gecko/content/media/nsAudioStream.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla code.
*
* The Initial Developer of the Original Code is the Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Chris Double <chris.double@double.co.nz>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifdef MOZ_IPC
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/PAudioChild.h"
#include "mozilla/dom/AudioChild.h"
#include "mozilla/Monitor.h"
#include "nsXULAppAPI.h"
using namespace mozilla::dom;
#endif
#include <stdio.h>
#include <math.h>
#include "prlog.h"
#include "prmem.h"
#include "nsAutoPtr.h"
#include "nsAudioStream.h"
#include "nsAlgorithm.h"
extern "C" {
#include "sydneyaudio/sydney_audio.h"
}
#include "mozilla/TimeStamp.h"
#include "nsThreadUtils.h"
#if defined(XP_MACOSX)
#define SA_PER_STREAM_VOLUME 1
#endif
using mozilla::TimeStamp;
#ifdef PR_LOGGING
PRLogModuleInfo* gAudioStreamLog = nsnull;
#endif
#define FAKE_BUFFER_SIZE 176400
#define MILLISECONDS_PER_SECOND 1000
class nsAudioStreamLocal : public nsAudioStream
{
public:
NS_DECL_ISUPPORTS
~nsAudioStreamLocal();
nsAudioStreamLocal();
nsresult Init(PRInt32 aNumChannels, PRInt32 aRate, SampleFormat aFormat);
void Shutdown();
nsresult Write(const void* aBuf, PRUint32 aCount, PRBool aBlocking);
PRUint32 Available();
void SetVolume(float aVolume);
void Drain();
void Pause();
void Resume();
PRInt64 GetPosition();
PRInt64 GetSampleOffset();
PRBool IsPaused();
private:
double mVolume;
void* mAudioHandle;
int mRate;
int mChannels;
SampleFormat mFormat;
// When a Write() request is made, and the number of samples
// requested to be written exceeds the buffer size of the audio
// backend, the remaining samples are stored in this variable. They
// will be written on the next Write() request.
nsTArray<short> mBufferOverflow;
// PR_TRUE if this audio stream is paused.
PRPackedBool mPaused;
// PR_TRUE if this stream has encountered an error.
PRPackedBool mInError;
};
#ifdef MOZ_IPC
class nsAudioStreamRemote : public nsAudioStream
{
public:
NS_DECL_ISUPPORTS
nsAudioStreamRemote();
~nsAudioStreamRemote();
nsresult Init(PRInt32 aNumChannels, PRInt32 aRate, SampleFormat aFormat);
void Shutdown();
nsresult Write(const void* aBuf, PRUint32 aCount, PRBool aBlocking);
PRUint32 Available();
void SetVolume(float aVolume);
void Drain();
void Pause();
void Resume();
PRInt64 GetPosition();
PRInt64 GetSampleOffset();
PRBool IsPaused();
nsRefPtr<AudioChild> mAudioChild;
SampleFormat mFormat;
int mRate;
int mChannels;
PRInt32 mBytesPerSample;
// PR_TRUE if this audio stream is paused.
PRPackedBool mPaused;
friend class AudioInitEvent;
};
class AudioInitEvent : public nsRunnable
{
public:
AudioInitEvent(nsAudioStreamRemote* owner)
{
mOwner = owner;
}
NS_IMETHOD Run()
{
ContentChild * cpc = ContentChild::GetSingleton();
NS_ASSERTION(cpc, "Content Protocol is NULL!");
mOwner->mAudioChild = static_cast<AudioChild*> (cpc->SendPAudioConstructor(mOwner->mChannels,
mOwner->mRate,
mOwner->mFormat));
return NS_OK;
}
nsRefPtr<nsAudioStreamRemote> mOwner;
};
class AudioWriteEvent : public nsRunnable
{
public:
AudioWriteEvent(AudioChild* aChild,
const void* aBuf,
PRUint32 aNumberOfSamples,
PRUint32 aBytesPerSample)
{
mAudioChild = aChild;
mBytesPerSample = aBytesPerSample;
mBuffer.Assign((const char*)aBuf, aNumberOfSamples*aBytesPerSample);
}
NS_IMETHOD Run()
{
if (!mAudioChild->IsIPCOpen())
return NS_OK;
mAudioChild->SendWrite(mBuffer,
mBuffer.Length() / mBytesPerSample);
return NS_OK;
}
nsRefPtr<AudioChild> mAudioChild;
nsCString mBuffer;
PRUint32 mBytesPerSample;
};
class AudioSetVolumeEvent : public nsRunnable
{
public:
AudioSetVolumeEvent(AudioChild* aChild, float volume)
{
mAudioChild = aChild;
mVolume = volume;
}
NS_IMETHOD Run()
{
if (!mAudioChild->IsIPCOpen())
return NS_OK;
mAudioChild->SendSetVolume(mVolume);
return NS_OK;
}
nsRefPtr<AudioChild> mAudioChild;
float mVolume;
};
class AudioDrainEvent : public nsRunnable
{
public:
AudioDrainEvent(AudioChild* aChild)
{
mAudioChild = aChild;
}
NS_IMETHOD Run()
{
if (!mAudioChild->IsIPCOpen())
return NS_OK;
mAudioChild->SendDrain();
return NS_OK;
}
nsRefPtr<AudioChild> mAudioChild;
};
class AudioPauseEvent : public nsRunnable
{
public:
AudioPauseEvent(AudioChild* aChild, PRBool pause)
{
mAudioChild = aChild;
mPause = pause;
}
NS_IMETHOD Run()
{
if (!mAudioChild->IsIPCOpen())
return NS_OK;
if (mPause)
mAudioChild->SendPause();
else
mAudioChild->SendResume();
return NS_OK;
}
nsRefPtr<AudioChild> mAudioChild;
PRBool mPause;
};
class AudioShutdownEvent : public nsRunnable
{
public:
AudioShutdownEvent(AudioChild* aChild)
{
mAudioChild = aChild;
}
NS_IMETHOD Run()
{
if (mAudioChild->IsIPCOpen())
PAudioChild::Send__delete__(mAudioChild);
return NS_OK;
}
nsRefPtr<AudioChild> mAudioChild;
};
#endif // MOZ_IPC
void nsAudioStream::InitLibrary()
{
#ifdef PR_LOGGING
gAudioStreamLog = PR_NewLogModule("nsAudioStream");
#endif
}
void nsAudioStream::ShutdownLibrary()
{
}
nsIThread *
nsAudioStream::GetThread()
{
return mAudioPlaybackThread;
}
nsAudioStream* nsAudioStream::AllocateStream()
{
#ifdef MOZ_IPC
if (XRE_GetProcessType() == GeckoProcessType_Content) {
return new nsAudioStreamRemote();
}
#endif
return new nsAudioStreamLocal();
}
nsAudioStreamLocal::nsAudioStreamLocal() :
mVolume(1.0),
mAudioHandle(0),
mRate(0),
mChannels(0),
mFormat(FORMAT_S16_LE),
mPaused(PR_FALSE),
mInError(PR_FALSE)
{
#ifdef MOZ_IPC
// We only need this thread in the main process.
if (XRE_GetProcessType() == GeckoProcessType_Default) {
NS_NewThread(getter_AddRefs(mAudioPlaybackThread));
}
#endif
}
nsAudioStreamLocal::~nsAudioStreamLocal()
{
Shutdown();
}
NS_IMPL_THREADSAFE_ISUPPORTS0(nsAudioStreamLocal)
nsresult nsAudioStreamLocal::Init(PRInt32 aNumChannels, PRInt32 aRate, SampleFormat aFormat)
{
mRate = aRate;
mChannels = aNumChannels;
mFormat = aFormat;
if (sa_stream_create_pcm(reinterpret_cast<sa_stream_t**>(&mAudioHandle),
NULL,
SA_MODE_WRONLY,
SA_PCM_FORMAT_S16_NE,
aRate,
aNumChannels) != SA_SUCCESS) {
mAudioHandle = nsnull;
mInError = PR_TRUE;
PR_LOG(gAudioStreamLog, PR_LOG_ERROR, ("nsAudioStreamLocal: sa_stream_create_pcm error"));
return NS_ERROR_FAILURE;
}
if (sa_stream_open(static_cast<sa_stream_t*>(mAudioHandle)) != SA_SUCCESS) {
sa_stream_destroy(static_cast<sa_stream_t*>(mAudioHandle));
mAudioHandle = nsnull;
mInError = PR_TRUE;
PR_LOG(gAudioStreamLog, PR_LOG_ERROR, ("nsAudioStreamLocal: sa_stream_open error"));
return NS_ERROR_FAILURE;
}
mInError = PR_FALSE;
return NS_OK;
}
void nsAudioStreamLocal::Shutdown()
{
if (!mAudioHandle)
return;
sa_stream_destroy(static_cast<sa_stream_t*>(mAudioHandle));
mAudioHandle = nsnull;
mInError = PR_TRUE;
}
nsresult nsAudioStreamLocal::Write(const void* aBuf, PRUint32 aCount, PRBool aBlocking)
{
NS_ABORT_IF_FALSE(aCount % mChannels == 0,
"Buffer size must be divisible by channel count");
NS_ASSERTION(!mPaused, "Don't write audio when paused, you'll block");
if (mInError)
return NS_ERROR_FAILURE;
PRUint32 offset = mBufferOverflow.Length();
PRUint32 count = aCount + offset;
nsAutoArrayPtr<short> s_data(new short[count]);
if (s_data) {
for (PRUint32 i=0; i < offset; ++i) {
s_data[i] = mBufferOverflow.ElementAt(i);
}
mBufferOverflow.Clear();
switch (mFormat) {
case FORMAT_U8: {
const PRUint8* buf = static_cast<const PRUint8*>(aBuf);
PRInt32 volume = PRInt32((1 << 16) * mVolume);
for (PRUint32 i = 0; i < aCount; ++i) {
s_data[i + offset] = short(((PRInt32(buf[i]) - 128) * volume) >> 8);
}
break;
}
case FORMAT_S16_LE: {
const short* buf = static_cast<const short*>(aBuf);
PRInt32 volume = PRInt32((1 << 16) * mVolume);
for (PRUint32 i = 0; i < aCount; ++i) {
short s = buf[i];
#if defined(IS_BIG_ENDIAN)
s = ((s & 0x00ff) << 8) | ((s & 0xff00) >> 8);
#endif
s_data[i + offset] = short((PRInt32(s) * volume) >> 16);
}
break;
}
case FORMAT_FLOAT32: {
const float* buf = static_cast<const float*>(aBuf);
for (PRUint32 i = 0; i < aCount; ++i) {
float scaled_value = floorf(0.5 + 32768 * buf[i] * mVolume);
if (buf[i] < 0.0) {
s_data[i + offset] = (scaled_value < -32768.0) ?
-32768 :
short(scaled_value);
} else {
s_data[i+offset] = (scaled_value > 32767.0) ?
32767 :
short(scaled_value);
}
}
break;
}
}
if (!aBlocking) {
// We're running in non-blocking mode, crop the data to the amount
// which is available in the audio buffer, and save the rest for
// subsequent calls.
PRUint32 available = Available();
if (available < count) {
mBufferOverflow.AppendElements(s_data.get() + available, (count - available));
count = available;
}
}
if (sa_stream_write(static_cast<sa_stream_t*>(mAudioHandle),
s_data.get(),
count * sizeof(short)) != SA_SUCCESS)
{
PR_LOG(gAudioStreamLog, PR_LOG_ERROR, ("nsAudioStreamLocal: sa_stream_write error"));
mInError = PR_TRUE;
return NS_ERROR_FAILURE;
}
}
return NS_OK;
}
PRUint32 nsAudioStreamLocal::Available()
{
// If the audio backend failed to open, lie and say we'll accept some
// data.
if (mInError)
return FAKE_BUFFER_SIZE;
size_t s = 0;
if (sa_stream_get_write_size(static_cast<sa_stream_t*>(mAudioHandle), &s) != SA_SUCCESS)
return 0;
return s / sizeof(short);
}
void nsAudioStreamLocal::SetVolume(float aVolume)
{
NS_ASSERTION(aVolume >= 0.0 && aVolume <= 1.0, "Invalid volume");
#if defined(SA_PER_STREAM_VOLUME)
if (sa_stream_set_volume_abs(static_cast<sa_stream_t*>(mAudioHandle), aVolume) != SA_SUCCESS) {
PR_LOG(gAudioStreamLog, PR_LOG_ERROR, ("nsAudioStreamLocal: sa_stream_set_volume_abs error"));
mInError = PR_TRUE;
}
#else
mVolume = aVolume;
#endif
}
void nsAudioStreamLocal::Drain()
{
if (mInError)
return;
// Write any remaining unwritten sound data in the overflow buffer
if (!mBufferOverflow.IsEmpty()) {
if (sa_stream_write(static_cast<sa_stream_t*>(mAudioHandle),
mBufferOverflow.Elements(),
mBufferOverflow.Length() * sizeof(short)) != SA_SUCCESS)
PR_LOG(gAudioStreamLog, PR_LOG_ERROR, ("nsAudioStreamLocal: sa_stream_write error"));
mInError = PR_TRUE;
return;
}
int r = sa_stream_drain(static_cast<sa_stream_t*>(mAudioHandle));
if (r != SA_SUCCESS && r != SA_ERROR_INVALID) {
PR_LOG(gAudioStreamLog, PR_LOG_ERROR, ("nsAudioStreamLocal: sa_stream_drain error"));
mInError = PR_TRUE;
}
}
void nsAudioStreamLocal::Pause()
{
if (mInError)
return;
mPaused = PR_TRUE;
sa_stream_pause(static_cast<sa_stream_t*>(mAudioHandle));
}
void nsAudioStreamLocal::Resume()
{
if (mInError)
return;
mPaused = PR_FALSE;
sa_stream_resume(static_cast<sa_stream_t*>(mAudioHandle));
}
PRInt64 nsAudioStreamLocal::GetPosition()
{
PRInt64 sampleOffset = GetSampleOffset();
if (sampleOffset >= 0) {
return ((MILLISECONDS_PER_SECOND * sampleOffset) / mRate / mChannels);
}
return -1;
}
PRInt64 nsAudioStreamLocal::GetSampleOffset()
{
if (mInError) {
return -1;
}
sa_position_t positionType = SA_POSITION_WRITE_SOFTWARE;
#if defined(XP_WIN)
positionType = SA_POSITION_WRITE_HARDWARE;
#endif
PRInt64 position = 0;
if (sa_stream_get_position(static_cast<sa_stream_t*>(mAudioHandle),
positionType, &position) == SA_SUCCESS) {
return position / sizeof(short);
}
return -1;
}
PRBool nsAudioStreamLocal::IsPaused()
{
return mPaused;
}
#ifdef MOZ_IPC
nsAudioStreamRemote::nsAudioStreamRemote()
: mAudioChild(NULL),
mFormat(FORMAT_S16_LE),
mRate(0),
mChannels(0),
mPaused(PR_FALSE),
mBytesPerSample(1)
{}
nsAudioStreamRemote::~nsAudioStreamRemote()
{
Shutdown();
}
NS_IMPL_THREADSAFE_ISUPPORTS0(nsAudioStreamRemote)
nsresult
nsAudioStreamRemote::Init(PRInt32 aNumChannels,
PRInt32 aRate,
SampleFormat aFormat)
{
mRate = aRate;
mChannels = aNumChannels;
mFormat = aFormat;
switch (mFormat) {
case FORMAT_U8: {
mBytesPerSample = sizeof(PRUint8);
break;
}
case FORMAT_S16_LE: {
mBytesPerSample = sizeof(short);
break;
}
case FORMAT_FLOAT32: {
mBytesPerSample = sizeof(float);
}
}
nsCOMPtr<nsIRunnable> event = new AudioInitEvent(this);
NS_DispatchToMainThread(event, NS_DISPATCH_SYNC);
return NS_OK;
}
void
nsAudioStreamRemote::Shutdown()
{
if (!mAudioChild)
return;
nsCOMPtr<nsIRunnable> event = new AudioShutdownEvent(mAudioChild);
NS_DispatchToMainThread(event);
mAudioChild = nsnull;
}
nsresult
nsAudioStreamRemote::Write(const void* aBuf,
PRUint32 aCount,
PRBool aBlocking)
{
if (!mAudioChild)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIRunnable> event = new AudioWriteEvent(mAudioChild,
aBuf,
aCount,
mBytesPerSample);
NS_DispatchToMainThread(event);
return NS_OK;
}
PRUint32
nsAudioStreamRemote::Available()
{
return FAKE_BUFFER_SIZE;
}
void
nsAudioStreamRemote::SetVolume(float aVolume)
{
if (!mAudioChild)
return;
nsCOMPtr<nsIRunnable> event = new AudioSetVolumeEvent(mAudioChild, aVolume);
NS_DispatchToMainThread(event);
}
void
nsAudioStreamRemote::Drain()
{
if (!mAudioChild)
return;
nsCOMPtr<nsIRunnable> event = new AudioDrainEvent(mAudioChild);
NS_DispatchToMainThread(event);
mAudioChild->WaitForDrain();
}
void
nsAudioStreamRemote::Pause()
{
mPaused = PR_TRUE;
if (!mAudioChild)
return;
nsCOMPtr<nsIRunnable> event = new AudioPauseEvent(mAudioChild, PR_TRUE);
NS_DispatchToMainThread(event);
}
void
nsAudioStreamRemote::Resume()
{
mPaused = PR_FALSE;
if (!mAudioChild)
return;
nsCOMPtr<nsIRunnable> event = new AudioPauseEvent(mAudioChild, PR_FALSE);
NS_DispatchToMainThread(event);
}
PRInt64 nsAudioStreamRemote::GetPosition()
{
PRInt64 sampleOffset = GetSampleOffset();
if (sampleOffset >= 0) {
return ((MILLISECONDS_PER_SECOND * sampleOffset) / mRate / mChannels);
}
return 0;
}
PRInt64
nsAudioStreamRemote::GetSampleOffset()
{
if(!mAudioChild)
return 0;
PRInt64 offset = mAudioChild->GetLastKnownSampleOffset();
if (offset == -1)
return 0;
PRInt64 time = mAudioChild->GetLastKnownSampleOffsetTime();
PRInt64 result = offset + (mRate * mChannels * (PR_IntervalNow() - time) / MILLISECONDS_PER_SECOND);
return result;
}
PRBool
nsAudioStreamRemote::IsPaused()
{
return mPaused;
}
#endif // MOZ_IPC