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shaka-packager/packager/packager.cc

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// Copyright 2017 Google Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#include "packager/packager.h"
#include "packager/app/libcrypto_threading.h"
#include "packager/app/packager_util.h"
#include "packager/app/stream_descriptor.h"
#include "packager/base/at_exit.h"
#include "packager/base/files/file_path.h"
#include "packager/base/logging.h"
#include "packager/base/path_service.h"
#include "packager/base/strings/stringprintf.h"
#include "packager/base/threading/simple_thread.h"
#include "packager/base/time/clock.h"
#include "packager/file/file.h"
#include "packager/hls/base/hls_notifier.h"
#include "packager/hls/base/simple_hls_notifier.h"
#include "packager/media/base/container_names.h"
#include "packager/media/base/fourccs.h"
#include "packager/media/base/key_source.h"
#include "packager/media/base/muxer_options.h"
#include "packager/media/base/muxer_util.h"
#include "packager/media/chunking/chunking_handler.h"
#include "packager/media/crypto/encryption_handler.h"
#include "packager/media/demuxer/demuxer.h"
#include "packager/media/event/hls_notify_muxer_listener.h"
#include "packager/media/event/mpd_notify_muxer_listener.h"
#include "packager/media/event/vod_media_info_dump_muxer_listener.h"
#include "packager/media/formats/mp2t/ts_muxer.h"
#include "packager/media/formats/mp4/mp4_muxer.h"
#include "packager/media/formats/webm/webm_muxer.h"
#include "packager/media/trick_play/trick_play_handler.h"
#include "packager/mpd/base/dash_iop_mpd_notifier.h"
#include "packager/mpd/base/media_info.pb.h"
#include "packager/mpd/base/mpd_builder.h"
#include "packager/mpd/base/simple_mpd_notifier.h"
#include "packager/version/version.h"
namespace shaka {
// TODO(kqyang): Clean up namespaces.
using media::ChunkingOptions;
using media::Demuxer;
using media::EncryptionOptions;
using media::KeySource;
using media::MuxerOptions;
namespace media {
namespace {
const char kMediaInfoSuffix[] = ".media_info";
// TODO(rkuroiwa): Write TTML and WebVTT parser (demuxing) for a better check
// and for supporting live/segmenting (muxing). With a demuxer and a muxer,
// CreateRemuxJobs() shouldn't treat text as a special case.
std::string DetermineTextFileFormat(const std::string& file) {
std::string content;
if (!File::ReadFileToString(file.c_str(), &content)) {
LOG(ERROR) << "Failed to open file " << file
<< " to determine file format.";
return "";
}
MediaContainerName container_name = DetermineContainer(
reinterpret_cast<const uint8_t*>(content.data()), content.size());
if (container_name == CONTAINER_WEBVTT) {
return "vtt";
} else if (container_name == CONTAINER_TTML) {
return "ttml";
}
return "";
}
MediaContainerName GetOutputFormat(const StreamDescriptor& descriptor) {
MediaContainerName output_format = CONTAINER_UNKNOWN;
if (!descriptor.output_format.empty()) {
output_format = DetermineContainerFromFormatName(descriptor.output_format);
if (output_format == CONTAINER_UNKNOWN) {
LOG(ERROR) << "Unable to determine output format from '"
<< descriptor.output_format << "'.";
}
} else {
const std::string& output_name = descriptor.output.empty()
? descriptor.segment_template
: descriptor.output;
if (output_name.empty())
return CONTAINER_UNKNOWN;
output_format = DetermineContainerFromFileName(output_name);
if (output_format == CONTAINER_UNKNOWN) {
LOG(ERROR) << "Unable to determine output format from '" << output_name
<< "'.";
}
}
return output_format;
}
bool ValidateStreamDescriptor(bool dump_stream_info,
const StreamDescriptor& descriptor) {
// Validate and insert the descriptor
if (descriptor.input.empty()) {
LOG(ERROR) << "Stream input not specified.";
return false;
}
if (!dump_stream_info && descriptor.stream_selector.empty()) {
LOG(ERROR) << "Stream stream_selector not specified.";
return false;
}
// We should have either output or segment_template specified.
const bool output_specified =
!descriptor.output.empty() || !descriptor.segment_template.empty();
if (!output_specified) {
if (!dump_stream_info) {
LOG(ERROR) << "Stream output not specified.";
return false;
}
} else {
const MediaContainerName output_format = GetOutputFormat(descriptor);
if (output_format == CONTAINER_UNKNOWN)
return false;
if (output_format == MediaContainerName::CONTAINER_MPEG2TS) {
if (descriptor.segment_template.empty()) {
LOG(ERROR) << "Please specify segment_template. Single file TS output "
"is not supported.";
return false;
}
// Note that MPEG2 TS doesn't need a separate initialization segment, so
// output field is not needed.
if (!descriptor.output.empty()) {
LOG(WARNING) << "TS init_segment '" << descriptor.output
<< "' ignored. TS muxer does not support initialization "
"segment generation.";
}
} else {
if (descriptor.output.empty()) {
LOG(ERROR) << "init_segment is required for format " << output_format;
return false;
}
}
}
return true;
}
bool ValidateParams(const PackagingParams& packaging_params,
const std::vector<StreamDescriptor>& stream_descriptors) {
if (!packaging_params.chunking_params.segment_sap_aligned &&
packaging_params.chunking_params.subsegment_sap_aligned) {
LOG(ERROR) << "Setting segment_sap_aligned to false but "
"subsegment_sap_aligned to true is not allowed.";
return false;
}
if (packaging_params.output_media_info &&
!packaging_params.mpd_params.mpd_output.empty()) {
LOG(ERROR) << "output_media_info and MPD output do not work together.";
return false;
}
if (packaging_params.output_media_info &&
!packaging_params.hls_params.master_playlist_output.empty()) {
LOG(ERROR) << "output_media_info and HLS output do not work together.";
return false;
}
// Since there isn't a muxer listener that can output both MPD and HLS,
// disallow specifying both MPD and HLS flags.
if (!packaging_params.mpd_params.mpd_output.empty() &&
!packaging_params.hls_params.master_playlist_output.empty()) {
LOG(ERROR) << "output both MPD and HLS are not supported.";
return false;
}
if (stream_descriptors.empty()) {
LOG(ERROR) << "Stream descriptors cannot be empty.";
return false;
}
// On demand profile generates single file segment while live profile
// generates multiple segments specified using segment template.
const bool on_demand_dash_profile =
stream_descriptors.begin()->segment_template.empty();
for (const auto& descriptor : stream_descriptors) {
if (on_demand_dash_profile != descriptor.segment_template.empty()) {
LOG(ERROR) << "Inconsistent stream descriptor specification: "
"segment_template should be specified for none or all "
"stream descriptors.";
return false;
}
if (!ValidateStreamDescriptor(packaging_params.test_params.dump_stream_info,
descriptor))
return false;
}
if (packaging_params.output_media_info && !on_demand_dash_profile) {
// TODO(rkuroiwa, kqyang): Support partial media info dump for live.
NOTIMPLEMENTED() << "ERROR: --output_media_info is only supported for "
"on-demand profile (not using segment_template).";
return false;
}
return true;
}
class StreamDescriptorCompareFn {
public:
bool operator()(const StreamDescriptor& a, const StreamDescriptor& b) {
if (a.input == b.input) {
if (a.stream_selector == b.stream_selector)
// Stream with high trick_play_factor is at the beginning.
return a.trick_play_factor > b.trick_play_factor;
else
return a.stream_selector < b.stream_selector;
}
return a.input < b.input;
}
};
/// Sorted list of StreamDescriptor.
typedef std::multiset<StreamDescriptor, StreamDescriptorCompareFn>
StreamDescriptorList;
// A fake clock that always return time 0 (epoch). Should only be used for
// testing.
class FakeClock : public base::Clock {
public:
base::Time Now() override { return base::Time(); }
};
class Job : public base::SimpleThread {
public:
Job(const std::string& name, std::shared_ptr<OriginHandler> work)
: SimpleThread(name), work_(work) {}
void Initialize() {
DCHECK(work_);
status_ = work_->Initialize();
}
void Cancel() {
DCHECK(work_);
work_->Cancel();
}
Status status() { return status_; }
private:
Job(const Job&) = delete;
Job& operator=(const Job&) = delete;
void Run() override {
DCHECK(work_);
status_ = work_->Run();
}
std::shared_ptr<OriginHandler> work_;
Status status_;
};
bool StreamInfoToTextMediaInfo(const StreamDescriptor& stream_descriptor,
const MuxerOptions& stream_muxer_options,
MediaInfo* text_media_info) {
const std::string& language = stream_descriptor.language;
const std::string format = DetermineTextFileFormat(stream_descriptor.input);
if (format.empty()) {
LOG(ERROR) << "Failed to determine the text file format for "
<< stream_descriptor.input;
return false;
}
if (!File::Copy(stream_descriptor.input.c_str(),
stream_muxer_options.output_file_name.c_str())) {
LOG(ERROR) << "Failed to copy the input file (" << stream_descriptor.input
<< ") to output file (" << stream_muxer_options.output_file_name
<< ").";
return false;
}
text_media_info->set_media_file_name(stream_muxer_options.output_file_name);
text_media_info->set_container_type(MediaInfo::CONTAINER_TEXT);
if (stream_muxer_options.bandwidth != 0) {
text_media_info->set_bandwidth(stream_muxer_options.bandwidth);
} else {
// Text files are usually small and since the input is one file; there's no
// way for the player to do ranged requests. So set this value to something
// reasonable.
const int kDefaultTextBandwidth = 256;
text_media_info->set_bandwidth(kDefaultTextBandwidth);
}
MediaInfo::TextInfo* text_info = text_media_info->mutable_text_info();
text_info->set_format(format);
if (!language.empty())
text_info->set_language(language);
return true;
}
std::shared_ptr<Muxer> CreateOutputMuxer(const MuxerOptions& options,
MediaContainerName container) {
if (container == CONTAINER_WEBM) {
return std::shared_ptr<Muxer>(new webm::WebMMuxer(options));
} else if (container == CONTAINER_MPEG2TS) {
return std::shared_ptr<Muxer>(new mp2t::TsMuxer(options));
} else {
DCHECK_EQ(container, CONTAINER_MOV);
return std::shared_ptr<Muxer>(new mp4::MP4Muxer(options));
}
}
bool CreateRemuxJobs(const StreamDescriptorList& stream_descriptors,
const PackagingParams& packaging_params,
FakeClock* fake_clock,
KeySource* encryption_key_source,
MpdNotifier* mpd_notifier,
hls::HlsNotifier* hls_notifier,
std::vector<std::unique_ptr<Job>>* jobs) {
// No notifiers OR (mpd_notifier XOR hls_notifier); which is NAND.
DCHECK(!(mpd_notifier && hls_notifier));
DCHECK(jobs);
std::shared_ptr<Demuxer> demuxer;
std::shared_ptr<TrickPlayHandler> trick_play_handler;
std::string previous_input;
std::string previous_stream_selector;
int stream_number = 0;
for (StreamDescriptorList::const_iterator
stream_iter = stream_descriptors.begin();
stream_iter != stream_descriptors.end();
++stream_iter, ++stream_number) {
MediaContainerName output_format = GetOutputFormat(*stream_iter);
// Process stream descriptor.
MuxerOptions stream_muxer_options;
stream_muxer_options.mp4_params = packaging_params.mp4_output_params;
stream_muxer_options.temp_dir = packaging_params.temp_dir;
stream_muxer_options.output_file_name = stream_iter->output;
if (!stream_iter->segment_template.empty()) {
if (!ValidateSegmentTemplate(stream_iter->segment_template)) {
LOG(ERROR) << "ERROR: segment template with '"
<< stream_iter->segment_template << "' is invalid.";
return false;
}
stream_muxer_options.segment_template = stream_iter->segment_template;
}
stream_muxer_options.bandwidth = stream_iter->bandwidth;
if (stream_iter->stream_selector == "text" &&
output_format != CONTAINER_MOV) {
MediaInfo text_media_info;
if (!StreamInfoToTextMediaInfo(*stream_iter, stream_muxer_options,
&text_media_info)) {
return false;
}
if (mpd_notifier) {
uint32_t unused;
if (!mpd_notifier->NotifyNewContainer(text_media_info, &unused)) {
LOG(ERROR) << "Failed to process text file " << stream_iter->input;
} else {
mpd_notifier->Flush();
}
} else if (packaging_params.output_media_info) {
VodMediaInfoDumpMuxerListener::WriteMediaInfoToFile(
text_media_info,
stream_muxer_options.output_file_name + kMediaInfoSuffix);
}
continue;
}
if (stream_iter->input != previous_input) {
// New remux job needed. Create demux and job thread.
demuxer = std::make_shared<Demuxer>(stream_iter->input);
demuxer->set_dump_stream_info(
packaging_params.test_params.dump_stream_info);
if (packaging_params.decryption_params.key_provider !=
KeyProvider::kNone) {
std::unique_ptr<KeySource> decryption_key_source(
CreateDecryptionKeySource(packaging_params.decryption_params));
if (!decryption_key_source)
return false;
demuxer->SetKeySource(std::move(decryption_key_source));
}
jobs->emplace_back(new media::Job("RemuxJob", demuxer));
trick_play_handler.reset();
previous_input = stream_iter->input;
// Skip setting up muxers if output is not needed.
if (stream_iter->output.empty() && stream_iter->segment_template.empty())
continue;
}
DCHECK(!jobs->empty());
// Each stream selector requires an individual trick play handler.
// E.g., an input with two video streams needs two trick play handlers.
// TODO(hmchen): add a test case in packager_test.py for two video streams
// input.
if (stream_iter->stream_selector != previous_stream_selector) {
previous_stream_selector = stream_iter->stream_selector;
trick_play_handler.reset();
}
std::shared_ptr<Muxer> muxer(
CreateOutputMuxer(stream_muxer_options, output_format));
if (packaging_params.test_params.inject_fake_clock)
muxer->set_clock(fake_clock);
std::unique_ptr<MuxerListener> muxer_listener;
DCHECK(!(packaging_params.output_media_info && mpd_notifier));
if (packaging_params.output_media_info) {
const std::string output_media_info_file_name =
stream_muxer_options.output_file_name + kMediaInfoSuffix;
std::unique_ptr<VodMediaInfoDumpMuxerListener>
vod_media_info_dump_muxer_listener(
new VodMediaInfoDumpMuxerListener(output_media_info_file_name));
muxer_listener = std::move(vod_media_info_dump_muxer_listener);
}
if (mpd_notifier) {
std::unique_ptr<MpdNotifyMuxerListener> mpd_notify_muxer_listener(
new MpdNotifyMuxerListener(mpd_notifier));
muxer_listener = std::move(mpd_notify_muxer_listener);
}
if (hls_notifier) {
// TODO(rkuroiwa): Do some smart stuff to group the audios, e.g. detect
// languages.
std::string group_id = stream_iter->hls_group_id;
std::string name = stream_iter->hls_name;
std::string hls_playlist_name = stream_iter->hls_playlist_name;
if (group_id.empty())
group_id = "audio";
if (name.empty())
name = base::StringPrintf("stream_%d", stream_number);
if (hls_playlist_name.empty())
hls_playlist_name = base::StringPrintf("stream_%d.m3u8", stream_number);
muxer_listener.reset(new HlsNotifyMuxerListener(hls_playlist_name, name,
group_id, hls_notifier));
}
if (muxer_listener)
muxer->SetMuxerListener(std::move(muxer_listener));
// Create a new trick_play_handler. Note that the stream_decriptors
// are sorted so that for the same input and stream_selector, the main
// stream is always the last one following the trick play streams.
if (stream_iter->trick_play_factor > 0) {
if (!trick_play_handler) {
trick_play_handler.reset(new TrickPlayHandler());
}
trick_play_handler->SetHandlerForTrickPlay(stream_iter->trick_play_factor,
std::move(muxer));
if (trick_play_handler->IsConnected())
continue;
} else if (trick_play_handler) {
trick_play_handler->SetHandlerForMainStream(std::move(muxer));
DCHECK(trick_play_handler->IsConnected());
continue;
}
std::vector<std::shared_ptr<MediaHandler>> handlers;
auto chunking_handler =
std::make_shared<ChunkingHandler>(packaging_params.chunking_params);
handlers.push_back(chunking_handler);
Status status;
if (encryption_key_source && !stream_iter->skip_encryption) {
auto encryption_params = packaging_params.encryption_params;
// Use Sample AES in MPEG2TS.
// TODO(kqyang): Consider adding a new flag to enable Sample AES as we
// will support CENC in TS in the future.
if (output_format == CONTAINER_MPEG2TS) {
VLOG(1) << "Use Apple Sample AES encryption for MPEG2TS.";
encryption_params.protection_scheme =
kAppleSampleAesProtectionScheme;
}
if (!encryption_params.stream_label_func) {
const int kDefaultMaxSdPixels = 768 * 576;
const int kDefaultMaxHdPixels = 1920 * 1080;
const int kDefaultMaxUhd1Pixels = 4096 * 2160;
encryption_params.stream_label_func = std::bind(
&Packager::DefaultStreamLabelFunction, kDefaultMaxSdPixels,
kDefaultMaxHdPixels, kDefaultMaxUhd1Pixels, std::placeholders::_1);
}
handlers.emplace_back(
new EncryptionHandler(encryption_params, encryption_key_source));
}
// If trick_play_handler is available, muxer should already be connected to
// trick_play_handler.
if (trick_play_handler) {
handlers.push_back(trick_play_handler);
} else {
handlers.push_back(std::move(muxer));
}
const std::string& stream_selector = stream_iter->stream_selector;
status.Update(demuxer->SetHandler(stream_selector, chunking_handler));
status.Update(ConnectHandlers(handlers));
if (!status.ok()) {
LOG(ERROR) << "Failed to setup graph: " << status;
return false;
}
if (!stream_iter->language.empty())
demuxer->SetLanguageOverride(stream_selector, stream_iter->language);
}
// Initialize processing graph.
for (const std::unique_ptr<Job>& job : *jobs) {
job->Initialize();
if (!job->status().ok()) {
LOG(ERROR) << "Failed to initialize processing graph " << job->status();
return false;
}
}
return true;
}
Status RunRemuxJobs(const std::vector<std::unique_ptr<Job>>& jobs) {
// Start the job threads.
for (const std::unique_ptr<Job>& job : jobs)
job->Start();
// Wait for all jobs to complete or an error occurs.
Status status;
bool all_joined;
do {
all_joined = true;
for (const std::unique_ptr<Job>& job : jobs) {
if (job->HasBeenJoined()) {
status = job->status();
if (!status.ok())
break;
} else {
all_joined = false;
job->Join();
}
}
} while (!all_joined && status.ok());
return status;
}
} // namespace
} // namespace media
struct Packager::PackagerInternal {
media::FakeClock fake_clock;
std::unique_ptr<KeySource> encryption_key_source;
std::unique_ptr<MpdNotifier> mpd_notifier;
std::unique_ptr<hls::HlsNotifier> hls_notifier;
std::vector<std::unique_ptr<media::Job>> jobs;
};
Packager::Packager() {}
Packager::~Packager() {}
Status Packager::Initialize(
const PackagingParams& packaging_params,
const std::vector<StreamDescriptor>& stream_descriptors) {
// Needed by base::WorkedPool used in ThreadedIoFile.
static base::AtExitManager exit;
static media::LibcryptoThreading libcrypto_threading;
if (internal_)
return Status(error::INVALID_ARGUMENT, "Already initialized.");
if (!media::ValidateParams(packaging_params, stream_descriptors))
return Status(error::INVALID_ARGUMENT, "Invalid packaging params.");
if (!packaging_params.test_params.injected_library_version.empty()) {
SetPackagerVersionForTesting(
packaging_params.test_params.injected_library_version);
}
std::unique_ptr<PackagerInternal> internal(new PackagerInternal);
const bool on_demand_dash_profile =
stream_descriptors.begin()->segment_template.empty();
MpdOptions mpd_options =
media::GetMpdOptions(on_demand_dash_profile, packaging_params.mpd_params);
// Create encryption key source if needed.
if (packaging_params.encryption_params.key_provider != KeyProvider::kNone) {
internal->encryption_key_source = CreateEncryptionKeySource(
static_cast<media::FourCC>(
packaging_params.encryption_params.protection_scheme),
packaging_params.encryption_params);
if (!internal->encryption_key_source)
return Status(error::INVALID_ARGUMENT, "Failed to create key source.");
}
const MpdParams& mpd_params = packaging_params.mpd_params;
if (!mpd_params.mpd_output.empty()) {
if (mpd_params.generate_dash_if_iop_compliant_mpd) {
internal->mpd_notifier.reset(new DashIopMpdNotifier(
mpd_options, mpd_params.base_urls, mpd_params.mpd_output));
} else {
internal->mpd_notifier.reset(new SimpleMpdNotifier(
mpd_options, mpd_params.base_urls, mpd_params.mpd_output));
}
if (!internal->mpd_notifier->Init()) {
LOG(ERROR) << "MpdNotifier failed to initialize.";
return Status(error::INVALID_ARGUMENT,
"Failed to initialize MpdNotifier.");
}
}
const HlsParams& hls_params = packaging_params.hls_params;
if (!hls_params.master_playlist_output.empty()) {
base::FilePath master_playlist_path(
base::FilePath::FromUTF8Unsafe(hls_params.master_playlist_output));
base::FilePath master_playlist_name = master_playlist_path.BaseName();
internal->hls_notifier.reset(new hls::SimpleHlsNotifier(
hls_params.playlist_type, hls_params.time_shift_buffer_depth,
hls_params.base_url,
master_playlist_path.DirName().AsEndingWithSeparator().AsUTF8Unsafe(),
master_playlist_name.AsUTF8Unsafe()));
}
media::StreamDescriptorList stream_descriptor_list;
for (const StreamDescriptor& descriptor : stream_descriptors)
stream_descriptor_list.insert(descriptor);
if (!media::CreateRemuxJobs(
stream_descriptor_list, packaging_params, &internal->fake_clock,
internal->encryption_key_source.get(), internal->mpd_notifier.get(),
internal->hls_notifier.get(), &internal->jobs)) {
return Status(error::INVALID_ARGUMENT, "Failed to create remux jobs.");
}
internal_ = std::move(internal);
return Status::OK;
}
Status Packager::Run() {
if (!internal_)
return Status(error::INVALID_ARGUMENT, "Not yet initialized.");
Status status = media::RunRemuxJobs(internal_->jobs);
if (!status.ok())
return status;
if (internal_->hls_notifier) {
if (!internal_->hls_notifier->Flush())
return Status(error::INVALID_ARGUMENT, "Failed to flush Hls.");
}
if (internal_->mpd_notifier) {
if (!internal_->mpd_notifier->Flush())
return Status(error::INVALID_ARGUMENT, "Failed to flush Mpd.");
}
return Status::OK;
}
void Packager::Cancel() {
if (!internal_) {
LOG(INFO) << "Not yet initialized. Return directly.";
return;
}
for (const std::unique_ptr<media::Job>& job : internal_->jobs)
job->Cancel();
}
std::string Packager::GetLibraryVersion() {
return GetPackagerVersion();
}
std::string Packager::DefaultStreamLabelFunction(
int max_sd_pixels,
int max_hd_pixels,
int max_uhd1_pixels,
const EncryptionParams::EncryptedStreamAttributes& stream_attributes) {
if (stream_attributes.stream_type ==
EncryptionParams::EncryptedStreamAttributes::kAudio)
return "AUDIO";
if (stream_attributes.stream_type ==
EncryptionParams::EncryptedStreamAttributes::kVideo) {
const int pixels = stream_attributes.oneof.video.width *
stream_attributes.oneof.video.height;
if (pixels <= max_sd_pixels) return "SD";
if (pixels <= max_hd_pixels) return "HD";
if (pixels <= max_uhd1_pixels) return "UHD1";
return "UHD2";
}
return "";
}
} // namespace shaka
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