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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/bind.h" | 5 #include "base/bind.h" |
6 #include "base/callback.h" | 6 #include "base/callback.h" |
7 #include "base/threading/platform_thread.h" | 7 #include "base/threading/platform_thread.h" |
8 #include "media/base/buffers.h" | 8 #include "media/base/buffers.h" |
9 #include "media/base/callback.h" | 9 #include "media/base/callback.h" |
10 #include "media/base/filter_host.h" | 10 #include "media/base/filter_host.h" |
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32 state_(kUninitialized), | 32 state_(kUninitialized), |
33 thread_(base::kNullThreadHandle), | 33 thread_(base::kNullThreadHandle), |
34 pending_reads_(0), | 34 pending_reads_(0), |
35 pending_paint_(false), | 35 pending_paint_(false), |
36 pending_paint_with_last_available_(false), | 36 pending_paint_with_last_available_(false), |
37 playback_rate_(0) { | 37 playback_rate_(0) { |
38 } | 38 } |
39 | 39 |
40 VideoRendererBase::~VideoRendererBase() { | 40 VideoRendererBase::~VideoRendererBase() { |
41 base::AutoLock auto_lock(lock_); | 41 base::AutoLock auto_lock(lock_); |
42 DCHECK(state_ == kUninitialized || state_ == kStopped); | 42 DCHECK(state_ == kUninitialized || state_ == kStopped) << state_; |
43 } | 43 } |
44 | 44 |
45 void VideoRendererBase::Play(FilterCallback* callback) { | 45 void VideoRendererBase::Play(FilterCallback* callback) { |
46 base::AutoLock auto_lock(lock_); | 46 base::AutoLock auto_lock(lock_); |
47 DCHECK_EQ(kPrerolled, state_); | 47 DCHECK_EQ(kPrerolled, state_); |
48 scoped_ptr<FilterCallback> c(callback); | 48 scoped_ptr<FilterCallback> c(callback); |
49 state_ = kPlaying; | 49 state_ = kPlaying; |
50 callback->Run(); | 50 callback->Run(); |
51 } | 51 } |
52 | 52 |
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90 | 90 |
91 // Signal the subclass we're stopping. | 91 // Signal the subclass we're stopping. |
92 OnStop(callback); | 92 OnStop(callback); |
93 } | 93 } |
94 | 94 |
95 void VideoRendererBase::SetPlaybackRate(float playback_rate) { | 95 void VideoRendererBase::SetPlaybackRate(float playback_rate) { |
96 base::AutoLock auto_lock(lock_); | 96 base::AutoLock auto_lock(lock_); |
97 playback_rate_ = playback_rate; | 97 playback_rate_ = playback_rate; |
98 } | 98 } |
99 | 99 |
100 void VideoRendererBase::Seek(base::TimeDelta time, const FilterStatusCB& cb) { | 100 void VideoRendererBase::Seek(base::TimeDelta time, const FilterStatusCB& cb) { |
101 bool run_callback = false; | 101 bool run_callback = false; |
102 | 102 |
103 { | 103 { |
104 base::AutoLock auto_lock(lock_); | 104 base::AutoLock auto_lock(lock_); |
105 // There is a race condition between filters to receive SeekTask(). | 105 // There is a race condition between filters to receive SeekTask(). |
106 // It turns out we could receive buffer from decoder before seek() | 106 // It turns out we could receive buffer from decoder before seek() |
107 // is called on us. so we do the following: | 107 // is called on us. so we do the following: |
108 // kFlushed => ( Receive first buffer or Seek() ) => kSeeking and | 108 // kFlushed => ( Receive first buffer or Seek() ) => kSeeking and |
109 // kSeeking => ( Receive enough buffers) => kPrerolled. ) | 109 // kSeeking => ( Receive enough buffers) => kPrerolled. ) |
110 DCHECK(state_ == kPrerolled || state_ == kFlushed || state_ == kSeeking); | 110 DCHECK(state_ == kPrerolled || state_ == kFlushed || state_ == kSeeking); |
111 DCHECK(!cb.is_null()); | 111 DCHECK(!cb.is_null()); |
112 DCHECK(seek_cb_.is_null()); | 112 DCHECK(seek_cb_.is_null()); |
113 | 113 |
114 if (state_ == kPrerolled) { | 114 if (state_ == kPrerolled) { |
115 // Already get enough buffers from decoder. | 115 // Already get enough buffers from decoder. |
116 run_callback = true; | 116 run_callback = true; |
117 | |
118 } else { | 117 } else { |
119 // Otherwise we are either kFlushed or kSeeking, but without enough | 118 // Otherwise we are either kFlushed or kSeeking, but without enough |
120 // buffers we should save the callback function and call it later. | 119 // buffers we should save the callback function and call it later. |
121 state_ = kSeeking; | 120 state_ = kSeeking; |
122 seek_cb_ = cb; | 121 seek_cb_ = cb; |
123 } | 122 } |
124 | 123 |
125 seek_timestamp_ = time; | 124 seek_timestamp_ = time; |
126 ScheduleRead_Locked(); | 125 ScheduleRead_Locked(); |
127 } | 126 } |
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592 void VideoRendererBase::DoStopOrErrorFlush_Locked() { | 591 void VideoRendererBase::DoStopOrErrorFlush_Locked() { |
593 DCHECK(!pending_paint_); | 592 DCHECK(!pending_paint_); |
594 DCHECK(!pending_paint_with_last_available_); | 593 DCHECK(!pending_paint_with_last_available_); |
595 lock_.AssertAcquired(); | 594 lock_.AssertAcquired(); |
596 FlushBuffers_Locked(); | 595 FlushBuffers_Locked(); |
597 last_available_frame_ = NULL; | 596 last_available_frame_ = NULL; |
598 DCHECK_EQ(pending_reads_, 0); | 597 DCHECK_EQ(pending_reads_, 0); |
599 } | 598 } |
600 | 599 |
601 } // namespace media | 600 } // namespace media |
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