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Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/nas/SDL_nasaudio.c')
-rw-r--r--distrib/sdl-1.2.12/src/audio/nas/SDL_nasaudio.c299
1 files changed, 0 insertions, 299 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/nas/SDL_nasaudio.c b/distrib/sdl-1.2.12/src/audio/nas/SDL_nasaudio.c
deleted file mode 100644
index b5d2a3b..0000000
--- a/distrib/sdl-1.2.12/src/audio/nas/SDL_nasaudio.c
+++ /dev/null
@@ -1,299 +0,0 @@
-/*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2006 Sam Lantinga
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
- Sam Lantinga
- slouken@libsdl.org
-
- This driver was written by:
- Erik Inge Bolsų
- knan@mo.himolde.no
-*/
-#include "SDL_config.h"
-
-/* Allow access to a raw mixing buffer */
-
-#include <signal.h>
-#include <unistd.h>
-
-#include "SDL_timer.h"
-#include "SDL_audio.h"
-#include "../SDL_audiomem.h"
-#include "../SDL_audio_c.h"
-#include "../SDL_audiodev_c.h"
-#include "SDL_nasaudio.h"
-
-/* The tag name used by artsc audio */
-#define NAS_DRIVER_NAME "nas"
-
-static struct SDL_PrivateAudioData *this2 = NULL;
-
-/* Audio driver functions */
-static int NAS_OpenAudio(_THIS, SDL_AudioSpec *spec);
-static void NAS_WaitAudio(_THIS);
-static void NAS_PlayAudio(_THIS);
-static Uint8 *NAS_GetAudioBuf(_THIS);
-static void NAS_CloseAudio(_THIS);
-
-/* Audio driver bootstrap functions */
-
-static int Audio_Available(void)
-{
- AuServer *aud = AuOpenServer("", 0, NULL, 0, NULL, NULL);
- if (!aud) return 0;
-
- AuCloseServer(aud);
- return 1;
-}
-
-static void Audio_DeleteDevice(SDL_AudioDevice *device)
-{
- SDL_free(device->hidden);
- SDL_free(device);
-}
-
-static SDL_AudioDevice *Audio_CreateDevice(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 *this));
- this->hidden = (struct SDL_PrivateAudioData *)
- SDL_malloc((sizeof *this->hidden));
- }
- if ( (this == NULL) || (this->hidden == NULL) ) {
- SDL_OutOfMemory();
- if ( this ) {
- SDL_free(this);
- }
- return(0);
- }
- SDL_memset(this->hidden, 0, (sizeof *this->hidden));
-
- /* Set the function pointers */
- this->OpenAudio = NAS_OpenAudio;
- this->WaitAudio = NAS_WaitAudio;
- this->PlayAudio = NAS_PlayAudio;
- this->GetAudioBuf = NAS_GetAudioBuf;
- this->CloseAudio = NAS_CloseAudio;
-
- this->free = Audio_DeleteDevice;
-
- return this;
-}
-
-AudioBootStrap NAS_bootstrap = {
- NAS_DRIVER_NAME, "Network Audio System",
- Audio_Available, Audio_CreateDevice
-};
-
-/* This function waits until it is possible to write a full sound buffer */
-static void NAS_WaitAudio(_THIS)
-{
- while ( this->hidden->buf_free < this->hidden->mixlen ) {
- AuEvent ev;
- AuNextEvent(this->hidden->aud, AuTrue, &ev);
- AuDispatchEvent(this->hidden->aud, &ev);
- }
-}
-
-static void NAS_PlayAudio(_THIS)
-{
- while (this->hidden->mixlen > this->hidden->buf_free) { /* We think the buffer is full? Yikes! Ask the server for events,
- in the hope that some of them is LowWater events telling us more
- of the buffer is free now than what we think. */
- AuEvent ev;
- AuNextEvent(this->hidden->aud, AuTrue, &ev);
- AuDispatchEvent(this->hidden->aud, &ev);
- }
- this->hidden->buf_free -= this->hidden->mixlen;
-
- /* Write the audio data */
- AuWriteElement(this->hidden->aud, this->hidden->flow, 0, this->hidden->mixlen, this->hidden->mixbuf, AuFalse, NULL);
-
- this->hidden->written += this->hidden->mixlen;
-
-#ifdef DEBUG_AUDIO
- fprintf(stderr, "Wrote %d bytes of audio data\n", this->hidden->mixlen);
-#endif
-}
-
-static Uint8 *NAS_GetAudioBuf(_THIS)
-{
- return(this->hidden->mixbuf);
-}
-
-static void NAS_CloseAudio(_THIS)
-{
- if ( this->hidden->mixbuf != NULL ) {
- SDL_FreeAudioMem(this->hidden->mixbuf);
- this->hidden->mixbuf = NULL;
- }
- if ( this->hidden->aud ) {
- AuCloseServer(this->hidden->aud);
- this->hidden->aud = 0;
- }
-}
-
-static unsigned char sdlformat_to_auformat(unsigned int fmt)
-{
- switch (fmt)
- {
- case AUDIO_U8:
- return AuFormatLinearUnsigned8;
- case AUDIO_S8:
- return AuFormatLinearSigned8;
- case AUDIO_U16LSB:
- return AuFormatLinearUnsigned16LSB;
- case AUDIO_U16MSB:
- return AuFormatLinearUnsigned16MSB;
- case AUDIO_S16LSB:
- return AuFormatLinearSigned16LSB;
- case AUDIO_S16MSB:
- return AuFormatLinearSigned16MSB;
- }
- return AuNone;
-}
-
-static AuBool
-event_handler(AuServer* aud, AuEvent* ev, AuEventHandlerRec* hnd)
-{
- switch (ev->type) {
- case AuEventTypeElementNotify: {
- AuElementNotifyEvent* event = (AuElementNotifyEvent *)ev;
-
- switch (event->kind) {
- case AuElementNotifyKindLowWater:
- if (this2->buf_free >= 0) {
- this2->really += event->num_bytes;
- gettimeofday(&this2->last_tv, 0);
- this2->buf_free += event->num_bytes;
- } else {
- this2->buf_free = event->num_bytes;
- }
- break;
- case AuElementNotifyKindState:
- switch (event->cur_state) {
- case AuStatePause:
- if (event->reason != AuReasonUser) {
- if (this2->buf_free >= 0) {
- this2->really += event->num_bytes;
- gettimeofday(&this2->last_tv, 0);
- this2->buf_free += event->num_bytes;
- } else {
- this2->buf_free = event->num_bytes;
- }
- }
- break;
- }
- }
- }
- }
- return AuTrue;
-}
-
-static AuDeviceID
-find_device(_THIS, int nch)
-{
- int i;
- for (i = 0; i < AuServerNumDevices(this->hidden->aud); i++) {
- if ((AuDeviceKind(AuServerDevice(this->hidden->aud, i)) ==
- AuComponentKindPhysicalOutput) &&
- AuDeviceNumTracks(AuServerDevice(this->hidden->aud, i)) == nch) {
- return AuDeviceIdentifier(AuServerDevice(this->hidden->aud, i));
- }
- }
- return AuNone;
-}
-
-static int NAS_OpenAudio(_THIS, SDL_AudioSpec *spec)
-{
- AuElement elms[3];
- int buffer_size;
- Uint16 test_format, format;
-
- this->hidden->mixbuf = NULL;
-
- /* Try for a closest match on audio format */
- format = 0;
- for ( test_format = SDL_FirstAudioFormat(spec->format);
- ! format && test_format; ) {
- format = sdlformat_to_auformat(test_format);
-
- if (format == AuNone) {
- test_format = SDL_NextAudioFormat();
- }
- }
- if ( format == 0 ) {
- SDL_SetError("Couldn't find any hardware audio formats");
- return(-1);
- }
- spec->format = test_format;
-
- this->hidden->aud = AuOpenServer("", 0, NULL, 0, NULL, NULL);
- if (this->hidden->aud == 0)
- {
- SDL_SetError("Couldn't open connection to NAS server");
- return (-1);
- }
-
- this->hidden->dev = find_device(this, spec->channels);
- if ((this->hidden->dev == AuNone) || (!(this->hidden->flow = AuCreateFlow(this->hidden->aud, NULL)))) {
- AuCloseServer(this->hidden->aud);
- this->hidden->aud = 0;
- SDL_SetError("Couldn't find a fitting playback device on NAS server");
- return (-1);
- }
-
- buffer_size = spec->freq;
- if (buffer_size < 4096)
- buffer_size = 4096;
-
- if (buffer_size > 32768)
- buffer_size = 32768; /* So that the buffer won't get unmanageably big. */
-
- /* Calculate the final parameters for this audio specification */
- SDL_CalculateAudioSpec(spec);
-
- this2 = this->hidden;
-
- AuMakeElementImportClient(elms, spec->freq, format, spec->channels, AuTrue,
- buffer_size, buffer_size / 4, 0, NULL);
- AuMakeElementExportDevice(elms+1, 0, this->hidden->dev, spec->freq,
- AuUnlimitedSamples, 0, NULL);
- AuSetElements(this->hidden->aud, this->hidden->flow, AuTrue, 2, elms, NULL);
- AuRegisterEventHandler(this->hidden->aud, AuEventHandlerIDMask, 0, this->hidden->flow,
- event_handler, (AuPointer) NULL);
-
- AuStartFlow(this->hidden->aud, this->hidden->flow, NULL);
-
- /* Allocate mixing buffer */
- this->hidden->mixlen = spec->size;
- this->hidden->mixbuf = (Uint8 *)SDL_AllocAudioMem(this->hidden->mixlen);
- if ( this->hidden->mixbuf == NULL ) {
- return(-1);
- }
- SDL_memset(this->hidden->mixbuf, spec->silence, spec->size);
-
- /* Get the parent process id (we're the parent of the audio thread) */
- this->hidden->parent = getpid();
-
- /* We're ready to rock and roll. :-) */
- return(0);
-}
generated by cgit v1.1 at 2024-04-27 15:26:47 +0000