diff options
Diffstat (limited to 'trunk/src/emu/imagedev/chd_cd.c')
-rw-r--r-- | trunk/src/emu/imagedev/chd_cd.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/trunk/src/emu/imagedev/chd_cd.c b/trunk/src/emu/imagedev/chd_cd.c new file mode 100644 index 00000000000..dea7020cf1f --- /dev/null +++ b/trunk/src/emu/imagedev/chd_cd.c @@ -0,0 +1,165 @@ +/********************************************************************* + + Code to interface the image code with CHD-CD core. + + Based on harddriv.c by Raphael Nabet 2003 + +*********************************************************************/ + +#include "emu.h" +#include "cdrom.h" +#include "chd_cd.h" + + +static const char *const error_strings[] = +{ + "no error", + "no drive interface", + "out of memory", + "invalid file", + "invalid parameter", + "invalid data", + "file not found", + "requires parent", + "file not writeable", + "read error", + "write error", + "codec error", + "invalid parent", + "hunk out of range", + "decompression error", + "compression error", + "can't create file", + "can't verify file" + "operation not supported", + "can't find metadata", + "invalid metadata size", + "unsupported CHD version" +}; + +static const char *chd_get_error_string(int chderr) +{ + if ((chderr < 0 ) || (chderr >= ARRAY_LENGTH(error_strings))) + return NULL; + return error_strings[chderr]; +} + + +static OPTION_GUIDE_START(cd_option_guide) + OPTION_INT('K', "hunksize", "Hunk Bytes") +OPTION_GUIDE_END + +static const char cd_option_spec[] = "K512/1024/2048/[4096]"; + +// device type definition +const device_type CDROM = &device_creator<cdrom_image_device>; + +//------------------------------------------------- +// cdrom_image_device - constructor +//------------------------------------------------- + +cdrom_image_device::cdrom_image_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : device_t(mconfig, CDROM, "Cdrom", tag, owner, clock), + device_image_interface(mconfig, *this) +{ + +} + +//------------------------------------------------- +// cdrom_image_device - destructor +//------------------------------------------------- + +cdrom_image_device::~cdrom_image_device() +{ +} + +//------------------------------------------------- +// device_config_complete - perform any +// operations now that the configuration is +// complete +//------------------------------------------------- + +void cdrom_image_device::device_config_complete() +{ + // inherit a copy of the static data + const cdrom_interface *intf = reinterpret_cast<const cdrom_interface *>(static_config()); + if (intf != NULL) + *static_cast<cdrom_interface *>(this) = *intf; + + // or initialize to defaults if none provided + else + { + memset(&m_interface, 0, sizeof(m_interface)); + memset(&m_device_displayinfo, 0, sizeof(m_device_displayinfo)); + } + + image_device_format *format = global_alloc_clear(image_device_format);; + format->m_index = 0; + format->m_name = "chdcd"; + format->m_description = "CD-ROM drive"; + format->m_extensions = "chd,cue,toc,nrg,gdi"; + format->m_optspec = cd_option_spec; + format->m_next = NULL; + + m_formatlist = format; + + // set brief and instance name + update_names(); +} + +const option_guide *cdrom_image_device::create_option_guide() const +{ + return cd_option_guide; +} + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void cdrom_image_device::device_start() +{ + m_cdrom_handle = NULL; +} + +bool cdrom_image_device::call_load() +{ + chd_error err = (chd_error)0; + chd_file *chd = NULL; + astring tempstring; + + if (software_entry() == NULL) + { + if (strstr(m_image_name,".chd")) { + err = chd_open_file( image_core_file(), CHD_OPEN_READ, NULL, &chd ); /* CDs are never writeable */ + if ( err ) + goto error; + } + } else { + chd = get_disk_handle(device().machine(), device().subtag(tempstring,"cdrom")); + } + + /* open the CHD file */ + if (chd) { + m_cdrom_handle = cdrom_open( chd ); + } else { + m_cdrom_handle = cdrom_open( m_image_name ); + } + if ( ! m_cdrom_handle ) + goto error; + + return IMAGE_INIT_PASS; + +error: + if ( chd ) + chd_close( chd ); + if ( err ) + seterror( IMAGE_ERROR_UNSPECIFIED, chd_get_error_string( err ) ); + return IMAGE_INIT_FAIL; +} + +void cdrom_image_device::call_unload() +{ + assert(m_cdrom_handle); + cdrom_close(m_cdrom_handle); + m_cdrom_handle = NULL; +} |