mpeg12: do not fail on zero dimensions in the sequence header.

[ffmpeg] / libavcodec / bitstream.c

diff --git a/libavcodec/bitstream.c b/libavcodec/bitstream.c
index 17b1c69c845c1664b0891f2af72e630d4d5871f2..2c8692a79de71d1df8ce0dcceef6f6c540e2285f 100644 (file)
--- a/libavcodec/bitstream.c
+++ b/libavcodec/bitstream.c
@@ -29,6 +29,7 @@
  */
 
 #include "avcodec.h"
+#include "mathops.h"
 #include "get_bits.h"
 #include "put_bits.h"
 
@@ -41,16 +42,12 @@ const uint8_t ff_log2_run[41]={
 24,
 };
 
-void align_put_bits(PutBitContext *s)
+void avpriv_align_put_bits(PutBitContext *s)
 {
-#ifdef ALT_BITSTREAM_WRITER
-    put_bits(s,(  - s->index) & 7,0);
-#else
     put_bits(s,s->bit_left & 7,0);
-#endif
 }
 
-void ff_put_string(PutBitContext *pb, const char *string, int terminate_string)
+void avpriv_put_string(PutBitContext *pb, const char *string, int terminate_string)
 {
     while(*string){
         put_bits(pb, 8, *string);
@@ -60,7 +57,7 @@ void ff_put_string(PutBitContext *pb, const char *string, int terminate_string)
         put_bits(pb, 8, 0);
 }
 
-void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length)
+void avpriv_copy_bits(PutBitContext *pb, const uint8_t *src, int length)
 {
     int words= length>>4;
     int bits= length&15;
@@ -107,7 +104,7 @@ static int alloc_table(VLC *vlc, int size, int use_static)
     vlc->table_size += size;
     if (vlc->table_size > vlc->table_allocated) {
         if(use_static)
-            abort(); //cant do anything, init_vlc() is used with too little memory
+            abort(); // cannot do anything, init_vlc() is used with too little memory
         vlc->table_allocated += (1 << vlc->bits);
         vlc->table = av_realloc(vlc->table,
                                 sizeof(VLC_TYPE) * 2 * vlc->table_allocated);
@@ -118,10 +115,10 @@ static int alloc_table(VLC *vlc, int size, int use_static)
 }
 
 static av_always_inline uint32_t bitswap_32(uint32_t x) {
-    return (uint32_t)av_reverse[x&0xFF]<<24
-         | (uint32_t)av_reverse[(x>>8)&0xFF]<<16
-         | (uint32_t)av_reverse[(x>>16)&0xFF]<<8
-         | (uint32_t)av_reverse[x>>24];
+    return (uint32_t)ff_reverse[x&0xFF]<<24
+         | (uint32_t)ff_reverse[(x>>8)&0xFF]<<16
+         | (uint32_t)ff_reverse[(x>>16)&0xFF]<<8
+         | (uint32_t)ff_reverse[x>>24];
 }
 
 typedef struct {
@@ -172,7 +169,7 @@ static int build_table(VLC *vlc, int table_nb_bits, int nb_codes,
         table[i][0] = -1; //codes
     }
 
-    /* first pass: map codes and compute auxillary table sizes */
+    /* first pass: map codes and compute auxiliary table sizes */
     for (i = 0; i < nb_codes; i++) {
         n = codes[i].bits;
         code = codes[i].code;
@@ -257,9 +254,9 @@ static int build_table(VLC *vlc, int table_nb_bits, int nb_codes,
    (byte/word/long) to store the 'bits', 'codes', and 'symbols' tables.
 
    'use_static' should be set to 1 for tables, which should be freed
-   with av_free_static(), 0 if free_vlc() will be used.
+   with av_free_static(), 0 if ff_free_vlc() will be used.
 */
-int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
+int ff_init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
              const void *bits, int bits_wrap, int bits_size,
              const void *codes, int codes_wrap, int codes_size,
              const void *symbols, int symbols_wrap, int symbols_size,
@@ -322,8 +319,7 @@ int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
 }
 
 
-void free_vlc(VLC *vlc)
+void ff_free_vlc(VLC *vlc)
 {
     av_freep(&vlc->table);
 }
-