| /* |
| * Copyright (c) 2016 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 "webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory_internal.h" |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "webrtc/common_types.h" |
| #include "webrtc/modules/audio_coding/codecs/cng/webrtc_cng.h" |
| #include "webrtc/modules/audio_coding/codecs/g711/audio_decoder_pcm.h" |
| #include "webrtc/rtc_base/checks.h" |
| #include "webrtc/rtc_base/optional.h" |
| #ifdef WEBRTC_CODEC_G722 |
| #include "webrtc/modules/audio_coding/codecs/g722/audio_decoder_g722.h" |
| #endif |
| #ifdef WEBRTC_CODEC_ILBC |
| #include "webrtc/modules/audio_coding/codecs/ilbc/audio_decoder_ilbc.h" |
| #endif |
| #ifdef WEBRTC_CODEC_ISACFX |
| #include "webrtc/modules/audio_coding/codecs/isac/fix/include/audio_decoder_isacfix.h" // nogncheck |
| #endif |
| #ifdef WEBRTC_CODEC_ISAC |
| #include "webrtc/modules/audio_coding/codecs/isac/main/include/audio_decoder_isac.h" // nogncheck |
| #endif |
| #ifdef WEBRTC_CODEC_OPUS |
| #include "webrtc/modules/audio_coding/codecs/opus/audio_decoder_opus.h" |
| #endif |
| #include "webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h" |
| |
| namespace webrtc { |
| |
| namespace { |
| |
| struct NamedDecoderConstructor { |
| const char* name; |
| |
| // If |format| is good, return true and (if |out| isn't null) reset |*out| to |
| // a new decoder object. If the |format| is not good, return false. |
| bool (*constructor)(const SdpAudioFormat& format, |
| std::unique_ptr<AudioDecoder>* out); |
| }; |
| |
| // TODO(kwiberg): These factory functions should probably be moved to each |
| // decoder. |
| NamedDecoderConstructor decoder_constructors[] = { |
| {"pcmu", |
| [](const SdpAudioFormat& format, std::unique_ptr<AudioDecoder>* out) { |
| if (format.clockrate_hz == 8000 && format.num_channels >= 1) { |
| if (out) { |
| out->reset(new AudioDecoderPcmU(format.num_channels)); |
| } |
| return true; |
| } else { |
| return false; |
| } |
| }}, |
| {"pcma", |
| [](const SdpAudioFormat& format, std::unique_ptr<AudioDecoder>* out) { |
| if (format.clockrate_hz == 8000 && format.num_channels >= 1) { |
| if (out) { |
| out->reset(new AudioDecoderPcmA(format.num_channels)); |
| } |
| return true; |
| } else { |
| return false; |
| } |
| }}, |
| #ifdef WEBRTC_CODEC_ILBC |
| {"ilbc", |
| [](const SdpAudioFormat& format, std::unique_ptr<AudioDecoder>* out) { |
| if (format.clockrate_hz == 8000 && format.num_channels == 1) { |
| if (out) { |
| out->reset(new AudioDecoderIlbcImpl); |
| } |
| return true; |
| } else { |
| return false; |
| } |
| }}, |
| #endif |
| #if defined(WEBRTC_CODEC_ISACFX) |
| {"isac", |
| [](const SdpAudioFormat& format, std::unique_ptr<AudioDecoder>* out) { |
| if (format.clockrate_hz == 16000 && format.num_channels == 1) { |
| if (out) { |
| out->reset(new AudioDecoderIsacFixImpl(format.clockrate_hz)); |
| } |
| return true; |
| } else { |
| return false; |
| } |
| }}, |
| #elif defined(WEBRTC_CODEC_ISAC) |
| {"isac", |
| [](const SdpAudioFormat& format, std::unique_ptr<AudioDecoder>* out) { |
| if ((format.clockrate_hz == 16000 || format.clockrate_hz == 32000) && |
| format.num_channels == 1) { |
| if (out) { |
| out->reset(new AudioDecoderIsacFloatImpl(format.clockrate_hz)); |
| } |
| return true; |
| } else { |
| return false; |
| } |
| }}, |
| #endif |
| {"l16", |
| [](const SdpAudioFormat& format, std::unique_ptr<AudioDecoder>* out) { |
| if (format.num_channels >= 1) { |
| if (out) { |
| out->reset(new AudioDecoderPcm16B(format.clockrate_hz, |
| format.num_channels)); |
| } |
| return true; |
| } else { |
| return false; |
| } |
| }}, |
| #ifdef WEBRTC_CODEC_G722 |
| {"g722", |
| [](const SdpAudioFormat& format, std::unique_ptr<AudioDecoder>* out) { |
| if (format.clockrate_hz == 8000) { |
| if (format.num_channels == 1) { |
| if (out) { |
| out->reset(new AudioDecoderG722Impl); |
| } |
| return true; |
| } else if (format.num_channels == 2) { |
| if (out) { |
| out->reset(new AudioDecoderG722StereoImpl); |
| } |
| return true; |
| } |
| } |
| return false; |
| }}, |
| #endif |
| #ifdef WEBRTC_CODEC_OPUS |
| {"opus", |
| [](const SdpAudioFormat& format, std::unique_ptr<AudioDecoder>* out) { |
| const rtc::Optional<int> num_channels = [&] { |
| auto stereo = format.parameters.find("stereo"); |
| if (stereo != format.parameters.end()) { |
| if (stereo->second == "0") { |
| return rtc::Optional<int>(1); |
| } else if (stereo->second == "1") { |
| return rtc::Optional<int>(2); |
| } else { |
| return rtc::Optional<int>(); // Bad stereo parameter. |
| } |
| } |
| return rtc::Optional<int>(1); // Default to mono. |
| }(); |
| if (format.clockrate_hz == 48000 && format.num_channels == 2 && |
| num_channels) { |
| if (out) { |
| out->reset(new AudioDecoderOpusImpl(*num_channels)); |
| } |
| return true; |
| } else { |
| return false; |
| } |
| }}, |
| #endif |
| }; |
| |
| class BuiltinAudioDecoderFactory : public AudioDecoderFactory { |
| public: |
| std::vector<AudioCodecSpec> GetSupportedDecoders() override { |
| // Although this looks a bit strange, it means specs need only be |
| // initialized once, and that that initialization is thread-safe. |
| static std::vector<AudioCodecSpec> specs = [] { |
| std::vector<AudioCodecSpec> specs; |
| #ifdef WEBRTC_CODEC_OPUS |
| AudioCodecInfo opus_info{48000, 1, 64000, 6000, 510000}; |
| opus_info.allow_comfort_noise = false; |
| opus_info.supports_network_adaption = true; |
| // clang-format off |
| SdpAudioFormat opus_format({"opus", 48000, 2, { |
| {"minptime", "10"}, |
| {"useinbandfec", "1"} |
| }}); |
| // clang-format on |
| specs.push_back({std::move(opus_format), opus_info}); |
| #endif |
| #if (defined(WEBRTC_CODEC_ISAC) || defined(WEBRTC_CODEC_ISACFX)) |
| specs.push_back(AudioCodecSpec{{"ISAC", 16000, 1}, |
| {16000, 1, 32000, 10000, 56000}}); |
| #endif |
| #if (defined(WEBRTC_CODEC_ISAC)) |
| specs.push_back(AudioCodecSpec{{"ISAC", 32000, 1}, |
| {32000, 1, 56000, 10000, 56000}}); |
| #endif |
| #ifdef WEBRTC_CODEC_G722 |
| specs.push_back(AudioCodecSpec{{"G722", 8000, 1}, |
| {16000, 1, 64000}}); |
| #endif |
| #ifdef WEBRTC_CODEC_ILBC |
| specs.push_back(AudioCodecSpec{{"ILBC", 8000, 1}, |
| {8000, 1, 13300}}); |
| #endif |
| specs.push_back(AudioCodecSpec{{"PCMU", 8000, 1}, |
| {8000, 1, 64000}}); |
| specs.push_back(AudioCodecSpec{{"PCMA", 8000, 1}, |
| {8000, 1, 64000}}); |
| return specs; |
| }(); |
| return specs; |
| } |
| |
| bool IsSupportedDecoder(const SdpAudioFormat& format) override { |
| for (const auto& dc : decoder_constructors) { |
| if (STR_CASE_CMP(format.name.c_str(), dc.name) == 0) { |
| return dc.constructor(format, nullptr); |
| } |
| } |
| return false; |
| } |
| |
| std::unique_ptr<AudioDecoder> MakeAudioDecoder( |
| const SdpAudioFormat& format) override { |
| for (const auto& dc : decoder_constructors) { |
| if (STR_CASE_CMP(format.name.c_str(), dc.name) == 0) { |
| std::unique_ptr<AudioDecoder> decoder; |
| bool ok = dc.constructor(format, &decoder); |
| RTC_DCHECK_EQ(ok, decoder != nullptr); |
| if (decoder) { |
| const int expected_sample_rate_hz = |
| STR_CASE_CMP(format.name.c_str(), "g722") == 0 |
| ? 2 * format.clockrate_hz |
| : format.clockrate_hz; |
| RTC_CHECK_EQ(expected_sample_rate_hz, decoder->SampleRateHz()); |
| } |
| return decoder; |
| } |
| } |
| return nullptr; |
| } |
| }; |
| |
| } // namespace |
| |
| rtc::scoped_refptr<AudioDecoderFactory> |
| CreateBuiltinAudioDecoderFactoryInternal() { |
| return rtc::scoped_refptr<AudioDecoderFactory>( |
| new rtc::RefCountedObject<BuiltinAudioDecoderFactory>); |
| } |
| |
| } // namespace webrtc |
