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/*
* Copyright (c) 2015 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/main/acm2/rent_a_codec.h"
#include "webrtc/modules/audio_coding/main/acm2/acm_codec_database.h"
#include "webrtc/modules/audio_coding/main/acm2/acm_common_defs.h"
namespace webrtc {
namespace acm2 {
rtc::Maybe<RentACodec::CodecId> RentACodec::CodecIdByParams(
const char* payload_name,
int sampling_freq_hz,
int channels) {
return CodecIdFromIndex(
ACMCodecDB::CodecId(payload_name, sampling_freq_hz, channels));
}
rtc::Maybe<CodecInst> RentACodec::CodecInstById(CodecId codec_id) {
rtc::Maybe<int> mi = CodecIndexFromId(codec_id);
return mi ? rtc::Maybe<CodecInst>(Database()[*mi]) : rtc::Maybe<CodecInst>();
}
rtc::Maybe<CodecInst> RentACodec::CodecInstByParams(const char* payload_name,
int sampling_freq_hz,
int channels) {
rtc::Maybe<CodecId> codec_id =
CodecIdByParams(payload_name, sampling_freq_hz, channels);
if (!codec_id)
return rtc::Maybe<CodecInst>();
rtc::Maybe<CodecInst> ci = CodecInstById(*codec_id);
RTC_DCHECK(ci);
// Keep the number of channels from the function call. For most codecs it
// will be the same value as in default codec settings, but not for all.
ci->channels = channels;
return ci;
}
bool RentACodec::IsCodecValid(const CodecInst& codec_inst) {
return ACMCodecDB::CodecNumber(codec_inst) >= 0;
}
rtc::ArrayView<const CodecInst> RentACodec::Database() {
return rtc::ArrayView<const CodecInst>(ACMCodecDB::database_,
NumberOfCodecs());
}
rtc::Maybe<NetEqDecoder> RentACodec::NetEqDecoderFromCodecId(CodecId codec_id,
int num_channels) {
rtc::Maybe<int> i = CodecIndexFromId(codec_id);
if (!i)
return rtc::Maybe<NetEqDecoder>();
const NetEqDecoder ned = ACMCodecDB::neteq_decoders_[*i];
return (ned == NetEqDecoder::kDecoderOpus && num_channels == 2)
? NetEqDecoder::kDecoderOpus_2ch
: ned;
}
} // namespace acm2
} // namespace webrtc
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