mirror of
https://github.com/libretro/beetle-psx-libretro.git
synced 2024-11-23 16:59:49 +00:00
270 lines
6.4 KiB
C++
270 lines
6.4 KiB
C++
/********************************************************
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* *
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* PC Engine CD Command 0xD8 - SAPSP *
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* *
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********************************************************/
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static void DoNEC_PCE_SAPSP(const uint8 *cdb)
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{
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uint32 new_read_sec_start;
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//printf("Set audio start: %02x %02x %02x %02x %02x %02x %02x\n", cdb[9], cdb[1], cdb[2], cdb[3], cdb[4], cdb[5], cdb[6]);
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switch (cdb[9] & 0xc0)
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{
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default: SCSIDBG("Unknown SAPSP 9: %02x\n", cdb[9]);
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case 0x00:
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new_read_sec_start = (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
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break;
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case 0x40:
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new_read_sec_start = AMSF_to_LBA(BCD_to_U8(cdb[2]), BCD_to_U8(cdb[3]), BCD_to_U8(cdb[4]));
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break;
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case 0x80:
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{
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int track = BCD_to_U8(cdb[2]);
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if(!track)
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track = 1;
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else if(track == toc.last_track + 1)
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track = 100;
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else if(track > toc.last_track)
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{
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CommandCCError(SENSEKEY_ILLEGAL_REQUEST, NSE_END_OF_VOLUME);
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return;
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}
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new_read_sec_start = toc.tracks[track].lba;
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}
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break;
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}
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//printf("%lld\n", (long long)(monotonic_timestamp - pce_lastsapsp_timestamp) * 1000 / System_Clock);
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if(cdda.CDDAStatus == CDDASTATUS_PLAYING && new_read_sec_start == read_sec_start && ((int64)(monotonic_timestamp - pce_lastsapsp_timestamp) * 1000 / System_Clock) < 190)
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{
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pce_lastsapsp_timestamp = monotonic_timestamp;
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SendStatusAndMessage(STATUS_GOOD, 0x00);
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CDIRQCallback(SCSICD_IRQ_DATA_TRANSFER_DONE);
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return;
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}
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pce_lastsapsp_timestamp = monotonic_timestamp;
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read_sec = read_sec_start = new_read_sec_start;
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read_sec_end = toc.tracks[100].lba;
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cdda.CDDAReadPos = 588;
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cdda.CDDAStatus = CDDASTATUS_PAUSED;
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cdda.PlayMode = PLAYMODE_SILENT;
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if(cdb[1])
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{
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cdda.PlayMode = PLAYMODE_NORMAL;
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cdda.CDDAStatus = CDDASTATUS_PLAYING;
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}
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if(read_sec < toc.tracks[100].lba)
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Cur_CDIF->HintReadSector(read_sec);
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SendStatusAndMessage(STATUS_GOOD, 0x00);
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CDIRQCallback(SCSICD_IRQ_DATA_TRANSFER_DONE);
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}
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/********************************************************
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* *
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* PC Engine CD Command 0xD9 - SAPEP *
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* *
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********************************************************/
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static void DoNEC_PCE_SAPEP(const uint8 *cdb)
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{
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uint32 new_read_sec_end;
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//printf("Set audio end: %02x %02x %02x %02x %02x %02x %02x\n", cdb[9], cdb[1], cdb[2], cdb[3], cdb[4], cdb[5], cdb[6]);
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switch (cdb[9] & 0xc0)
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{
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default: SCSIDBG("Unknown SAPEP 9: %02x\n", cdb[9]);
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case 0x00:
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new_read_sec_end = (cdb[3] << 16) | (cdb[4] << 8) | cdb[5];
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break;
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case 0x40:
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new_read_sec_end = BCD_to_U8(cdb[4]) + 75 * (BCD_to_U8(cdb[3]) + 60 * BCD_to_U8(cdb[2]));
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new_read_sec_end -= 150;
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break;
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case 0x80:
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{
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int track = BCD_to_U8(cdb[2]);
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if(!track)
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track = 1;
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else if(track == toc.last_track + 1)
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track = 100;
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else if(track > toc.last_track)
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{
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CommandCCError(SENSEKEY_ILLEGAL_REQUEST, NSE_END_OF_VOLUME);
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return;
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}
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new_read_sec_end = toc.tracks[track].lba;
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}
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break;
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}
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read_sec_end = new_read_sec_end;
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switch(cdb[1]) // PCE CD(TODO: Confirm these, and check the mode mask):
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{
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default:
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case 0x03: cdda.PlayMode = PLAYMODE_NORMAL;
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cdda.CDDAStatus = CDDASTATUS_PLAYING;
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break;
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case 0x02: cdda.PlayMode = PLAYMODE_INTERRUPT;
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cdda.CDDAStatus = CDDASTATUS_PLAYING;
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break;
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case 0x01: cdda.PlayMode = PLAYMODE_LOOP;
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cdda.CDDAStatus = CDDASTATUS_PLAYING;
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break;
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case 0x00: cdda.PlayMode = PLAYMODE_SILENT;
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cdda.CDDAStatus = CDDASTATUS_STOPPED;
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break;
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}
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SendStatusAndMessage(STATUS_GOOD, 0x00);
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}
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/********************************************************
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* *
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* PC Engine CD Command 0xDA - Pause *
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* *
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********************************************************/
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static void DoNEC_PCE_PAUSE(const uint8 *cdb)
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{
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if(cdda.CDDAStatus != CDDASTATUS_STOPPED) // Hmm, should we give an error if it tries to pause and it's already paused?
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{
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cdda.CDDAStatus = CDDASTATUS_PAUSED;
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SendStatusAndMessage(STATUS_GOOD, 0x00);
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}
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else // Definitely give an error if it tries to pause when no track is playing!
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{
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CommandCCError(SENSEKEY_ILLEGAL_REQUEST, NSE_AUDIO_NOT_PLAYING);
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}
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}
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/********************************************************
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* *
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* PC Engine CD Command 0xDD - Read Subchannel Q *
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* *
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********************************************************/
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static void DoNEC_PCE_READSUBQ(const uint8 *cdb)
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{
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uint8 *SubQBuf = cd.SubQBuf[QMode_Time];
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uint8 data_in[8192];
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memset(data_in, 0x00, 10);
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data_in[2] = SubQBuf[1]; // Track
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data_in[3] = SubQBuf[2]; // Index
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data_in[4] = SubQBuf[3]; // M(rel)
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data_in[5] = SubQBuf[4]; // S(rel)
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data_in[6] = SubQBuf[5]; // F(rel)
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data_in[7] = SubQBuf[7]; // M(abs)
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data_in[8] = SubQBuf[8]; // S(abs)
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data_in[9] = SubQBuf[9]; // F(abs)
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if(cdda.CDDAStatus == CDDASTATUS_PAUSED)
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data_in[0] = 2; // Pause
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else if(cdda.CDDAStatus == CDDASTATUS_PLAYING || cdda.CDDAStatus == CDDASTATUS_SCANNING) // FIXME: Is this the correct status code for scanning playback?
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data_in[0] = 0; // Playing
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else
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data_in[0] = 3; // Stopped
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DoSimpleDataIn(data_in, 10);
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}
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/********************************************************
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* *
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* PC Engine CD Command 0xDE - Get Directory Info *
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* *
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********************************************************/
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static void DoNEC_PCE_GETDIRINFO(const uint8 *cdb)
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{
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// Problems:
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// Returned data lengths on real PCE are not confirmed.
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// Mode 0x03 behavior not tested on real PCE
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uint8 data_in[2048];
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uint32 data_in_size = 0;
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memset(data_in, 0, sizeof(data_in));
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switch(cdb[1])
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{
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default: MDFN_DispMessage("Unknown GETDIRINFO Mode: %02x", cdb[1]);
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printf("Unknown GETDIRINFO Mode: %02x", cdb[1]);
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case 0x0:
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data_in[0] = U8_to_BCD(toc.first_track);
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data_in[1] = U8_to_BCD(toc.last_track);
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data_in_size = 2;
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break;
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case 0x1:
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{
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uint8 m, s, f;
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LBA_to_AMSF(toc.tracks[100].lba, &m, &s, &f);
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data_in[0] = U8_to_BCD(m);
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data_in[1] = U8_to_BCD(s);
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data_in[2] = U8_to_BCD(f);
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data_in_size = 3;
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}
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break;
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case 0x2:
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{
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uint8 m, s, f;
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int track = BCD_to_U8(cdb[2]);
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if(!track)
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track = 1;
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else if(cdb[2] == 0xAA)
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{
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track = 100;
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}
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else if(track > 99)
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{
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CommandCCError(SENSEKEY_ILLEGAL_REQUEST, NSE_INVALID_PARAMETER);
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return;
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}
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LBA_to_AMSF(toc.tracks[track].lba, &m, &s, &f);
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data_in[0] = U8_to_BCD(m);
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data_in[1] = U8_to_BCD(s);
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data_in[2] = U8_to_BCD(f);
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data_in[3] = toc.tracks[track].control;
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data_in_size = 4;
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}
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break;
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}
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DoSimpleDataIn(data_in, data_in_size);
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}
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