static libspectrum_error
raw_data_edge( libspectrum_tape_raw_data_block *block,
libspectrum_tape_raw_data_block_state *state,
libspectrum_dword *tstates, int *end_of_block )
{
int error;
switch (state->state) {
case LIBSPECTRUM_TAPE_STATE_DATA1:
*tstates = state->bit_tstates;
error = libspectrum_tape_raw_data_next_bit( block, state );
if( error ) return error;
break;
case LIBSPECTRUM_TAPE_STATE_PAUSE:
/* The pause at the end of the block */
*tstates = ( block->pause * 69888 )/20; /* FIXME: should vary with tstates
per frame */
*end_of_block = 1;
break;
default:
libspectrum_print_error( LIBSPECTRUM_ERROR_LOGIC,
"raw_edge: unknown state %d", state->state );
return LIBSPECTRUM_ERROR_LOGIC;
}
return LIBSPECTRUM_ERROR_NONE;
}
static void
raw_data_init( libspectrum_tape_raw_data_block *block,
libspectrum_tape_raw_data_block_state *state )
{
if( block->data ) {
/* We're just before the start of the data */
state->state = LIBSPECTRUM_TAPE_STATE_DATA1;
state->bytes_through_block = -1; state->bits_through_byte = 7;
state->last_bit = 0x80 & block->data[0];
/* Set up the next bit */
libspectrum_tape_raw_data_next_bit( block, state );
} else {
state->state = LIBSPECTRUM_TAPE_STATE_PAUSE;
}
}
