238 lines
9.4 KiB
C++
238 lines
9.4 KiB
C++
// Copyright 2014 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#include "packager/app/packager_util.h"
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#include <gflags/gflags.h>
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#include <iostream>
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#include "packager/app/crypto_flags.h"
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#include "packager/app/fixed_key_encryption_flags.h"
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#include "packager/app/mpd_flags.h"
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#include "packager/app/muxer_flags.h"
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#include "packager/app/playready_key_encryption_flags.h"
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#include "packager/app/widevine_encryption_flags.h"
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#include "packager/base/logging.h"
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#include "packager/base/strings/string_number_conversions.h"
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#include "packager/media/base/fixed_key_source.h"
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#include "packager/media/base/media_handler.h"
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#include "packager/media/base/muxer_options.h"
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#include "packager/media/base/playready_key_source.h"
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#include "packager/media/base/request_signer.h"
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#include "packager/media/base/status.h"
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#include "packager/media/base/widevine_key_source.h"
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#include "packager/media/chunking/chunking_handler.h"
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#include "packager/media/crypto/encryption_handler.h"
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#include "packager/media/file/file.h"
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#include "packager/mpd/base/mpd_options.h"
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DEFINE_bool(mp4_use_decoding_timestamp_in_timeline,
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false,
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"If set, decoding timestamp instead of presentation timestamp will "
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"be used when generating media timeline, e.g. timestamps in sidx "
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"and mpd. This is to workaround a Chromium bug that decoding "
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"timestamp is used in buffered range, https://crbug.com/398130.");
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DEFINE_bool(dump_stream_info, false, "Dump demuxed stream info.");
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namespace shaka {
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namespace media {
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namespace {
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FourCC GetProtectionScheme(const std::string& protection_scheme) {
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if (protection_scheme == "cenc") {
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return FOURCC_cenc;
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} else if (protection_scheme == "cens") {
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return FOURCC_cens;
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} else if (protection_scheme == "cbc1") {
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return FOURCC_cbc1;
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} else if (protection_scheme == "cbcs") {
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return FOURCC_cbcs;
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} else {
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LOG(ERROR) << "Unknown protection scheme: " << protection_scheme;
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return FOURCC_NULL;
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}
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}
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} // namespace
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std::unique_ptr<RequestSigner> CreateSigner() {
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std::unique_ptr<RequestSigner> signer;
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if (!FLAGS_aes_signing_key.empty()) {
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signer.reset(AesRequestSigner::CreateSigner(
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FLAGS_signer, FLAGS_aes_signing_key, FLAGS_aes_signing_iv));
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if (!signer) {
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LOG(ERROR) << "Cannot create an AES signer object from '"
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<< FLAGS_aes_signing_key << "':'" << FLAGS_aes_signing_iv
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<< "'.";
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return std::unique_ptr<RequestSigner>();
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}
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} else if (!FLAGS_rsa_signing_key_path.empty()) {
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std::string rsa_private_key;
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if (!File::ReadFileToString(FLAGS_rsa_signing_key_path.c_str(),
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&rsa_private_key)) {
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LOG(ERROR) << "Failed to read from '" << FLAGS_rsa_signing_key_path
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<< "'.";
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return std::unique_ptr<RequestSigner>();
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}
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signer.reset(RsaRequestSigner::CreateSigner(FLAGS_signer, rsa_private_key));
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if (!signer) {
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LOG(ERROR) << "Cannot create a RSA signer object from '"
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<< FLAGS_rsa_signing_key_path << "'.";
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return std::unique_ptr<RequestSigner>();
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}
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}
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return signer;
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}
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std::unique_ptr<KeySource> CreateEncryptionKeySource(FourCC protection_scheme) {
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std::unique_ptr<KeySource> encryption_key_source;
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if (FLAGS_enable_widevine_encryption) {
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std::unique_ptr<WidevineKeySource> widevine_key_source(
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new WidevineKeySource(FLAGS_key_server_url, FLAGS_include_common_pssh));
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widevine_key_source->set_protection_scheme(protection_scheme);
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if (!FLAGS_signer.empty()) {
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std::unique_ptr<RequestSigner> request_signer(CreateSigner());
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if (!request_signer)
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return std::unique_ptr<KeySource>();
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widevine_key_source->set_signer(std::move(request_signer));
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}
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std::vector<uint8_t> content_id;
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if (!base::HexStringToBytes(FLAGS_content_id, &content_id)) {
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LOG(ERROR) << "Invalid content_id hex string specified.";
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return std::unique_ptr<KeySource>();
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}
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Status status = widevine_key_source->FetchKeys(content_id, FLAGS_policy);
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if (!status.ok()) {
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LOG(ERROR) << "Widevine encryption key source failed to fetch keys: "
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<< status.ToString();
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return std::unique_ptr<KeySource>();
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}
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encryption_key_source = std::move(widevine_key_source);
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} else if (FLAGS_enable_fixed_key_encryption) {
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encryption_key_source = FixedKeySource::CreateFromHexStrings(
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FLAGS_key_id, FLAGS_key, FLAGS_pssh, FLAGS_iv);
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} else if (FLAGS_enable_playready_encryption) {
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if (!FLAGS_playready_key_id.empty() && !FLAGS_playready_key.empty()) {
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encryption_key_source = PlayReadyKeySource::CreateFromKeyAndKeyId(
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FLAGS_playready_key_id, FLAGS_playready_key);
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} else if (!FLAGS_playready_server_url.empty() &&
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!FLAGS_program_identifier.empty()) {
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std::unique_ptr<PlayReadyKeySource> playready_key_source;
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if (!FLAGS_client_cert_file.empty() &&
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!FLAGS_client_cert_private_key_file.empty() &&
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!FLAGS_client_cert_private_key_password.empty()) {
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playready_key_source.reset(new PlayReadyKeySource(
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FLAGS_playready_server_url,
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FLAGS_client_cert_file,
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FLAGS_client_cert_private_key_file,
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FLAGS_client_cert_private_key_password));
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} else {
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playready_key_source.reset(new PlayReadyKeySource(
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FLAGS_playready_server_url));
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}
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if (!FLAGS_ca_file.empty()) {
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playready_key_source->SetCaFile(FLAGS_ca_file);
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}
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playready_key_source->FetchKeysWithProgramIdentifier(FLAGS_program_identifier);
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encryption_key_source = std::move(playready_key_source);
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} else {
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LOG(ERROR) << "Error creating PlayReady key source.";
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return std::unique_ptr<KeySource>();
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}
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}
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return encryption_key_source;
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}
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std::unique_ptr<KeySource> CreateDecryptionKeySource() {
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std::unique_ptr<KeySource> decryption_key_source;
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if (FLAGS_enable_widevine_decryption) {
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std::unique_ptr<WidevineKeySource> widevine_key_source(
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new WidevineKeySource(FLAGS_key_server_url, FLAGS_include_common_pssh));
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if (!FLAGS_signer.empty()) {
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std::unique_ptr<RequestSigner> request_signer(CreateSigner());
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if (!request_signer)
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return std::unique_ptr<KeySource>();
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widevine_key_source->set_signer(std::move(request_signer));
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}
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decryption_key_source = std::move(widevine_key_source);
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} else if (FLAGS_enable_fixed_key_decryption) {
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const char kNoPssh[] = "";
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const char kNoIv[] = "";
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decryption_key_source = FixedKeySource::CreateFromHexStrings(
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FLAGS_key_id, FLAGS_key, kNoPssh, kNoIv);
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}
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return decryption_key_source;
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}
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ChunkingOptions GetChunkingOptions() {
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ChunkingOptions chunking_options;
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chunking_options.segment_duration_in_seconds = FLAGS_segment_duration;
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chunking_options.subsegment_duration_in_seconds = FLAGS_fragment_duration;
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chunking_options.segment_sap_aligned = FLAGS_segment_sap_aligned;
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chunking_options.subsegment_sap_aligned = FLAGS_fragment_sap_aligned;
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return chunking_options;
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}
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EncryptionOptions GetEncryptionOptions() {
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EncryptionOptions encryption_options;
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encryption_options.clear_lead_in_seconds = FLAGS_clear_lead;
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encryption_options.protection_scheme =
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GetProtectionScheme(FLAGS_protection_scheme);
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encryption_options.max_sd_pixels = FLAGS_max_sd_pixels;
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encryption_options.max_hd_pixels = FLAGS_max_hd_pixels;
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encryption_options.max_uhd1_pixels = FLAGS_max_uhd1_pixels;
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encryption_options.crypto_period_duration_in_seconds =
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FLAGS_crypto_period_duration;
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encryption_options.vp9_subsample_encryption = FLAGS_vp9_subsample_encryption;
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return encryption_options;
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}
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MuxerOptions GetMuxerOptions() {
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MuxerOptions muxer_options;
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muxer_options.num_subsegments_per_sidx = FLAGS_num_subsegments_per_sidx;
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muxer_options.mp4_include_pssh_in_stream = FLAGS_mp4_include_pssh_in_stream;
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if (FLAGS_mp4_use_decoding_timestamp_in_timeline) {
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LOG(WARNING) << "Flag --mp4_use_decoding_timestamp_in_timeline is set. "
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"Note that it is a temporary hack to workaround Chromium "
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"bug https://crbug.com/398130. The flag may be removed "
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"when the Chromium bug is fixed.";
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}
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muxer_options.mp4_use_decoding_timestamp_in_timeline =
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FLAGS_mp4_use_decoding_timestamp_in_timeline;
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muxer_options.temp_dir = FLAGS_temp_dir;
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return muxer_options;
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}
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MpdOptions GetMpdOptions(bool on_demand_profile) {
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MpdOptions mpd_options;
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mpd_options.dash_profile =
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on_demand_profile ? DashProfile::kOnDemand : DashProfile::kLive;
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mpd_options.mpd_type = (on_demand_profile || FLAGS_generate_static_mpd)
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? MpdType::kStatic
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: MpdType::kDynamic;
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mpd_options.minimum_update_period = FLAGS_minimum_update_period;
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mpd_options.min_buffer_time = FLAGS_min_buffer_time;
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mpd_options.time_shift_buffer_depth = FLAGS_time_shift_buffer_depth;
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mpd_options.suggested_presentation_delay = FLAGS_suggested_presentation_delay;
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mpd_options.default_language = FLAGS_default_language;
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return mpd_options;
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}
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Status ConnectHandlers(std::vector<std::shared_ptr<MediaHandler>>& handlers) {
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size_t num_handlers = handlers.size();
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Status status;
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for (size_t i = 1; i < num_handlers; ++i) {
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status.Update(handlers[i - 1]->AddHandler(handlers[i]));
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}
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return status;
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}
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} // namespace media
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} // namespace shaka
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