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71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/***
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This file is part of snapcast
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Copyright (C) 2015 Hannes Ellinger
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "opus_decoder.hpp"
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#include "common/aixlog.hpp"
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OpusDecoder::OpusDecoder() : Decoder()
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{
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int error;
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dec_ = opus_decoder_create(48000, 2, &error); // fixme
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if (error != 0)
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{
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LOG(ERROR) << "Failed to initialize opus decoder: " << error << '\n' << " Rate: " << 48000 << '\n' << " Channels: " << 2 << '\n';
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}
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}
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OpusDecoder::~OpusDecoder()
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{
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if (dec_ != nullptr)
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opus_decoder_destroy(dec_);
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}
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bool OpusDecoder::decode(msg::PcmChunk* chunk)
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{
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size_t samples = 480;
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// reserve space for decoded audio
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if (pcm_.size() < samples * 2)
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pcm_.resize(samples * 2);
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// decode
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int frame_size = opus_decode(dec_, (unsigned char*)chunk->payload, chunk->payloadSize, pcm_.data(), samples, 0);
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if (frame_size < 0)
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{
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LOG(ERROR) << "Failed to decode chunk: " << frame_size << '\n' << " IN size: " << chunk->payloadSize << '\n' << " OUT size: " << samples * 4 << '\n';
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return false;
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}
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else
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{
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LOG(DEBUG) << "Decoded chunk: size " << chunk->payloadSize << " bytes, decoded " << frame_size << " bytes" << '\n';
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// copy encoded data to chunk
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chunk->payloadSize = samples * 4;
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chunk->payload = (char*)realloc(chunk->payload, chunk->payloadSize);
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memcpy(chunk->payload, (char*)pcm_.data(), samples * 4);
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return true;
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}
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}
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SampleFormat OpusDecoder::setHeader(msg::CodecHeader* /*chunk*/)
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{
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return {48000, 16, 2};
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}
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