2009-03-13 18:43:16 +01:00
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/*
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2017-01-03 20:48:59 +01:00
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* Copyright 2003-2017 The Music Player Daemon Project
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2009-03-13 18:43:16 +01:00
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* http://www.musicpd.org
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2004-09-08 04:16:08 +02:00
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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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2009-03-13 18:43:16 +01:00
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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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2004-09-08 04:16:08 +02:00
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*/
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2009-11-12 09:12:38 +01:00
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#include "config.h"
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2013-04-17 00:56:09 +02:00
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#include "AoOutputPlugin.hxx"
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2014-01-23 23:49:50 +01:00
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#include "../OutputAPI.hxx"
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2017-01-25 10:33:27 +01:00
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#include "../Wrapper.hxx"
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2016-11-02 12:36:13 +01:00
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#include "system/Error.hxx"
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2014-12-03 21:38:06 +01:00
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#include "util/DivideString.hxx"
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2014-12-03 21:39:45 +01:00
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#include "util/SplitString.hxx"
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2016-11-02 12:36:13 +01:00
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#include "util/RuntimeError.hxx"
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2013-08-10 18:02:44 +02:00
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#include "util/Domain.hxx"
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2013-09-27 22:31:24 +02:00
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#include "Log.hxx"
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2004-09-08 04:16:08 +02:00
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#include <ao/ao.h>
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2008-11-25 16:10:01 +01:00
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2013-07-30 20:11:57 +02:00
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#include <string.h>
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2011-02-13 02:37:28 +01:00
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/* An ao_sample_format, with all fields set to zero: */
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2013-04-17 00:56:09 +02:00
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static ao_sample_format OUR_AO_FORMAT_INITIALIZER;
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2011-02-13 02:37:28 +01:00
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2009-02-25 19:08:49 +01:00
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static unsigned ao_output_ref;
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2004-09-08 04:16:08 +02:00
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2017-01-25 10:46:09 +01:00
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class AoOutput {
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friend struct AudioOutputWrapper<AoOutput>;
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2014-01-28 11:34:09 +01:00
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AudioOutput base;
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2011-09-16 23:31:48 +02:00
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2016-11-02 12:36:13 +01:00
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const size_t write_size;
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2009-02-25 19:08:49 +01:00
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int driver;
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2016-11-02 12:36:13 +01:00
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ao_option *options = nullptr;
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2006-07-20 18:02:40 +02:00
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ao_device *device;
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2013-04-17 00:56:09 +02:00
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2016-11-02 12:36:13 +01:00
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AoOutput(const ConfigBlock &block);
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2017-01-25 10:33:27 +01:00
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~AoOutput();
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2017-01-25 10:46:09 +01:00
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public:
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2017-01-25 09:47:43 +01:00
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static AoOutput *Create(EventLoop &, const ConfigBlock &block) {
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2017-01-25 10:33:27 +01:00
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return new AoOutput(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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2013-04-17 00:56:09 +02:00
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};
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2004-09-08 04:16:08 +02:00
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2013-08-10 18:02:44 +02:00
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static constexpr Domain ao_output_domain("ao_output");
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2009-02-26 22:04:59 +01:00
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2016-11-02 12:36:13 +01:00
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static std::system_error
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MakeAoError()
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2006-07-20 18:02:40 +02:00
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{
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2016-11-02 12:36:13 +01:00
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const char *error = "Unknown libao failure";
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2008-11-25 16:17:48 +01:00
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switch (errno) {
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case AO_ENODRIVER:
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error = "No such libao driver";
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break;
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case AO_ENOTLIVE:
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error = "This driver is not a libao live device";
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break;
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case AO_EBADOPTION:
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error = "Invalid libao option";
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break;
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case AO_EOPENDEVICE:
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error = "Cannot open the libao device";
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break;
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case AO_EFAIL:
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error = "Generic libao failure";
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break;
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2004-10-20 18:16:50 +02:00
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}
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2008-11-25 16:17:48 +01:00
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2016-11-02 12:36:13 +01:00
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return MakeErrno(errno, error);
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2004-10-20 18:16:50 +02:00
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}
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2016-11-02 12:36:13 +01:00
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AoOutput::AoOutput(const ConfigBlock &block)
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:base(ao_output_plugin, block),
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write_size(block.GetBlockValue("write_size", 1024u))
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2004-10-28 07:14:55 +02:00
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{
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2009-02-25 19:08:49 +01:00
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if (ao_output_ref == 0) {
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2004-10-20 18:05:13 +02:00
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ao_initialize();
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}
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2009-02-25 19:08:49 +01:00
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ao_output_ref++;
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2004-10-28 07:14:55 +02:00
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2016-11-02 12:36:13 +01:00
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const char *value = block.GetBlockValue("driver", "default");
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2009-02-26 22:04:59 +01:00
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if (0 == strcmp(value, "default"))
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2013-04-17 00:56:09 +02:00
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driver = ao_default_driver_id();
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2009-02-26 22:04:59 +01:00
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else
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2013-04-17 00:56:09 +02:00
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driver = ao_driver_id(value);
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2009-02-26 22:04:59 +01:00
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2016-11-02 12:36:13 +01:00
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if (driver < 0)
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throw FormatRuntimeError("\"%s\" is not a valid ao driver",
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value);
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2006-07-20 18:02:40 +02:00
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2013-04-17 00:56:09 +02:00
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ao_info *ai = ao_driver_info(driver);
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2016-11-02 12:36:13 +01:00
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if (ai == nullptr)
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throw std::runtime_error("problems getting driver info");
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2004-09-08 04:16:08 +02:00
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2013-09-27 22:31:24 +02:00
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FormatDebug(ao_output_domain, "using ao driver \"%s\" for \"%s\"\n",
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2015-01-21 22:13:44 +01:00
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ai->short_name, block.GetBlockValue("name", nullptr));
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2004-11-02 19:31:54 +01:00
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2015-01-21 22:13:44 +01:00
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value = block.GetBlockValue("options", nullptr);
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2013-04-17 00:56:09 +02:00
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if (value != nullptr) {
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2014-12-03 21:39:45 +01:00
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for (const auto &i : SplitString(value, ';')) {
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2014-12-04 23:05:44 +01:00
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const DivideString ss(i.c_str(), '=', true);
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2009-01-03 13:20:12 +01:00
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2016-11-02 12:36:13 +01:00
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if (!ss.IsDefined())
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throw FormatRuntimeError("problems parsing options \"%s\"",
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2014-12-03 21:39:45 +01:00
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i.c_str());
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2009-01-03 13:20:12 +01:00
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2014-12-02 22:29:41 +01:00
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ao_append_option(&options, ss.GetFirst(), ss.GetSecond());
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2004-09-08 04:16:08 +02:00
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}
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2013-04-17 00:56:09 +02:00
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}
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}
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2017-01-25 10:33:27 +01:00
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AoOutput::~AoOutput()
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2013-04-17 00:56:09 +02:00
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{
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2017-01-25 10:33:27 +01:00
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ao_free_options(options);
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2004-09-08 04:16:08 +02:00
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2009-02-25 19:08:49 +01:00
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ao_output_ref--;
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2004-09-08 04:16:08 +02:00
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2009-02-25 19:08:49 +01:00
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if (ao_output_ref == 0)
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2006-07-20 18:02:40 +02:00
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ao_shutdown();
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2004-09-08 04:16:08 +02:00
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}
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2017-01-25 10:33:27 +01:00
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void
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AoOutput::Open(AudioFormat &audio_format)
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2006-07-20 18:02:40 +02:00
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{
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2011-02-13 02:37:28 +01:00
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ao_sample_format format = OUR_AO_FORMAT_INITIALIZER;
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2004-09-08 04:16:08 +02:00
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2013-08-03 21:00:50 +02:00
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switch (audio_format.format) {
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case SampleFormat::S8:
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2009-11-10 17:11:34 +01:00
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format.bits = 8;
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break;
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2013-08-03 21:00:50 +02:00
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case SampleFormat::S16:
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2009-11-10 17:11:34 +01:00
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format.bits = 16;
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break;
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default:
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/* support for 24 bit samples in libao is currently
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dubious, and until we have sorted that out,
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convert everything to 16 bit */
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2013-08-03 21:00:50 +02:00
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audio_format.format = SampleFormat::S16;
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2009-11-10 17:11:34 +01:00
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format.bits = 16;
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break;
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}
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2008-12-09 07:39:24 +01:00
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2013-08-03 21:00:50 +02:00
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format.rate = audio_format.sample_rate;
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2004-10-20 18:05:13 +02:00
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format.byte_format = AO_FMT_NATIVE;
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2013-08-03 21:00:50 +02:00
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format.channels = audio_format.channels;
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2004-09-08 04:16:08 +02:00
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2017-01-25 10:33:27 +01:00
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device = ao_open_live(driver, &format, options);
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if (device == nullptr)
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2016-11-02 12:36:13 +01:00
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throw MakeAoError();
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2004-09-08 04:16:08 +02:00
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}
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2017-01-25 10:33:27 +01:00
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void
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AoOutput::Close()
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2004-10-20 18:05:13 +02:00
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{
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2017-01-25 10:33:27 +01:00
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ao_close(device);
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}
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2006-07-20 18:02:40 +02:00
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2017-01-25 10:33:27 +01:00
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size_t
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AoOutput::Play(const void *chunk, size_t size)
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{
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if (size > write_size)
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size = write_size;
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2004-09-08 04:16:08 +02:00
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2017-01-25 10:44:19 +01:00
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/* For whatever reason, libao wants a non-const pointer.
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Let's hope it does not write to the buffer, and use the
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union deconst hack to * work around this API misdesign. */
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char *data = const_cast<char *>((const char *)chunk);
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2017-01-25 10:33:27 +01:00
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if (ao_play(device, data, size) == 0)
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2016-11-02 12:36:13 +01:00
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throw MakeAoError();
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2004-09-08 04:16:08 +02:00
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2009-02-23 09:29:56 +01:00
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return size;
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2004-09-08 04:16:08 +02:00
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}
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2017-01-25 10:33:27 +01:00
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typedef AudioOutputWrapper<AoOutput> Wrapper;
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2014-01-28 11:22:27 +01:00
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const struct AudioOutputPlugin ao_output_plugin = {
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2013-04-17 00:56:09 +02:00
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"ao",
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nullptr,
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2017-01-25 10:33:27 +01:00
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&Wrapper::Init,
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&Wrapper::Finish,
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2013-04-17 00:56:09 +02:00
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nullptr,
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nullptr,
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2017-01-25 10:33:27 +01:00
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&Wrapper::Open,
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&Wrapper::Close,
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2013-04-17 00:56:09 +02:00
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nullptr,
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nullptr,
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2017-01-25 10:33:27 +01:00
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&Wrapper::Play,
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2013-04-17 00:56:09 +02:00
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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2004-09-08 04:16:08 +02:00
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};
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