1 /*************************************************************************************** 2 * Genesis Plus 3 * CD drive processor & CD-DA fader 4 * 5 * Copyright (C) 2012-2018 Eke-Eke (Genesis Plus GX) 6 * 7 * Redistribution and use of this code or any derivative works are permitted 8 * provided that the following conditions are met: 9 * 10 * - Redistributions may not be sold, nor may they be used in a commercial 11 * product or activity. 12 * 13 * - Redistributions that are modified from the original source must include the 14 * complete source code, including the source code for all components used by a 15 * binary built from the modified sources. However, as a special exception, the 16 * source code distributed need not include anything that is normally distributed 17 * (in either source or binary form) with the major components (compiler, kernel, 18 * and so on) of the operating system on which the executable runs, unless that 19 * component itself accompanies the executable. 20 * 21 * - Redistributions must reproduce the above copyright notice, this list of 22 * conditions and the following disclaimer in the documentation and/or other 23 * materials provided with the distribution. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 * 37 ****************************************************************************************/ 38 #ifndef _HW_CDD_ 39 #define _HW_CDD_ 40 41 #include "blip_buf.h" 42 43 #if defined(USE_LIBVORBIS) 44 #include <vorbis/vorbisfile.h> 45 #elif defined(USE_LIBTREMOR) 46 #include "tremor/ivorbisfile.h" 47 #endif 48 49 #if defined(USE_LIBCHDR) 50 #include "libchdr/src/chd.h" 51 #include "libchdr/src/cdrom.h" 52 #endif 53 54 #define cdd scd.cdd_hw 55 56 /* CDD status */ 57 #define CD_BUSY 0x00 58 #define CD_PLAY 0x01 59 #define CD_SEEK 0x02 60 #define CD_SCAN 0x03 61 #define CD_PAUSE 0x04 62 #define CD_OPEN 0x05 63 #define CD_STOP 0x09 64 #define NO_DISC 0x0B 65 #define CD_END 0x0C 66 67 /* CD track */ 68 typedef struct 69 { 70 cdStream *fd; 71 #if defined(USE_LIBTREMOR) || defined(USE_LIBVORBIS) 72 OggVorbis_File vf; 73 #endif 74 int offset; 75 int start; 76 int end; 77 int type; 78 } track_t; 79 80 /* CD TOC */ 81 typedef struct 82 { 83 int end; 84 int last; 85 track_t tracks[100]; 86 cdStream *sub; 87 } toc_t; 88 89 #if defined(USE_LIBCHDR) 90 /* CHD file */ 91 typedef struct 92 { 93 chd_file *file; 94 uint8 *hunk; 95 int hunkbytes; 96 int hunknum; 97 int hunkofs; 98 } chd_t; 99 #endif 100 101 /* CDD hardware */ 102 typedef struct 103 { 104 uint32 cycles; 105 uint32 latency; 106 int loaded; 107 int index; 108 int lba; 109 int scanOffset; 110 int volume; 111 uint8 status; 112 uint16 sectorSize; 113 toc_t toc; 114 #if defined(USE_LIBCHDR) 115 chd_t chd; 116 #endif 117 int16 audio[2]; 118 int audioSampleOffset; 119 } cdd_t; 120 121 /* Function prototypes */ 122 extern void cdd_init(int samplerate); 123 extern void cdd_reset(void); 124 extern int cdd_context_save(uint8 *state); 125 extern int cdd_context_load(uint8 *state); 126 extern int cdd_load(char *filename, char *header); 127 extern void cdd_unload(void); 128 extern void cdd_read_data(uint8 *dst, uint8 *subheader); 129 extern void cdd_read_audio(unsigned int samples); 130 extern void cdd_update(void); 131 extern void cdd_process(void); 132 133 #endif 134