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WASAPI: shared mode devices support any sample rate

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Andrew Kelley 2015-08-12 18:57:34 -07:00
parent c420bf9e71
commit ba65bdb131
6 changed files with 13 additions and 9 deletions
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3
README.md
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@ -29,7 +29,7 @@ behavior on every platform.
* Supports optimal usage of each supported backend. The same API does the
right thing whether the backend has a fixed buffer size, such as on JACK and
CoreAudio, or whether it allows directly managing the buffer, such as on
ALSA or PulseAudio.
ALSA, PulseAudio, and WASAPI.
* C library. Depends only on the respective backend API libraries and libc.
Does *not* depend on libstdc++, and does *not* have exceptions, run-time type
information, or [setjmp](http://latentcontent.net/2007/12/05/libpng-worst-api-ever/).
@ -251,7 +251,6 @@ view `coverage/index.html` in a browser.
0. implement WASAPI (Windows) backend, get examples working
- list devices
- buffer duration
- raw mode
- watching
- sine wave

1
soundio/soundio.h
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@ -358,6 +358,7 @@ struct SoundIoDevice {
// are used. You may check that the current backend is PulseAudio and
// ignore these min/max values.
// For JACK and CoreAudio, buffer duration and period duration are the same.
// For WASAPI, buffer duration is unknown.
double buffer_duration_min;
double buffer_duration_max;
double buffer_duration_current;

4
src/dummy.cpp
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@ -367,8 +367,8 @@ static void set_all_device_sample_rates(SoundIoDevice *device) {
SoundIoDevicePrivate *dev = (SoundIoDevicePrivate *)device;
device->sample_rate_count = 1;
device->sample_rates = &dev->prealloc_sample_rate_range;
device->sample_rates[0].min = 8000;
device->sample_rates[0].max = 5644800;
device->sample_rates[0].min = SOUNDIO_MIN_SAMPLE_RATE;
device->sample_rates[0].max = SOUNDIO_MAX_SAMPLE_RATE;
}
static int set_all_device_channel_layouts(SoundIoDevice *device) {

4
src/pulseaudio.cpp
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@ -296,8 +296,8 @@ static void sink_info_callback(pa_context *pulse_context, const pa_sink_info *in
// some reasonable min and max values.
device->sample_rate_count = 1;
device->sample_rates = &dev->prealloc_sample_rate_range;
device->sample_rates[0].min = min(8000, device->sample_rate_current);
device->sample_rates[0].max = max(5644800, device->sample_rate_current);
device->sample_rates[0].min = min(SOUNDIO_MIN_SAMPLE_RATE, device->sample_rate_current);
device->sample_rates[0].max = max(SOUNDIO_MAX_SAMPLE_RATE, device->sample_rate_current);
device->current_format = from_pulseaudio_format(info->sample_spec);
// PulseAudio performs sample format conversion, so any PulseAudio

2
src/soundio.hpp
View file

@ -169,5 +169,7 @@ struct SoundIoDevicePrivate {
void soundio_destroy_devices_info(struct SoundIoDevicesInfo *devices_info);
static const int SOUNDIO_MIN_SAMPLE_RATE = 8000;
static const int SOUNDIO_MAX_SAMPLE_RATE = 5644800;
#endif

8
src/wasapi.cpp
View file

@ -353,11 +353,13 @@ static int refresh_devices(SoundIoPrivate *si) {
deinit_refresh_devices(&rd);
return SoundIoErrorOpeningDevice;
}
rd.device->sample_rate_current = rd.wave_format->Format.nSamplesPerSec;
// WASAPI performs resampling in shared mode, so any value is valid.
// Let's pick some reasonable min and max values.
rd.device->sample_rate_count = 1;
rd.device->sample_rates = &dev->prealloc_sample_rate_range;
rd.device->sample_rate_current = rd.wave_format->Format.nSamplesPerSec;
rd.device->sample_rates[0].min = rd.device->sample_rate_current;
rd.device->sample_rates[0].max = rd.device->sample_rate_current;
rd.device->sample_rates[0].min = min(SOUNDIO_MIN_SAMPLE_RATE, rd.device->sample_rate_current);
rd.device->sample_rates[0].max = max(SOUNDIO_MAX_SAMPLE_RATE, rd.device->sample_rate_current);
rd.device->current_format = from_wave_format_format(rd.wave_format);
rd.device->format_count = 1;