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Code Issues 123 Wiki Activity

build 171202. audio subsystem: volume support, source reassignment, bug fixes

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tmj-fstate
2017-12-03 02:35:49 +01:00
parent 0f0cb4209b
commit 5645c13362
11 changed files with 122 additions and 58 deletions
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12
audiorenderer.h
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@@ -29,6 +29,8 @@ namespace audio {
// TODO: generic interface base, for implementations other than openAL
struct openal_source {
friend class openal_renderer;
// types
using buffer_sequence = std::vector<audio::buffer_handle>;
@@ -48,14 +50,14 @@ struct openal_source {
bind( sound_source *Controller, Iterator_ First, Iterator_ Last ) {
controller = Controller;
buffers.insert( std::end( buffers ), First, Last );
if( id == audio::null_resource ) {
::alGenSources( 1, &id ); }
is_multipart = ( buffers.size() > 1 );
// look up and queue assigned buffers
std::vector<ALuint> bufferids;
for( auto const buffer : buffers ) {
bufferids.emplace_back( audio::renderer.buffer( buffer ).id ); }
::alSourceQueueBuffers( id, bufferids.size(), bufferids.data() );
::alSourceRewind( id );
if( id != audio::null_resource ) {
::alSourceQueueBuffers( id, bufferids.size(), bufferids.data() );
::alSourceRewind( id ); }
return *this; }
// starts playback of queued buffers
void
@@ -88,6 +90,8 @@ private:
double update_deltatime; // time delta of most current update
float pitch_variation { 1.f }; // emitter-specific variation of the base pitch
float sound_range { 50.f }; // cached audible range of the emitted samples
glm::vec3 sound_distance; // cached distance between sound and the listener
bool is_multipart { false }; // multi-part sounds are kept alive at longer ranges
};