зеркало из https://github.com/mozilla/gecko-dev.git
307 строки
8.9 KiB
C++
307 строки
8.9 KiB
C++
/* -*- 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 "MediaMIMETypes.h"
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#include "nsContentTypeParser.h"
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#include "mozilla/dom/MediaCapabilitiesBinding.h"
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namespace mozilla {
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template <int N>
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static bool StartsWith(const nsACString& string, const char (&prefix)[N]) {
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if (N - 1 > string.Length()) {
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return false;
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}
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return memcmp(string.Data(), prefix, N - 1) == 0;
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}
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bool MediaMIMEType::HasApplicationMajorType() const {
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return StartsWith(mMIMEType, "application/");
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}
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bool MediaMIMEType::HasAudioMajorType() const {
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return StartsWith(mMIMEType, "audio/");
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}
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bool MediaMIMEType::HasVideoMajorType() const {
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return StartsWith(mMIMEType, "video/");
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}
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size_t MediaMIMEType::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
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return mMIMEType.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
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}
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MediaMIMEType::MediaMIMEType(const nsACString& aType) : mMIMEType(aType) {}
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Maybe<MediaMIMEType> MakeMediaMIMEType(const nsAString& aType) {
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nsContentTypeParser parser(aType);
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nsAutoString mime;
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nsresult rv = parser.GetType(mime);
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if (!NS_SUCCEEDED(rv) || mime.IsEmpty()) {
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return Nothing();
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}
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NS_ConvertUTF16toUTF8 mime8{mime};
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if (!IsMediaMIMEType(mime8)) {
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return Nothing();
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}
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return Some(MediaMIMEType(mime8));
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}
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Maybe<MediaMIMEType> MakeMediaMIMEType(const nsACString& aType) {
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return MakeMediaMIMEType(NS_ConvertUTF8toUTF16(aType));
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}
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Maybe<MediaMIMEType> MakeMediaMIMEType(const char* aType) {
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if (!aType) {
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return Nothing();
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}
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return MakeMediaMIMEType(nsDependentCString(aType));
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}
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bool MediaCodecs::Contains(const nsAString& aCodec) const {
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for (const auto& myCodec : Range()) {
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if (myCodec == aCodec) {
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return true;
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}
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}
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return false;
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}
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bool MediaCodecs::ContainsAll(const MediaCodecs& aCodecs) const {
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const auto& codecsToTest = aCodecs.Range();
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for (const auto& codecToTest : codecsToTest) {
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if (!Contains(codecToTest)) {
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return false;
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}
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}
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return true;
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}
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bool MediaCodecs::ContainsPrefix(const nsAString& aCodecPrefix) const {
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const size_t prefixLength = aCodecPrefix.Length();
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for (const auto& myCodec : Range()) {
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if (myCodec.Length() >= prefixLength &&
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memcmp(myCodec.Data(), aCodecPrefix.Data(),
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prefixLength * sizeof(char16_t)) == 0) {
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return true;
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}
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}
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return false;
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}
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size_t MediaCodecs::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
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return mCodecs.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
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}
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static int32_t GetParameterAsNumber(const nsContentTypeParser& aParser,
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const char* aParameter,
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const int32_t aErrorReturn) {
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nsAutoString parameterString;
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nsresult rv = aParser.GetParameter(aParameter, parameterString);
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if (NS_FAILED_impl(rv)) {
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return aErrorReturn;
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}
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int32_t number = parameterString.ToInteger(&rv);
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if (MOZ_UNLIKELY(NS_FAILED_impl(rv))) {
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return aErrorReturn;
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}
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return number;
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}
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MediaExtendedMIMEType::MediaExtendedMIMEType(
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const nsACString& aOriginalString, const nsACString& aMIMEType,
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bool aHaveCodecs, const nsAString& aCodecs, int32_t aWidth, int32_t aHeight,
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double aFramerate, int32_t aBitrate)
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: mOriginalString(aOriginalString),
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mMIMEType(aMIMEType),
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mHaveCodecs(aHaveCodecs),
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mCodecs(aCodecs),
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mWidth(aWidth),
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mHeight(aHeight),
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mFramerate(aFramerate),
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mBitrate(aBitrate) {}
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MediaExtendedMIMEType::MediaExtendedMIMEType(
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const nsACString& aOriginalString, const nsACString& aMIMEType,
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bool aHaveCodecs, const nsAString& aCodecs, int32_t aChannels,
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int32_t aSamplerate, int32_t aBitrate)
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: mOriginalString(aOriginalString),
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mMIMEType(aMIMEType),
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mHaveCodecs(aHaveCodecs),
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mCodecs(aCodecs),
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mChannels(aChannels),
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mSamplerate(aSamplerate),
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mBitrate(aBitrate) {}
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MediaExtendedMIMEType::MediaExtendedMIMEType(const MediaMIMEType& aType)
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: mOriginalString(aType.AsString()), mMIMEType(aType) {}
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MediaExtendedMIMEType::MediaExtendedMIMEType(MediaMIMEType&& aType)
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: mOriginalString(aType.AsString()), mMIMEType(std::move(aType)) {}
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/* static */
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Maybe<double> MediaExtendedMIMEType::ComputeFractionalString(
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const nsAString& aFrac) {
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nsAutoString frac(aFrac);
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nsresult error;
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double result = frac.ToDouble(&error);
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if (NS_SUCCEEDED(error)) {
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if (result <= 0) {
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return Nothing();
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}
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return Some(result);
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}
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int32_t slashPos = frac.Find(u"/"_ns);
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if (slashPos == kNotFound) {
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return Nothing();
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}
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nsAutoString firstPart(Substring(frac, 0, slashPos - 1));
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double first = firstPart.ToDouble(&error);
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if (NS_FAILED(error)) {
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return Nothing();
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}
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nsAutoString secondPart(Substring(frac, slashPos + 1));
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double second = secondPart.ToDouble(&error);
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if (NS_FAILED(error) || second == 0) {
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return Nothing();
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}
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result = first / second;
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if (result <= 0) {
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return Nothing();
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}
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return Some(result);
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}
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Maybe<MediaExtendedMIMEType> MakeMediaExtendedMIMEType(const nsAString& aType) {
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nsContentTypeParser parser(aType);
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nsAutoString mime;
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nsresult rv = parser.GetType(mime);
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if (!NS_SUCCEEDED(rv) || mime.IsEmpty()) {
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return Nothing();
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}
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NS_ConvertUTF16toUTF8 mime8{mime};
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if (!IsMediaMIMEType(mime8)) {
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return Nothing();
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}
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nsAutoString codecs;
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rv = parser.GetParameter("codecs", codecs);
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bool haveCodecs = NS_SUCCEEDED(rv);
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int32_t width = GetParameterAsNumber(parser, "width", -1);
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int32_t height = GetParameterAsNumber(parser, "height", -1);
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double framerate = GetParameterAsNumber(parser, "framerate", -1);
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int32_t bitrate = GetParameterAsNumber(parser, "bitrate", -1);
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return Some(MediaExtendedMIMEType(NS_ConvertUTF16toUTF8(aType), mime8,
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haveCodecs, codecs, width, height,
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framerate, bitrate));
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}
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Maybe<MediaExtendedMIMEType> MakeMediaExtendedMIMEType(
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const dom::VideoConfiguration& aConfig) {
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if (aConfig.mContentType.IsEmpty()) {
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return Nothing();
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}
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nsContentTypeParser parser(aConfig.mContentType);
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nsAutoString mime;
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nsresult rv = parser.GetType(mime);
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if (!NS_SUCCEEDED(rv) || mime.IsEmpty()) {
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return Nothing();
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}
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NS_ConvertUTF16toUTF8 mime8{mime};
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if (!IsMediaMIMEType(mime8)) {
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return Nothing();
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}
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nsAutoString codecs;
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rv = parser.GetParameter("codecs", codecs);
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bool haveCodecs = NS_SUCCEEDED(rv);
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auto framerate =
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MediaExtendedMIMEType::ComputeFractionalString(aConfig.mFramerate);
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if (!framerate) {
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return Nothing();
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}
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return Some(MediaExtendedMIMEType(
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NS_ConvertUTF16toUTF8(aConfig.mContentType), mime8, haveCodecs, codecs,
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aConfig.mWidth, aConfig.mHeight, framerate.ref(), aConfig.mBitrate));
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}
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Maybe<MediaExtendedMIMEType> MakeMediaExtendedMIMEType(
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const dom::AudioConfiguration& aConfig) {
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if (aConfig.mContentType.IsEmpty()) {
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return Nothing();
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}
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nsContentTypeParser parser(aConfig.mContentType);
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nsAutoString mime;
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nsresult rv = parser.GetType(mime);
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if (!NS_SUCCEEDED(rv) || mime.IsEmpty()) {
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return Nothing();
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}
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NS_ConvertUTF16toUTF8 mime8{mime};
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if (!IsMediaMIMEType(mime8)) {
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return Nothing();
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}
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nsAutoString codecs;
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rv = parser.GetParameter("codecs", codecs);
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bool haveCodecs = NS_SUCCEEDED(rv);
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int32_t channels = 2; // use a stereo config if not known.
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if (aConfig.mChannels.WasPassed()) {
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// A channels string was passed. Make sure it is valid.
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nsresult error;
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double value = aConfig.mChannels.Value().ToDouble(&error);
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if (NS_FAILED(error)) {
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return Nothing();
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}
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// Value is a channel configuration such as 5.1. We want to treat this as 6.
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channels = value;
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double fp = value - channels;
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// round up as .1 and .2 aren't exactly expressible in binary.
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channels += (fp * 10) + .5;
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}
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return Some(MediaExtendedMIMEType(
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NS_ConvertUTF16toUTF8(aConfig.mContentType), mime8, haveCodecs, codecs,
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channels,
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aConfig.mSamplerate.WasPassed() ? aConfig.mSamplerate.Value() : 48000,
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aConfig.mBitrate.WasPassed() ? aConfig.mBitrate.Value() : 131072));
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}
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size_t MediaExtendedMIMEType::SizeOfExcludingThis(
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MallocSizeOf aMallocSizeOf) const {
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return mOriginalString.SizeOfExcludingThisIfUnshared(aMallocSizeOf) +
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mMIMEType.SizeOfExcludingThis(aMallocSizeOf) +
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mCodecs.SizeOfExcludingThis(aMallocSizeOf);
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}
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Maybe<MediaExtendedMIMEType> MakeMediaExtendedMIMEType(
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const nsACString& aType) {
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return MakeMediaExtendedMIMEType(NS_ConvertUTF8toUTF16(aType));
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}
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Maybe<MediaExtendedMIMEType> MakeMediaExtendedMIMEType(const char* aType) {
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if (!aType) {
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return Nothing();
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}
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return MakeMediaExtendedMIMEType(nsDependentCString(aType));
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}
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} // namespace mozilla
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