MP3FindFreeSync()

static int fl::third_party::MP3FindFreeSync ( const unsigned char * buf, const unsigned char firstFH[4], int nBytes )

static

Definition at line 153 of file mp3dec.hpp.

{
    int offset = 0;
    const unsigned char *bufPtr = buf;
 
    /* loop until we either: 
     *  - run out of nBytes (FindMP3SyncWord() returns -1)
     *  - find the next valid frame header (sync word, version, layer, CRC flag, bitrate, and sample rate
     *      in next header must match current header)
     */
    while (1) {
        offset = MP3FindSyncWord(bufPtr, nBytes);
        bufPtr += offset;
        if (offset < 0) {
            return -1;
        } else if ( (bufPtr[0] == firstFH[0]) && (bufPtr[1] == firstFH[1]) && ((bufPtr[2] & 0xfc) == (firstFH[2] & 0xfc)) ) {
            /* want to return number of bytes per frame, NOT counting the padding byte, so subtract one if padFlag == 1 */
            if ((firstFH[2] >> 1) & 0x01)
                bufPtr--;
            return bufPtr - buf;
        }
        bufPtr += 3;
        nBytes -= (offset + 3);
    };
 
    return -1;
}

References FL_NOEXCEPT, MP3FindSyncWord(), and offset().

Referenced by MP3Decode().

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