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chromium / chromium / src / cdfbc720d88e1151d3684a7f12804d372ecbb138 / . / media / base / mime_util_internal.cc
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// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/base/mime_util_internal.h"
#include <map>
#include "base/command_line.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "media/base/media.h"
#include "media/base/media_client.h"
#include "media/base/media_switches.h"
#include "media/base/video_codecs.h"
#include "media/base/video_color_space.h"
#include "media/media_features.h"
#if defined(OS_ANDROID)
#include "base/android/build_info.h"
#include "media/base/android/media_codec_util.h"
#endif
namespace media {
namespace internal {
// Wrapped to avoid static initializer startup cost.
const std::map<std::string, MimeUtil::Codec>& GetStringToCodecMap() {
static const std::map<std::string, MimeUtil::Codec> kStringToCodecMap = {
// We only allow this for WAV so it isn't ambiguous.
{"1", MimeUtil::PCM},
// avc1/avc3.XXXXXX may be unambiguous; handled by ParseAVCCodecId().
// hev1/hvc1.XXXXXX may be unambiguous; handled by ParseHEVCCodecID().
// vp9, vp9.0, vp09.xx.xx.xx.xx.xx.xx.xx may be unambiguous; handled by
// ParseVp9CodecID().
{"mp3", MimeUtil::MP3},
// Following is the list of RFC 6381 compliant audio codec strings:
// mp4a.66 - MPEG-2 AAC MAIN
// mp4a.67 - MPEG-2 AAC LC
// mp4a.68 - MPEG-2 AAC SSR
// mp4a.69 - MPEG-2 extension to MPEG-1 (MP3)
// mp4a.6B - MPEG-1 audio (MP3)
// mp4a.40.2 - MPEG-4 AAC LC
// mp4a.40.02 - MPEG-4 AAC LC (leading 0 in aud-oti for compatibility)
// mp4a.40.5 - MPEG-4 HE-AAC v1 (AAC LC + SBR)
// mp4a.40.05 - MPEG-4 HE-AAC v1 (AAC LC + SBR) (leading 0 in aud-oti
// for compatibility)
// mp4a.40.29 - MPEG-4 HE-AAC v2 (AAC LC + SBR + PS)
{"mp4a.66", MimeUtil::MPEG2_AAC},
{"mp4a.67", MimeUtil::MPEG2_AAC},
{"mp4a.68", MimeUtil::MPEG2_AAC},
{"mp4a.69", MimeUtil::MP3},
{"mp4a.6B", MimeUtil::MP3},
{"mp4a.40.2", MimeUtil::MPEG4_AAC},
{"mp4a.40.02", MimeUtil::MPEG4_AAC},
{"mp4a.40.5", MimeUtil::MPEG4_AAC},
{"mp4a.40.05", MimeUtil::MPEG4_AAC},
{"mp4a.40.29", MimeUtil::MPEG4_AAC},
#if BUILDFLAG(ENABLE_AC3_EAC3_AUDIO_DEMUXING)
// TODO(servolk): Strictly speaking only mp4a.A5 and mp4a.A6 codec ids are
// valid according to RFC 6381 section 3.3, 3.4. Lower-case oti (mp4a.a5
// and mp4a.a6) should be rejected. But we used to allow those in older
// versions of Chromecast firmware and some apps (notably MPL) depend on
// those codec types being supported, so they should be allowed for now
// (crbug.com/564960).
{"ac-3", MimeUtil::AC3},
{"mp4a.a5", MimeUtil::AC3},
{"mp4a.A5", MimeUtil::AC3},
{"ec-3", MimeUtil::EAC3},
{"mp4a.a6", MimeUtil::EAC3},
{"mp4a.A6", MimeUtil::EAC3},
#endif
{"vorbis", MimeUtil::VORBIS},
{"opus", MimeUtil::OPUS},
{"flac", MimeUtil::FLAC},
{"vp8", MimeUtil::VP8},
{"vp8.0", MimeUtil::VP8},
{"theora", MimeUtil::THEORA}
};
return kStringToCodecMap;
}
static bool ParseVp9CodecID(const std::string& mime_type_lower_case,
const std::string& codec_id,
VideoCodecProfile* out_profile,
uint8_t* out_level,
VideoColorSpace* out_color_space) {
if (mime_type_lower_case == "video/mp4") {
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kEnableVp9InMp4)) {
// Only new style is allowed for mp4.
return ParseNewStyleVp9CodecID(codec_id, out_profile, out_level,
out_color_space);
}
} else if (mime_type_lower_case == "video/webm") {
if (HasNewVp9CodecStringSupport() &&
ParseNewStyleVp9CodecID(codec_id, out_profile, out_level,
out_color_space)) {
return true;
}
return ParseLegacyVp9CodecID(codec_id, out_profile, out_level);
}
return false;
}
static bool IsValidH264Level(uint8_t level_idc) {
// Valid levels taken from Table A-1 in ISO/IEC 14496-10.
// Level_idc represents the standard level represented as decimal number
// multiplied by ten, e.g. level_idc==32 corresponds to level==3.2
return ((level_idc >= 10 && level_idc <= 13) ||
(level_idc >= 20 && level_idc <= 22) ||
(level_idc >= 30 && level_idc <= 32) ||
(level_idc >= 40 && level_idc <= 42) ||
(level_idc >= 50 && level_idc <= 51));
}
MimeUtil::MimeUtil() : allow_proprietary_codecs_(false) {
#if defined(OS_ANDROID)
// When the unified media pipeline is enabled, we need support for both GPU
// video decoders and MediaCodec; indicated by HasPlatformDecoderSupport().
// When the Android pipeline is used, we only need access to MediaCodec.
platform_info_.has_platform_decoders = HasPlatformDecoderSupport();
platform_info_.has_platform_vp8_decoder =
MediaCodecUtil::IsVp8DecoderAvailable();
platform_info_.has_platform_vp9_decoder =
MediaCodecUtil::IsVp9DecoderAvailable();
platform_info_.supports_opus = PlatformHasOpusSupport();
#endif
InitializeMimeTypeMaps();
}
MimeUtil::~MimeUtil() {}
VideoCodec MimeUtilToVideoCodec(MimeUtil::Codec codec) {
switch (codec) {
case MimeUtil::H264:
return kCodecH264;
case MimeUtil::HEVC:
return kCodecHEVC;
case MimeUtil::VP8:
return kCodecVP8;
case MimeUtil::VP9:
return kCodecVP9;
case MimeUtil::THEORA:
return kCodecTheora;
case MimeUtil::DOLBY_VISION:
return kCodecDolbyVision;
default:
break;
}
return kUnknownVideoCodec;
}
SupportsType MimeUtil::AreSupportedCodecs(
const CodecSet& supported_codecs,
const std::vector<std::string>& codecs,
const std::string& mime_type_lower_case,
bool is_encrypted) const {
DCHECK(!supported_codecs.empty());
DCHECK(!codecs.empty());
DCHECK_EQ(base::ToLowerASCII(mime_type_lower_case), mime_type_lower_case);
SupportsType combined_result = IsSupported;
for (size_t i = 0; i < codecs.size(); ++i) {
// Parse the string.
bool ambiguous_codec_string = false;
Codec codec = INVALID_CODEC;
VideoCodecProfile video_profile = VIDEO_CODEC_PROFILE_UNKNOWN;
uint8_t video_level = 0;
VideoColorSpace color_space;
if (!ParseCodecString(mime_type_lower_case, codecs[i], &codec,
&ambiguous_codec_string, &video_profile, &video_level,
&color_space)) {
return IsNotSupported;
}
// Bail if codec not in supported list for given container.
if (supported_codecs.find(codec) == supported_codecs.end())
return IsNotSupported;
// Make conservative guesses to resolve ambiguity before checking platform
// support. H264 and VP9 are the only allowed ambiguous video codec. DO NOT
// ADD SUPPORT FOR MORE AMIBIGUOUS STRINGS.
if (codec == MimeUtil::H264 && ambiguous_codec_string) {
if (video_profile == VIDEO_CODEC_PROFILE_UNKNOWN)
video_profile = H264PROFILE_BASELINE;
if (!IsValidH264Level(video_level))
video_level = 10;
} else if (codec == MimeUtil::VP9 && video_level == 0) {
// Original VP9 content type (codecs="vp9") does not specify the level.
// TODO(chcunningham): Mark this string as ambiguous when new multi-part
// VP9 content type is published.
video_level = 10;
}
// Check platform support.
SupportsType result =
IsCodecSupported(mime_type_lower_case, codec, video_profile,
video_level, color_space, is_encrypted);
if (result == IsNotSupported)
return IsNotSupported;
// If any codec is "MayBeSupported", return Maybe for the combined result.
// Downgrade to MayBeSupported if we had to guess the meaning of one of the
// codec strings.
if (result == MayBeSupported ||
(result == IsSupported && ambiguous_codec_string))
combined_result = MayBeSupported;
}
return combined_result;
}
void MimeUtil::InitializeMimeTypeMaps() {
#if BUILDFLAG(USE_PROPRIETARY_CODECS)
allow_proprietary_codecs_ = true;
#endif
AddSupportedMediaFormats();
}
// Each call to AddContainerWithCodecs() contains a media type
// (https://en.wikipedia.org/wiki/Media_type) and corresponding media codec(s)
// supported by these types/containers.
// TODO(ddorwin): Replace insert() calls with initializer_list when allowed.
void MimeUtil::AddSupportedMediaFormats() {
CodecSet implicit_codec;
CodecSet wav_codecs;
wav_codecs.insert(PCM);
CodecSet ogg_audio_codecs;
ogg_audio_codecs.insert(FLAC);
ogg_audio_codecs.insert(OPUS);
ogg_audio_codecs.insert(VORBIS);
CodecSet ogg_video_codecs;
#if !defined(OS_ANDROID)
ogg_video_codecs.insert(THEORA);
#endif // !defined(OS_ANDROID)
CodecSet ogg_codecs(ogg_audio_codecs);
ogg_codecs.insert(ogg_video_codecs.begin(), ogg_video_codecs.end());
CodecSet webm_audio_codecs;
webm_audio_codecs.insert(OPUS);
webm_audio_codecs.insert(VORBIS);
CodecSet webm_video_codecs;
webm_video_codecs.insert(VP8);
webm_video_codecs.insert(VP9);
CodecSet webm_codecs(webm_audio_codecs);
webm_codecs.insert(webm_video_codecs.begin(), webm_video_codecs.end());
#if BUILDFLAG(USE_PROPRIETARY_CODECS)
CodecSet mp3_codecs;
mp3_codecs.insert(MP3);
CodecSet aac;
aac.insert(MPEG2_AAC);
aac.insert(MPEG4_AAC);
CodecSet avc_and_aac(aac);
avc_and_aac.insert(H264);
CodecSet mp4_audio_codecs(aac);
mp4_audio_codecs.insert(MP3);
#if BUILDFLAG(ENABLE_AC3_EAC3_AUDIO_DEMUXING)
mp4_audio_codecs.insert(AC3);
mp4_audio_codecs.insert(EAC3);
#endif // BUILDFLAG(ENABLE_AC3_EAC3_AUDIO_DEMUXING)
CodecSet mp4_video_codecs;
mp4_video_codecs.insert(H264);
#if BUILDFLAG(ENABLE_HEVC_DEMUXING)
mp4_video_codecs.insert(HEVC);
#endif // BUILDFLAG(ENABLE_HEVC_DEMUXING)
// Only VP9 with valid codec string vp09.xx.xx.xx.xx.xx.xx.xx is supported.
// See ParseVp9CodecID for details.
mp4_video_codecs.insert(VP9);
#if BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING)
mp4_video_codecs.insert(DOLBY_VISION);
#endif // BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING)
CodecSet mp4_codecs(mp4_audio_codecs);
mp4_codecs.insert(mp4_video_codecs.begin(), mp4_video_codecs.end());
#endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
AddContainerWithCodecs("audio/wav", wav_codecs, false);
AddContainerWithCodecs("audio/x-wav", wav_codecs, false);
AddContainerWithCodecs("audio/webm", webm_audio_codecs, false);
DCHECK(!webm_video_codecs.empty());
AddContainerWithCodecs("video/webm", webm_codecs, false);
AddContainerWithCodecs("audio/ogg", ogg_audio_codecs, false);
// video/ogg is only supported if an appropriate video codec is supported.
// Note: This assumes such codecs cannot be later excluded.
if (!ogg_video_codecs.empty())
AddContainerWithCodecs("video/ogg", ogg_codecs, false);
// TODO(ddorwin): Should the application type support Opus?
AddContainerWithCodecs("application/ogg", ogg_codecs, false);
AddContainerWithCodecs("audio/flac", implicit_codec, false);
#if BUILDFLAG(USE_PROPRIETARY_CODECS)
AddContainerWithCodecs("audio/mpeg", mp3_codecs, true); // Allow "mp3".
AddContainerWithCodecs("audio/mp3", implicit_codec, true);
AddContainerWithCodecs("audio/x-mp3", implicit_codec, true);
AddContainerWithCodecs("audio/aac", implicit_codec, true); // AAC / ADTS.
AddContainerWithCodecs("audio/mp4", mp4_audio_codecs, true);
DCHECK(!mp4_video_codecs.empty());
AddContainerWithCodecs("video/mp4", mp4_codecs, true);
// These strings are supported for backwards compatibility only and thus only
// support the codecs needed for compatibility.
AddContainerWithCodecs("audio/x-m4a", aac, true);
AddContainerWithCodecs("video/x-m4v", avc_and_aac, true);
#if BUILDFLAG(ENABLE_MSE_MPEG2TS_STREAM_PARSER)
// TODO(ddorwin): Exactly which codecs should be supported?
DCHECK(!mp4_video_codecs.empty());
AddContainerWithCodecs("video/mp2t", mp4_codecs, true);
#endif // BUILDFLAG(ENABLE_MSE_MPEG2TS_STREAM_PARSER)
#if defined(OS_ANDROID)
// HTTP Live Streaming (HLS).
// TODO(ddorwin): Is any MP3 codec string variant included in real queries?
CodecSet hls_codecs(avc_and_aac);
hls_codecs.insert(MP3);
AddContainerWithCodecs("application/x-mpegurl", hls_codecs, true);
AddContainerWithCodecs("application/vnd.apple.mpegurl", hls_codecs, true);
AddContainerWithCodecs("audio/mpegurl", hls_codecs, true);
// Not documented by Apple, but unfortunately used extensively by Apple and
// others for both audio-only and audio+video playlists. See
// https://crbug.com/675552 for details and examples.
AddContainerWithCodecs("audio/x-mpegurl", hls_codecs, true);
#endif // defined(OS_ANDROID)
#endif // BUILDFLAG(USE_PROPRIETARY_CODECS)
}
void MimeUtil::AddContainerWithCodecs(const std::string& mime_type,
const CodecSet& codecs,
bool is_proprietary_mime_type) {
#if !BUILDFLAG(USE_PROPRIETARY_CODECS)
DCHECK(!is_proprietary_mime_type);
#endif
media_format_map_[mime_type] = codecs;
if (is_proprietary_mime_type)
proprietary_media_containers_.push_back(mime_type);
}
bool MimeUtil::IsSupportedMediaMimeType(const std::string& mime_type) const {
return media_format_map_.find(base::ToLowerASCII(mime_type)) !=
media_format_map_.end();
}
void MimeUtil::SplitCodecsToVector(const std::string& codecs,
std::vector<std::string>* codecs_out,
bool strip) {
*codecs_out =
base::SplitString(base::TrimString(codecs, "\"", base::TRIM_ALL), ",",
base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
// Convert empty or all-whitespace input to 0 results.
if (codecs_out->size() == 1 && (*codecs_out)[0].empty())
codecs_out->clear();
if (!strip)
return;
// Strip everything past the first '.'
for (std::vector<std::string>::iterator it = codecs_out->begin();
it != codecs_out->end(); ++it) {
size_t found = it->find_first_of('.');
if (found != std::string::npos)
it->resize(found);
}
}
SupportsType MimeUtil::IsSupportedMediaFormat(
const std::string& mime_type,
const std::vector<std::string>& codecs,
bool is_encrypted) const {
const std::string mime_type_lower_case = base::ToLowerASCII(mime_type);
MediaFormatMappings::const_iterator it_media_format_map =
media_format_map_.find(mime_type_lower_case);
if (it_media_format_map == media_format_map_.end())
return IsNotSupported;
if (it_media_format_map->second.empty()) {
// We get here if the mimetype does not expect a codecs parameter.
if (codecs.empty()) {
return IsDefaultCodecSupported(mime_type_lower_case, is_encrypted);
} else {
return IsNotSupported;
}
}
if (codecs.empty()) {
// We get here if the mimetype expects to get a codecs parameter,
// but didn't get one. If |mime_type_lower_case| does not have a default
// codec the best we can do is say "maybe" because we don't have enough
// information.
Codec default_codec = INVALID_CODEC;
if (!GetDefaultCodec(mime_type_lower_case, &default_codec))
return MayBeSupported;
return IsSimpleCodecSupported(mime_type_lower_case, default_codec,
is_encrypted);
}
#if BUILDFLAG(ENABLE_MSE_MPEG2TS_STREAM_PARSER)
if (mime_type_lower_case == "video/mp2t") {
std::vector<std::string> codecs_to_check;
for (const auto& codec_id : codecs) {
codecs_to_check.push_back(TranslateLegacyAvc1CodecIds(codec_id));
}
return AreSupportedCodecs(it_media_format_map->second, codecs_to_check,
mime_type_lower_case, is_encrypted);
}
#endif
return AreSupportedCodecs(it_media_format_map->second, codecs,
mime_type_lower_case, is_encrypted);
}
void MimeUtil::RemoveProprietaryMediaTypesAndCodecs() {
for (const auto& container : proprietary_media_containers_)
media_format_map_.erase(container);
allow_proprietary_codecs_ = false;
}
// static
bool MimeUtil::IsCodecSupportedOnAndroid(
Codec codec,
const std::string& mime_type_lower_case,
bool is_encrypted,
const PlatformInfo& platform_info) {
DCHECK_NE(mime_type_lower_case, "");
// Encrypted block support is never available without platform decoders.
if (is_encrypted && !platform_info.has_platform_decoders)
return false;
// NOTE: We do not account for Media Source Extensions (MSE) within these
// checks since it has its own isTypeSupported() which will handle platform
// specific codec rejections. See http://crbug.com/587303.
switch (codec) {
// ----------------------------------------------------------------------
// The following codecs are never supported.
// ----------------------------------------------------------------------
case INVALID_CODEC:
case AC3:
case EAC3:
case THEORA:
return false;
// ----------------------------------------------------------------------
// The remaining codecs may be supported depending on platform abilities.
// ----------------------------------------------------------------------
case PCM:
case MP3:
case MPEG4_AAC:
case FLAC:
case VORBIS:
// These codecs are always supported; via a platform decoder (when used
// with MSE/EME), a software decoder (the unified pipeline), or with
// MediaPlayer.
DCHECK(!is_encrypted || platform_info.has_platform_decoders);
return true;
case MPEG2_AAC:
// MPEG-2 variants of AAC are not supported on Android unless the unified
// media pipeline can be used and the container is not HLS. These codecs
// will be decoded in software. See https://crbug.com/544268 for details.
if (base::EndsWith(mime_type_lower_case, "mpegurl",
base::CompareCase::SENSITIVE)) {
return false;
}
return !is_encrypted;
case OPUS:
// If clear, the unified pipeline can always decode Opus in software.
if (!is_encrypted)
return true;
// Otherwise, platform support is required.
if (!platform_info.supports_opus)
return false;
// MediaPlayer does not support Opus in ogg containers.
if (base::EndsWith(mime_type_lower_case, "ogg",
base::CompareCase::SENSITIVE)) {
return false;
}
DCHECK(!is_encrypted || platform_info.has_platform_decoders);
return true;
case H264:
// When content is not encrypted we fall back to MediaPlayer, thus we
// always support H264. For EME we need MediaCodec.
return !is_encrypted || platform_info.has_platform_decoders;
case HEVC:
#if BUILDFLAG(ENABLE_HEVC_DEMUXING)
if (!platform_info.has_platform_decoders)
return false;
#if defined(OS_ANDROID)
// HEVC/H.265 is supported in Lollipop+ (API Level 21), according to
// http://developer.android.com/reference/android/media/MediaFormat.html
return base::android::BuildInfo::GetInstance()->sdk_int() >= 21;
#else
return true;
#endif // defined(OS_ANDROID)
#else
return false;
#endif // BUILDFLAG(ENABLE_HEVC_DEMUXING)
case VP8:
// If clear, the unified pipeline can always decode VP8 in software.
if (!is_encrypted)
return true;
if (is_encrypted)
return platform_info.has_platform_vp8_decoder;
// MediaPlayer can always play VP8. Note: This is incorrect for MSE, but
// MSE does not use this code. http://crbug.com/587303.
return true;
case VP9: {
if (base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kReportVp9AsAnUnsupportedMimeType)) {
return false;
}
// If clear, the unified pipeline can always decode VP9 in software.
if (!is_encrypted)
return true;
if (!platform_info.has_platform_vp9_decoder)
return false;
// Encrypted content is demuxed so the container is irrelevant.
if (is_encrypted)
return true;
// MediaPlayer only supports VP9 in WebM.
return mime_type_lower_case == "video/webm";
}
case DOLBY_VISION:
// This function is only called on Android which doesn't support Dolby
// Vision.
return false;
}
return false;
}
bool MimeUtil::ParseCodecString(const std::string& mime_type_lower_case,
const std::string& codec_id,
Codec* codec,
bool* ambiguous_codec_string,
VideoCodecProfile* out_profile,
uint8_t* out_level,
VideoColorSpace* out_color_space) const {
DCHECK_EQ(base::ToLowerASCII(mime_type_lower_case), mime_type_lower_case);
DCHECK(codec);
DCHECK(out_profile);
DCHECK(out_level);
*codec = INVALID_CODEC;
*ambiguous_codec_string = false;
*out_profile = VIDEO_CODEC_PROFILE_UNKNOWN;
*out_level = 0;
// Most codec strings do not yet specify color. We choose 709 as default color
// space elsewhere, so defaulting to 709 here as well. See here for context:
// https://crrev.com/1221903003/
*out_color_space = VideoColorSpace::BT709();
std::map<std::string, Codec>::const_iterator itr =
GetStringToCodecMap().find(codec_id);
if (itr != GetStringToCodecMap().end()) {
*codec = itr->second;
return true;
}
// Check codec string against short list of allowed ambiguous codecs.
// Hard-coded to discourage expansion. DO NOT ADD TO THIS LIST. DO NOT
// INCREASE PLACES WHERE |ambiguous_codec_string| = true.
// NOTE: avc1/avc3.XXXXXX may be ambiguous handled after ParseAVCCodecId().
if (codec_id == "avc1" || codec_id == "avc3") {
*codec = MimeUtil::H264;
*ambiguous_codec_string = true;
return true;
} else if (codec_id == "mp4a.40") {
*codec = MimeUtil::MPEG4_AAC;
*ambiguous_codec_string = true;
return true;
}
// If |codec_id| is not in |kStringToCodecMap|, then we assume that it is
// either VP9, H.264 or HEVC/H.265 codec ID because currently those are the
// only ones that are not added to the |kStringToCodecMap| and require
// parsing.
if (ParseVp9CodecID(mime_type_lower_case, codec_id, out_profile, out_level,
out_color_space)) {
*codec = MimeUtil::VP9;
return true;
}
if (ParseAVCCodecId(codec_id, out_profile, out_level)) {
*codec = MimeUtil::H264;
// Allowed string ambiguity since 2014. DO NOT ADD NEW CASES FOR AMBIGUITY.
*ambiguous_codec_string = !IsValidH264Level(*out_level);
return true;
}
#if BUILDFLAG(ENABLE_HEVC_DEMUXING)
if (ParseHEVCCodecId(codec_id, out_profile, out_level)) {
*codec = MimeUtil::HEVC;
return true;
}
#endif
#if BUILDFLAG(ENABLE_DOLBY_VISION_DEMUXING)
if (ParseDolbyVisionCodecId(codec_id, out_profile, out_level)) {
*codec = MimeUtil::DOLBY_VISION;
return true;
}
#endif
DVLOG(2) << __func__ << ": Unrecognized codec id " << codec_id;
return false;
}
SupportsType MimeUtil::IsSimpleCodecSupported(
const std::string& mime_type_lower_case,
Codec codec,
bool is_encrypted) const {
// Video codecs are not "simple" because they require a profile and level to
// be specified. There is no "default" video codec for a given container.
DCHECK_EQ(MimeUtilToVideoCodec(codec), kUnknownVideoCodec);
SupportsType result = IsCodecSupported(
mime_type_lower_case, codec, VIDEO_CODEC_PROFILE_UNKNOWN,
0 /* video_level */, VideoColorSpace::BT709(), is_encrypted);
// Platform support should never be ambiguous for simple codecs (no range of
// profiles to consider).
DCHECK_NE(result, MayBeSupported);
return result;
}
SupportsType MimeUtil::IsCodecSupported(const std::string& mime_type_lower_case,
Codec codec,
VideoCodecProfile video_profile,
uint8_t video_level,
const VideoColorSpace& color_space,
bool is_encrypted) const {
DCHECK_EQ(base::ToLowerASCII(mime_type_lower_case), mime_type_lower_case);
DCHECK_NE(codec, INVALID_CODEC);
VideoCodec video_codec = MimeUtilToVideoCodec(codec);
if (video_codec != kUnknownVideoCodec &&
// Theora and VP8 do not have profiles/levels.
video_codec != kCodecTheora && video_codec != kCodecVP8) {
DCHECK_NE(video_profile, VIDEO_CODEC_PROFILE_UNKNOWN);
DCHECK_GT(video_level, 0);
}
// Bail early for disabled proprietary codecs
if (!allow_proprietary_codecs_ && IsCodecProprietary(codec)) {
return IsNotSupported;
}
// Check for cases of ambiguous platform support.
// TODO(chcunningham): DELETE THIS. Platform should know its capabilities.
// Answer should come from MediaClient.
bool ambiguous_platform_support = false;
if (codec == MimeUtil::H264) {
switch (video_profile) {
// Always supported
case H264PROFILE_BASELINE:
case H264PROFILE_MAIN:
case H264PROFILE_HIGH:
break;
// HIGH10PROFILE is supported through fallback to the ffmpeg decoder
// which is not available on Android, or if FFMPEG is not used.
#if !defined(MEDIA_DISABLE_FFMPEG) && !defined(OS_ANDROID)
case H264PROFILE_HIGH10PROFILE:
// FFmpeg is not generally used for encrypted videos, so we do not
// know whether 10-bit is supported.
ambiguous_platform_support = is_encrypted;
break;
#endif
default:
ambiguous_platform_support = true;
}
} else if (codec == MimeUtil::VP9 && video_profile != VP9PROFILE_PROFILE0) {
// We don't know if the underlying platform supports these profiles. Need
// to add platform level querying to get supported profiles.
// https://crbug.com/604566
ambiguous_platform_support = true;
}
if (GetMediaClient() && video_codec != kUnknownVideoCodec &&
!GetMediaClient()->IsSupportedVideoConfig(
{video_codec, video_profile, video_level, color_space})) {
return IsNotSupported;
}
#if defined(OS_ANDROID)
// TODO(chcunningham): Delete this. Android platform support should be
// handled by (android specific) MediaClient.
if (!IsCodecSupportedOnAndroid(codec, mime_type_lower_case, is_encrypted,
platform_info_)) {
return IsNotSupported;
}
#endif
return ambiguous_platform_support ? MayBeSupported : IsSupported;
}
bool MimeUtil::IsCodecProprietary(Codec codec) const {
switch (codec) {
case INVALID_CODEC:
case AC3:
case EAC3:
case MP3:
case MPEG2_AAC:
case MPEG4_AAC:
case H264:
case HEVC:
case DOLBY_VISION:
return true;
case PCM:
case VORBIS:
case OPUS:
case FLAC:
case VP8:
case VP9:
case THEORA:
return false;
}
return true;
}
bool MimeUtil::GetDefaultCodec(const std::string& mime_type,
Codec* default_codec) const {
if (mime_type == "audio/mpeg" || mime_type == "audio/mp3" ||
mime_type == "audio/x-mp3") {
*default_codec = MimeUtil::MP3;
return true;
}
if (mime_type == "audio/aac") {
*default_codec = MimeUtil::MPEG4_AAC;
return true;
}
if (mime_type == "audio/flac") {
*default_codec = MimeUtil::FLAC;
return true;
}
return false;
}
SupportsType MimeUtil::IsDefaultCodecSupported(const std::string& mime_type,
bool is_encrypted) const {
Codec default_codec = Codec::INVALID_CODEC;
if (!GetDefaultCodec(mime_type, &default_codec))
return IsNotSupported;
return IsSimpleCodecSupported(mime_type, default_codec, is_encrypted);
}
} // namespace internal
} // namespace media