output/openal: move functions into the class
This commit is contained in:
Max Kellermann
parent
712ed555e6
commit
b28710b08c
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@ -20,6 +20,7 @@
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#include "config.h"
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#include "OpenALOutputPlugin.hxx"
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#include "../OutputAPI.hxx"
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#include "../Wrapper.hxx"
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#include "util/Error.hxx"
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#include "util/Domain.hxx"
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@ -37,6 +38,8 @@
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#define NUM_BUFFERS 16
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struct OpenALOutput {
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friend struct AudioOutputWrapper<OpenALOutput>;
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AudioOutput base;
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const char *device_name;
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@ -51,9 +54,47 @@ struct OpenALOutput {
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OpenALOutput()
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:base(openal_output_plugin) {}
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bool Initialize(const config_param ¶m, Error &error_r) {
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return base.Configure(param, error_r);
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bool Configure(const config_param ¶m, Error &error);
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static OpenALOutput *Create(const config_param ¶m, Error &error);
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bool Open(AudioFormat &audio_format, Error &error);
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void Close();
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gcc_pure
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unsigned Delay() const {
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return filled < NUM_BUFFERS || HasProcessed()
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? 0
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/* we don't know exactly how long we must wait
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for the next buffer to finish, so this is a
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random guess: */
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: 50;
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}
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size_t Play(const void *chunk, size_t size, Error &error);
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void Cancel();
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private:
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gcc_pure
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ALint GetSourceI(ALenum param) const {
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ALint value;
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alGetSourcei(source, param, &value);
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return value;
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}
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gcc_pure
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bool HasProcessed() const {
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return GetSourceI(AL_BUFFERS_PROCESSED) > 0;
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}
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gcc_pure
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bool IsPlaying() const {
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return GetSourceI(AL_SOURCE_STATE) == AL_PLAYING;
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}
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bool SetupContext(Error &error);
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};
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static constexpr Domain openal_output_domain("openal_output");
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@ -83,200 +124,154 @@ openal_audio_format(AudioFormat &audio_format)
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}
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}
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gcc_pure
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static inline ALint
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openal_get_source_i(const OpenALOutput *od, ALenum param)
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inline bool
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OpenALOutput::SetupContext(Error &error)
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{
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ALint value;
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alGetSourcei(od->source, param, &value);
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return value;
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}
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device = alcOpenDevice(device_name);
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gcc_pure
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static inline bool
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openal_has_processed(const OpenALOutput *od)
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{
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return openal_get_source_i(od, AL_BUFFERS_PROCESSED) > 0;
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}
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gcc_pure
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static inline ALint
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openal_is_playing(const OpenALOutput *od)
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{
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return openal_get_source_i(od, AL_SOURCE_STATE) == AL_PLAYING;
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}
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static bool
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openal_setup_context(OpenALOutput *od, Error &error)
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{
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od->device = alcOpenDevice(od->device_name);
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if (od->device == nullptr) {
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if (device == nullptr) {
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error.Format(openal_output_domain,
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"Error opening OpenAL device \"%s\"",
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od->device_name);
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device_name);
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return false;
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}
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od->context = alcCreateContext(od->device, nullptr);
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context = alcCreateContext(device, nullptr);
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if (od->context == nullptr) {
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if (context == nullptr) {
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error.Format(openal_output_domain,
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"Error creating context for \"%s\"",
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od->device_name);
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alcCloseDevice(od->device);
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device_name);
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alcCloseDevice(device);
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return false;
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}
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return true;
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}
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static AudioOutput *
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openal_init(const config_param ¶m, Error &error)
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inline bool
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OpenALOutput::Configure(const config_param ¶m, Error &error)
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{
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const char *device_name = param.GetBlockValue("device");
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if (device_name == nullptr) {
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device_name = alcGetString(nullptr, ALC_DEFAULT_DEVICE_SPECIFIER);
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if (!base.Configure(param, error))
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return false;
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device_name = param.GetBlockValue("device");
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if (device_name == nullptr)
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device_name = alcGetString(nullptr,
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ALC_DEFAULT_DEVICE_SPECIFIER);
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return true;
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}
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OpenALOutput *od = new OpenALOutput();
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if (!od->Initialize(param, error)) {
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delete od;
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inline OpenALOutput *
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OpenALOutput::Create(const config_param ¶m, Error &error)
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{
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OpenALOutput *oo = new OpenALOutput();
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if (!oo->Configure(param, error)) {
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delete oo;
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return nullptr;
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}
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od->device_name = device_name;
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return &od->base;
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return oo;
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}
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static void
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openal_finish(AudioOutput *ao)
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inline bool
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OpenALOutput::Open(AudioFormat &audio_format, Error &error)
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{
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OpenALOutput *od = (OpenALOutput *)ao;
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format = openal_audio_format(audio_format);
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delete od;
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}
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static bool
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openal_open(AudioOutput *ao, AudioFormat &audio_format,
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Error &error)
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{
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OpenALOutput *od = (OpenALOutput *)ao;
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od->format = openal_audio_format(audio_format);
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if (!openal_setup_context(od, error)) {
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if (!SetupContext(error))
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return false;
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}
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alcMakeContextCurrent(od->context);
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alGenBuffers(NUM_BUFFERS, od->buffers);
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alcMakeContextCurrent(context);
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alGenBuffers(NUM_BUFFERS, buffers);
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if (alGetError() != AL_NO_ERROR) {
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error.Set(openal_output_domain, "Failed to generate buffers");
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return false;
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}
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alGenSources(1, &od->source);
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alGenSources(1, &source);
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if (alGetError() != AL_NO_ERROR) {
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error.Set(openal_output_domain, "Failed to generate source");
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alDeleteBuffers(NUM_BUFFERS, od->buffers);
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alDeleteBuffers(NUM_BUFFERS, buffers);
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return false;
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}
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od->filled = 0;
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od->frequency = audio_format.sample_rate;
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filled = 0;
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frequency = audio_format.sample_rate;
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return true;
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}
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static void
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openal_close(AudioOutput *ao)
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inline void
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OpenALOutput::Close()
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{
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OpenALOutput *od = (OpenALOutput *)ao;
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alcMakeContextCurrent(od->context);
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alDeleteSources(1, &od->source);
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alDeleteBuffers(NUM_BUFFERS, od->buffers);
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alcDestroyContext(od->context);
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alcCloseDevice(od->device);
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alcMakeContextCurrent(context);
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alDeleteSources(1, &source);
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alDeleteBuffers(NUM_BUFFERS, buffers);
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alcDestroyContext(context);
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alcCloseDevice(device);
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}
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static unsigned
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openal_delay(AudioOutput *ao)
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inline size_t
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OpenALOutput::Play(const void *chunk, size_t size, gcc_unused Error &error)
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{
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OpenALOutput *od = (OpenALOutput *)ao;
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if (alcGetCurrentContext() != context)
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alcMakeContextCurrent(context);
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return od->filled < NUM_BUFFERS || openal_has_processed(od)
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? 0
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/* we don't know exactly how long we must wait for the
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next buffer to finish, so this is a random
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guess: */
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: 50;
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}
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static size_t
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openal_play(AudioOutput *ao, const void *chunk, size_t size,
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gcc_unused Error &error)
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{
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OpenALOutput *od = (OpenALOutput *)ao;
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ALuint buffer;
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if (alcGetCurrentContext() != od->context) {
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alcMakeContextCurrent(od->context);
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}
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if (od->filled < NUM_BUFFERS) {
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if (filled < NUM_BUFFERS) {
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/* fill all buffers */
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buffer = od->buffers[od->filled];
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od->filled++;
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buffer = buffers[filled];
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filled++;
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} else {
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/* wait for processed buffer */
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while (!openal_has_processed(od))
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while (!HasProcessed())
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usleep(10);
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alSourceUnqueueBuffers(od->source, 1, &buffer);
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alSourceUnqueueBuffers(source, 1, &buffer);
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}
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alBufferData(buffer, od->format, chunk, size, od->frequency);
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alSourceQueueBuffers(od->source, 1, &buffer);
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alBufferData(buffer, format, chunk, size, frequency);
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alSourceQueueBuffers(source, 1, &buffer);
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if (!openal_is_playing(od))
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alSourcePlay(od->source);
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if (!IsPlaying())
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alSourcePlay(source);
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return size;
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}
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static void
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openal_cancel(AudioOutput *ao)
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inline void
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OpenALOutput::Cancel()
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{
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OpenALOutput *od = (OpenALOutput *)ao;
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od->filled = 0;
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alcMakeContextCurrent(od->context);
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alSourceStop(od->source);
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filled = 0;
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alcMakeContextCurrent(context);
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alSourceStop(source);
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/* force-unqueue all buffers */
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alSourcei(od->source, AL_BUFFER, 0);
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od->filled = 0;
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alSourcei(source, AL_BUFFER, 0);
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filled = 0;
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}
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typedef AudioOutputWrapper<OpenALOutput> Wrapper;
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const struct AudioOutputPlugin openal_output_plugin = {
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"openal",
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nullptr,
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openal_init,
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openal_finish,
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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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openal_open,
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openal_close,
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openal_delay,
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&Wrapper::Open,
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&Wrapper::Close,
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&Wrapper::Delay,
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nullptr,
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openal_play,
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&Wrapper::Play,
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nullptr,
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openal_cancel,
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&Wrapper::Cancel,
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nullptr,
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nullptr,
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};
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