mirror of
https://github.com/badaix/snapcast.git
synced 2025-04-28 17:57:05 +02:00
92 lines
2.6 KiB
C++
92 lines
2.6 KiB
C++
/***
|
|
This file is part of snapcast
|
|
Copyright (C) 2014-2021 Johannes Pohl
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
// prototype/interface header file
|
|
#include "pcm_encoder.hpp"
|
|
|
|
// local headers
|
|
#include "common/aixlog.hpp"
|
|
#include "common/endian.hpp"
|
|
|
|
// standard headers
|
|
#include <memory>
|
|
|
|
|
|
namespace encoder
|
|
{
|
|
|
|
static constexpr auto ID_RIFF = 0x46464952;
|
|
static constexpr auto ID_WAVE = 0x45564157;
|
|
static constexpr auto ID_FMT = 0x20746d66;
|
|
static constexpr auto ID_DATA = 0x61746164;
|
|
|
|
static constexpr auto LOG_TAG = "PcmEnc";
|
|
|
|
namespace
|
|
{
|
|
template <typename T>
|
|
void assign(void* pointer, T val)
|
|
{
|
|
T* p = (T*)pointer;
|
|
*p = val;
|
|
}
|
|
} // namespace
|
|
|
|
|
|
PcmEncoder::PcmEncoder(const std::string& codecOptions) : Encoder(codecOptions)
|
|
{
|
|
headerChunk_.reset(new msg::CodecHeader("pcm"));
|
|
}
|
|
|
|
|
|
void PcmEncoder::encode(const msg::PcmChunk& chunk)
|
|
{
|
|
// copy the chunk into a shared_ptr
|
|
auto pcmChunk = std::make_shared<msg::PcmChunk>(chunk);
|
|
encoded_callback_(*this, pcmChunk, pcmChunk->durationMs());
|
|
}
|
|
|
|
|
|
void PcmEncoder::initEncoder()
|
|
{
|
|
LOG(INFO, LOG_TAG) << "Init\n";
|
|
headerChunk_->payloadSize = 44;
|
|
headerChunk_->payload = static_cast<char*>(realloc(headerChunk_->payload, headerChunk_->payloadSize));
|
|
char* payload = headerChunk_->payload;
|
|
assign(payload, SWAP_32(ID_RIFF));
|
|
assign(payload + 4, SWAP_32(36));
|
|
assign(payload + 8, SWAP_32(ID_WAVE));
|
|
assign(payload + 12, SWAP_32(ID_FMT));
|
|
assign(payload + 16, SWAP_32(16));
|
|
assign(payload + 20, SWAP_16(1));
|
|
assign(payload + 22, SWAP_16(sampleFormat_.channels()));
|
|
assign(payload + 24, SWAP_32(sampleFormat_.rate()));
|
|
assign(payload + 28, SWAP_32(sampleFormat_.rate() * sampleFormat_.bits() * sampleFormat_.channels() / 8));
|
|
assign(payload + 32, SWAP_16(sampleFormat_.channels() * ((sampleFormat_.bits() + 7) / 8)));
|
|
assign(payload + 34, SWAP_16(sampleFormat_.bits()));
|
|
assign(payload + 36, SWAP_32(ID_DATA));
|
|
assign(payload + 40, SWAP_32(0));
|
|
}
|
|
|
|
|
|
std::string PcmEncoder::name() const
|
|
{
|
|
return "pcm";
|
|
}
|
|
|
|
} // namespace encoder
|