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Adding --allow_codec_switching (#726) 

To allow adaptive switching between different codecs.

Closes #542.
This commit is contained in:
sr90 2020-03-17 19:33:44 -07:00 committed by GitHub
parent 28537034e8
commit 55349aa4c8
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GPG Key ID: 4AEE18F83AFDEB23
23 changed files with 231 additions and 33 deletions
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5
docs/source/options/dash_options.rst
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@ -90,3 +90,8 @@ DASH options
Optional. Defaults to 0 if not specified. If it is set to 1, indicates the
stream is DASH only.
--allow_codec_switching
If enabled, allow adaptive switching between different codecs, if they have
the same language, media type (audio, video etc) and container type.

5
packager/app/mpd_flags.cc
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@ -59,3 +59,8 @@ DEFINE_bool(
"completely."
"Ignored if $Time$ is used in segment template, since $Time$ requires "
"accurate Segment Timeline.");
DEFINE_bool(allow_codec_switching,
false,
"If enabled, allow adaptive switching between different codecs, "
"if they have the same language, media type (audio, video etc) and "
"container type.");

1
packager/app/mpd_flags.h
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@ -21,5 +21,6 @@ DECLARE_double(suggested_presentation_delay);
DECLARE_string(utc_timings);
DECLARE_bool(generate_dash_if_iop_compliant_mpd);
DECLARE_bool(allow_approximate_segment_timeline);
DECLARE_bool(allow_codec_switching);
#endif // APP_MPD_FLAGS_H_

1
packager/app/packager_main.cc
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@ -460,6 +460,7 @@ base::Optional<PackagingParams> GetPackagingParams() {
FLAGS_generate_dash_if_iop_compliant_mpd;
mpd_params.allow_approximate_segment_timeline =
FLAGS_allow_approximate_segment_timeline;
mpd_params.allow_codec_switching = FLAGS_allow_codec_switching;
HlsParams& hls_params = packaging_params.hls_params;
if (!GetHlsPlaylistType(FLAGS_hls_playlist_type, &hls_params.playlist_type)) {

50
packager/app/test/packager_test.py
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@ -447,7 +447,8 @@ class PackagerAppTest(unittest.TestCase):
ad_cues=None,
default_language=None,
segment_duration=1.0,
use_fake_clock=True):
use_fake_clock=True,
allow_codec_switching=False):
flags = []
if not strip_parameter_set_nalus:
@ -528,6 +529,9 @@ class PackagerAppTest(unittest.TestCase):
if generate_static_live_mpd:
flags += ['--generate_static_live_mpd']
if allow_codec_switching:
flags += ['--allow_codec_switching']
if ad_cues:
flags += ['--ad_cues', ad_cues]
@ -1499,6 +1503,50 @@ class PackagerFunctionalTest(PackagerAppTest):
self._GetFlags(output_dash=True, generate_static_live_mpd=True))
self._CheckTestResults('live-static-profile-with-time-in-segment-name')
def testAllowCodecSwitching(self):
streams = [
self._GetStream('video', test_file='bear-640x360-hevc.mp4'),
self._GetStream('video', test_file='bear-640x360.mp4'),
self._GetStream('video', test_file='bear-1280x720.mp4'),
self._GetStream('audio', test_file='bear-640x360.mp4'),
]
self.assertPackageSuccess(streams,
self._GetFlags(output_dash=True,
allow_codec_switching=True))
# Mpd cannot be validated right now since we don't generate determinstic
# mpd with multiple inputs due to thread racing.
# TODO(b/73349711): Generate determinstic mpd or at least validate mpd
# schema.
# See also https://github.com/google/shaka-packager/issues/177.
self._CheckTestResults(
'audio-video-with-codec-switching',
diff_files_policy=DiffFilesPolicy(
allowed_diff_files=['output.mpd'], exact=False))
def testAllowCodecSwitchingWithEncryptionAndTrickplay(self):
streams = [
self._GetStream('video', test_file='bear-640x360-hevc.mp4'),
self._GetStream('video', test_file='bear-640x360.mp4'),
self._GetStream('video', test_file='bear-1280x720.mp4'),
self._GetStream('video', test_file='bear-1280x720.mp4',
trick_play_factor=1),
self._GetStream('audio', test_file='bear-640x360.mp4'),
]
self.assertPackageSuccess(streams, self._GetFlags(output_dash=True,
allow_codec_switching=True,
encryption=True))
# Mpd cannot be validated right now since we don't generate determinstic
# mpd with multiple inputs due to thread racing.
# TODO(b/73349711): Generate determinstic mpd or at least validate mpd
# schema.
# See also https://github.com/google/shaka-packager/issues/177.
self._CheckTestResults(
'audio-video-with-codec-switching-encryption-trick-play',
diff_files_policy=DiffFilesPolicy(
allowed_diff_files=['output.mpd'], exact=False))
def testLiveProfileAndEncryption(self):
self.assertPackageSuccess(
self._GetStreams(['audio', 'video'], segmented=True),

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packager/app/test/testdata/audio-video-with-codec-switching-encryption-trick-play/output.mpd vendored Normal file
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@ -0,0 +1,66 @@
<?xml version="1.0" encoding="UTF-8"?>
<!--Generated with https://github.com/google/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" xmlns:cenc="urn:mpeg:cenc:2013" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.802799940109253S">
<Period id="0">
<AdaptationSet id="0" contentType="video" width="640" height="360" frameRate="30000/1001" subsegmentAlignment="true" par="16:9">
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b">
<cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAExMjM0NTY3ODkwMTIzNDU2AAAAAA==</cenc:pssh>
</ContentProtection>
<SupplementalProperty schemeIdUri="urn:mpeg:dash:adaptation-set-switching:2016" value="1"/>
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
<Representation id="0" bandwidth="281671" codecs="hev1.1.6.L63.90" mimeType="video/mp4" sar="1:1">
<BaseURL>bear-640x360-hevc-video.mp4</BaseURL>
<SegmentBase indexRange="3211-3278" timescale="30000">
<Initialization range="0-3210"/>
</SegmentBase>
</Representation>
</AdaptationSet>
<AdaptationSet id="1" contentType="video" maxWidth="1280" maxHeight="720" frameRate="30000/1001" subsegmentAlignment="true" par="16:9">
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b">
<cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAExMjM0NTY3ODkwMTIzNDU2AAAAAA==</cenc:pssh>
</ContentProtection>
<SupplementalProperty schemeIdUri="urn:mpeg:dash:adaptation-set-switching:2016" value="0"/>
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
<Representation id="1" bandwidth="977743" codecs="avc1.64001e" mimeType="video/mp4" sar="1:1" width="640" height="360">
<BaseURL>bear-640x360-video.mp4</BaseURL>
<SegmentBase indexRange="1127-1194" timescale="30000">
<Initialization range="0-1126"/>
</SegmentBase>
</Representation>
<Representation id="2" bandwidth="2631545" codecs="avc1.64001f" mimeType="video/mp4" sar="1:1" width="1280" height="720">
<BaseURL>bear-1280x720-video.mp4</BaseURL>
<SegmentBase indexRange="1125-1192" timescale="30000">
<Initialization range="0-1124"/>
</SegmentBase>
</Representation>
</AdaptationSet>
<AdaptationSet id="2" contentType="audio" subsegmentAlignment="true">
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b">
<cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAExMjM0NTY3ODkwMTIzNDU2AAAAAA==</cenc:pssh>
</ContentProtection>
<Representation id="3" bandwidth="133663" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-audio.mp4</BaseURL>
<SegmentBase indexRange="1003-1070" timescale="44100">
<Initialization range="0-1002"/>
</SegmentBase>
</Representation>
</AdaptationSet>
<AdaptationSet id="3" contentType="video" width="1280" height="720" frameRate="30000/30030" subsegmentAlignment="true" par="16:9">
<ContentProtection value="cenc" schemeIdUri="urn:mpeg:dash:mp4protection:2011" cenc:default_KID="31323334-3536-3738-3930-313233343536"/>
<ContentProtection schemeIdUri="urn:uuid:1077efec-c0b2-4d02-ace3-3c1e52e2fb4b">
<cenc:pssh>AAAANHBzc2gBAAAAEHfv7MCyTQKs4zweUuL7SwAAAAExMjM0NTY3ODkwMTIzNDU2AAAAAA==</cenc:pssh>
</ContentProtection>
<EssentialProperty schemeIdUri="http://dashif.org/guidelines/trickmode" value="1"/>
<Representation id="4" bandwidth="470530" codecs="avc1.64001f" mimeType="video/mp4" sar="1:1" maxPlayoutRate="30" codingDependency="false">
<BaseURL>bear-1280x720-video-trick_play_factor_1.mp4</BaseURL>
<SegmentBase indexRange="1125-1192" timescale="30000">
<Initialization range="0-1124"/>
</SegmentBase>
</Representation>
</AdaptationSet>
</Period>
</MPD>

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41
packager/app/test/testdata/audio-video-with-codec-switching/output.mpd vendored Normal file
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@ -0,0 +1,41 @@
<?xml version="1.0" encoding="UTF-8"?>
<!--Generated with https://github.com/google/shaka-packager version <tag>-<hash>-<test>-->
<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.802799940109253S">
<Period id="0">
<AdaptationSet id="0" contentType="video" width="640" height="360" frameRate="30000/1001" subsegmentAlignment="true" par="16:9">
<SupplementalProperty schemeIdUri="urn:mpeg:dash:adaptation-set-switching:2016" value="1"/>
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
<Representation id="0" bandwidth="277411" codecs="hev1.1.6.L63.90" mimeType="video/mp4" sar="1:1">
<BaseURL>bear-640x360-hevc-video.mp4</BaseURL>
<SegmentBase indexRange="1899-1966" timescale="30000">
<Initialization range="0-1898"/>
</SegmentBase>
</Representation>
</AdaptationSet>
<AdaptationSet id="1" contentType="video" maxWidth="1280" maxHeight="720" frameRate="30000/1001" subsegmentAlignment="true" par="16:9">
<SupplementalProperty schemeIdUri="urn:mpeg:dash:adaptation-set-switching:2016" value="0"/>
<Role schemeIdUri="urn:mpeg:dash:role:2011" value="main"/>
<Representation id="1" bandwidth="2627285" codecs="avc1.64001f" mimeType="video/mp4" sar="1:1" width="1280" height="720">
<BaseURL>bear-1280x720-video.mp4</BaseURL>
<SegmentBase indexRange="858-925" timescale="30000">
<Initialization range="0-857"/>
</SegmentBase>
</Representation>
<Representation id="2" bandwidth="973483" codecs="avc1.64001e" mimeType="video/mp4" sar="1:1" width="640" height="360">
<BaseURL>bear-640x360-video.mp4</BaseURL>
<SegmentBase indexRange="859-926" timescale="30000">
<Initialization range="0-858"/>
</SegmentBase>
</Representation>
</AdaptationSet>
<AdaptationSet id="2" contentType="audio" subsegmentAlignment="true">
<Representation id="3" bandwidth="133334" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
<BaseURL>bear-640x360-audio.mp4</BaseURL>
<SegmentBase indexRange="793-860" timescale="44100">
<Initialization range="0-792"/>
</SegmentBase>
</Representation>
</AdaptationSet>
</Period>
</MPD>

10
packager/mpd/base/adaptation_set.h
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@ -176,6 +176,13 @@ class AdaptationSet {
/// @return true if it is a video AdaptationSet.
bool IsVideo() const;
/// @return codec.
const std::string& codec() const { return codec_; }
/// Set AdaptationSet@codec.
/// @param codec is the new codec to be set.
void set_codec(const std::string& codec) { codec_ = codec; };
protected:
/// @param language is the language of this AdaptationSet. Mainly relevant for
/// audio.
@ -269,6 +276,9 @@ class AdaptationSet {
// Determined by examining the MediaInfo passed to AddRepresentation().
std::string content_type_;
// Codec of AdaptationSet.
std::string codec_;
// This does not have to be a set, it could be a list or vector because all we
// really care is whether there is more than one entry.
// Contains one entry if all the Representations have the same picture aspect

1
packager/mpd/base/mock_mpd_builder.cc
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@ -21,6 +21,7 @@ MockPeriod::MockPeriod(uint32_t period_id, double start_time_in_seconds)
MockAdaptationSet::MockAdaptationSet()
: AdaptationSet(kEmptyLang, kDefaultMpdOptions, &sequence_counter_) {}
MockAdaptationSet::~MockAdaptationSet() {}
MockRepresentation::MockRepresentation(uint32_t representation_id)

5
packager/mpd/base/mpd_utils.cc
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@ -142,7 +142,8 @@ std::string GetBaseCodec(const MediaInfo& media_info) {
return codec;
}
std::string GetAdaptationSetKey(const MediaInfo& media_info) {
std::string GetAdaptationSetKey(const MediaInfo& media_info,
bool ignore_codec) {
std::string key;
if (media_info.has_video_info()) {
@ -157,8 +158,10 @@ std::string GetAdaptationSetKey(const MediaInfo& media_info) {
}
key.append(MediaInfo_ContainerType_Name(media_info.container_type()));
if (!ignore_codec) {
key.append(":");
key.append(GetBaseCodec(media_info));
}
key.append(":");
key.append(GetLanguage(media_info));

2
packager/mpd/base/mpd_utils.h
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@ -47,7 +47,7 @@ std::string GetCodecs(const MediaInfo& media_info);
std::string GetBaseCodec(const MediaInfo& media_info);
// Returns a key made from the characteristics that separate AdaptationSets.
std::string GetAdaptationSetKey(const MediaInfo& media_info);
std::string GetAdaptationSetKey(const MediaInfo& media_info, bool ignore_codec);
std::string SecondsToXmlDuration(double seconds);

50
packager/mpd/base/period.cc
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@ -79,28 +79,24 @@ AdaptationSet* Period::GetOrCreateAdaptationSet(
if (duration_seconds_ == 0)
duration_seconds_ = media_info.media_duration_seconds();
// AdaptationSets with the same key should only differ in ContentProtection,
// which also means that if |content_protection_in_adaptation_set| is false,
// there should be at most one entry in |adaptation_sets|.
const std::string key = GetAdaptationSetKey(media_info);
const std::string key = GetAdaptationSetKey(
media_info, mpd_options_.mpd_params.allow_codec_switching);
std::list<AdaptationSet*>& adaptation_sets = adaptation_set_list_map_[key];
if (content_protection_in_adaptation_set) {
for (AdaptationSet* adaptation_set : adaptation_sets) {
if (protected_adaptation_set_map_.Match(*adaptation_set, media_info))
if (protected_adaptation_set_map_.Match(
*adaptation_set, media_info, content_protection_in_adaptation_set))
return adaptation_set;
}
} else {
if (!adaptation_sets.empty()) {
DCHECK_EQ(adaptation_sets.size(), 1u);
return adaptation_sets.front();
}
}
// None of the adaptation sets match with the new content protection.
// Need a new one.
const std::string language = GetLanguage(media_info);
std::unique_ptr<AdaptationSet> new_adaptation_set =
NewAdaptationSet(language, mpd_options_, representation_counter_);
if (!SetNewAdaptationSetAttributes(language, media_info, adaptation_sets,
content_protection_in_adaptation_set,
new_adaptation_set.get())) {
return nullptr;
}
@ -109,7 +105,7 @@ AdaptationSet* Period::GetOrCreateAdaptationSet(
media_info.has_protected_content()) {
protected_adaptation_set_map_.Register(*new_adaptation_set, media_info);
AddContentProtectionElements(media_info, new_adaptation_set.get());
}
for (AdaptationSet* adaptation_set : adaptation_sets) {
if (protected_adaptation_set_map_.Switchable(*adaptation_set,
*new_adaptation_set)) {
@ -117,7 +113,7 @@ AdaptationSet* Period::GetOrCreateAdaptationSet(
new_adaptation_set->AddAdaptationSetSwitching(adaptation_set);
}
}
}
AdaptationSet* adaptation_set_ptr = new_adaptation_set.get();
adaptation_sets.push_back(adaptation_set_ptr);
adaptation_sets_.emplace_back(std::move(new_adaptation_set));
@ -176,6 +172,7 @@ bool Period::SetNewAdaptationSetAttributes(
const std::string& language,
const MediaInfo& media_info,
const std::list<AdaptationSet*>& adaptation_sets,
bool content_protection_in_adaptation_set,
AdaptationSet* new_adaptation_set) {
if (!media_info.dash_roles().empty()) {
for (const std::string& role_str : media_info.dash_roles()) {
@ -206,6 +203,8 @@ bool Period::SetNewAdaptationSetAttributes(
accessibility.substr(pos + 1));
}
new_adaptation_set->set_codec(GetBaseCodec(media_info));
if (media_info.has_video_info()) {
// Because 'language' is ignored for videos, |adaptation_sets| must have
// all the video AdaptationSets.
@ -218,7 +217,8 @@ bool Period::SetNewAdaptationSetAttributes(
if (media_info.video_info().has_playback_rate()) {
const AdaptationSet* trick_play_reference_adaptation_set =
FindOriginalAdaptationSetForTrickPlay(media_info);
FindOriginalAdaptationSetForTrickPlay(
media_info, content_protection_in_adaptation_set);
if (!trick_play_reference_adaptation_set) {
LOG(ERROR) << "Failed to find original AdaptationSet for trick play.";
return false;
@ -236,15 +236,19 @@ bool Period::SetNewAdaptationSetAttributes(
}
const AdaptationSet* Period::FindOriginalAdaptationSetForTrickPlay(
const MediaInfo& media_info) {
const MediaInfo& media_info,
bool content_protection_in_adaptation_set) {
MediaInfo media_info_no_trickplay = media_info;
media_info_no_trickplay.mutable_video_info()->clear_playback_rate();
std::string key = GetAdaptationSetKey(media_info_no_trickplay);
std::string key = GetAdaptationSetKey(
media_info_no_trickplay, mpd_options_.mpd_params.allow_codec_switching);
const std::list<AdaptationSet*>& adaptation_sets =
adaptation_set_list_map_[key];
for (AdaptationSet* adaptation_set : adaptation_sets) {
if (protected_adaptation_set_map_.Match(*adaptation_set, media_info)) {
if (protected_adaptation_set_map_.Match(
*adaptation_set, media_info,
content_protection_in_adaptation_set)) {
return adaptation_set;
}
}
@ -260,7 +264,14 @@ void Period::ProtectedAdaptationSetMap::Register(
bool Period::ProtectedAdaptationSetMap::Match(
const AdaptationSet& adaptation_set,
const MediaInfo& media_info) {
const MediaInfo& media_info,
bool content_protection_in_adaptation_set) {
if (adaptation_set.codec() != GetBaseCodec(media_info))
return false;
if (!content_protection_in_adaptation_set)
return true;
const auto protected_content_it =
protected_content_map_.find(&adaptation_set);
// If the AdaptationSet ID is not registered in the map, then it is clear
@ -269,6 +280,7 @@ bool Period::ProtectedAdaptationSetMap::Match(
return !media_info.has_protected_content();
if (!media_info.has_protected_content())
return false;
return ProtectedContentEq(protected_content_it->second,
media_info.protected_content());
}

6
packager/mpd/base/period.h
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@ -95,6 +95,7 @@ class Period {
const std::string& language,
const MediaInfo& media_info,
const std::list<AdaptationSet*>& adaptation_sets,
bool content_protection_in_adaptation_set,
AdaptationSet* new_adaptation_set);
// Gets the original AdaptationSet which the trick play video belongs to.
@ -102,7 +103,7 @@ class Period {
// the trick play AdaptationSet.
// Returns the original AdaptationSet if found, otherwise returns nullptr;
const AdaptationSet* FindOriginalAdaptationSetForTrickPlay(
const MediaInfo& media_info);
const MediaInfo& media_info, bool content_protection_in_adaptation_set);
const uint32_t id_;
const double start_time_in_seconds_;
@ -127,7 +128,8 @@ class Period {
// Check if the protected content associated with |adaptation_set| matches
// with the one in |media_info|.
bool Match(const AdaptationSet& adaptation_set,
const MediaInfo& media_info);
const MediaInfo& media_info,
bool content_protection_in_adaptation_set);
// Check if the two adaptation sets are switchable.
bool Switchable(const AdaptationSet& adaptation_set_a,
const AdaptationSet& adaptation_set_b);

3
packager/mpd/public/mpd_params.h
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@ -80,6 +80,9 @@ struct MpdParams {
/// SegmentTimeline if it is enabled. It will be populated from segment
/// duration specified in ChunkingParams if not specified.
double target_segment_duration = 0;
/// If enabled, allow switching between different codecs, if they have the
/// same language, media type (audio, video etc) and container type.
bool allow_codec_switching = false;
};
} // namespace shaka