/* ScummVM - Graphic Adventure Engine * * ScummVM is the legal property of its developers, whose names * are too numerous to list here. Please refer to the COPYRIGHT * file distributed with this source distribution. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * */ #include "cdaudio.h" #include "backends/fs/ds/ds-fs.h" #include "common/config-manager.h" #include "dsmain.h" #include "NDS/scummvm_ipc.h" #define WAV_FORMAT_IMA_ADPCM 0x14 #define BUFFER_SIZE 8192 #define BUFFER_CHUNK_SIZE (BUFFER_SIZE >> 2) namespace DS { namespace CD { struct WaveHeader { char riff[4]; // 'RIFF' u32 size; // Size of the file char wave[4]; // 'WAVE' // fmt chunk char fmt[4]; // 'fmt ' u32 fmtSize; // Chunk size u16 fmtFormatTag; // Format of this file u16 fmtChannels; // Num channels u32 fmtSamPerSec; // Samples per second u32 fmtBytesPerSec; // Bytes per second u16 fmtBlockAlign; // Block alignment u16 fmtBitsPerSam; // Bits per sample u16 fmtExtraData; // Number of extra fmt bytes u16 fmtExtra; // Samples per block (only for IMA-ADPCM files) } __attribute__ ((packed)); struct chunkHeader { char name[4]; u32 size; } __attribute__ ((packed)); struct Header { s16 firstSample; char stepTableIndex; char reserved; } __attribute__ ((packed)); struct decoderFormat { s16 initial; unsigned char tableIndex; unsigned char test; unsigned char sample[1024]; } __attribute__ ((packed)); bool active = false; WaveHeader waveHeader; Header blockHeader; FILE* file; int fillPos; bool isPlayingFlag = false; s16* audioBuffer; u32 sampleNum; s16* decompressionBuffer; int numLoops; int blockCount; int dataChunkStart; int blocksLeft; bool trackStartsAt2 = false; // These are from Microsoft's document on DVI ADPCM const int stepTab[ 89 ] = { 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 19, 21, 23, 25, 28, 31, 34, 37, 41, 45, 50, 55, 60, 66, 73, 80, 88, 97, 107, 118, 130, 143, 157, 173, 190, 209, 230, 253, 279, 307, 337, 371, 408, 449, 494, 544, 598, 658, 724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066, 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358, 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899, 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767 }; const int indexTab[ 16 ] = { -1, -1, -1, -1, 2, 4, 6, 8, -1, -1, -1, -1, 2, 4, 6, 8 }; void playNextBlock(); void decompressBlock(); void allocBuffers() { } void setActive(bool active) { DS::CD::active = active; } bool getActive() { return active; } void playTrack(int track, int numLoops, int startFrame, int duration) { Common::String path = ConfMan.get("path"); if (isPlayingFlag) { stopTrack(); } if (trackStartsAt2) { track++; } char str[100]; if (path[strlen(path.c_str()) - 1] != '/') { path = path + "/"; } Common::String fname; sprintf(str, "track%d.wav", track); fname = path + str; file = DS::std_fopen(fname.c_str(), "rb"); if (!file) { sprintf(str, "track%02d.wav", track); fname = path + str; file = DS::std_fopen(fname.c_str(), "rb"); } if (!file) { consolePrintf("Failed to open %s!\n", path.c_str()); return; } DS::std_fread((const void *) &waveHeader, sizeof(waveHeader), 1, file); consolePrintf("File: %s\n", fname.c_str()); consolePrintf("Playing track %d\n", track); consolePrintf("Format: %d\n", waveHeader.fmtFormatTag); consolePrintf("Rate : %d\n", waveHeader.fmtSamPerSec); consolePrintf("Bits : %d\n", waveHeader.fmtBitsPerSam); consolePrintf("BlkSz : %d\n", waveHeader.fmtExtra); if ((waveHeader.fmtFormatTag != 17) && (waveHeader.fmtFormatTag != 20)) { consolePrintf("Wave file is in the wrong format! You must use IMA-ADPCM 4-bit mono.\n"); DS::std_fclose(file); return; } for (int r = 0; r < 8; r++) { IPC->adpcm.buffer[r] = (u8 * volatile) (decoderFormat *) malloc(waveHeader.fmtBlockAlign); IPC->adpcm.filled[r] = false; IPC->adpcm.arm7Dirty[r] = false; } // Skip chunks until we reach the data chunk chunkHeader chunk; DS::std_fread((const void *) &chunk, sizeof(chunkHeader), 1, file); while (!((chunk.name[0] == 'd') && (chunk.name[1] == 'a') && (chunk.name[2] == 't') && (chunk.name[3] == 'a'))) { DS::std_fseek(file, chunk.size, SEEK_CUR); DS::std_fread((const void *) &chunk, sizeof(chunkHeader), 1, file); } dataChunkStart = DS::std_ftell(file); static bool started = false; sampleNum = 0; blockCount = 0; IPC->streamFillNeeded[0] = true; IPC->streamFillNeeded[1] = true; IPC->streamFillNeeded[2] = true; IPC->streamFillNeeded[3] = true; if (!started) { fillPos = 0; audioBuffer = (s16 *) malloc(BUFFER_SIZE * 2); decompressionBuffer = (s16 *) malloc(waveHeader.fmtExtra * 2); started = true; // consolePrintf("****Starting buffer*****\n"); memset(audioBuffer, 0, BUFFER_SIZE * 2); memset(decompressionBuffer, 0, waveHeader.fmtExtra * 2); DS::playSound(audioBuffer, BUFFER_SIZE * 2, false, false, waveHeader.fmtSamPerSec); } fillPos = (IPC->streamPlayingSection + 1) & 3; isPlayingFlag = true; // Startframe is a 75Hz timer. Dunno why, since nothing else // seems to run at that rate. int tenths = (startFrame * 10) / 75; // Seek to the nearest block start to the start time int samples = (tenths * waveHeader.fmtSamPerSec) / 10; int block = samples / waveHeader.fmtExtra; if (duration == 0) { blocksLeft = 0; } else { blocksLeft = ((((duration * 100) / 75) * (waveHeader.fmtSamPerSec)) / (waveHeader.fmtExtra) / 100) + 10; } // consolePrintf("Playing %d blocks (%d)\n\n", blocksLeft, duration); // No need to seek if we're starting from the beginning if (block != 0) { DS::std_fseek(file, dataChunkStart + block * waveHeader.fmtBlockAlign, SEEK_SET); // consolePrintf("Startframe: %d msec: %d (%d,%d)\n", startFrame, tenthssec, samples, block); } //decompressBlock(); playNextBlock(); DS::CD::numLoops = numLoops; } void update() { playNextBlock(); } #ifdef ARM_ADPCM extern "C" void ARM_adcpm(int *block, int len, int stepTableIndex, int firstSample, s16 *decompressionBuffer); #endif void decompressBlock() { int block[2048]; bool loop = false; blockCount++; if (blockCount < 10) return; do { DS::std_fread((const void *) &blockHeader, sizeof(blockHeader), 1, file); DS::std_fread(&block[0], waveHeader.fmtBlockAlign - sizeof(blockHeader), 1, file); if (DS::std_feof(file) ) { // Reached end of file, so loop if ((numLoops == -1) || (numLoops > 1)) { // Seek file to first packet if (numLoops != -1) { numLoops--; } DS::std_fseek(file, dataChunkStart, SEEK_SET); loop = true; } else { // Fill decompression buffer with zeros to prevent glitching for (int r = 0; r < waveHeader.fmtExtra; r++) { decompressionBuffer[r] = 0; } // consolePrintf("Stopping music\n"); stopTrack(); return; } } else { loop = false; } } while (loop); if (blocksLeft > 0) { blocksLeft--; // consolePrintf("%d ", blocksLeft); if (blocksLeft == 0) { stopTrack(); return; } } #ifdef ARM_ADPCM ARM_adpcm(block, waveHeader.fmtExtra, blockHeader.stepTableIndex, blockHeader.firstSample, decompressionBuffer); #else // First sample is in header decompressionBuffer[0] = blockHeader.firstSample; // Set up initial table indeces int stepTableIndex = blockHeader.stepTableIndex; int prevSample = blockHeader.firstSample; // consolePrintf("Decompressing block step=%d fs=%d\n", stepTableIndex, prevSample); for (int r = 0; r < waveHeader.fmtExtra - 1; r++) { int word = block[r >> 3]; int offset = 0; switch (7 - (r & 0x0007)) { case 0: { offset = (word & 0xF0000000) >> 28; break; } case 1: { offset = (word & 0x0F000000) >> 24; break; } case 2: { offset = (word & 0x00F00000) >> 20; break; } case 3: { offset = (word & 0x000F0000) >> 16; break; } case 4: { offset = (word & 0x0000F000) >> 12; break; } case 5: { offset = (word & 0x00000F00) >> 8; break; } case 6: { offset = (word & 0x000000F0) >> 4; break; } case 7: { offset = (word & 0x0000000F); break; } } int diff = 0; if (offset & 4) { diff = diff + stepTab[stepTableIndex]; } if (offset & 2) { diff = diff + (stepTab[stepTableIndex] >> 1); } if (offset & 1) { diff = diff + (stepTab[stepTableIndex] >> 2); } diff = diff + (stepTab[stepTableIndex] >> 3); if (offset & 8) { diff = -diff; } int newSample = prevSample + diff; if (newSample > 32767) newSample = 32767; if (newSample < -32768) newSample = -32768; decompressionBuffer[r + 1] = newSample; prevSample = newSample; stepTableIndex += indexTab[offset]; if (stepTableIndex > 88) stepTableIndex = 88; if (stepTableIndex < 0) stepTableIndex = 0; } #endif } void playNextBlock() { if (!isPlayingFlag) return; int lastBlockId = -1; while (IPC->adpcm.semaphore); // Wait for buffer to become free if needed IPC->adpcm.semaphore = true; // Lock the buffer structure to prevent clashing with the ARM7 // DC_FlushAll(); //-8644, 25088 for (int block = fillPos + 1; block < fillPos + 4; block++) { int blockId = block & 3; if (IPC->streamFillNeeded[blockId]) { IPC->streamFillNeeded[blockId] = false; // DC_FlushAll(); /* if (!(REG_KEYINPUT & KEY_R)) { //consolePrintf("Align: %d First: %d Step:%d Res:%d\n", waveHeader.fmtBlockAlign, blockHeader.firstSample, blockHeader.stepTableIndex, blockHeader.reserved); consolePrintf("Filling buffer %d\n", blockId); }*/ for (int r = blockId * BUFFER_CHUNK_SIZE; r < (blockId + 1) * BUFFER_CHUNK_SIZE; r++) { if (isPlayingFlag) { audioBuffer[r] = decompressionBuffer[sampleNum++]; if (sampleNum >= waveHeader.fmtExtra) { decompressBlock(); sampleNum = 0; } } } lastBlockId = blockId; IPC->streamFillNeeded[blockId] = false; // DC_FlushAll(); } } if (lastBlockId != -1) { fillPos = lastBlockId; /* if (!(REG_KEYINPUT & KEY_R)) { consolePrintf("Frame fill done\n"); }*/ } IPC->adpcm.semaphore = false; // Release the buffer structure // DC_FlushAll(); } void stopTrack() { if (!isPlayingFlag) return; DS::std_fclose(file); isPlayingFlag = false; for (int r = 0; r < BUFFER_SIZE; r++) { audioBuffer[r] = 0; } for (int r= 0; r < waveHeader.fmtExtra; r++) { decompressionBuffer[r] = 0; } // DS::stopSound(1); // free(audioBuffer); // free(decompressionBuffer); DC_FlushAll(); } bool trackExists(int num) { Common::String path = ConfMan.get("path"); char fname[128]; sprintf(fname, "track%d.wav", num); if (path[strlen(path.c_str()) - 1] == '/') { path = path + fname; } else { path = path + "/" + fname; } consolePrintf("Looking for %s...", path.c_str()); FILE* file; if ((file = DS::std_fopen(path.c_str(), "r"))) { consolePrintf("Success!\n"); setActive(true); DS::std_fclose(file); return true; } sprintf(fname, "track%02d.wav", num); path = ConfMan.get("path"); if (path[strlen(path.c_str()) - 1] == '/') { path = path + fname; } else { path = path + "/" + fname; } consolePrintf("Looking for %s...", path.c_str()); if ((file = DS::std_fopen(path.c_str(), "r"))) { consolePrintf("Success!\n"); setActive(true); DS::std_fclose(file); return true; } else { setActive(false); consolePrintf("Failed!\n"); return false; } } bool checkCD() { // Need to check whethe CD audio files are present - do this by trying to open Track1.wav. consolePrintf("Attempted to open cd drive\n"); if (trackExists(1)) { trackStartsAt2 = false; return true; } else if (trackExists(2)) { trackStartsAt2 = true; return true; } else { return false; } } bool isPlaying() { return isPlayingFlag; } } }