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audio: Add gain support to audio streams and logical audio devices.

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Fixes #10028.
This commit is contained in:
Ryan C. Gordon 2024-07-01 15:08:20 -04:00
parent 74cc06db1b
commit 2a8f1e11ca
10 changed files with 286 additions and 26 deletions
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35
test/testaudio.c
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@ -94,6 +94,7 @@ struct Thing
float z;
Uint8 r, g, b, a;
float progress;
float meter;
float scale;
Uint64 createticks;
Texture *texture;
@ -103,6 +104,7 @@ struct Thing
void (*ondrag)(Thing *thing, int button, float x, float y);
void (*ondrop)(Thing *thing, int button, float x, float y);
void (*ondraw)(Thing *thing, SDL_Renderer *renderer);
void (*onmousewheel)(Thing *thing, float y);
Thing *prev;
Thing *next;
@ -355,6 +357,16 @@ static void DrawOneThing(SDL_Renderer *renderer, Thing *thing)
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 128);
SDL_RenderFillRect(renderer, &r);
}
if (thing->meter > 0.0f) {
SDL_FRect r;
r.w = 10.0f;
r.h = thing->rect.h * ((thing->meter > 1.0f) ? 1.0f : thing->meter);
r.x = thing->rect.x + thing->rect.w + 2.0f;
r.y = (thing->rect.y + thing->rect.h) - r.h;
SDL_SetRenderDrawColor(renderer, 255, 255, 255, 128);
SDL_RenderFillRect(renderer, &r);
}
}
static void DrawThings(SDL_Renderer *renderer)
@ -581,6 +593,13 @@ static void StreamThing_ondrop(Thing *thing, int button, float x, float y)
}
}
static void StreamThing_onmousewheel(Thing *thing, float y)
{
thing->meter += y * 0.01f;
thing->meter = SDL_clamp(thing->meter, 0.0f, 1.0f);
SDL_SetAudioStreamGain(thing->data.stream.stream, thing->meter);
}
static void StreamThing_ondraw(Thing *thing, SDL_Renderer *renderer)
{
if (thing->line_connected_to) { /* are we playing? Update progress bar, and bounce the levels a little. */
@ -618,7 +637,9 @@ static Thing *CreateStreamThing(const SDL_AudioSpec *spec, const Uint8 *buf, con
thing->ondrag = StreamThing_ondrag;
thing->ondrop = StreamThing_ondrop;
thing->ondraw = StreamThing_ondraw;
thing->onmousewheel = StreamThing_onmousewheel;
thing->can_be_dropped_onto = can_be_dropped_onto;
thing->meter = 1.0f; /* gain. */
}
return thing;
}
@ -898,6 +919,13 @@ static void LogicalDeviceThing_ondraw(Thing *thing, SDL_Renderer *renderer)
}
}
static void LogicalDeviceThing_onmousewheel(Thing *thing, float y)
{
thing->meter += y * 0.01f;
thing->meter = SDL_clamp(thing->meter, 0.0f, 1.0f);
SDL_SetAudioDeviceGain(thing->data.logdev.devid, thing->meter);
}
static Thing *CreateLogicalDeviceThing(Thing *parent, const SDL_AudioDeviceID which, const float x, const float y)
{
static const ThingType can_be_dropped_onto[] = { THING_TRASHCAN, THING_NULL };
@ -917,10 +945,12 @@ static Thing *CreateLogicalDeviceThing(Thing *parent, const SDL_AudioDeviceID wh
SDL_SetTextureBlendMode(thing->data.logdev.visualizer, SDL_BLENDMODE_BLEND);
}
thing->line_connected_to = physthing;
thing->meter = 1.0f;
thing->ontick = LogicalDeviceThing_ontick;
thing->ondrag = DeviceThing_ondrag;
thing->ondrop = LogicalDeviceThing_ondrop;
thing->ondraw = LogicalDeviceThing_ondraw;
thing->onmousewheel = LogicalDeviceThing_onmousewheel;
thing->can_be_dropped_onto = can_be_dropped_onto;
SetLogicalDeviceTitlebar(thing);
@ -1181,7 +1211,10 @@ int SDL_AppEvent(void *appstate, const SDL_Event *event)
break;
case SDL_EVENT_MOUSE_WHEEL:
UpdateMouseOver(event->wheel.mouse_x, event->wheel.mouse_y);
thing = UpdateMouseOver(event->wheel.mouse_x, event->wheel.mouse_y);
if (thing && thing->onmousewheel) {
thing->onmousewheel(thing, event->wheel.y * ((event->wheel.direction == SDL_MOUSEWHEEL_FLIPPED) ? -1.0f : 1.0f));
}
break;
case SDL_EVENT_KEY_DOWN: