mirror of
https://github.com/vgmstream/vgmstream.git
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999 lines
29 KiB
C
999 lines
29 KiB
C
#include "compresswave_decoder_lib.h"
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#include <math.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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/* Decodes CWav (CompressWave) audio codec, based on original delphi/pascal source code by Ko-Ta:
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* - http://kota.dokkoisho.com/
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* - http://kota.dokkoisho.com/library/CompressWave.zip
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* - https://web.archive.org/web/20180819144937/http://d.hatena.ne.jp/Ko-Ta/20070318/p1
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* (no license given)
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* Apparently found in few Japanese (doujin?) games around 1995-2002, most notably RADIO ZONDE.
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*
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* This is mostly a simple re-implementation following original code, basically Pascal-classes-to-plain-C
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* because why not. Only decoder part is replicated (some writting/loading/etc stuff removed or cleaned up).
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* Results should be byte-exact (all is int math).
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* **some parts like internal looping weren't tested (no valid files)
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*
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* Codec is basically huffman-coded ADPCM, that includes diff table and huffman tree setup in
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* CWav header. Described by the author as being "big, heavy and with bad sound quality".
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* An oddity is that mono files are output as fake stereo (repeats L/R), this is correct and agrees
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* with PCM totals in header. Output sample rate is always 44100 and files marked as 22050 or mono just
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* decode slightly differently. Curiously PCM output size in header may be not be multiple of 4, meaning
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* files that end with garbage half-a-sample (L sample = 0, nothing for R).
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*/
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/* ************************************************************************* */
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/* common */
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/* ************************************************************************* */
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// pascal reader simulated in C
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typedef struct {
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STREAMFILE* File;
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int64_t Position;
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int64_t Size;
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} TStream;
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static void TStream_Read_Uint32(TStream* this, uint32_t* value) {
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uint8_t buf[0x4] = {0};
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read_streamfile(buf, this->Position, sizeof(buf), this->File);
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this->Position += 0x4;
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*value = get_u32le(buf);
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}
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/* ************************************************************************* */
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/* HuffLib.pas */
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/* ************************************************************************* */
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#define CW_TRUE 1
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#define CW_FALSE 0
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typedef enum { nsEmpty, nsBranch, nsLeaf, nsRoot } TNodeState;
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//------------------------------------------------------------------------------
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//structure declaration
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//node structure for huffman tree
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typedef struct {
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uint8_t Value; //value (0..255)
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int32_t Weight; //weight value used during huffman tree creation
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TNodeState State; //state
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int32_t Link[2]; //bidimensional tree L/R path (-1: unused, >=0: index)
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} THuffTreeNode;
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//header info for file writting
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typedef struct {
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char HedChar[4]; //head info
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int32_t Version; //Version
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uint32_t HistGraph[256]; //appearance rate
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int64_t FileSize; //file size
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} THuffHedState;
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//for jumping to arbitrary places (^^), various usages
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typedef struct {
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uint32_t BitBuf;
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int32_t BitCount;
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int64_t StreamPos;
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uint32_t CipherBuf;
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} THuffPositionData;
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//------------------------------------------------------------------------------
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//huffman encoding class
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//handled values are 0~255 of 1 byte.
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//takes appearance rate and makes a huffman tree for encoding
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//EXTRA: external lib part, but not really needed so all is static
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typedef struct {
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//control
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TStream Buff; // target stream
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int64_t BeginPos; // encoded area
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int Mode; // (0=initial, 1=read, 2=write)
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//bit IO
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int IoCount; // 0..initial state, 1..read, 2..write
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uint32_t BitBuf; // held buffer
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int BitCount; // processed bit count
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#if 0
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int64_t BitWriteLen; // written size
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#endif
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uint32_t CipherBuf;
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//huffman
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THuffTreeNode Node[512]; //tree structure
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uint8_t Code[256][256]; //fork support
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int32_t Root; //root
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//huffman cipher bits
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uint32_t CipherList[16];
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//header info
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THuffHedState Hed;
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} THuff;
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//related to huffman encoding
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static void THuff_InitHuffTree(THuff* this); //initializes tree
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static int THuff_InsertHuffNode(THuff* this, int v, int w, TNodeState s, int b1, int b2); //add node to tree
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static void THuff_MakeHuffTree(THuff* this);
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//related to single bit IO
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static void THuff_BeginBitIO(THuff* this);
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static void THuff_EndBitIO(THuff* this);
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static int THuff_ReadBit(THuff* this);
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static uint32_t THuff__ROR(uint32_t src, uint32_t shift);
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static THuff* THuff_Create(TStream* buf); // creation
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static void THuff_Free(THuff* this); // release the power
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static void THuff_SetCipherCode(THuff* this, uint32_t msk); // encryption mask bits
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//functions for reading
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static void THuff_BeginRead(THuff* this);
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static int THuff_Read(THuff* this);
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#if 0
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static int64_t THuff_GetFileSize(THuff* this); // get file size before encoding
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static int THuff_GetEOF(THuff* this); // EOF detection
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#endif
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static void THuff_MoveBeginPosition(THuff* this); // return to initial state
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static void THuff_GetPositionData(THuff* this, THuffPositionData* s); // secret
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static void THuff_SetPositionData(THuff* this, THuffPositionData* s);
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//------------------------------------------------------------------------------
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//create
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static THuff* THuff_Create(TStream* buf) {
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THuff* this = malloc(sizeof(THuff));
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if (!this) return NULL;
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//define stream
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this->Buff = *buf;
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//initialization
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THuff_InitHuffTree(this);
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memcpy(this->Hed.HedChar, "HUF\0", 0x4);
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this->Hed.Version = 1;
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this->Hed.FileSize = 0;
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//set cipher bits
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this->CipherBuf = 0;
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THuff_SetCipherCode(this, 0x0);
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//mode
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this->Mode = 0;
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return this;
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}
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//------------------------------------------------------------------------------
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//free
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static void THuff_Free(THuff* this) {
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if (this == NULL) return;
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if (this->Mode == 2)
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THuff_EndBitIO(this);
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free(this);
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}
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//------------------------------------------------------------------------------
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//init tree structure (unused state)
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static void THuff_InitHuffTree(THuff* this) {
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int i;
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for (i = 0; i < 512; i++) {
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this->Node[i].State = nsEmpty;
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}
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}
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//------------------------------------------------------------------------------
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//add node to huffman tree
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static int THuff_InsertHuffNode(THuff* this, int v, int w, TNodeState s, int b1, int b2) {
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int result = 0;
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int i;
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i = 0;
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while ((this->Node[i].State != nsEmpty) && (i < 512)) {
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i++;
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}
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if (i == 512) {
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result = -1;
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return result; //exit;
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}
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this->Node[i].Value = v & 0xFF; //BYTE(v);
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this->Node[i].Weight = w;
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this->Node[i].State = s;
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this->Node[i].Link[0] = b1;
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if (this->Node[i].Link[0] > 511) {
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return -1;//? //halt;
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}
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this->Node[i].Link[1] = b2;
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if (this->Node[i].Link[1] > 511) {
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return -1;//? //halt;
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}
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//return entry number
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result = i;
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return result;
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}
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//------------------------------------------------------------------------------
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//reads and expands huffman-encoded data
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static int THuff_Read(THuff* this) {
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int i;
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i = this->Root;
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while (this->Node[i].State != nsLeaf) {
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i = this->Node[i].Link[THuff_ReadBit(this)];
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}
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return this->Node[i].Value;
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}
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//------------------------------------------------------------------------------
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//creates fork code from tree
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//finds node of lowest weight
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static int THuff_MakeHuffTree_SerchMinNode(THuff* this, int* tNode) {
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int ii, aaa1, aaa2;
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aaa1 = 0xFFFFFFF;
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aaa2 = 0;
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for (ii = 0 ; ii < 256; ii++) {
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if (tNode[ii] != -1) {
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if (this->Node[tNode[ii]].Weight < aaa1) {
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aaa2 = ii;
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aaa1 = this->Node[tNode[ii]].Weight;
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}
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}
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}
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return aaa2;
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}
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//finds closest node
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static int THuff_MakeHuffTree_SerchNearNode(THuff* this, int* tNode, int pos) {
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int ii, aaa1, aaa2;
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aaa1 = 0xFFFFFFF;
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aaa2 = 0;
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for (ii = 0 ; ii < 256; ii++) {
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if (tNode[ii] != -1) {
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if ((abs(this->Node[tNode[ii]].Weight - this->Node[tNode[pos]].Weight) < aaa1) && (pos != ii)) {
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aaa2 = ii;
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aaa1 = this->Node[tNode[ii]].Weight;
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}
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}
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}
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return aaa2;
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}
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static void THuff_MakeHuffTree_MakeHuffCodeFromTree(THuff* this, uint8_t* tCode1, int* tCodePos, int pos) {
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int ii, aaa1;
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if (this->Node[pos].State == nsLeaf) { //found
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tCode1[*tCodePos] = 0xFF;
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aaa1 = this->Node[pos].Value;
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for (ii = 0; ii < 256; ii++) {
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this->Code[aaa1][ii] = tCode1[ii];
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}
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}
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else { //not
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if (this->Node[pos].Link[0] != -1) {
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tCode1[*tCodePos] = 0;
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(*tCodePos)++;
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THuff_MakeHuffTree_MakeHuffCodeFromTree(this, tCode1, tCodePos, this->Node[pos].Link[0]);
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}
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if (this->Node[pos].Link[1] != -1) {
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tCode1[*tCodePos] = 1;
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(*tCodePos)++;
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THuff_MakeHuffTree_MakeHuffCodeFromTree(this, tCode1, tCodePos, this->Node[pos].Link[1]);
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}
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}
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(*tCodePos)--;
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}
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// creates huffman tree/codes from apparance rate (0..255)
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static void THuff_MakeHuffTree(THuff* this) {
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int i, aa1, aa2, aa3;
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int tCodePos;
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uint8_t tCode1[257];
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#if 0
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uint8_t tCode2[257];
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#endif
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int tNode[257];
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//initializes huffman tree
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THuff_InitHuffTree(this);
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for (i = 0; i < 256; i++) {
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tNode[i] = -1;
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tCode1[i] = 0;
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#if 0
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tCode2[i] = 0;
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#endif
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}
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//adds child nodes + comparison target nodes
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for (i = 0; i < 256; i++) {
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tNode[i] = THuff_InsertHuffNode(this, i, this->Hed.HistGraph[i], nsLeaf, -1, -1);
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}
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//creates optimal tree
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for (i = 0; i < 256 - 1; i++) {
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//find smallest node
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aa1 = THuff_MakeHuffTree_SerchMinNode(this, tNode);
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//find value closest to smallest node
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aa2 = THuff_MakeHuffTree_SerchNearNode(this, tNode, aa1);
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//make new node joining both together
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aa3 = THuff_InsertHuffNode(this, -1, this->Node[tNode[aa1]].Weight + this->Node[tNode[aa2]].Weight, nsBranch, tNode[aa1], tNode[aa2]);
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//remove aa1/2 from comparison target nodes.
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tNode[aa1] = -1;
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tNode[aa2] = -1;
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//add created node to comparison target nodes
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tNode[aa1] = aa3;
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}
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//finally make added node top of the tree
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this->Root = aa3;
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//create stack for data expansion from tree info
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tCodePos = 0;
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THuff_MakeHuffTree_MakeHuffCodeFromTree(this, tCode1, &tCodePos, this->Root);
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}
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//------------------------------------------------------------------------------
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//bit IO start process
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static void THuff_BeginBitIO(THuff* this) {
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this->IoCount = 0;
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this->BitBuf = 0;
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this->BitCount = 32;
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#if 0
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this->BitWriteLen = 0;
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#endif
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this->CipherBuf = 0;
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}
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//------------------------------------------------------------------------------
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//bit IO end process
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static void THuff_EndBitIO(THuff* this) {
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#if 0
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if (this->IoCount == 2 && this->BitCount > 0) {
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this->BitBuf = this->BitBuf ^ this->CipherBuf;
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TStream_Write(this->Buff, BitBuf,4);
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}
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#endif
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THuff_BeginBitIO(this);
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}
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//------------------------------------------------------------------------------
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//read 1 bit from file
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static int THuff_ReadBit(THuff* this) {
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int result;
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uint32_t aaa;
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if (this->BitCount == 32) {
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this->IoCount = 1; //ReadMode
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if (this->Buff.Position < this->Buff.Size) {
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//read
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TStream_Read_Uint32(&this->Buff, &aaa); //Buff.Read(aaa,sizeof(DWORD));
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this->BitBuf = aaa ^ this->CipherBuf;
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//decryption phase
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this->CipherBuf = THuff__ROR(this->CipherBuf, aaa & 7);
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this->CipherBuf = this->CipherBuf ^ this->CipherList[aaa & 7];
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}
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this->BitCount = 0;
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}
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//return 1 bit
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result = this->BitBuf & 1;
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this->BitBuf = this->BitBuf >> 1;
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//advance BitCount
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this->BitCount++;
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return result;
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}
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//------------------------------------------------------------------------------
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//starts reading encoded data from stream
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static void TStream_Read_THuffHedState(TStream* this, THuffHedState* Hed) {
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uint8_t buf[0x410];
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int i;
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read_streamfile(buf, this->Position, sizeof(buf), this->File);
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this->Position += sizeof(buf);
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/* 0x00: string size (always 3) */
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memcpy(Hed->HedChar, buf+0x01, 0x03);
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Hed->Version = get_u32le(buf+0x04);
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for (i = 0; i < 256; i++) {
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Hed->HistGraph[i] = get_u32le(buf+0x08 + i*0x04);
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}
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Hed->FileSize = get_u64le(buf+0x408); /* seems always 0 */
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}
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static void THuff_BeginRead(THuff* this) {
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TStream_Read_THuffHedState(&this->Buff, &this->Hed); //Buff.Read(Hed,sizeof(THuffHedState));
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THuff_MakeHuffTree(this);
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this->BeginPos = this->Buff.Position;
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THuff_BeginBitIO(this);
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this->Mode = 1;
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}
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#if 0
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//------------------------------------------------------------------------------
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//get file size before encoding
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static int64_t THuff_GetFileSize(THuff* this) {
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return this->Hed.FileSize;
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}
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//------------------------------------------------------------------------------
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//EOF detection
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static int THuff_GetEOF(THuff* this) {
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if (this->Buff.Position < this->Buff.Size)
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return CW_FALSE;
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else
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return CW_TRUE;
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}
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#endif
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//------------------------------------------------------------------------------
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//return to initial positon
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static void THuff_MoveBeginPosition(THuff* this) {
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THuff_EndBitIO(this);
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this->Buff.Position = this->BeginPos;
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THuff_BeginBitIO(this);
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}
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//------------------------------------------------------------------------------
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static void THuff_GetPositionData(THuff* this, THuffPositionData* s) {
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s->BitBuf = this->BitBuf;
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s->BitCount = this->BitCount;
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s->StreamPos = this->Buff.Position;
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s->CipherBuf = this->CipherBuf;
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}
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//------------------------------------------------------------------------------
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static void THuff_SetPositionData(THuff* this, THuffPositionData* s) {
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this->BitBuf = s->BitBuf;
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this->BitCount = s->BitCount;
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this->Buff.Position = s->StreamPos;
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this->CipherBuf = s->CipherBuf;
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}
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//------------------------------------------------------------------------------
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static void THuff_SetCipherCode(THuff* this, uint32_t msk) {
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//creates mask list
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this->CipherList[0] = msk / 3;
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this->CipherList[1] = msk / 17;
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this->CipherList[2] = msk / 7;
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this->CipherList[3] = msk / 5;
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this->CipherList[4] = msk / 3;
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this->CipherList[5] = msk / 11;
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this->CipherList[6] = msk / 13;
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this->CipherList[7] = msk / 19;
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}
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//------------------------------------------------------------------------------
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static uint32_t THuff__ROR(uint32_t src, uint32_t shift) {
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uint8_t num = shift % 0xFF;
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return ((uint32_t)src >> num) | ((uint32_t)src << (32 - num));
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}
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//-------------------------------------------------------------------
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// CompressWaveLib.pas
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//-------------------------------------------------------------------
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#define PW_MAXVOLUME 0xFFFFFFF //don't change
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//proprietary compression file header
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typedef struct {
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//RIFF chunk
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char HedChar[8]; // 'CmpWave'
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uint32_t Channel; // 2(STEREO) / 1(MONO)
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uint32_t Sample; // 44100Hz / 22050Hz
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uint32_t Bit; // 16bit
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int32_t Tbl[256]; // conversion table value
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int64_t UnPressSize; // decompressed data size
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int64_t LoopStart; // loop start/end position
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int64_t LoopEnd;
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uint8_t LoopCount; // loop times
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char MusicTitle[128*2]; // song name
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char MusicArtist[128*2]; // composer
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} PRESSWAVEDATAHED;
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//for writting
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typedef struct {
|
||
short RBuf;
|
||
short LBuf;
|
||
} TLRWRITEBUFFER;
|
||
|
||
|
||
//compression data class
|
||
struct TCompressWaveData {
|
||
//rendering flag (sets during rendering)
|
||
int NowRendering;
|
||
//flag for playback
|
||
int32_t Faa1;
|
||
int32_t Faa2;
|
||
int32_t Fvv1;
|
||
int32_t Fvv2;
|
||
|
||
int32_t FVolume;
|
||
int32_t Ffade;
|
||
int32_t FSetVolume;
|
||
|
||
int FEndLoop;
|
||
int32_t FLoop;
|
||
int FPlay;
|
||
int64_t FWavePosition;
|
||
int64_t FWaveLength;
|
||
//flag for 22050kHz
|
||
int32_t LBackBuf;
|
||
int32_t RBackBuf;
|
||
//for restoration
|
||
THuffPositionData PosData;
|
||
int32_t LPFaa1;
|
||
int32_t LPFaa2;
|
||
int32_t LPFvv1;
|
||
int32_t LPFvv2;
|
||
//cipher code
|
||
uint32_t CipherCode;
|
||
//hafu-hafu-hafuman
|
||
THuff* RH;
|
||
|
||
#if 0
|
||
TMemoryStream Data;
|
||
#endif
|
||
PRESSWAVEDATAHED Hed;
|
||
|
||
};
|
||
|
||
//-----------------------------------------------------------
|
||
//create
|
||
TCompressWaveData* TCompressWaveData_Create(void) {
|
||
TCompressWaveData* this = malloc(sizeof(TCompressWaveData));
|
||
if (!this) return NULL;
|
||
#if 0
|
||
this->Data = NULL;
|
||
#endif
|
||
this->RH = NULL;
|
||
this->FWavePosition = 0;
|
||
this->FWaveLength = 0;
|
||
this->FVolume = PW_MAXVOLUME;
|
||
this->FSetVolume = PW_MAXVOLUME;
|
||
this->Ffade = 0;
|
||
this->FEndLoop = CW_FALSE;
|
||
this->FPlay = CW_FALSE;
|
||
this->NowRendering = CW_FALSE;
|
||
TCompressWaveData_SetCipherCode(this, 0);
|
||
|
||
return this;
|
||
}
|
||
|
||
//-----------------------------------------------------------
|
||
//free
|
||
void TCompressWaveData_Free(TCompressWaveData* this) {
|
||
if (!this)
|
||
return;
|
||
|
||
//EXTRA: presumably for threading but OG lib doesn't properly set this to false on all errors
|
||
#if 0
|
||
//sync
|
||
while (this->NowRendering) {
|
||
;
|
||
}
|
||
#endif
|
||
//free
|
||
if (this->RH != NULL)
|
||
THuff_Free(this->RH);
|
||
#if 0
|
||
if (this->Data != NULL)
|
||
TMemoryStream_Free(this->Data);
|
||
#endif
|
||
free(this);
|
||
}
|
||
|
||
|
||
//-----------------------------------------------------------
|
||
//outpus 44100/16bit/stereo waveform to designed buffer
|
||
|
||
static void TCompressWaveData_Rendering_ReadPress(TCompressWaveData* this, int32_t* RFlg, int32_t* LFlg) {
|
||
if (this->Hed.Channel == 2) {
|
||
*RFlg = THuff_Read(this->RH); //STEREO
|
||
*LFlg = THuff_Read(this->RH);
|
||
}
|
||
else {
|
||
*RFlg = THuff_Read(this->RH); //MONO
|
||
*LFlg = *RFlg;
|
||
}
|
||
}
|
||
|
||
static void TCompressWaveData_Rendering_WriteWave(TCompressWaveData* this, int16_t** buf1, int32_t RVol, int32_t LVol) {
|
||
TLRWRITEBUFFER bbb = {0};
|
||
|
||
if (this->Hed.Sample == 44100) { //44100 STEREO/MONO
|
||
bbb.RBuf = RVol;
|
||
bbb.LBuf = LVol;
|
||
(*buf1)[0] = bbb.RBuf;
|
||
(*buf1)[1] = bbb.LBuf;
|
||
(*buf1) += 2;
|
||
}
|
||
if (this->Hed.Sample == 22050) { //22050 STEREO/MONO
|
||
bbb.RBuf = (this->RBackBuf + RVol) / 2;
|
||
bbb.LBuf = (this->LBackBuf + LVol) / 2;
|
||
(*buf1)[0] = bbb.RBuf;
|
||
(*buf1)[1] = bbb.LBuf;
|
||
(*buf1) += 2;
|
||
|
||
bbb.RBuf = RVol;
|
||
bbb.LBuf = LVol;
|
||
(*buf1)[0] = bbb.RBuf;
|
||
(*buf1)[1] = bbb.LBuf;
|
||
(*buf1) += 2;
|
||
|
||
this->RBackBuf = RVol;
|
||
this->LBackBuf = LVol;
|
||
}
|
||
}
|
||
|
||
int TCompressWaveData_Rendering(TCompressWaveData* this, int16_t* buf, uint32_t Len) {
|
||
int result;
|
||
int32_t RFlg, LFlg, RVol, LVol;
|
||
int i, aaa;
|
||
int16_t* buf1;
|
||
int32_t PressLength, WaveStep;
|
||
|
||
|
||
this->NowRendering = CW_TRUE;
|
||
result = CW_FALSE;
|
||
#if 0
|
||
if (this->Data == NULL) {
|
||
this->NowRendering = CW_FALSE;
|
||
return result; //exit;
|
||
}
|
||
#endif
|
||
|
||
//fadeout song stop
|
||
if ((this->FVolume < 1) && (this->FSetVolume < 1)) {
|
||
this->FPlay = CW_FALSE;
|
||
}
|
||
//if (abs(this->FSetVolume - this->FVolume) < this->Ffade) {
|
||
// this->FPlay = CW_FALSE;
|
||
//}
|
||
|
||
//stop if FPlay (play flag) wasn't set
|
||
if (this->FPlay == CW_FALSE) {
|
||
this->NowRendering = CW_FALSE;
|
||
return result; //exit;
|
||
}
|
||
|
||
//pre processing
|
||
RVol = this->Fvv1;
|
||
LVol = this->Fvv2;
|
||
if (this->Hed.Sample == 44100)
|
||
WaveStep = 4;
|
||
else
|
||
WaveStep = 8;
|
||
|
||
PressLength = (int32_t)Len / WaveStep;
|
||
|
||
//expansion processing
|
||
buf1 = buf;
|
||
for (i = 0; i < PressLength; i++) {
|
||
|
||
//crossed over？
|
||
if (this->FWavePosition > this->FWaveLength) {
|
||
if (this->FEndLoop == CW_TRUE) { //playback with loop?
|
||
TCompressWaveData_Previous(this);
|
||
}
|
||
else { //in case of playback without loop
|
||
this->FPlay = CW_FALSE;
|
||
return result; //exit
|
||
}
|
||
}
|
||
|
||
//loop related
|
||
if (this->Hed.LoopCount > this->FLoop) {
|
||
//if position is loop start, hold current flag/state
|
||
//shr 3 matches 8 bit aligment
|
||
if ((this->Hed.LoopStart >> 3) == (this->FWavePosition >> 3)) {
|
||
TCompressWaveData_GetLoopState(this);
|
||
}
|
||
//if reached loop end do loop.
|
||
if ((this->Hed.LoopEnd >> 3) == (this->FWavePosition >> 3)) {
|
||
if (this->Hed.LoopCount != 255)
|
||
this->FLoop++;
|
||
TCompressWaveData_SetLoopState(this);
|
||
}
|
||
}
|
||
|
||
//read
|
||
TCompressWaveData_Rendering_ReadPress(this, &RFlg, &LFlg);
|
||
this->Faa1 = this->Faa1 + this->Hed.Tbl[RFlg];
|
||
this->Faa2 = this->Faa2 + this->Hed.Tbl[LFlg];
|
||
this->Fvv1 = this->Fvv1 + this->Faa1;
|
||
this->Fvv2 = this->Fvv2 + this->Faa2;
|
||
|
||
//volume adjustment
|
||
aaa = this->FSetVolume - this->FVolume;
|
||
if (abs(aaa) < this->Ffade) {
|
||
this->FVolume = this->FSetVolume;
|
||
}
|
||
else {
|
||
if (aaa > 0)
|
||
this->FVolume = this->FVolume + this->Ffade;
|
||
else
|
||
this->FVolume = this->FVolume - this->Ffade;
|
||
}
|
||
|
||
//threshold calcs (due to overflow)
|
||
if (this->Fvv1 > +32760) {
|
||
this->Fvv1 = +32760;
|
||
this->Faa1 = 0;
|
||
}
|
||
if (this->Fvv1 < -32760) {
|
||
this->Fvv1 = -32760;
|
||
this->Faa1 = 0;
|
||
}
|
||
if (this->Fvv2 > +32760) {
|
||
this->Fvv2 = +32760;
|
||
this->Faa2 = 0;
|
||
}
|
||
if (this->Fvv2 < -32760) {
|
||
this->Fvv2 = -32760;
|
||
this->Faa2 = 0;
|
||
}
|
||
|
||
aaa = (this->FVolume >> 20);
|
||
RVol = this->Fvv1 * aaa / 256;
|
||
LVol = this->Fvv2 * aaa / 256;
|
||
|
||
//expand to buffer
|
||
TCompressWaveData_Rendering_WriteWave(this, &buf1, RVol, LVol);
|
||
//advance playback position
|
||
this->FWavePosition += WaveStep;
|
||
}
|
||
|
||
//remainder calcs
|
||
//depending on buffer lenght remainder may happen
|
||
//example: 44100 / 4 = 11025...OK 44100 / 8 = 5512.5...NG
|
||
// in that case appear as noise
|
||
if (Len % 8 == 4) {
|
||
TCompressWaveData_Rendering_WriteWave(this, &buf1, RVol, LVol);
|
||
}
|
||
|
||
this->NowRendering = CW_FALSE;
|
||
result = CW_TRUE;
|
||
return result;
|
||
}
|
||
|
||
|
||
//-----------------------------------------------------------
|
||
//read compressed file from stream
|
||
|
||
static void TStream_Read_PRESSWAVEDATAHED(TStream* this, PRESSWAVEDATAHED* Hed) {
|
||
uint8_t buf[0x538];
|
||
int i, len;
|
||
|
||
read_streamfile(buf, this->Position, sizeof(buf), this->File);
|
||
this->Position += sizeof(buf);
|
||
|
||
memcpy(Hed->HedChar, buf + 0x00, 8);
|
||
Hed->Channel = get_u32le(buf + 0x08);
|
||
Hed->Sample = get_u32le(buf + 0x0c);
|
||
Hed->Bit = get_u32le(buf + 0x10);
|
||
for (i = 0; i < 256; i++) {
|
||
Hed->Tbl[i] = get_s32le(buf + 0x14 + i * 0x04);
|
||
}
|
||
Hed->UnPressSize = get_u64le(buf + 0x418);
|
||
Hed->LoopStart = get_u64le(buf + 0x420);
|
||
Hed->LoopEnd = get_u64le(buf + 0x428);
|
||
Hed->LoopCount = get_u8 (buf + 0x430);
|
||
|
||
len = get_u8 (buf + 0x431);
|
||
memcpy(Hed->MusicTitle, buf + 0x432, len);
|
||
len = get_u8 (buf + 0x4B1);
|
||
memcpy(Hed->MusicArtist, buf + 0x4B2, len);
|
||
|
||
/* 0x538: huffman table */
|
||
/* 0x948: data start */
|
||
}
|
||
|
||
int TCompressWaveData_LoadFromStream(TCompressWaveData* this, STREAMFILE* ss) {
|
||
int result = CW_FALSE;
|
||
TStream data = {0};
|
||
|
||
if (ss == NULL)
|
||
return result;
|
||
#if 0
|
||
if (this->Data != NULL)
|
||
TMemoryStream_Free(this->Data);
|
||
#endif
|
||
|
||
data.File = ss; //data = TMemoryStream.Create;
|
||
data.Size = get_streamfile_size(ss); //data.SetSize(ss.Size);
|
||
//data.CopyFrom(ss,0);
|
||
|
||
//get header info
|
||
data.Position = 0;
|
||
|
||
TStream_Read_PRESSWAVEDATAHED(&data, &this->Hed); //data.Read(Hed,sizeof(PRESSWAVEDATAHED));
|
||
this->FWaveLength = this->Hed.UnPressSize;
|
||
if (this->RH != NULL)
|
||
THuff_Free(this->RH);
|
||
this->RH = THuff_Create(&data);
|
||
if (!this->RH) return result;
|
||
|
||
THuff_SetCipherCode(this->RH, 0x00);
|
||
THuff_BeginRead(this->RH);
|
||
|
||
//initialize playback flag
|
||
TCompressWaveData_Stop(this);
|
||
TCompressWaveData_SetVolume(this, 1.0, 0.0);
|
||
result = CW_TRUE;
|
||
return result;
|
||
}
|
||
|
||
//------------------------------------------------------------------------------
|
||
//temp pause
|
||
void TCompressWaveData_Pause(TCompressWaveData* this) {
|
||
this->FPlay = CW_FALSE;
|
||
}
|
||
|
||
//-----------------------------------------------------------
|
||
//sets volume
|
||
void TCompressWaveData_SetVolume(TCompressWaveData* this, float vol, float fade) {
|
||
float aaa;
|
||
|
||
//EXTRA: C float seemingly can't store PW_MAXVOLUME (268435455 becomes 268435456.0), so must cast to double
|
||
// to get proper results. Otherwise volume gets slightly different vs original (no casting needed there).
|
||
// vol=1.0, fade=0.0 is the same as default params.
|
||
|
||
aaa = vol;
|
||
//set volume threshold
|
||
if (aaa > 1.0) aaa = 1.0;
|
||
if (aaa < 0.0) aaa = 0.0;
|
||
//calc volume increse
|
||
if (fade < 0.01) { //with fade value
|
||
this->Ffade = 0;
|
||
this->FVolume = round(aaa * (double)PW_MAXVOLUME);
|
||
this->FSetVolume = this->FVolume;
|
||
}
|
||
else { //without fade value
|
||
this->Ffade = round((double)PW_MAXVOLUME / fade / 44100);
|
||
this->FSetVolume = round(aaa * (double)PW_MAXVOLUME);
|
||
}
|
||
}
|
||
|
||
//-----------------------------------------------------------
|
||
//returns fade value
|
||
float TCompressWaveData_GetFade(TCompressWaveData* this) {
|
||
if ((this->Ffade == 0) || (abs(this->FVolume - this->FSetVolume) == 0)) {
|
||
return 0; //exit;
|
||
}
|
||
return (abs(this->FVolume - this->FSetVolume)/44100) / this->Ffade;
|
||
}
|
||
|
||
//-----------------------------------------------------------
|
||
//returns volume value
|
||
float TCompressWaveData_GetVolume(TCompressWaveData* this) {
|
||
return this->FVolume / PW_MAXVOLUME;
|
||
}
|
||
|
||
//------------------------------------------------------------------------------
|
||
//returns volume after fade
|
||
float TCompressWaveData_GetSetVolume(TCompressWaveData* this) {
|
||
return this->FSetVolume / PW_MAXVOLUME;
|
||
}
|
||
|
||
//------------------------------------------------------------------------------
|
||
//returns play time (current position). unit is secs
|
||
float TCompressWaveData_GetPlayTime(TCompressWaveData* this) {
|
||
return this->FWavePosition / (44100*4);
|
||
}
|
||
|
||
//-----------------------------------------------------------
|
||
//returns song length. unit is secs
|
||
float TCompressWaveData_GetTotalTime(TCompressWaveData* this) {
|
||
return this->FWaveLength / (44100*4);
|
||
}
|
||
|
||
//-----------------------------------------------------------
|
||
//play stop command. returns song to beginning
|
||
void TCompressWaveData_Stop(TCompressWaveData* this) {
|
||
//play flags to initial state
|
||
this->FWavePosition = 0;
|
||
this->Fvv1 = 0;
|
||
this->Faa1 = 0;
|
||
this->Fvv2 = 0;
|
||
this->Faa2 = 0;
|
||
this->LBackBuf = 0;
|
||
this->RBackBuf = 0;
|
||
TCompressWaveData_SetVolume(this, 1.0, 0);
|
||
this->FPlay = CW_FALSE;
|
||
this->FLoop = 0;
|
||
#if 0
|
||
if (this->Data == NULL)
|
||
return;
|
||
#endif
|
||
|
||
//EXTRA: presumably for threading but OG lib doesn't properly set this to false on all errors
|
||
#if 0
|
||
//sync
|
||
while (this->NowRendering) {
|
||
;
|
||
}
|
||
#endif
|
||
|
||
//return to initial location
|
||
THuff_MoveBeginPosition(this->RH);
|
||
}
|
||
|
||
//-----------------------------------------------------------
|
||
//returns song to beginning. difference vs STOP is that fade isn't initialized
|
||
void TCompressWaveData_Previous(TCompressWaveData* this) {
|
||
//play flags to initial state
|
||
this->FWavePosition = 0;
|
||
this->Fvv1 = 0;
|
||
this->Faa1 = 0;
|
||
this->Fvv2 = 0;
|
||
this->Faa2 = 0;
|
||
this->LBackBuf = 0;
|
||
this->RBackBuf = 0;
|
||
this->FLoop = 0;
|
||
|
||
#if 0
|
||
if (this->Data == NULL)
|
||
return;
|
||
#endif
|
||
//return to initial location
|
||
THuff_MoveBeginPosition(this->RH);
|
||
}
|
||
|
||
//------------------------------------------------------------
|
||
//starts song playback
|
||
void TCompressWaveData_Play(TCompressWaveData* this, int loop) {
|
||
this->FPlay = CW_TRUE;
|
||
this->FEndLoop = loop;
|
||
if ((this->FVolume == 0) && (this->FSetVolume == 0))
|
||
TCompressWaveData_SetVolume(this, 1.0,0);
|
||
}
|
||
|
||
//------------------------------------------------------------
|
||
//set parameters for looping
|
||
//--------------------------------------------------------------
|
||
//record encoded file position
|
||
//since it uses huffman needs to held those flags too
|
||
void TCompressWaveData_GetLoopState(TCompressWaveData* this) {
|
||
this->LPFaa1 = this->Faa1;
|
||
this->LPFaa2 = this->Faa2;
|
||
this->LPFvv1 = this->Fvv1;
|
||
this->LPFvv2 = this->Fvv2;
|
||
THuff_GetPositionData(this->RH, &this->PosData);
|
||
}
|
||
|
||
//--------------------------------------------------------------
|
||
//return to recorded encoded file position
|
||
void TCompressWaveData_SetLoopState(TCompressWaveData* this) {
|
||
this->Faa1 = this->LPFaa1;
|
||
this->Faa2 = this->LPFaa2;
|
||
this->Fvv1 = this->LPFvv1;
|
||
this->Fvv2 = this->LPFvv2;
|
||
THuff_SetPositionData(this->RH, &this->PosData);
|
||
this->FWavePosition = this->Hed.LoopStart;
|
||
}
|
||
|
||
//-----------------------------------------------------------
|
||
//sets cipher code
|
||
void TCompressWaveData_SetCipherCode(TCompressWaveData* this, uint32_t Num) {
|
||
this->CipherCode = Num;
|
||
}
|
||
|