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1 /* | 1 /* |
2 * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2014 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/codecs/g711/include/audio_encoder_pcm.h" | 11 #include "webrtc/modules/audio_coding/codecs/g711/include/audio_encoder_pcm.h" |
12 | 12 |
13 #include <limits> | 13 #include <limits> |
14 | 14 |
15 #include "webrtc/base/checks.h" | 15 #include "webrtc/base/checks.h" |
16 #include "webrtc/common_types.h" | 16 #include "webrtc/common_types.h" |
17 #include "webrtc/modules/audio_coding/codecs/g711/include/g711_interface.h" | 17 #include "webrtc/modules/audio_coding/codecs/g711/include/g711_interface.h" |
18 | 18 |
19 namespace webrtc { | 19 namespace webrtc { |
20 | 20 |
21 namespace { | 21 namespace { |
22 | 22 |
23 int16_t NumSamplesPerFrame(int num_channels, | 23 int16_t NumSamplesPerFrame(int num_channels, |
24 int frame_size_ms, | 24 int frame_size_ms, |
25 int sample_rate_hz) { | 25 int sample_rate_hz) { |
26 int samples_per_frame = num_channels * frame_size_ms * sample_rate_hz / 1000; | 26 int samples_per_frame = num_channels * frame_size_ms * sample_rate_hz / 1000; |
27 CHECK_LE(samples_per_frame, std::numeric_limits<int16_t>::max()) | 27 RTC_CHECK_LE(samples_per_frame, std::numeric_limits<int16_t>::max()) |
28 << "Frame size too large."; | 28 << "Frame size too large."; |
29 return static_cast<int16_t>(samples_per_frame); | 29 return static_cast<int16_t>(samples_per_frame); |
30 } | 30 } |
31 | 31 |
32 template <typename T> | 32 template <typename T> |
33 typename T::Config CreateConfig(const CodecInst& codec_inst) { | 33 typename T::Config CreateConfig(const CodecInst& codec_inst) { |
34 typename T::Config config; | 34 typename T::Config config; |
35 config.frame_size_ms = codec_inst.pacsize / 8; | 35 config.frame_size_ms = codec_inst.pacsize / 8; |
36 config.num_channels = codec_inst.channels; | 36 config.num_channels = codec_inst.channels; |
37 config.payload_type = codec_inst.pltype; | 37 config.payload_type = codec_inst.pltype; |
38 return config; | 38 return config; |
39 } | 39 } |
40 | 40 |
41 } // namespace | 41 } // namespace |
42 | 42 |
43 bool AudioEncoderPcm::Config::IsOk() const { | 43 bool AudioEncoderPcm::Config::IsOk() const { |
44 return (frame_size_ms % 10 == 0) && (num_channels >= 1); | 44 return (frame_size_ms % 10 == 0) && (num_channels >= 1); |
45 } | 45 } |
46 | 46 |
47 AudioEncoderPcm::AudioEncoderPcm(const Config& config, int sample_rate_hz) | 47 AudioEncoderPcm::AudioEncoderPcm(const Config& config, int sample_rate_hz) |
48 : sample_rate_hz_(sample_rate_hz), | 48 : sample_rate_hz_(sample_rate_hz), |
49 num_channels_(config.num_channels), | 49 num_channels_(config.num_channels), |
50 payload_type_(config.payload_type), | 50 payload_type_(config.payload_type), |
51 num_10ms_frames_per_packet_( | 51 num_10ms_frames_per_packet_( |
52 static_cast<size_t>(config.frame_size_ms / 10)), | 52 static_cast<size_t>(config.frame_size_ms / 10)), |
53 full_frame_samples_(NumSamplesPerFrame(config.num_channels, | 53 full_frame_samples_(NumSamplesPerFrame(config.num_channels, |
54 config.frame_size_ms, | 54 config.frame_size_ms, |
55 sample_rate_hz_)), | 55 sample_rate_hz_)), |
56 first_timestamp_in_buffer_(0) { | 56 first_timestamp_in_buffer_(0) { |
57 CHECK_GT(sample_rate_hz, 0) << "Sample rate must be larger than 0 Hz"; | 57 RTC_CHECK_GT(sample_rate_hz, 0) << "Sample rate must be larger than 0 Hz"; |
58 CHECK_EQ(config.frame_size_ms % 10, 0) | 58 RTC_CHECK_EQ(config.frame_size_ms % 10, 0) |
59 << "Frame size must be an integer multiple of 10 ms."; | 59 << "Frame size must be an integer multiple of 10 ms."; |
60 speech_buffer_.reserve(full_frame_samples_); | 60 speech_buffer_.reserve(full_frame_samples_); |
61 } | 61 } |
62 | 62 |
63 AudioEncoderPcm::~AudioEncoderPcm() = default; | 63 AudioEncoderPcm::~AudioEncoderPcm() = default; |
64 | 64 |
65 size_t AudioEncoderPcm::MaxEncodedBytes() const { | 65 size_t AudioEncoderPcm::MaxEncodedBytes() const { |
66 return full_frame_samples_ * BytesPerSample(); | 66 return full_frame_samples_ * BytesPerSample(); |
67 } | 67 } |
68 | 68 |
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94 const int num_samples = SampleRateHz() / 100 * NumChannels(); | 94 const int num_samples = SampleRateHz() / 100 * NumChannels(); |
95 if (speech_buffer_.empty()) { | 95 if (speech_buffer_.empty()) { |
96 first_timestamp_in_buffer_ = rtp_timestamp; | 96 first_timestamp_in_buffer_ = rtp_timestamp; |
97 } | 97 } |
98 for (int i = 0; i < num_samples; ++i) { | 98 for (int i = 0; i < num_samples; ++i) { |
99 speech_buffer_.push_back(audio[i]); | 99 speech_buffer_.push_back(audio[i]); |
100 } | 100 } |
101 if (speech_buffer_.size() < full_frame_samples_) { | 101 if (speech_buffer_.size() < full_frame_samples_) { |
102 return EncodedInfo(); | 102 return EncodedInfo(); |
103 } | 103 } |
104 CHECK_EQ(speech_buffer_.size(), full_frame_samples_); | 104 RTC_CHECK_EQ(speech_buffer_.size(), full_frame_samples_); |
105 CHECK_GE(max_encoded_bytes, full_frame_samples_); | 105 RTC_CHECK_GE(max_encoded_bytes, full_frame_samples_); |
106 EncodedInfo info; | 106 EncodedInfo info; |
107 info.encoded_timestamp = first_timestamp_in_buffer_; | 107 info.encoded_timestamp = first_timestamp_in_buffer_; |
108 info.payload_type = payload_type_; | 108 info.payload_type = payload_type_; |
109 info.encoded_bytes = | 109 info.encoded_bytes = |
110 EncodeCall(&speech_buffer_[0], full_frame_samples_, encoded); | 110 EncodeCall(&speech_buffer_[0], full_frame_samples_, encoded); |
111 speech_buffer_.clear(); | 111 speech_buffer_.clear(); |
112 return info; | 112 return info; |
113 } | 113 } |
114 | 114 |
115 void AudioEncoderPcm::Reset() { | 115 void AudioEncoderPcm::Reset() { |
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136 size_t input_len, | 136 size_t input_len, |
137 uint8_t* encoded) { | 137 uint8_t* encoded) { |
138 return WebRtcG711_EncodeU(audio, input_len, encoded); | 138 return WebRtcG711_EncodeU(audio, input_len, encoded); |
139 } | 139 } |
140 | 140 |
141 int AudioEncoderPcmU::BytesPerSample() const { | 141 int AudioEncoderPcmU::BytesPerSample() const { |
142 return 1; | 142 return 1; |
143 } | 143 } |
144 | 144 |
145 } // namespace webrtc | 145 } // namespace webrtc |
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