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Added SDL_HINT_AUDIO_DISK_INPUT_FILE, SDL_HINT_AUDIO_DISK_OUTPUT_FILE, and SDL_HINT_AUDIO_DISK_TIMESCALE

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This commit is contained in:
Sam Lantinga
2024-08-03 09:22:44 -07:00
parent e1ee0e748d
commit c9b2bfa7c1
3 changed files with 45 additions and 11 deletions
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20
src/audio/disk/SDL_diskaudio.c
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@@ -27,13 +27,8 @@
#include "../SDL_sysaudio.h"
#include "SDL_diskaudio.h"
// !!! FIXME: these should be SDL hints, not environment variables.
// environment variables and defaults.
#define DISKENVR_OUTFILE "SDL_DISKAUDIOFILE"
#define DISKDEFAULT_OUTFILE "sdlaudio.raw"
#define DISKENVR_INFILE "SDL_DISKAUDIOFILEIN"
#define DISKDEFAULT_INFILE "sdlaudio-in.raw"
#define DISKENVR_IODELAY "SDL_DISKAUDIODELAY"
static int DISKAUDIO_WaitDevice(SDL_AudioDevice *device)
{
@@ -98,7 +93,7 @@ static void DISKAUDIO_CloseDevice(SDL_AudioDevice *device)
static const char *get_filename(const SDL_bool recording)
{
const char *devname = SDL_getenv(recording ? DISKENVR_INFILE : DISKENVR_OUTFILE);
const char *devname = SDL_GetHint(recording ? SDL_HINT_AUDIO_DISK_INPUT_FILE : SDL_HINT_AUDIO_DISK_OUTPUT_FILE);
if (!devname) {
devname = recording ? DISKDEFAULT_INFILE : DISKDEFAULT_OUTFILE;
}
@@ -109,17 +104,20 @@ static int DISKAUDIO_OpenDevice(SDL_AudioDevice *device)
{
SDL_bool recording = device->recording;
const char *fname = get_filename(recording);
const char *envr = SDL_getenv(DISKENVR_IODELAY);
device->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, sizeof(*device->hidden));
if (!device->hidden) {
return -1;
}
if (envr) {
device->hidden->io_delay = SDL_atoi(envr);
} else {
device->hidden->io_delay = ((device->sample_frames * 1000) / device->spec.freq);
device->hidden->io_delay = ((device->sample_frames * 1000) / device->spec.freq);
const char *hint = SDL_GetHint(SDL_HINT_AUDIO_DISK_TIMESCALE);
if (hint) {
double scale = SDL_atof(hint);
if (scale >= 0.0) {
device->hidden->io_delay = (Uint32)SDL_round(device->hidden->io_delay * scale);
}
}
// Open the "audio device"