Date: Sat, 13 Sep 2003 15:50:43 +0300
From: "Mike Gorchak" Subject: QNX fixes improved sound code for the QNX, added workarounds for known bugs, fixed photon detect code. Update .qpg file. --HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40719
This commit is contained in:
Sam Lantinga
parent
794bba8fca
commit
bf7b6262f6
5 changed files with 477 additions and 411 deletions
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@ -30,8 +30,9 @@
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sched.h>
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#include <sys/asoundlib.h>
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#include <sys/select.h>
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#include <sys/neutrino.h>
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#include <sys/asoundlib.h>
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#include "SDL_audio.h"
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#include "SDL_error.h"
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@ -41,11 +42,12 @@
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#include "SDL_nto_audio.h"
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/* The tag name used by NTO audio */
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#define DRIVER_NAME "nto"
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#define DRIVER_NAME "qsa-nto"
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/* default channel communication parameters */
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#define DEFAULT_CPARAMS_RATE 22050
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#define DEFAULT_CPARAMS_VOICES 1
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/* FIXME: need to add in the near future flexible logic with frag_size and frags count */
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#define DEFAULT_CPARAMS_FRAG_SIZE 4096
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#define DEFAULT_CPARAMS_FRAGS_MIN 1
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#define DEFAULT_CPARAMS_FRAGS_MAX 1
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@ -53,438 +55,456 @@
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/* Open the audio device for playback, and don't block if busy */
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#define OPEN_FLAGS SND_PCM_OPEN_PLAYBACK
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#define QSA_NO_WORKAROUNDS 0x00000000
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#define QSA_MMAP_WORKAROUND 0x00000001
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struct BuggyCards
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{
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char* cardname;
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unsigned long bugtype;
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};
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#define QSA_WA_CARDS 3
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struct BuggyCards buggycards[QSA_WA_CARDS]=
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{
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{"Sound Blaster Live!", QSA_MMAP_WORKAROUND},
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{"Vortex 8820", QSA_MMAP_WORKAROUND},
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{"Vortex 8830", QSA_MMAP_WORKAROUND},
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};
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/* Audio driver functions */
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static int NTO_OpenAudio(_THIS, SDL_AudioSpec *spec);
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static void NTO_ThreadInit(_THIS);
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static int NTO_OpenAudio(_THIS, SDL_AudioSpec* spec);
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static void NTO_WaitAudio(_THIS);
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static void NTO_PlayAudio(_THIS);
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static Uint8 *NTO_GetAudioBuf(_THIS);
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static Uint8* NTO_GetAudioBuf(_THIS);
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static void NTO_CloseAudio(_THIS);
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static snd_pcm_channel_status_t cstatus;
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static snd_pcm_channel_params_t cparams;
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static snd_pcm_channel_setup_t csetup;
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/* card names check to apply the workarounds */
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static int NTO_CheckBuggyCards(_THIS, unsigned long checkfor)
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{
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char scardname[33];
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int it;
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if (snd_card_get_name(cardno, scardname, 32)<0)
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{
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return 0;
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}
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for (it=0; it<QSA_WA_CARDS; it++)
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{
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if (strcmp(buggycards[it].cardname, scardname)==0)
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{
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if (buggycards[it].bugtype==checkfor)
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{
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return 1;
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}
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}
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}
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return 0;
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}
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static void NTO_ThreadInit(_THIS)
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{
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int status;
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struct sched_param param;
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/* increasing default 10 priority to 25 to avoid jerky sound */
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status=SchedGet(0, 0, ¶m);
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param.sched_priority=param.sched_curpriority+15;
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status=SchedSet(0, 0, SCHED_NOCHANGE, ¶m);
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}
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/* PCM transfer channel parameters initialize function */
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static void init_pcm_cparams(snd_pcm_channel_params_t* cparams)
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static void NTO_InitAudioParams(snd_pcm_channel_params_t* cpars)
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{
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memset(cparams,0,sizeof(snd_pcm_channel_params_t));
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memset(cpars, 0, sizeof(snd_pcm_channel_params_t));
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cparams->channel = SND_PCM_CHANNEL_PLAYBACK;
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cparams->mode = SND_PCM_MODE_BLOCK;
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cparams->start_mode = SND_PCM_START_DATA;
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cparams->stop_mode = SND_PCM_STOP_STOP;
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cparams->format.format = SND_PCM_SFMT_S16_LE;
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cparams->format.interleave = 1;
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cparams->format.rate = DEFAULT_CPARAMS_RATE;
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cparams->format.voices = DEFAULT_CPARAMS_VOICES;
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cparams->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE;
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cparams->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN;
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cparams->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX;
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cpars->channel = SND_PCM_CHANNEL_PLAYBACK;
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cpars->mode = SND_PCM_MODE_BLOCK;
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cpars->start_mode = SND_PCM_START_DATA;
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cpars->stop_mode = SND_PCM_STOP_STOP;
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cpars->format.format = SND_PCM_SFMT_S16_LE;
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cpars->format.interleave = 1;
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cpars->format.rate = DEFAULT_CPARAMS_RATE;
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cpars->format.voices = DEFAULT_CPARAMS_VOICES;
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cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE;
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cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN;
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cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX;
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}
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static int Audio_Available(void)
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static int NTO_AudioAvailable(void)
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{
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/*
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See if we can open a nonblocking channel.
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Return value '1' means we can.
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Return value '0' means we cannot.
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*/
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/* See if we can open a nonblocking channel.
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Return value '1' means we can.
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Return value '0' means we cannot. */
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int available;
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int rval;
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snd_pcm_t *handle;
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int available;
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int rval;
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snd_pcm_t* handle;
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available = 0;
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handle = NULL;
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available = 0;
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handle = NULL;
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rval = snd_pcm_open_preferred(&handle, NULL, NULL, OPEN_FLAGS);
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rval = snd_pcm_open_preferred(&handle, NULL, NULL, OPEN_FLAGS);
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if (rval >= 0){
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available = 1;
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if ((rval = snd_pcm_close(handle)) < 0){
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SDL_SetError("snd_pcm_close failed: %s\n",snd_strerror(rval));
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available = 0;
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}
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}
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else{
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SDL_SetError("snd_pcm_open failed: %s\n", snd_strerror(rval));
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}
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#ifdef DEBUG_AUDIO
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fprintf(stderr,"AudioAvailable rtns %d\n", available);
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#endif
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return(available);
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if (rval >= 0)
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{
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available = 1;
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if ((rval = snd_pcm_close(handle)) < 0)
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{
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SDL_SetError("NTO_AudioAvailable(): snd_pcm_close failed: %s\n", snd_strerror(rval));
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available = 0;
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}
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}
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else
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{
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SDL_SetError("NTO_AudioAvailable(): there are no available audio devices.\n");
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}
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return (available);
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}
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static void Audio_DeleteDevice(SDL_AudioDevice *device)
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static void NTO_DeleteAudioDevice(SDL_AudioDevice *device)
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{
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#ifdef DEBUG_AUDIO
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fprintf(stderr,"Audio_DeleteDevice\n");
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#endif
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free(device->hidden);
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free(device);
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if ((device)&&(device->hidden))
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{
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free(device->hidden);
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}
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if (device)
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{
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free(device);
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}
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}
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static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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static SDL_AudioDevice* NTO_CreateAudioDevice(int devindex)
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{
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SDL_AudioDevice *this;
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#ifdef DEBUG_AUDIO
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fprintf(stderr,"Audio_CreateDevice\n");
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#endif
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/* Initialize all variables that we clean on shutdown */
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this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
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if ( this ) {
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memset(this, 0, (sizeof *this));
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this->hidden = (struct SDL_PrivateAudioData *)
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malloc((sizeof *this->hidden));
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SDL_AudioDevice *this;
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/* Initialize all variables that we clean on shutdown */
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this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
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if (this)
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{
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memset(this, 0, sizeof(SDL_AudioDevice));
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this->hidden = (struct SDL_PrivateAudioData *)malloc(sizeof(struct SDL_PrivateAudioData));
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}
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if ((this == NULL) || (this->hidden == NULL))
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{
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SDL_OutOfMemory();
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if (this)
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{
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free(this);
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}
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if ( (this == NULL) || (this->hidden == NULL) ) {
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SDL_OutOfMemory();
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if ( this ) {
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free(this);
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}
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return(0);
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}
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memset(this->hidden, 0, (sizeof *this->hidden));
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audio_handle = NULL;
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return (0);
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}
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memset(this->hidden, 0, sizeof(struct SDL_PrivateAudioData));
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audio_handle = NULL;
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/* Set the function pointers */
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this->OpenAudio = NTO_OpenAudio;
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this->WaitAudio = NTO_WaitAudio;
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this->PlayAudio = NTO_PlayAudio;
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this->GetAudioBuf = NTO_GetAudioBuf;
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this->CloseAudio = NTO_CloseAudio;
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/* Set the function pointers */
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this->ThreadInit = NTO_ThreadInit;
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this->OpenAudio = NTO_OpenAudio;
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this->WaitAudio = NTO_WaitAudio;
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this->PlayAudio = NTO_PlayAudio;
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this->GetAudioBuf = NTO_GetAudioBuf;
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this->CloseAudio = NTO_CloseAudio;
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this->free = Audio_DeleteDevice;
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this->free = NTO_DeleteAudioDevice;
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return this;
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return this;
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}
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AudioBootStrap QNXNTOAUDIO_bootstrap = {
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DRIVER_NAME, "QNX6 NTO PCM audio",
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Audio_Available, Audio_CreateDevice
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AudioBootStrap QNXNTOAUDIO_bootstrap =
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{
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DRIVER_NAME, "QNX6 QSA-NTO Audio",
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NTO_AudioAvailable,
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NTO_CreateAudioDevice
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};
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/* This function waits until it is possible to write a full sound buffer */
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static void NTO_WaitAudio(_THIS)
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{
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fd_set wfds;
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fd_set wfds;
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int selectret;
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FD_SET( audio_fd, &wfds );
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switch( select( audio_fd + 1, NULL, &wfds, NULL, NULL ) )
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{
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case -1:
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case 0:
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/* Error */
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SDL_SetError("select() in NTO_WaitAudio failed: %s\n", strerror(errno));
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break;
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default:
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if(FD_ISSET(audio_fd, &wfds))
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return;
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}
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FD_ZERO(&wfds);
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FD_SET(audio_fd, &wfds);
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do {
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selectret=select(audio_fd + 1, NULL, &wfds, NULL, NULL);
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switch (selectret)
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{
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case -1:
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case 0: SDL_SetError("NTO_WaitAudio(): select() failed: %s\n", strerror(errno));
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return;
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default: if (FD_ISSET(audio_fd, &wfds))
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{
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return;
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}
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break;
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}
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} while(1);
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}
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static void NTO_PlayAudio(_THIS)
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{
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int written, rval;
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int towrite;
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int written, rval;
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int towrite;
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void* pcmbuffer;
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "NTO_PlayAudio\n");
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#endif
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if (!this->enabled)
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{
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return;
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}
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towrite = this->spec.size;
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pcmbuffer = pcm_buf;
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if( !this->enabled){
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return;
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}
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/* Write the audio data, checking for EAGAIN (buffer full) and underrun */
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do {
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written = snd_pcm_plugin_write(audio_handle, pcm_buf, towrite);
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if (written != towrite)
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{
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if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
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{
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/* Let a little CPU time go by and try to write again */
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SDL_Delay(1);
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/* if we wrote some data */
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towrite -= written;
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pcmbuffer += written * this->spec.channels;
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continue;
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}
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else
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{
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if ((errno == EINVAL) || (errno == EIO))
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{
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memset(&cstatus, 0, sizeof(cstatus));
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cstatus.channel = SND_PCM_CHANNEL_PLAYBACK;
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if ((rval = snd_pcm_plugin_status(audio_handle, &cstatus)) < 0)
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{
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SDL_SetError("NTO_PlayAudio(): snd_pcm_plugin_status failed: %s\n", snd_strerror(rval));
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return;
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}
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if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) || (cstatus.status == SND_PCM_STATUS_READY))
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{
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if ((rval = snd_pcm_plugin_prepare(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0)
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{
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SDL_SetError("NTO_PlayAudio(): snd_pcm_plugin_prepare failed: %s\n", snd_strerror(rval));
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return;
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}
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}
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continue;
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}
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else
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{
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return;
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}
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}
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}
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else
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{
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/* we wrote all remaining data */
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towrite -= written;
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pcmbuffer += written * this->spec.channels;
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}
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} while ((towrite > 0) && (this->enabled));
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towrite = pcm_len;
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/* Write the audio data, checking for EAGAIN (buffer full) and underrun */
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do {
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written = snd_pcm_plugin_write(audio_handle, pcm_buf, towrite);
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "NTO_PlayAudio: written = %d towrite = %d\n",written,towrite);
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#endif
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if (written != towrite){
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if ((errno == EAGAIN) || (errno == EWOULDBLOCK)){
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SDL_Delay(1); /* Let a little CPU time go by and try to write again */
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "errno == EAGAIN written %d\n", written);
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#endif
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towrite -= written; //we wrote some data
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continue;
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}
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else if((errno == EINVAL) || (errno == EIO)){
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if(errno == EIO){
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#ifdef DEBUG_AUDIO
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fprintf(stderr,"snd_pcm_plugin_write failed EIO: %s\n", snd_strerror(written));
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#endif
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}
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if(errno == EINVAL){
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#ifdef DEBUG_AUDIO
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fprintf(stderr,"snd_pcm_plugin_write failed EINVAL: %s\n", snd_strerror(written));
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#endif
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}
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memset(&cstatus, 0, sizeof(cstatus));
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if( (rval = snd_pcm_plugin_status(audio_handle, &cstatus)) < 0 ){
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "snd_pcm_plugin_status failed %s\n",snd_strerror(rval));
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#endif
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SDL_SetError("snd_pcm_plugin_status failed: %s\n", snd_strerror(rval));
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return;
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}
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if ( (cstatus.status == SND_PCM_STATUS_UNDERRUN) || (cstatus.status == SND_PCM_STATUS_READY) ){
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "buffer underrun\n");
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#endif
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if ( (rval = snd_pcm_plugin_prepare (audio_handle,SND_PCM_CHANNEL_PLAYBACK)) < 0 ){
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "NTO_PlayAudio: prepare failed %s\n",snd_strerror(rval));
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#endif
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SDL_SetError("snd_pcm_plugin_prepare failed: %s\n",snd_strerror(rval) );
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return;
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}
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}
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continue;
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}
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else{
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "NTO_PlayAudio: snd_pcm_plugin_write failed unknown errno %d %s\n",errno, snd_strerror(rval));
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#endif
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return;
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}
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}
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else
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{
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towrite -= written; //we wrote all remaining data
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}
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} while ( (towrite > 0) && (this->enabled) );
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/* If we couldn't write, assume fatal error for now */
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if (towrite != 0)
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{
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this->enabled = 0;
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}
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/* If we couldn't write, assume fatal error for now */
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if ( towrite != 0 ) {
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this->enabled = 0;
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}
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return;
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return;
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}
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static Uint8 *NTO_GetAudioBuf(_THIS)
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static Uint8* NTO_GetAudioBuf(_THIS)
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{
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "NTO_GetAudioBuf: pcm_buf %X\n",(Uint8 *)pcm_buf);
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#endif
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return(pcm_buf);
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return pcm_buf;
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}
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static void NTO_CloseAudio(_THIS)
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{
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int rval;
|
||||
int rval;
|
||||
|
||||
#ifdef DEBUG_AUDIO
|
||||
fprintf(stderr, "NTO_CloseAudio\n");
|
||||
#endif
|
||||
this->enabled = 0;
|
||||
|
||||
this->enabled = 0;
|
||||
|
||||
if ( audio_handle != NULL ) {
|
||||
if ((rval = snd_pcm_plugin_flush(audio_handle,SND_PCM_CHANNEL_PLAYBACK)) < 0){
|
||||
SDL_SetError("snd_pcm_plugin_flush failed: %s\n",snd_strerror(rval));
|
||||
return;
|
||||
}
|
||||
if ((rval = snd_pcm_close(audio_handle)) < 0){
|
||||
SDL_SetError("snd_pcm_close failed: %s\n",snd_strerror(rval));
|
||||
return;
|
||||
}
|
||||
audio_handle = NULL;
|
||||
}
|
||||
if (audio_handle != NULL)
|
||||
{
|
||||
if ((rval = snd_pcm_plugin_flush(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0)
|
||||
{
|
||||
SDL_SetError("NTO_CloseAudio(): snd_pcm_plugin_flush failed: %s\n", snd_strerror(rval));
|
||||
return;
|
||||
}
|
||||
if ((rval = snd_pcm_close(audio_handle)) < 0)
|
||||
{
|
||||
SDL_SetError("NTO_CloseAudio(): snd_pcm_close failed: %s\n",snd_strerror(rval));
|
||||
return;
|
||||
}
|
||||
audio_handle = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static int NTO_OpenAudio(_THIS, SDL_AudioSpec *spec)
|
||||
static int NTO_OpenAudio(_THIS, SDL_AudioSpec* spec)
|
||||
{
|
||||
int rval;
|
||||
int format;
|
||||
Uint16 test_format;
|
||||
int twidth;
|
||||
int found;
|
||||
int rval;
|
||||
int format;
|
||||
Uint16 test_format;
|
||||
int found;
|
||||
|
||||
#ifdef DEBUG_AUDIO
|
||||
fprintf(stderr, "NTO_OpenAudio\n");
|
||||
#endif
|
||||
audio_handle = NULL;
|
||||
this->enabled = 0;
|
||||
|
||||
if (pcm_buf != NULL)
|
||||
{
|
||||
SDL_FreeAudioMem(pcm_buf);
|
||||
pcm_buf = NULL;
|
||||
}
|
||||
|
||||
/* initialize channel transfer parameters to default */
|
||||
NTO_InitAudioParams(&cparams);
|
||||
|
||||
/* Open the audio device */
|
||||
rval = snd_pcm_open_preferred(&audio_handle, &cardno, &deviceno, OPEN_FLAGS);
|
||||
if (rval < 0)
|
||||
{
|
||||
SDL_SetError("NTO_OpenAudio(): snd_pcm_open failed: %s\n", snd_strerror(rval));
|
||||
return (-1);
|
||||
}
|
||||
|
||||
if (!NTO_CheckBuggyCards(this, QSA_MMAP_WORKAROUND))
|
||||
{
|
||||
/* enable count status parameter */
|
||||
if ((rval = snd_pcm_plugin_set_disable(audio_handle, PLUGIN_DISABLE_MMAP)) < 0)
|
||||
{
|
||||
SDL_SetError("snd_pcm_plugin_set_disable failed: %s\n", snd_strerror(rval));
|
||||
return (-1);
|
||||
}
|
||||
}
|
||||
|
||||
/* Try for a closest match on audio format */
|
||||
format = 0;
|
||||
/* can't use format as SND_PCM_SFMT_U8 = 0 in nto */
|
||||
found = 0;
|
||||
|
||||
for (test_format=SDL_FirstAudioFormat(spec->format); !found ;)
|
||||
{
|
||||
/* if match found set format to equivalent ALSA format */
|
||||
switch (test_format)
|
||||
{
|
||||
case AUDIO_U8:
|
||||
format = SND_PCM_SFMT_U8;
|
||||
found = 1;
|
||||
break;
|
||||
case AUDIO_S8:
|
||||
format = SND_PCM_SFMT_S8;
|
||||
found = 1;
|
||||
break;
|
||||
case AUDIO_S16LSB:
|
||||
format = SND_PCM_SFMT_S16_LE;
|
||||
found = 1;
|
||||
break;
|
||||
case AUDIO_S16MSB:
|
||||
format = SND_PCM_SFMT_S16_BE;
|
||||
found = 1;
|
||||
break;
|
||||
case AUDIO_U16LSB:
|
||||
format = SND_PCM_SFMT_U16_LE;
|
||||
found = 1;
|
||||
break;
|
||||
case AUDIO_U16MSB:
|
||||
format = SND_PCM_SFMT_U16_BE;
|
||||
found = 1;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
if (!found)
|
||||
{
|
||||
test_format = SDL_NextAudioFormat();
|
||||
}
|
||||
}
|
||||
|
||||
/* assumes test_format not 0 on success */
|
||||
if (test_format == 0)
|
||||
{
|
||||
SDL_SetError("NTO_OpenAudio(): Couldn't find any hardware audio formats");
|
||||
return (-1);
|
||||
}
|
||||
|
||||
spec->format = test_format;
|
||||
|
||||
/* Set the audio format */
|
||||
cparams.format.format = format;
|
||||
|
||||
/* Set mono or stereo audio (currently only two channels supported) */
|
||||
cparams.format.voices = spec->channels;
|
||||
|
||||
audio_handle = NULL;
|
||||
this->enabled = 0;
|
||||
/* Set rate */
|
||||
cparams.format.rate = spec->freq;
|
||||
|
||||
if ( pcm_buf != NULL ) {
|
||||
free((Uint8 *)pcm_buf);
|
||||
pcm_buf = NULL;
|
||||
}
|
||||
|
||||
/* initialize channel transfer parameters to default */
|
||||
init_pcm_cparams(&cparams);
|
||||
/* Setup the transfer parameters according to cparams */
|
||||
rval = snd_pcm_plugin_params(audio_handle, &cparams);
|
||||
if (rval < 0)
|
||||
{
|
||||
SDL_SetError("NTO_OpenAudio(): snd_pcm_channel_params failed: %s\n", snd_strerror(rval));
|
||||
return (-1);
|
||||
}
|
||||
|
||||
/* Open the audio device */
|
||||
rval = snd_pcm_open_preferred(&audio_handle, NULL, NULL, OPEN_FLAGS);
|
||||
if ( rval < 0 ) {
|
||||
SDL_SetError("snd_pcm_open failed: %s\n", snd_strerror(rval));
|
||||
return(-1);
|
||||
}
|
||||
/* Make sure channel is setup right one last time */
|
||||
memset(&csetup, 0x00, sizeof(csetup));
|
||||
csetup.channel = SND_PCM_CHANNEL_PLAYBACK;
|
||||
if (snd_pcm_plugin_setup(audio_handle, &csetup) < 0)
|
||||
{
|
||||
SDL_SetError("NTO_OpenAudio(): Unable to setup playback channel\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* enable count status parameter */
|
||||
if ((rval = snd_pcm_plugin_set_disable(audio_handle, PLUGIN_DISABLE_MMAP))<0){
|
||||
SDL_SetError("snd_pcm_plugin_set_disable failed: %s\n", snd_strerror(rval));
|
||||
return(-1);
|
||||
}
|
||||
|
||||
/* Try for a closest match on audio format */
|
||||
format = 0;
|
||||
found = 0; /* can't use format as SND_PCM_SFMT_U8 = 0 in nto */
|
||||
for ( test_format = SDL_FirstAudioFormat(spec->format); !found ; )
|
||||
{
|
||||
#ifdef DEBUG_AUDIO
|
||||
fprintf(stderr, "Trying format 0x%4.4x spec->samples %d\n", test_format,spec->samples);
|
||||
#endif
|
||||
|
||||
/* if match found set format to equivalent ALSA format */
|
||||
switch ( test_format ) {
|
||||
case AUDIO_U8:
|
||||
format = SND_PCM_SFMT_U8;
|
||||
found = 1;
|
||||
break;
|
||||
case AUDIO_S8:
|
||||
format = SND_PCM_SFMT_S8;
|
||||
found = 1;
|
||||
break;
|
||||
case AUDIO_S16LSB:
|
||||
format = SND_PCM_SFMT_S16_LE;
|
||||
found = 1;
|
||||
break;
|
||||
case AUDIO_S16MSB:
|
||||
format = SND_PCM_SFMT_S16_BE;
|
||||
found = 1;
|
||||
break;
|
||||
case AUDIO_U16LSB:
|
||||
format = SND_PCM_SFMT_U16_LE;
|
||||
found = 1;
|
||||
break;
|
||||
case AUDIO_U16MSB:
|
||||
format = SND_PCM_SFMT_U16_BE;
|
||||
found = 1;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
if ( ! found ) {
|
||||
test_format = SDL_NextAudioFormat();
|
||||
}
|
||||
}
|
||||
/* Calculate the final parameters for this audio specification */
|
||||
SDL_CalculateAudioSpec(spec);
|
||||
|
||||
/* assumes test_format not 0 on success */
|
||||
if ( test_format == 0 ) {
|
||||
SDL_SetError("Couldn't find any hardware audio formats");
|
||||
return(-1);
|
||||
}
|
||||
pcm_len = spec->size;
|
||||
|
||||
spec->format = test_format;
|
||||
if (pcm_len==0)
|
||||
{
|
||||
pcm_len = csetup.buf.block.frag_size * spec->channels * (snd_pcm_format_width(format)/8);
|
||||
}
|
||||
|
||||
/* Set the audio format */
|
||||
cparams.format.format = format;
|
||||
/* Allocate memory to the audio buffer and initialize with silence (Note that
|
||||
buffer size must be a multiple of fragment size, so find closest multiple)
|
||||
*/
|
||||
pcm_buf = (Uint8*)SDL_AllocAudioMem(pcm_len);
|
||||
if (pcm_buf == NULL)
|
||||
{
|
||||
SDL_SetError("NTO_OpenAudio(): pcm buffer allocation failed\n");
|
||||
return (-1);
|
||||
}
|
||||
memset(pcm_buf, spec->silence, pcm_len);
|
||||
|
||||
/* Set mono or stereo audio (currently only two channels supported) */
|
||||
cparams.format.voices = spec->channels;
|
||||
|
||||
#ifdef DEBUG_AUDIO
|
||||
fprintf(stderr,"intializing channels %d\n", cparams.format.voices);
|
||||
#endif
|
||||
/* get the file descriptor */
|
||||
if ((audio_fd = snd_pcm_file_descriptor(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0)
|
||||
{
|
||||
SDL_SetError("NTO_OpenAudio(): snd_pcm_file_descriptor failed with error code: %s\n", snd_strerror(rval));
|
||||
return (-1);
|
||||
}
|
||||
|
||||
/* Set rate */
|
||||
cparams.format.rate = spec->freq ;
|
||||
/* Trigger audio playback */
|
||||
rval = snd_pcm_plugin_prepare(audio_handle, SND_PCM_CHANNEL_PLAYBACK);
|
||||
if (rval < 0)
|
||||
{
|
||||
SDL_SetError("snd_pcm_plugin_prepare failed: %s\n", snd_strerror(rval));
|
||||
return (-1);
|
||||
}
|
||||
|
||||
/* Setup the transfer parameters according to cparams */
|
||||
rval = snd_pcm_plugin_params(audio_handle, &cparams);
|
||||
if (rval < 0) {
|
||||
SDL_SetError("snd_pcm_channel_params failed: %s\n", snd_strerror (rval));
|
||||
return(-1);
|
||||
}
|
||||
this->enabled = 1;
|
||||
|
||||
/* Make sure channel is setup right one last time */
|
||||
memset( &csetup, 0, sizeof( csetup ) );
|
||||
csetup.channel = SND_PCM_CHANNEL_PLAYBACK;
|
||||
if ( snd_pcm_plugin_setup( audio_handle, &csetup ) < 0 )
|
||||
{
|
||||
SDL_SetError("Unable to setup playback channel\n" );
|
||||
return(-1);
|
||||
}
|
||||
else
|
||||
{
|
||||
#ifdef DEBUG_AUDIO
|
||||
fprintf(stderr,"requested format: %d\n",cparams.format.format);
|
||||
fprintf(stderr,"requested frag size: %d\n",cparams.buf.block.frag_size);
|
||||
fprintf(stderr,"requested max frags: %d\n\n",cparams.buf.block.frags_max);
|
||||
/* Get the parent process id (we're the parent of the audio thread) */
|
||||
parent = getpid();
|
||||
|
||||
fprintf(stderr,"real format: %d\n", csetup.format.format );
|
||||
fprintf(stderr,"real frag size : %d\n", csetup.buf.block.frag_size );
|
||||
fprintf(stderr,"real max frags : %d\n", csetup.buf.block.frags_max );
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
Allocate memory to the audio buffer and initialize with silence (Note that
|
||||
buffer size must be a multiple of fragment size, so find closest multiple)
|
||||
*/
|
||||
|
||||
twidth = snd_pcm_format_width(format);
|
||||
if (twidth < 0) {
|
||||
printf("snd_pcm_format_width failed\n");
|
||||
twidth = 0;
|
||||
}
|
||||
|
||||
#ifdef DEBUG_AUDIO
|
||||
fprintf(stderr,"format is %d bits wide\n",twidth);
|
||||
#endif
|
||||
|
||||
pcm_len = spec->size ;
|
||||
|
||||
#ifdef DEBUG_AUDIO
|
||||
fprintf(stderr,"pcm_len set to %d\n", pcm_len);
|
||||
#endif
|
||||
|
||||
if (pcm_len == 0){
|
||||
pcm_len = csetup.buf.block.frag_size;
|
||||
}
|
||||
|
||||
pcm_buf = (Uint8*)malloc(pcm_len);
|
||||
if (pcm_buf == NULL) {
|
||||
SDL_SetError("pcm_buf malloc failed\n");
|
||||
return(-1);
|
||||
}
|
||||
memset(pcm_buf,spec->silence,pcm_len);
|
||||
|
||||
#ifdef DEBUG_AUDIO
|
||||
fprintf(stderr,"pcm_buf malloced and silenced.\n");
|
||||
#endif
|
||||
|
||||
/* get the file descriptor */
|
||||
if( (audio_fd = snd_pcm_file_descriptor(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0){
|
||||
fprintf(stderr, "snd_pcm_file_descriptor failed with error code: %d\n", audio_fd);
|
||||
}
|
||||
|
||||
/* Trigger audio playback */
|
||||
rval = snd_pcm_plugin_prepare( audio_handle, SND_PCM_CHANNEL_PLAYBACK);
|
||||
if (rval < 0) {
|
||||
SDL_SetError("snd_pcm_plugin_prepare failed: %s\n", snd_strerror (rval));
|
||||
return(-1);
|
||||
}
|
||||
|
||||
this->enabled = 1;
|
||||
|
||||
/* Get the parent process id (we're the parent of the audio thread) */
|
||||
parent = getpid();
|
||||
|
||||
/* We're ready to rock and roll. :-) */
|
||||
return(0);
|
||||
/* We're really ready to rock and roll. :-) */
|
||||
return (0);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -20,36 +20,47 @@
|
|||
slouken@libsdl.org
|
||||
*/
|
||||
|
||||
#ifndef _NTO_PCM_audio_h
|
||||
#define _NTO_PCM_audio_h
|
||||
#ifndef __SDL_NTO_AUDIO_H__
|
||||
#define __SDL_NTO_AUDIO_H__
|
||||
|
||||
#include "SDL_sysaudio.h"
|
||||
#include <sys/asoundlib.h>
|
||||
|
||||
/* Hidden "this" pointer for the video functions */
|
||||
/* Hidden "this" pointer for the audio functions */
|
||||
#define _THIS SDL_AudioDevice *this
|
||||
|
||||
struct SDL_PrivateAudioData {
|
||||
/* The audio device handle */
|
||||
snd_pcm_t *audio_handle;
|
||||
struct SDL_PrivateAudioData
|
||||
{
|
||||
/* The audio device handle */
|
||||
int cardno;
|
||||
int deviceno;
|
||||
snd_pcm_t* audio_handle;
|
||||
|
||||
/* The audio file descriptor */
|
||||
int audio_fd;
|
||||
/* The audio file descriptor */
|
||||
int audio_fd;
|
||||
|
||||
/* The parent process id, to detect when application quits */
|
||||
pid_t parent;
|
||||
/* The parent process id, to detect when application quits */
|
||||
pid_t parent;
|
||||
|
||||
/* Raw mixing buffer */
|
||||
Uint8 *pcm_buf;
|
||||
int pcm_len;
|
||||
/* Raw mixing buffer */
|
||||
Uint8* pcm_buf;
|
||||
Uint32 pcm_len;
|
||||
|
||||
/* QSA parameters */
|
||||
snd_pcm_channel_status_t cstatus;
|
||||
snd_pcm_channel_params_t cparams;
|
||||
snd_pcm_channel_setup_t csetup;
|
||||
};
|
||||
#define FUDGE_TICKS 10 /* The scheduler overhead ticks per frame */
|
||||
|
||||
/* Old variable names */
|
||||
#define audio_handle (this->hidden->audio_handle)
|
||||
#define audio_fd (this->hidden->audio_fd)
|
||||
#define parent (this->hidden->parent)
|
||||
#define pcm_buf (this->hidden->pcm_buf)
|
||||
#define pcm_len (this->hidden->pcm_len)
|
||||
#define cardno (this->hidden->cardno)
|
||||
#define deviceno (this->hidden->deviceno)
|
||||
#define audio_handle (this->hidden->audio_handle)
|
||||
#define audio_fd (this->hidden->audio_fd)
|
||||
#define parent (this->hidden->parent)
|
||||
#define pcm_buf (this->hidden->pcm_buf)
|
||||
#define pcm_len (this->hidden->pcm_len)
|
||||
#define cstatus (this->hidden->cstatus)
|
||||
#define cparams (this->hidden->cparams)
|
||||
#define csetup (this->hidden->csetup)
|
||||
|
||||
#endif /* _NTO_PCM_audio_h */
|
||||
#endif /* __SDL_NTO_AUDIO_H__ */
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue