void extension_data(char *buf,int startcodepos, int length)
{
int ext_ID;
memcpy (currStream->streamBuffer, buf, length);
currStream->code_len = currStream->bitstream_length = length;
currStream->read_len = currStream->frame_bitoffset = (startcodepos+1)*8;
ext_ID = u_v(4,"extension ID");
switch (ext_ID)
{
case SEQUENCE_DISPLAY_EXTENSION_ID:
sequence_display_extension();
break;
case COPYRIGHT_EXTENSION_ID:
copyright_extension();
break;
case PICTURE_DISPLAY_EXTENSION_ID:
picture_display_extension();
case CAMERAPARAMETERS_EXTENSION_ID:
cameraparameters_extension();
break;
default:
printf("reserved extension start code ID %d\n",ext_ID);
break;
}
}
void extension_data(int i)
{
while (nextbits(8) == EXTENSION_START_CODE)
{
zprintf(1, "\nextension_start_code = 0x000001%02X\n", getbits(8));
if (i == 0)
{
if (nextbits(4) == SEQUENCE_DISPLAY_EXTENSION_ID)
sequence_display_extension();
if (nextbits(4) == SEQUENCE_SCALABLE_EXTENSION_ID)
sequence_scalable_extension();
}
if (i == 2)
{
if (nextbits(4) == QUANT_MATRIX_EXTENSION_ID)
quant_matrix_extension();
if (nextbits(4) == PICTURE_DISPLAY_EXTENSION_ID)
picture_display_extension();
if (nextbits(4) == PICTURE_SPATIAL_SCALABLE_EXTENSION_ID)
picture_spatial_scalable_extension();
if (nextbits(4) == PICTURE_TEMPORAL_SCALABLE_EXTENSION_ID)
picture_temporal_scalable_extension();
}
}
}
static void ext_user_data()
{
int code,ext_ID;
startcode();
while ((code = showbits(32))==EXT_START_CODE || code==USER_START_CODE)
{
if (code==EXT_START_CODE)
{
flushbits32();
ext_ID = getbits(4);
switch (ext_ID)
{
case SEQ_ID:
sequence_extension();
break;
case DISP_ID:
sequence_display_extension();
break;
case QUANT_ID:
quant_matrix_extension();
break;
case SEQSCAL_ID:
sequence_scalable_extension();
break;
case PANSCAN_ID:
picture_display_extension();
break;
case CODING_ID:
picture_coding_extension();
break;
case SPATSCAL_ID:
picture_spatial_scalable_extension();
break;
case TEMPSCAL_ID:
picture_temporal_scalable_extension();
break;
default:
fprintf(stderr,"reserved extension start code ID %d\n",ext_ID);
break;
}
startcode();
}
else
{
if (verbose)
printf("user data\n");
flushbits32();
startcode();
}
}
}