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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 #include "media/filters/audio_decoder_selector.h" | |
6 | |
7 #include "base/bind.h" | |
8 #include "base/callback_helpers.h" | |
9 #include "base/logging.h" | |
10 #include "base/message_loop_proxy.h" | |
11 #include "media/base/audio_decoder_config.h" | |
12 #include "media/base/bind_to_loop.h" | |
13 #include "media/base/demuxer_stream.h" | |
14 #include "media/base/pipeline.h" | |
15 #include "media/filters/decrypting_audio_decoder.h" | |
16 #include "media/filters/decrypting_demuxer_stream.h" | |
17 | |
18 namespace media { | |
19 | |
20 AudioDecoderSelector::AudioDecoderSelector( | |
21 const scoped_refptr<base::MessageLoopProxy>& message_loop, | |
22 const AudioDecoderList& decoders, | |
23 const SetDecryptorReadyCB& set_decryptor_ready_cb) | |
24 : message_loop_(message_loop), | |
25 decoders_(decoders), | |
26 set_decryptor_ready_cb_(set_decryptor_ready_cb), | |
27 ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) { | |
28 } | |
29 | |
30 AudioDecoderSelector::~AudioDecoderSelector() {} | |
31 | |
32 void AudioDecoderSelector::SelectAudioDecoder( | |
33 const scoped_refptr<DemuxerStream>& stream, | |
34 const StatisticsCB& statistics_cb, | |
35 const SelectDecoderCB& select_decoder_cb) { | |
36 DVLOG(2) << "SelectAudioDecoder()"; | |
37 DCHECK(message_loop_->BelongsToCurrentThread()); | |
38 DCHECK(stream); | |
39 | |
40 // Make sure the |selected_decoder_cb| on a different execution stack. | |
scherkus (not reviewing)
2012/12/14 06:39:12
s/selected/select/
I'd probably reword this to sa
xhwang
2012/12/14 07:45:06
Done.
| |
41 select_decoder_cb_ = BindToCurrentLoop(select_decoder_cb); | |
42 | |
43 const AudioDecoderConfig& config = stream->audio_decoder_config(); | |
44 if (!config.IsValidConfig()) { | |
45 DLOG(ERROR) << "Invalid audio stream config."; | |
46 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
47 return; | |
48 } | |
49 | |
50 input_stream_ = stream; | |
51 statistics_cb_ = statistics_cb; | |
52 | |
53 if (!config.is_encrypted()) { | |
54 if (decoders_.empty()) { | |
55 DLOG(ERROR) << "No audio decoder can be used to decode the input stream."; | |
56 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
57 return; | |
58 } | |
59 | |
60 InitializeNextDecoder(); | |
61 return; | |
62 } | |
63 | |
64 // This could happen if Encrypted Media Extension (EME) is not enabled. | |
65 if (set_decryptor_ready_cb_.is_null()) { | |
66 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
67 return; | |
68 } | |
69 | |
70 audio_decoder_ = new DecryptingAudioDecoder(message_loop_, | |
71 set_decryptor_ready_cb_); | |
72 | |
73 audio_decoder_->Initialize( | |
74 input_stream_, | |
75 BindToCurrentLoop(base::Bind( | |
76 &AudioDecoderSelector::DecryptingAudioDecoderInitDone, | |
77 weak_ptr_factory_.GetWeakPtr())), | |
78 statistics_cb_); | |
79 } | |
80 | |
81 void AudioDecoderSelector::DecryptingAudioDecoderInitDone( | |
82 PipelineStatus status) { | |
83 DCHECK(message_loop_->BelongsToCurrentThread()); | |
84 | |
85 if (status == PIPELINE_OK) { | |
86 decoders_.clear(); | |
87 base::ResetAndReturn(&select_decoder_cb_).Run(audio_decoder_, NULL); | |
88 return; | |
89 } | |
90 | |
91 audio_decoder_ = NULL; | |
92 | |
93 if (decoders_.empty()) { | |
94 DLOG(ERROR) << "No audio decoder can be used to decode the input stream."; | |
95 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
96 return; | |
97 } | |
98 | |
99 decrypted_stream_ = new DecryptingDemuxerStream( | |
100 message_loop_, set_decryptor_ready_cb_); | |
101 | |
102 decrypted_stream_->Initialize( | |
103 input_stream_, | |
104 BindToCurrentLoop(base::Bind( | |
105 &AudioDecoderSelector::DecryptingDemuxerStreamInitDone, | |
106 weak_ptr_factory_.GetWeakPtr()))); | |
107 } | |
108 | |
109 void AudioDecoderSelector::DecryptingDemuxerStreamInitDone( | |
110 PipelineStatus status) { | |
111 DCHECK(message_loop_->BelongsToCurrentThread()); | |
112 | |
113 if (status != PIPELINE_OK) { | |
114 decrypted_stream_ = NULL; | |
115 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
116 return; | |
117 } | |
118 | |
119 DCHECK(!decrypted_stream_->audio_decoder_config().is_encrypted()); | |
120 input_stream_ = decrypted_stream_; | |
121 InitializeNextDecoder(); | |
122 } | |
123 | |
124 void AudioDecoderSelector::InitializeNextDecoder() { | |
125 DCHECK(message_loop_->BelongsToCurrentThread()); | |
126 DCHECK(!decoders_.empty()); | |
127 | |
128 audio_decoder_ = decoders_.front(); | |
129 decoders_.pop_front(); | |
130 DCHECK(audio_decoder_); | |
131 audio_decoder_->Initialize( | |
132 input_stream_, | |
133 BindToCurrentLoop(base::Bind( | |
134 &AudioDecoderSelector::DecoderInitDone, | |
135 weak_ptr_factory_.GetWeakPtr())), | |
136 statistics_cb_); | |
137 } | |
138 | |
139 void AudioDecoderSelector::DecoderInitDone(PipelineStatus status) { | |
140 DCHECK(message_loop_->BelongsToCurrentThread()); | |
141 | |
142 if (status != PIPELINE_OK) { | |
143 if (!decoders_.empty()) | |
144 InitializeNextDecoder(); | |
145 else | |
146 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
147 return; | |
148 } | |
149 | |
150 decoders_.clear(); | |
151 base::ResetAndReturn(&select_decoder_cb_).Run(audio_decoder_, | |
152 decrypted_stream_); | |
153 } | |
154 | |
155 } // namespace media | |
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