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------------------------------------------------------------------------
r4191 | acceptthis | 2013-02-10 17:19:47 +0000 (Sun, 10 Feb 2013) | 1 line Try to fix alsa latencies. Again. ------------------------------------------------------------------------ git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@4189 fc73d0e0-1445-4013-8a0c-d673dee63da5
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parent
c23206fefd
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051a32d742
1 changed files with 64 additions and 34 deletions
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@ -53,9 +53,11 @@ int (*psnd_pcm_sw_params_set_stop_threshold) (snd_pcm_t *pcm, snd_pcm_sw_params_
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int (*psnd_pcm_sw_params) (snd_pcm_t *pcm, snd_pcm_sw_params_t *params);
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int (*psnd_pcm_hw_params_get_buffer_size) (const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
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int (*psnd_pcm_hw_params_set_buffer_size_near) (snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val);
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int (*psnd_pcm_set_params) (snd_pcm_t *pcm, snd_pcm_format_t format, snd_pcm_access_t access, unsigned int channels, unsigned int rate, int soft_resample, unsigned int latency);
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snd_pcm_sframes_t (*psnd_pcm_avail_update) (snd_pcm_t *pcm);
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snd_pcm_state_t (*psnd_pcm_state) (snd_pcm_t *pcm);
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int (*psnd_pcm_start) (snd_pcm_t *pcm);
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int (*psnd_pcm_recover) (snd_pcm_t *pcm, int err, int silent);
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size_t (*psnd_pcm_hw_params_sizeof) (void);
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size_t (*psnd_pcm_sw_params_sizeof) (void);
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@ -113,6 +115,12 @@ static unsigned int ALSA_RW_GetDMAPos (soundcardinfo_t *sc)
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{
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int frames;
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frames = psnd_pcm_avail_update(sc->handle);
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if (frames < 0)
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{
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psnd_pcm_start (sc->handle);
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psnd_pcm_recover(sc->handle, frames, true);
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frames = psnd_pcm_avail_update(sc->handle);
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}
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if (frames >= 0)
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{
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sc->sn.samplepos = (sc->snd_sent + frames) * sc->sn.numchannels;
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@ -121,45 +129,47 @@ static unsigned int ALSA_RW_GetDMAPos (soundcardinfo_t *sc)
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}
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static void ALSA_RW_Submit (soundcardinfo_t *sc, int start, int end)
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{
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int state;
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// int state;
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unsigned int frames, offset, ringsize;
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unsigned chunk;
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int result;
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int stride = sc->sn.numchannels * (sc->sn.samplebits/8);
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/*we can't change the data that was already written*/
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frames = end - sc->snd_sent;
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if (!frames)
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return;
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state = psnd_pcm_state (sc->handle);
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ringsize = sc->sn.samples / sc->sn.numchannels;
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chunk = frames;
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offset = sc->snd_sent % ringsize;
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if (offset + chunk >= ringsize)
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chunk = ringsize - offset;
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result = psnd_pcm_writei(sc->handle, sc->sn.buffer + offset*stride, chunk);
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if (result < chunk)
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while(1)
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{
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if (result >= 0)
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sc->snd_sent += result;
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return;
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}
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sc->snd_sent += chunk;
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/*we can't change the data that was already written*/
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frames = end - sc->snd_sent;
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if (frames <= 0)
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return;
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chunk = frames - chunk;
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if (chunk)
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{
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result = psnd_pcm_writei(sc->handle, sc->sn.buffer, chunk);
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if (result > 0)
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sc->snd_sent += result;
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}
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// state = psnd_pcm_state (sc->handle);
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if (state == SND_PCM_STATE_PREPARED)
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psnd_pcm_start (sc->handle);
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ringsize = sc->sn.samples / sc->sn.numchannels;
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chunk = frames;
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offset = sc->snd_sent % ringsize;
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if (offset + chunk >= ringsize)
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chunk = ringsize - offset;
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result = psnd_pcm_writei(sc->handle, sc->sn.buffer + offset*stride, chunk);
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if (result < chunk)
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{
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if (result < 0)
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return;
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}
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sc->snd_sent += chunk;
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chunk = frames - chunk;
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if (chunk)
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{
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result = psnd_pcm_writei(sc->handle, sc->sn.buffer, chunk);
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if (result > 0)
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sc->snd_sent += result;
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}
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// if (state == SND_PCM_STATE_PREPARED)
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// psnd_pcm_start (sc->handle);
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};
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}
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static void ALSA_Shutdown (soundcardinfo_t *sc)
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@ -221,6 +231,8 @@ static qboolean Alsa_InitAlsa(void)
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psnd_pcm_avail_update = dlsym(alsasharedobject, "snd_pcm_avail_update");
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psnd_pcm_state = dlsym(alsasharedobject, "snd_pcm_state");
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psnd_pcm_start = dlsym(alsasharedobject, "snd_pcm_start");
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psnd_pcm_recover = dlsym(alsasharedobject, "snd_pcm_recover");
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psnd_pcm_set_params = dlsym(alsasharedobject, "snd_pcm_set_params");
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psnd_pcm_hw_params_sizeof = dlsym(alsasharedobject, "snd_pcm_hw_params_sizeof");
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psnd_pcm_sw_params_sizeof = dlsym(alsasharedobject, "snd_pcm_sw_params_sizeof");
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psnd_pcm_hw_params_set_buffer_size_near = dlsym(alsasharedobject, "snd_pcm_hw_params_set_buffer_size_near");
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@ -314,8 +326,24 @@ static int ALSA_InitCard (soundcardinfo_t *sc, int cardnum)
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}
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Con_Printf ("ALSA: Using PCM %s.\n", pcmname);
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#if 1
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err = psnd_pcm_set_params(pcm, ((sc->sn.samplebits==8)?SND_PCM_FORMAT_U8:SND_PCM_FORMAT_S16), (mmap?SND_PCM_ACCESS_MMAP_INTERLEAVED:SND_PCM_ACCESS_RW_INTERLEAVED), sc->sn.numchannels, sc->sn.speed, true, 0.04*1000000);
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if (0 > err)
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{
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Con_Printf (CON_ERROR "ALSA: error setting params. %s\n",
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psnd_strerror (err));
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goto error;
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}
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// sc->sn.numchannels = stereo;
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// sc->sn.samplepos = 0;
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// sc->sn.samplebits = bps;
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sc->samplequeue = buffer_size = 2048;
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#else
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err = psnd_pcm_hw_params_any (pcm, hw);
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if (0 > err) {
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if (0 > err)
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{
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Con_Printf (CON_ERROR "ALSA: error setting hw_params_any. %s\n",
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psnd_strerror (err));
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goto error;
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@ -401,7 +429,8 @@ static int ALSA_InitCard (soundcardinfo_t *sc, int cardnum)
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frag_size = 8 * bps;
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err = psnd_pcm_hw_params_set_period_size_near (pcm, hw, &frag_size, 0);
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if (0 > err) {
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if (0 > err)
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{
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Con_Printf (CON_ERROR "ALSA: unable to set period size near %i. %s\n",
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(int) frag_size, psnd_strerror (err));
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goto error;
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@ -458,9 +487,10 @@ static int ALSA_InitCard (soundcardinfo_t *sc, int cardnum)
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psnd_strerror (err));
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goto error;
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}
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sc->sn.speed = rate;
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#endif
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sc->sn.samples = buffer_size * sc->sn.numchannels; // mono samples in buffer
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sc->sn.speed = rate;
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sc->handle = pcm;
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sc->Lock = ALSA_LockBuffer;
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