Hi ! I use libcdio for only a short time, and found it easy to use (good examples and documentation), except for mmc commands. Now, after long searches, I have understood how it works, and I have a suggestion: add a link to "http://www.13thmonkey.org/documentation/SCSI/mmc-r10a.pdf,"; on your doc (mmc.h - if not already done, maybe I haven't looked in the right place).
I want to use libcdio as an alternate method for device and media detection in my SimpleBurn project (http://simpleburn.tuxfamily.org - wait untill next version to have that libcdio detection feature). I wanted a function to tell me if a CD is rewritable or not, and didn't find it, so I wrote one (I have seen no other solution than using a mmc command); if you find it usefull, you can add it into libcdio: /*! Detects if a disc (CD or DVD) is erasable or not. See http://www.13thmonkey.org/documentation/SCSI/mmc-r10a.pdf, tables 129-134. @return true if the disc is erasable (rewritable), false otherwise. */ bool mmc_get_disc_erasable ( const CdIo_t *p_cdio) { mmc_cdb_t cdb = {{0, }}; uint8_t buf[42] = { 0, }; CDIO_MMC_SET_COMMAND (cdb.field, CDIO_MMC_GPCMD_READ_DISC_INFO); CDIO_MMC_SET_READ_LENGTH8 (cdb.field, sizeof(buf)); mmc_run_cmd (p_cdio, 0, &cdb, SCSI_MMC_DATA_READ, sizeof(buf), &buf); if (buf[2] & 0x10) //works even if the 'mmc_run_cmd' command fails return true; else return false; } If I have understood the source, even cdw doesn't use libcdio to detect a device type (it uses dvd+rw-tools or cdrtools output I guess). It could be interesting to add a feature to get more information on discs: (add some values to (mmc)discmode_t enumeration for example: CDIO_DISC_MODE_CD_R, CDIO_DISC_MODE_CD_RW, CDIO_DISC_MODE_CD_ROM), and a new function like: "mmcdiscmode_t mmc_get_discmode (CdIo *p_cdio)". Tell me if you are interested in this feature. Best regards ! Frank Endres
