174 lines
3.7 KiB
C++
174 lines
3.7 KiB
C++
/*
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* Copyright 2003-2017 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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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 2 of the License, or
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* (at your option) any later version.
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*
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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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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "SolarisOutputPlugin.hxx"
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#include "../OutputAPI.hxx"
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#include "../Wrapper.hxx"
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#include "system/fd_util.h"
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#include "system/Error.hxx"
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#include <sys/stropts.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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#include <errno.h>
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#ifdef __sun
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#include <sys/audio.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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#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 {
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friend struct AudioOutputWrapper<SolarisOutput>;
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AudioOutput base;
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/* configuration */
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const char *const device;
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int fd;
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explicit SolarisOutput(const ConfigBlock &block)
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:base(solaris_output_plugin, block),
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device(block.GetBlockValue("device", "/dev/audio")) {}
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public:
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static SolarisOutput *Create(EventLoop &, const ConfigBlock &block) {
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return new SolarisOutput(block);
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}
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void Open(AudioFormat &audio_format);
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void Close();
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size_t Play(const void *chunk, size_t size);
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void Cancel();
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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, flags;
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/* support only 16 bit mono/stereo for now; nothing else has
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been tested */
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audio_format.format = SampleFormat::S16;
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/* open the device in non-blocking mode */
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fd = open_cloexec(device, O_WRONLY|O_NONBLOCK, 0);
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if (fd < 0)
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throw FormatErrno("Failed to open %s",
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device);
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/* restore blocking mode */
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flags = fcntl(fd, F_GETFL);
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if (flags > 0 && (flags & O_NONBLOCK) != 0)
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fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
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/* configure the audio device */
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ret = ioctl(fd, AUDIO_GETINFO, &info);
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if (ret < 0) {
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const int e = errno;
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close(fd);
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throw MakeErrno(e, "AUDIO_GETINFO failed");
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}
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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.precision = 16;
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info.play.encoding = AUDIO_ENCODING_LINEAR;
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ret = ioctl(fd, AUDIO_SETINFO, &info);
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if (ret < 0) {
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const int e = errno;
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close(fd);
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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()
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{
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close(fd);
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}
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size_t
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SolarisOutput::Play(const void *chunk, size_t size)
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{
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ssize_t nbytes = write(fd, chunk, 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()
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{
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ioctl(fd, I_FLUSH);
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}
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typedef AudioOutputWrapper<SolarisOutput> Wrapper;
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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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&Wrapper::Init,
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&Wrapper::Finish,
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nullptr,
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nullptr,
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&Wrapper::Open,
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&Wrapper::Close,
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nullptr,
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nullptr,
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&Wrapper::Play,
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nullptr,
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&Wrapper::Cancel,
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nullptr,
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nullptr,
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};
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