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Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/nto/SDL_nto_audio.c')
-rw-r--r--distrib/sdl-1.2.12/src/audio/nto/SDL_nto_audio.c507
1 files changed, 0 insertions, 507 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/nto/SDL_nto_audio.c b/distrib/sdl-1.2.12/src/audio/nto/SDL_nto_audio.c
deleted file mode 100644
index db86bae..0000000
--- a/distrib/sdl-1.2.12/src/audio/nto/SDL_nto_audio.c
+++ /dev/null
@@ -1,507 +0,0 @@
-/*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2004 Sam Lantinga
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
- Sam Lantinga
- slouken@libsdl.org
-*/
-#include "SDL_config.h"
-
-#include <errno.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sched.h>
-#include <sys/select.h>
-#include <sys/neutrino.h>
-#include <sys/asoundlib.h>
-
-#include "SDL_timer.h"
-#include "SDL_audio.h"
-#include "../SDL_audiomem.h"
-#include "../SDL_audio_c.h"
-#include "SDL_nto_audio.h"
-
-/* The tag name used by NTO audio */
-#define DRIVER_NAME "qsa-nto"
-
-/* default channel communication parameters */
-#define DEFAULT_CPARAMS_RATE 22050
-#define DEFAULT_CPARAMS_VOICES 1
-/* FIXME: need to add in the near future flexible logic with frag_size and frags count */
-#define DEFAULT_CPARAMS_FRAG_SIZE 4096
-#define DEFAULT_CPARAMS_FRAGS_MIN 1
-#define DEFAULT_CPARAMS_FRAGS_MAX 1
-
-/* Open the audio device for playback, and don't block if busy */
-#define OPEN_FLAGS SND_PCM_OPEN_PLAYBACK
-
-#define QSA_NO_WORKAROUNDS 0x00000000
-#define QSA_MMAP_WORKAROUND 0x00000001
-
-struct BuggyCards
-{
- char* cardname;
- unsigned long bugtype;
-};
-
-#define QSA_WA_CARDS 3
-
-struct BuggyCards buggycards[QSA_WA_CARDS]=
-{
- {"Sound Blaster Live!", QSA_MMAP_WORKAROUND},
- {"Vortex 8820", QSA_MMAP_WORKAROUND},
- {"Vortex 8830", QSA_MMAP_WORKAROUND},
-};
-
-/* Audio driver functions */
-static void NTO_ThreadInit(_THIS);
-static int NTO_OpenAudio(_THIS, SDL_AudioSpec* spec);
-static void NTO_WaitAudio(_THIS);
-static void NTO_PlayAudio(_THIS);
-static Uint8* NTO_GetAudioBuf(_THIS);
-static void NTO_CloseAudio(_THIS);
-
-/* card names check to apply the workarounds */
-static int NTO_CheckBuggyCards(_THIS, unsigned long checkfor)
-{
- char scardname[33];
- int it;
-
- if (snd_card_get_name(cardno, scardname, 32)<0)
- {
- return 0;
- }
-
- for (it=0; it<QSA_WA_CARDS; it++)
- {
- if (SDL_strcmp(buggycards[it].cardname, scardname)==0)
- {
- if (buggycards[it].bugtype==checkfor)
- {
- return 1;
- }
- }
- }
-
- return 0;
-}
-
-static void NTO_ThreadInit(_THIS)
-{
- int status;
- struct sched_param param;
-
- /* increasing default 10 priority to 25 to avoid jerky sound */
- status=SchedGet(0, 0, &param);
- param.sched_priority=param.sched_curpriority+15;
- status=SchedSet(0, 0, SCHED_NOCHANGE, &param);
-}
-
-/* PCM transfer channel parameters initialize function */
-static void NTO_InitAudioParams(snd_pcm_channel_params_t* cpars)
-{
- SDL_memset(cpars, 0, sizeof(snd_pcm_channel_params_t));
-
- cpars->channel = SND_PCM_CHANNEL_PLAYBACK;
- cpars->mode = SND_PCM_MODE_BLOCK;
- cpars->start_mode = SND_PCM_START_DATA;
- cpars->stop_mode = SND_PCM_STOP_STOP;
- cpars->format.format = SND_PCM_SFMT_S16_LE;
- cpars->format.interleave = 1;
- cpars->format.rate = DEFAULT_CPARAMS_RATE;
- cpars->format.voices = DEFAULT_CPARAMS_VOICES;
- cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE;
- cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN;
- cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX;
-}
-
-static int NTO_AudioAvailable(void)
-{
- /* See if we can open a nonblocking channel.
- Return value '1' means we can.
- Return value '0' means we cannot. */
-
- int available;
- int rval;
- snd_pcm_t* handle;
-
- available = 0;
- handle = NULL;
-
- rval = snd_pcm_open_preferred(&handle, NULL, NULL, OPEN_FLAGS);
-
- if (rval >= 0)
- {
- available = 1;
-
- if ((rval = snd_pcm_close(handle)) < 0)
- {
- SDL_SetError("NTO_AudioAvailable(): snd_pcm_close failed: %s\n", snd_strerror(rval));
- available = 0;
- }
- }
- else
- {
- SDL_SetError("NTO_AudioAvailable(): there are no available audio devices.\n");
- }
-
- return (available);
-}
-
-static void NTO_DeleteAudioDevice(SDL_AudioDevice *device)
-{
- if ((device)&&(device->hidden))
- {
- SDL_free(device->hidden);
- }
- if (device)
- {
- SDL_free(device);
- }
-}
-
-static SDL_AudioDevice* NTO_CreateAudioDevice(int devindex)
-{
- SDL_AudioDevice *this;
-
- /* Initialize all variables that we clean on shutdown */
- this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
- if (this)
- {
- SDL_memset(this, 0, sizeof(SDL_AudioDevice));
- this->hidden = (struct SDL_PrivateAudioData *)SDL_malloc(sizeof(struct SDL_PrivateAudioData));
- }
- if ((this == NULL) || (this->hidden == NULL))
- {
- SDL_OutOfMemory();
- if (this)
- {
- SDL_free(this);
- }
- return (0);
- }
- SDL_memset(this->hidden, 0, sizeof(struct SDL_PrivateAudioData));
- audio_handle = NULL;
-
- /* Set the function pointers */
- this->ThreadInit = NTO_ThreadInit;
- this->OpenAudio = NTO_OpenAudio;
- this->WaitAudio = NTO_WaitAudio;
- this->PlayAudio = NTO_PlayAudio;
- this->GetAudioBuf = NTO_GetAudioBuf;
- this->CloseAudio = NTO_CloseAudio;
-
- this->free = NTO_DeleteAudioDevice;
-
- return this;
-}
-
-AudioBootStrap QNXNTOAUDIO_bootstrap =
-{
- DRIVER_NAME, "QNX6 QSA-NTO Audio",
- NTO_AudioAvailable,
- NTO_CreateAudioDevice
-};
-
-/* This function waits until it is possible to write a full sound buffer */
-static void NTO_WaitAudio(_THIS)
-{
- fd_set wfds;
- int selectret;
-
- FD_ZERO(&wfds);
- FD_SET(audio_fd, &wfds);
-
- do {
- selectret=select(audio_fd + 1, NULL, &wfds, NULL, NULL);
- switch (selectret)
- {
- case -1:
- case 0: SDL_SetError("NTO_WaitAudio(): select() failed: %s\n", strerror(errno));
- return;
- default: if (FD_ISSET(audio_fd, &wfds))
- {
- return;
- }
- break;
- }
- } while(1);
-}
-
-static void NTO_PlayAudio(_THIS)
-{
- int written, rval;
- int towrite;
- void* pcmbuffer;
-
- if (!this->enabled)
- {
- return;
- }
-
- towrite = this->spec.size;
- pcmbuffer = pcm_buf;
-
- /* Write the audio data, checking for EAGAIN (buffer full) and underrun */
- do {
- written = snd_pcm_plugin_write(audio_handle, pcm_buf, towrite);
- if (written != towrite)
- {
- if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
- {
- /* Let a little CPU time go by and try to write again */
- SDL_Delay(1);
- /* if we wrote some data */
- towrite -= written;
- pcmbuffer += written * this->spec.channels;
- continue;
- }
- else
- {
- if ((errno == EINVAL) || (errno == EIO))
- {
- SDL_memset(&cstatus, 0, sizeof(cstatus));
- cstatus.channel = SND_PCM_CHANNEL_PLAYBACK;
- if ((rval = snd_pcm_plugin_status(audio_handle, &cstatus)) < 0)
- {
- SDL_SetError("NTO_PlayAudio(): snd_pcm_plugin_status failed: %s\n", snd_strerror(rval));
- return;
- }
- if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) || (cstatus.status == SND_PCM_STATUS_READY))
- {
- if ((rval = snd_pcm_plugin_prepare(audio_handle, SND_PCM_CHANNEL_PLAYBACK)) < 0)
- {
- SDL_SetError("NTO_PlayAudio(): snd_pcm_plugin_prepare failed: %s\n", snd_strerror(rval));
- return;
- }
- }
- continue;
- }
- else
- {
- return;
- }
- }
- }
- else
- {
- /* we wrote all remaining data */
- towrite -= written;
- pcmbuffer += written * this->spec.channels;
- }
- } while ((towrite > 0) && (this->enabled));
-
- /* If we couldn't write, assume fatal error for now */
- if (towrite != 0)
- {
- this->enabled = 0;
- }
-
- return;
-}
-
-static Uint8* NTO_GetAudioBuf(_THIS)
-{
- return pcm_buf;
-}
-
-static void NTO_CloseAudio(_THIS)
-{
- int rval;
-
- this->enabled = 0;
-
- 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)
-{
- int rval;
- int format;
- Uint16 test_format;
- int found;
-
- 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;
-
- /* Set rate */
- cparams.format.rate = spec->freq;
-
- /* 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);
- }
-
- /* Make sure channel is setup right one last time */
- SDL_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;
- }
-
-
- /* Calculate the final parameters for this audio specification */
- SDL_CalculateAudioSpec(spec);
-
- pcm_len = spec->size;
-
- if (pcm_len==0)
- {
- pcm_len = csetup.buf.block.frag_size * spec->channels * (snd_pcm_format_width(format)/8);
- }
-
- /* 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);
- }
- SDL_memset(pcm_buf, spec->silence, pcm_len);
-
- /* 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);
- }
-
- /* 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 really ready to rock and roll. :-) */
- return (0);
-}
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