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shaka-packager/packager/app/packager_main.cc

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// Copyright 2014 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 <gflags/gflags.h>
#include <iostream>
#include "packager/app/ad_cue_generator_flags.h"
#include "packager/app/crypto_flags.h"
#include "packager/app/hls_flags.h"
#include "packager/app/manifest_flags.h"
#include "packager/app/mpd_flags.h"
#include "packager/app/muxer_flags.h"
#include "packager/app/packager_util.h"
#include "packager/app/playready_key_encryption_flags.h"
#include "packager/app/protection_system_flags.h"
#include "packager/app/raw_key_encryption_flags.h"
#include "packager/app/stream_descriptor.h"
#include "packager/app/vlog_flags.h"
#include "packager/app/widevine_encryption_flags.h"
#include "packager/base/command_line.h"
#include "packager/base/logging.h"
#include "packager/base/optional.h"
#include "packager/base/strings/string_number_conversions.h"
#include "packager/base/strings/string_split.h"
#include "packager/base/strings/string_util.h"
#include "packager/base/strings/stringprintf.h"
#include "packager/file/file.h"
#include "packager/packager.h"
#include "packager/tools/license_notice.h"
#if defined(OS_WIN)
#include <codecvt>
#include <functional>
#include <locale>
#endif // defined(OS_WIN)
DEFINE_bool(dump_stream_info, false, "Dump demuxed stream info.");
DEFINE_bool(licenses, false, "Dump licenses.");
DEFINE_bool(use_fake_clock_for_muxer,
false,
"Set to true to use a fake clock for muxer. With this flag set, "
"creation time and modification time in outputs are set to 0. "
"Should only be used for testing.");
DEFINE_bool(override_version,
false,
"Override packager version in the generated outputs with "
"--test_version if it is set to true. Should be used for "
"testing only.");
DEFINE_string(test_version,
"",
"Packager version for testing. Ignored if --override_version is "
"false. Should be used for testing only.");
namespace shaka {
namespace {
const char kUsage[] =
"%s [flags] <stream_descriptor> ...\n\n"
" stream_descriptor consists of comma separated field_name/value pairs:\n"
" field_name=value,[field_name=value,]...\n"
" Supported field names are as follows (names in parenthesis are alias):\n"
" - input (in): Required input/source media file path or network stream\n"
" URL.\n"
" - stream_selector (stream): Required field with value 'audio',\n"
" 'video', 'text', or stream number (zero based).\n"
" - output (out,init_segment): Required output file (single file) or\n"
" initialization file path (multiple file).\n"
" - segment_template (segment): Optional value which specifies the\n"
" naming pattern for the segment files, and that the stream should be\n"
" split into multiple files. Its presence should be consistent across\n"
" streams.\n"
" - bandwidth (bw): Optional value which contains a user-specified\n"
" content bit rate for the stream, in bits/sec. If specified, this\n"
" value is propagated to (HLS) EXT-X-STREAM-INF:BANDWIDTH or (DASH)\n"
" Representation@bandwidth and the $Bandwidth$ template parameter for\n"
" segment names. If not specified, the bandwidth value is estimated\n"
" from content bitrate. Note that it only affects the generated\n"
" manifests/playlists; it has no effect on the media content itself.\n"
" - language (lang): Optional value which contains a user-specified\n"
" language tag. If specified, this value overrides any language\n"
" metadata in the input stream.\n"
" - output_format (format): Optional value which specifies the format\n"
" of the output files (MP4 or WebM). If not specified, it will be\n"
" derived from the file extension of the output file.\n"
" - skip_encryption=0|1: Optional. Defaults to 0 if not specified. If\n"
" it is set to 1, no encryption of the stream will be made.\n"
" - drm_label: Optional value for custom DRM label, which defines the\n"
" encryption key applied to the stream. Typical values include AUDIO,\n"
" SD, HD, UHD1, UHD2. For raw key, it should be a label defined in\n"
" --keys. If not provided, the DRM label is derived from stream type\n"
" (video, audio), resolution, etc.\n"
" Note that it is case sensitive.\n"
" - trick_play_factor (tpf): Optional value which specifies the trick\n"
" play, a.k.a. trick mode, stream sampling rate among key frames.\n"
" If specified, the output is a trick play stream.\n"
" - hls_name: Used for HLS audio to set the NAME attribute for\n"
" EXT-X-MEDIA. Defaults to the base of the playlist name.\n"
" - hls_group_id: Used for HLS audio to set the GROUP-ID attribute for\n"
" EXT-X-MEDIA. Defaults to 'audio' if not specified.\n"
" - playlist_name: The HLS playlist file to create. Usually ends with\n"
" '.m3u8', and is relative to --hls_master_playlist_output. If\n"
" unspecified, defaults to something of the form 'stream_0.m3u8',\n"
" 'stream_1.m3u8', 'stream_2.m3u8', etc.\n"
" - iframe_playlist_name: The optional HLS I-Frames only playlist file\n"
" to create. Usually ends with '.m3u8', and is relative to\n"
" hls_master_playlist_output. Should only be set for video streams. If\n"
" unspecified, no I-Frames only playlist is created.\n";
// Labels for parameters in RawKey key info.
const char kDrmLabelLabel[] = "label";
const char kKeyIdLabel[] = "key_id";
const char kKeyLabel[] = "key";
enum ExitStatus {
kSuccess = 0,
kArgumentValidationFailed,
kPackagingFailed,
kInternalError,
};
bool GetWidevineSigner(WidevineSigner* signer) {
signer->signer_name = FLAGS_signer;
if (!FLAGS_aes_signing_key_bytes.empty()) {
signer->signing_key_type = WidevineSigner::SigningKeyType::kAes;
signer->aes.key = FLAGS_aes_signing_key_bytes;
signer->aes.iv = FLAGS_aes_signing_iv_bytes;
} else if (!FLAGS_rsa_signing_key_path.empty()) {
signer->signing_key_type = WidevineSigner::SigningKeyType::kRsa;
if (!File::ReadFileToString(FLAGS_rsa_signing_key_path.c_str(),
&signer->rsa.key)) {
LOG(ERROR) << "Failed to read from '" << FLAGS_rsa_signing_key_path
<< "'.";
return false;
}
}
return true;
}
bool GetHlsPlaylistType(const std::string& playlist_type,
HlsPlaylistType* playlist_type_enum) {
if (base::ToUpperASCII(playlist_type) == "VOD") {
*playlist_type_enum = HlsPlaylistType::kVod;
} else if (base::ToUpperASCII(playlist_type) == "LIVE") {
*playlist_type_enum = HlsPlaylistType::kLive;
} else if (base::ToUpperASCII(playlist_type) == "EVENT") {
*playlist_type_enum = HlsPlaylistType::kEvent;
} else {
LOG(ERROR) << "Unrecognized playlist type " << playlist_type;
return false;
}
return true;
}
bool GetProtectionScheme(uint32_t* protection_scheme) {
if (FLAGS_protection_scheme == "cenc") {
*protection_scheme = EncryptionParams::kProtectionSchemeCenc;
return true;
}
if (FLAGS_protection_scheme == "cbc1") {
*protection_scheme = EncryptionParams::kProtectionSchemeCbc1;
return true;
}
if (FLAGS_protection_scheme == "cbcs") {
*protection_scheme = EncryptionParams::kProtectionSchemeCbcs;
return true;
}
if (FLAGS_protection_scheme == "cens") {
*protection_scheme = EncryptionParams::kProtectionSchemeCens;
return true;
}
LOG(ERROR) << "Unrecognized protection_scheme " << FLAGS_protection_scheme;
return false;
}
bool ParseKeys(const std::string& keys, RawKeyParams* raw_key) {
for (const std::string& key_data : base::SplitString(
keys, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY)) {
base::StringPairs string_pairs;
base::SplitStringIntoKeyValuePairs(key_data, '=', ':', &string_pairs);
std::map<std::string, std::string> value_map;
for (const auto& string_pair : string_pairs)
value_map[string_pair.first] = string_pair.second;
const std::string drm_label = value_map[kDrmLabelLabel];
if (raw_key->key_map.find(drm_label) != raw_key->key_map.end()) {
LOG(ERROR) << "Seeing duplicated DRM label '" << drm_label << "'.";
return false;
}
auto& key_info = raw_key->key_map[drm_label];
if (value_map[kKeyIdLabel].empty() ||
!base::HexStringToBytes(value_map[kKeyIdLabel], &key_info.key_id)) {
LOG(ERROR) << "Empty key id or invalid hex string for key id: "
<< value_map[kKeyIdLabel];
return false;
}
if (value_map[kKeyLabel].empty() ||
!base::HexStringToBytes(value_map[kKeyLabel], &key_info.key)) {
LOG(ERROR) << "Empty key or invalid hex string for key: "
<< value_map[kKeyLabel];
return false;
}
}
return true;
}
bool GetRawKeyParams(RawKeyParams* raw_key) {
raw_key->iv = FLAGS_iv_bytes;
raw_key->pssh = FLAGS_pssh_bytes;
if (!FLAGS_keys.empty()) {
if (!ParseKeys(FLAGS_keys, raw_key)) {
LOG(ERROR) << "Failed to parse --keys " << FLAGS_keys;
return false;
}
} else {
// An empty StreamLabel specifies the default key info.
RawKeyParams::KeyInfo& key_info = raw_key->key_map[""];
key_info.key_id = FLAGS_key_id_bytes;
key_info.key = FLAGS_key_bytes;
}
return true;
}
bool ParseAdCues(const std::string& ad_cues, std::vector<Cuepoint>* cuepoints) {
// Track if optional field is supplied consistently across all cue points.
size_t duration_count = 0;
for (const std::string& ad_cue : base::SplitString(
ad_cues, ";", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY)) {
Cuepoint cuepoint;
auto split_ad_cue = base::SplitString(ad_cue, ",", base::TRIM_WHITESPACE,
base::SPLIT_WANT_NONEMPTY);
if (split_ad_cue.size() > 2) {
LOG(ERROR) << "Failed to parse --ad_cues " << ad_cues
<< " Each ad cue must contain no more than 2 components.";
}
if (!base::StringToDouble(split_ad_cue.front(),
&cuepoint.start_time_in_seconds)) {
LOG(ERROR) << "Failed to parse --ad_cues " << ad_cues
<< " Start time component must be of type double.";
return false;
}
if (split_ad_cue.size() > 1) {
duration_count++;
if (!base::StringToDouble(split_ad_cue[1],
&cuepoint.duration_in_seconds)) {
LOG(ERROR) << "Failed to parse --ad_cues " << ad_cues
<< " Duration component must be of type double.";
return false;
}
}
cuepoints->push_back(cuepoint);
}
if (duration_count > 0 && duration_count != cuepoints->size()) {
LOG(ERROR) << "Failed to parse --ad_cues " << ad_cues
<< " Duration component is optional. However if it is supplied,"
<< " it must be supplied consistently across all cuepoints.";
return false;
}
return true;
}
base::Optional<PackagingParams> GetPackagingParams() {
PackagingParams packaging_params;
packaging_params.temp_dir = FLAGS_temp_dir;
AdCueGeneratorParams& ad_cue_generator_params =
packaging_params.ad_cue_generator_params;
if (!ParseAdCues(FLAGS_ad_cues, &ad_cue_generator_params.cue_points)) {
return base::nullopt;
}
ChunkingParams& chunking_params = packaging_params.chunking_params;
chunking_params.segment_duration_in_seconds = FLAGS_segment_duration;
chunking_params.subsegment_duration_in_seconds = FLAGS_fragment_duration;
chunking_params.segment_sap_aligned = FLAGS_segment_sap_aligned;
chunking_params.subsegment_sap_aligned = FLAGS_fragment_sap_aligned;
int num_key_providers = 0;
EncryptionParams& encryption_params = packaging_params.encryption_params;
encryption_params.generate_common_pssh = FLAGS_generate_common_pssh;
encryption_params.generate_playready_pssh = FLAGS_generate_playready_pssh;
encryption_params.generate_widevine_pssh = FLAGS_generate_widevine_pssh;
if (FLAGS_enable_widevine_encryption) {
encryption_params.key_provider = KeyProvider::kWidevine;
++num_key_providers;
}
if (FLAGS_enable_playready_encryption) {
encryption_params.key_provider = KeyProvider::kPlayReady;
++num_key_providers;
}
if (FLAGS_enable_raw_key_encryption) {
encryption_params.key_provider = KeyProvider::kRawKey;
++num_key_providers;
}
if (num_key_providers > 1) {
LOG(ERROR) << "Only one of --enable_widevine_encryption, "
"--enable_playready_encryption, "
"--enable_raw_key_encryption can be enabled.";
return base::nullopt;
}
if (encryption_params.key_provider != KeyProvider::kNone) {
encryption_params.clear_lead_in_seconds = FLAGS_clear_lead;
if (!GetProtectionScheme(&encryption_params.protection_scheme))
return base::nullopt;
encryption_params.crypto_period_duration_in_seconds =
FLAGS_crypto_period_duration;
encryption_params.vp9_subsample_encryption = FLAGS_vp9_subsample_encryption;
encryption_params.stream_label_func = std::bind(
&Packager::DefaultStreamLabelFunction, FLAGS_max_sd_pixels,
FLAGS_max_hd_pixels, FLAGS_max_uhd1_pixels, std::placeholders::_1);
}
switch (encryption_params.key_provider) {
case KeyProvider::kWidevine: {
WidevineEncryptionParams& widevine = encryption_params.widevine;
widevine.key_server_url = FLAGS_key_server_url;
widevine.content_id = FLAGS_content_id_bytes;
widevine.policy = FLAGS_policy;
widevine.group_id = FLAGS_group_id_bytes;
if (!GetWidevineSigner(&widevine.signer))
return base::nullopt;
break;
}
case KeyProvider::kPlayReady: {
PlayReadyEncryptionParams& playready = encryption_params.playready;
playready.key_server_url = FLAGS_playready_server_url;
playready.program_identifier = FLAGS_program_identifier;
playready.ca_file = FLAGS_ca_file;
playready.client_cert_file = FLAGS_client_cert_file;
playready.client_cert_private_key_file =
FLAGS_client_cert_private_key_file;
playready.client_cert_private_key_password =
FLAGS_client_cert_private_key_password;
break;
}
case KeyProvider::kRawKey: {
if (!GetRawKeyParams(&encryption_params.raw_key))
return base::nullopt;
break;
}
case KeyProvider::kNone:
break;
}
num_key_providers = 0;
DecryptionParams& decryption_params = packaging_params.decryption_params;
if (FLAGS_enable_widevine_decryption) {
decryption_params.key_provider = KeyProvider::kWidevine;
++num_key_providers;
}
if (FLAGS_enable_raw_key_decryption) {
decryption_params.key_provider = KeyProvider::kRawKey;
++num_key_providers;
}
if (num_key_providers > 1) {
LOG(ERROR) << "Only one of --enable_widevine_decryption, "
"--enable_raw_key_decryption can be enabled.";
return base::nullopt;
}
switch (decryption_params.key_provider) {
case KeyProvider::kWidevine: {
WidevineDecryptionParams& widevine = decryption_params.widevine;
widevine.key_server_url = FLAGS_key_server_url;
if (!GetWidevineSigner(&widevine.signer))
return base::nullopt;
break;
}
case KeyProvider::kRawKey: {
if (!GetRawKeyParams(&decryption_params.raw_key))
return base::nullopt;
break;
}
case KeyProvider::kPlayReady:
case KeyProvider::kNone:
break;
}
Mp4OutputParams& mp4_params = packaging_params.mp4_output_params;
mp4_params.num_subsegments_per_sidx = FLAGS_num_subsegments_per_sidx;
if (FLAGS_mp4_use_decoding_timestamp_in_timeline) {
LOG(WARNING) << "Flag --mp4_use_decoding_timestamp_in_timeline is set. "
"Note that it is a temporary hack to workaround Chromium "
"bug https://crbug.com/398130. The flag may be removed "
"when the Chromium bug is fixed.";
}
mp4_params.use_decoding_timestamp_in_timeline =
FLAGS_mp4_use_decoding_timestamp_in_timeline;
mp4_params.include_pssh_in_stream = FLAGS_mp4_include_pssh_in_stream;
packaging_params.output_media_info = FLAGS_output_media_info;
MpdParams& mpd_params = packaging_params.mpd_params;
mpd_params.mpd_output = FLAGS_mpd_output;
mpd_params.base_urls = base::SplitString(
FLAGS_base_urls, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
mpd_params.min_buffer_time = FLAGS_min_buffer_time;
mpd_params.minimum_update_period = FLAGS_minimum_update_period;
mpd_params.suggested_presentation_delay = FLAGS_suggested_presentation_delay;
mpd_params.time_shift_buffer_depth = FLAGS_time_shift_buffer_depth;
if (!FLAGS_utc_timings.empty()) {
base::StringPairs pairs;
if (!base::SplitStringIntoKeyValuePairs(FLAGS_utc_timings, '=', ',',
&pairs)) {
LOG(ERROR) << "Invalid --utc_timings scheme_id_uri/value pairs.";
return base::nullopt;
}
for (const auto& string_pair : pairs) {
mpd_params.utc_timings.push_back({string_pair.first, string_pair.second});
}
}
mpd_params.default_language = FLAGS_default_language;
mpd_params.generate_static_live_mpd = FLAGS_generate_static_mpd;
mpd_params.generate_dash_if_iop_compliant_mpd =
FLAGS_generate_dash_if_iop_compliant_mpd;
HlsParams& hls_params = packaging_params.hls_params;
if (!GetHlsPlaylistType(FLAGS_hls_playlist_type, &hls_params.playlist_type)) {
return base::nullopt;
}
hls_params.master_playlist_output = FLAGS_hls_master_playlist_output;
hls_params.base_url = FLAGS_hls_base_url;
hls_params.key_uri = FLAGS_hls_key_uri;
hls_params.time_shift_buffer_depth = FLAGS_time_shift_buffer_depth;
hls_params.default_language = FLAGS_default_language;
TestParams& test_params = packaging_params.test_params;
test_params.dump_stream_info = FLAGS_dump_stream_info;
test_params.inject_fake_clock = FLAGS_use_fake_clock_for_muxer;
if (FLAGS_override_version)
test_params.injected_library_version = FLAGS_test_version;
return packaging_params;
}
int PackagerMain(int argc, char** argv) {
// Needed to enable VLOG/DVLOG through --vmodule or --v.
base::CommandLine::Init(argc, argv);
// Set up logging.
logging::LoggingSettings log_settings;
log_settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
CHECK(logging::InitLogging(log_settings));
google::SetVersionString(shaka::Packager::GetLibraryVersion());
google::SetUsageMessage(base::StringPrintf(kUsage, argv[0]));
google::ParseCommandLineFlags(&argc, &argv, true);
if (FLAGS_licenses) {
for (const char* line : kLicenseNotice)
std::cout << line << std::endl;
return kSuccess;
}
if (argc < 2) {
google::ShowUsageWithFlags("Usage");
return kSuccess;
}
if (!ValidateWidevineCryptoFlags() || !ValidateRawKeyCryptoFlags() ||
!ValidatePRCryptoFlags()) {
return kArgumentValidationFailed;
}
base::Optional<PackagingParams> packaging_params = GetPackagingParams();
if (!packaging_params)
return kArgumentValidationFailed;
std::vector<StreamDescriptor> stream_descriptors;
for (int i = 1; i < argc; ++i) {
base::Optional<StreamDescriptor> stream_descriptor =
ParseStreamDescriptor(argv[i]);
if (!stream_descriptor)
return kArgumentValidationFailed;
stream_descriptors.push_back(stream_descriptor.value());
}
Packager packager;
Status status =
packager.Initialize(packaging_params.value(), stream_descriptors);
if (!status.ok()) {
LOG(ERROR) << "Failed to initialize packager: " << status.ToString();
return kArgumentValidationFailed;
}
status = packager.Run();
if (!status.ok()) {
LOG(ERROR) << "Packaging Error: " << status.ToString();
return kPackagingFailed;
}
printf("Packaging completed successfully.\n");
return kSuccess;
}
} // namespace
} // namespace shaka
#if defined(OS_WIN)
// Windows wmain, which converts wide character arguments to UTF-8.
int wmain(int argc, wchar_t* argv[], wchar_t* envp[]) {
std::unique_ptr<char* [], std::function<void(char**)>> utf8_argv(
new char*[argc], [argc](char** utf8_args) {
// TODO(tinskip): This leaks, but if this code is enabled, it crashes.
// Figure out why. I suspect gflags does something funny with the
// argument array.
// for (int idx = 0; idx < argc; ++idx)
// delete[] utf8_args[idx];
delete[] utf8_args;
});
std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
for (int idx = 0; idx < argc; ++idx) {
std::string utf8_arg(converter.to_bytes(argv[idx]));
utf8_arg += '\0';
utf8_argv[idx] = new char[utf8_arg.size()];
memcpy(utf8_argv[idx], &utf8_arg[0], utf8_arg.size());
}
return shaka::PackagerMain(argc, utf8_argv.get());
}
#else
int main(int argc, char** argv) {
return shaka::PackagerMain(argc, argv);
}
#endif // defined(OS_WIN)
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