433 lines
12 KiB
C++
433 lines
12 KiB
C++
#include "global.h"
|
|
#include "RageLog.h"
|
|
#include "RageUtil.h"
|
|
#include "ALSA9Helpers.h"
|
|
#include "SDL_utils.h"
|
|
#include "ALSA9Dynamic.h"
|
|
|
|
/* int err; must be defined before using this macro */
|
|
#define ALSA_CHECK(x) \
|
|
if ( err < 0 ) { LOG->Info("ALSA: %s: %s", x, dsnd_strerror(err)); return false; }
|
|
#define ALSA_ASSERT(x) \
|
|
if (err < 0) { LOG->Warn("ALSA: %s: %s", x, dsnd_strerror(err)); }
|
|
|
|
/* If the given sample rate can be used, return it. Otherwise, return the
|
|
* samplerate to use instead. */
|
|
unsigned Alsa9Buf::FindSampleRate( unsigned rate )
|
|
{
|
|
snd_pcm_hw_params_t *testhw;
|
|
dsnd_pcm_hw_params_alloca( &testhw );
|
|
dsnd_pcm_hw_params_any( pcm, testhw );
|
|
|
|
int err = dsnd_pcm_hw_params_set_rate_near(pcm, testhw, &rate, 0);
|
|
if( err >= 0 )
|
|
return rate;
|
|
|
|
return 0;
|
|
}
|
|
|
|
bool Alsa9Buf::SetHWParams()
|
|
{
|
|
int err;
|
|
|
|
if( dsnd_pcm_state(pcm) == SND_PCM_STATE_PREPARED )
|
|
dsnd_pcm_drop( pcm );
|
|
|
|
if( dsnd_pcm_state(pcm) != SND_PCM_STATE_OPEN )
|
|
{
|
|
/* Reset the stream to SND_PCM_STATE_OPEN. */
|
|
err = dsnd_pcm_hw_free( pcm );
|
|
ALSA_ASSERT("dsnd_pcm_hw_free");
|
|
}
|
|
// RAGE_ASSERT_M( dsnd_pcm_state(pcm) == SND_PCM_STATE_OPEN, ssprintf("(%s)", dsnd_pcm_state_name(dsnd_pcm_state(pcm))) );
|
|
|
|
/* allocate the hardware parameters structure */
|
|
snd_pcm_hw_params_t *hwparams;
|
|
dsnd_pcm_hw_params_alloca( &hwparams );
|
|
|
|
err = dsnd_pcm_hw_params_any(pcm, hwparams);
|
|
ALSA_CHECK("dsnd_pcm_hw_params_any");
|
|
|
|
/* set to mmap mode (with channels interleaved) */
|
|
err = dsnd_pcm_hw_params_set_access(pcm, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED);
|
|
ALSA_CHECK("dsnd_pcm_hw_params_set_access");
|
|
|
|
/* set PCM format (signed 16bit, little endian) */
|
|
err = dsnd_pcm_hw_params_set_format(pcm, hwparams, SND_PCM_FORMAT_S16_LE);
|
|
ALSA_CHECK("dsnd_pcm_hw_params_set_format");
|
|
|
|
/* set number of channels */
|
|
err = dsnd_pcm_hw_params_set_channels(pcm, hwparams, 2);
|
|
ALSA_CHECK("dsnd_pcm_hw_params_set_channels");
|
|
|
|
/* Set the sample rate. */
|
|
unsigned int rate = samplerate;
|
|
err = dsnd_pcm_hw_params_set_rate_near(pcm, hwparams, &rate, 0);
|
|
ALSA_CHECK("dsnd_pcm_hw_params_set_rate_near");
|
|
|
|
if( samplerate_set_explicitly && (int) rate != samplerate )
|
|
LOG->Warn("Alsa9Buf::SetHWParams: Couldn't get %ihz (got %ihz instead)", samplerate, rate);
|
|
|
|
snd_pcm_uframes_t buffersize = 1024*32;
|
|
err = dsnd_pcm_hw_params_set_buffer_size_near( pcm, hwparams, &buffersize );
|
|
ALSA_CHECK("dsnd_pcm_hw_params_set_buffer_size_near");
|
|
|
|
/* write the hardware parameters to the device */
|
|
err = dsnd_pcm_hw_params( pcm, hwparams );
|
|
ALSA_CHECK("dsnd_pcm_hw_params");
|
|
|
|
return true;
|
|
}
|
|
|
|
bool Alsa9Buf::SetSWParams()
|
|
{
|
|
snd_pcm_sw_params_t *swparams;
|
|
dsnd_pcm_sw_params_alloca( &swparams );
|
|
dsnd_pcm_sw_params_current( pcm, swparams );
|
|
|
|
int err = dsnd_pcm_sw_params_get_xfer_align( swparams, &xfer_align );
|
|
ALSA_ASSERT("dsnd_pcm_sw_params_get_xfer_align");
|
|
|
|
snd_pcm_uframes_t avail_min;
|
|
err = dsnd_pcm_sw_params_get_avail_min( swparams, &avail_min );
|
|
ALSA_ASSERT("dsnd_pcm_sw_params_get_avail_min");
|
|
|
|
/* So far, I havn't seen a case where avail_min > xfer_align. If that happens,
|
|
* the GetNumFramesToFill will need updating. */
|
|
ASSERT( avail_min <= xfer_align );
|
|
|
|
/* If this fails, we might have bound dsnd_pcm_sw_params_get_xfer_align to
|
|
* the old SW API. */
|
|
ASSERT( err <= 0 );
|
|
|
|
/* Disable SND_PCM_STATE_XRUN. */
|
|
snd_pcm_uframes_t boundary = 0;
|
|
err = dsnd_pcm_sw_params_get_boundary( swparams, &boundary );
|
|
ALSA_ASSERT("dsnd_pcm_sw_params_get_boundary");
|
|
if( err == 0 )
|
|
{
|
|
err = dsnd_pcm_sw_params_set_stop_threshold( pcm, swparams, boundary );
|
|
ALSA_ASSERT("dsnd_pcm_sw_params_set_stop_threshold");
|
|
err = dsnd_pcm_sw_params(pcm, swparams);
|
|
ALSA_ASSERT("dsnd_pcm_sw_params");
|
|
}
|
|
|
|
err = dsnd_pcm_prepare(pcm);
|
|
ALSA_ASSERT("dsnd_pcm_prepare");
|
|
|
|
return true;
|
|
}
|
|
|
|
void Alsa9Buf::ErrorHandler(const char *file, int line, const char *function, int err, const char *fmt, ...)
|
|
{
|
|
va_list va;
|
|
va_start( va, fmt );
|
|
CString str = vssprintf(fmt, va);
|
|
va_end( va );
|
|
|
|
if( err )
|
|
str += ssprintf( " (%s)", dsnd_strerror(err) );
|
|
|
|
/* Annoying: these happen both normally (eg. "out of memory" when allocating too many PCM
|
|
* slots) and abnormally, and there's no way to tell which is which. I don't want to
|
|
* pollute the warning output. */
|
|
LOG->Trace( "ALSA error: %s:%i %s: %s", file, line, function, str.c_str() );
|
|
}
|
|
|
|
void Alsa9Buf::InitializeErrorHandler()
|
|
{
|
|
dsnd_lib_error_set_handler( ErrorHandler );
|
|
}
|
|
|
|
void Alsa9Buf::GetSoundCardDebugInfo()
|
|
{
|
|
static bool done = false;
|
|
if( done )
|
|
return;
|
|
done = true;
|
|
|
|
if( DoesFileExist("/proc/asound/version") )
|
|
{
|
|
const CString ver = GetRedirContents("/proc/asound/version");
|
|
LOG->Info( "ALSA: %s", ver.c_str() );
|
|
}
|
|
|
|
InitializeErrorHandler();
|
|
|
|
int card = -1;
|
|
while( dsnd_card_next( &card ) >= 0 && card >= 0 )
|
|
{
|
|
const CString id = ssprintf( "hw:%d", card );
|
|
snd_ctl_t *handle;
|
|
int err;
|
|
err = dsnd_ctl_open( &handle, id, 0 );
|
|
if ( err < 0 )
|
|
{
|
|
LOG->Info( "Couldn't open card #%i (\"%s\") to probe: %s", card, id.c_str(), dsnd_strerror(err) );
|
|
continue;
|
|
}
|
|
|
|
snd_ctl_card_info_t *info;
|
|
dsnd_ctl_card_info_alloca(&info);
|
|
err = dsnd_ctl_card_info( handle, info );
|
|
if ( err < 0 )
|
|
{
|
|
LOG->Info( "Couldn't get card info for card #%i (\"%s\"): %s", card, id.c_str(), dsnd_strerror(err) );
|
|
dsnd_ctl_close( handle );
|
|
continue;
|
|
}
|
|
|
|
int dev = -1;
|
|
while ( dsnd_ctl_pcm_next_device( handle, &dev ) >= 0 && dev >= 0 )
|
|
{
|
|
snd_pcm_info_t *pcminfo;
|
|
dsnd_pcm_info_alloca(&pcminfo);
|
|
dsnd_pcm_info_set_device(pcminfo, dev);
|
|
dsnd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_PLAYBACK);
|
|
|
|
err = dsnd_ctl_pcm_info(handle, pcminfo);
|
|
if ( err < 0 )
|
|
{
|
|
if (err != -ENOENT)
|
|
LOG->Info("dsnd_ctl_pcm_info(%i) (%s) failed: %s", card, id.c_str(), dsnd_strerror(err));
|
|
continue;
|
|
}
|
|
|
|
LOG->Info( "ALSA Driver: %i: %s [%s], device %i: %s [%s], %i/%i subdevices avail",
|
|
card, dsnd_ctl_card_info_get_name(info), dsnd_ctl_card_info_get_id(info), dev,
|
|
dsnd_pcm_info_get_id(pcminfo), dsnd_pcm_info_get_name(pcminfo),
|
|
dsnd_pcm_info_get_subdevices_avail(pcminfo),
|
|
dsnd_pcm_info_get_subdevices_count(pcminfo) );
|
|
|
|
}
|
|
dsnd_ctl_close(handle);
|
|
}
|
|
|
|
if( card == 0 )
|
|
LOG->Info( "No ALSA sound cards were found.");
|
|
}
|
|
|
|
static CString DeviceName = "hw:0";
|
|
|
|
Alsa9Buf::Alsa9Buf( hw hardware, int channels_ )
|
|
{
|
|
GetSoundCardDebugInfo();
|
|
|
|
InitializeErrorHandler();
|
|
|
|
channels = channels_;
|
|
samplerate = 44100;
|
|
samplebits = 16;
|
|
last_cursor_pos = 0;
|
|
samplerate_set_explicitly = false;
|
|
|
|
/* Open the device. */
|
|
int err;
|
|
// err = dsnd_pcm_open( &pcm, "dmix", SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK );
|
|
err = dsnd_pcm_open( &pcm, DeviceName, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK );
|
|
if (err < 0)
|
|
RageException::ThrowNonfatal("dsnd_pcm_open: %s", dsnd_strerror(err));
|
|
|
|
if( !SetHWParams() )
|
|
{
|
|
CHECKPOINT;
|
|
dsnd_pcm_close(pcm);
|
|
CHECKPOINT;
|
|
RageException::ThrowNonfatal( "SetHWParams failed" );
|
|
}
|
|
|
|
SetSWParams();
|
|
total_frames = dsnd_pcm_avail_update(pcm);
|
|
}
|
|
|
|
Alsa9Buf::~Alsa9Buf()
|
|
{
|
|
dsnd_pcm_close(pcm);
|
|
}
|
|
|
|
|
|
/* Don't fill the buffer any more than than "writeahead" frames. Prefer to
|
|
* write "chunksize" frames at a time. (These numbers are hints; if the
|
|
* hardware parameters require it, they can be ignored.) */
|
|
int Alsa9Buf::GetNumFramesToFill( snd_pcm_sframes_t writeahead, snd_pcm_sframes_t chunksize )
|
|
{
|
|
/* We have to write at least xfer_align bytes. */
|
|
chunksize = max( chunksize, xfer_align );
|
|
|
|
/* Make sure we can write ahead at least two chunks. Otherwise, we'll only
|
|
* fill one chunk ahead, and underrun. */
|
|
writeahead = max( writeahead, chunksize*2 );
|
|
|
|
snd_pcm_sframes_t avail_frames = dsnd_pcm_avail_update(pcm);
|
|
|
|
if( avail_frames > total_frames )
|
|
{
|
|
/* underrun */
|
|
const int size = avail_frames-total_frames;
|
|
LOG->Trace("underrun (%i frames)", size);
|
|
int large_skip_threshold = 2 * samplerate;
|
|
|
|
/* For small underruns, ignore them. We'll return the maximum writeahead and ALSA will
|
|
* just discard the data. GetPosition will return consistent values during this time,
|
|
* so arrows will continue to scroll smoothly until the music catches up. */
|
|
if( size >= large_skip_threshold )
|
|
{
|
|
/* It's a large skip. Catch up. If we fall too far behind, the sound thread will
|
|
* be decoding as fast as it can, which will steal too many cycles from the rendering
|
|
* thread. */
|
|
dsnd_pcm_forward( pcm, size );
|
|
}
|
|
}
|
|
|
|
if( avail_frames < 0 )
|
|
avail_frames = dsnd_pcm_avail_update(pcm);
|
|
|
|
if( avail_frames < 0 )
|
|
{
|
|
LOG->Trace( "RageSoundDriver_ALSA9::GetData: dsnd_pcm_avail_update: %s", dsnd_strerror(avail_frames) );
|
|
return 0;
|
|
}
|
|
|
|
/* Number of frames that have data: */
|
|
const snd_pcm_sframes_t filled_frames = max( 0l, total_frames - avail_frames );
|
|
|
|
/* Number of frames that don't have data, that are within the writeahead: */
|
|
snd_pcm_sframes_t unfilled_frames = clamp( writeahead - filled_frames, 0l, (snd_pcm_sframes_t)writeahead );
|
|
|
|
/* If we have less than a chunk empty, don't fill at all. Otherwise, we'll
|
|
* spend a lot of CPU filling in partial chunks, instead of waiting for some
|
|
* sound to play and then filling a whole chunk at once. */
|
|
if( unfilled_frames < chunksize )
|
|
return 0;
|
|
|
|
/* We must always return a multiple of xfer_align. This might cause less than chunksize
|
|
* to be returned; that's OK. */
|
|
snd_pcm_sframes_t frames_to_fill = chunksize;
|
|
frames_to_fill -= frames_to_fill % xfer_align;
|
|
|
|
return frames_to_fill;
|
|
}
|
|
|
|
void Alsa9Buf::Write( const Sint16 *buffer, int frames )
|
|
{
|
|
/* We should be able to write it all. If we don't, treat it as an error. */
|
|
int wrote = dsnd_pcm_mmap_writei( pcm, (const char *) buffer, frames );
|
|
if( wrote < 0 )
|
|
{
|
|
LOG->Trace( "RageSoundDriver_ALSA9::GetData: dsnd_pcm_mmap_writei: %s (%i)", dsnd_strerror(wrote), wrote );
|
|
return;
|
|
}
|
|
|
|
last_cursor_pos += wrote;
|
|
if( wrote < frames )
|
|
LOG->Trace("Couldn't write whole buffer? (%i < %i)", wrote, frames );
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* When the play buffer underruns, subsequent writes to the buffer
|
|
* return -EPIPE. When this happens, call Recover() to restart playback.
|
|
*/
|
|
bool Alsa9Buf::Recover( int r )
|
|
{
|
|
if( r == -EPIPE )
|
|
{
|
|
LOG->Trace("RageSound_ALSA9::Recover (prepare)");
|
|
int err = dsnd_pcm_prepare(pcm);
|
|
ALSA_ASSERT("dsnd_pcm_prepare (Recover)");
|
|
return true;
|
|
}
|
|
|
|
if( r == -ESTRPIPE )
|
|
{
|
|
LOG->Trace("RageSound_ALSA9::Recover (resume)");
|
|
int err;
|
|
while ((err = dsnd_pcm_resume(pcm)) == -EAGAIN)
|
|
SDL_Delay(10);
|
|
|
|
ALSA_ASSERT("dsnd_pcm_resume (Recover)");
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
int64_t Alsa9Buf::GetPosition() const
|
|
{
|
|
if( dsnd_pcm_state(pcm) == SND_PCM_STATE_PREPARED )
|
|
return last_cursor_pos;
|
|
|
|
dsnd_pcm_hwsync( pcm );
|
|
|
|
/* delay is returned in frames */
|
|
snd_pcm_sframes_t delay;
|
|
int err = dsnd_pcm_delay( pcm, &delay );
|
|
ALSA_ASSERT("dsnd_pcm_delay");
|
|
|
|
return last_cursor_pos - delay;
|
|
}
|
|
|
|
void Alsa9Buf::Play()
|
|
{
|
|
/* NOP. It'll start playing when it gets some data. */
|
|
}
|
|
|
|
void Alsa9Buf::Stop()
|
|
{
|
|
dsnd_pcm_drop( pcm );
|
|
dsnd_pcm_prepare( pcm );
|
|
last_cursor_pos = 0;
|
|
}
|
|
|
|
void Alsa9Buf::SetSampleRate(int hz)
|
|
{
|
|
samplerate = hz;
|
|
samplerate_set_explicitly = true;
|
|
|
|
if( !SetHWParams() )
|
|
{
|
|
/*
|
|
* If this fails, we're no longer set up; if we call SW param calls,
|
|
* ALSA will assert out on us (instead of gracefully returning an error).
|
|
*
|
|
* If we fail here, it means we set up the initial stream, but can't
|
|
* configure it to the sample rate we want. This happened on a CS46xx
|
|
* with an old ALSA version, at least: snd_pcm_hw_params failed
|
|
* with ENOMEM. It set up only 10 44.1khz streams; it may have been
|
|
* trying to increase one to 48khz and, for some reason, that needed
|
|
* more card memory. (I've tried to work around that by setting up
|
|
* streams as 48khz to begin with, so we set it up as the maximum
|
|
* to begin with.)
|
|
*/
|
|
FAIL_M( ssprintf("SetHWParams(%i) failed", hz) );
|
|
}
|
|
|
|
SetSWParams();
|
|
}
|
|
|
|
CString Alsa9Buf::GetHardwareID( CString name )
|
|
{
|
|
InitializeErrorHandler();
|
|
|
|
if( name.empty() )
|
|
name = DeviceName;
|
|
|
|
snd_ctl_t *handle;
|
|
int err;
|
|
err = dsnd_ctl_open( &handle, name, 0 );
|
|
if ( err < 0 )
|
|
{
|
|
LOG->Info( "Couldn't open card \"%s\" to get ID: %s", name.c_str(), dsnd_strerror(err) );
|
|
return "???";
|
|
}
|
|
|
|
snd_ctl_card_info_t *info;
|
|
dsnd_ctl_card_info_alloca(&info);
|
|
err = dsnd_ctl_card_info( handle, info );
|
|
CString ret = dsnd_ctl_card_info_get_id( info );
|
|
dsnd_ctl_close(handle);
|
|
|
|
return ret;
|
|
}
|