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1 // Copyright (c) 2012 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 #ifndef MEDIA_FILTERS_VPX_VIDEO_DECODER_H_ | |
6 #define MEDIA_FILTERS_VPX_VIDEO_DECODER_H_ | |
7 | |
8 #include "base/callback.h" | |
9 #include "base/memory/ref_counted.h" | |
10 #include "media/base/demuxer_stream.h" | |
11 #include "media/base/video_decoder.h" | |
12 | |
13 struct vpx_codec_ctx; | |
14 struct vpx_image; | |
15 | |
16 namespace base { | |
17 class MessageLoopProxy; | |
18 } | |
19 | |
20 namespace media { | |
21 | |
22 class MEDIA_EXPORT VpxVideoDecoder : public VideoDecoder { | |
23 public: | |
24 explicit VpxVideoDecoder( | |
25 const scoped_refptr<base::MessageLoopProxy>& message_loop); | |
26 | |
27 // VideoDecoder implementation. | |
28 virtual void Initialize(const scoped_refptr<DemuxerStream>& stream, | |
29 const PipelineStatusCB& status_cb, | |
30 const StatisticsCB& statistics_cb) OVERRIDE; | |
31 virtual void Read(const ReadCB& read_cb) OVERRIDE; | |
32 virtual void Reset(const base::Closure& closure) OVERRIDE; | |
33 virtual void Stop(const base::Closure& closure) OVERRIDE; | |
34 | |
35 protected: | |
36 virtual ~VpxVideoDecoder(); | |
37 | |
38 private: | |
39 enum DecoderState { | |
40 kUninitialized, | |
41 kNormal, | |
42 kFlushCodec, | |
43 kDecodeFinished | |
44 }; | |
45 | |
46 // Handles (re-)initializing the decoder with a (new) config. | |
47 // Returns true when initialization was successful. | |
48 bool ConfigureDecoder(); | |
49 | |
50 void CloseDecoder(); | |
51 void ReadFromDemuxerStream(); | |
52 | |
53 // Carries out the buffer processing operation scheduled by | |
54 // DecryptOrDecodeBuffer(). | |
55 void DoDecryptOrDecodeBuffer(DemuxerStream::Status status, | |
56 const scoped_refptr<DecoderBuffer>& buffer); | |
57 | |
58 void DecodeBuffer(const scoped_refptr<DecoderBuffer>& buffer); | |
59 bool Decode(const scoped_refptr<DecoderBuffer>& buffer, | |
60 scoped_refptr<VideoFrame>* video_frame); | |
61 | |
62 // Reset decoder and call |reset_cb_|. | |
63 void DoReset(); | |
64 | |
65 void CopyVpxImageTo(const vpx_image* vpx_image, | |
66 scoped_refptr<VideoFrame>* video_frame); | |
67 | |
68 scoped_refptr<base::MessageLoopProxy> message_loop_; | |
69 | |
70 DecoderState state_; | |
71 | |
72 StatisticsCB statistics_cb_; | |
73 ReadCB read_cb_; | |
74 base::Closure reset_cb_; | |
75 | |
76 // Pointer to the demuxer stream that will feed us compressed buffers. | |
77 scoped_refptr<DemuxerStream> demuxer_stream_; | |
78 | |
79 vpx_codec_ctx* vpx_codec_; | |
80 | |
81 DISALLOW_COPY_AND_ASSIGN(VpxVideoDecoder); | |
82 }; | |
83 | |
84 } // namespace media | |
85 | |
86 #endif // MEDIA_FILTERS_VPX_VIDEO_DECODER_H_ | |
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