127 lines
3.8 KiB
C++
127 lines
3.8 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/media/base/muxer.h"
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#include <algorithm>
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#include "packager/media/base/fourccs.h"
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#include "packager/media/base/media_sample.h"
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#include "packager/media/base/media_stream.h"
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namespace shaka {
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namespace media {
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Muxer::Muxer(const MuxerOptions& options)
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: options_(options),
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initialized_(false),
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encryption_key_source_(NULL),
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max_sd_pixels_(0),
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max_hd_pixels_(0),
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max_uhd1_pixels_(0),
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clear_lead_in_seconds_(0),
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crypto_period_duration_in_seconds_(0),
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protection_scheme_(FOURCC_NULL),
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cancelled_(false),
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clock_(NULL) {}
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Muxer::~Muxer() {}
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void Muxer::SetKeySource(KeySource* encryption_key_source,
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uint32_t max_sd_pixels,
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uint32_t max_hd_pixels,
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uint32_t max_uhd1_pixels,
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double clear_lead_in_seconds,
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double crypto_period_duration_in_seconds,
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FourCC protection_scheme) {
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DCHECK(encryption_key_source);
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encryption_key_source_ = encryption_key_source;
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max_sd_pixels_ = max_sd_pixels;
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max_hd_pixels_ = max_hd_pixels;
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max_uhd1_pixels_ = max_uhd1_pixels;
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clear_lead_in_seconds_ = clear_lead_in_seconds;
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crypto_period_duration_in_seconds_ = crypto_period_duration_in_seconds;
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protection_scheme_ = protection_scheme;
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}
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void Muxer::AddStream(MediaStream* stream) {
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DCHECK(stream);
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stream->Connect(this);
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streams_.push_back(stream);
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}
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Status Muxer::Run() {
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DCHECK(!streams_.empty());
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Status status;
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// Start the streams.
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for (std::vector<MediaStream*>::iterator it = streams_.begin();
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it != streams_.end();
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++it) {
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status = (*it)->Start(MediaStream::kPull);
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if (!status.ok())
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return status;
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}
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uint32_t current_stream_id = 0;
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while (status.ok()) {
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if (cancelled_)
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return Status(error::CANCELLED, "muxer run cancelled");
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scoped_refptr<MediaSample> sample;
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status = streams_[current_stream_id]->PullSample(&sample);
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if (!status.ok())
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break;
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status = AddSample(streams_[current_stream_id], sample);
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// Switch to next stream if the current stream is ready for fragmentation.
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if (status.error_code() == error::FRAGMENT_FINALIZED) {
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current_stream_id = (current_stream_id + 1) % streams_.size();
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status.Clear();
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}
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}
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// Finalize the muxer after reaching end of stream.
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return status.error_code() == error::END_OF_STREAM ? Finalize() : status;
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}
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void Muxer::Cancel() {
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cancelled_ = true;
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}
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void Muxer::SetMuxerListener(std::unique_ptr<MuxerListener> muxer_listener) {
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muxer_listener_ = std::move(muxer_listener);
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}
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void Muxer::SetProgressListener(
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std::unique_ptr<ProgressListener> progress_listener) {
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progress_listener_ = std::move(progress_listener);
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}
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Status Muxer::AddSample(const MediaStream* stream,
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scoped_refptr<MediaSample> sample) {
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DCHECK(std::find(streams_.begin(), streams_.end(), stream) != streams_.end());
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if (!initialized_) {
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Status status = Initialize();
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if (!status.ok())
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return status;
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initialized_ = true;
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}
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if (sample->end_of_stream()) {
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// EOS sample should be sent only when the sample was pushed from Demuxer
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// to Muxer. In this case, there should be only one stream in Muxer.
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DCHECK_EQ(1u, streams_.size());
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return Finalize();
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} else if (sample->is_encrypted()) {
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LOG(ERROR) << "Unable to multiplex encrypted media sample";
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return Status(error::INTERNAL_ERROR, "Encrypted media sample.");
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}
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return DoAddSample(stream, sample);
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}
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} // namespace media
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} // namespace shaka
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