OSCL_EXPORT_REF int16 iGetM4VConfigInfo(uint8 *buffer, int32 length, int32 *width, int32 *height, int32 *display_width, int32 *display_height)
{
int16 status;
mp4StreamType psBits;
psBits.data = buffer;
psBits.numBytes = length;
psBits.bitBuf = 0;
psBits.bitPos = 32;
psBits.bytePos = 0;
psBits.dataBitPos = 0;
*width = *height = *display_height = *display_width = 0;
if (length == 0)
{
return MP4_INVALID_VOL_PARAM;
}
int32 profilelevel = 0; // dummy value discarded here
/* Mobile Media Lab. Start */
int32 is_valid = 0;
uint32 tmp;
/*
check input buffer has visual_object_sequence_start_code or
visual_object_start_code or video_object_start_code or
video_object_layer_start_code or short video header
*/
ShowBits(&psBits, 32, &tmp);
if (tmp == VISUAL_OBJECT_SEQUENCE_START_CODE ||
tmp == VISUAL_OBJECT_START_CODE ||
(tmp >= 0x0100 && tmp <= 0x011F) || /* video_object_start_code */
((tmp & 0x20) == 0x20)) /* video_object_layer_start_code */
{
/* check MPEG-4 start code */
is_valid = 1;
}
else
{
/* check short video header */
ShowBits(&psBits, SHORT_VIDEO_START_MARKER_LENGTH, &tmp);
if (tmp == SHORT_VIDEO_START_MARKER) is_valid = 1;
}
if (is_valid == 0)
{
/* this stream may have a garbage data */
return MP4_INVALID_VOL_PARAM;
}
/* Mobile Media Lab. End */
status = iDecodeVOLHeader(&psBits, width, height, display_width, display_height, &profilelevel);
return status;
}
OSCL_EXPORT_REF int16 iGetM4VConfigInfo(uint8 *buffer, int32 length, int32 *width, int32 *height, int32 *display_width, int32 *display_height)
{
int16 status;
mp4StreamType psBits;
psBits.data = buffer;
psBits.numBytes = length;
psBits.bitBuf = 0;
psBits.bitPos = 32;
psBits.bytePos = 0;
psBits.dataBitPos = 0;
*width = *height = *display_height = *display_width = 0;
if (length == 0)
{
return MP4_INVALID_VOL_PARAM;
}
int32 profilelevel = 0; // dummy value discarded here
status = iDecodeVOLHeader(&psBits, width, height, display_width, display_height, &profilelevel);
return status;
}
