151 lines
2.9 KiB
C++
151 lines
2.9 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "SolarisOutputPlugin.hxx"
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#include "../OutputAPI.hxx"
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#include "io/FileDescriptor.hxx"
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#include "lib/fmt/SystemError.hxx"
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#include <cerrno>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#if defined(__sun)
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#include <sys/audio.h>
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#include <sys/stropts.h>
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#elif defined(__NetBSD__)
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#include <sys/audioio.h>
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#else
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/* some fake declarations that allow build this plugin on systems
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other than Solaris, just to see if it compiles */
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#ifndef I_FLUSH
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#define I_FLUSH 0
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#endif
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#define AUDIO_INITINFO(v)
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#define AUDIO_GETINFO 0
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#define AUDIO_SETINFO 0
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#define AUDIO_ENCODING_LINEAR 0
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struct audio_info {
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struct {
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unsigned sample_rate, channels, precision, encoding;
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} play;
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};
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#endif
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class SolarisOutput final : AudioOutput {
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/* configuration */
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const char *const device;
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FileDescriptor fd;
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explicit SolarisOutput(const ConfigBlock &block)
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:AudioOutput(0),
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device(block.GetBlockValue("device", "/dev/audio")) {}
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public:
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static AudioOutput *Create(EventLoop &, const ConfigBlock &block) {
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return new SolarisOutput(block);
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}
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private:
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void Open(AudioFormat &audio_format) override;
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void Close() noexcept override;
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std::size_t Play(std::span<const std::byte> src) override;
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void Cancel() noexcept override;
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};
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static bool
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solaris_output_test_default_device(void)
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{
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struct stat st;
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return stat("/dev/audio", &st) == 0 && S_ISCHR(st.st_mode) &&
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access("/dev/audio", W_OK) == 0;
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}
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void
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SolarisOutput::Open(AudioFormat &audio_format)
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{
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struct audio_info info;
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int ret;
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AUDIO_INITINFO(&info);
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/* open the device in non-blocking mode */
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if (!fd.Open(device, O_WRONLY|O_NONBLOCK))
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throw FmtErrno("Failed to open {}", device);
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/* restore blocking mode */
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fd.SetBlocking();
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/* configure the audio device */
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info.play.sample_rate = audio_format.sample_rate;
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info.play.channels = audio_format.channels;
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info.play.encoding = AUDIO_ENCODING_LINEAR;
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switch (audio_format.format) {
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case SampleFormat::S8:
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info.play.precision = 8;
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break;
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case SampleFormat::S16:
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info.play.precision = 16;
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break;
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default:
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info.play.precision = 32;
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audio_format.format = SampleFormat::S32;
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break;
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}
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ret = ioctl(fd.Get(), AUDIO_SETINFO, &info);
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if (ret < 0) {
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const int e = errno;
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fd.Close();
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throw MakeErrno(e, "AUDIO_SETINFO failed");
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}
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}
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void
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SolarisOutput::Close() noexcept
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{
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fd.Close();
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}
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std::size_t
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SolarisOutput::Play(std::span<const std::byte> src)
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{
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ssize_t nbytes = fd.Write(src.data(), src.size());
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if (nbytes <= 0)
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throw MakeErrno("Write failed");
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return nbytes;
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}
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void
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SolarisOutput::Cancel() noexcept
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{
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#if defined(AUDIO_FLUSH)
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ioctl(fd.Get(), AUDIO_FLUSH);
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#elif defined(I_FLUSH)
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ioctl(fd.Get(), I_FLUSH);
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#endif
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}
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const struct AudioOutputPlugin solaris_output_plugin = {
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"solaris",
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solaris_output_test_default_device,
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&SolarisOutput::Create,
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nullptr,
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};
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