| // Copyright 2014 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 COBALT_MEDIA_BASE_DEMUXER_STREAM_PROVIDER_H_ |
| #define COBALT_MEDIA_BASE_DEMUXER_STREAM_PROVIDER_H_ |
| |
| #include "base/basictypes.h" |
| #include "cobalt/media/base/demuxer_stream.h" |
| #include "cobalt/media/base/media_export.h" |
| #include "googleurl/src/gurl.h" |
| |
| namespace cobalt { |
| namespace media { |
| |
| // Abstract class that defines how to retrieve "media sources" in DemuxerStream |
| // form (for most cases) or URL form (for the MediaPlayerRenderer case). |
| // |
| // The sub-classes do not stricly provide demuxer streams, but because all |
| // sub-classes are for the moment Demuxers, this class has not been renamed to |
| // "MediaProvider". This class would be a good candidate for renaming, if |
| // ever Pipeline were to support this class directly, instead of the Demuxer |
| // interface. |
| // |
| // The derived classes must return a non-null value for the getter method |
| // associated with their type, and return a null/empty value for other getters. |
| class MEDIA_EXPORT DemuxerStreamProvider { |
| public: |
| enum Type { |
| STREAM, // Indicates GetStream() should be used |
| URL, // Indicates GetUrl() should be used |
| }; |
| |
| DemuxerStreamProvider(); |
| virtual ~DemuxerStreamProvider(); |
| |
| // For Type::STREAM: |
| // Returns the first stream of the given stream type (which is not allowed |
| // to be DemuxerStream::TEXT), or NULL if that type of stream is not |
| // present. |
| // Other types: |
| // Should not be called. |
| virtual DemuxerStream* GetStream(DemuxerStream::Type type) = 0; |
| |
| // For Type::URL: |
| // Returns the URL of the media to play. This might be an empty URL, and |
| // should be handled appropriately by the caller. |
| // Other types: |
| // Should not be called. |
| virtual GURL GetUrl() const; |
| |
| virtual DemuxerStreamProvider::Type GetType() const; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(DemuxerStreamProvider); |
| }; |
| |
| } // namespace media |
| } // namespace cobalt |
| |
| #endif // COBALT_MEDIA_BASE_DEMUXER_STREAM_PROVIDER_H_ |