src/audio/SDL_sysaudio.h


Log

Author Commit Date CI Message
Sam Lantinga 9130f7c3 2021-01-02T10:25:38 Updated copyright for 2021
Ozkan Sezer d2723875 2020-10-14T23:01:06 os2: integrate the port into main tree.
Sam Lantinga a8780c6a 2020-01-16T20:49:25 Updated copyright date for 2020
Sam Lantinga 723d0143 2019-06-04T17:32:15 Fixed bug 4171 - SDL_GetQueuedAudioSize is broken with WASAPI Cameron Gutman I was trying to use SDL_GetQueuedAudioSize() to ensure my audio latency didn't get too high while streaming data in from the network. If I get more than N frames of audio queued, I know that the network is giving me more data than I can play and I need to drop some to keep latency low. This doesn't work well on WASAPI out of the box, due to the addition of GetPendingBytes() to the amount of queued data. As a terrible hack, I loop 100 times calling SDL_Delay(10) and SDL_GetQueuedAudioSize() before I ever call SDL_QueueAudio() to get a "baseline" amount that I then subtract from SDL_GetQueuedAudioSize() later. However, because this value isn't actually a constant, this hack can cause SDL_GetQueuedAudioSize() - baselineSize to be < 0. This means I have no accurate way of determining how much data is actually queued in SDL's audio buffer queue. The SDL_GetQueuedAudioSize() documentation says: "This is the number of bytes that have been queued for playback with SDL_QueueAudio(), but have not yet been sent to the hardware." Yet, SDL_GetQueuedAudioSize() returns > 0 value when SDL_QueueAudio() has never been called. Based on that documentation, I believe the current behavior contradicts the documented behavior of this function and should be changed in line with Boris's patch. I understand that exposing the IAudioClient::GetCurrentPadding() value is useful, but a solution there needs to take into account what of that data is silence inserted by SDL and what is actual data queued by the user with SDL_QueueAudio(). Until that happens, I think the best approach is to remove the GetPendingBytes() call until SDL is able to keep track of queued data to make sense of it. This would make SDL_GetQueuedAudioSize() possible to use accurately with WASAPI.
Sam Lantinga f3e76ea1 2019-05-23T13:47:30 Use the OpenSL ES audio driver by default on Android, as it has the lowest latency.
Sam Lantinga 7dc92a76 2019-01-12T12:18:44 Initial Android OpenSL ES implementation, contributed by ANTA
Sam Lantinga 5e13087b 2019-01-04T22:01:14 Updated copyright for 2019
Ryan C. Gordon 04cbf132 2018-10-10T15:20:56 audio: All device names reported by SDL must be unique. This means that if you have two devices named "Soundblaster Pro" in your machine, one will be reported as "Soundblaster Pro" and the other as "Soundblaster Pro (2)". This makes it so you can't into a position where one of your devices can't be opened because another is sitting on the same name.
Sam Lantinga e3cc5b2c 2018-01-03T10:03:25 Updated copyright for 2018
Ryan C. Gordon 351d6d47 2017-12-06T12:24:32 audio: Port WASAPI to WinRT, remove XAudio2 backend. XAudio2 doesn't have capture support, so WASAPI was to replace it; the holdout was WinRT, which still needed it as its primary audio target until the WASAPI code code be made to work. The support matrix now looks like: WinXP: directsound by default, winmm as a fallback for buggy drivers. Vista+: WASAPI (directsound and winmm as fallbacks for debugging). WinRT: WASAPI
Philipp Wiesemann 4366721b 2017-07-02T22:46:00 qnx: Removed unused bootstrap declaration. QNX_bootstrap is the VideoBootStrap. QSAAUDIO_bootstrap is still there.
Ryan C. Gordon 22241ed0 2017-07-01T17:50:47 Support for QNX 7.0 (thanks, Elad!). Fixes Bugzilla #3686.
Ryan C. Gordon d9039f23 2017-06-08T13:27:58 jack: Initial shot at a JACK audio target. http://jackaudio.org/ Fixes Bugzilla #2163. (with several more commits following to improve this code.)
Ryan C. Gordon a7fc2822 2017-05-24T19:56:59 audio: rename bsd target to netbsd. Apparently this is no longer a generic BSD audio target, and hasn't been for years, so rename it for NetBSD.
Philipp Wiesemann cfcec57f 2017-02-19T21:05:09 Fixed comment.
Ryan C. Gordon 1ed41d6d 2017-02-14T03:12:09 Patched to compile on Windows.
Ryan C. Gordon e5fc93ba 2017-02-13T16:59:02 audio: Don't wrap bootstrap declarations in preprocessor macros. They are harmless and ignored if we don't actually link against them. The preprocessor checks elsewhere if they're actually used.
Ryan C. Gordon 175f1e8f 2017-02-13T16:55:00 audio: Added a ThreadDeinit() method to match ThreadInit. Not used by any targets at the moment, but will be shortly!
Ryan C. Gordon b3e8db80 2017-01-06T01:07:34 audio: rename fake_stream to work_buffer. It's more than an alternative for when the OS can't provide a DMA buffer, now.
Ryan C. Gordon 4aa9e369 2017-01-05T19:45:57 Patched to compile on some compilers.
Ryan C. Gordon 30178a9b 2017-01-05T19:29:38 audio: Added SDL_AudioStream. Non-power-of-two resampling now works!
Sam Lantinga 45b774e3 2017-01-01T18:33:28 Updated copyright for 2017
Ryan C. Gordon a0e003ee 2016-12-06T02:23:54 Refactored the audio queueing code to a generic SDL_DataQueue interface. This is not a public API (at the moment), but we will be needing this for other internal things soon.
Ryan C. Gordon 8b960d4e 2016-12-06T02:20:58 Added SDL_VARIABLE_LENGTH_ARRAY so this #ifdef is localized to one place.
Sam Lantinga 36156335 2016-11-20T21:34:54 Renaming of guard header names to quiet -Wreserved-id-macro Patch contributed by Sylvain
Sam Lantinga 57d01d7d 2016-11-13T22:57:41 Patch from Sylvain to fix clang warnings
Ryan C. Gordon f6a280ab 2016-10-07T15:13:46 audio: Don't trust audio drivers to drain pending audio. This tends to be a frequent spot where drivers hang, and the waits were often unreliable in any case. Instead, our audio thread now alerts the driver that we're done streaming audio (which currently XAudio2 uses to alert the system not to warn about the impending underflow) and then SDL_Delay()'s for a duration that's reasonable to drain the DMA buffers before closing the device.
Ryan C. Gordon 76f48acf 2016-10-07T14:35:25 audio: threading and device hang improvements. This tries to make SDL robust against device drivers that have hung up, apps don't freeze in catastrophic (but not necessarily uncommon) conditions. Now we detach the audio thread and let it clean up and don't care if it never actually runs to completion.
Sam Lantinga bac61096 2016-10-04T06:48:07 ensure SDL_AUDIODEVICEREMOVED gets sent when hotplug removes a device James Zipperer The problem I was seeing was that the the ALSA hotplug thread would call SDL_RemoveAudioDevice, but my application code was not seeing an SDL_AUDIODEVICEREMOVED event to go along with it. To fix it, I added some code into SDL_RemoveAudioDevice to call SDL_OpenedAudioDeviceDisconnected on the corresponding open audio device. There didn't appear to be a way to cross reference the handle that SDL_RemoveAudioDevice gets and the SDL_AudioDevice pointer that SDL_OpenedAudioDeviceDisconnected needs, so I ended up adding a void *handle field to struct SDL_AudioDevice so that I could do the cross reference. Is there some other way beside adding a void *handle field to the struct to get the proper information for SDL_OpenedAudioDeviceDisconnected?
Ryan C. Gordon 978df1ad 2016-08-06T03:39:15 disk audio: Implemented "capture" support, cleaned up some things.
Ryan C. Gordon 9b2a59ef 2016-08-05T02:04:48 audio: Changed OnlyHasDefaultInputDevice to OnlyHasDefaultCaptureDevice.
Ryan C. Gordon 9b647727 2016-08-05T01:44:41 audio: Clean up some CloseDevice() interface details. - It's now always called if device->hidden isn't NULL, even if OpenDevice() failed halfway through. This lets implementation code not have to clean up itself on every possible failure point; just return an error and SDL will handle it for you. - Implementations can assume this->hidden != NULL and not check for it. - implementations don't have to set this->hidden = NULL when done, because the caller is always about to free(this). - Don't reset other fields that are in a block of memory about to be free()'d. - Implementations all now free things like internal mix buffers last, after closing devices and such, to guarantee they definitely aren't in use anymore at the point of deallocation.
Ryan C. Gordon 0d0f7080 2016-08-02T13:50:21 audio: implemented higher level infrastructure for running capture devices.
Ryan C. Gordon 6d5c9c1e 2016-08-02T13:48:52 audio: Made some SDL_AudioDevice fields atomic. This makes sure they're properly communicated to the audio threads.
Ryan C. Gordon 67f2538c 2016-08-01T13:32:27 audio: changed some internal ints to be SDL_bools.
Ryan C. Gordon c754662d 2016-08-01T11:45:45 audio: Make SDL_AudioDevice::shutdown an atomic value. Just to make sure this get communicated to the audio thread properly.
Sam Lantinga 42065e78 2016-01-02T10:10:34 Updated copyright to 2016
Philipp Wiesemann 0e45984f 2015-06-21T17:33:46 Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
Sam Lantinga 2c4a6ea0 2015-05-26T06:27:46 Updated the copyright year to 2015
Ryan C. Gordon b72938c8 2015-04-20T12:22:44 Windows: Always set the system timer resolution to 1ms by default. An existing hint lets apps that don't need the timer resolution changed avoid this, to save battery, etc, but this fixes several problems in timing, audio callbacks not firing fast enough, etc. Fixes Bugzilla #2944.
Alex Szpakowski fe6c797c 2015-04-10T23:30:31 Fixed an iOS view orientation issue when SDL_GL_CreateContext or SDL_CreateRenderer is called.
Ryan C. Gordon 6c072917 2015-03-19T23:54:35 Patched to compile on gcc2.
Ryan C. Gordon 11cffe1d 2015-03-19T15:43:00 SDL_RemoveAudioDevice() should specify capture vs output. This lets us reuse values between the two categories without conflicting, etc.
Ryan C. Gordon 5cbb32ef 2015-03-19T13:27:10 Disconnected/broken/lost audio devices now continue to fire their callback. The data produced by the callback is just thrown away and the audio thread delays as if it's waiting for the hardware to drain. This lets apps that rely on their audio callback firing regularly continue to make progress to function as properly as possible in the face of disaster. Apps that want to know that the device is really gone and deal with that scenario can use the new hotplug functionality.
Ryan C. Gordon 97ff10c6 2015-03-18T10:09:23 Tweaked a couple comments, added some FIXMEs.
Ryan C. Gordon f9cfd9fa 2015-03-18T02:01:17 Bunch of reworking to how we manage audio devices. Device enumeration now happens at startup and then is managed exclusively through hotplugging instead of full redetection. The device name list now has a unique "handle" associated with each item and SDL will pass this to the backend so they don't have to figure out how a human readable name maps to real hardware for a second time. Other cleanups, fixes, improvements, plus all the audio backends updated to the new interface...largely untested at this point, though.
Ryan C. Gordon 0e02ce08 2015-03-16T02:11:39 Initial work on audio device hotplug support. This fills in the core pieces and fully implements it for Mac OS X. Most other platforms, at the moment, will report a disconnected device if it fails to write audio, but don't notice if the system's device list changed at all.
Edward Rudd b88ca1b4 2015-02-10T16:28:56 the last parameter of XChangeProperty is the number of elements.. and when the element format is 32.. the element is "long" so we have 5 long elements here. Yes this seems confusing as on mac+linux Long is either 32 or 64bits depending on the architecture, but this is how the X11 protocol is defined. Thus 5 is the correct value for the nelts here. Not 5 or 10 depending on the architecture. More info on the confusion https://bugs.freedesktop.org/show_bug.cgi?id=16802
Philipp Wiesemann b48e54aa 2015-01-26T22:00:29 Fixed bug 2802 - [patch] Fix android build compiling in wrong filesystem implementation Jonas Kulla The configure script didn't differentiate between Linux and Android, unconditionally compiling in the unix implementation of SDL_sysfilesystem.c. I'm probably one of the very few people building SDL for android using classic configure + standalone toolchain, so this has gone undetected all along.
David Ludwig 70438be2 2014-12-03T10:55:23 WinRT: fixed bug whereby SDL would override an app's default orientation WinRT apps can set a default, preferred orientation via a .appxmanifest file. SDL was overriding this on app startup, and making the app use all possible orientations (landscape and portrait). Thanks to Eric Wing for the heads up on this!
Philipp Wiesemann 9c398852 2014-11-22T22:20:40 Corrected header file documentation comment.
Pierre-Loup A. Griffais 24c86b55 2014-09-11T19:24:42 [X11] Reconcile logical keyboard state with physical state on FocusIn since the window system doesn't do it for us like other platforms. This prevents sticky keys and missed keys when going in and out of focus, for example Alt would appear to stick if switching away from an SDL app with Alt-Tab and had to be pressed again. CR: Sam
Ryan C. Gordon e5d49c20 2014-07-30T11:08:31 Added a GetPendingBytes method to the audio backend. This will (eventually) make SDL_GetQueuedAudioSize() more accurate, and thus reduce latency. Right now this isn't implemented anywhere, so we assume data fed to the audio callback is consumed by the hardware and immediately played to completion.
Ryan C. Gordon f30e120a 2014-07-22T21:41:49 Added audio device buffer queueing API.
David Ludwig 3dcb451f 2014-04-09T21:29:19 Added a README file regarding WinRT support To note, this file is currently formatted with CRLF line endings, rather than LF, to allow the file to be viewed with Notepad.
Sam Lantinga 58edac3e 2014-02-02T00:53:27 Fixed bug 2374 - Update copyright for 2014... Is it that time already??
Gabriel Jacobo f848adff 2013-11-29T10:06:08 Improve Android pause/resume behavior.
Ryan C. Gordon 7e1289af 2013-11-24T23:56:17 Make internal SDL sources include SDL_internal.h instead of SDL_config.h The new header will include SDL_config.h, but allows for other global stuff.
Gabriel Jacobo dad42067 2013-08-12T11:13:50 Fixes #2022, do not resume on Android when surfaceChanged If the app is in landscape mode and the user presses the power button, a pause is followed immediately by a surfaceChanged event because the lock screen is shown in portrait mode. This triggers a "false" resume. So, we just pause and resume following the onWindowFocusChanged events. Also, wait for SDL_APP_WILLENTERBACKGROUND and SDL_APP_DIDENTERBACKGROUND before blocking the event pump.
Sam Lantinga 1ad936eb 2013-08-11T19:56:43 Fixed bug 2027 - Full-screen appears to be broken - hang in SDL_DestroyWindow() Rainer Deyke I'm running Linux Mint 15 with the Cinnamon window manager. SDL_DestroyWindow consistently locks up for me when the window if fullscreen.