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67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
/***
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This file is part of snapcast
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Copyright (C) 2014-2019 Johannes Pohl
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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 "pcmEncoder.h"
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#include "common/endian.hpp"
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#include <memory>
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#define ID_RIFF 0x46464952
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#define ID_WAVE 0x45564157
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#define ID_FMT 0x20746d66
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#define ID_DATA 0x61746164
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PcmEncoder::PcmEncoder(const std::string& codecOptions) : Encoder(codecOptions)
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{
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headerChunk_.reset(new msg::CodecHeader("pcm"));
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}
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void PcmEncoder::encode(const msg::PcmChunk* chunk)
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{
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msg::PcmChunk* pcmChunk = new msg::PcmChunk(*chunk);
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listener_->onChunkEncoded(this, pcmChunk, pcmChunk->duration<chronos::msec>().count());
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}
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void PcmEncoder::initEncoder()
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{
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headerChunk_->payloadSize = 44;
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headerChunk_->payload = (char*)malloc(headerChunk_->payloadSize);
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char* payload = headerChunk_->payload;
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assign(payload, SWAP_32(ID_RIFF));
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assign(payload + 4, SWAP_32(36));
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assign(payload + 8, SWAP_32(ID_WAVE));
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assign(payload + 12, SWAP_32(ID_FMT));
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assign(payload + 16, SWAP_32(16));
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assign(payload + 20, SWAP_16(1));
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assign(payload + 22, SWAP_16(sampleFormat_.channels));
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assign(payload + 24, SWAP_32(sampleFormat_.rate));
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assign(payload + 28, SWAP_32(sampleFormat_.rate * sampleFormat_.bits * sampleFormat_.channels / 8));
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assign(payload + 32, SWAP_16(sampleFormat_.channels * ((sampleFormat_.bits + 7) / 8)));
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assign(payload + 34, SWAP_16(sampleFormat_.bits));
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assign(payload + 36, SWAP_32(ID_DATA));
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assign(payload + 40, SWAP_32(0));
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}
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std::string PcmEncoder::name() const
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{
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return "pcm";
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}
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