1 /*
2  *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
3  *
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
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #include "api/audio_codecs/L16/audio_encoder_L16.h"
12 
13 #include "common_types.h"  // NOLINT(build/include)
14 #include "modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.h"
15 #include "modules/audio_coding/codecs/pcm16b/pcm16b_common.h"
16 #include "rtc_base/numerics/safe_conversions.h"
17 #include "rtc_base/ptr_util.h"
18 
19 namespace webrtc {
20 
SdpToConfig(const SdpAudioFormat & format)21 rtc::Optional<AudioEncoderL16::Config> AudioEncoderL16::SdpToConfig(
22     const SdpAudioFormat& format) {
23   if (!rtc::IsValueInRangeForNumericType<int>(format.num_channels)) {
24     return rtc::nullopt;
25   }
26   Config config;
27   config.sample_rate_hz = format.clockrate_hz;
28   config.num_channels = rtc::dchecked_cast<int>(format.num_channels);
29   return STR_CASE_CMP(format.name.c_str(), "L16") == 0 && config.IsOk()
30              ? rtc::Optional<Config>(config)
31              : rtc::nullopt;
32 }
33 
AppendSupportedEncoders(std::vector<AudioCodecSpec> * specs)34 void AudioEncoderL16::AppendSupportedEncoders(
35     std::vector<AudioCodecSpec>* specs) {
36   Pcm16BAppendSupportedCodecSpecs(specs);
37 }
38 
QueryAudioEncoder(const AudioEncoderL16::Config & config)39 AudioCodecInfo AudioEncoderL16::QueryAudioEncoder(
40     const AudioEncoderL16::Config& config) {
41   RTC_DCHECK(config.IsOk());
42   return {config.sample_rate_hz,
43           rtc::dchecked_cast<size_t>(config.num_channels),
44           config.sample_rate_hz * config.num_channels * 16};
45 }
46 
MakeAudioEncoder(const AudioEncoderL16::Config & config,int payload_type)47 std::unique_ptr<AudioEncoder> AudioEncoderL16::MakeAudioEncoder(
48     const AudioEncoderL16::Config& config,
49     int payload_type) {
50   RTC_DCHECK(config.IsOk());
51   AudioEncoderPcm16B::Config c;
52   c.sample_rate_hz = config.sample_rate_hz;
53   c.num_channels = config.num_channels;
54   c.frame_size_ms = config.frame_size_ms;
55   c.payload_type = payload_type;
56   return rtc::MakeUnique<AudioEncoderPcm16B>(c);
57 }
58 
59 }  // namespace webrtc
60