[FFmpeg-cvslog] cabac: Move code only used in the cabac test program to cabac.c.
Diego Biurrun
git at videolan.org
Sun Jul 17 20:12:47 CEST 2011
ffmpeg | branch: master | Diego Biurrun <diego at biurrun.de> | Thu Jul 7 23:16:56 2011 +0200| [fd065d3e799033ed0159f766067f3deefecaf48a] | committer: Diego Biurrun
cabac: Move code only used in the cabac test program to cabac.c.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fd065d3e799033ed0159f766067f3deefecaf48a
---
libavcodec/cabac.c | 134 ++++++++++++++++++++++++++++++++++++++++
libavcodec/cabac.h | 172 ----------------------------------------------------
2 files changed, 134 insertions(+), 172 deletions(-)
diff --git a/libavcodec/cabac.c b/libavcodec/cabac.c
index 4846b32..57ab395 100644
--- a/libavcodec/cabac.c
+++ b/libavcodec/cabac.c
@@ -166,6 +166,140 @@ void ff_init_cabac_states(CABACContext *c){
#include "avcodec.h"
#include "cabac.h"
+static void put_cabac(CABACContext *c, uint8_t * const state, int bit){
+ int RangeLPS= ff_h264_lps_range[2*(c->range&0xC0) + *state];
+
+ if(bit == ((*state)&1)){
+ c->range -= RangeLPS;
+ *state= ff_h264_mps_state[*state];
+ }else{
+ c->low += c->range - RangeLPS;
+ c->range = RangeLPS;
+ *state= ff_h264_lps_state[*state];
+ }
+
+ renorm_cabac_encoder(c);
+
+#ifdef STRICT_LIMITS
+ c->symCount++;
+#endif
+}
+
+/**
+ * @param bit 0 -> write zero bit, !=0 write one bit
+ */
+static void put_cabac_bypass(CABACContext *c, int bit){
+ c->low += c->low;
+
+ if(bit){
+ c->low += c->range;
+ }
+//FIXME optimize
+ if(c->low<0x200){
+ put_cabac_bit(c, 0);
+ }else if(c->low<0x400){
+ c->outstanding_count++;
+ c->low -= 0x200;
+ }else{
+ put_cabac_bit(c, 1);
+ c->low -= 0x400;
+ }
+
+#ifdef STRICT_LIMITS
+ c->symCount++;
+#endif
+}
+
+/**
+ *
+ * @return the number of bytes written
+ */
+static int put_cabac_terminate(CABACContext *c, int bit){
+ c->range -= 2;
+
+ if(!bit){
+ renorm_cabac_encoder(c);
+ }else{
+ c->low += c->range;
+ c->range= 2;
+
+ renorm_cabac_encoder(c);
+
+ assert(c->low <= 0x1FF);
+ put_cabac_bit(c, c->low>>9);
+ put_bits(&c->pb, 2, ((c->low>>7)&3)|1);
+
+ flush_put_bits(&c->pb); //FIXME FIXME FIXME XXX wrong
+ }
+
+#ifdef STRICT_LIMITS
+ c->symCount++;
+#endif
+
+ return (put_bits_count(&c->pb)+7)>>3;
+}
+
+/**
+ * put (truncated) unary binarization.
+ */
+static void put_cabac_u(CABACContext *c, uint8_t * state, int v, int max, int max_index, int truncated){
+ int i;
+
+ assert(v <= max);
+
+ for(i=0; i<v; i++){
+ put_cabac(c, state, 1);
+ if(i < max_index) state++;
+ }
+ if(truncated==0 || v<max)
+ put_cabac(c, state, 0);
+}
+
+/**
+ * put unary exp golomb k-th order binarization.
+ */
+static void put_cabac_ueg(CABACContext *c, uint8_t * state, int v, int max, int is_signed, int k, int max_index){
+ int i;
+
+ if(v==0)
+ put_cabac(c, state, 0);
+ else{
+ const int sign= v < 0;
+
+ if(is_signed) v= FFABS(v);
+
+ if(v<max){
+ for(i=0; i<v; i++){
+ put_cabac(c, state, 1);
+ if(i < max_index) state++;
+ }
+
+ put_cabac(c, state, 0);
+ }else{
+ int m= 1<<k;
+
+ for(i=0; i<max; i++){
+ put_cabac(c, state, 1);
+ if(i < max_index) state++;
+ }
+
+ v -= max;
+ while(v >= m){ //FIXME optimize
+ put_cabac_bypass(c, 1);
+ v-= m;
+ m+= m;
+ }
+ put_cabac_bypass(c, 0);
+ while(m>>=1){
+ put_cabac_bypass(c, v&m);
+ }
+ }
+
+ if(is_signed)
+ put_cabac_bypass(c, sign);
+ }
+}
+
int main(void){
CABACContext c;
uint8_t b[9*SIZE];
diff --git a/libavcodec/cabac.h b/libavcodec/cabac.h
index 57d1d70..1260642 100644
--- a/libavcodec/cabac.h
+++ b/libavcodec/cabac.h
@@ -90,178 +90,6 @@ static inline void renorm_cabac_encoder(CABACContext *c){
}
}
-#ifdef TEST
-static void put_cabac(CABACContext *c, uint8_t * const state, int bit){
- int RangeLPS= ff_h264_lps_range[2*(c->range&0xC0) + *state];
-
- if(bit == ((*state)&1)){
- c->range -= RangeLPS;
- *state= ff_h264_mps_state[*state];
- }else{
- c->low += c->range - RangeLPS;
- c->range = RangeLPS;
- *state= ff_h264_lps_state[*state];
- }
-
- renorm_cabac_encoder(c);
-
-#ifdef STRICT_LIMITS
- c->symCount++;
-#endif
-}
-
-static void put_cabac_static(CABACContext *c, int RangeLPS, int bit){
- assert(c->range > RangeLPS);
-
- if(!bit){
- c->range -= RangeLPS;
- }else{
- c->low += c->range - RangeLPS;
- c->range = RangeLPS;
- }
-
- renorm_cabac_encoder(c);
-
-#ifdef STRICT_LIMITS
- c->symCount++;
-#endif
-}
-
-/**
- * @param bit 0 -> write zero bit, !=0 write one bit
- */
-static void put_cabac_bypass(CABACContext *c, int bit){
- c->low += c->low;
-
- if(bit){
- c->low += c->range;
- }
-//FIXME optimize
- if(c->low<0x200){
- put_cabac_bit(c, 0);
- }else if(c->low<0x400){
- c->outstanding_count++;
- c->low -= 0x200;
- }else{
- put_cabac_bit(c, 1);
- c->low -= 0x400;
- }
-
-#ifdef STRICT_LIMITS
- c->symCount++;
-#endif
-}
-
-/**
- *
- * @return the number of bytes written
- */
-static int put_cabac_terminate(CABACContext *c, int bit){
- c->range -= 2;
-
- if(!bit){
- renorm_cabac_encoder(c);
- }else{
- c->low += c->range;
- c->range= 2;
-
- renorm_cabac_encoder(c);
-
- assert(c->low <= 0x1FF);
- put_cabac_bit(c, c->low>>9);
- put_bits(&c->pb, 2, ((c->low>>7)&3)|1);
-
- flush_put_bits(&c->pb); //FIXME FIXME FIXME XXX wrong
- }
-
-#ifdef STRICT_LIMITS
- c->symCount++;
-#endif
-
- return (put_bits_count(&c->pb)+7)>>3;
-}
-
-/**
- * put (truncated) unary binarization.
- */
-static void put_cabac_u(CABACContext *c, uint8_t * state, int v, int max, int max_index, int truncated){
- int i;
-
- assert(v <= max);
-
-#if 1
- for(i=0; i<v; i++){
- put_cabac(c, state, 1);
- if(i < max_index) state++;
- }
- if(truncated==0 || v<max)
- put_cabac(c, state, 0);
-#else
- if(v <= max_index){
- for(i=0; i<v; i++){
- put_cabac(c, state+i, 1);
- }
- if(truncated==0 || v<max)
- put_cabac(c, state+i, 0);
- }else{
- for(i=0; i<=max_index; i++){
- put_cabac(c, state+i, 1);
- }
- for(; i<v; i++){
- put_cabac(c, state+max_index, 1);
- }
- if(truncated==0 || v<max)
- put_cabac(c, state+max_index, 0);
- }
-#endif
-}
-
-/**
- * put unary exp golomb k-th order binarization.
- */
-static void put_cabac_ueg(CABACContext *c, uint8_t * state, int v, int max, int is_signed, int k, int max_index){
- int i;
-
- if(v==0)
- put_cabac(c, state, 0);
- else{
- const int sign= v < 0;
-
- if(is_signed) v= FFABS(v);
-
- if(v<max){
- for(i=0; i<v; i++){
- put_cabac(c, state, 1);
- if(i < max_index) state++;
- }
-
- put_cabac(c, state, 0);
- }else{
- int m= 1<<k;
-
- for(i=0; i<max; i++){
- put_cabac(c, state, 1);
- if(i < max_index) state++;
- }
-
- v -= max;
- while(v >= m){ //FIXME optimize
- put_cabac_bypass(c, 1);
- v-= m;
- m+= m;
- }
- put_cabac_bypass(c, 0);
- while(m>>=1){
- put_cabac_bypass(c, v&m);
- }
- }
-
- if(is_signed)
- put_cabac_bypass(c, sign);
- }
-}
-#endif /* TEST */
-
static void refill(CABACContext *c){
#if CABAC_BITS == 16
c->low+= (c->bytestream[0]<<9) + (c->bytestream[1]<<1);
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