static void
vlVdpDecoderFixVC1Startcode(uint32_t *num_buffers, const void *buffers[], unsigned sizes[])
{
static const uint8_t vc1_startcode[] = { 0x00, 0x00, 0x01, 0x0D };
struct vl_vlc vlc;
unsigned i;
/* search the first 64 bytes for a startcode */
vl_vlc_init(&vlc, *num_buffers, buffers, sizes);
while (vl_vlc_search_byte(&vlc, 64*8, 0x00) && vl_vlc_bits_left(&vlc) >= 32) {
uint32_t value = vl_vlc_peekbits(&vlc, 32);
if (value == 0x0000010D ||
value == 0x0000010C ||
value == 0x0000010B)
return;
vl_vlc_eatbits(&vlc, 8);
}
/* none found, ok add one manually */
VDPAU_MSG(VDPAU_TRACE, "[VDPAU] Manually adding VC-1 startcode\n");
for (i = *num_buffers; i > 0; --i) {
buffers[i] = buffers[i - 1];
sizes[i] = sizes[i - 1];
}
++(*num_buffers);
buffers[0] = vc1_startcode;
sizes[0] = 4;
}
static unsigned int
bufHasStartcode(vlVaBuffer *buf, unsigned int code, unsigned int bits)
{
struct vl_vlc vlc = {0};
int i;
/* search the first 64 bytes for a startcode */
vl_vlc_init(&vlc, 1, (const void * const*)&buf->data, &buf->size);
for (i = 0; i < 64 && vl_vlc_bits_left(&vlc) >= bits; ++i) {
if (vl_vlc_peekbits(&vlc, bits) == code)
return 1;
vl_vlc_eatbits(&vlc, 8);
vl_vlc_fillbits(&vlc);
}
return 0;
}
