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| unit UcSoundPlayer;
interface
uses
Classes,Windows,MMSystem,Messages,
UeSoundState;
type cSoundPlayer=class
private
mBuffers:array[0..7] of TWAVEHDR;
mBufferSize: integer;
mDataEnd: integer;
mDataStart: integer;
mDevice: HWAVEOUT;
mPlayingBufferCount: integer;
mRepeat: boolean;
procedure LoadBuffer(Index: integer);
function LoadMpeg1File(): PWaveFormatEx;
function LoadWaveFile(): PWaveFormatEx;
protected
mBeepAtLeast: boolean;
mDesiredLoops: integer;
mLoopsToPlay: integer;
mOnFinishedPlayback: TNotifyEvent;
mSource: TStream;
mState: eSoundState;
mWnd: HWND;
procedure MsgHandler(var Msg: TMessage);
public
constructor Create; virtual;
destructor Destroy; override;
function Pause(): boolean; virtual;
function Play(): boolean; virtual;
function Reset(): boolean; virtual;
function Stop(): boolean; virtual;
property State: eSoundState read mState;
published
property BeepAtLeast: boolean read mBeepAtLeast write mBeepAtLeast;
property Loop: boolean read mRepeat write mRepeat;
property Loops: integer read mDesiredLoops write mDesiredLoops;
property OnFinishedPlayback: TNotifyEvent read mOnFinishedPlayback write mOnFinishedPlayback;
property Stream: TStream read mSource write mSource;
end;
implementation
uses
SysUtils,Forms;
const WAVEHDRSIZE=sizeof(TWAVEHDR);
const WAVE_FORMAT_MPEG=$50;
const WAVE_FORMAT_MPEGLAYER3=$55;
const ACM_MPEG_LAYER1=1;
const ACM_MPEG_LAYER2=2;
const ACM_MPEG_LAYER3=4;
const ACM_MPEG_STEREO=1;
const ACM_MPEG_JOINTSTEREO=2;
const ACM_MPEG_DUALCHANNEL=4;
const ACM_MPEG_SINGLECHANNEL=8;
const ACM_MPEG_ID_MPEG1=$10;
const MPEGLAYER3_ID_MPEG=1;
const MPEGLAYER3_FLAG_PADDING_ON=1;
const MPEGLAYER3_FLAG_PADDING_OFF=2;
const BUFFERSIZE=4096;
const SAMPLINGFREQ: array[0..3] of integer=(44100,48000,32000,0);
const ACM_CHANNELS: array[0..3] of integer=(ACM_MPEG_STEREO,ACM_MPEG_JOINTSTEREO,ACM_MPEG_DUALCHANNEL,ACM_MPEG_SINGLECHANNEL);
const ACM_LAYERS: array[1..3] of integer=(ACM_MPEG_LAYER1,ACM_MPEG_LAYER2,ACM_MPEG_LAYER3);
const BITRATES: array[0..2, 0..15] of integer=
(
(0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,0),
(0,32,48,56,64,80,96,112,128,160,192,224,256,320,384,0),
(0,32,40,48,56,64,80,96,112,128,160,192,224,256,320,0)
);
type TWAVHeader=packed record
RIFFHeader: packed array [0..3] of Char;
FileSize: Longint;
WAVEHeader: packed array [0..3] of Char;
FormatHeader: packed array [0..3] of Char;
FormatSize: Longint;
FormatEx:TWaveFormatEx;
end;
type TChunk=packed record
Signature: LongWord;
Length: longint;
end;
type TMPEG1WAVEFORMAT=packed record
wfx: TWaveFormatEx;
fwHeadLayer: word;
dwHeadBitrate: DWORD;
fwHeadMode: WORD;
fwHeadModeExt: WORD;
wHeadEmphasis: WORD;
fwHeadFlags: WORD;
dwPTSLow: DWORD;
dwPTSHigh: DWORD;
end;
type PMPEG1WAVEFORMAT=^TMPEG1WAVEFORMAT;
type TMPEGLAYER3WAVEFORMAT=packed record
wfx: tWAVEFORMATEX;
wID: WORD;
fdwFlags: DWORD;
nBlockSize: WORD;
nFramesPerBlock: WORD;
nCodecDelay: WORD;
end;
type PMPEGLAYER3WAVEFORMAT=^TMPEGLAYER3WAVEFORMAT;
type EWPlayer=Exception;
{$WARN SYMBOL_DEPRECATED OFF}
constructor cSoundPlayer.Create();
begin
mState:=SS_STOPPED;
mRepeat:=false;
mBeepAtLeast:=false;
mWnd:=AllocateHWnd(MsgHandler);
end;
destructor cSoundPlayer.Destroy();
begin
try
Stop();
finally
DeallocateHWnd(mWnd);
end;
inherited;
end;
{$WARN SYMBOL_DEPRECATED ON}
procedure cSoundPlayer.LoadBuffer(Index:integer);
var
lLoadableBufferSize: integer;
begin
with mBuffers[Index],mSource do
begin
dwFlags:=0;
lLoadableBufferSize:=mDataEnd-Position-mBufferSize;
if lLoadableBufferSize>=0 then
lLoadableBufferSize:=mBufferSize
else
inc(lLoadableBufferSize,mBufferSize);
dwBufferLength:=Read(lpData^,lLoadableBufferSize);
if dwBufferLength=0 then exit;
if waveOutPrepareHeader(mDevice,@mBuffers[Index],WAVEHDRSIZE)=MMSYSERR_NOERROR then
inc(mPlayingBufferCount);
end;
end;
function cSoundPlayer.LoadMpeg1File: PWaveFormatEx;
var
lIndex: integer;
lIndex2: integer;
lBuffer: PByteArray;
lFrame: DWORD;
lIsLayer3: boolean;
begin
Result:=nil;
lFrame:=0;
lBuffer:=nil;
try
mSource.Position:=0;
try
GetMem(lBuffer,BUFFERSIZE);
repeat
mDataStart:=mSource.Position;
lIndex2:=mSource.Read(lBuffer^,BUFFERSIZE);
for lIndex:=0 to lIndex2-5 do
if(lBuffer^[lIndex]=$FF)and(lBuffer^[lIndex+1]and $F0=$F0)and(lBuffer^[lIndex+1]and 6<>0)then
begin
lFrame:=PDWORD(longint(lBuffer)+lIndex)^;
mDataStart:=mDataStart+lIndex;
lIndex2:=0;
break;
end;
if lIndex2<>0 then mSource.Seek(-3,soFromCurrent);
until lIndex2=0;
finally
if lBuffer<>nil then FreeMem(lBuffer);
end;
if lFrame=0 then Abort;
lIsLayer3:=(lFrame shr 13)and 3=3;
if lIsLayer3 then
GetMem(Result,sizeof(TMPEGLAYER3WAVEFORMAT))
else
GetMem(Result,sizeof(TMPEG1WAVEFORMAT));
with Result^ do
begin
if lIsLayer3 then wFormatTag:=WAVE_FORMAT_MPEGLAYER3 else wFormatTag:=WAVE_FORMAT_MPEG;
if(lFrame shr 30)and 3=3 then nChannels:=1 else nChannels:=2;
nSamplesPerSec:=SamplingFreq[(lFrame shr 18) and 3];
nAvgBytesPerSec:=BITRATES[((lFrame shr 13) and 3)-1,(lFrame shr 20) and $f]*1000 shr 3;
nBlockAlign:=1;
wBitsPerSample:=0;
if lIsLayer3 then cbSize:=sizeof(TMPEGLAYER3WAVEFORMAT)-sizeof(TWAVEFORMATEX) else cbSize:=sizeof(TMPEG1WAVEFORMAT)-sizeof(TWAVEFORMATEX);
end;
if lIsLayer3 then
with PMPEGLAYER3WAVEFORMAT(result)^ do
begin
wID:=MPEGLAYER3_ID_MPEG;
if lFrame and $20000<>0 then fdwFlags:=MPEGLAYER3_FLAG_PADDING_ON else fdwFlags:=MPEGLAYER3_FLAG_PADDING_OFF;
with wfx do
if nSamplesPerSec>=32000 then nBlockSize:=1152*nAvgBytesPerSec div nSamplesPerSec else nBlockSize:=576*nAvgBytesPerSec div nSamplesPerSec;
nFramesPerBlock:=1;
nCodecDelay:=$0571;
end
else
with PMPEG1WAVEFORMAT(Result)^ do
begin
fwHeadLayer:=ACM_Layers[(lFrame shr 13) and 3];
dwHeadBitrate:=bitrates[((lFrame shr 13) and 3)-1,(lFrame shr 20) and $f];
fwHeadMode:=ACM_Channels[(lFrame shr 30) and 3];
fwHeadModeExt:=0;
wHeadEmphasis:=((lFrame shr 24) and 3)+1;
dwPTSLow:=0;
dwPTSHigh:=0;
fwHeadFlags:=ACM_MPEG_ID_MPEG1;
end;
mDataEnd:=mSource.Size;
except
if Result<>nil then FreeAndNil(Result);
end;
end;
function cSoundPlayer.LoadWaveFile: PWaveFormatEx;
var
lWaveHdr: TWAVHeader;
lChunk: TChunk;
begin
Result:=nil;
try
mSource.Position:=0;
mSource.ReadBuffer(lWaveHdr,sizeof(TWAVHeader));
if lWaveHdr.WAVEHeader<>'WAVE' then Abort;
with lWaveHdr.FormatEx do
if wFormatTag=WAVE_FORMAT_PCM then
begin
cbSize:=0;
mSource.Position:=lWaveHdr.FormatSize+20;
end;
GetMem(Result,lWaveHdr.FormatEx.cbSize+sizeof(TWaveFormatEx));
Result^:=lWaveHdr.FormatEx;
mSource.ReadBuffer(pointer(cardinal(Result)+sizeof(TWaveFormatEx))^,Result^.cbSize);
mSource.ReadBuffer(lChunk,sizeof(lChunk));
while lChunk.Signature<>$61746164 do
begin
mSource.position:=mSource.position+lChunk.Length;
mSource.ReadBuffer(lChunk,sizeof(lChunk));
end;
mDataStart:=mSource.position;
mDataEnd:=mDataStart+lChunk.Length;
except
if Result<>nil then FreeAndNil(Result);
end;
end;
procedure cSoundPlayer.MsgHandler(var Msg: TMessage);
var
lIndex: integer;
begin
with Msg do
case Msg of
MM_WOM_DONE:
begin
waveOutUnprepareHeader(wParam,PWAVEHDR(lParam),WAVEHDRSIZE);
dec(mPlayingBufferCount);
if mState=SS_STOPPED then exit;
LoadBuffer(PWAVEHDR(lParam)^.dwUser);
if PWAVEHDR(lParam)^.dwBufferLength=0 then
begin
if mRepeat or (mLoopsToPlay>0) then
begin
mSource.Position:=mDataStart;
LoadBuffer(PWAVEHDR(lParam)^.dwUser);
waveOutWrite(wParam,PWAVEHDR(lParam),WAVEHDRSIZE);
dec(mLoopsToPlay);
if mLoopsToPlay<0 then mLoopsToPlay:=0;
end else
if mPlayingBufferCount<1 then
begin
mState:=SS_STOPPED;
waveOutReset(wParam);
waveOutClose(wParam);
for lIndex:=0 to 7 do FreeMem(mBuffers[lIndex].lpData);
if Assigned(mOnFinishedPlayback) then mOnFinishedPlayback(Self);
end;
end else
waveOutWrite(wParam,PWAVEHDR(lParam),WAVEHDRSIZE);
end;
else
Result:=DefWindowProc(mWnd,Msg,wParam,lParam);
end;
end;
function cSoundPlayer.Pause(): boolean;
begin
try
case mState of
SS_STOPPED: Abort;
SS_PLAYING:
begin
mState:=SS_PAUSED;
if waveOutPause(mDevice)<>MMSYSERR_NOERROR then Abort;
end;
SS_PAUSED:
begin
mState:=SS_PLAYING;
if waveOutRestart(mDevice)<>MMSYSERR_NOERROR then Abort;
end;
end;
result:=true;
except
result:=false;
end;
end;
function cSoundPlayer.Play(): boolean;
var
lWaveInfo: PWaveFormatEx;
lIndex: integer;
lResult: MMRESULT;
begin
if mState=SS_PLAYING then begin Result:=false; exit; end;
if mState=SS_PAUSED then begin Result:=Pause(); exit; end;
lWaveInfo:=nil;
try
lWaveInfo:=LoadWaveFile();
if lWaveInfo=nil then lWaveInfo:=LoadMpeg1File();
if lWaveInfo=nil then Abort;
mLoopsToPlay:=mDesiredLoops-1;
mPlayingBufferCount:=0;
with lWaveInfo^ do mBufferSize:=nBlockAlign*nSamplesPerSec shr 6;
for lIndex:=0 to 7 do
begin
GetMem(mBuffers[lIndex].lpData,mBufferSize);
mBuffers[lIndex].dwLoops:=1;
mBuffers[lIndex].dwUser:=lIndex;
end;
lResult:=waveOutOpen(@mDevice,WAVE_MAPPER,lWaveInfo,mWnd,cardinal(self),CALLBACK_WINDOW or WAVE_ALLOWSYNC);
if lResult<>MMSYSERR_NOERROR then raise EWPlayer.Create('MM System Error: '+IntToStr(lResult));
FreeMem(lWaveInfo);
mSource.Position:=mDataStart;
for lIndex:=0 to 7 do LoadBuffer(lIndex);
mState:=SS_PLAYING;
for lIndex:=0 to 7 do
if mBuffers[lIndex].dwBufferLength<>0 then waveOutWrite(mDevice,@mBuffers[lIndex],WAVEHDRSIZE);
Result:=true;
except
mState:=SS_STOPPED;
FreeMem(lWaveInfo);
for lIndex:=0 to 7 do FreeMem(mBuffers[lIndex].lpData);
Result:=false;
if mBeepAtLeast then Windows.MessageBeep(MB_ICONQUESTION);
mState:=SS_STOPPED;
end;
end;
function cSoundPlayer.Reset() :boolean;
begin
try
mState:=SS_STOPPED;
if waveOutReset(mDevice)<>MMSYSERR_NOERROR then Abort;
Result:=true;
except
Result:=false;
end;
end;
function cSoundPlayer.Stop(): boolean;
var
lIndex: integer;
begin
Result:=false;
if mState=SS_STOPPED then exit;
try
mState:=SS_STOPPED;
if waveOutClose(mDevice)<>MMSYSERR_NOERROR then
begin
for lIndex:=0 to 7 do mBuffers[lIndex].dwBufferLength:=0;
lIndex:=16;
while (mPlayingBufferCount>0) and (lIndex>0) do
begin
Sleep(100);
dec(lIndex);
end;
if waveOutClose(mDevice)<>MMSYSERR_NOERROR then Abort;
for lIndex:=0 to 7 do FreeMem(mBuffers[lIndex].lpData);
end;
Result:=true;
except
end;
end;
end. |
MP3 KOMPONENTE das hatten wir doch schon oft, oder nicht?