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.
5 module media.interfaces;
7 import "media/mojo/interfaces/demuxer_stream.mojom";
8 import "media/mojo/interfaces/media_types.mojom";
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(RendererClient client,
15 DemuxerStream? video) => (bool success);
17 // Discards any buffered data, executing callback when completed.
18 // NOTE: If an error occurs, RendererClient::OnError() can be called
19 // before the callback is executed.
22 // Starts rendering from |time_usec|.
23 StartPlayingFrom(int64 time_usec);
25 // Updates the current playback rate. The default playback rate should be 1.
26 SetPlaybackRate(double playback_rate);
28 // Sets the output volume. The default volume should be 1.
29 SetVolume(float volume);
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);
36 interface RendererClient {
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);
45 // Called to report buffering state changes, see media_types.mojom.
46 OnBufferingStateChange(BufferingState state);
48 // Executed when rendering has reached the end of stream.
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.