#include "parser.h"
#include "vc1.h"
#include "get_bits.h"
+#include "internal.h"
/** The maximum number of bytes of a sequence, entry point or
* frame header whose values we pay any attention to */
static int vc1_split(AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
- int i;
- uint32_t state= -1;
- int charged=0;
+ uint32_t state = -1;
+ int charged = 0;
+ const uint8_t *ptr = buf, *end = buf + buf_size;
- for(i=0; i<buf_size; i++){
- state= (state<<8) | buf[i];
- if(IS_MARKER(state)){
- if(state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT){
- charged=1;
- }else if(charged){
- return i-3;
- }
- }
+ while (ptr < end) {
+ ptr = avpriv_find_start_code(ptr, end, &state);
+ if (state == VC1_CODE_SEQHDR || state == VC1_CODE_ENTRYPOINT) {
+ charged = 1;
+ } else if (charged && IS_MARKER(state))
+ return ptr - 4 - buf;
}
+
return 0;
}