558a5b6909
Untested: No BeOS system here for compiling! --HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402044
255 lines
7.9 KiB
C++
255 lines
7.9 KiB
C++
/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* Allow access to the audio stream on BeOS */
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#include <SoundPlayer.h>
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#include "../../main/beos/SDL_BeApp.h"
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extern "C"
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{
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#include "SDL_audio.h"
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#include "../SDL_audio_c.h"
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#include "../SDL_sysaudio.h"
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#include "../../thread/beos/SDL_systhread_c.h"
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#include "SDL_beaudio.h"
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/* Audio driver functions */
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static int BE_OpenAudio(_THIS, SDL_AudioSpec * spec);
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static void BE_WaitAudio(_THIS);
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static void BE_PlayAudio(_THIS);
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static Uint8 *BE_GetAudioBuf(_THIS);
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static void BE_CloseAudio(_THIS);
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/* Audio driver bootstrap functions */
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static int Audio_Available(void)
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{
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return (1);
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}
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static void Audio_DeleteDevice(SDL_AudioDevice * device)
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{
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SDL_free(device->hidden);
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SDL_free(device);
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}
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static SDL_AudioDevice *Audio_CreateDevice(int devindex)
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{
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SDL_AudioDevice *device;
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/* Initialize all variables that we clean on shutdown */
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device = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice));
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if (device) {
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SDL_memset(device, 0, (sizeof *device));
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device->hidden = (struct SDL_PrivateAudioData *)
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SDL_malloc((sizeof *device->hidden));
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}
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if ((device == NULL) || (device->hidden == NULL)) {
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SDL_OutOfMemory();
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if (device) {
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SDL_free(device);
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}
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return (0);
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}
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SDL_memset(device->hidden, 0, (sizeof *device->hidden));
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/* Set the function pointers */
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device->OpenAudio = BE_OpenAudio;
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device->WaitAudio = BE_WaitAudio;
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device->PlayAudio = BE_PlayAudio;
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device->GetAudioBuf = BE_GetAudioBuf;
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device->CloseAudio = BE_CloseAudio;
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device->free = Audio_DeleteDevice;
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return device;
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}
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AudioBootStrap BAUDIO_bootstrap = {
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"baudio", "BeOS BSoundPlayer",
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Audio_Available, Audio_CreateDevice
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};
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/* The BeOS callback for handling the audio buffer */
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static void FillSound(void *device, void *stream, size_t len,
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const media_raw_audio_format & format)
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{
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SDL_AudioDevice *audio = (SDL_AudioDevice *) device;
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/* Silence the buffer, since it's ours */
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SDL_memset(stream, audio->spec.silence, len);
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/* Only do soemthing if audio is enabled */
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if (!audio->enabled)
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return;
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if (!audio->paused) {
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if (audio->convert.needed) {
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SDL_mutexP(audio->mixer_lock);
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(*audio->spec.callback) (audio->spec.userdata,
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(Uint8 *) audio->convert.buf,
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audio->convert.len);
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SDL_mutexV(audio->mixer_lock);
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SDL_ConvertAudio(&audio->convert);
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SDL_memcpy(stream, audio->convert.buf,
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audio->convert.len_cvt);
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} else {
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SDL_mutexP(audio->mixer_lock);
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(*audio->spec.callback) (audio->spec.userdata,
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(Uint8 *) stream, len);
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SDL_mutexV(audio->mixer_lock);
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}
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}
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return;
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}
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/* Dummy functions -- we don't use thread-based audio */
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void BE_WaitAudio(_THIS)
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{
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return;
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}
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void BE_PlayAudio(_THIS)
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{
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return;
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}
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Uint8 *BE_GetAudioBuf(_THIS)
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{
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return (NULL);
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}
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void BE_CloseAudio(_THIS)
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{
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if (audio_obj) {
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audio_obj->Stop();
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delete audio_obj;
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audio_obj = NULL;
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}
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/* Quit the Be Application, if there's nothing left to do */
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SDL_QuitBeApp();
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}
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int BE_OpenAudio(_THIS, SDL_AudioSpec * spec)
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{
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media_raw_audio_format format;
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SDL_AudioFormat test_format = SDL_FirstAudioFormat(spec->format);
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int valid_datatype = 0;
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/* Parse the audio format and fill the Be raw audio format */
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memset(&format, '\0', sizeof (media_raw_audio_format));
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format.byte_order = B_MEDIA_LITTLE_ENDIAN;
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format.frame_rate = (float) spec->freq;
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format.channel_count = spec->channels; /* !!! FIXME: support > 2? */
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while ((!valid_datatype) && (test_format)) {
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spec->format = test_format;
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switch (test_format) {
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case AUDIO_S8:
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valid_datatype = 1;
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format.format = media_raw_audio_format::B_AUDIO_CHAR;
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break;
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case AUDIO_U8:
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valid_datatype = 1;
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format.format = media_raw_audio_format::B_AUDIO_UCHAR;
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break;
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case AUDIO_S16LSB:
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valid_datatype = 1;
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format.format = media_raw_audio_format::B_AUDIO_SHORT;
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break;
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case AUDIO_S16MSB:
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valid_datatype = 1;
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format.format = media_raw_audio_format::B_AUDIO_SHORT;
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format.byte_order = B_MEDIA_BIG_ENDIAN;
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break;
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case AUDIO_S32LSB:
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valid_datatype = 1;
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format.format = media_raw_audio_format::B_AUDIO_INT;
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break;
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case AUDIO_S32MSB:
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valid_datatype = 1;
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format.format = media_raw_audio_format::B_AUDIO_INT;
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format.byte_order = B_MEDIA_BIG_ENDIAN;
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break;
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case AUDIO_F32LSB:
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valid_datatype = 1;
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format.format = media_raw_audio_format::B_AUDIO_FLOAT;
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break;
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case AUDIO_F32MSB:
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valid_datatype = 1;
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format.format = media_raw_audio_format::B_AUDIO_FLOAT;
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format.byte_order = B_MEDIA_BIG_ENDIAN;
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break;
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default:
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test_format = SDL_NextAudioFormat();
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break;
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}
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}
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format.buffer_size = spec->samples;
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if (!valid_datatype) { /* shouldn't happen, but just in case... */
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SDL_SetError("Unsupported audio format");
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return (-1);
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}
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/* Initialize the Be Application, if it's not already started */
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if (SDL_InitBeApp() < 0) {
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return (-1);
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}
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/* Calculate the final parameters for this audio specification */
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SDL_CalculateAudioSpec(spec);
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/* Subscribe to the audio stream (creates a new thread) */
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{
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sigset_t omask;
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SDL_MaskSignals(&omask);
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audio_obj = new BSoundPlayer(&format, "SDL Audio", FillSound,
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NULL, _this);
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SDL_UnmaskSignals(&omask);
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}
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if (audio_obj->Start() == B_NO_ERROR) {
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audio_obj->SetHasData(true);
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} else {
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SDL_SetError("Unable to start Be audio");
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return (-1);
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}
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/* We're running! */
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return (1);
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}
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}; /* Extern C */
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/* vi: set ts=4 sw=4 expandtab: */
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