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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 module media.interfaces; | |
| 6 | |
| 7 import "media/mojo/interfaces/demuxer_stream.mojom"; | |
| 8 import "media/mojo/interfaces/media_types.mojom"; | |
| 9 | |
| 10 interface MediaRenderer { | |
| 11 // Initializes the Renderer with one or both of an audio and video stream, | |
| 12 // executing the callback with whether the initialization succeeded. | |
| 13 Initialize(MediaRendererClient client, | |
| 14 DemuxerStream? audio, | |
| 15 DemuxerStream? video) => (bool success); | |
| 16 | |
| 17 // Discards any buffered data, executing callback when completed. | |
| 18 // NOTE: If an error occurs, MediaRendererClient::OnError() can be called | |
| 19 // before the callback is executed. | |
| 20 Flush() => (); | |
| 21 | |
| 22 // Starts rendering from |time_usec|. | |
| 23 StartPlayingFrom(int64 time_usec); | |
| 24 | |
| 25 // Updates the current playback rate. The default playback rate should be 1. | |
| 26 SetPlaybackRate(double playback_rate); | |
| 27 | |
| 28 // Sets the output volume. The default volume should be 1. | |
| 29 SetVolume(float volume); | |
| 30 | |
| 31 // Attaches the CDM associated with |cdm_id| to the renderer service, | |
| 32 // executing the callback with whether the CDM was successfully attached. | |
| 33 SetCdm(int32 cdm_id) => (bool success); | |
| 34 }; | |
| 35 | |
| 36 interface MediaRendererClient { | |
| 37 // Called to report media time advancement by |time_usec|. | |
| 38 // |time_usec| and |max_time_usec| can be used to interpolate time between | |
| 39 // calls to OnTimeUpdate(). | |
| 40 // |max_time_usec| is typically the media timestamp of the last audio frame | |
| 41 // buffered by the audio hardware. | |
| 42 // |max_time_usec| must be greater or equal to |time_usec|. | |
| 43 OnTimeUpdate(int64 time_usec, int64 max_time_usec); | |
| 44 | |
| 45 // Called to report buffering state changes, see media_types.mojom. | |
| 46 OnBufferingStateChange(BufferingState state); | |
| 47 | |
| 48 // Executed when rendering has reached the end of stream. | |
| 49 OnEnded(); | |
| 50 | |
| 51 // Executed if any error was encountered during decode or rendering. If | |
| 52 // this error happens during an operation that has a completion callback, | |
| 53 // OnError() will be called before firing the completion callback. | |
| 54 OnError(); | |
| 55 }; | |
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