241 lines
8.9 KiB
C++
241 lines
8.9 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/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/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_stream.h"
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#include "packager/media/base/muxer.h"
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#include "packager/media/base/muxer_options.h"
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#include "packager/media/base/request_signer.h"
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#include "packager/media/base/stream_info.h"
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#include "packager/media/base/widevine_key_source.h"
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#include "packager/media/file/file.h"
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#include "packager/mpd/base/mpd_builder.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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void DumpStreamInfo(const std::vector<MediaStream*>& streams) {
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printf("Found %zu stream(s).\n", streams.size());
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for (size_t i = 0; i < streams.size(); ++i)
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printf("Stream [%zu] %s\n", i, streams[i]->info()->ToString().c_str());
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}
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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() {
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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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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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}
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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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bool AssignFlagsFromProfile() {
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bool single_segment = FLAGS_single_segment;
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if (FLAGS_profile == "on-demand") {
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single_segment = true;
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} else if (FLAGS_profile == "live") {
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single_segment = false;
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} else if (FLAGS_profile != "") {
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fprintf(stderr, "ERROR: --profile '%s' is not supported.\n",
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FLAGS_profile.c_str());
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return false;
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}
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if (FLAGS_single_segment != single_segment) {
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FLAGS_single_segment = single_segment;
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fprintf(stdout, "Profile %s: set --single_segment to %s.\n",
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FLAGS_profile.c_str(), single_segment ? "true" : "false");
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}
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return true;
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}
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bool GetMuxerOptions(MuxerOptions* muxer_options) {
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DCHECK(muxer_options);
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muxer_options->single_segment = FLAGS_single_segment;
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muxer_options->segment_duration = FLAGS_segment_duration;
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muxer_options->fragment_duration = FLAGS_fragment_duration;
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muxer_options->segment_sap_aligned = FLAGS_segment_sap_aligned;
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muxer_options->fragment_sap_aligned = FLAGS_fragment_sap_aligned;
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muxer_options->num_subsegments_per_sidx = FLAGS_num_subsegments_per_sidx;
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muxer_options->webm_subsample_encryption = FLAGS_webm_subsample_encryption;
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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 true;
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}
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bool GetMpdOptions(MpdOptions* mpd_options) {
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DCHECK(mpd_options);
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mpd_options->availability_time_offset = FLAGS_availability_time_offset;
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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 =
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FLAGS_suggested_presentation_delay;
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return true;
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}
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MediaStream* FindFirstStreamOfType(const std::vector<MediaStream*>& streams,
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StreamType stream_type) {
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typedef std::vector<MediaStream*>::const_iterator StreamIterator;
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for (StreamIterator it = streams.begin(); it != streams.end(); ++it) {
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if ((*it)->info()->stream_type() == stream_type)
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return *it;
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}
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return NULL;
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}
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MediaStream* FindFirstVideoStream(const std::vector<MediaStream*>& streams) {
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return FindFirstStreamOfType(streams, kStreamVideo);
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}
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MediaStream* FindFirstAudioStream(const std::vector<MediaStream*>& streams) {
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return FindFirstStreamOfType(streams, kStreamAudio);
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}
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bool AddStreamToMuxer(const std::vector<MediaStream*>& streams,
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const std::string& stream_selector,
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const std::string& language_override,
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Muxer* muxer) {
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DCHECK(muxer);
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MediaStream* stream = NULL;
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if (stream_selector == "video") {
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stream = FindFirstVideoStream(streams);
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} else if (stream_selector == "audio") {
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stream = FindFirstAudioStream(streams);
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} else {
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// Expect stream_selector to be a zero based stream id.
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size_t stream_id;
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if (!base::StringToSizeT(stream_selector, &stream_id) ||
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stream_id >= streams.size()) {
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LOG(ERROR) << "Invalid argument --stream=" << stream_selector << "; "
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<< "should be 'audio', 'video', or a number within [0, "
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<< streams.size() - 1 << "].";
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return false;
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}
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stream = streams[stream_id];
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DCHECK(stream);
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}
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// This could occur only if stream_selector=audio|video and the corresponding
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// stream does not exist in the input.
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if (!stream) {
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LOG(ERROR) << "No " << stream_selector << " stream found in the input.";
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return false;
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}
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if (!language_override.empty()) {
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stream->info()->set_language(language_override);
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}
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muxer->AddStream(stream);
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return true;
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}
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} // namespace media
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} // namespace shaka
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