static int
handle_block (mkv_demuxer_t *mkv_d, uint8_t *block, uint64_t length,
uint64_t block_duration, int64_t block_bref, int64_t block_fref, uint8_t simpleblock)
{
int ii, num, tmp;
mkv_track_t *track = NULL;
int nRet = 1;
/* first byte(s): track num */
num = ebml_read_vlen_uint (block, &tmp);
// find track info
for (ii=0; ii<mkv_d->num_tracks; ii++)
{
if ( (mkv_d->tracks[ii]->type == MATROSKA_TRACK_VIDEO)
&& (mkv_d->tracks[ii]->tnum == num) )
{
track = mkv_d->tracks[ii];
break;
}
}
if ( (track != NULL) && track->ms_compat && (track->private_data) &&
(track->hw_notsupport == 0) )
{
BITMAP_INFO_HEADER *src;
uint32_t biCompression;
src = (BITMAP_INFO_HEADER *) track->private_data;
biCompression = le2me_32 (src->biCompression);
if ( (biCompression == mmioFOURCC('X', 'V', 'I', 'D')) ||
(biCompression == mmioFOURCC('x', 'v', 'i', 'd')) ||
(biCompression == mmioFOURCC('D', 'I', 'V', 'X')) ||
(biCompression == mmioFOURCC('d', 'i', 'v', 'x')) ||
(biCompression == mmioFOURCC('D', 'X', '5', '0')) )
{
uint8_t *check_mp4_vol_buf = (uint8_t *)malloc(128);
if (check_mp4_vol_buf != NULL)
{
memcpy(check_mp4_vol_buf, block, 128);
if ( !check_mp4_header_vol(check_mp4_vol_buf, 128) )
{
printf("\nMKV: GMC AND STATIC SPRITE CODING not supported\n\n");
track->hw_notsupport = 1;
nRet = 0;
}
free(check_mp4_vol_buf);
}
}
}
return nRet;
}
/*
* Read a variable length signed int.
*/
int64_t ebml_read_vlen_int(bstr *buffer)
{
uint64_t unum;
int l;
/* read as unsigned number first */
size_t len = buffer->len;
unum = ebml_read_vlen_uint(buffer);
if (unum == EBML_UINT_INVALID)
return EBML_INT_INVALID;
l = len - buffer->len;
return unum - ((1 << ((7 * l) - 1)) - 1);
}
/*
* Read a variable length signed int.
*/
int64_t ebml_read_vlen_int(uint8_t *buffer, int *length)
{
uint64_t unum;
int l;
/* read as unsigned number first */
unum = ebml_read_vlen_uint(buffer, &l);
if (unum == EBML_UINT_INVALID)
return EBML_INT_INVALID;
if (length)
*length = l;
return unum - ((1 << ((7 * l) - 1)) - 1);
}
