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* Move Alsa device opening into the audio thread, and add in support for ↵ajwong@chromium.org2009-10-161-35/+275
| | | | | | | | | | | | | | | multi-channel audio. Moving the device opening into the audio thread will prevent browser hangs for badly behaving alsa implementations (like pulseaudio) that can hang snd_pcm_open if pulseaudiod is wedged, even if SND_PCM_NONBLOCK is requested. For multi-channel audio, device enumeration has been added to try and find a multi-channel device with a stable channel mapping. According to http://0pointer.de/blog/projects/guide-to-sound-apis.html, default should only be used with mono and stereo stream because the channel ordering is not defined by Alsa. To get a well-defined channel ordering, one must use one of the surround40, surround51, etc., device names. However, these device names do not always allow multiple opens, so a fallback scheme is implemented to use default if necessary. BUG=20945,17703 TEST=listened with built-in soundcard and USB soundcard with various other audio programs running. Review URL: http://codereview.chromium.org/275022 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@29299 0039d316-1c4b-4281-b951-d872f2087c98
* Avoid potential "NULL used as int" warnings by changing ASSERT_EQ(NULL, ...) ↵pkasting@chromium.org2009-09-291-1/+1
| | | | | | | | | to ASSERT_TRUE(... == NULL). Patch by Jacob Mandelson (see http://codereview.chromium.org/202057 ), r=me. BUG=none TEST=none git-svn-id: svn://svn.chromium.org/chrome/trunk/src@27511 0039d316-1c4b-4281-b951-d872f2087c98
* Revert "Fix a ton of compiler warnings."tony@chromium.org2009-08-281-1/+1
| | | | | | | | | | | This reverts commit r24792. TBR=estade Review URL: http://codereview.chromium.org/179028 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24796 0039d316-1c4b-4281-b951-d872f2087c98
* Fix a ton of compiler warnings.estade@chromium.org2009-08-281-1/+1
| | | | | | | | | | | | | | | Most of these are classes with virtual methods lacking virtual destructors or NULL used in non-pointer context. BUG=none TEST=app_unittests && base_unittests --gtest_filter=-ConditionVariableTest.LargeFastTaskTest patch by Jacob Mandelson <jlmjlm [at] gmail> http://codereview.chromium.org/171028/show git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24792 0039d316-1c4b-4281-b951-d872f2087c98
* Provide unplayed bytes ALSA implementation of audiohclam@chromium.org2009-08-241-1/+7
| | | | | | | | | | | | | BUG=19921 TEST=play an video track on linux, AV should be in sync. Use snd_pcm_delay() to provide the number of unplayed bytes in linux's audio implementation. This information will correct the sync problem for linux. Review URL: http://codereview.chromium.org/173288 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24163 0039d316-1c4b-4281-b951-d872f2087c98
* Providing unplayed bytes in audio hardware bufferhclam@chromium.org2009-08-241-4/+4
| | | | | | | | | | | | | | | | | BUG=20007 TEST=WinAudioTest.PCMWaveStreamPendingBytes We used to guess what is in the hardware audio buffer to perform audio sync. But due the triple buffering and other platforms has other buffering scheme we need to be able to know how many bytes are left in the hardware buffer. We provide this data via AudioCallback::OnMoreData(), so we can predict when the requested buffer will be played. Review URL: http://codereview.chromium.org/174243 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24114 0039d316-1c4b-4281-b951-d872f2087c98
* Threadsafe access to AudioSource callback. Release stream on close. Handle ↵ajwong@chromium.org2009-08-211-1/+24
| | | | | | | | | | | | | | | | | | | | error on open better. This should fix the memory leak on stream close by synchronizing the removal of the audio source callback with the signaling of a close event to both the audio source, and to the audio manager. This change also makes it possible to go from kPlaying -> kPlaying because the audio source callback can be swapped correctly. Lastly, Open() is made more robust by failing early on an error state. BUG=19860,18217 TEST=none Review URL: http://codereview.chromium.org/173168 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@23988 0039d316-1c4b-4281-b951-d872f2087c98
* Enabled mono playback support for Linux.scherkus@chromium.org2009-08-201-2/+13
| | | | | | | | | | BUG=19788 TEST=try playing any mono audio source, should just work! Review URL: http://codereview.chromium.org/173109 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@23846 0039d316-1c4b-4281-b951-d872f2087c98
* Reimplement the AlsaPcmOutputStream and fix the threading issues.ajwong@chromium.org2009-08-041-0/+379
Changes the threading model from one thread per stream to one shared thread. Also, redoes the alsa reading/buffering logic to assume an asynchronous data source, and respect the different packet sizes. The Alsa device is set to non-blocking now. State transitions are cleaned up, and the threading semantics are reworked. Now linux audio will no longer crash on shutdown, seek, pause, or tab close. This implementation does still leak though. :( The leak will be fixed in another CL. Review URL: http://codereview.chromium.org/160497 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@22414 0039d316-1c4b-4281-b951-d872f2087c98
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