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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 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 "media/base/audio_splicer.h" | 5 #include "media/base/audio_splicer.h" |
| 6 | 6 |
| 7 #include <cstdlib> | 7 #include <cstdlib> |
| 8 | 8 |
| 9 #include "base/logging.h" | 9 #include "base/logging.h" |
| 10 #include "media/base/audio_decoder_config.h" | 10 #include "media/base/audio_decoder_config.h" |
| (...skipping 18 matching lines...) Expand all Loading... |
| 29 AudioSplicer::~AudioSplicer() { | 29 AudioSplicer::~AudioSplicer() { |
| 30 } | 30 } |
| 31 | 31 |
| 32 void AudioSplicer::Reset() { | 32 void AudioSplicer::Reset() { |
| 33 output_timestamp_helper_.SetBaseTimestamp(kNoTimestamp()); | 33 output_timestamp_helper_.SetBaseTimestamp(kNoTimestamp()); |
| 34 output_buffers_.clear(); | 34 output_buffers_.clear(); |
| 35 received_end_of_stream_ = false; | 35 received_end_of_stream_ = false; |
| 36 } | 36 } |
| 37 | 37 |
| 38 bool AudioSplicer::AddInput(const scoped_refptr<DataBuffer>& input){ | 38 bool AudioSplicer::AddInput(const scoped_refptr<DataBuffer>& input){ |
| 39 DCHECK(!received_end_of_stream_ || input->IsEndOfStream()); | 39 DCHECK(!received_end_of_stream_ || input->end_of_stream()); |
| 40 | 40 |
| 41 if (input->IsEndOfStream()) { | 41 if (input->end_of_stream()) { |
| 42 output_buffers_.push_back(input); | 42 output_buffers_.push_back(input); |
| 43 received_end_of_stream_ = true; | 43 received_end_of_stream_ = true; |
| 44 return true; | 44 return true; |
| 45 } | 45 } |
| 46 | 46 |
| 47 DCHECK(input->GetTimestamp() != kNoTimestamp()); | 47 DCHECK(input->timestamp() != kNoTimestamp()); |
| 48 DCHECK(input->GetDuration() > base::TimeDelta()); | 48 DCHECK(input->duration() > base::TimeDelta()); |
| 49 DCHECK_GT(input->GetDataSize(), 0); | 49 DCHECK_GT(input->data_size(), 0); |
| 50 | 50 |
| 51 if (output_timestamp_helper_.base_timestamp() == kNoTimestamp()) | 51 if (output_timestamp_helper_.base_timestamp() == kNoTimestamp()) |
| 52 output_timestamp_helper_.SetBaseTimestamp(input->GetTimestamp()); | 52 output_timestamp_helper_.SetBaseTimestamp(input->timestamp()); |
| 53 | 53 |
| 54 if (output_timestamp_helper_.base_timestamp() > input->GetTimestamp()) { | 54 if (output_timestamp_helper_.base_timestamp() > input->timestamp()) { |
| 55 DVLOG(1) << "Input timestamp is before the base timestamp."; | 55 DVLOG(1) << "Input timestamp is before the base timestamp."; |
| 56 return false; | 56 return false; |
| 57 } | 57 } |
| 58 | 58 |
| 59 base::TimeDelta timestamp = input->GetTimestamp(); | 59 base::TimeDelta timestamp = input->timestamp(); |
| 60 base::TimeDelta expected_timestamp = output_timestamp_helper_.GetTimestamp(); | 60 base::TimeDelta expected_timestamp = output_timestamp_helper_.GetTimestamp(); |
| 61 base::TimeDelta delta = timestamp - expected_timestamp; | 61 base::TimeDelta delta = timestamp - expected_timestamp; |
| 62 | 62 |
| 63 if (std::abs(delta.InMilliseconds()) > kMaxTimeDeltaInMilliseconds) { | 63 if (std::abs(delta.InMilliseconds()) > kMaxTimeDeltaInMilliseconds) { |
| 64 DVLOG(1) << "Timestamp delta too large: " << delta.InMicroseconds() << "us"; | 64 DVLOG(1) << "Timestamp delta too large: " << delta.InMicroseconds() << "us"; |
| 65 return false; | 65 return false; |
| 66 } | 66 } |
| 67 | 67 |
| 68 int bytes_to_fill = 0; | 68 int bytes_to_fill = 0; |
| 69 if (delta != base::TimeDelta()) | 69 if (delta != base::TimeDelta()) |
| 70 bytes_to_fill = output_timestamp_helper_.GetBytesToTarget(timestamp); | 70 bytes_to_fill = output_timestamp_helper_.GetBytesToTarget(timestamp); |
| 71 | 71 |
| 72 if (bytes_to_fill == 0 || std::abs(bytes_to_fill) < min_gap_size_) { | 72 if (bytes_to_fill == 0 || std::abs(bytes_to_fill) < min_gap_size_) { |
| 73 AddOutputBuffer(input); | 73 AddOutputBuffer(input); |
| 74 return true; | 74 return true; |
| 75 } | 75 } |
| 76 | 76 |
| 77 if (bytes_to_fill > 0) { | 77 if (bytes_to_fill > 0) { |
| 78 DVLOG(1) << "Gap detected @ " << expected_timestamp.InMicroseconds() | 78 DVLOG(1) << "Gap detected @ " << expected_timestamp.InMicroseconds() |
| 79 << " us: " << delta.InMicroseconds() << " us"; | 79 << " us: " << delta.InMicroseconds() << " us"; |
| 80 | 80 |
| 81 // Create a buffer with enough silence samples to fill the gap and | 81 // Create a buffer with enough silence samples to fill the gap and |
| 82 // add it to the output buffer. | 82 // add it to the output buffer. |
| 83 scoped_refptr<DataBuffer> gap = new DataBuffer(bytes_to_fill); | 83 scoped_refptr<DataBuffer> gap = new DataBuffer(bytes_to_fill); |
| 84 gap->SetDataSize(bytes_to_fill); | 84 gap->set_data_size(bytes_to_fill); |
| 85 memset(gap->GetWritableData(), 0, bytes_to_fill); | 85 memset(gap->writable_data(), 0, bytes_to_fill); |
| 86 gap->SetTimestamp(expected_timestamp); | 86 gap->set_timestamp(expected_timestamp); |
| 87 gap->SetDuration(output_timestamp_helper_.GetDuration(bytes_to_fill)); | 87 gap->set_duration(output_timestamp_helper_.GetDuration(bytes_to_fill)); |
| 88 AddOutputBuffer(gap); | 88 AddOutputBuffer(gap); |
| 89 | 89 |
| 90 // Add the input buffer now that the gap has been filled. | 90 // Add the input buffer now that the gap has been filled. |
| 91 AddOutputBuffer(input); | 91 AddOutputBuffer(input); |
| 92 return true; | 92 return true; |
| 93 } | 93 } |
| 94 | 94 |
| 95 int bytes_to_skip = -bytes_to_fill; | 95 int bytes_to_skip = -bytes_to_fill; |
| 96 | 96 |
| 97 DVLOG(1) << "Overlap detected @ " << expected_timestamp.InMicroseconds() | 97 DVLOG(1) << "Overlap detected @ " << expected_timestamp.InMicroseconds() |
| 98 << " us: " << -delta.InMicroseconds() << " us"; | 98 << " us: " << -delta.InMicroseconds() << " us"; |
| 99 | 99 |
| 100 if (input->GetDataSize() <= bytes_to_skip) { | 100 if (input->data_size() <= bytes_to_skip) { |
| 101 DVLOG(1) << "Dropping whole buffer"; | 101 DVLOG(1) << "Dropping whole buffer"; |
| 102 return true; | 102 return true; |
| 103 } | 103 } |
| 104 | 104 |
| 105 // Copy the trailing samples that do not overlap samples already output | 105 // Copy the trailing samples that do not overlap samples already output |
| 106 // into a new buffer. Add this new buffer to the output queue. | 106 // into a new buffer. Add this new buffer to the output queue. |
| 107 // | 107 // |
| 108 // TODO(acolwell): Implement a cross-fade here so the transition is less | 108 // TODO(acolwell): Implement a cross-fade here so the transition is less |
| 109 // jarring. | 109 // jarring. |
| 110 int new_buffer_size = input->GetDataSize() - bytes_to_skip; | 110 int new_buffer_size = input->data_size() - bytes_to_skip; |
| 111 | 111 |
| 112 scoped_refptr<DataBuffer> new_buffer = new DataBuffer(new_buffer_size); | 112 scoped_refptr<DataBuffer> new_buffer = new DataBuffer(new_buffer_size); |
| 113 new_buffer->SetDataSize(new_buffer_size); | 113 new_buffer->set_data_size(new_buffer_size); |
| 114 memcpy(new_buffer->GetWritableData(), | 114 memcpy(new_buffer->writable_data(), |
| 115 input->GetData() + bytes_to_skip, | 115 input->data() + bytes_to_skip, |
| 116 new_buffer_size); | 116 new_buffer_size); |
| 117 new_buffer->SetTimestamp(expected_timestamp); | 117 new_buffer->set_timestamp(expected_timestamp); |
| 118 new_buffer->SetDuration( | 118 new_buffer->set_duration( |
| 119 output_timestamp_helper_.GetDuration(new_buffer_size)); | 119 output_timestamp_helper_.GetDuration(new_buffer_size)); |
| 120 AddOutputBuffer(new_buffer); | 120 AddOutputBuffer(new_buffer); |
| 121 return true; | 121 return true; |
| 122 } | 122 } |
| 123 | 123 |
| 124 bool AudioSplicer::HasNextBuffer() const { | 124 bool AudioSplicer::HasNextBuffer() const { |
| 125 return !output_buffers_.empty(); | 125 return !output_buffers_.empty(); |
| 126 } | 126 } |
| 127 | 127 |
| 128 scoped_refptr<DataBuffer> AudioSplicer::GetNextBuffer() { | 128 scoped_refptr<DataBuffer> AudioSplicer::GetNextBuffer() { |
| 129 scoped_refptr<DataBuffer> ret = output_buffers_.front(); | 129 scoped_refptr<DataBuffer> ret = output_buffers_.front(); |
| 130 output_buffers_.pop_front(); | 130 output_buffers_.pop_front(); |
| 131 return ret; | 131 return ret; |
| 132 } | 132 } |
| 133 | 133 |
| 134 void AudioSplicer::AddOutputBuffer(const scoped_refptr<DataBuffer>& buffer) { | 134 void AudioSplicer::AddOutputBuffer(const scoped_refptr<DataBuffer>& buffer) { |
| 135 output_timestamp_helper_.AddBytes(buffer->GetDataSize()); | 135 output_timestamp_helper_.AddBytes(buffer->data_size()); |
| 136 output_buffers_.push_back(buffer); | 136 output_buffers_.push_back(buffer); |
| 137 } | 137 } |
| 138 | 138 |
| 139 } // namespace media | 139 } // namespace media |
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