зеркало из https://github.com/mozilla/gecko-dev.git
254 строки
9.6 KiB
C++
254 строки
9.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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/. */
|
|
#if !defined(AudioLayout_h)
|
|
#define AudioLayout_h
|
|
|
|
#include <cstdint>
|
|
#include <initializer_list>
|
|
#include "mozilla/MathAlgorithms.h"
|
|
#include "nsTArray.h"
|
|
|
|
namespace mozilla {
|
|
|
|
class AudioConfig {
|
|
public:
|
|
// Channel definition is conveniently defined to be in the same order as
|
|
// WAVEFORMAT && SMPTE, even though this is unused for now.
|
|
enum Channel {
|
|
CHANNEL_INVALID = -1,
|
|
CHANNEL_FRONT_LEFT = 0,
|
|
CHANNEL_FRONT_RIGHT,
|
|
CHANNEL_FRONT_CENTER,
|
|
CHANNEL_LFE,
|
|
CHANNEL_BACK_LEFT,
|
|
CHANNEL_BACK_RIGHT,
|
|
CHANNEL_FRONT_LEFT_OF_CENTER,
|
|
CHANNEL_FRONT_RIGHT_OF_CENTER,
|
|
CHANNEL_BACK_CENTER,
|
|
CHANNEL_SIDE_LEFT,
|
|
CHANNEL_SIDE_RIGHT,
|
|
// From WAVEFORMAT definition.
|
|
CHANNEL_TOP_CENTER,
|
|
CHANNEL_TOP_FRONT_LEFT,
|
|
CHANNEL_TOP_FRONT_CENTER,
|
|
CHANNEL_TOP_FRONT_RIGHT,
|
|
CHANNEL_TOP_BACK_LEFT,
|
|
CHANNEL_TOP_BACK_CENTER,
|
|
CHANNEL_TOP_BACK_RIGHT
|
|
};
|
|
|
|
class ChannelLayout {
|
|
public:
|
|
// The maximum number of channels a channel map can represent.
|
|
static constexpr uint32_t MAX_CHANNELS = 32;
|
|
|
|
typedef uint32_t ChannelMap;
|
|
|
|
ChannelLayout() : mChannelMap(UNKNOWN_MAP), mValid(false) {}
|
|
explicit ChannelLayout(uint32_t aChannels)
|
|
: ChannelLayout(aChannels, DefaultLayoutForChannels(aChannels)) {}
|
|
ChannelLayout(uint32_t aChannels, const Channel* aConfig)
|
|
: ChannelLayout() {
|
|
if (aChannels == 0 || !aConfig) {
|
|
return;
|
|
}
|
|
mChannels.AppendElements(aConfig, aChannels);
|
|
UpdateChannelMap();
|
|
}
|
|
explicit ChannelLayout(std::initializer_list<Channel> aChannelList)
|
|
: ChannelLayout(aChannelList.size(), aChannelList.begin()) {}
|
|
bool operator==(const ChannelLayout& aOther) const {
|
|
return mChannels == aOther.mChannels;
|
|
}
|
|
bool operator!=(const ChannelLayout& aOther) const {
|
|
return mChannels != aOther.mChannels;
|
|
}
|
|
const Channel& operator[](uint32_t aIndex) const {
|
|
MOZ_ASSERT(mChannels.Length() > aIndex);
|
|
return mChannels[aIndex];
|
|
}
|
|
uint32_t Count() const { return mChannels.Length(); }
|
|
ChannelMap Map() const;
|
|
|
|
// Calculate the mapping table from the current layout to aOther such that
|
|
// one can easily go from one layout to the other by doing:
|
|
// out[channel] = in[map[channel]].
|
|
// Returns true if the reordering is possible or false otherwise.
|
|
// If true, then aMap, if set, will be updated to contain the mapping table
|
|
// allowing conversion from the current layout to aOther.
|
|
// If aMap is empty, then MappingTable can be used to simply determine if
|
|
// the current layout can be easily reordered to aOther.
|
|
bool MappingTable(const ChannelLayout& aOther,
|
|
nsTArray<uint8_t>* aMap = nullptr) const;
|
|
bool IsValid() const { return mValid; }
|
|
bool HasChannel(Channel aChannel) const {
|
|
return mChannelMap & (1 << aChannel);
|
|
}
|
|
// Return the number of channels found in this ChannelMap.
|
|
static uint32_t Channels(ChannelMap aMap) {
|
|
static_assert(sizeof(ChannelMap) == sizeof(uint32_t),
|
|
"Must adjust ChannelMap type");
|
|
return CountPopulation32(aMap);
|
|
}
|
|
|
|
static ChannelLayout SMPTEDefault(const ChannelLayout& aChannelLayout);
|
|
static ChannelLayout SMPTEDefault(ChannelMap aMap);
|
|
|
|
static constexpr ChannelMap UNKNOWN_MAP = 0;
|
|
|
|
// Common channel layout definitions.
|
|
static constexpr ChannelMap LMONO_MAP = 1 << CHANNEL_FRONT_CENTER;
|
|
static constexpr ChannelMap LMONO_LFE_MAP =
|
|
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE;
|
|
static constexpr ChannelMap LSTEREO_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT;
|
|
static constexpr ChannelMap LSTEREO_LFE_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT | 1 << CHANNEL_LFE;
|
|
static constexpr ChannelMap L3F_MAP = 1 << CHANNEL_FRONT_LEFT |
|
|
1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_FRONT_CENTER;
|
|
static constexpr ChannelMap L3F_LFE_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE;
|
|
static constexpr ChannelMap L2F1_MAP = 1 << CHANNEL_FRONT_LEFT |
|
|
1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_BACK_CENTER;
|
|
static constexpr ChannelMap L2F1_LFE_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT | 1 << CHANNEL_LFE |
|
|
1 << CHANNEL_BACK_CENTER;
|
|
static constexpr ChannelMap L3F1_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_BACK_CENTER;
|
|
static constexpr ChannelMap LSURROUND_MAP = L3F1_MAP;
|
|
static constexpr ChannelMap L3F1_LFE_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE | 1 << CHANNEL_BACK_CENTER;
|
|
static constexpr ChannelMap L2F2_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_SIDE_LEFT | 1 << CHANNEL_SIDE_RIGHT;
|
|
static constexpr ChannelMap L2F2_LFE_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT | 1 << CHANNEL_LFE |
|
|
1 << CHANNEL_SIDE_LEFT | 1 << CHANNEL_SIDE_RIGHT;
|
|
static constexpr ChannelMap LQUAD_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_BACK_LEFT | 1 << CHANNEL_BACK_RIGHT;
|
|
static constexpr ChannelMap LQUAD_LFE_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT | 1 << CHANNEL_LFE |
|
|
1 << CHANNEL_BACK_LEFT | 1 << CHANNEL_BACK_RIGHT;
|
|
static constexpr ChannelMap L3F2_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_SIDE_LEFT |
|
|
1 << CHANNEL_SIDE_RIGHT;
|
|
static constexpr ChannelMap L3F2_LFE_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE | 1 << CHANNEL_SIDE_LEFT |
|
|
1 << CHANNEL_SIDE_RIGHT;
|
|
// 3F2_LFE Alias
|
|
static constexpr ChannelMap L5POINT1_SURROUND_MAP = L3F2_LFE_MAP;
|
|
static constexpr ChannelMap L3F2_BACK_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_BACK_LEFT |
|
|
1 << CHANNEL_BACK_RIGHT;
|
|
static constexpr ChannelMap L3F2_BACK_LFE_MAP =
|
|
L3F2_BACK_MAP | 1 << CHANNEL_LFE;
|
|
static constexpr ChannelMap L3F3R_LFE_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE |
|
|
1 << CHANNEL_BACK_CENTER | 1 << CHANNEL_SIDE_LEFT |
|
|
1 << CHANNEL_SIDE_RIGHT;
|
|
static ChannelLayout L3F4_LFE;
|
|
static constexpr ChannelMap L3F4_LFE_MAP =
|
|
1 << CHANNEL_FRONT_LEFT | 1 << CHANNEL_FRONT_RIGHT |
|
|
1 << CHANNEL_FRONT_CENTER | 1 << CHANNEL_LFE | 1 << CHANNEL_BACK_LEFT |
|
|
1 << CHANNEL_BACK_RIGHT | 1 << CHANNEL_SIDE_LEFT |
|
|
1 << CHANNEL_SIDE_RIGHT;
|
|
// 3F4_LFE Alias
|
|
static ChannelLayout L7POINT1_SURROUND;
|
|
static constexpr ChannelMap L7POINT1_SURROUND_MAP = L3F4_LFE_MAP;
|
|
|
|
private:
|
|
void UpdateChannelMap();
|
|
const Channel* DefaultLayoutForChannels(uint32_t aChannels) const;
|
|
AutoTArray<Channel, MAX_CHANNELS> mChannels;
|
|
ChannelMap mChannelMap;
|
|
bool mValid;
|
|
};
|
|
|
|
enum SampleFormat {
|
|
FORMAT_NONE = 0,
|
|
FORMAT_U8,
|
|
FORMAT_S16,
|
|
FORMAT_S24LSB,
|
|
FORMAT_S24,
|
|
FORMAT_S32,
|
|
FORMAT_FLT,
|
|
#if defined(MOZ_SAMPLE_TYPE_FLOAT32)
|
|
FORMAT_DEFAULT = FORMAT_FLT
|
|
#elif defined(MOZ_SAMPLE_TYPE_S16)
|
|
FORMAT_DEFAULT = FORMAT_S16
|
|
#else
|
|
#error "Not supported audio type"
|
|
#endif
|
|
};
|
|
|
|
AudioConfig(const ChannelLayout& aChannelLayout, uint32_t aRate,
|
|
AudioConfig::SampleFormat aFormat = FORMAT_DEFAULT,
|
|
bool aInterleaved = true);
|
|
AudioConfig(const ChannelLayout& aChannelLayout, uint32_t aChannels,
|
|
uint32_t aRate,
|
|
AudioConfig::SampleFormat aFormat = FORMAT_DEFAULT,
|
|
bool aInterleaved = true);
|
|
// Will create a channel configuration from default SMPTE ordering.
|
|
AudioConfig(uint32_t aChannels, uint32_t aRate,
|
|
AudioConfig::SampleFormat aFormat = FORMAT_DEFAULT,
|
|
bool aInterleaved = true);
|
|
|
|
const ChannelLayout& Layout() const { return mChannelLayout; }
|
|
uint32_t Channels() const {
|
|
if (!mChannelLayout.IsValid()) {
|
|
return mChannels;
|
|
}
|
|
return mChannelLayout.Count();
|
|
}
|
|
uint32_t Rate() const { return mRate; }
|
|
SampleFormat Format() const { return mFormat; }
|
|
bool Interleaved() const { return mInterleaved; }
|
|
bool operator==(const AudioConfig& aOther) const {
|
|
return mChannelLayout == aOther.mChannelLayout && mRate == aOther.mRate &&
|
|
mFormat == aOther.mFormat && mInterleaved == aOther.mInterleaved;
|
|
}
|
|
bool operator!=(const AudioConfig& aOther) const {
|
|
return !(*this == aOther);
|
|
}
|
|
|
|
bool IsValid() const {
|
|
return mChannelLayout.IsValid() && Format() != FORMAT_NONE && Rate() > 0;
|
|
}
|
|
|
|
static const char* FormatToString(SampleFormat aFormat);
|
|
static uint32_t SampleSize(SampleFormat aFormat);
|
|
static uint32_t FormatToBits(SampleFormat aFormat);
|
|
|
|
private:
|
|
// Channels configuration.
|
|
ChannelLayout mChannelLayout;
|
|
|
|
// Channel count.
|
|
uint32_t mChannels;
|
|
|
|
// Sample rate.
|
|
uint32_t mRate;
|
|
|
|
// Sample format.
|
|
SampleFormat mFormat;
|
|
|
|
bool mInterleaved;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // AudioLayout_h
|