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Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/amigaos/SDL_ahiaudio.c')
-rw-r--r--distrib/sdl-1.2.12/src/audio/amigaos/SDL_ahiaudio.c337
1 files changed, 337 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/amigaos/SDL_ahiaudio.c b/distrib/sdl-1.2.12/src/audio/amigaos/SDL_ahiaudio.c
new file mode 100644
index 0000000..c9a4c1a
--- /dev/null
+++ b/distrib/sdl-1.2.12/src/audio/amigaos/SDL_ahiaudio.c
@@ -0,0 +1,337 @@
+/*
+ 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
+*/
+#include "SDL_config.h"
+
+/* Allow access to a raw mixing buffer (for AmigaOS) */
+
+#include "SDL_audio.h"
+#include "../SDL_audio_c.h"
+#include "SDL_ahiaudio.h"
+
+/* Audio driver functions */
+static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec);
+static void AHI_WaitAudio(_THIS);
+static void AHI_PlayAudio(_THIS);
+static Uint8 *AHI_GetAudioBuf(_THIS);
+static void AHI_CloseAudio(_THIS);
+
+#ifndef __SASC
+ #define mymalloc(x) AllocVec(x,MEMF_PUBLIC)
+ #define myfree FreeVec
+#else
+ #define mymalloc malloc
+ #define myfree free
+#endif
+
+/* Audio driver bootstrap functions */
+
+static int Audio_Available(void)
+{
+ int ok=0;
+ struct MsgPort *p;
+ struct AHIRequest *req;
+
+ if(p=CreateMsgPort())
+ {
+ if(req=(struct AHIRequest *)CreateIORequest(p,sizeof(struct AHIRequest)))
+ {
+ req->ahir_Version=4;
+
+ if(!OpenDevice(AHINAME,0,(struct IORequest *)req,NULL))
+ {
+ D(bug("AHI available.\n"));
+ ok=1;
+ CloseDevice((struct IORequest *)req);
+ }
+ DeleteIORequest((struct IORequest *)req);
+ }
+ DeleteMsgPort(p);
+ }
+
+ D(if(!ok) bug("AHI not available\n"));
+ return ok;
+}
+
+static void Audio_DeleteDevice(SDL_AudioDevice *device)
+{
+ SDL_free(device->hidden);
+ SDL_free(device);
+}
+
+static SDL_AudioDevice *Audio_CreateDevice(int devindex)
+{
+ SDL_AudioDevice *this;
+
+#ifndef NO_AMIGADEBUG
+ D(bug("AHI created...\n"));
+#endif
+
+ /* 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 = AHI_OpenAudio;
+ this->WaitAudio = AHI_WaitAudio;
+ this->PlayAudio = AHI_PlayAudio;
+ this->GetAudioBuf = AHI_GetAudioBuf;
+ this->CloseAudio = AHI_CloseAudio;
+
+ this->free = Audio_DeleteDevice;
+
+ return this;
+}
+
+AudioBootStrap AHI_bootstrap = {
+ "AHI", Audio_Available, Audio_CreateDevice
+};
+
+
+void static AHI_WaitAudio(_THIS)
+{
+ if(!CheckIO((struct IORequest *)audio_req[current_buffer]))
+ {
+ WaitIO((struct IORequest *)audio_req[current_buffer]);
+// AbortIO((struct IORequest *)audio_req[current_buffer]);
+ }
+}
+
+static void AHI_PlayAudio(_THIS)
+{
+ if(playing>1)
+ WaitIO((struct IORequest *)audio_req[current_buffer]);
+
+ /* Write the audio data out */
+ audio_req[current_buffer] -> ahir_Std. io_Message.mn_Node.ln_Pri = 60;
+ audio_req[current_buffer] -> ahir_Std. io_Data = mixbuf[current_buffer];
+ audio_req[current_buffer] -> ahir_Std. io_Length = this->hidden->size;
+ audio_req[current_buffer] -> ahir_Std. io_Offset = 0;
+ audio_req[current_buffer] -> ahir_Std . io_Command = CMD_WRITE;
+ audio_req[current_buffer] -> ahir_Frequency = this->hidden->freq;
+ audio_req[current_buffer] -> ahir_Volume = 0x10000;
+ audio_req[current_buffer] -> ahir_Type = this->hidden->type;
+ audio_req[current_buffer] -> ahir_Position = 0x8000;
+ audio_req[current_buffer] -> ahir_Link = (playing>0 ? audio_req[current_buffer^1] : NULL);
+
+ SendIO((struct IORequest *)audio_req[current_buffer]);
+ current_buffer^=1;
+
+ playing++;
+}
+
+static Uint8 *AHI_GetAudioBuf(_THIS)
+{
+ return(mixbuf[current_buffer]);
+}
+
+static void AHI_CloseAudio(_THIS)
+{
+ D(bug("Closing audio...\n"));
+
+ playing=0;
+
+ if(audio_req[0])
+ {
+ if(audio_req[1])
+ {
+ D(bug("Break req[1]...\n"));
+
+ AbortIO((struct IORequest *)audio_req[1]);
+ WaitIO((struct IORequest *)audio_req[1]);
+ }
+
+ D(bug("Break req[0]...\n"));
+
+ AbortIO((struct IORequest *)audio_req[0]);
+ WaitIO((struct IORequest *)audio_req[0]);
+
+ if(audio_req[1])
+ {
+ D(bug("Break AGAIN req[1]...\n"));
+ AbortIO((struct IORequest *)audio_req[1]);
+ WaitIO((struct IORequest *)audio_req[1]);
+ }
+// Double abort to be sure to break the dbuffering process.
+
+ SDL_Delay(200);
+
+ D(bug("Reqs breaked, closing device...\n"));
+ CloseDevice((struct IORequest *)audio_req[0]);
+ D(bug("Device closed, freeing memory...\n"));
+ myfree(audio_req[1]);
+ D(bug("Memory freed, deleting IOReq...\n"));
+ DeleteIORequest((struct IORequest *)audio_req[0]);
+ audio_req[0]=audio_req[1]=NULL;
+ }
+
+ D(bug("Freeing mixbuf[0]...\n"));
+ if ( mixbuf[0] != NULL ) {
+ myfree(mixbuf[0]);
+// SDL_FreeAudioMem(mixbuf[0]);
+ mixbuf[0] = NULL;
+ }
+
+ D(bug("Freeing mixbuf[1]...\n"));
+ if ( mixbuf[1] != NULL ) {
+ myfree(mixbuf[1]);
+// SDL_FreeAudioMem(mixbuf[1]);
+ mixbuf[1] = NULL;
+ }
+
+ D(bug("Freeing audio_port...\n"));
+
+ if ( audio_port != NULL ) {
+ DeleteMsgPort(audio_port);
+ audio_port = NULL;
+ }
+ D(bug("...done!\n"));
+}
+
+static int AHI_OpenAudio(_THIS, SDL_AudioSpec *spec)
+{
+// int width;
+
+ D(bug("AHI opening...\n"));
+
+ /* Determine the audio parameters from the AudioSpec */
+ switch ( spec->format & 0xFF ) {
+
+ case 8: { /* Signed 8 bit audio data */
+ D(bug("Samples a 8 bit...\n"));
+ spec->format = AUDIO_S8;
+ this->hidden->bytespersample=1;
+ if(spec->channels<2)
+ this->hidden->type = AHIST_M8S;
+ else
+ this->hidden->type = AHIST_S8S;
+ }
+ break;
+
+ case 16: { /* Signed 16 bit audio data */
+ D(bug("Samples a 16 bit...\n"));
+ spec->format = AUDIO_S16MSB;
+ this->hidden->bytespersample=2;
+ if(spec->channels<2)
+ this->hidden->type = AHIST_M16S;
+ else
+ this->hidden->type = AHIST_S16S;
+ }
+ break;
+
+ default: {
+ SDL_SetError("Unsupported audio format");
+ return(-1);
+ }
+ }
+
+ if(spec->channels!=1 && spec->channels!=2)
+ {
+ D(bug("Wrong channel number!\n"));
+ SDL_SetError("Channel number non supported");
+ return -1;
+ }
+
+ D(bug("Before CalculateAudioSpec\n"));
+ /* Update the fragment size as size in bytes */
+ SDL_CalculateAudioSpec(spec);
+
+ D(bug("Before CreateMsgPort\n"));
+
+ if(!(audio_port=CreateMsgPort()))
+ {
+ SDL_SetError("Unable to create a MsgPort");
+ return -1;
+ }
+
+ D(bug("Before CreateIORequest\n"));
+
+ if(!(audio_req[0]=(struct AHIRequest *)CreateIORequest(audio_port,sizeof(struct AHIRequest))))
+ {
+ SDL_SetError("Unable to create an AHIRequest");
+ DeleteMsgPort(audio_port);
+ return -1;
+ }
+
+ audio_req[0]->ahir_Version = 4;
+
+ if(OpenDevice(AHINAME,0,(struct IORequest *)audio_req[0],NULL))
+ {
+ SDL_SetError("Unable to open AHI device!\n");
+ DeleteIORequest((struct IORequest *)audio_req[0]);
+ DeleteMsgPort(audio_port);
+ return -1;
+ }
+
+ D(bug("AFTER opendevice\n"));
+
+ /* Set output frequency and size */
+ this->hidden->freq = spec->freq;
+ this->hidden->size = spec->size;
+
+ D(bug("Before buffer allocation\n"));
+
+ /* Allocate mixing buffer */
+ mixbuf[0] = (Uint8 *)mymalloc(spec->size);
+ mixbuf[1] = (Uint8 *)mymalloc(spec->size);
+
+ D(bug("Before audio_req allocation\n"));
+
+ if(!(audio_req[1]=mymalloc(sizeof(struct AHIRequest))))
+ {
+ SDL_OutOfMemory();
+ return(-1);
+ }
+
+ D(bug("Before audio_req memcpy\n"));
+
+ SDL_memcpy(audio_req[1],audio_req[0],sizeof(struct AHIRequest));
+
+ if ( mixbuf[0] == NULL || mixbuf[1] == NULL ) {
+ SDL_OutOfMemory();
+ return(-1);
+ }
+
+ D(bug("Before mixbuf memset\n"));
+
+ SDL_memset(mixbuf[0], spec->silence, spec->size);
+ SDL_memset(mixbuf[1], spec->silence, spec->size);
+
+ current_buffer=0;
+ playing=0;
+
+ D(bug("AHI opened: freq:%ld mixbuf:%lx/%lx buflen:%ld bits:%ld channels:%ld\n",spec->freq,mixbuf[0],mixbuf[1],spec->size,this->hidden->bytespersample*8,spec->channels));
+
+ /* We're ready to rock and roll. :-) */
+ return(0);
+}
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