OLD | NEW |
---|---|
(Empty) | |
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& clear_decoders, | |
23 const SetDecryptorReadyCB& set_decryptor_ready_cb) | |
24 : message_loop_(message_loop), | |
25 clear_decoders_(clear_decoders), | |
26 set_decryptor_ready_cb_(set_decryptor_ready_cb), | |
27 ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)), | |
28 weak_this_(weak_ptr_factory_.GetWeakPtr()) { | |
scherkus (not reviewing)
2012/12/13 23:39:07
nit: if this is created on the same thread as Sele
xhwang
2012/12/14 03:16:21
Done.
| |
29 } | |
30 | |
31 AudioDecoderSelector::~AudioDecoderSelector() {} | |
32 | |
33 void AudioDecoderSelector::SelectAudioDecoder( | |
34 const scoped_refptr<DemuxerStream>& stream, | |
35 const StatisticsCB& statistics_cb, | |
36 const SelectDecoderCB& select_decoder_cb) { | |
37 DVLOG(2) << "SelectAudioDecoder()"; | |
38 DCHECK(message_loop_->BelongsToCurrentThread()); | |
39 DCHECK(stream); | |
40 | |
41 // Make sure the |selected_decoder_cb| on a different execution stack. | |
42 select_decoder_cb_ = BindToCurrentLoop(select_decoder_cb); | |
43 | |
44 const AudioDecoderConfig& config = stream->audio_decoder_config(); | |
45 if (!config.IsValidConfig()) { | |
46 DLOG(ERROR) << "Invalid audio stream config."; | |
47 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
48 return; | |
49 } | |
50 | |
51 input_stream_ = stream; | |
scherkus (not reviewing)
2012/12/13 23:39:07
nit: your call, but I think we can be fancy here a
xhwang
2012/12/14 03:16:21
hmm, I'd keep the current way.. Passing them aroun
| |
52 statistics_cb_ = statistics_cb; | |
53 | |
54 if (!config.is_encrypted()) { | |
55 if (clear_decoders_.empty()) { | |
56 DLOG(ERROR) << "No audio decoder can be used to decode the input stream."; | |
57 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
58 return; | |
59 } | |
60 | |
61 InitializeNextClearDecoder(); | |
62 return; | |
63 } | |
64 | |
65 // This could happen if Encrypted Media Extension (EME) is not enabled. | |
66 if (set_decryptor_ready_cb_.is_null()) { | |
67 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
68 return; | |
69 } | |
70 | |
71 audio_decoder_ = new DecryptingAudioDecoder(message_loop_, | |
72 set_decryptor_ready_cb_); | |
73 | |
74 audio_decoder_->Initialize( | |
75 input_stream_, | |
76 BindToCurrentLoop(base::Bind( | |
scherkus (not reviewing)
2012/12/13 23:39:07
hmmm... we really shouldn't be so paranoid about b
xhwang
2012/12/14 03:16:21
Now FFmpegAudioDecoder and AudioDecoderImpl all ru
| |
77 &AudioDecoderSelector::DecryptingAudioDecoderInitDone, weak_this_)), | |
78 statistics_cb_); | |
79 } | |
80 | |
81 void AudioDecoderSelector::DecryptingAudioDecoderInitDone( | |
82 PipelineStatus status) { | |
83 DCHECK(message_loop_->BelongsToCurrentThread()); | |
84 | |
85 if (status == PIPELINE_OK) { | |
86 clear_decoders_.clear(); | |
87 base::ResetAndReturn(&select_decoder_cb_).Run(audio_decoder_, NULL); | |
88 return; | |
89 } | |
90 | |
91 audio_decoder_ = NULL; | |
92 | |
93 if (clear_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, weak_this_))); | |
106 } | |
107 | |
108 void AudioDecoderSelector::DecryptingDemuxerStreamInitDone( | |
109 PipelineStatus status) { | |
110 DCHECK(message_loop_->BelongsToCurrentThread()); | |
111 | |
112 if (status != PIPELINE_OK) { | |
113 decrypted_stream_ = NULL; | |
114 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
115 return; | |
116 } | |
117 | |
118 DCHECK(!decrypted_stream_->audio_decoder_config().is_encrypted()); | |
119 input_stream_ = decrypted_stream_; | |
120 InitializeNextClearDecoder(); | |
121 } | |
122 | |
123 void AudioDecoderSelector::InitializeNextClearDecoder() { | |
124 DCHECK(message_loop_->BelongsToCurrentThread()); | |
125 DCHECK(!clear_decoders_.empty()); | |
126 | |
127 audio_decoder_ = clear_decoders_.front(); | |
128 clear_decoders_.pop_front(); | |
129 DCHECK(audio_decoder_); | |
130 audio_decoder_->Initialize( | |
131 input_stream_, | |
132 BindToCurrentLoop(base::Bind( | |
133 &AudioDecoderSelector::ClearDecoderInitDone, weak_this_)), | |
134 statistics_cb_); | |
135 } | |
136 | |
137 void AudioDecoderSelector::ClearDecoderInitDone(PipelineStatus status) { | |
138 DCHECK(message_loop_->BelongsToCurrentThread()); | |
139 | |
140 if (status != PIPELINE_OK) { | |
141 if (!clear_decoders_.empty()) | |
142 InitializeNextClearDecoder(); | |
143 else | |
144 base::ResetAndReturn(&select_decoder_cb_).Run(NULL, NULL); | |
145 return; | |
146 } | |
147 | |
148 clear_decoders_.clear(); | |
149 base::ResetAndReturn(&select_decoder_cb_).Run(audio_decoder_, | |
150 decrypted_stream_); | |
151 } | |
152 | |
153 } // namespace media | |
OLD | NEW |