mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-08 19:04:45 +00:00
350 lines
12 KiB
C++
350 lines
12 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "AudioConfig.h"
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namespace mozilla {
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typedef AudioConfig::ChannelLayout ChannelLayout;
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/**
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* AudioConfig::ChannelLayout
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*/
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/*
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SMPTE channel layout (also known as wave order)
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DUAL-MONO L R
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DUAL-MONO-LFE L R LFE
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MONO M
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MONO-LFE M LFE
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STEREO L R
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STEREO-LFE L R LFE
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3F L R C
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3F-LFE L R C LFE
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2F1 L R S
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2F1-LFE L R LFE S
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3F1 L R C S
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3F1-LFE L R C LFE S
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2F2 L R LS RS
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2F2-LFE L R LFE LS RS
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3F2 L R C LS RS
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3F2-LFE L R C LFE LS RS
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3F3R-LFE L R C LFE BC LS RS
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3F4-LFE L R C LFE Rls Rrs LS RS
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*/
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ChannelLayout ChannelLayout::LMONO{ CHANNEL_FRONT_CENTER };
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ChannelLayout ChannelLayout::LMONO_LFE{ CHANNEL_FRONT_CENTER, CHANNEL_LFE };
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ChannelLayout ChannelLayout::LSTEREO{ CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT };
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ChannelLayout ChannelLayout::LSTEREO_LFE{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_LFE };
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ChannelLayout ChannelLayout::L3F{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_FRONT_CENTER };
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ChannelLayout ChannelLayout::L3F_LFE{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_FRONT_CENTER,
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CHANNEL_LFE };
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ChannelLayout ChannelLayout::L2F1{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_BACK_CENTER };
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ChannelLayout ChannelLayout::L2F1_LFE{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_LFE,
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CHANNEL_BACK_CENTER };
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ChannelLayout ChannelLayout::L3F1{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_FRONT_CENTER,
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CHANNEL_BACK_CENTER };
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ChannelLayout ChannelLayout::LSURROUND = ChannelLayout::L3F1;
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ChannelLayout ChannelLayout::L3F1_LFE{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_FRONT_CENTER,
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CHANNEL_LFE,
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CHANNEL_BACK_CENTER };
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ChannelLayout ChannelLayout::L2F2{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_SIDE_LEFT,
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CHANNEL_SIDE_RIGHT };
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ChannelLayout ChannelLayout::L2F2_LFE{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_LFE,
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CHANNEL_SIDE_LEFT,
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CHANNEL_SIDE_RIGHT };
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ChannelLayout ChannelLayout::LQUAD{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_BACK_LEFT,
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CHANNEL_BACK_RIGHT };
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ChannelLayout ChannelLayout::LQUAD_LFE{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_LFE,
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CHANNEL_BACK_LEFT,
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CHANNEL_BACK_RIGHT };
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ChannelLayout ChannelLayout::L3F2{ CHANNEL_FRONT_LEFT,
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CHANNEL_FRONT_RIGHT,
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CHANNEL_FRONT_CENTER,
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CHANNEL_SIDE_LEFT,
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CHANNEL_SIDE_RIGHT };
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ChannelLayout ChannelLayout::L3F2_LFE{
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CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER,
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CHANNEL_LFE, CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT
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};
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ChannelLayout ChannelLayout::L5POINT1_SURROUND = ChannelLayout::L3F2_LFE;
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ChannelLayout ChannelLayout::L3F3R_LFE{
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CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER, CHANNEL_LFE,
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CHANNEL_BACK_CENTER, CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT
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};
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ChannelLayout ChannelLayout::L3F4_LFE{
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CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER,
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CHANNEL_LFE, CHANNEL_BACK_LEFT, CHANNEL_BACK_RIGHT,
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CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT
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};
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ChannelLayout ChannelLayout::L7POINT1_SURROUND = ChannelLayout::L3F4_LFE;
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void
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AudioConfig::ChannelLayout::UpdateChannelMap()
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{
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mValid = mChannels.Length() <= MAX_AUDIO_CHANNELS;
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mChannelMap = 0;
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if (mValid) {
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mChannelMap = Map();
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mValid = mChannelMap > 0;
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}
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}
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auto
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AudioConfig::ChannelLayout::Map() const -> ChannelMap
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{
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if (mChannelMap) {
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return mChannelMap;
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}
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ChannelMap map = UNKNOWN_MAP;
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for (size_t i = 0; i < mChannels.Length() && i <= MAX_AUDIO_CHANNELS; i++) {
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uint32_t mask = 1 << mChannels[i];
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if (mChannels[i] == CHANNEL_INVALID || (mChannelMap & mask)) {
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// Invalid configuration.
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return 0;
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}
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map |= mask;
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}
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return map;
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}
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const AudioConfig::Channel*
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AudioConfig::ChannelLayout::DefaultLayoutForChannels(uint32_t aChannels) const
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{
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switch (aChannels) {
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case 1: // MONO
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{
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static const Channel config[] = { CHANNEL_FRONT_CENTER };
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return config;
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}
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case 2: // STEREO
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{
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static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT };
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return config;
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}
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case 3: // 3F
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{
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static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER };
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return config;
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}
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case 4: // QUAD
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{
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static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_BACK_LEFT, CHANNEL_BACK_RIGHT };
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return config;
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}
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case 5: // 3F2
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{
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static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER, CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT };
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return config;
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}
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case 6: // 3F2-LFE
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{
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static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER, CHANNEL_LFE, CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT };
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return config;
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}
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case 7: // 3F3R-LFE
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{
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static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER, CHANNEL_LFE, CHANNEL_BACK_CENTER, CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT };
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return config;
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}
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case 8: // 3F4-LFE
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{
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static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER, CHANNEL_LFE, CHANNEL_BACK_LEFT, CHANNEL_BACK_RIGHT, CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT };
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return config;
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}
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default:
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return nullptr;
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}
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}
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/* static */ AudioConfig::ChannelLayout
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AudioConfig::ChannelLayout::SMPTEDefault(
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const ChannelLayout& aChannelLayout)
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{
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if (!aChannelLayout.IsValid()) {
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return aChannelLayout;
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}
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return SMPTEDefault(aChannelLayout.Map());
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}
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/* static */ ChannelLayout
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AudioConfig::ChannelLayout::SMPTEDefault(ChannelMap aMap)
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{
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MOZ_ASSERT(LMONO_MAP == LMONO.Map());
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MOZ_ASSERT(LMONO_LFE_MAP == LMONO_LFE.Map());
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MOZ_ASSERT(LSTEREO_MAP == LSTEREO.Map());
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MOZ_ASSERT(LSTEREO_LFE_MAP == LSTEREO_LFE.Map());
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MOZ_ASSERT(L3F_MAP == L3F.Map());
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MOZ_ASSERT(L3F_LFE_MAP == L3F_LFE.Map());
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MOZ_ASSERT(L2F1_MAP == L2F1.Map());
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MOZ_ASSERT(L2F1_LFE_MAP == L2F1_LFE.Map());
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MOZ_ASSERT(L3F1_MAP == L3F1.Map());
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MOZ_ASSERT(L3F1_LFE_MAP == L3F1_LFE.Map());
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MOZ_ASSERT(L2F2_MAP == L2F2.Map());
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MOZ_ASSERT(L2F2_LFE_MAP == L2F2_LFE.Map());
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MOZ_ASSERT(LQUAD_MAP == LQUAD.Map());
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MOZ_ASSERT(L3F2_MAP == L3F2.Map());
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MOZ_ASSERT(L3F2_LFE_MAP == L3F2_LFE.Map());
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MOZ_ASSERT(L3F3R_LFE_MAP == L3F3R_LFE.Map());
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MOZ_ASSERT(L3F4_LFE_MAP == L3F4_LFE.Map());
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// First handle the most common cases.
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switch (aMap) {
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case LMONO_MAP: return LMONO;
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case LMONO_LFE_MAP: return LMONO_LFE;
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case LSTEREO_MAP: return LSTEREO;
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case LSTEREO_LFE_MAP : return LSTEREO_LFE;
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case L3F_MAP: return L3F;
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case L3F_LFE_MAP: return L3F_LFE;
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case L2F1_MAP: return L2F1;
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case L2F1_LFE_MAP: return L2F1_LFE;
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case L3F1_MAP: return L3F1;
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case L3F1_LFE_MAP: return L3F1_LFE;
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case L2F2_MAP: return L2F2;
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case L2F2_LFE_MAP: return L2F2_LFE;
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case LQUAD_MAP: return LQUAD;
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case L3F2_MAP: return L3F2;
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case L3F2_LFE_MAP: return L3F2_LFE;
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case L3F3R_LFE_MAP: return L3F3R_LFE;
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case L3F4_LFE_MAP: return L3F4_LFE;
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default:
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break;
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}
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AutoTArray<Channel, MAX_AUDIO_CHANNELS> layout;
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uint32_t channels = 0;
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uint32_t i = 1;
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while (aMap) {
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if (aMap & 1) {
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layout.AppendElement(static_cast<Channel>(i));
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channels++;
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if (channels > MAX_AUDIO_CHANNELS) {
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return ChannelLayout();
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}
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}
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aMap >>= 1;
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}
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return ChannelLayout(channels, layout.Elements());
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}
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bool
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AudioConfig::ChannelLayout::MappingTable(const ChannelLayout& aOther,
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uint8_t* aMap) const
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{
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if (!IsValid() || !aOther.IsValid() ||
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Map() != aOther.Map()) {
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return false;
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}
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if (!aMap) {
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return true;
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}
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for (uint32_t i = 0; i < Count(); i++) {
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for (uint32_t j = 0; j < Count(); j++) {
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if (aOther[j] == mChannels[i]) {
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aMap[j] = i;
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break;
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}
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}
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}
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return true;
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}
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/**
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* AudioConfig::ChannelConfig
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*/
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/* static */ const char*
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AudioConfig::FormatToString(AudioConfig::SampleFormat aFormat)
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{
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switch (aFormat) {
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case FORMAT_U8: return "unsigned 8 bit";
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case FORMAT_S16: return "signed 16 bit";
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case FORMAT_S24: return "signed 24 bit MSB";
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case FORMAT_S24LSB: return "signed 24 bit LSB";
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case FORMAT_S32: return "signed 32 bit";
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case FORMAT_FLT: return "32 bit floating point";
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case FORMAT_NONE: return "none";
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default: return "unknown";
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}
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}
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/* static */ uint32_t
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AudioConfig::SampleSize(AudioConfig::SampleFormat aFormat)
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{
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switch (aFormat) {
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case FORMAT_U8: return 1;
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case FORMAT_S16: return 2;
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case FORMAT_S24: MOZ_FALLTHROUGH;
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case FORMAT_S24LSB: MOZ_FALLTHROUGH;
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case FORMAT_S32: MOZ_FALLTHROUGH;
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case FORMAT_FLT: return 4;
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case FORMAT_NONE:
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default: return 0;
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}
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}
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/* static */ uint32_t
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AudioConfig::FormatToBits(AudioConfig::SampleFormat aFormat)
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{
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switch (aFormat) {
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case FORMAT_U8: return 8;
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case FORMAT_S16: return 16;
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case FORMAT_S24LSB: MOZ_FALLTHROUGH;
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case FORMAT_S24: return 24;
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case FORMAT_S32: MOZ_FALLTHROUGH;
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case FORMAT_FLT: return 32;
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case FORMAT_NONE: MOZ_FALLTHROUGH;
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default: return 0;
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}
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}
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AudioConfig::AudioConfig(const ChannelLayout& aChannelLayout, uint32_t aRate,
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AudioConfig::SampleFormat aFormat, bool aInterleaved)
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: mChannelLayout(aChannelLayout)
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, mChannels(aChannelLayout.Count())
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, mRate(aRate)
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, mFormat(aFormat)
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, mInterleaved(aInterleaved)
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{
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}
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AudioConfig::AudioConfig(uint32_t aChannels,
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uint32_t aRate,
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AudioConfig::SampleFormat aFormat,
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bool aInterleaved)
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: mChannelLayout(aChannels)
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, mChannels(aChannels)
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, mRate(aRate)
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, mFormat(aFormat)
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, mInterleaved(aInterleaved)
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{
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||
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}
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||
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} // namespace mozilla
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