replaced by ALSA9
This commit is contained in:
Aaron VonderHaar
@@ -1,277 +0,0 @@
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/* Rage Sound Driver for Linux using ALSA
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* (C) 2003 Tim Hentenaar
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*/
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#define ALSA_PCM_NEW_HW_PARAMS_API
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#include <alsa/asoundlib.h>
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#include "RageSoundDriver_Linux.h"
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#include "RageTimer.h"
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#include "RageLog.h"
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#include "RageSound.h"
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#include "RageUtil.h"
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#include "RageException.h"
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#include "SDL_utils.h"
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#include "SDL/SDL_thread.h"
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#include "global.h"
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#include <vector>
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using namespace std;
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/* Get the chunk size */
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#define CHUNKSIZE(x,y) y = x / 8;
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/* Buffer size in frames */
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#define BUFSIZE_F(x,y) y = x / 2;
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/* Minimum Buffer Size (bytes) */
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#define BUFSIZE(x) x ? 1024 : 1024*16;
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void RageSound_Linux::OpenAudio() {
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/* Open Device [default hardware sound device] (non-blocking) */
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snd_pcm_open(&playback_handle, "hw", SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
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/* Set up the device parameter struct */
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snd_pcm_hw_params_t *hw_params;
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snd_pcm_hw_params_malloc(&hw_params);
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snd_pcm_hw_params_any(playback_handle,hw_params);
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/* Non-Interleaved Access (since we hold the samples in a buffer) */
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snd_pcm_hw_params_set_access(playback_handle,hw_params,SND_PCM_ACCESS_RW_NONINTERLEAVED);
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/* Set the audio format */
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/* 16-bit signed CPU-Endian */
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snd_pcm_hw_params_set_format(playback_handle,hw_params,SND_PCM_FORMAT_S16);
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/* 44100 Hz Rate (or closest supported match) */
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unsigned int rate = 44100;
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snd_pcm_hw_params_set_rate_near(playback_handle,hw_params,&rate,0);
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/* 2 channels (stereo) */
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snd_pcm_hw_params_set_channels(playback_handle,hw_params,2);
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/* Set Sample Size (channels * 2) */
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snd_pcm_uframes_t z = 4;
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snd_pcm_hw_params_set_period_size_near(playback_handle,hw_params,&z,NULL);
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/* Get hardware Buffer Size and allocate buffer
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* It should be as big as the hardware buffer or 8K whichever
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* is larger
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*/
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snd_pcm_hw_params_get_buffer_size(hw_params, &buffer_size);
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BUFSIZE(buffer_size);
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sbuffer = (Sint16 *)malloc(buffer_size); /* snd_pcm_sframes_t = long */
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/* Apply the settings to the device */
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snd_pcm_hw_params(playback_handle,hw_params);
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/* free hw_params struct */
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snd_pcm_hw_params_free(hw_params);
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}
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void RageSound_Linux::CloseAudio() {
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/* close the PCM */
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snd_pcm_close(playback_handle);
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if (sbuffer) free(sbuffer); /* free sound buffer */
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sbuffer = NULL;
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}
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void RageSound_Linux::RecoverState(long state) {
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/* Revcover from suspended/overflowed state
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* by re-preparing the device for use
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*/
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int err = 0;
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switch((int)state) {
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case -EPIPE: /* buffer under-run */
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if (snd_pcm_prepare(playback_handle) < 0)
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LOG->Trace("RageSound_Linux::RecoverState(): Unable to recover from sound buffer underrun!");
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break;
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case -ESTRPIPE: /* suspend */
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if (err = snd_pcm_resume(playback_handle) == -EAGAIN) sleep(1);
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err = snd_pcm_resume(playback_handle);
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if (err < 0) RageException::Throw("RageSound_Linux::RecoverState(): Unable To recover from suspend!");
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break;
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};
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snd_pcm_prepare(playback_handle);
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}
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void RageSound_Linux::StartMixing(RageSound *snd) {
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sound *s = new sound;
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s->snd = snd;
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SDL_LockAudio();
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sounds.push_back(s);
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SDL_UnlockAudio();
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}
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void RageSound_Linux::StopMixing(RageSound *snd) {
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LockMutex L(SOUNDMAN->lock);
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int i = 0;
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/* Find the sound. */
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for(i = 0; i < sounds.size(); ++i) if(sounds[i]->snd == snd) break;
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if(i == sounds.size()) {
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LOG->Trace("RageSound_Linux::StopMixing(): not stopping a sound because it's not playing");
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return;
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}
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delete sounds[i];
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sounds.erase(sounds.begin()+i, sounds.begin()+i+1);
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}
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bool RageSound_Linux::GetData() {
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LockMutex L(SOUNDMAN->lock);
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Sint16 *buf = NULL;
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/* Find a free chunk */
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for (int b = 0; b<8; b++) {
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if (chunks[b] != NULL) break;
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if (b == 8) return false;
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int bufsiz = 0;
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BUFSIZE_F(buffer_size,bufsiz);
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bufsiz *= 16;
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if (!buf) buf = (Sint16 *)malloc(bufsiz);
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int cs = 0;
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CHUNKSIZE(buffer_size,cs);
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memset(buf,0,sizeof(buf));
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memset(chunks[b],0,sizeof(chunks[b]));
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SoundMixBuffer mix;
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for (int i = 0; i<sounds.size(); i++) {
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if (sounds[i]->stopping) continue;
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/* Call the Callback */
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char *d = (char *)malloc(sizeof(buf));
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memcpy(d,buf,sizeof(buf));
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int got = sounds[i]->snd->GetPCM((char *)d,(int)cs,(int)last_pos);
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memmove(buf,d,sizeof(buf));
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free(d);
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mix.write(buf,got/2);
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if (got < cs) {
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/* sound is finishing */
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sounds[i]->stopping = true;
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sounds[i]->flush_pos = last_pos + (got / 16);
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}
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}
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mix.read(chunks[b]); /* Get the sound */
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snd_pcm_prepare(playback_handle); /* Prepare for write */
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/* Non-Interleaved Write */
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long ret = snd_pcm_writen(playback_handle,(void **)&chunks[b],sizeof(chunks[b]));
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RecoverState(ret); /* Check for an error and recover */
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last_pos += cs;
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}
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if (buf) free(buf);
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return true;
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}
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void RageSound_Linux::Update(float delta) {
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LockMutex L(SOUNDMAN->lock);
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/* SoundStopped might erase sounds out from under us, so make a copy
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* of the sound list. */
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vector<sound_t *> snds = sounds;
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for(unsigned i = 0; i < snds.size(); ++i)
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{
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if(!sounds[i]->stopping) continue;
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if(GetPosition(snds[i]->snd) < sounds[i]->flush_pos) continue; /* stopping but still flushing */
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/* This sound is done. */
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snds[i]->snd->StopPlaying();
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}
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}
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int RageSound_Linux::GetPosition(const RageSound *snd) const {
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LockMutex L(SOUNDMAN->lock);
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/* Get a timestamp from the stream's status */
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int err;
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snd_pcm_status_t *status;
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snd_timestamp_t *x;
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snd_pcm_status_alloca(&status);
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if ((err = snd_pcm_status(playback_handle, status)) < 0) {
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char errstr[100];
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memset(errstr,0,100);
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sprintf(errstr,"RageSound_Linux::GetPosition(): Stream status error: %s\n", snd_strerror(err));
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RageException::Throw(errstr);
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return 0;
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}
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snd_pcm_status_get_trigger_tstamp(status, x);
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/* Convert it to samples
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* To be exact, we should get the rate from the
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* hardware, but this should do. (The rate will
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* be 44100 Hz anyway :P)
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*/
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return (x->tv_usec / 1000) * 44100;
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}
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float RageSound_Linux::GetPlayLatency() const {
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int bufsize_frames = 1;
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BUFSIZE_F(buffer_size,bufsize_frames);
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return (float)((1.0f / 44100) * ( bufsize_frames - (bufsize_frames / 8)));
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}
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RageSound_Linux::RageSound_Linux() {
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last_pos = 0;
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shutdown = false;
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MixerThreadPtr = SDL_CreateThread(MixerThread_start,this);
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}
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RageSound_Linux::~RageSound_Linux() {
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LOG->Trace("RageSoundDriver_Linux::~RageSoundDriver_Linux(): Shutting down mixer thread ...");
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shutdown = true;
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SDL_WaitThread(MixerThreadPtr, NULL);
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LOG->Trace("Mixer thread shut down.");
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CloseAudio();
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}
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int RageSound_Linux::MixerThread_start(void *p) {
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((RageSound_Linux *) p)->MixerThread();
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return 0;
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}
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void RageSound_Linux::MixerThread() {
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/* SOUNDMAN will be set once RageSoundManager's ctor returns and
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* assigns it; we might get here before that happens, though. */
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while(!SOUNDMAN && !shutdown) SDL_Delay(10);
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while(!shutdown) { while (GetData()); }
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}
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@@ -1,58 +0,0 @@
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/* (C) 2003 Tim Hentenaar */
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#ifndef RAGE_SOUND_LINUX
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#define RAGE_SOUND_LINUX
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#include <vector>
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using namespace std;
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#include "RageSoundDriver.h"
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#include "SDL_thread.h"
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#include "global.h"
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#include <alsa/asoundlib.h>
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/* A lot of this is from Glenn's RageSoundDriver_WaveOut */
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struct sound {
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RageSound *snd;
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bool stopping;
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int flush_pos; /* state == STOPPING only */
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sound() { snd = NULL; stopping = false; }
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};
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typedef struct sound sound_t;
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class RageSound_Linux : public RageSoundDriver {
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public:
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/* Currently Playing Sounds */
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vector<sound_t *> sounds;
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SDL_Thread *MixerThreadPtr;
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snd_pcm_uframes_t buffer_size;
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Sint16 *sbuffer; /* Sound Buffer */
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Sint16 *chunks[8]; /* chunks of sound buffer */
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snd_pcm_t *playback_handle; /* Handle for PCM device */
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int last_pos;
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bool shutdown;
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void RecoverState(long state); /* Recover from various states */
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void MixerThread();
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static int MixerThread_start(void *p);
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bool GetData();
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void OpenAudio();
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void CloseAudio();
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void StartMixing(RageSound *snd);
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void StopMixing(RageSound *snd);
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int GetPosition(const RageSound *snd) const;
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float GetPlayLatency() const;
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void Update(float delta);
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RageSound_Linux();
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~RageSound_Linux();
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};
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#endif
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