        ps_decode(sbr->ps, p_XLR->X_L, p_XLR->X_R);
+        ps_decode(&sbr->ps, p_XLR->X_L, p_XLR->X_R);
 #endif
 #ifdef DRM_PS
     }

apps/codecs/libfaad/sbr_dec.h

@@ -176,7 +176,7 @@ typedef struct
     uint8_t tHFAdj;
 
 #ifdef PS_DEC
-    ps_info *ps;
+    ps_info ps;
 #endif
 #if (defined(PS_DEC) || defined(DRM_PS))
     uint8_t ps_used;

apps/codecs/libfaad/sbr_syntax.c

@@ -826,11 +826,7 @@ static uint16_t sbr_extension(bitfile *ld, sbr_info *sbr,
     {
 #ifdef PS_DEC
     case EXTENSION_ID_PS:
-        if (!sbr->ps)
+        ret = ps_data(&sbr->ps, ld, &header);
-        {
-            sbr->ps = ps_init(get_sr_index(sbr->sample_rate));
-        }
-        ret = ps_data(sbr->ps, ld, &header);
 
         /* enable PS if and only if: a header has been decoded */
         if (sbr->ps_used == 0 && header == 1)