blob: b0929f5b1637bcc68549c66f9e8b879c83d113f9 [file] [log] [blame]
// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <vector>
#include "base/callback.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "base/sequenced_task_runner.h"
#include "media/base/media_resource.h"
#include "media/base/pipeline.h"
namespace media {
class CdmContext;
class DemuxerStream;
class DecryptingDemuxerStream;
// DecryptingMediaResource is a wrapper for a MediaResource implementation that
// provides decryption. It should only be created when:
// - The |media_resource| has type MediaResource::STREAM, and
// - The |cdm_context| has a Decryptor that always supports decrypt-only.
// Internally DecryptingDemuxerStreams will be created for all streams in
// |media_resource| and decrypt them into clear streams. These clear streams are
// then passed downstream to the rest of the media pipeline, which should no
// longer need to worry about decryption.
class MEDIA_EXPORT DecryptingMediaResource : public MediaResource {
using InitCB = base::OnceCallback<void(bool success)>;
DecryptingMediaResource(MediaResource* media_resource,
CdmContext* cdm_context,
MediaLog* media_log,
scoped_refptr<base::SequencedTaskRunner> task_runner);
DecryptingMediaResource(const DecryptingMediaResource&) = delete;
DecryptingMediaResource& operator=(const DecryptingMediaResource&) = delete;
~DecryptingMediaResource() override;
// MediaResource implementation:
MediaResource::Type GetType() const override;
std::vector<DemuxerStream*> GetAllStreams() override;
void Initialize(InitCB init_cb, WaitingCB waiting_cb_);
// Returns the number of DecryptingDemuxerStreams that were created.
virtual int DecryptingDemuxerStreamCountForTesting() const;
void OnDecryptingDemuxerInitialized(PipelineStatus status);
MediaResource* const media_resource_;
CdmContext* const cdm_context_;
MediaLog* const media_log_;
scoped_refptr<base::SequencedTaskRunner> task_runner_;
// Number of DecryptingDemuxerStreams that have yet to be initialized.
int num_dds_pending_init_ = 0;
// |streams_| is the set of streams that this implementation does not own and
// will be returned when GetAllStreams() is invoked. |owned_streams_| is the
// set of DecryptingDemuxerStreams that we have created and own (i.e.
// responsible for destructing).
std::vector<DemuxerStream*> streams_;
std::vector<std::unique_ptr<DecryptingDemuxerStream>> owned_streams_;
// Called when the final DecryptingDemuxerStream has been initialized *or*
// if one of the DecryptingDemuxerStreams failed to initialize correctly.
InitCB init_cb_;
base::WeakPtrFactory<DecryptingMediaResource> weak_factory_{this};
} // namespace media