mirror of
https://github.com/ZDoom/gzdoom.git
synced 2024-11-14 08:31:23 +00:00
441 lines
8.4 KiB
C++
441 lines
8.4 KiB
C++
#ifdef _WIN32
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#include <io.h>
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#endif
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#include <string.h>
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#include <assert.h>
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#include "opl_mus_player.h"
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#include "doomtype.h"
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#include "fmopl.h"
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#include "w_wad.h"
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#include "templates.h"
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#include "c_cvars.h"
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#include "i_system.h"
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#include "stats.h"
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#include "v_text.h"
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#include "c_dispatch.h"
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#define IMF_RATE 700.0
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EXTERN_CVAR (Bool, opl_onechip)
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OPLmusicBlock *BlockForStats;
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OPLmusicBlock::OPLmusicBlock()
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{
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scoredata = NULL;
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NextTickIn = 0;
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TwoChips = !opl_onechip;
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Looping = false;
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io = NULL;
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io = new OPLio;
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}
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OPLmusicBlock::~OPLmusicBlock()
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{
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BlockForStats = NULL;
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delete io;
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}
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void OPLmusicBlock::ResetChips ()
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{
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TwoChips = !opl_onechip;
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ChipAccess.Enter();
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io->OPLdeinit ();
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io->OPLinit (TwoChips + 1);
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ChipAccess.Leave();
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}
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void OPLmusicBlock::Restart()
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{
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OPLstopMusic ();
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OPLplayMusic (127);
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MLtime = 0;
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playingcount = 0;
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}
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OPLmusicFile::OPLmusicFile (FILE *file, char *musiccache, int len)
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: ScoreLen (len)
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{
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if (io == NULL)
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{
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return;
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}
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scoredata = new BYTE[len];
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if (file)
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{
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if (fread (scoredata, 1, len, file) != (size_t)len)
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{
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delete[] scoredata;
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scoredata = NULL;
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return;
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}
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}
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else
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{
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memcpy(scoredata, &musiccache[0], len);
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}
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if (io->OPLinit (TwoChips + 1))
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{
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delete[] scoredata;
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scoredata = NULL;
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return;
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}
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// Check for RDosPlay raw OPL format
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if (((DWORD *)scoredata)[0] == MAKE_ID('R','A','W','A') &&
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((DWORD *)scoredata)[1] == MAKE_ID('D','A','T','A'))
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{
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RawPlayer = RDosPlay;
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if (*(WORD *)(scoredata + 8) == 0)
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{ // A clock speed of 0 is bad
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*(WORD *)(scoredata + 8) = 0xFFFF;
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}
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SamplesPerTick = LittleShort(*(WORD *)(scoredata + 8)) / ADLIB_CLOCK_MUL;
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}
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// Check for DosBox OPL dump
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else if (((DWORD *)scoredata)[0] == MAKE_ID('D','B','R','A') &&
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((DWORD *)scoredata)[1] == MAKE_ID('W','O','P','L') &&
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((DWORD *)scoredata)[2] == MAKE_ID(0,0,1,0))
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{
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RawPlayer = DosBox;
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SamplesPerTick = OPL_SAMPLE_RATE / 1000;
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ScoreLen = MIN<int>(len - 24, LittleLong(((DWORD *)scoredata)[4]));
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}
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// Check for modified IMF format (includes a header)
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else if (((DWORD *)scoredata)[0] == MAKE_ID('A','D','L','I') &&
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scoredata[4] == 'B' && scoredata[5] == 1)
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{
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int songlen;
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BYTE *max = scoredata + ScoreLen;
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RawPlayer = IMF;
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SamplesPerTick = OPL_SAMPLE_RATE / IMF_RATE;
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score = scoredata + 6;
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// Skip track and game name
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for (int i = 2; i != 0; --i)
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{
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while (score < max && *score++ != '\0') {}
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}
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if (score < max) score++; // Skip unknown byte
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if (score + 8 > max)
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{ // Not enough room left for song data
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delete[] scoredata;
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scoredata = NULL;
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return;
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}
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songlen = LittleLong(*(DWORD *)score);
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if (songlen != 0 && (songlen +=4) < ScoreLen - (score - scoredata))
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{
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ScoreLen = songlen + int(score - scoredata);
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}
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}
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Restart ();
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}
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OPLmusicFile::~OPLmusicFile ()
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{
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if (scoredata != NULL)
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{
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io->OPLdeinit ();
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delete[] scoredata;
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scoredata = NULL;
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}
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}
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bool OPLmusicFile::IsValid () const
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{
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return scoredata != NULL;
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}
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void OPLmusicFile::SetLooping (bool loop)
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{
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Looping = loop;
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}
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void OPLmusicFile::Restart ()
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{
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OPLmusicBlock::Restart();
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WhichChip = 0;
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if (RawPlayer == RDosPlay)
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{
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score = scoredata + 10;
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SamplesPerTick = LittleShort(*(WORD *)(scoredata + 8)) / ADLIB_CLOCK_MUL;
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}
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else if (RawPlayer == DosBox)
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{
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score = scoredata + 24;
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SamplesPerTick = OPL_SAMPLE_RATE / 1000;
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}
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else if (RawPlayer == IMF)
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{
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score = scoredata + 6;
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// Skip track and game name
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for (int i = 2; i != 0; --i)
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{
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while (*score++ != '\0') {}
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}
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score++; // Skip unknown byte
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if (*(DWORD *)score != 0)
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{
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score += 4; // Skip song length
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}
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}
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io->SetClockRate(SamplesPerTick);
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}
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bool OPLmusicBlock::ServiceStream (void *buff, int numbytes)
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{
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float *samples = (float *)buff;
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float *samples1;
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int numsamples = numbytes / sizeof(float);
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bool prevEnded = false;
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bool res = true;
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samples1 = samples;
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memset(buff, 0, numbytes);
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ChipAccess.Enter();
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while (numsamples > 0)
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{
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double ticky = NextTickIn;
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int tick_in = int(NextTickIn);
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int samplesleft = MIN(numsamples, tick_in);
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if (samplesleft > 0)
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{
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YM3812UpdateOne (0, samples1, samplesleft);
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if (TwoChips)
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{
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YM3812UpdateOne (1, samples1, samplesleft);
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}
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assert(NextTickIn == ticky);
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NextTickIn -= samplesleft;
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assert (NextTickIn >= 0);
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numsamples -= samplesleft;
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samples1 += samplesleft;
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}
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if (NextTickIn < 1)
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{
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int next = PlayTick();
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assert(next >= 0);
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if (next == 0)
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{ // end of song
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if (!Looping || prevEnded)
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{
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if (numsamples > 0)
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{
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YM3812UpdateOne (0, samples1, numsamples);
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if (TwoChips)
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{
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YM3812UpdateOne (1, samples1, numsamples);
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}
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}
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res = false;
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break;
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}
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else
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{
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// Avoid infinite loops from songs that do nothing but end
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prevEnded = true;
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Restart ();
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}
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}
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else
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{
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prevEnded = false;
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io->WriteDelay(next);
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NextTickIn += SamplesPerTick * next;
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assert (NextTickIn >= 0);
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MLtime += next;
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}
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}
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}
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ChipAccess.Leave();
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return res;
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}
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int OPLmusicFile::PlayTick ()
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{
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BYTE reg, data;
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if (RawPlayer == RDosPlay)
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{
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while (score < scoredata + ScoreLen)
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{
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data = *score++;
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reg = *score++;
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switch (reg)
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{
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case 0: // Delay
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if (data != 0)
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{
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return data;
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}
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break;
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case 2: // Speed change or OPL3 switch
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if (data == 0)
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{
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SamplesPerTick = LittleShort(*(WORD *)(score)) / ADLIB_CLOCK_MUL;
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io->SetClockRate(SamplesPerTick);
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score += 2;
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}
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else if (data == 1)
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{
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WhichChip = 0;
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}
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else if (data == 2)
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{
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WhichChip = 1;
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}
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break;
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case 0xFF: // End of song
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if (data == 0xFF)
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{
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return 0;
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}
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break;
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default: // It's something to stuff into the OPL chip
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if (WhichChip == 0 || TwoChips)
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{
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io->OPLwriteReg(WhichChip, reg, data);
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}
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break;
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}
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}
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}
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else if (RawPlayer == DosBox)
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{
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while (score < scoredata + ScoreLen)
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{
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reg = *score++;
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if (reg == 4)
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{
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reg = *score++;
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data = *score++;
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}
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else if (reg == 0)
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{ // One-byte delay
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return *score++ + 1;
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}
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else if (reg == 1)
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{ // Two-byte delay
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int delay = score[0] + (score[1] << 8) + 1;
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score += 2;
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return delay;
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}
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else if (reg == 2)
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{ // Select OPL chip 0
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WhichChip = 0;
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continue;
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}
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else if (reg == 3)
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{ // Select OPL chip 1
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WhichChip = 1;
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continue;
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}
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else
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{
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data = *score++;
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}
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if (WhichChip == 0 || TwoChips)
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{
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io->OPLwriteReg(WhichChip, reg, data);
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}
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}
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}
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else if (RawPlayer == IMF)
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{
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WORD delay = 0;
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while (delay == 0 && score + 4 - scoredata <= ScoreLen)
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{
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if (*(DWORD *)score == 0xFFFFFFFF)
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{ // This is a special value that means to end the song.
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return 0;
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}
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reg = score[0];
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data = score[1];
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delay = LittleShort(((WORD *)score)[1]);
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score += 4;
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io->OPLwriteReg (0, reg, data);
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}
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return delay;
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}
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return 0;
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}
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ADD_STAT (opl)
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{
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if (BlockForStats != NULL)
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{
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FString out;
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char star[3] = { TEXTCOLOR_ESCAPE, 'A', '*' };
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for (uint i = 0; i < BlockForStats->io->OPLchannels; ++i)
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{
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if (BlockForStats->channels[i].flags & CH_FREE)
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{
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star[1] = CR_BRICK + 'A';
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}
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else if (BlockForStats->channels[i].flags & CH_SUSTAIN)
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{
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star[1] = CR_ORANGE + 'A';
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}
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else if (BlockForStats->channels[i].flags & CH_SECONDARY)
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{
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star[1] = CR_BLUE + 'A';
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}
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else
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{
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star[1] = CR_GREEN + 'A';
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}
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out.AppendCStrPart (star, 3);
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}
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return out;
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}
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else
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{
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return YM3812GetVoiceString ();
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}
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}
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OPLmusicFile::OPLmusicFile(const OPLmusicFile *source, const char *filename)
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{
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ScoreLen = source->ScoreLen;
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scoredata = new BYTE[ScoreLen];
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memcpy(scoredata, source->scoredata, ScoreLen);
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SamplesPerTick = source->SamplesPerTick;
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RawPlayer = source->RawPlayer;
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score = source->score;
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TwoChips = source->TwoChips;
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WhichChip = 0;
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if (io != NULL)
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{
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delete io;
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}
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io = new DiskWriterIO(filename);
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io->OPLinit(TwoChips);
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Restart();
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}
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void OPLmusicFile::Dump()
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{
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int time;
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time = PlayTick();
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while (time != 0)
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{
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io->WriteDelay(time);
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time = PlayTick();
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}
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}
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