gecko/content/media/AudioSegment.h
Chris Pearce 9abb830db0 Bug 811381 - Remove ns prefix from media code. r=roc
--HG--
rename : content/media/nsAudioAvailableEventManager.cpp => content/media/AudioAvailableEventManager.cpp
rename : content/media/nsAudioAvailableEventManager.h => content/media/AudioAvailableEventManager.h
rename : content/media/nsAudioStream.cpp => content/media/AudioStream.cpp
rename : content/media/nsAudioStream.h => content/media/AudioStream.h
rename : content/media/nsMediaCache.cpp => content/media/MediaCache.cpp
rename : content/media/nsMediaCache.h => content/media/MediaCache.h
rename : content/media/nsBuiltinDecoder.cpp => content/media/MediaDecoder.cpp
rename : content/media/nsBuiltinDecoder.h => content/media/MediaDecoder.h
rename : content/media/nsBuiltinDecoderReader.cpp => content/media/MediaDecoderReader.cpp
rename : content/media/nsBuiltinDecoderReader.h => content/media/MediaDecoderReader.h
rename : content/media/nsBuiltinDecoderStateMachine.cpp => content/media/MediaDecoderStateMachine.cpp
rename : content/media/nsBuiltinDecoderStateMachine.h => content/media/MediaDecoderStateMachine.h
rename : content/media/dash/nsDASHDecoder.cpp => content/media/dash/DASHDecoder.cpp
rename : content/media/dash/nsDASHDecoder.h => content/media/dash/DASHDecoder.h
rename : content/media/dash/nsDASHReader.cpp => content/media/dash/DASHReader.cpp
rename : content/media/dash/nsDASHReader.h => content/media/dash/DASHReader.h
rename : content/media/dash/nsDASHRepDecoder.cpp => content/media/dash/DASHRepDecoder.cpp
rename : content/media/dash/nsDASHRepDecoder.h => content/media/dash/DASHRepDecoder.h
rename : content/media/gstreamer/nsGStreamerDecoder.cpp => content/media/gstreamer/GStreamerDecoder.cpp
rename : content/media/gstreamer/nsGStreamerDecoder.h => content/media/gstreamer/GStreamerDecoder.h
rename : content/media/gstreamer/nsGStreamerReader.cpp => content/media/gstreamer/GStreamerReader.cpp
rename : content/media/gstreamer/nsGStreamerReader.h => content/media/gstreamer/GStreamerReader.h
rename : content/media/ogg/nsOggCodecState.cpp => content/media/ogg/OggCodecState.cpp
rename : content/media/ogg/nsOggCodecState.h => content/media/ogg/OggCodecState.h
rename : content/media/ogg/nsOggDecoder.cpp => content/media/ogg/OggDecoder.cpp
rename : content/media/ogg/nsOggDecoder.h => content/media/ogg/OggDecoder.h
rename : content/media/ogg/nsOggReader.cpp => content/media/ogg/OggReader.cpp
rename : content/media/ogg/nsOggReader.h => content/media/ogg/OggReader.h
rename : content/media/omx/nsMediaOmxDecoder.cpp => content/media/omx/MediaOmxDecoder.cpp
rename : content/media/omx/nsMediaOmxDecoder.h => content/media/omx/MediaOmxDecoder.h
rename : content/media/omx/nsMediaOmxReader.cpp => content/media/omx/MediaOmxReader.cpp
rename : content/media/omx/nsMediaOmxReader.h => content/media/omx/MediaOmxReader.h
rename : content/media/plugins/nsMediaPluginDecoder.cpp => content/media/plugins/MediaPluginDecoder.cpp
rename : content/media/plugins/nsMediaPluginDecoder.h => content/media/plugins/MediaPluginDecoder.h
rename : content/media/plugins/nsMediaPluginHost.cpp => content/media/plugins/MediaPluginHost.cpp
rename : content/media/plugins/nsMediaPluginHost.h => content/media/plugins/MediaPluginHost.h
rename : content/media/plugins/nsMediaPluginReader.cpp => content/media/plugins/MediaPluginReader.cpp
rename : content/media/plugins/nsMediaPluginReader.h => content/media/plugins/MediaPluginReader.h
rename : content/media/raw/nsRawDecoder.cpp => content/media/raw/RawDecoder.cpp
rename : content/media/raw/nsRawDecoder.h => content/media/raw/RawDecoder.h
rename : content/media/raw/nsRawReader.cpp => content/media/raw/RawReader.cpp
rename : content/media/raw/nsRawReader.h => content/media/raw/RawReader.h
rename : content/media/raw/nsRawStructs.h => content/media/raw/RawStructs.h
rename : content/media/wave/nsWaveDecoder.cpp => content/media/wave/WaveDecoder.cpp
rename : content/media/wave/nsWaveDecoder.h => content/media/wave/WaveDecoder.h
rename : content/media/wave/nsWaveReader.cpp => content/media/wave/WaveReader.cpp
rename : content/media/wave/nsWaveReader.h => content/media/wave/WaveReader.h
rename : content/media/webm/nsWebMBufferedParser.cpp => content/media/webm/WebMBufferedParser.cpp
rename : content/media/webm/nsWebMBufferedParser.h => content/media/webm/WebMBufferedParser.h
rename : content/media/webm/nsWebMDecoder.cpp => content/media/webm/WebMDecoder.cpp
rename : content/media/webm/nsWebMDecoder.h => content/media/webm/WebMDecoder.h
rename : content/media/webm/nsWebMReader.cpp => content/media/webm/WebMReader.cpp
rename : content/media/webm/nsWebMReader.h => content/media/webm/WebMReader.h
2012-11-14 11:46:40 -08:00

123 lines
3.8 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_AUDIOSEGMENT_H_
#define MOZILLA_AUDIOSEGMENT_H_
#include "MediaSegment.h"
#include "nsISupportsImpl.h"
#include "AudioSampleFormat.h"
#include "SharedBuffer.h"
namespace mozilla {
class AudioStream;
struct AudioChunk {
typedef mozilla::AudioSampleFormat SampleFormat;
// Generic methods
void SliceTo(TrackTicks aStart, TrackTicks aEnd)
{
NS_ASSERTION(aStart >= 0 && aStart < aEnd && aEnd <= mDuration,
"Slice out of bounds");
if (mBuffer) {
mOffset += int32_t(aStart);
}
mDuration = aEnd - aStart;
}
TrackTicks GetDuration() const { return mDuration; }
bool CanCombineWithFollowing(const AudioChunk& aOther) const
{
if (aOther.mBuffer != mBuffer) {
return false;
}
if (mBuffer) {
NS_ASSERTION(aOther.mBufferFormat == mBufferFormat && aOther.mBufferLength == mBufferLength,
"Wrong metadata about buffer");
return aOther.mOffset == mOffset + mDuration && aOther.mVolume == mVolume;
}
return true;
}
bool IsNull() const { return mBuffer == nullptr; }
void SetNull(TrackTicks aDuration)
{
mBuffer = nullptr;
mDuration = aDuration;
mOffset = 0;
mVolume = 1.0f;
}
TrackTicks mDuration; // in frames within the buffer
nsRefPtr<SharedBuffer> mBuffer; // null means data is all zeroes
int32_t mBufferLength; // number of frames in mBuffer (only meaningful if mBuffer is nonnull)
SampleFormat mBufferFormat; // format of frames in mBuffer (only meaningful if mBuffer is nonnull)
int32_t mOffset; // in frames within the buffer (zero if mBuffer is null)
float mVolume; // volume multiplier to apply (1.0f if mBuffer is nonnull)
};
/**
* A list of audio samples consisting of a sequence of slices of SharedBuffers.
* The audio rate is determined by the track, not stored in this class.
*/
class AudioSegment : public MediaSegmentBase<AudioSegment, AudioChunk> {
public:
typedef mozilla::AudioSampleFormat SampleFormat;
AudioSegment() : MediaSegmentBase<AudioSegment, AudioChunk>(AUDIO), mChannels(0) {}
bool IsInitialized()
{
return mChannels > 0;
}
void Init(int32_t aChannels)
{
NS_ASSERTION(aChannels > 0, "Bad number of channels");
NS_ASSERTION(!IsInitialized(), "Already initialized");
mChannels = aChannels;
}
int32_t GetChannels()
{
NS_ASSERTION(IsInitialized(), "Not initialized");
return mChannels;
}
void AppendFrames(already_AddRefed<SharedBuffer> aBuffer, int32_t aBufferLength,
int32_t aStart, int32_t aEnd, SampleFormat aFormat)
{
NS_ASSERTION(mChannels > 0, "Not initialized");
AudioChunk* chunk = AppendChunk(aEnd - aStart);
chunk->mBuffer = aBuffer;
chunk->mBufferFormat = aFormat;
chunk->mBufferLength = aBufferLength;
chunk->mOffset = aStart;
chunk->mVolume = 1.0f;
}
void ApplyVolume(float aVolume);
/**
* aOutput must have a matching number of channels, but we will automatically
* convert sample formats.
*/
void WriteTo(AudioStream* aOutput);
// Segment-generic methods not in MediaSegmentBase
void InitFrom(const AudioSegment& aOther)
{
NS_ASSERTION(mChannels == 0, "Channels already set");
mChannels = aOther.mChannels;
}
void CheckCompatible(const AudioSegment& aOther) const
{
NS_ASSERTION(aOther.mChannels == mChannels, "Non-matching channels");
}
static Type StaticType() { return AUDIO; }
protected:
int32_t mChannels;
};
}
#endif /* MOZILLA_AUDIOSEGMENT_H_ */