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Diffstat (limited to 'third_party/libwebrtc/api/audio_codecs/L16/audio_encoder_L16.cc')
-rw-r--r-- | third_party/libwebrtc/api/audio_codecs/L16/audio_encoder_L16.cc | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/audio_codecs/L16/audio_encoder_L16.cc b/third_party/libwebrtc/api/audio_codecs/L16/audio_encoder_L16.cc new file mode 100644 index 0000000000..20259b9ad8 --- /dev/null +++ b/third_party/libwebrtc/api/audio_codecs/L16/audio_encoder_L16.cc @@ -0,0 +1,76 @@ +/* + * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "api/audio_codecs/L16/audio_encoder_L16.h" + +#include <memory> + +#include "absl/strings/match.h" +#include "modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.h" +#include "modules/audio_coding/codecs/pcm16b/pcm16b_common.h" +#include "rtc_base/numerics/safe_conversions.h" +#include "rtc_base/numerics/safe_minmax.h" +#include "rtc_base/string_to_number.h" + +namespace webrtc { + +absl::optional<AudioEncoderL16::Config> AudioEncoderL16::SdpToConfig( + const SdpAudioFormat& format) { + if (!rtc::IsValueInRangeForNumericType<int>(format.num_channels)) { + RTC_DCHECK_NOTREACHED(); + return absl::nullopt; + } + Config config; + config.sample_rate_hz = format.clockrate_hz; + config.num_channels = rtc::dchecked_cast<int>(format.num_channels); + auto ptime_iter = format.parameters.find("ptime"); + if (ptime_iter != format.parameters.end()) { + const auto ptime = rtc::StringToNumber<int>(ptime_iter->second); + if (ptime && *ptime > 0) { + config.frame_size_ms = rtc::SafeClamp(10 * (*ptime / 10), 10, 60); + } + } + if (absl::EqualsIgnoreCase(format.name, "L16") && config.IsOk()) { + return config; + } + return absl::nullopt; +} + +void AudioEncoderL16::AppendSupportedEncoders( + std::vector<AudioCodecSpec>* specs) { + Pcm16BAppendSupportedCodecSpecs(specs); +} + +AudioCodecInfo AudioEncoderL16::QueryAudioEncoder( + const AudioEncoderL16::Config& config) { + RTC_DCHECK(config.IsOk()); + return {config.sample_rate_hz, + rtc::dchecked_cast<size_t>(config.num_channels), + config.sample_rate_hz * config.num_channels * 16}; +} + +std::unique_ptr<AudioEncoder> AudioEncoderL16::MakeAudioEncoder( + const AudioEncoderL16::Config& config, + int payload_type, + absl::optional<AudioCodecPairId> /*codec_pair_id*/, + const FieldTrialsView* field_trials) { + AudioEncoderPcm16B::Config c; + c.sample_rate_hz = config.sample_rate_hz; + c.num_channels = config.num_channels; + c.frame_size_ms = config.frame_size_ms; + c.payload_type = payload_type; + if (!config.IsOk()) { + RTC_DCHECK_NOTREACHED(); + return nullptr; + } + return std::make_unique<AudioEncoderPcm16B>(c); +} + +} // namespace webrtc |