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Define more CD-DA magic numbers

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krcroft 2020-02-29 09:51:20 -08:00 • committed by Patryk Obara
parent a757f41ead
commit 459f7d32f9
1 changed files with 18 additions and 11 deletions
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29
src/dos/cdrom.h
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@ -38,17 +38,24 @@
#include "../libs/decoders/SDL_sound.h"
// CDROM data and audio format constants
#define BYTES_PER_RAW_REDBOOK_FRAME 2352
#define BYTES_PER_COOKED_REDBOOK_FRAME 2048
#define REDBOOK_FRAMES_PER_SECOND 75
#define REDBOOK_CHANNELS 2
#define REDBOOK_PCM_FRAMES_PER_SECOND 44100
#define MAX_REDBOOK_FRAMES 400000 // frames are Redbook's data unit
#define MAX_REDBOOK_SECTOR 399999 // a sector is the index to a frame
#define MAX_REDBOOK_TRACKS 99
#define MIN_REDBOOK_TRACKS 2 // One track plus the lead-out track
#define REDBOOK_PCM_BYTES_PER_MS 176.4f // 44.1 frames/ms * 4 bytes/frame
#define BYTES_PER_REDBOOK_PCM_FRAME 4 // 2 bytes/sample * 2 samples/frame
#define BYTES_PER_RAW_REDBOOK_FRAME 2352u
#define BYTES_PER_COOKED_REDBOOK_FRAME 2048u
#define REDBOOK_FRAMES_PER_SECOND 75u
#define REDBOOK_CHANNELS 2u
#define REDBOOK_BPS 2u // bytes per sample
#define REDBOOK_PCM_FRAMES_PER_SECOND 44100u // also CD Audio sampling rate
#define REDBOOK_FRAME_PADDING 150u // The relationship between High Sierra sectors and Redbook
// frames is described by the equation:
// Sector = Minute * 60 * 75 + Second * 75 + Frame - 150
#define MAX_REDBOOK_FRAMES 400000u // frames are Redbook's data unit
#define MAX_REDBOOK_SECTOR 399999u // a sector is the index to a frame
#define MAX_REDBOOK_TRACKS 99u // a CD can contain 99 playable tracks plus the remaining leadout
#define MIN_REDBOOK_TRACKS 2u // One track plus the lead-out track
#define REDBOOK_PCM_BYTES_PER_MS 176.4f // 44.1 frames/ms * 4 bytes/frame
#define BYTES_PER_REDBOOK_PCM_FRAME 4u // 2 bytes/sample * 2 samples/frame
#define MAX_REDBOOK_BYTES (MAX_REDBOOK_FRAMES * BYTES_PER_RAW_REDBOOK_FRAME) // length of a CDROM in bytes
#define MAX_REDBOOK_DURATION_MS (99 * 60 * 1000) // 99 minute CDROM in milliseconds
struct TMSF
{