mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
124 lines
4.6 KiB
C++
124 lines
4.6 KiB
C++
/* -*- 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 ***** */
|
|
#if !defined(nsAudioStream_h_)
|
|
#define nsAudioStream_h_
|
|
|
|
#include "nscore.h"
|
|
#include "nsISupportsImpl.h"
|
|
#include "nsIThread.h"
|
|
#include "nsAutoPtr.h"
|
|
|
|
class nsAudioStream : public nsISupports
|
|
{
|
|
public:
|
|
|
|
enum SampleFormat
|
|
{
|
|
FORMAT_U8,
|
|
FORMAT_S16_LE,
|
|
FORMAT_FLOAT32
|
|
};
|
|
|
|
// Initialize Audio Library. Some Audio backends require initializing the
|
|
// library before using it.
|
|
static void InitLibrary();
|
|
|
|
// Shutdown Audio Library. Some Audio backends require shutting down the
|
|
// library after using it.
|
|
static void ShutdownLibrary();
|
|
|
|
// Thread, usually for MOZ_IPC handling, that is shared between audio streams.
|
|
// This may return null in the child process
|
|
virtual nsIThread *GetThread();
|
|
|
|
// AllocateStream will return either a local stream or a remoted stream
|
|
// depending on where you call it from. If MOZ_IPC is enabled, and you
|
|
// call this from a child process, you may recieve an implementation which
|
|
// forwards to a compositing process.
|
|
static nsAudioStream* AllocateStream();
|
|
|
|
// Initialize the audio stream. aNumChannels is the number of audio channels
|
|
// (1 for mono, 2 for stereo, etc) and aRate is the frequency of the sound
|
|
// samples (22050, 44100, etc).
|
|
virtual nsresult Init(PRInt32 aNumChannels, PRInt32 aRate, SampleFormat aFormat) = 0;
|
|
|
|
// Closes the stream. All future use of the stream is an error.
|
|
virtual void Shutdown() = 0;
|
|
|
|
// Write sound data to the audio hardware. aBuf is an array of samples in
|
|
// the format specified by mFormat of length aCount. aCount should be
|
|
// evenly divisible by the number of channels in this audio stream.
|
|
// When aBlocking is PR_TRUE, we'll block until the write has completed,
|
|
// otherwise we'll buffer any data we can't write immediately, and write
|
|
// it in a later call.
|
|
virtual nsresult Write(const void* aBuf, PRUint32 aCount, PRBool aBlocking) = 0;
|
|
|
|
// Return the number of sound samples that can be written to the audio device
|
|
// without blocking.
|
|
virtual PRUint32 Available() = 0;
|
|
|
|
// Set the current volume of the audio playback. This is a value from
|
|
// 0 (meaning muted) to 1 (meaning full volume).
|
|
virtual void SetVolume(float aVolume) = 0;
|
|
|
|
// Block until buffered audio data has been consumed.
|
|
virtual void Drain() = 0;
|
|
|
|
// Pause audio playback
|
|
virtual void Pause() = 0;
|
|
|
|
// Resume audio playback
|
|
virtual void Resume() = 0;
|
|
|
|
// Return the position in milliseconds of the sample being played by the
|
|
// audio hardware.
|
|
virtual PRInt64 GetPosition() = 0;
|
|
|
|
// Return the position, measured in samples played since the start, by
|
|
// the audio hardware.
|
|
virtual PRInt64 GetSampleOffset() = 0;
|
|
|
|
// Returns PR_TRUE when the audio stream is paused.
|
|
virtual PRBool IsPaused() = 0;
|
|
|
|
protected:
|
|
nsCOMPtr<nsIThread> mAudioPlaybackThread;
|
|
};
|
|
|
|
#endif
|