Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(218)

Unified Diff: media/filters/audio_decoder_selector.h

Issue 11492003: Encrypted Media: Support Audio Decrypt-Only. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: comments resolved Created 8 years ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
Index: media/filters/audio_decoder_selector.h
diff --git a/media/filters/audio_decoder_selector.h b/media/filters/audio_decoder_selector.h
new file mode 100644
index 0000000000000000000000000000000000000000..c94d73a96b5f0768a4db992c5d92da91a546bdac
--- /dev/null
+++ b/media/filters/audio_decoder_selector.h
@@ -0,0 +1,83 @@
+// Copyright (c) 2012 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.
+
+#ifndef MEDIA_FILTERS_AUDIO_DECODER_SELECTOR_H_
+#define MEDIA_FILTERS_AUDIO_DECODER_SELECTOR_H_
+
+#include <list>
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "media/base/audio_decoder.h"
+#include "media/base/decryptor.h"
+#include "media/base/demuxer_stream.h"
+
+namespace base {
+class MessageLoopProxy;
+}
+
+namespace media {
+
+class DecoderBuffer;
+class DecryptingDemuxerStream;
+class Decryptor;
+
+// AudioDecoderSelector (creates if necessary and) initializes the proper
+// AudioDecoder for a given DemuxerStream. If the given DemuxerStream is
+// encrypted, a DecryptingDemuxerStream may also be created.
+class MEDIA_EXPORT AudioDecoderSelector {
+ public:
+ typedef std::list<scoped_refptr<AudioDecoder> > AudioDecoderList;
+
+ // Indicates completion of AudioDecoder selection.
+ // - First parameter: The initialized AudioDecoder. If it's set to NULL, then
+ // AudioDecoder initialization failed.
+ // - Second parameter: The initialized DecryptingDemuxerStream. If it's not
+ // NULL, then a DecryptingDemuxerStream is created and initialized to do
+ // decryption for the initialized AudioDecoder.
+ // Note: The caller owns selected AudioDecoder and DecryptingDemuxerStream.
+ // The caller should call DecryptingDemuxerStream::Reset() before
+ // calling AudioDecoder::Reset() to release any pending decryption or read.
+ typedef base::Callback<
+ void(const scoped_refptr<AudioDecoder>&,
+ const scoped_refptr<DecryptingDemuxerStream>&)> SelectDecoderCB;
+
+ // |set_decryptor_ready_cb| is optional. If |set_decryptor_ready_cb| is null,
+ // no decryptor will be available to perform decryption.
+ AudioDecoderSelector(
+ const scoped_refptr<base::MessageLoopProxy>& message_loop,
+ const AudioDecoderList& decoders,
+ const SetDecryptorReadyCB& set_decryptor_ready_cb);
+ ~AudioDecoderSelector();
+
+ void SelectAudioDecoder(const scoped_refptr<DemuxerStream>& stream,
scherkus (not reviewing) 2012/12/14 06:39:12 needs docs
xhwang 2012/12/14 07:45:06 Done.
+ const StatisticsCB& statistics_cb,
+ const SelectDecoderCB& select_decoder_cb);
+
+ private:
+ void DecryptingAudioDecoderInitDone(PipelineStatus status);
+ void DecryptingDemuxerStreamInitDone(PipelineStatus status);
+ void InitializeNextDecoder();
+ void DecoderInitDone(PipelineStatus status);
+
+ scoped_refptr<base::MessageLoopProxy> message_loop_;
+ AudioDecoderList decoders_;
+ SetDecryptorReadyCB set_decryptor_ready_cb_;
+
+ scoped_refptr<DemuxerStream> input_stream_;
+ StatisticsCB statistics_cb_;
+ SelectDecoderCB select_decoder_cb_;
+
+ scoped_refptr<AudioDecoder> audio_decoder_;
+ scoped_refptr<DecryptingDemuxerStream> decrypted_stream_;
+
+ base::WeakPtrFactory<AudioDecoderSelector> weak_ptr_factory_;
+
+ DISALLOW_IMPLICIT_CONSTRUCTORS(AudioDecoderSelector);
+};
+
+} // namespace media
+
+#endif // MEDIA_FILTERS_AUDIO_DECODER_SELECTOR_H_

Powered by Google App Engine
This is Rietveld 408576698