/* Append to the current tape file in memory; returns 0 if a block was
saved or non-zero if there was an error at the emulator level, or tape
traps are not active */
int tape_save_trap( void )
{
libspectrum_tape_block *block;
libspectrum_byte parity, *data;
size_t length;
int i;
/* Do nothing if tape traps aren't active */
if( !settings_current.tape_traps || tape_recording ) return 2;
/* Check we're in the right ROM */
if( ! trap_check_rom() ) return 3;
block = libspectrum_tape_block_alloc( LIBSPECTRUM_TAPE_BLOCK_ROM );
/* The +2 here is for the flag and parity bytes */
length = DE + 2;
libspectrum_tape_block_set_data_length( block, length );
data = malloc( length * sizeof(libspectrum_byte) );
if( !data ) { free( block ); return 1; }
libspectrum_tape_block_set_data( block, data );
/* First, store the flag byte (and initialise the parity counter) */
data[0] = parity = A;
/* then the main body of the data, counting parity along the way */
for( i=0; i<DE; i++) {
libspectrum_byte b = readbyte_internal( IX+i );
parity ^= b;
data[i+1] = b;
}
/* And finally the parity byte */
data[ DE+1 ] = parity;
/* Give a 1 second pause after this block */
libspectrum_tape_block_set_pause( block, 1000 );
libspectrum_tape_append_block( tape, block );
tape_modified = 1;
ui_tape_browser_update( UI_TAPE_BROWSER_NEW_BLOCK, block );
/* And then return via the RET at #053E, except on Timex 2068 at #00E4 */
if ( machine_current->machine == LIBSPECTRUM_MACHINE_TC2068 ||
machine_current->machine == LIBSPECTRUM_MACHINE_TS2068 ) {
PC = 0x00e4;
} else {
PC = 0x053e;
}
return 0;
}
static int
append_inlay_file( char *inlay_file, libspectrum_tape *tape )
{
libspectrum_tape_block* block;
char *description;
libspectrum_byte* jpg_data; size_t jpg_length;
libspectrum_byte* custom_block_data; size_t custom_block_length;
block = libspectrum_tape_block_alloc( LIBSPECTRUM_TAPE_BLOCK_CUSTOM );
/* Get the description */
description = malloc( DESCRIPTION_BUFFER_LEN );
memcpy( description, "Picture ", DESCRIPTION_BUFFER_LEN );
libspectrum_tape_block_set_text( block, description );
/* Read in the data */
if( read_file( inlay_file, &jpg_data, &jpg_length ) ) {
free( description );
free( block );
return 1;
}
custom_block_length = jpg_length + 2;
custom_block_data = malloc( custom_block_length );
/* Picture format */
if( is_filetype( inlay_file, ".jpg" ) ) {
custom_block_data[0] = 1;
} else if( is_filetype( inlay_file, ".gif" ) ) {
custom_block_data[0] = 0;
} else {
free( custom_block_data );
return 1;
}
/* Picture description length 0 == "Inlay Card" */
custom_block_data[1] = 0;
/* and the JPG itself */
memcpy( custom_block_data + 2, jpg_data, jpg_length );
libspectrum_tape_block_set_data_length( block, custom_block_length );
libspectrum_tape_block_set_data( block, custom_block_data );
/* Finally, put the block into the block list */
libspectrum_tape_append_block( tape, block );
return 0;
}
libspectrum_error
libspectrum_z80em_read( libspectrum_tape *tape,
const libspectrum_byte *buffer, size_t length )
{
libspectrum_tape_block *block;
libspectrum_tape_rle_pulse_block *z80em_block;
static const char id[] = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0Raw tape sample";
if( length < sizeof( id ) ) {
libspectrum_print_error(
LIBSPECTRUM_ERROR_CORRUPT,
"libspectrum_z80em_read: not enough data in buffer"
);
return LIBSPECTRUM_ERROR_CORRUPT;
}
if( memcmp( id, buffer, sizeof( id ) ) ) {
libspectrum_print_error( LIBSPECTRUM_ERROR_SIGNATURE,
"libspectrum_z80em_read: wrong signature" );
return LIBSPECTRUM_ERROR_SIGNATURE;
}
block = libspectrum_tape_block_alloc( LIBSPECTRUM_TAPE_BLOCK_RLE_PULSE );
z80em_block = &block->types.rle_pulse;
z80em_block->scale = 7; /* 1 time unit == 7 clock ticks */
buffer += sizeof( id );
length -= sizeof( id );
/* Claim memory for the data (it's one big lump) */
z80em_block->length = length;
z80em_block->data = libspectrum_new( libspectrum_byte, length );
/* Copy the data across */
memcpy( z80em_block->data, buffer, length );
libspectrum_tape_append_block( tape, block );
return LIBSPECTRUM_ERROR_NONE;
}
static int
append_scr_file( char *scr_file, libspectrum_tape *tape )
{
libspectrum_tape_block* block;
char *description;
libspectrum_byte* scr_data; size_t scr_length;
libspectrum_byte* custom_block_data; size_t custom_block_length;
block = libspectrum_tape_block_alloc( LIBSPECTRUM_TAPE_BLOCK_CUSTOM );
/* Get the description */
description = malloc( DESCRIPTION_BUFFER_LEN );
memcpy( description, "Spectrum Screen ", DESCRIPTION_BUFFER_LEN );
libspectrum_tape_block_set_text( block, description );
/* Read in the data */
if( read_file( scr_file, &scr_data, &scr_length ) ) {
free( description );
free( block );
return 1;
}
custom_block_length = scr_length + 2;
custom_block_data = malloc( custom_block_length );
/* Picture description length 0 == "Loading Screen" */
custom_block_data[0] = 0;
/* Border colour 0 == black */
custom_block_data[1] = 0;
/* and the SCR itself */
memcpy( custom_block_data + 2, scr_data, scr_length );
libspectrum_tape_block_set_data_length( block, custom_block_length );
libspectrum_tape_block_set_data( block, custom_block_data );
/* Finally, put the block into the block list */
libspectrum_tape_append_block( tape, block );
return 0;
}
int
tape_record_stop( void )
{
libspectrum_tape_block* block;
/* put last sample into the recording buffer */
rec_state.tape_buffer_used = write_rec_buffer( rec_state.tape_buffer,
rec_state.tape_buffer_used,
rec_state.last_level_count );
/* stop scheduling events and turn buffer into a block and
pop into the current tape */
event_remove_type( record_event );
block = libspectrum_tape_block_alloc( LIBSPECTRUM_TAPE_BLOCK_RLE_PULSE );
libspectrum_tape_block_set_scale( block, rec_state.tstates_per_sample );
libspectrum_tape_block_set_data_length( block, rec_state.tape_buffer_used );
libspectrum_tape_block_set_data( block, rec_state.tape_buffer );
libspectrum_tape_append_block( tape, block );
rec_state.tape_buffer = NULL;
rec_state.tape_buffer_size = 0;
rec_state.tape_buffer_used = 0;
tape_modified = 1;
ui_tape_browser_update( UI_TAPE_BROWSER_NEW_BLOCK, block );
tape_recording = 0;
/* Also want to reenable other tape actions */
ui_menu_activate( UI_MENU_ITEM_TAPE_RECORDING, 0 );
return 0;
}
libspectrum_error
libspectrum_wav_read( libspectrum_tape *tape, const char *filename )
{
libspectrum_byte *buffer; size_t length;
libspectrum_byte *tape_buffer; size_t tape_length;
size_t data_length;
libspectrum_tape_block *block = NULL;
int frames;
/* Our filehandle from libaudiofile */
AFfilehandle handle;
/* The track we're using in the file */
int track = AF_DEFAULT_TRACK;
if( !filename ) {
libspectrum_print_error(
LIBSPECTRUM_ERROR_LOGIC,
"libspectrum_wav_read: no filename provided - wav files can only be loaded from a file"
);
return LIBSPECTRUM_ERROR_LOGIC;
}
handle = afOpenFile( filename, "r", NULL );
if( handle == AF_NULL_FILEHANDLE ) {
libspectrum_print_error(
LIBSPECTRUM_ERROR_LOGIC,
"libspectrum_wav_read: audiofile failed to open file:%s", filename
);
return LIBSPECTRUM_ERROR_LOGIC;
}
if( afSetVirtualSampleFormat( handle, track, AF_SAMPFMT_UNSIGNED, 8 ) ) {
afCloseFile( handle );
libspectrum_print_error(
LIBSPECTRUM_ERROR_LOGIC,
"libspectrum_wav_read: audiofile failed to set virtual sample format"
);
return LIBSPECTRUM_ERROR_LOGIC;
}
if( afSetVirtualChannels( handle, track, 1 ) ) {
afCloseFile( handle );
libspectrum_print_error(
LIBSPECTRUM_ERROR_LOGIC,
"libspectrum_wav_read: audiofile failed to set virtual channel count"
);
return LIBSPECTRUM_ERROR_LOGIC;
}
length = afGetFrameCount( handle, track );
tape_length = length;
if( tape_length%8 ) tape_length += 8 - (tape_length%8);
buffer = libspectrum_new0( libspectrum_byte,
tape_length * afGetChannels(handle, track) );
frames = afReadFrames( handle, track, buffer, length );
if( frames == -1 ) {
libspectrum_free( buffer );
afCloseFile( handle );
libspectrum_print_error(
LIBSPECTRUM_ERROR_CORRUPT,
"libspectrum_wav_read: can't calculate number of frames in audio file"
);
return LIBSPECTRUM_ERROR_CORRUPT;
}
if( !length ) {
libspectrum_free( buffer );
afCloseFile( handle );
libspectrum_print_error(
LIBSPECTRUM_ERROR_CORRUPT,
"libspectrum_wav_read: empty audio file, nothing to load"
);
return LIBSPECTRUM_ERROR_CORRUPT;
}
if( frames != length ) {
libspectrum_free( buffer );
afCloseFile( handle );
libspectrum_print_error(
LIBSPECTRUM_ERROR_CORRUPT,
"libspectrum_wav_read: read %d frames, but expected %lu\n", frames,
(unsigned long)length
);
return LIBSPECTRUM_ERROR_CORRUPT;
}
block = libspectrum_tape_block_alloc( LIBSPECTRUM_TAPE_BLOCK_RAW_DATA );
/* 44100 Hz 79 t-states 22050 Hz 158 t-states */
libspectrum_tape_block_set_bit_length( block,
3500000/afGetRate( handle, track ) );
libspectrum_set_pause_ms( block, 0 );
libspectrum_tape_block_set_bits_in_last_byte( block,
length % LIBSPECTRUM_BITS_IN_BYTE ?
length % LIBSPECTRUM_BITS_IN_BYTE : LIBSPECTRUM_BITS_IN_BYTE );
data_length = tape_length / LIBSPECTRUM_BITS_IN_BYTE;
libspectrum_tape_block_set_data_length( block, data_length );
tape_buffer = libspectrum_new0( libspectrum_byte, data_length );
libspectrum_byte *from = buffer;
libspectrum_byte *to = tape_buffer;
length = tape_length;
do {
libspectrum_byte val = 0;
int i;
for( i = 7; i >= 0; i-- ) {
if( *from++ > 127 ) val |= 1 << i;
}
*to++ = val;
} while ((length -= 8) > 0);
libspectrum_tape_block_set_data( block, tape_buffer );
libspectrum_tape_append_block( tape, block );
if( afCloseFile( handle ) ) {
libspectrum_free( buffer );
libspectrum_print_error(
LIBSPECTRUM_ERROR_UNKNOWN,
"libspectrum_wav_read: failed to close audio file"
);
return LIBSPECTRUM_ERROR_UNKNOWN;
}
libspectrum_free( buffer );
/* Successful completion */
return LIBSPECTRUM_ERROR_NONE;
}
/* Convert RLE block to a TZX DRB as TZX CSW block support is limited :/ */
static libspectrum_error
tzx_write_rle( libspectrum_tape_block *block, libspectrum_byte **buffer,
libspectrum_byte **ptr, size_t *length,
libspectrum_tape *tape,
libspectrum_tape_iterator iterator )
{
libspectrum_error error;
libspectrum_tape_block_state it;
libspectrum_dword scale = libspectrum_tape_block_scale( block );
libspectrum_dword pulse_tstates = 0;
libspectrum_dword balance_tstates = 0;
int flags = 0;
libspectrum_tape_block *raw_block =
libspectrum_tape_block_alloc( LIBSPECTRUM_TAPE_BLOCK_RAW_DATA );
libspectrum_tape_block_set_bit_length( raw_block, scale );
libspectrum_tape_block_set_pause ( raw_block, 0 );
rle_state.bits_used = 0;
rle_state.level = 0;
rle_state.length = 0;
rle_state.tape_length = 8192;
rle_state.tape_buffer = libspectrum_malloc( rle_state.tape_length );
*rle_state.tape_buffer = 0;
it.current_block = iterator;
error = libspectrum_tape_block_init( block, &it );
if( error != LIBSPECTRUM_ERROR_NONE ) {
libspectrum_free( rle_state.tape_buffer );
libspectrum_tape_block_free( raw_block );
return error;
}
while( !(flags & LIBSPECTRUM_TAPE_FLAGS_BLOCK) ) {
libspectrum_dword pulse_length = 0;
/* Use internal version of this that doesn't bugger up the
external tape status */
error = libspectrum_tape_get_next_edge_internal( &pulse_tstates, &flags,
tape, &it );
if( error != LIBSPECTRUM_ERROR_NONE ) {
libspectrum_free( rle_state.tape_buffer );
libspectrum_tape_block_free( raw_block );
return error;
}
balance_tstates += pulse_tstates;
/* next set of pulses is: balance_tstates / scale; */
pulse_length = balance_tstates / scale;
balance_tstates = balance_tstates % scale;
/* write pulse_length bits of the current level into the buffer */
write_pulse( pulse_length );
}
if( rle_state.length || rle_state.bits_used ) {
if( rle_state.bits_used ) {
rle_state.length++;
} else {
rle_state.bits_used = 8;
}
error = libspectrum_tape_block_set_bits_in_last_byte( raw_block,
rle_state.bits_used );
if( error != LIBSPECTRUM_ERROR_NONE ) {
libspectrum_free( rle_state.tape_buffer );
libspectrum_tape_block_free( raw_block );
return error;
}
error = libspectrum_tape_block_set_data_length( raw_block,
rle_state.length );
if( error != LIBSPECTRUM_ERROR_NONE ) {
libspectrum_free( rle_state.tape_buffer );
libspectrum_tape_block_free( raw_block );
return error;
}
error = libspectrum_tape_block_set_data( raw_block, rle_state.tape_buffer );
if( error != LIBSPECTRUM_ERROR_NONE ) {
libspectrum_free( rle_state.tape_buffer );
libspectrum_tape_block_free( raw_block );
return error;
}
/* now have tzx_write_raw_data finish the job */
tzx_write_raw_data( raw_block, buffer, ptr, length );
} else {
libspectrum_free( rle_state.tape_buffer );
}
return libspectrum_tape_block_free( raw_block );
}
