diff options
Diffstat (limited to 'src/devices/imagedev/chd_cd.c')
-rw-r--r-- | src/devices/imagedev/chd_cd.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/src/devices/imagedev/chd_cd.c b/src/devices/imagedev/chd_cd.c new file mode 100644 index 00000000000..b506ebfa784 --- /dev/null +++ b/src/devices/imagedev/chd_cd.c @@ -0,0 +1,143 @@ +// license:BSD-3-Clause +// copyright-holders:Nathan Woods, R. Belmont, Miodrag Milanovic +/********************************************************************* + + 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 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, "CD-ROM Image", tag, owner, clock, "cdrom_image", __FILE__), + device_image_interface(mconfig, *this), + m_interface(NULL) +{ +} + +cdrom_image_device::cdrom_image_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source) + : device_t(mconfig, type, name, tag, owner, clock, shortname, source), + device_image_interface(mconfig, *this), + m_interface(NULL) +{ +} +//------------------------------------------------- +// 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() +{ + m_extension_list = "chd,cue,toc,nrg,gdi,iso,cdr"; + + m_formatlist.append(*global_alloc(image_device_format("chdcd", "CD-ROM drive", m_extension_list, cd_option_spec))); + + // 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() +{ + // try to locate the CHD from a DISK_REGION + chd_file *chd = get_disk_handle( machine(), owner()->tag() ); + if( chd != NULL ) + { + m_cdrom_handle = cdrom_open( chd ); + } + else + { + m_cdrom_handle = NULL; + } +} + +void cdrom_image_device::device_stop() +{ + if (m_cdrom_handle) + cdrom_close(m_cdrom_handle); + if( m_self_chd.opened() ) + m_self_chd.close(); +} + +bool cdrom_image_device::call_load() +{ + chd_error err = (chd_error)0; + chd_file *chd = NULL; + + if (m_cdrom_handle) + cdrom_close(m_cdrom_handle); + + if (software_entry() == NULL) + { + if (strstr(m_image_name.c_str(), ".chd") && is_loaded()) { + err = m_self_chd.open( *image_core_file() ); /* CDs are never writeable */ + if ( err ) + goto error; + chd = &m_self_chd; + } + } else { + chd = get_disk_handle(device().machine(), device().subtag("cdrom").c_str()); + } + + /* open the CHD file */ + if (chd) { + m_cdrom_handle = cdrom_open( chd ); + } else { + m_cdrom_handle = cdrom_open(m_image_name.c_str()); + } + if ( ! m_cdrom_handle ) + goto error; + + return IMAGE_INIT_PASS; + +error: + if ( chd && chd == &m_self_chd ) + m_self_chd.close( ); + if ( err ) + seterror( IMAGE_ERROR_UNSPECIFIED, chd_file::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; + if( m_self_chd.opened() ) + m_self_chd.close(); +} |