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1 /* | 1 /* |
2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #include "webrtc/modules/audio_coding/neteq/tools/input_audio_file.h" | 11 #include "webrtc/modules/audio_coding/neteq/tools/input_audio_file.h" |
12 | 12 |
| 13 #include "webrtc/base/checks.h" |
| 14 |
13 namespace webrtc { | 15 namespace webrtc { |
14 namespace test { | 16 namespace test { |
15 | 17 |
16 InputAudioFile::InputAudioFile(const std::string file_name) { | 18 InputAudioFile::InputAudioFile(const std::string file_name) { |
17 fp_ = fopen(file_name.c_str(), "rb"); | 19 fp_ = fopen(file_name.c_str(), "rb"); |
18 } | 20 } |
19 | 21 |
20 InputAudioFile::~InputAudioFile() { fclose(fp_); } | 22 InputAudioFile::~InputAudioFile() { fclose(fp_); } |
21 | 23 |
22 bool InputAudioFile::Read(size_t samples, int16_t* destination) { | 24 bool InputAudioFile::Read(size_t samples, int16_t* destination) { |
23 if (!fp_) { | 25 if (!fp_) { |
24 return false; | 26 return false; |
25 } | 27 } |
26 size_t samples_read = fread(destination, sizeof(int16_t), samples, fp_); | 28 size_t samples_read = fread(destination, sizeof(int16_t), samples, fp_); |
27 if (samples_read < samples) { | 29 if (samples_read < samples) { |
28 // Rewind and read the missing samples. | 30 // Rewind and read the missing samples. |
29 rewind(fp_); | 31 rewind(fp_); |
30 size_t missing_samples = samples - samples_read; | 32 size_t missing_samples = samples - samples_read; |
31 if (fread(destination, sizeof(int16_t), missing_samples, fp_) < | 33 if (fread(destination, sizeof(int16_t), missing_samples, fp_) < |
32 missing_samples) { | 34 missing_samples) { |
33 // Could not read enough even after rewinding the file. | 35 // Could not read enough even after rewinding the file. |
34 return false; | 36 return false; |
35 } | 37 } |
36 } | 38 } |
37 return true; | 39 return true; |
38 } | 40 } |
39 | 41 |
| 42 bool InputAudioFile::Seek(int samples) { |
| 43 if (!fp_) { |
| 44 return false; |
| 45 } |
| 46 // Find file boundaries. |
| 47 const long current_pos = ftell(fp_); |
| 48 CHECK_NE(EOF, current_pos) << "Error returned when getting file position."; |
| 49 CHECK_EQ(0, fseek(fp_, 0, SEEK_END)); // Move to end of file. |
| 50 const long file_size = ftell(fp_); |
| 51 CHECK_NE(EOF, file_size) << "Error returned when getting file position."; |
| 52 // Find new position. |
| 53 long new_pos = current_pos + sizeof(int16_t) * samples; // Samples to bytes. |
| 54 CHECK_GE(new_pos, 0) << "Trying to move to before the beginning of the file"; |
| 55 new_pos = new_pos % file_size; // Wrap around the end of the file. |
| 56 // Move to new position relative to the beginning of the file. |
| 57 CHECK_EQ(0, fseek(fp_, new_pos, SEEK_SET)); |
| 58 return true; |
| 59 } |
| 60 |
40 void InputAudioFile::DuplicateInterleaved(const int16_t* source, size_t samples, | 61 void InputAudioFile::DuplicateInterleaved(const int16_t* source, size_t samples, |
41 size_t channels, | 62 size_t channels, |
42 int16_t* destination) { | 63 int16_t* destination) { |
43 // Start from the end of |source| and |destination|, and work towards the | 64 // Start from the end of |source| and |destination|, and work towards the |
44 // beginning. This is to allow in-place interleaving of the same array (i.e., | 65 // beginning. This is to allow in-place interleaving of the same array (i.e., |
45 // |source| and |destination| are the same array). | 66 // |source| and |destination| are the same array). |
46 for (int i = static_cast<int>(samples - 1); i >= 0; --i) { | 67 for (int i = static_cast<int>(samples - 1); i >= 0; --i) { |
47 for (int j = static_cast<int>(channels - 1); j >= 0; --j) { | 68 for (int j = static_cast<int>(channels - 1); j >= 0; --j) { |
48 destination[i * channels + j] = source[i]; | 69 destination[i * channels + j] = source[i]; |
49 } | 70 } |
50 } | 71 } |
51 } | 72 } |
52 | 73 |
53 } // namespace test | 74 } // namespace test |
54 } // namespace webrtc | 75 } // namespace webrtc |
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