--- /dev/null
+#include <exec/types.h>
+#include <exec/memory.h>
+
+#include <libraries/dos.h>
+
+#include <devices/audio.h>
+
+#include <proto/exec.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+#include "../../a314device/a314.h"
+#include "../../a314device/proto_a314.h"
+
+#include <clib/alib_protos.h>
+
+#define SERVICE_NAME "piaudio"
+
+#define FREQ 18000
+#define BUFFER_LEN_MS 50
+#define SAMPLES (FREQ * BUFFER_LEN_MS / 1000)
+
+#define R0 1
+#define L0 2
+#define L1 4
+#define R1 8
+
+#define LEFT_CHAN_MASK (L0 | L1)
+#define RIGHT_CHAN_MASK (R0 | R1)
+
+#define LEFT 0
+#define RIGHT 1
+
+struct MsgPort *sync_mp = NULL;
+struct MsgPort *async_mp = NULL;
+
+struct A314_IORequest *sync_a314_req = NULL;
+struct A314_IORequest *write_a314_req = NULL;
+
+struct Library *A314Base;
+
+char *audio_buffers[4] = { NULL, NULL, NULL, NULL };
+
+struct IOAudio *sync_audio_req = NULL;
+struct IOAudio *async_audio_req[4] = { NULL, NULL, NULL, NULL };
+
+ULONG allocated_channels;
+
+BOOL a314_device_open = FALSE;
+BOOL audio_device_open = FALSE;
+BOOL stream_open = FALSE;
+BOOL pending_a314_write = FALSE;
+
+ULONG socket;
+int back_index = 0;
+char awbuf[8];
+
+void start_a314_cmd(struct MsgPort *reply_port, struct A314_IORequest *ior, UWORD cmd, char *buffer, int length)
+{
+ ior->a314_Request.io_Message.mn_ReplyPort = reply_port;
+ ior->a314_Request.io_Command = cmd;
+ ior->a314_Request.io_Error = 0;
+ ior->a314_Socket = socket;
+ ior->a314_Buffer = buffer;
+ ior->a314_Length = length;
+ SendIO((struct IORequest *)ior);
+}
+
+BYTE a314_connect(char *name)
+{
+ socket = time(NULL);
+ start_a314_cmd(sync_mp, sync_a314_req, A314_CONNECT, name, strlen(name));
+ Wait(1L << sync_mp->mp_SigBit);
+ GetMsg(sync_mp);
+ return sync_a314_req->a314_Request.io_Error;
+}
+
+BYTE a314_write(char *buffer, int length)
+{
+ start_a314_cmd(sync_mp, sync_a314_req, A314_WRITE, buffer, length);
+ Wait(1L << sync_mp->mp_SigBit);
+ GetMsg(sync_mp);
+ return sync_a314_req->a314_Request.io_Error;
+}
+
+BYTE a314_eos()
+{
+ start_a314_cmd(sync_mp, sync_a314_req, A314_EOS, NULL, 0);
+ Wait(1L << sync_mp->mp_SigBit);
+ GetMsg(sync_mp);
+ return sync_a314_req->a314_Request.io_Error;
+}
+
+BYTE a314_reset()
+{
+ start_a314_cmd(sync_mp, sync_a314_req, A314_RESET, NULL, 0);
+ Wait(1L << sync_mp->mp_SigBit);
+ GetMsg(sync_mp);
+ return sync_a314_req->a314_Request.io_Error;
+}
+
+void start_a314_write(char *buffer, int length)
+{
+ start_a314_cmd(async_mp, write_a314_req, A314_WRITE, buffer, length);
+ pending_a314_write = TRUE;
+}
+
+void submit_async_audio_req(int index)
+{
+ ULONG mask = ((index & 1) == LEFT) ? LEFT_CHAN_MASK : RIGHT_CHAN_MASK;
+ ULONG unit = allocated_channels & mask;
+
+ async_audio_req[index]->ioa_Request.io_Message.mn_ReplyPort = async_mp;
+ async_audio_req[index]->ioa_Request.io_Command = CMD_WRITE;
+ async_audio_req[index]->ioa_Request.io_Flags = ADIOF_PERVOL;
+ async_audio_req[index]->ioa_Request.io_Unit = (void*)unit;
+ async_audio_req[index]->ioa_Data = audio_buffers[index];
+ async_audio_req[index]->ioa_Length = SAMPLES;
+ async_audio_req[index]->ioa_Period = 197;
+ async_audio_req[index]->ioa_Volume = 64;
+ async_audio_req[index]->ioa_Cycles = 1;
+ BeginIO((struct IORequest *)async_audio_req[index]);
+}
+
+int main()
+{
+ SetTaskPri(FindTask(NULL), 50);
+
+ sync_mp = CreatePort(NULL, 0);
+ if (!sync_mp)
+ {
+ printf("Unable to create sync reply message port\n");
+ goto cleanup;
+ }
+
+ async_mp = CreatePort(NULL, 0);
+ if (!async_mp)
+ {
+ printf("Unable to create async reply message port\n");
+ goto cleanup;
+ }
+
+ sync_a314_req = (struct A314_IORequest *)CreateExtIO(sync_mp, sizeof(struct A314_IORequest));
+ write_a314_req = (struct A314_IORequest *)CreateExtIO(sync_mp, sizeof(struct A314_IORequest));
+ if (!sync_a314_req || !write_a314_req)
+ {
+ printf("Unable to create A314_IORequest\n");
+ goto cleanup;
+ }
+
+ if (OpenDevice(A314_NAME, 0, (struct IORequest *)sync_a314_req, 0))
+ {
+ printf("Unable to open a314.device\n");
+ goto cleanup;
+ }
+
+ a314_device_open = TRUE;
+
+ A314Base = &(sync_a314_req->a314_Request.io_Device->dd_Library);
+
+ memcpy(write_a314_req, sync_a314_req, sizeof(struct A314_IORequest));
+
+ audio_buffers[0] = AllocMem(SAMPLES * 2, MEMF_FAST | MEMF_CHIP | MEMF_CLEAR);
+ audio_buffers[2] = AllocMem(SAMPLES * 2, MEMF_FAST | MEMF_CHIP | MEMF_CLEAR);
+ if (!audio_buffers[0] || !audio_buffers[2])
+ {
+ printf("Unable to allocate audio buffers in A314 chip memory\n");
+ goto cleanup;
+ }
+
+ audio_buffers[1] = audio_buffers[0] + SAMPLES;
+ audio_buffers[3] = audio_buffers[2] + SAMPLES;
+
+ sync_audio_req = (struct IOAudio *)CreateExtIO(sync_mp, sizeof(struct IOAudio));
+ if (!sync_audio_req)
+ {
+ printf("Unable to allocate sync audio request\n");
+ goto cleanup;
+ }
+
+ int i;
+ for (i = 0; i < 4; i++)
+ {
+ async_audio_req[i] = AllocMem(sizeof(struct IOAudio), MEMF_PUBLIC);
+ if (!async_audio_req[i])
+ {
+ printf("Unable to allocate async audio request\n");
+ goto cleanup;
+ }
+ }
+
+ UBYTE which_channels[] = { L0 | R0, L0 | R1, L1 | R0, L1 | R1 };
+
+ sync_audio_req->ioa_Request.io_Message.mn_ReplyPort = sync_mp;
+ sync_audio_req->ioa_Request.io_Message.mn_Node.ln_Pri = 127;
+ sync_audio_req->ioa_Request.io_Command = ADCMD_ALLOCATE;
+ sync_audio_req->ioa_Request.io_Flags = ADIOF_NOWAIT;
+ sync_audio_req->ioa_AllocKey = 0;
+ sync_audio_req->ioa_Data = which_channels;
+ sync_audio_req->ioa_Length = sizeof(which_channels);
+
+ if (OpenDevice(AUDIONAME, 0, (struct IORequest *)sync_audio_req, 0))
+ {
+ printf("Unable to open audio.device\n");
+ goto cleanup;
+ }
+
+ audio_device_open = TRUE;
+
+ allocated_channels = (ULONG)sync_audio_req->ioa_Request.io_Unit;
+
+ for (i = 0; i < 4; i++)
+ memcpy(async_audio_req[i], sync_audio_req, sizeof(struct IOAudio));
+
+ if (a314_connect(SERVICE_NAME) != A314_CONNECT_OK)
+ {
+ printf("Unable to connect to piaudio service\n");
+ goto cleanup;
+ }
+
+ stream_open = TRUE;
+
+ ULONG *buf_ptrs = (ULONG *)awbuf;
+ buf_ptrs[0] = TranslateAddressA314(audio_buffers[0]);
+ buf_ptrs[1] = TranslateAddressA314(audio_buffers[2]);
+ if (a314_write(awbuf, 8) != A314_WRITE_OK)
+ {
+ printf("Unable to write buffer pointers\n");
+ goto cleanup;
+ }
+
+ printf("PiAudio started, allocated channels: L%d, R%d\n",
+ (allocated_channels & LEFT_CHAN_MASK) == L0 ? 0 : 1,
+ (allocated_channels & RIGHT_CHAN_MASK) == R0 ? 0 : 1);
+
+ sync_audio_req->ioa_Request.io_Command = CMD_STOP;
+ DoIO((struct IORequest *)sync_audio_req);
+
+ submit_async_audio_req(back_index + LEFT);
+ submit_async_audio_req(back_index + RIGHT);
+
+ sync_audio_req->ioa_Request.io_Command = CMD_START;
+ DoIO((struct IORequest *)sync_audio_req);
+
+ int pending_audio_reqs = 2;
+
+ ULONG portsig = 1L << async_mp->mp_SigBit;
+
+ printf("Press ctrl-c to exit...\n");
+
+ while (TRUE)
+ {
+ if (pending_audio_reqs <= 2)
+ {
+ back_index ^= 2;
+
+ submit_async_audio_req(back_index + LEFT);
+ submit_async_audio_req(back_index + RIGHT);
+
+ pending_audio_reqs += 2;
+
+ if (!pending_a314_write)
+ {
+ awbuf[0] = back_index == 0 ? 0 : 1;
+ start_a314_write(awbuf, 1);
+ }
+ }
+
+ ULONG signal = Wait(SIGBREAKF_CTRL_C | portsig);
+
+ if (signal & SIGBREAKF_CTRL_C)
+ break;
+ else if (signal & portsig)
+ {
+ struct Message *msg;
+ while (msg = GetMsg(async_mp))
+ {
+ if (msg == (struct Message *)write_a314_req)
+ {
+ if (write_a314_req->a314_Request.io_Error == A314_WRITE_OK)
+ pending_a314_write = FALSE;
+ else
+ goto cleanup;
+ }
+ else
+ pending_audio_reqs--;
+ }
+ }
+ }
+
+cleanup:
+ if (stream_open)
+ a314_reset();
+ if (audio_device_open)
+ CloseDevice((struct IORequest *)sync_audio_req);
+ for (i = 3; i >= 0; i--)
+ if (async_audio_req[i])
+ FreeMem(async_audio_req[i], sizeof(struct IOAudio));
+ if (sync_audio_req)
+ DeleteExtIO((struct IORequest *)sync_audio_req);
+ if (audio_buffers[2])
+ FreeMem(audio_buffers[2], SAMPLES * 2);
+ if (audio_buffers[0])
+ FreeMem(audio_buffers[0], SAMPLES * 2);
+ if (a314_device_open)
+ CloseDevice((struct IORequest *)sync_a314_req);
+ if (write_a314_req)
+ DeleteExtIO((struct IORequest *)write_a314_req);
+ if (sync_a314_req)
+ DeleteExtIO((struct IORequest *)sync_a314_req);
+ if (async_mp)
+ DeletePort(async_mp);
+ if (sync_mp)
+ DeletePort(sync_mp);
+
+ return 0;
+}
projects / pistorm / blobdiff