Aegisub/aegisub/audio_player_dsound.cpp

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// Copyright (c) 2006, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
#pragma once
///////////
// Headers
#include "setup.h"
#if USE_DIRECTSOUND == 1
#include <wx/wxprec.h>
#include "audio_provider.h"
#include "audio_player_dsound.h"
#include "utils.h"
#include "main.h"
#include "frame_main.h"
///////////////
// Constructor
DirectSoundPlayer::DirectSoundPlayer() {
playing = false;
volume = 1.0f;
playPos = 0;
startPos = 0;
endPos = 0;
offset = 0;
buffer = NULL;
directSound = NULL;
thread = NULL;
}
//////////////
// Destructor
DirectSoundPlayer::~DirectSoundPlayer() {
CloseStream();
}
///////////////
// Open stream
void DirectSoundPlayer::OpenStream() {
// Get provider
AudioProvider *provider = GetProvider();
// Initialize the DirectSound object
HRESULT res;
res = DirectSoundCreate8(&DSDEVID_DefaultPlayback,&directSound,NULL); // TODO: support selecting audio device
if (FAILED(res)) throw _T("Failed initializing DirectSound");
// Set DirectSound parameters
AegisubApp *app = (AegisubApp*) wxTheApp;
directSound->SetCooperativeLevel((HWND)app->frame->GetHandle(),DSSCL_PRIORITY);
// Create the wave format structure
WAVEFORMATEX waveFormat;
waveFormat.wFormatTag = WAVE_FORMAT_PCM;
waveFormat.nSamplesPerSec = provider->GetSampleRate();
waveFormat.nChannels = provider->GetChannels();
waveFormat.wBitsPerSample = provider->GetBytesPerSample() * 8;
waveFormat.nBlockAlign = waveFormat.nChannels * waveFormat.wBitsPerSample / 8;
waveFormat.nAvgBytesPerSec = waveFormat.nSamplesPerSec * waveFormat.nBlockAlign;
waveFormat.cbSize = 0;
// Create the buffer initializer
int aim = waveFormat.nAvgBytesPerSec + waveFormat.nAvgBytesPerSec/2; // one and a half second of buffer
int min = DSBSIZE_MIN;
int max = DSBSIZE_MAX;
bufSize = MIN(MAX(min,aim),max);
DSBUFFERDESC desc;
desc.dwSize = sizeof(DSBUFFERDESC);
desc.dwFlags = DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_GLOBALFOCUS | DSBCAPS_CTRLPOSITIONNOTIFY;
desc.dwBufferBytes = bufSize;
desc.dwReserved = 0;
desc.lpwfxFormat = &waveFormat;
desc.guid3DAlgorithm = GUID_NULL;
// Create the buffer
IDirectSoundBuffer *buf;
res = directSound->CreateSoundBuffer(&desc,&buf,NULL);
if (res != DS_OK) throw _T("Failed creating DirectSound buffer");
// Copy interface to buffer
res = buf->QueryInterface(IID_IDirectSoundBuffer8,(LPVOID*) &buffer);
if (res != S_OK) throw _T("Failed casting interface to IDirectSoundBuffer8");
// Set data
offset = 0;
}
////////////////
// Close stream
void DirectSoundPlayer::CloseStream() {
// Stop it
Stop();
// Unref the DirectSound buffer
if (buffer) {
buffer->Release();
buffer = NULL;
}
// Unref the DirectSound object
if (directSound) {
directSound->Release();
directSound = NULL;
}
}
///////////////
// Fill buffer
bool DirectSoundPlayer::FillBuffer(bool fill) {
if (playPos >= endPos) return false;
// Variables
HRESULT res;
void *ptr1, *ptr2;
unsigned long int size1, size2;
AudioProvider *provider = GetProvider();
int bytesps = provider->GetBytesPerSample();
// To write length
int toWrite = 0;
if (fill) {
toWrite = bufSize;
}
else {
DWORD bufplay;
res = buffer->GetCurrentPosition(&bufplay, NULL);
if (FAILED(res)) return false;
toWrite = (int)bufplay - (int)offset;
if (toWrite < 0) toWrite += bufSize;
}
if (toWrite == 0) return true;
// Lock buffer
RetryLock:
if (fill) {
res = buffer->Lock(offset, toWrite, &ptr1, &size1, &ptr2, &size2, 0);
}
else {
res = buffer->Lock(offset, toWrite, &ptr1, &size1, &ptr2, &size2, 0);//DSBLOCK_FROMWRITECURSOR);
}
// Buffer lost?
if (res == DSERR_BUFFERLOST) {
wxLogDebug(_T("Lost DSound buffer"));
buffer->Restore();
goto RetryLock;
}
// Error
if (FAILED(res)) return false;
// Update offset
offset = (offset + toWrite) % bufSize;
// Convert size to number of samples
unsigned long int count1 = size1 / bytesps;
unsigned long int count2 = size2 / bytesps;
// Check if remaining buffer is longer than remaining sound
unsigned long int totalCount = count1+count2;
unsigned long int left = 0;
if (endPos > playPos) left = endPos - playPos;
unsigned long int delta = 0;
if (totalCount > left) delta = totalCount - left;
// And only write the remaining samples
if (delta) {
// Lower counts
int temp = MIN(delta,count2);
count2 -= temp;
delta -= temp;
temp = MIN(delta,count1);
count1 -= temp;
delta -= temp;
}
// Get source wave
if (count1) provider->GetAudioWithVolume(ptr1, playPos, count1, volume);
if (count2) provider->GetAudioWithVolume(ptr2, playPos+count1, count2, volume);
playPos += count1+count2;
// Unlock
buffer->Unlock(ptr1,count1*bytesps,ptr2,count2*bytesps);
return delta==0; // If delta>0 we hit end of stream
}
////////
// Play
void DirectSoundPlayer::Play(__int64 start,__int64 count) {
// Make sure that it's stopped
Stop();
// The thread is now guaranteed dead
HRESULT res;
// We sure better have a buffer
assert(buffer);
// Set variables
startPos = start;
endPos = start+count;
playPos = start;
offset = 0;
// Fill whole buffer
FillBuffer(true);
// Start thread
thread = new DirectSoundPlayerThread(this);
thread->Create();
thread->Run();
// Play
buffer->SetCurrentPosition(0);
res = buffer->Play(0,0,DSBPLAY_LOOPING);
if (SUCCEEDED(res)) playing = true;
startTime = GetTickCount();
// Update timer
if (displayTimer && !displayTimer->IsRunning()) displayTimer->Start(15);
}
////////
// Stop
void DirectSoundPlayer::Stop(bool timerToo) {
// Stop the thread
if (thread) {
thread->Stop();
thread->Wait();
thread = NULL;
}
// The thread is now guaranteed dead and there are no concurrency problems to worry about
// Stop
if (buffer) buffer->Stop(); // the thread should have done this already
// Reset variables
playing = false;
playPos = 0;
startPos = 0;
endPos = 0;
offset = 0;
// Stop timer
if (timerToo && displayTimer) {
displayTimer->Stop();
}
}
///////////
// Set end
void DirectSoundPlayer::SetEndPosition(__int64 pos) {
if (playing) endPos = pos;
}
////////////////////////
// Set current position
void DirectSoundPlayer::SetCurrentPosition(__int64 pos) {
playPos = pos;
}
////////////////////////
// Get current position
__int64 DirectSoundPlayer::GetCurrentPosition() {
// Check if buffer is loaded
if (!buffer || !playing) return 0;
DWORD curtime = GetTickCount();
__int64 tdiff = curtime - startTime;
return startPos + tdiff * provider->GetSampleRate() / 1000;
}
//////////////////////
// Thread constructor
DirectSoundPlayerThread::DirectSoundPlayerThread(DirectSoundPlayer *par) : wxThread(wxTHREAD_JOINABLE) {
parent = par;
stopnotify = CreateEvent(NULL, true, false, NULL);
}
/////////////////////
// Thread destructor
DirectSoundPlayerThread::~DirectSoundPlayerThread() {
CloseHandle(stopnotify);
}
//////////////////////
// Thread entry point
wxThread::ExitCode DirectSoundPlayerThread::Entry() {
// Wake up thread every half second to fill buffer as needed
// This more or less assumes the buffer is at least one second long
while (WaitForSingleObject(stopnotify, 500)) {
if (!parent->FillBuffer(false)) {
// FillBuffer returns false when end of stream is reached
wxLogDebug(_T("DS thread hit end of stream"));
break;
}
}
// Now fill buffer with silence
DWORD bytesFilled = 0;
while (WaitForSingleObject(stopnotify, 500)) {
void *buf1, *buf2;
DWORD size1, size2;
DWORD playpos;
HRESULT res;
res = parent->buffer->GetCurrentPosition(&playpos, NULL);
if (FAILED(res)) break;
res = parent->buffer->Lock(parent->offset, (playpos-parent->offset)%parent->bufSize, &buf1, &size1, &buf2, &size2, 0);
if (FAILED(res)) break;
if (size1) memset(buf1, 0, size1);
if (size2) memset(buf2, 0, size2);
bytesFilled += size1 + size2;
parent->buffer->Unlock(buf1, size1, buf2, size2);
if (bytesFilled >= parent->bufSize) break;
}
wxLogDebug(_T("DS thread dead"));
parent->playing = false;
parent->buffer->Stop();
return 0;
}
////////////////////////
// Stop playback thread
void DirectSoundPlayerThread::Stop() {
// Increase the stopnotify by one, causing a wait for it to succeed
SetEvent(stopnotify);
}
#endif