From ea5b901bcce20949a8d1fd622a7b03ff6f56ae20 Mon Sep 17 00:00:00 2001 From: Max Kellermann Date: Thu, 23 Jan 2014 23:49:50 +0100 Subject: output/*: move to output/plugins/ --- src/output/OpenALOutputPlugin.cxx | 285 -------------------------------------- 1 file changed, 285 deletions(-) delete mode 100644 src/output/OpenALOutputPlugin.cxx (limited to 'src/output/OpenALOutputPlugin.cxx') diff --git a/src/output/OpenALOutputPlugin.cxx b/src/output/OpenALOutputPlugin.cxx deleted file mode 100644 index 52a2c9070..000000000 --- a/src/output/OpenALOutputPlugin.cxx +++ /dev/null @@ -1,285 +0,0 @@ -/* - * Copyright (C) 2003-2014 The Music Player Daemon Project - * http://www.musicpd.org - * - * 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 2 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, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include "config.h" -#include "OpenALOutputPlugin.hxx" -#include "OutputAPI.hxx" -#include "util/Error.hxx" -#include "util/Domain.hxx" - -#include - -#ifndef __APPLE__ -#include -#include -#else -#include -#include -#endif - -/* should be enough for buffer size = 2048 */ -#define NUM_BUFFERS 16 - -struct OpenALOutput { - struct audio_output base; - - const char *device_name; - ALCdevice *device; - ALCcontext *context; - ALuint buffers[NUM_BUFFERS]; - unsigned filled; - ALuint source; - ALenum format; - ALuint frequency; - - bool Initialize(const config_param ¶m, Error &error_r) { - return ao_base_init(&base, &openal_output_plugin, param, - error_r); - } - - void Deinitialize() { - ao_base_finish(&base); - } -}; - -static constexpr Domain openal_output_domain("openal_output"); - -static ALenum -openal_audio_format(AudioFormat &audio_format) -{ - /* note: cannot map SampleFormat::S8 to AL_FORMAT_STEREO8 or - AL_FORMAT_MONO8 since OpenAL expects unsigned 8 bit - samples, while MPD uses signed samples */ - - switch (audio_format.format) { - case SampleFormat::S16: - if (audio_format.channels == 2) - return AL_FORMAT_STEREO16; - if (audio_format.channels == 1) - return AL_FORMAT_MONO16; - - /* fall back to mono */ - audio_format.channels = 1; - return openal_audio_format(audio_format); - - default: - /* fall back to 16 bit */ - audio_format.format = SampleFormat::S16; - return openal_audio_format(audio_format); - } -} - -gcc_pure -static inline ALint -openal_get_source_i(const OpenALOutput *od, ALenum param) -{ - ALint value; - alGetSourcei(od->source, param, &value); - return value; -} - -gcc_pure -static inline bool -openal_has_processed(const OpenALOutput *od) -{ - return openal_get_source_i(od, AL_BUFFERS_PROCESSED) > 0; -} - -gcc_pure -static inline ALint -openal_is_playing(const OpenALOutput *od) -{ - return openal_get_source_i(od, AL_SOURCE_STATE) == AL_PLAYING; -} - -static bool -openal_setup_context(OpenALOutput *od, Error &error) -{ - od->device = alcOpenDevice(od->device_name); - - if (od->device == nullptr) { - error.Format(openal_output_domain, - "Error opening OpenAL device \"%s\"", - od->device_name); - return false; - } - - od->context = alcCreateContext(od->device, nullptr); - - if (od->context == nullptr) { - error.Format(openal_output_domain, - "Error creating context for \"%s\"", - od->device_name); - alcCloseDevice(od->device); - return false; - } - - return true; -} - -static struct audio_output * -openal_init(const config_param ¶m, Error &error) -{ - const char *device_name = param.GetBlockValue("device"); - if (device_name == nullptr) { - device_name = alcGetString(nullptr, ALC_DEFAULT_DEVICE_SPECIFIER); - } - - OpenALOutput *od = new OpenALOutput(); - if (!od->Initialize(param, error)) { - delete od; - return nullptr; - } - - od->device_name = device_name; - - return &od->base; -} - -static void -openal_finish(struct audio_output *ao) -{ - OpenALOutput *od = (OpenALOutput *)ao; - - od->Deinitialize(); - delete od; -} - -static bool -openal_open(struct audio_output *ao, AudioFormat &audio_format, - Error &error) -{ - OpenALOutput *od = (OpenALOutput *)ao; - - od->format = openal_audio_format(audio_format); - - if (!openal_setup_context(od, error)) { - return false; - } - - alcMakeContextCurrent(od->context); - alGenBuffers(NUM_BUFFERS, od->buffers); - - if (alGetError() != AL_NO_ERROR) { - error.Set(openal_output_domain, "Failed to generate buffers"); - return false; - } - - alGenSources(1, &od->source); - - if (alGetError() != AL_NO_ERROR) { - error.Set(openal_output_domain, "Failed to generate source"); - alDeleteBuffers(NUM_BUFFERS, od->buffers); - return false; - } - - od->filled = 0; - od->frequency = audio_format.sample_rate; - - return true; -} - -static void -openal_close(struct audio_output *ao) -{ - OpenALOutput *od = (OpenALOutput *)ao; - - alcMakeContextCurrent(od->context); - alDeleteSources(1, &od->source); - alDeleteBuffers(NUM_BUFFERS, od->buffers); - alcDestroyContext(od->context); - alcCloseDevice(od->device); -} - -static unsigned -openal_delay(struct audio_output *ao) -{ - OpenALOutput *od = (OpenALOutput *)ao; - - return od->filled < NUM_BUFFERS || openal_has_processed(od) - ? 0 - /* we don't know exactly how long we must wait for the - next buffer to finish, so this is a random - guess: */ - : 50; -} - -static size_t -openal_play(struct audio_output *ao, const void *chunk, size_t size, - gcc_unused Error &error) -{ - OpenALOutput *od = (OpenALOutput *)ao; - ALuint buffer; - - if (alcGetCurrentContext() != od->context) { - alcMakeContextCurrent(od->context); - } - - if (od->filled < NUM_BUFFERS) { - /* fill all buffers */ - buffer = od->buffers[od->filled]; - od->filled++; - } else { - /* wait for processed buffer */ - while (!openal_has_processed(od)) - g_usleep(10); - - alSourceUnqueueBuffers(od->source, 1, &buffer); - } - - alBufferData(buffer, od->format, chunk, size, od->frequency); - alSourceQueueBuffers(od->source, 1, &buffer); - - if (!openal_is_playing(od)) - alSourcePlay(od->source); - - return size; -} - -static void -openal_cancel(struct audio_output *ao) -{ - OpenALOutput *od = (OpenALOutput *)ao; - - od->filled = 0; - alcMakeContextCurrent(od->context); - alSourceStop(od->source); - - /* force-unqueue all buffers */ - alSourcei(od->source, AL_BUFFER, 0); - od->filled = 0; -} - -const struct audio_output_plugin openal_output_plugin = { - "openal", - nullptr, - openal_init, - openal_finish, - nullptr, - nullptr, - openal_open, - openal_close, - openal_delay, - nullptr, - openal_play, - nullptr, - openal_cancel, - nullptr, - nullptr, -}; -- cgit v1.2.3