有没有简单的功能?我正在寻找类似的东西
播放(@data,44000,100 {时间});
答案 0 :(得分:7)
我在PCM音频操作方面做了很多工作。在播放自定义波形音频数据的短序列时,我总是使用此功能:
var
PlaySoundStopper: PBoolean;
SoundPlayerActive: boolean = false;
procedure PlaySound(const Sound: TASSound);
var
hWave: HWAVEOUT;
hdr: TWaveHdr;
buf: PAnsiChar;
fmt: TWaveFormatEx;
i: Integer;
n: Integer;
begin
try
with fmt do
begin
wFormatTag := WAVE_FORMAT_PCM;
nChannels := length(Sound.Channels);
nSamplesPerSec := Sound.SampleRate;
wBitsPerSample := 32;
nAvgBytesPerSec := nChannels * nSamplesPerSec * wBitsPerSample div 8;
nBlockAlign := nChannels * wBitsPerSample div 8;
cbSize := 0;
end;
GetMem(buf, fmt.nChannels * length(Sound.Channels[0]) * sizeof(TASWaveformSample));
if length(Sound.Channels) = 1 then
CopyMemory(buf, @(Sound.Channels[0, 0]), length(Sound.Channels[0]) * sizeof(TASWaveformSample))
else
for i := 0 to high(Sound.Channels[0]) do
for n := 0 to high(Sound.Channels) do
CopyMemory(buf + sizeof(TASWaveformSample) * (i * fmt.nChannels + n), @(Sound.Channels[n, i]), sizeof(TASWaveformSample));
if waveOutOpen(@hWave, WAVE_MAPPER, @fmt, 0, 0, CALLBACK_NULL) <> MMSYSERR_NOERROR then
raise Exception.Create('SoundPlayerThread.Execute: waveOutOpen failed: ' + SysErrorMessage(GetLastError));
ZeroMemory(@hdr, sizeof(hdr));
with hdr do
begin
lpData := buf;
dwBufferLength := fmt.nChannels * length(Sound.Channels[0]) * sizeof(TASWaveformSample);
dwFlags := 0;
end;
try
SoundPlayerActive := true;
waveOutPrepareHeader(hWave, @hdr, sizeof(hdr));
waveOutWrite(hWave, @hdr, sizeof(hdr));
sleep(500);
while waveOutUnprepareHeader(hWave, @hdr, sizeof(hdr)) = WAVERR_STILLPLAYING do
if PlaySoundStopper^ then
begin
waveOutPause(hWave);
waveOutUnprepareHeader(hWave, @hdr, sizeof(hdr));
break;
end
else
sleep(100);
finally
SoundPlayerActive := false;
waveOutClose(hWave);
FreeMem(buf);
end;
except
on E: Exception do MessageBox(0, PChar(E.ClassName + ': ' + E.Message), 'Sound Playback Error', MB_ICONERROR);
end;
end;
,其中
type
TASWaveformSample = integer; // signed 32-bit; -2147483648..2147483647
TASWaveformSamples = packed array of TASWaveformSample; // one channel
PASSound = ^TASSound;
TASSound = record
Channels: packed array of TASWaveformSamples;
SampleRate: cardinal;
end;
或许更好的方法是使用线程进行播放。然后我做
var
OwnerForm: HWND; // = 0;
SndSource: PASSound; // = nil;
ThreadPlaying: boolean; // = false;
type
TSoundPlayerThread = class(TThread)
private
{ Private declarations }
protected
procedure Execute; override;
end;
实施为
procedure TSoundPlayerThread.Execute;
var
hWave: HWAVEOUT;
hdr: TWaveHdr;
buf: PAnsiChar;
fmt: TWaveFormatEx;
i: Integer;
n: Integer;
begin
ThreadPlaying := true;
try
try
if not Assigned(SndSource) then
Exit;
with fmt do
begin
wFormatTag := WAVE_FORMAT_PCM;
nChannels := length(SndSource^.Channels);
nSamplesPerSec := SndSource^.SampleRate;
wBitsPerSample := 32;
nAvgBytesPerSec := nChannels * nSamplesPerSec * wBitsPerSample div 8;
nBlockAlign := nChannels * wBitsPerSample div 8;
cbSize := 0;
end;
GetMem(buf, fmt.nChannels * length(SndSource^.Channels[0]) * sizeof(TASWaveformSample));
if length(SndSource^.Channels) = 1 then
CopyMemory(buf, @(SndSource^.Channels[0, 0]), length(SndSource^.Channels[0]) * sizeof(TASWaveformSample))
else
for i := 0 to high(SndSource^.Channels[0]) do
for n := 0 to high(SndSource^.Channels) do
CopyMemory(buf + sizeof(TASWaveformSample) * (i * fmt.nChannels + n), @(SndSource^.Channels[n, i]), sizeof(TASWaveformSample));
if waveOutOpen(@hWave, WAVE_MAPPER, @fmt, 0, 0, CALLBACK_NULL) <> MMSYSERR_NOERROR then
raise Exception.Create('SoundPlayerThread.Execute: waveOutOpen failed: ' + SysErrorMessage(GetLastError));
ZeroMemory(@hdr, sizeof(hdr));
with hdr do
begin
lpData := buf;
dwBufferLength := fmt.nChannels * length(SndSource^.Channels[0]) * sizeof(TASWaveformSample);
dwFlags := 0;
end;
waveOutPrepareHeader(hWave, @hdr, sizeof(hdr));
waveOutWrite(hWave, @hdr, sizeof(hdr));
sleep(500);
while waveOutUnprepareHeader(hWave, @hdr, sizeof(hdr)) = WAVERR_STILLPLAYING do
begin
sleep(100);
if Terminated then
waveOutReset(hWave);
end;
waveOutClose(hWave);
FreeMem(buf);
except
on E: Exception do MessageBox(0, PChar(E.ClassName + ': ' + E.Message), 'TSoundPlayerThread', MB_ICONERROR);
end;
finally
ThreadPlaying := false;
end;
end;
答案 1 :(得分:4)
Wave Audio Package有TLiveAudioPlayer组件。它从缓冲区播放音频。
答案 2 :(得分:2)
Microsoft有Knowledge Base article告诉您如何使用MCI从内存中播放声音。您可能需要在数组中使用wave文件头,或者在第一次读取时复制正确的数据,但除此之外,它应该相当容易移植。
答案 3 :(得分:2)
Win32 API PlaySound函数可以使用其SND_MEMORY
标志从内存块播放标准的RIFF编码音频(如WAV音频)。或者,如果音频位于应用的资源中,则可以改为使用SND_RESOURCE
标志。
答案 4 :(得分:0)
我找不到不基于过时的 sndPlaySound 的完整解决方案,所以这里有两个函数可以从 TMemoryStream 和文件中播放“.wav”文件:
uses mmsystem;
procedure PlaySoundFromFile(FileName : String);
var
mStream : TMemoryStream;
begin
mStream := TMemoryStream.Create;
Try mStream.LoadFromFile(FileName); Except End;
If mStream.Size > 0 then PlaySoundFromStream(mStream);
mStream.Free;
end;
procedure PlaySoundFromStream(mStream : TMemoryStream);
begin
PlaySound(mStream.Memory,0,SND_MEMORY or SND_SYNC);
end;
声音是同步播放的,您可以从记忆中找到其他 PlaySound 标志,在 Remy 的回答的链接中。如果切换到异步播放,请确保在播放结束前不要清除声音记忆。