intrax8: K&R formatting cosmetics

1 files changed, 540 insertions, 480 deletions

diff --git a/libavcodec/intrax8.c b/libavcodec/intrax8.c
index 3e627161aa..cbcf9aa159 100644
--- a/libavcodec/intrax8.c
+++ b/libavcodec/intrax8.c
@@ -30,7 +30,8 @@
 #include "intrax8.h"
 #include "intrax8dsp.h"
 
-#define MAX_TABLE_DEPTH(table_bits, max_bits) ((max_bits+table_bits-1)/table_bits)
+#define MAX_TABLE_DEPTH(table_bits, max_bits) \
+    ((max_bits + table_bits - 1) / table_bits)
 
 #define DC_VLC_BITS 9
 #define AC_VLC_BITS 9
@@ -40,15 +41,16 @@
 #define AC_VLC_MTD MAX_TABLE_DEPTH(AC_VLC_BITS, MAX_AC_VLC_BITS)
 #define OR_VLC_MTD MAX_TABLE_DEPTH(OR_VLC_BITS, MAX_OR_VLC_BITS)
 
-static VLC j_ac_vlc[2][2][8];  //[quant<13],[intra/inter],[select]
-static VLC j_dc_vlc[2][8];     //[quant], [select]
-static VLC j_orient_vlc[2][4]; //[quant], [select]
+static VLC j_ac_vlc[2][2][8];  // [quant < 13], [intra / inter], [select]
+static VLC j_dc_vlc[2][8];     // [quant], [select]
+static VLC j_orient_vlc[2][4]; // [quant], [select]
 
-static av_cold void x8_vlc_init(void){
+static av_cold void x8_vlc_init(void)
+{
     int i;
     int offset = 0;
     int sizeidx = 0;
-    static const uint16_t sizes[8*4 + 8*2 + 2 + 4] = {
+    static const uint16_t sizes[8 * 4 + 8 * 2 + 2 + 4] = {
         576, 548, 582, 618, 546, 616, 560, 642,
         584, 582, 704, 664, 512, 544, 656, 640,
         512, 648, 582, 566, 532, 614, 596, 648,
@@ -57,95 +59,97 @@ static av_cold void x8_vlc_init(void){
         528, 528, 526, 528, 536, 528, 526, 544,
         544, 512, 512, 528, 528, 544, 512, 544,
 
-        128, 128, 128, 128, 128, 128};
+        128, 128, 128, 128, 128, 128,
+    };
 
     static VLC_TYPE table[28150][2];
 
-#define  init_ac_vlc(dst,src) do { \
-    dst.table = &table[offset]; \
-    dst.table_allocated = sizes[sizeidx]; \
-    offset += sizes[sizeidx++]; \
-       init_vlc(&dst, \
-              AC_VLC_BITS,77, \
-              &src[1],4,2, \
-              &src[0],4,2, \
-              INIT_VLC_USE_NEW_STATIC); \
+// set ac tables
+#define init_ac_vlc(dst, src)                                                 \
+    do {                                                                      \
+        dst.table           = &table[offset];                                 \
+        dst.table_allocated = sizes[sizeidx];                                 \
+        offset             += sizes[sizeidx++];                               \
+        init_vlc(&dst, AC_VLC_BITS, 77, &src[1], 4, 2, &src[0], 4, 2,         \
+                 INIT_VLC_USE_NEW_STATIC);                                    \
     } while(0)
-//set ac tables
-    for(i=0;i<8;i++){
-        init_ac_vlc( j_ac_vlc[0][0][i], x8_ac0_highquant_table[i][0] );
-        init_ac_vlc( j_ac_vlc[0][1][i], x8_ac1_highquant_table[i][0] );
-        init_ac_vlc( j_ac_vlc[1][0][i], x8_ac0_lowquant_table [i][0] );
-        init_ac_vlc( j_ac_vlc[1][1][i], x8_ac1_lowquant_table [i][0] );
+
+    for (i = 0; i < 8; i++) {
+        init_ac_vlc(j_ac_vlc[0][0][i], x8_ac0_highquant_table[i][0]);
+        init_ac_vlc(j_ac_vlc[0][1][i], x8_ac1_highquant_table[i][0]);
+        init_ac_vlc(j_ac_vlc[1][0][i], x8_ac0_lowquant_table[i][0]);
+        init_ac_vlc(j_ac_vlc[1][1][i], x8_ac1_lowquant_table[i][0]);
     }
 #undef init_ac_vlc
 
-//set dc tables
-#define init_dc_vlc(dst,src) do { \
-    dst.table = &table[offset]; \
-    dst.table_allocated = sizes[sizeidx]; \
-    offset += sizes[sizeidx++]; \
-        init_vlc(&dst, \
-        DC_VLC_BITS,34, \
-        &src[1],4,2, \
-        &src[0],4,2, \
-        INIT_VLC_USE_NEW_STATIC); \
+// set dc tables
+#define init_dc_vlc(dst, src)                                                 \
+    do {                                                                      \
+        dst.table           = &table[offset];                                 \
+        dst.table_allocated = sizes[sizeidx];                                 \
+        offset             += sizes[sizeidx++];                               \
+        init_vlc(&dst, DC_VLC_BITS, 34, &src[1], 4, 2, &src[0], 4, 2,         \
+                 INIT_VLC_USE_NEW_STATIC);                                    \
     } while(0)
-    for(i=0;i<8;i++){
-        init_dc_vlc( j_dc_vlc[0][i], x8_dc_highquant_table[i][0]);
-        init_dc_vlc( j_dc_vlc[1][i], x8_dc_lowquant_table [i][0]);
+
+    for (i = 0; i < 8; i++) {
+        init_dc_vlc(j_dc_vlc[0][i], x8_dc_highquant_table[i][0]);
+        init_dc_vlc(j_dc_vlc[1][i], x8_dc_lowquant_table[i][0]);
     }
 #undef init_dc_vlc
 
-//set orient tables
-#define init_or_vlc(dst,src) do { \
-    dst.table = &table[offset]; \
-    dst.table_allocated = sizes[sizeidx]; \
-    offset += sizes[sizeidx++]; \
-    init_vlc(&dst, \
-    OR_VLC_BITS,12, \
-    &src[1],4,2, \
-    &src[0],4,2, \
-    INIT_VLC_USE_NEW_STATIC); \
+// set orient tables
+#define init_or_vlc(dst, src)                                                 \
+    do {                                                                      \
+        dst.table           = &table[offset];                                 \
+        dst.table_allocated = sizes[sizeidx];                                 \
+        offset             += sizes[sizeidx++];                               \
+        init_vlc(&dst, OR_VLC_BITS, 12, &src[1], 4, 2, &src[0], 4, 2,         \
+                 INIT_VLC_USE_NEW_STATIC);                                    \
     } while(0)
-    for(i=0;i<2;i++){
-        init_or_vlc( j_orient_vlc[0][i], x8_orient_highquant_table[i][0]);
-    }
-    for(i=0;i<4;i++){
-        init_or_vlc( j_orient_vlc[1][i], x8_orient_lowquant_table [i][0]);
-    }
+
+    for (i = 0; i < 2; i++)
+        init_or_vlc(j_orient_vlc[0][i], x8_orient_highquant_table[i][0]);
+    for (i = 0; i < 4; i++)
+        init_or_vlc(j_orient_vlc[1][i], x8_orient_lowquant_table[i][0]);
+#undef init_or_vlc
+
     if (offset != sizeof(table)/sizeof(VLC_TYPE)/2)
         av_log(NULL, AV_LOG_ERROR, "table size %zd does not match needed %i\n",
                sizeof(table) / sizeof(VLC_TYPE) / 2, offset);
 }
-#undef init_or_vlc
 
-static void x8_reset_vlc_tables(IntraX8Context * w){
-    memset(w->j_dc_vlc,0,sizeof(w->j_dc_vlc));
-    memset(w->j_ac_vlc,0,sizeof(w->j_ac_vlc));
-    w->j_orient_vlc=NULL;
+static void x8_reset_vlc_tables(IntraX8Context *w)
+{
+    memset(w->j_dc_vlc, 0, sizeof(w->j_dc_vlc));
+    memset(w->j_ac_vlc, 0, sizeof(w->j_ac_vlc));
+    w->j_orient_vlc = NULL;
 }
 
-static inline void x8_select_ac_table(IntraX8Context * const w , int mode){
-    MpegEncContext * const s= w->s;
+static inline void x8_select_ac_table(IntraX8Context *const w, int mode)
+{
+    MpegEncContext *const s = w->s;
     int table_index;
 
-    assert(mode<4);
+    assert(mode < 4);
 
-    if( w->j_ac_vlc[mode] ) return;
+    if (w->j_ac_vlc[mode])
+        return;
+
+    table_index       = get_bits(&s->gb, 3);
+    // 2 modes use same tables
+    w->j_ac_vlc[mode] = &j_ac_vlc[w->quant < 13][mode >> 1][table_index];
 
-    table_index = get_bits(&s->gb, 3);
-    w->j_ac_vlc[mode] = &j_ac_vlc[w->quant<13][mode>>1][table_index];//2 modes use same tables
     assert(w->j_ac_vlc[mode]);
 }
 
-static inline int x8_get_orient_vlc(IntraX8Context * w){
-    MpegEncContext * const s= w->s;
-    int table_index;
+static inline int x8_get_orient_vlc(IntraX8Context *w)
+{
+    MpegEncContext *const s = w->s;
 
-    if(!w->j_orient_vlc ){
-        table_index = get_bits(&s->gb, 1+(w->quant<13) );
-        w->j_orient_vlc = &j_orient_vlc[w->quant<13][table_index];
+    if (!w->j_orient_vlc) {
+        int table_index = get_bits(&s->gb, 1 + (w->quant < 13));
+        w->j_orient_vlc = &j_orient_vlc[w->quant < 13][table_index];
     }
     assert(w->j_orient_vlc);
     assert(w->j_orient_vlc->table);
@@ -158,41 +162,41 @@ static inline int x8_get_orient_vlc(IntraX8Context * w){
 #define extra_level     (0x00 << 8) // 1 bit
 #define run_offset(r)   ((r) << 16) // 6 bits
 #define level_offset(l) ((l) << 24) // 5 bits
-static const uint32_t ac_decode_table[]={
-    /*46*/ extra_bits(3) |  extra_run  | run_offset(16) | level_offset( 0),
-    /*47*/ extra_bits(3) |  extra_run  | run_offset(24) | level_offset( 0),
-    /*48*/ extra_bits(2) |  extra_run  | run_offset( 4) | level_offset( 1),
-    /*49*/ extra_bits(3) |  extra_run  | run_offset( 8) | level_offset( 1),
-
-    /*50*/ extra_bits(5) |  extra_run  | run_offset(32) | level_offset( 0),
-    /*51*/ extra_bits(4) |  extra_run  | run_offset(16) | level_offset( 1),
-
-    /*52*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 4),
-    /*53*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 8),
-    /*54*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset(12),
-    /*55*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset(16),
-    /*56*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset(24),
-
-    /*57*/ extra_bits(2) | extra_level | run_offset( 1) | level_offset( 3),
-    /*58*/ extra_bits(3) | extra_level | run_offset( 1) | level_offset( 7),
-
-    /*59*/ extra_bits(2) |  extra_run  | run_offset(16) | level_offset( 0),
-    /*60*/ extra_bits(2) |  extra_run  | run_offset(20) | level_offset( 0),
-    /*61*/ extra_bits(2) |  extra_run  | run_offset(24) | level_offset( 0),
-    /*62*/ extra_bits(2) |  extra_run  | run_offset(28) | level_offset( 0),
-    /*63*/ extra_bits(4) |  extra_run  | run_offset(32) | level_offset( 0),
-    /*64*/ extra_bits(4) |  extra_run  | run_offset(48) | level_offset( 0),
-
-    /*65*/ extra_bits(2) |  extra_run  | run_offset( 4) | level_offset( 1),
-    /*66*/ extra_bits(3) |  extra_run  | run_offset( 8) | level_offset( 1),
-    /*67*/ extra_bits(4) |  extra_run  | run_offset(16) | level_offset( 1),
-
-    /*68*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 4),
-    /*69*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset( 8),
-    /*70*/ extra_bits(4) | extra_level | run_offset( 0) | level_offset(16),
-
-    /*71*/ extra_bits(2) | extra_level | run_offset( 1) | level_offset( 3),
-    /*72*/ extra_bits(3) | extra_level | run_offset( 1) | level_offset( 7),
+static const uint32_t ac_decode_table[] = {
+    /* 46 */ extra_bits(3) | extra_run   | run_offset(16) | level_offset(0),
+    /* 47 */ extra_bits(3) | extra_run   | run_offset(24) | level_offset(0),
+    /* 48 */ extra_bits(2) | extra_run   | run_offset(4)  | level_offset(1),
+    /* 49 */ extra_bits(3) | extra_run   | run_offset(8)  | level_offset(1),
+
+    /* 50 */ extra_bits(5) | extra_run   | run_offset(32) | level_offset(0),
+    /* 51 */ extra_bits(4) | extra_run   | run_offset(16) | level_offset(1),
+
+    /* 52 */ extra_bits(2) | extra_level | run_offset(0)  | level_offset(4),
+    /* 53 */ extra_bits(2) | extra_level | run_offset(0)  | level_offset(8),
+    /* 54 */ extra_bits(2) | extra_level | run_offset(0)  | level_offset(12),
+    /* 55 */ extra_bits(3) | extra_level | run_offset(0)  | level_offset(16),
+    /* 56 */ extra_bits(3) | extra_level | run_offset(0)  | level_offset(24),
+
+    /* 57 */ extra_bits(2) | extra_level | run_offset(1)  | level_offset(3),
+    /* 58 */ extra_bits(3) | extra_level | run_offset(1)  | level_offset(7),
+
+    /* 59 */ extra_bits(2) | extra_run   | run_offset(16) | level_offset(0),
+    /* 60 */ extra_bits(2) | extra_run   | run_offset(20) | level_offset(0),
+    /* 61 */ extra_bits(2) | extra_run   | run_offset(24) | level_offset(0),
+    /* 62 */ extra_bits(2) | extra_run   | run_offset(28) | level_offset(0),
+    /* 63 */ extra_bits(4) | extra_run   | run_offset(32) | level_offset(0),
+    /* 64 */ extra_bits(4) | extra_run   | run_offset(48) | level_offset(0),
+
+    /* 65 */ extra_bits(2) | extra_run   | run_offset(4)  | level_offset(1),
+    /* 66 */ extra_bits(3) | extra_run   | run_offset(8)  | level_offset(1),
+    /* 67 */ extra_bits(4) | extra_run   | run_offset(16) | level_offset(1),
+
+    /* 68 */ extra_bits(2) | extra_level | run_offset(0)  | level_offset(4),
+    /* 69 */ extra_bits(3) | extra_level | run_offset(0)  | level_offset(8),
+    /* 70 */ extra_bits(4) | extra_level | run_offset(0)  | level_offset(16),
+
+    /* 71 */ extra_bits(2) | extra_level | run_offset(1)  | level_offset(3),
+    /* 72 */ extra_bits(3) | extra_level | run_offset(1)  | level_offset(7),
 };
 #undef extra_bits
 #undef extra_run
@@ -200,308 +204,349 @@ static const uint32_t ac_decode_table[]={
 #undef run_offset
 #undef level_offset
 
-static void x8_get_ac_rlf(IntraX8Context * const w, const int mode,
-                     int * const run, int * const level, int * const final){
-    MpegEncContext *  const s= w->s;
-    int i,e;
+static void x8_get_ac_rlf(IntraX8Context *const w, const int mode,
+                          int *const run, int *const level, int *const final)
+{
+    MpegEncContext *const s = w->s;
+    int i, e;
 
-//    x8_select_ac_table(w,mode);
+//    x8_select_ac_table(w, mode);
     i = get_vlc2(&s->gb, w->j_ac_vlc[mode]->table, AC_VLC_BITS, AC_VLC_MTD);
 
-    if(i<46){ //[0-45]
-        int t,l;
-        if(i<0){
-            (*level)=(*final)=//prevent 'may be used unilitialized'
-            (*run)=64;//this would cause error exit in the ac loop
+    if (i < 46) { // [0-45]
+        int t, l;
+        if (i < 0) {
+            (*level) =
+            (*final) =      // prevent 'may be used unilitialized'
+            (*run)   = 64;  // this would cause error exit in the ac loop
             return;
         }
 
-        (*final) = t = (i>22);
-        i-=23*t;
-/*
-  i== 0-15 r=0-15 l=0 ;r=i& %01111
-  i==16-19 r=0-3  l=1 ;r=i& %00011
-  i==20-21 r=0-1  l=2 ;r=i& %00001
-  i==22    r=0    l=3 ;r=i& %00000
-l=lut_l[i/2]={0,0,0,0,0,0,0,0,1,1,2,3}[i>>1];// 11 10'01 01'00 00'00 00'00 00'00 00 => 0xE50000
-t=lut_mask[l]={0x0f,0x03,0x01,0x00}[l]; as i<256 the higher bits do not matter */
-        l=(0xE50000>>(i&(0x1E)))&3;/*0x1E or (~1) or ((i>>1)<<1)*/
-        t=(0x01030F>>(l<<3));
-
-        (*run)   = i&t;
+        /*
+         * i == 0-15  r = 0-15 l = 0; r = i & %01111
+         * i == 16-19 r = 0-3  l = 1; r = i & %00011
+         * i == 20-21 r = 0-1  l = 2; r = i & %00001
+         * i == 22    r = 0    l = 3; r = i & %00000
+         */
+
+        (*final) =
+        t        = (i > 22);
+        i       -= 23 * t;
+
+        /* l = lut_l[i / 2] = { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3 }[i >> 1];
+         *     11 10'01 01'00 00'00 00'00 00'00 00 => 0xE50000 */
+        l = (0xE50000 >> (i & (0x1E))) & 3; // 0x1E or (~1) or ((i >> 1) << 1)
+
+        /* t = lut_mask[l] = { 0x0f, 0x03, 0x01, 0x00 }[l];
+         *     as i < 256 the higher bits do not matter */
+        t = (0x01030F >> (l << 3));
+
+        (*run)   = i & t;
         (*level) = l;
-    }else if(i<73){//[46-72]
+    } else if (i < 73) { // [46-72]
         uint32_t sm;
         uint32_t mask;
 
-        i-=46;
-        sm=ac_decode_table[i];
-
-        e=get_bits(&s->gb,sm&0xF);sm>>=8;//3bits
-        mask=sm&0xff;sm>>=8;             //1bit
-
-        (*run)  =(sm&0xff) + (e&( mask));//6bits
-        (*level)=(sm>>8)   + (e&(~mask));//5bits
-        (*final)=i>(58-46);
-    }else if(i<75){//[73-74]
-        static const uint8_t crazy_mix_runlevel[32]={
-        0x22,0x32,0x33,0x53,0x23,0x42,0x43,0x63,
-        0x24,0x52,0x34,0x73,0x25,0x62,0x44,0x83,
-        0x26,0x72,0x35,0x54,0x27,0x82,0x45,0x64,
-        0x28,0x92,0x36,0x74,0x29,0xa2,0x46,0x84};
-
-        (*final)=!(i&1);
-        e=get_bits(&s->gb,5);//get the extra bits
-        (*run)  =crazy_mix_runlevel[e]>>4;
-        (*level)=crazy_mix_runlevel[e]&0x0F;
-    }else{
-        (*level)=get_bits( &s->gb, 7-3*(i&1));
-        (*run)  =get_bits( &s->gb, 6);
-        (*final)=get_bits1(&s->gb);
+        i -= 46;
+        sm = ac_decode_table[i];
+
+        e    = get_bits(&s->gb, sm & 0xF);
+        sm >>= 8;                               // 3bits
+        mask = sm & 0xff;
+        sm >>= 8;                               // 1bit
+
+        (*run)   = (sm & 0xff) + (e & (mask));  // 6bits
+        (*level) = (sm >> 8)   + (e & (~mask)); // 5bits
+        (*final) = i > (58 - 46);
+    } else if (i < 75) { // [73-74]
+        static const uint8_t crazy_mix_runlevel[32] = {
+            0x22, 0x32, 0x33, 0x53, 0x23, 0x42, 0x43, 0x63,
+            0x24, 0x52, 0x34, 0x73, 0x25, 0x62, 0x44, 0x83,
+            0x26, 0x72, 0x35, 0x54, 0x27, 0x82, 0x45, 0x64,
+            0x28, 0x92, 0x36, 0x74, 0x29, 0xa2, 0x46, 0x84,
+        };
+
+        (*final) = !(i & 1);
+        e        = get_bits(&s->gb, 5); // get the extra bits
+        (*run)   = crazy_mix_runlevel[e] >> 4;
+        (*level) = crazy_mix_runlevel[e] & 0x0F;
+    } else {
+        (*level) = get_bits(&s->gb, 7 - 3 * (i & 1));
+        (*run)   = get_bits(&s->gb, 6);
+        (*final) = get_bits1(&s->gb);
     }
     return;
 }
 
-//static const uint8_t dc_extra_sbits[]   ={0, 1,1, 1,1, 2,2, 3,3,   4,4,   5,5,   6,6,    7,7    };
-static const uint8_t dc_index_offset[]  ={ 0, 1,2, 3,4, 5,7, 9,13, 17,25, 33,49, 65,97, 129,193};
-
-static int x8_get_dc_rlf(IntraX8Context * const w,int const mode, int * const level, int * const final){
-    MpegEncContext * const s= w->s;
-    int i,e,c;
+/* static const uint8_t dc_extra_sbits[] = {
+ *     0, 1, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7,
+ * }; */
+static const uint8_t dc_index_offset[] = {
+    0, 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
+};
 
-    assert(mode<3);
-    if( !w->j_dc_vlc[mode] ) {
-        int table_index;
-        table_index = get_bits(&s->gb, 3);
-        //4 modes, same table
-        w->j_dc_vlc[mode]= &j_dc_vlc[w->quant<13][table_index];
+static int x8_get_dc_rlf(IntraX8Context *const w,
+                         int const mode, int *const level, int *const final)
+{
+    MpegEncContext *const s = w->s;
+    int i, e, c;
+
+    assert(mode < 3);
+    if (!w->j_dc_vlc[mode]) {
+        int table_index = get_bits(&s->gb, 3);
+        // 4 modes, same table
+        w->j_dc_vlc[mode] = &j_dc_vlc[w->quant < 13][table_index];
     }
     assert(w->j_dc_vlc);
     assert(w->j_dc_vlc[mode]->table);
 
-    i=get_vlc2(&s->gb, w->j_dc_vlc[mode]->table, DC_VLC_BITS, DC_VLC_MTD);
+    i = get_vlc2(&s->gb, w->j_dc_vlc[mode]->table, DC_VLC_BITS, DC_VLC_MTD);
 
-    /*(i>=17) {i-=17;final=1;}*/
-    c= i>16;
-    (*final)=c;
-    i-=17*c;
+    /* (i >= 17) { i -= 17; final =1; } */
+    c        = i > 16;
+    (*final) = c;
+    i       -= 17 * c;
 
-    if(i<=0){
-        (*level)=0;
+    if (i <= 0) {
+        (*level) = 0;
         return -i;
     }
-    c=(i+1)>>1;//hackish way to calculate dc_extra_sbits[]
-    c-=c>1;
+    c  = (i + 1) >> 1; // hackish way to calculate dc_extra_sbits[]
+    c -= c > 1;
 
-    e=get_bits(&s->gb,c);//get the extra bits
-    i=dc_index_offset[i]+(e>>1);
+    e = get_bits(&s->gb, c); // get the extra bits
+    i = dc_index_offset[i] + (e >> 1);
 
-    e= -(e & 1);//0,0xffffff
-    (*level)= (i ^ e) - e;// (i^0)-0 , (i^0xff)-(-1)
+    e        = -(e & 1); // 0, 0xffffff
+    (*level) = (i ^ e) - e; // (i ^ 0) -0  , (i ^ 0xff) - (-1)
     return 0;
 }
-//end of huffman
 
-static int x8_setup_spatial_predictor(IntraX8Context * const w, const int chroma){
-    MpegEncContext * const s= w->s;
+// end of huffman
+
+static int x8_setup_spatial_predictor(IntraX8Context *const w, const int chroma)
+{
+    MpegEncContext *const s = w->s;
     int range;
     int sum;
     int quant;
 
     w->dsp.setup_spatial_compensation(s->dest[chroma], s->sc.edge_emu_buffer,
-                                      s->current_picture.f->linesize[chroma>0],
+                                      s->current_picture.f->linesize[chroma > 0],
                                       &range, &sum, w->edges);
-    if(chroma){
-        w->orient=w->chroma_orient;
-        quant=w->quant_dc_chroma;
-    }else{
-        quant=w->quant;
+    if (chroma) {
+        w->orient = w->chroma_orient;
+        quant     = w->quant_dc_chroma;
+    } else {
+        quant = w->quant;
     }
 
-    w->flat_dc=0;
-    if(range < quant || range < 3){
-        w->orient=0;
-        if(range < 3){//yep you read right, a +-1 idct error may break decoding!
-            w->flat_dc=1;
-            sum+=9;
-            w->predicted_dc = (sum*6899)>>17;//((1<<17)+9)/(8+8+1+2)=6899
+    w->flat_dc = 0;
+    if (range < quant || range < 3) {
+        w->orient = 0;
+
+        // yep you read right, a +-1 idct error may break decoding!
+        if (range < 3) {
+            w->flat_dc      = 1;
+            sum            += 9;
+            // ((1 << 17) + 9) / (8 + 8 + 1 + 2) = 6899
+            w->predicted_dc = (sum * 6899) >> 17;
         }
     }
-    if(chroma)
+    if (chroma)
         return 0;
 
     assert(w->orient < 3);
-    if(range < 2*w->quant){
-        if( (w->edges&3) == 0){
-            if(w->orient==1) w->orient=11;
-            if(w->orient==2) w->orient=10;
-        }else{
-            w->orient=0;
+    if (range < 2 * w->quant) {
+        if ((w->edges & 3) == 0) {
+            if (w->orient == 1)
+                w->orient = 11;
+            if (w->orient == 2)
+                w->orient = 10;
+        } else {
+            w->orient = 0;
         }
-        w->raw_orient=0;
-    }else{
-        static const uint8_t prediction_table[3][12]={
-            {0,8,4, 10,11, 2,6,9,1,3,5,7},
-            {4,0,8, 11,10, 3,5,2,6,9,1,7},
-            {8,0,4, 10,11, 1,7,2,6,9,3,5}
+        w->raw_orient = 0;
+    } else {
+        static const uint8_t prediction_table[3][12] = {
+            { 0, 8, 4, 10, 11, 2, 6, 9, 1, 3, 5, 7 },
+            { 4, 0, 8, 11, 10, 3, 5, 2, 6, 9, 1, 7 },
+            { 8, 0, 4, 10, 11, 1, 7, 2, 6, 9, 3, 5 },
         };
-        w->raw_orient=x8_get_orient_vlc(w);
-        if(w->raw_orient<0) return -1;
-        assert(w->raw_orient < 12 );
-        assert(w->orient<3);
-        w->orient=prediction_table[w->orient][w->raw_orient];
+        w->raw_orient = x8_get_orient_vlc(w);
+        if (w->raw_orient < 0)
+            return -1;
+        assert(w->raw_orient < 12);
+        assert(w->orient < 3);
+        w->orient = prediction_table[w->orient][w->raw_orient];
     }
     return 0;
 }
 
-static void x8_update_predictions(IntraX8Context * const w, const int orient, const int est_run ){
-    MpegEncContext * const s= w->s;
+static void x8_update_predictions(IntraX8Context *const w, const int orient,
+                                  const int est_run)
+{
+    MpegEncContext *const s = w->s;
 
-    w->prediction_table[s->mb_x*2+(s->mb_y&1)] = (est_run<<2) + 1*(orient==4) + 2*(orient==8);
+    w->prediction_table[s->mb_x * 2 + (s->mb_y & 1)] = (est_run << 2) + 1 * (orient == 4) + 2 * (orient == 8);
 /*
-  y=2n+0 ->//0 2 4
-  y=2n+1 ->//1 3 5
-*/
+ * y = 2n + 0 -> // 0 2 4
+ * y = 2n + 1 -> // 1 3 5
+ */
 }
-static void x8_get_prediction_chroma(IntraX8Context * const w){
-    MpegEncContext * const s= w->s;
 
-    w->edges = 1*( !(s->mb_x>>1) );
-    w->edges|= 2*( !(s->mb_y>>1) );
-    w->edges|= 4*( s->mb_x >= (2*s->mb_width-1) );//mb_x for chroma would always be odd
+static void x8_get_prediction_chroma(IntraX8Context *const w)
+{
+    MpegEncContext *const s = w->s;
 
-    w->raw_orient=0;
-    if(w->edges&3){//lut_co[8]={inv,4,8,8, inv,4,8,8}<- =>{1,1,0,0;1,1,0,0} => 0xCC
-        w->chroma_orient=4<<((0xCC>>w->edges)&1);
+    w->edges  = 1 * (!(s->mb_x >> 1));
+    w->edges |= 2 * (!(s->mb_y >> 1));
+    w->edges |= 4 * (s->mb_x >= (2 * s->mb_width - 1)); // mb_x for chroma would always be odd
+
+    w->raw_orient = 0;
+    // lut_co[8] = {inv,4,8,8, inv,4,8,8} <- => {1,1,0,0;1,1,0,0} => 0xCC
+    if (w->edges & 3) {
+        w->chroma_orient = 4 << ((0xCC >> w->edges) & 1);
         return;
     }
-    w->chroma_orient = (w->prediction_table[2*s->mb_x-2] & 0x03)<<2;//block[x-1][y|1-1)]
+    // block[x - 1][y | 1 - 1)]
+    w->chroma_orient = (w->prediction_table[2 * s->mb_x - 2] & 0x03) << 2;
 }
 
-static void x8_get_prediction(IntraX8Context * const w){
-    MpegEncContext * const s= w->s;
-    int a,b,c,i;
-
-    w->edges = 1*( !s->mb_x );
-    w->edges|= 2*( !s->mb_y );
-    w->edges|= 4*( s->mb_x >= (2*s->mb_width-1) );
-
-    switch(w->edges&3){
-        case 0:
-            break;
-        case 1:
-            //take the one from the above block[0][y-1]
-            w->est_run = w->prediction_table[!(s->mb_y&1)]>>2;
-            w->orient  = 1;
-            return;
-        case 2:
-            //take the one from the previous block[x-1][0]
-            w->est_run = w->prediction_table[2*s->mb_x-2]>>2;
-            w->orient  = 2;
-            return;
-        case 3:
-            w->est_run = 16;
-            w->orient  = 0;
-            return;
+static void x8_get_prediction(IntraX8Context *const w)
+{
+    MpegEncContext *const s = w->s;
+    int a, b, c, i;
+
+    w->edges  = 1 * (!s->mb_x);
+    w->edges |= 2 * (!s->mb_y);
+    w->edges |= 4 * (s->mb_x >= (2 * s->mb_width - 1));
+
+    switch (w->edges & 3) {
+    case 0:
+        break;
+    case 1:
+        // take the one from the above block[0][y - 1]
+        w->est_run = w->prediction_table[!(s->mb_y & 1)] >> 2;
+        w->orient  = 1;
+        return;
+    case 2:
+        // take the one from the previous block[x - 1][0]
+        w->est_run = w->prediction_table[2 * s->mb_x - 2] >> 2;
+        w->orient  = 2;
+        return;
+    case 3:
+        w->est_run = 16;
+        w->orient  = 0;
+        return;
     }
-    //no edge cases
-    b= w->prediction_table[2*s->mb_x   + !(s->mb_y&1) ];//block[x  ][y-1]
-    a= w->prediction_table[2*s->mb_x-2 +  (s->mb_y&1) ];//block[x-1][y  ]
-    c= w->prediction_table[2*s->mb_x-2 + !(s->mb_y&1) ];//block[x-1][y-1]
+    // no edge cases
+    b = w->prediction_table[2 * s->mb_x     + !(s->mb_y & 1)]; // block[x    ][y - 1]
+    a = w->prediction_table[2 * s->mb_x - 2 +  (s->mb_y & 1)]; // block[x - 1][y    ]
+    c = w->prediction_table[2 * s->mb_x - 2 + !(s->mb_y & 1)]; // block[x - 1][y - 1]
 
-    w->est_run = FFMIN(b,a);
+    w->est_run = FFMIN(b, a);
     /* This condition has nothing to do with w->edges, even if it looks
-       similar it would trigger if e.g. x=3;y=2;
-       I guess somebody wrote something wrong and it became standard. */
-    if( (s->mb_x & s->mb_y) != 0 ) w->est_run=FFMIN(c,w->est_run);
-    w->est_run>>=2;
-
-    a&=3;
-    b&=3;
-    c&=3;
-
-    i=( 0xFFEAF4C4>>(2*b+8*a) )&3;
-    if(i!=3) w->orient=i;
-    else     w->orient=( 0xFFEAD8>>(2*c+8*(w->quant>12)) )&3;
+     * similar it would trigger if e.g. x = 3; y = 2;
+     * I guess somebody wrote something wrong and it became standard. */
+    if ((s->mb_x & s->mb_y) != 0)
+        w->est_run = FFMIN(c, w->est_run);
+    w->est_run >>= 2;
+
+    a &= 3;
+    b &= 3;
+    c &= 3;
+
+    i = (0xFFEAF4C4 >> (2 * b + 8 * a)) & 3;
+    if (i != 3)
+        w->orient = i;
+    else
+        w->orient = (0xFFEAD8 >> (2 * c + 8 * (w->quant > 12))) & 3;
 /*
-lut1[b][a]={
-->{0, 1, 0, pad},
-  {0, 1, X, pad},
-  {2, 2, 2, pad}}
-   pad 2   2  2; pad X  1  0; pad 0  1  0 <-
--> 11 10 '10 10 '11 11'01 00 '11 00'01 00=>0xEAF4C4
-
-lut2[q>12][c]={
-  ->{0,2,1,pad},
-    {2,2,2,pad}}
-   pad 2  2  2; pad 1  2  0 <-
--> 11 10'10 10 '11 01'10 00=>0xEAD8
-*/
+ * lut1[b][a] = {
+ * ->{ 0, 1, 0, pad },
+ *   { 0, 1, X, pad },
+ *   { 2, 2, 2, pad }
+ * }
+ * pad 2  2  2;
+ * pad X  1  0;
+ * pad 0  1  0 <-
+ * -> 11 10 '10 10 '11 11'01 00 '11 00'01 00 => 0xEAF4C4
+ *
+ * lut2[q>12][c] = {
+ * ->{ 0, 2, 1, pad},
+ *   { 2, 2, 2, pad}
+ * }
+ * pad 2  2  2;
+ * pad 1  2  0 <-
+ * -> 11 10'10 10 '11 01'10 00 => 0xEAD8
+ */
 }
 
-
-static void x8_ac_compensation(IntraX8Context * const w, int const direction, int const dc_level){
-    MpegEncContext * const s= w->s;
+static void x8_ac_compensation(IntraX8Context *const w, int const direction,
+                               int const dc_level)
+{
+    MpegEncContext *const s = w->s;
     int t;
 #define B(x, y) s->block[0][s->idsp.idct_permutation[(x) + (y) * 8]]
 #define T(x)  ((x) * dc_level + 0x8000) >> 16;
-    switch(direction){
+    switch (direction) {
     case 0:
-        t = T(3811);//h
-        B(1,0) -= t;
-        B(0,1) -= t;
-
-        t = T(487);//e
-        B(2,0) -= t;
-        B(0,2) -= t;
-
-        t = T(506);//f
-        B(3,0) -= t;
-        B(0,3) -= t;
-
-        t = T(135);//c
-        B(4,0) -= t;
-        B(0,4) -= t;
-        B(2,1) += t;
-        B(1,2) += t;
-        B(3,1) += t;
-        B(1,3) += t;
-
-        t = T(173);//d
-        B(5,0) -= t;
-        B(0,5) -= t;
-
-        t = T(61);//b
-        B(6,0) -= t;
-        B(0,6) -= t;
-        B(5,1) += t;
-        B(1,5) += t;
-
-        t = T(42); //a
-        B(7,0) -= t;
-        B(0,7) -= t;
-        B(4,1) += t;
-        B(1,4) += t;
-        B(4,4) += t;
-
-        t = T(1084);//g
-        B(1,1) += t;
-
-        s->block_last_index[0] = FFMAX(s->block_last_index[0], 7*8);
+        t        = T(3811); // h
+        B(1, 0) -= t;
+        B(0, 1) -= t;
+
+        t        = T(487); // e
+        B(2, 0) -= t;
+        B(0, 2) -= t;
+
+        t        = T(506); // f
+        B(3, 0) -= t;
+        B(0, 3) -= t;
+
+        t        = T(135); // c
+        B(4, 0) -= t;
+        B(0, 4) -= t;
+        B(2, 1) += t;
+        B(1, 2) += t;
+        B(3, 1) += t;
+        B(1, 3) += t;
+
+        t        = T(173); // d
+        B(5, 0) -= t;
+        B(0, 5) -= t;
+
+        t        = T(61); // b
+        B(6, 0) -= t;
+        B(0, 6) -= t;
+        B(5, 1) += t;
+        B(1, 5) += t;
+
+        t        = T(42); // a
+        B(7, 0) -= t;
+        B(0, 7) -= t;
+        B(4, 1) += t;
+        B(1, 4) += t;
+        B(4, 4) += t;
+
+        t        = T(1084); // g
+        B(1, 1) += t;
+
+        s->block_last_index[0] = FFMAX(s->block_last_index[0], 7 * 8);
         break;
     case 1:
-        B(0,1) -= T(6269);
-        B(0,3) -= T( 708);
-        B(0,5) -= T( 172);
-        B(0,7) -= T(  73);
+        B(0, 1) -= T(6269);
+        B(0, 3) -= T(708);
+        B(0, 5) -= T(172);
+        B(0, 7) -= T(73);
 
-        s->block_last_index[0] = FFMAX(s->block_last_index[0], 7*8);
+        s->block_last_index[0] = FFMAX(s->block_last_index[0], 7 * 8);
         break;
     case 2:
-        B(1,0) -= T(6269);
-        B(3,0) -= T( 708);
-        B(5,0) -= T( 172);
-        B(7,0) -= T(  73);
+        B(1, 0) -= T(6269);
+        B(3, 0) -= T(708);
+        B(5, 0) -= T(172);
+        B(7, 0) -= T(73);
 
         s->block_last_index[0] = FFMAX(s->block_last_index[0], 7);
         break;
@@ -510,172 +555,177 @@ static void x8_ac_compensation(IntraX8Context * const w, int const direction, in
 #undef T
 }
 
-static void dsp_x8_put_solidcolor(uint8_t const pix, uint8_t * dst, int const linesize){
+static void dsp_x8_put_solidcolor(uint8_t const pix, uint8_t *dst,
+                                  int const linesize)
+{
     int k;
-    for(k=0;k<8;k++){
-        memset(dst,pix,8);
-        dst+=linesize;
+    for (k = 0; k < 8; k++) {
+        memset(dst, pix, 8);
+        dst += linesize;
     }
 }
 
 static const int16_t quant_table[64] = {
-    256, 256, 256, 256,  256, 256, 259, 262,
-    265, 269, 272, 275,  278, 282, 285, 288,
-    292, 295, 299, 303,  306, 310, 314, 317,
-    321, 325, 329, 333,  337, 341, 345, 349,
-    353, 358, 362, 366,  371, 375, 379, 384,
-    389, 393, 398, 403,  408, 413, 417, 422,
-    428, 433, 438, 443,  448, 454, 459, 465,
-    470, 476, 482, 488,  493, 499, 505, 511
+    256, 256, 256, 256, 256, 256, 259, 262,
+    265, 269, 272, 275, 278, 282, 285, 288,
+    292, 295, 299, 303, 306, 310, 314, 317,
+    321, 325, 329, 333, 337, 341, 345, 349,
+    353, 358, 362, 366, 371, 375, 379, 384,
+    389, 393, 398, 403, 408, 413, 417, 422,
+    428, 433, 438, 443, 448, 454, 459, 465,
+    470, 476, 482, 488, 493, 499, 505, 511,
 };
 
-static int x8_decode_intra_mb(IntraX8Context* const w, const int chroma){
-    MpegEncContext * const s= w->s;
+static int x8_decode_intra_mb(IntraX8Context *const w, const int chroma)
+{
+    MpegEncContext *const s = w->s;
 
-    uint8_t * scantable;
-    int final,run,level;
-    int ac_mode,dc_mode,est_run,dc_level;
-    int pos,n;
+    uint8_t *scantable;
+    int final, run, level;
+    int ac_mode, dc_mode, est_run, dc_level;
+    int pos, n;
     int zeros_only;
     int use_quant_matrix;
     int sign;
 
-    assert(w->orient<12);
+    assert(w->orient < 12);
     s->bdsp.clear_block(s->block[0]);
 
-    if(chroma){
-        dc_mode=2;
-    }else{
-        dc_mode=!!w->est_run;//0,1
-    }
-
-    if(x8_get_dc_rlf(w, dc_mode, &dc_level, &final)) return -1;
-    n=0;
-    zeros_only=0;
-    if(!final){//decode ac
-        use_quant_matrix=w->use_quant_matrix;
-        if(chroma){
+    if (chroma)
+        dc_mode = 2;
+    else
+        dc_mode = !!w->est_run; // 0, 1
+
+    if (x8_get_dc_rlf(w, dc_mode, &dc_level, &final))
+        return -1;
+    n          = 0;
+    zeros_only = 0;
+    if (!final) { // decode ac
+        use_quant_matrix = w->use_quant_matrix;
+        if (chroma) {
             ac_mode = 1;
-            est_run = 64;//not used
-        }else{
-            if (w->raw_orient < 3){
+            est_run = 64; // not used
+        } else {
+            if (w->raw_orient < 3)
                 use_quant_matrix = 0;
-            }
-            if(w->raw_orient > 4){
+
+            if (w->raw_orient > 4) {
                 ac_mode = 0;
                 est_run = 64;
-            }else{
-                if(w->est_run > 1){
+            } else {
+                if (w->est_run > 1) {
                     ac_mode = 2;
-                    est_run=w->est_run;
-                }else{
+                    est_run = w->est_run;
+                } else {
                     ac_mode = 3;
                     est_run = 64;
                 }
             }
         }
-        x8_select_ac_table(w,ac_mode);
-        /*scantable_selector[12]={0,2,0,1,1,1,0,2,2,0,1,2};<-
-        -> 10'01' 00'10' 10'00' 01'01' 01'00' 10'00 =>0x928548 */
-        scantable = w->scantable[ (0x928548>>(2*w->orient))&3 ].permutated;
-        pos=0;
+        x8_select_ac_table(w, ac_mode);
+        /* scantable_selector[12] = { 0, 2, 0, 1, 1, 1, 0, 2, 2, 0, 1, 2 }; <-
+         * -> 10'01' 00'10' 10'00' 01'01' 01'00' 10'00 => 0x928548 */
+        scantable = w->scantable[(0x928548 >> (2 * w->orient)) & 3].permutated;
+        pos       = 0;
         do {
             n++;
-            if( n >= est_run ){
-                ac_mode=3;
-                x8_select_ac_table(w,3);
+            if (n >= est_run) {
+                ac_mode = 3;
+                x8_select_ac_table(w, 3);
             }
 
-            x8_get_ac_rlf(w,ac_mode,&run,&level,&final);
+            x8_get_ac_rlf(w, ac_mode, &run, &level, &final);
 
-            pos+=run+1;
-            if(pos>63){
-                //this also handles vlc error in x8_get_ac_rlf
+            pos += run + 1;
+            if (pos > 63) {
+                // this also handles vlc error in x8_get_ac_rlf
                 return -1;
             }
-            level= (level+1) * w->dquant;
-            level+= w->qsum;
+            level  = (level + 1) * w->dquant;
+            level += w->qsum;
 
-            sign = - get_bits1(&s->gb);
+            sign  = -get_bits1(&s->gb);
             level = (level ^ sign) - sign;
 
-            if(use_quant_matrix){
-                level = (level*quant_table[pos])>>8;
-            }
-            s->block[0][ scantable[pos] ]=level;
-        }while(!final);
+            if (use_quant_matrix)
+                level = (level * quant_table[pos]) >> 8;
 
-        s->block_last_index[0]=pos;
-    }else{//DC only
-        s->block_last_index[0]=0;
-        if(w->flat_dc && ((unsigned)(dc_level+1)) < 3){//[-1;1]
-            int32_t divide_quant= !chroma ? w->divide_quant_dc_luma:
-                                            w->divide_quant_dc_chroma;
-            int32_t dc_quant    = !chroma ? w->quant:
-                                            w->quant_dc_chroma;
+            s->block[0][scantable[pos]] = level;
+        } while (!final);
 
-            //original intent dc_level+=predicted_dc/quant; but it got lost somewhere in the rounding
-            dc_level+= (w->predicted_dc*divide_quant + (1<<12) )>>13;
+        s->block_last_index[0] = pos;
+    } else { // DC only
+        s->block_last_index[0] = 0;
+        if (w->flat_dc && ((unsigned) (dc_level + 1)) < 3) { // [-1; 1]
+            int32_t divide_quant = !chroma ? w->divide_quant_dc_luma
+                                           : w->divide_quant_dc_chroma;
+            int32_t dc_quant     = !chroma ? w->quant
+                                           : w->quant_dc_chroma;
 
-            dsp_x8_put_solidcolor( av_clip_uint8((dc_level*dc_quant+4)>>3),
-                                   s->dest[chroma], s->current_picture.f->linesize[!!chroma]);
+            // original intent dc_level += predicted_dc/quant;
+            // but it got lost somewhere in the rounding
+            dc_level += (w->predicted_dc * divide_quant + (1 << 12)) >> 13;
+
+            dsp_x8_put_solidcolor(av_clip_uint8((dc_level * dc_quant + 4) >> 3),
+                                  s->dest[chroma],
+                                  s->current_picture.f->linesize[!!chroma]);
 
             goto block_placed;
         }
         zeros_only = (dc_level == 0);
     }
-    if(!chroma){
-        s->block[0][0] = dc_level*w->quant;
-    }else{
-        s->block[0][0] = dc_level*w->quant_dc_chroma;
-    }
+    if (!chroma)
+        s->block[0][0] = dc_level * w->quant;
+    else
+        s->block[0][0] = dc_level * w->quant_dc_chroma;
 
-    //there is !zero_only check in the original, but dc_level check is enough
-    if( (unsigned int)(dc_level+1) >= 3 && (w->edges&3) != 3 ){
+    // there is !zero_only check in the original, but dc_level check is enough
+    if ((unsigned int) (dc_level + 1) >= 3 && (w->edges & 3) != 3) {
         int direction;
-        /*ac_comp_direction[orient] = { 0, 3, 3, 1, 1, 0, 0, 0, 2, 2, 2, 1 };<-
-        -> 01'10' 10'10' 00'00' 00'01' 01'11' 11'00 =>0x6A017C */
-        direction= (0x6A017C>>(w->orient*2))&3;
-        if (direction != 3){
-            x8_ac_compensation(w, direction, s->block[0][0]);//modify block_last[]
+        /* ac_comp_direction[orient] = { 0, 3, 3, 1, 1, 0, 0, 0, 2, 2, 2, 1 }; <-
+         * -> 01'10' 10'10' 00'00' 00'01' 01'11' 11'00 => 0x6A017C */
+        direction = (0x6A017C >> (w->orient * 2)) & 3;
+        if (direction != 3) {
+            // modify block_last[]
+            x8_ac_compensation(w, direction, s->block[0][0]);
         }
     }
 
-    if(w->flat_dc){
-        dsp_x8_put_solidcolor(w->predicted_dc, s->dest[chroma], s->current_picture.f->linesize[!!chroma]);
-    }else{
-        w->dsp.spatial_compensation[w->orient]( s->sc.edge_emu_buffer,
-                                            s->dest[chroma],
-                                            s->current_picture.f->linesize[!!chroma] );
+    if (w->flat_dc) {
+        dsp_x8_put_solidcolor(w->predicted_dc, s->dest[chroma],
+                              s->current_picture.f->linesize[!!chroma]);
+    } else {
+        w->dsp.spatial_compensation[w->orient](s->sc.edge_emu_buffer,
+                                               s->dest[chroma],
+                                               s->current_picture.f->linesize[!!chroma]);
     }
-    if(!zeros_only)
+    if (!zeros_only)
         s->idsp.idct_add(s->dest[chroma],
                          s->current_picture.f->linesize[!!chroma],
                          s->block[0]);
 
 block_placed:
+    if (!chroma)
+        x8_update_predictions(w, w->orient, n);
 
-    if(!chroma){
-        x8_update_predictions(w,w->orient,n);
-    }
-
-    if(s->loop_filter){
-        uint8_t* ptr = s->dest[chroma];
+    if (s->loop_filter) {
+        uint8_t *ptr = s->dest[chroma];
         int linesize = s->current_picture.f->linesize[!!chroma];
 
-        if(!( (w->edges&2) || ( zeros_only && (w->orient|4)==4 ) )){
+        if (!((w->edges & 2) || (zeros_only && (w->orient | 4) == 4)))
             w->dsp.h_loop_filter(ptr, linesize, w->quant);
-        }
-        if(!( (w->edges&1) || ( zeros_only && (w->orient|8)==8 ) )){
+
+        if (!((w->edges & 1) || (zeros_only && (w->orient | 8) == 8)))
             w->dsp.v_loop_filter(ptr, linesize, w->quant);
-        }
     }
     return 0;
 }
 
-static void x8_init_block_index(MpegEncContext *s){ //FIXME maybe merge with ff_*
-//not s->linesize as this would be wrong for field pics
-//not that IntraX8 has interlacing support ;)
+// FIXME maybe merge with ff_*
+static void x8_init_block_index(MpegEncContext *s)
+{
+    // not s->linesize as this would be wrong for field pics
+    // not that IntraX8 has interlacing support ;)
     const int linesize   = s->current_picture.f->linesize[0];
     const int uvlinesize = s->current_picture.f->linesize[1];
 
@@ -683,9 +733,10 @@ static void x8_init_block_index(MpegEncContext *s){ //FIXME maybe merge with ff_
     s->dest[1] = s->current_picture.f->data[1];
     s->dest[2] = s->current_picture.f->data[2];
 
-    s->dest[0] +=   s->mb_y        *   linesize << 3;
-    s->dest[1] += ( s->mb_y&(~1) ) * uvlinesize << 2;//chroma blocks are on add rows
-    s->dest[2] += ( s->mb_y&(~1) ) * uvlinesize << 2;
+    s->dest[0] +=  s->mb_y         * linesize   << 3;
+    // chroma blocks are on add rows
+    s->dest[1] += (s->mb_y & (~1)) * uvlinesize << 2;
+    s->dest[2] += (s->mb_y & (~1)) * uvlinesize << 2;
 }
 
 /**
@@ -694,16 +745,21 @@ static void x8_init_block_index(MpegEncContext *s){ //FIXME maybe merge with ff_
  * @param w pointer to IntraX8Context
  * @param s pointer to MpegEncContext of the parent codec
  */
-av_cold void ff_intrax8_common_init(IntraX8Context * w, MpegEncContext * const s){
-
-    w->s=s;
+av_cold void ff_intrax8_common_init(IntraX8Context *w, MpegEncContext *const s)
+{
+    w->s = s;
     x8_vlc_init();
-    assert(s->mb_width>0);
-    w->prediction_table=av_mallocz(s->mb_width*2*2);//two rows, 2 blocks per cannon mb
+    assert(s->mb_width > 0);
 
-    ff_init_scantable(s->idsp.idct_permutation, &w->scantable[0], ff_wmv1_scantable[0]);
-    ff_init_scantable(s->idsp.idct_permutation, &w->scantable[1], ff_wmv1_scantable[2]);
-    ff_init_scantable(s->idsp.idct_permutation, &w->scantable[2], ff_wmv1_scantable[3]);
+    // two rows, 2 blocks per cannon mb
+    w->prediction_table = av_mallocz(s->mb_width * 2 * 2);
+
+    ff_init_scantable(s->idsp.idct_permutation, &w->scantable[0],
+                      ff_wmv1_scantable[0]);
+    ff_init_scantable(s->idsp.idct_permutation, &w->scantable[1],
+                      ff_wmv1_scantable[2]);
+    ff_init_scantable(s->idsp.idct_permutation, &w->scantable[2],
+                      ff_wmv1_scantable[3]);
 
     ff_intrax8dsp_init(&w->dsp);
 }
@@ -712,7 +768,7 @@ av_cold void ff_intrax8_common_init(IntraX8Context * w, MpegEncContext * const s
  * Destroy IntraX8 frame structure.
  * @param w pointer to IntraX8Context
  */
-av_cold void ff_intrax8_common_end(IntraX8Context * w)
+av_cold void ff_intrax8_common_end(IntraX8Context *w)
 {
     av_freep(&w->prediction_table);
 }
@@ -727,8 +783,10 @@ av_cold void ff_intrax8_common_end(IntraX8Context * w)
  * @param dquant doubled quantizer, it would be odd in case of VC-1 halfpq==1.
  * @param quant_offset offset away from zero
  */
-int ff_intrax8_decode_picture(IntraX8Context * const w, int dquant, int quant_offset){
-    MpegEncContext * const s= w->s;
+int ff_intrax8_decode_picture(IntraX8Context *const w, int dquant,
+                              int quant_offset)
+{
+    MpegEncContext *const s = w->s;
     int mb_xy;
     assert(s);
     w->use_quant_matrix = get_bits1(&s->gb);
@@ -737,51 +795,53 @@ int ff_intrax8_decode_picture(IntraX8Context * const w, int dquant, int quant_of
     w->quant  = dquant >> 1;
     w->qsum   = quant_offset;
 
-    w->divide_quant_dc_luma = ((1<<16) + (w->quant>>1)) / w->quant;
-    if(w->quant < 5){
-        w->quant_dc_chroma =  w->quant;
+    w->divide_quant_dc_luma = ((1 << 16) + (w->quant >> 1)) / w->quant;
+    if (w->quant < 5) {
+        w->quant_dc_chroma        = w->quant;
         w->divide_quant_dc_chroma = w->divide_quant_dc_luma;
-    }else{
-        w->quant_dc_chroma =  w->quant+((w->quant+3)>>3);
-        w->divide_quant_dc_chroma = ((1<<16) + (w->quant_dc_chroma>>1)) / w->quant_dc_chroma;
+    } else {
+        w->quant_dc_chroma        = w->quant + ((w->quant + 3) >> 3);
+        w->divide_quant_dc_chroma = ((1 << 16) + (w->quant_dc_chroma >> 1)) / w->quant_dc_chroma;
     }
     x8_reset_vlc_tables(w);
 
-
-    for(s->mb_y=0; s->mb_y < s->mb_height*2; s->mb_y++){
+    for (s->mb_y = 0; s->mb_y < s->mb_height * 2; s->mb_y++) {
         x8_init_block_index(s);
-        mb_xy=(s->mb_y>>1)*s->mb_stride;
+        mb_xy = (s->mb_y >> 1) * s->mb_stride;
 
-        for(s->mb_x=0; s->mb_x < s->mb_width*2; s->mb_x++){
+        for (s->mb_x = 0; s->mb_x < s->mb_width * 2; s->mb_x++) {
             x8_get_prediction(w);
-            if(x8_setup_spatial_predictor(w,0)) goto error;
-            if(x8_decode_intra_mb(w,0)) goto error;
+            if (x8_setup_spatial_predictor(w, 0))
+                goto error;
+            if (x8_decode_intra_mb(w, 0))
+                goto error;
 
-            if( s->mb_x & s->mb_y & 1 ){
+            if (s->mb_x & s->mb_y & 1) {
                 x8_get_prediction_chroma(w);
 
-                /*when setting up chroma, no vlc is read,
-                so no error condition can be reached*/
-                x8_setup_spatial_predictor(w,1);
-                if(x8_decode_intra_mb(w,1)) goto error;
+                /* when setting up chroma, no vlc is read,
+                 * so no error condition can be reached */
+                x8_setup_spatial_predictor(w, 1);
+                if (x8_decode_intra_mb(w, 1))
+                    goto error;
 
-                x8_setup_spatial_predictor(w,2);
-                if(x8_decode_intra_mb(w,2)) goto error;
+                x8_setup_spatial_predictor(w, 2);
+                if (x8_decode_intra_mb(w, 2))
+                    goto error;
 
-                s->dest[1]+= 8;
-                s->dest[2]+= 8;
+                s->dest[1] += 8;
+                s->dest[2] += 8;
 
-                /*emulate MB info in the relevant tables*/
-                s->mbskip_table [mb_xy]=0;
-                s->mbintra_table[mb_xy]=1;
+                /* emulate MB info in the relevant tables */
+                s->mbskip_table[mb_xy]                 = 0;
+                s->mbintra_table[mb_xy]                = 1;
                 s->current_picture.qscale_table[mb_xy] = w->quant;
                 mb_xy++;
             }
-            s->dest[0]+= 8;
-        }
-        if(s->mb_y&1){
-            ff_mpeg_draw_horiz_band(s, (s->mb_y-1)*8, 16);
+            s->dest[0] += 8;
         }
+        if (s->mb_y & 1)
+            ff_mpeg_draw_horiz_band(s, (s->mb_y - 1) * 8, 16);
     }
 
 error: