static int
update_archive_file( char *archive_file, libspectrum_tape *tape )
{
libspectrum_tape_block* info_block;
libspectrum_error error;
libspectrum_tape *tzx;
libspectrum_tape_iterator iterator;
if( read_tape( archive_file, &tzx ) ) return 1;
/* Get the new archive block */
info_block = libspectrum_tape_iterator_init( &iterator, tzx );
while( info_block &&
libspectrum_tape_block_type( info_block ) !=
LIBSPECTRUM_TAPE_BLOCK_ARCHIVE_INFO ) {
info_block = libspectrum_tape_iterator_next( &iterator );
}
if( !info_block ) {
libspectrum_tape_free( tzx );
return 1;
}
/* Remove any existing archive block */
error = remove_block_type( tape, LIBSPECTRUM_TAPE_BLOCK_ARCHIVE_INFO );
if( error ) { libspectrum_tape_free( tzx ); return error; }
/* Finally, put the new info block at the beginning of the block list */
error = libspectrum_tape_insert_block( tape, info_block, 0 );
if( error ) { libspectrum_tape_free( tzx ); return error; }
return 0;
}
/* Free the memory used by a list of blocks, but not the object itself */
libspectrum_error
libspectrum_tape_clear( libspectrum_tape *tape )
{
g_slist_foreach( tape->blocks, block_free, NULL );
g_slist_free( tape->blocks );
tape->blocks = NULL;
libspectrum_tape_iterator_init( &(tape->state.current_block), tape );
return LIBSPECTRUM_ERROR_NONE;
}
static int
remove_block_type( libspectrum_tape *tape, libspectrum_tape_type id )
{
libspectrum_tape_block* block;
libspectrum_tape_iterator iterator;
for( block = libspectrum_tape_iterator_init( &iterator, tape );
block;
block = libspectrum_tape_iterator_next( &iterator ) ) {
if( libspectrum_tape_block_type( block ) == id ) {
libspectrum_tape_remove_block( tape, iterator );
/* Iterator is invalidated by delete, so start again */
block = libspectrum_tape_iterator_init( &iterator, tape );
}
}
return 0;
}
/* Call a user-supplied function for every block in the current tape */
int
tape_foreach( void (*function)( libspectrum_tape_block *block,
void *user_data),
void *user_data )
{
libspectrum_tape_block *block;
libspectrum_tape_iterator iterator;
for( block = libspectrum_tape_iterator_init( &iterator, tape );
block;
block = libspectrum_tape_iterator_next( &iterator ) )
function( block, user_data );
return 0;
}
/* Allocate a list of blocks */
libspectrum_error
libspectrum_tape_alloc( libspectrum_tape **tape )
{
(*tape) = (libspectrum_tape*)malloc( sizeof( libspectrum_tape ) );
if( !(*tape) ) {
libspectrum_print_error( LIBSPECTRUM_ERROR_MEMORY,
"libspectrum_tape_alloc: out of memory" );
return LIBSPECTRUM_ERROR_MEMORY;
}
(*tape)->blocks = NULL;
libspectrum_tape_iterator_init( &((*tape)->state.current_block), *tape );
(*tape)->state.loop_block = NULL;
return LIBSPECTRUM_ERROR_NONE;
}
/* Cause the next block on the tape to be active, initialise it
and return it */
libspectrum_tape_block*
libspectrum_tape_select_next_block( libspectrum_tape *tape )
{
libspectrum_tape_block *block;
if( !tape->state.current_block ) return NULL;
block = libspectrum_tape_iterator_next( &(tape->state.current_block) );
if( !block )
block = libspectrum_tape_iterator_init( &(tape->state.current_block), tape );
if( libspectrum_tape_block_init( block, &(tape->state) ) )
return NULL;
return block;
}
int
tape_blocks_entries(char entries[][256],int length)
{
libspectrum_tape_block *block;
libspectrum_tape_iterator iterator;
int num_entries=0;
for( block = libspectrum_tape_iterator_init( &iterator, tape );
block;
block = libspectrum_tape_iterator_next( &iterator ),num_entries++)
{
char *p=entries[num_entries];
sprintf(p,"%4d: ",num_entries);
tape_block_details(p+6,length-6,block );
}
return num_entries;
}
libspectrum_error
libspectrum_tape_get_next_edge_internal( libspectrum_dword *tstates,
int *flags,
libspectrum_tape *tape,
libspectrum_tape_block_state *it )
{
int error;
libspectrum_tape_block *block =
libspectrum_tape_iterator_current( it->current_block );
/* Has this edge ended the block? */
int end_of_block = 0;
/* After getting a new block, do we want to advance to the next one? */
int no_advance = 0;
/* Assume no special flags by default */
*flags = 0;
if( block ) {
switch( block->type ) {
case LIBSPECTRUM_TAPE_BLOCK_ROM:
error = rom_edge( &(block->types.rom), &(it->block_state.rom), tstates,
&end_of_block );
if( error ) return error;
break;
case LIBSPECTRUM_TAPE_BLOCK_TURBO:
error = turbo_edge( &(block->types.turbo), &(it->block_state.turbo), tstates,
&end_of_block );
if( error ) return error;
break;
case LIBSPECTRUM_TAPE_BLOCK_PURE_TONE:
error = tone_edge( &(block->types.pure_tone), &(it->block_state.pure_tone),
tstates, &end_of_block );
if( error ) return error;
break;
case LIBSPECTRUM_TAPE_BLOCK_PULSES:
error = pulses_edge( &(block->types.pulses), &(it->block_state.pulses),
tstates, &end_of_block );
if( error ) return error;
break;
case LIBSPECTRUM_TAPE_BLOCK_PURE_DATA:
error = pure_data_edge( &(block->types.pure_data),
&(it->block_state.pure_data), tstates, &end_of_block);
if( error ) return error;
break;
case LIBSPECTRUM_TAPE_BLOCK_RAW_DATA:
error = raw_data_edge( &(block->types.raw_data), &(it->block_state.raw_data),
tstates, &end_of_block );
if( error ) return error;
break;
case LIBSPECTRUM_TAPE_BLOCK_GENERALISED_DATA:
error = generalised_data_edge( &(block->types.generalised_data),
&(it->block_state.generalised_data),
tstates, &end_of_block, flags );
if( error ) return error;
break;
case LIBSPECTRUM_TAPE_BLOCK_PAUSE:
*tstates = ( block->types.pause.length * 69888 ) / 20; end_of_block = 1;
/* 0 ms pause => stop tape */
if( *tstates == 0 ) { *flags |= LIBSPECTRUM_TAPE_FLAGS_STOP; }
break;
case LIBSPECTRUM_TAPE_BLOCK_JUMP:
error = jump_blocks( tape, block->types.jump.offset );
if( error ) return error;
*tstates = 0; end_of_block = 1; no_advance = 1;
break;
case LIBSPECTRUM_TAPE_BLOCK_LOOP_START:
if( it->current_block->next && block->types.loop_start.count ) {
it->loop_block = it->current_block->next;
it->loop_count = block->types.loop_start.count;
}
*tstates = 0; end_of_block = 1;
break;
case LIBSPECTRUM_TAPE_BLOCK_LOOP_END:
if( it->loop_block ) {
if( --(it->loop_count) ) {
it->current_block = it->loop_block;
no_advance = 1;
} else {
it->loop_block = NULL;
}
}
*tstates = 0; end_of_block = 1;
break;
case LIBSPECTRUM_TAPE_BLOCK_STOP48:
*tstates = 0; *flags |= LIBSPECTRUM_TAPE_FLAGS_STOP48; end_of_block = 1;
break;
/* For blocks which contain no Spectrum-readable data, return zero
tstates and set end of block set so we instantly get the next block */
case LIBSPECTRUM_TAPE_BLOCK_GROUP_START:
case LIBSPECTRUM_TAPE_BLOCK_GROUP_END:
case LIBSPECTRUM_TAPE_BLOCK_SELECT:
case LIBSPECTRUM_TAPE_BLOCK_COMMENT:
case LIBSPECTRUM_TAPE_BLOCK_MESSAGE:
case LIBSPECTRUM_TAPE_BLOCK_ARCHIVE_INFO:
case LIBSPECTRUM_TAPE_BLOCK_HARDWARE:
case LIBSPECTRUM_TAPE_BLOCK_CUSTOM:
*tstates = 0; end_of_block = 1;
break;
case LIBSPECTRUM_TAPE_BLOCK_RLE_PULSE:
error = rle_pulse_edge( &(block->types.rle_pulse),
&(it->block_state.rle_pulse), tstates, &end_of_block);
if( error ) return error;
break;
default:
*tstates = 0;
libspectrum_print_error(
LIBSPECTRUM_ERROR_LOGIC,
"libspectrum_tape_get_next_edge: unknown block type 0x%02x",
block->type
);
return LIBSPECTRUM_ERROR_LOGIC;
}
} else {
*tstates = 0;
end_of_block = 1;
}
/* If that ended the block, move onto the next block */
if( end_of_block ) {
*flags |= LIBSPECTRUM_TAPE_FLAGS_BLOCK;
/* Advance to the next block, unless we've been told not to */
if( !no_advance ) {
libspectrum_tape_iterator_next( &(it->current_block) );
/* If we've just hit the end of the tape, stop the tape (and
then `rewind' to the start) */
if( libspectrum_tape_iterator_current( it->current_block ) == NULL ) {
*flags |= LIBSPECTRUM_TAPE_FLAGS_STOP;
libspectrum_tape_iterator_init( &(it->current_block), tape );
}
}
/* Initialise the new block */
error = libspectrum_tape_block_init(
libspectrum_tape_iterator_current( it->current_block ),
it );
if( error ) return error;
}
return LIBSPECTRUM_ERROR_NONE;
}
static libspectrum_dword
find_sample_rate( libspectrum_tape *tape )
{
libspectrum_tape_iterator iterator;
libspectrum_tape_block *block;
libspectrum_dword sample_rate = 44100;
int found = 0;
/* FIXME: If tape has only one block that is a sampled type, just use it's rate
and if it RLE, we should just zlib and write */
for( block = libspectrum_tape_iterator_init( &iterator, tape );
block;
block = libspectrum_tape_iterator_next( &iterator ) )
{
switch( libspectrum_tape_block_type( block ) ) {
case LIBSPECTRUM_TAPE_BLOCK_RAW_DATA:
case LIBSPECTRUM_TAPE_BLOCK_RLE_PULSE:
{
libspectrum_dword block_rate =
3500000 / libspectrum_tape_block_bit_length( block );
if( found ) {
if( block_rate != sample_rate ) {
libspectrum_print_error(
LIBSPECTRUM_ERROR_WARNING,
"find_sample_rate: converting tape with mixed sample rates; conversion may well not work"
);
}
}
sample_rate = block_rate;
found = 1;
}
break;
case LIBSPECTRUM_TAPE_BLOCK_ROM:
case LIBSPECTRUM_TAPE_BLOCK_TURBO:
case LIBSPECTRUM_TAPE_BLOCK_PURE_TONE:
case LIBSPECTRUM_TAPE_BLOCK_PULSES:
case LIBSPECTRUM_TAPE_BLOCK_PURE_DATA:
case LIBSPECTRUM_TAPE_BLOCK_GENERALISED_DATA:
case LIBSPECTRUM_TAPE_BLOCK_PAUSE:
case LIBSPECTRUM_TAPE_BLOCK_GROUP_START:
case LIBSPECTRUM_TAPE_BLOCK_GROUP_END:
case LIBSPECTRUM_TAPE_BLOCK_JUMP:
case LIBSPECTRUM_TAPE_BLOCK_LOOP_START:
case LIBSPECTRUM_TAPE_BLOCK_LOOP_END:
case LIBSPECTRUM_TAPE_BLOCK_SELECT:
case LIBSPECTRUM_TAPE_BLOCK_STOP48:
case LIBSPECTRUM_TAPE_BLOCK_COMMENT:
case LIBSPECTRUM_TAPE_BLOCK_MESSAGE:
case LIBSPECTRUM_TAPE_BLOCK_ARCHIVE_INFO:
case LIBSPECTRUM_TAPE_BLOCK_HARDWARE:
case LIBSPECTRUM_TAPE_BLOCK_CUSTOM:
case LIBSPECTRUM_TAPE_BLOCK_CONCAT:
break;
default:
libspectrum_print_error(
LIBSPECTRUM_ERROR_LOGIC,
"libspectrum_csw_write: unknown block type 0x%02x",
libspectrum_tape_block_type( block )
);
}
}
return sample_rate;
}
libspectrum_error
internal_tzx_write( libspectrum_byte **buffer, size_t *length,
libspectrum_tape *tape )
{
libspectrum_error error;
libspectrum_tape_iterator iterator;
libspectrum_tape_block *block;
libspectrum_byte *ptr = *buffer;
size_t signature_length = strlen( libspectrum_tzx_signature );
/* First, write the .tzx signature and the version numbers */
libspectrum_make_room( buffer, signature_length + 2, &ptr, length );
memcpy( ptr, libspectrum_tzx_signature, signature_length );
ptr += signature_length;
*ptr++ = 1; /* Major version number */
*ptr++ = 20; /* Minor version number */
for( block = libspectrum_tape_iterator_init( &iterator, tape );
block;
block = libspectrum_tape_iterator_next( &iterator ) )
{
switch( libspectrum_tape_block_type( block ) ) {
case LIBSPECTRUM_TAPE_BLOCK_ROM:
tzx_write_rom( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_TURBO:
tzx_write_turbo( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_PURE_TONE:
tzx_write_pure_tone( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_PULSES:
tzx_write_pulses( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_PURE_DATA:
tzx_write_data( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_RAW_DATA:
tzx_write_raw_data( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_GENERALISED_DATA:
error = tzx_write_generalised_data( block, buffer, &ptr, length );
if( error != LIBSPECTRUM_ERROR_NONE ) { libspectrum_free( *buffer ); return error; }
break;
case LIBSPECTRUM_TAPE_BLOCK_PAUSE:
tzx_write_pause( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_GROUP_START:
tzx_write_group_start( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_GROUP_END:
tzx_write_empty_block( buffer, &ptr, length, libspectrum_tape_block_type( block ) );
break;
case LIBSPECTRUM_TAPE_BLOCK_JUMP:
tzx_write_jump( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_LOOP_START:
tzx_write_loop_start( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_LOOP_END:
tzx_write_empty_block( buffer, &ptr, length, libspectrum_tape_block_type( block ) );
break;
case LIBSPECTRUM_TAPE_BLOCK_SELECT:
tzx_write_select( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_STOP48:
tzx_write_stop( buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_COMMENT:
tzx_write_comment( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_MESSAGE:
tzx_write_message( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_ARCHIVE_INFO:
tzx_write_archive_info( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_HARDWARE:
tzx_write_hardware( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_CUSTOM:
tzx_write_custom( block, buffer, &ptr, length );
break;
case LIBSPECTRUM_TAPE_BLOCK_RLE_PULSE:
error = tzx_write_rle( block, buffer, &ptr, length, tape, iterator );
if( error != LIBSPECTRUM_ERROR_NONE ) { libspectrum_free( *buffer ); return error; }
break;
default:
libspectrum_free( *buffer );
libspectrum_print_error(
LIBSPECTRUM_ERROR_LOGIC,
"libspectrum_tzx_write: unknown block type 0x%02x",
libspectrum_tape_block_type( block )
);
return LIBSPECTRUM_ERROR_LOGIC;
}
}
(*length) = ptr - *buffer;
return LIBSPECTRUM_ERROR_NONE;
}