tsk_audio.c
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上传日期:2008-01-29
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文件大小:6k
- /*
- * Copyright 2003 by Texas Instruments Incorporated.
- * All rights reserved. Property of Texas Instruments Incorporated.
- * Restricted rights to use, duplicate or disclose this code are
- * granted through contract.
- *
- */
- /* "@(#) DDK 1.10.00.23 07-02-03 (ddk-b12)" */
- /*
- * ======== tsk_audio.c ========
- *
- * This example demonstrates the use of IOM drivers with SIOs and tasks by
- * using the DIO class driver with a user defined device mini-driver
- * called "codec" and a class driver DIO instance called "dio_codec". This is
- * the loopback application where audio is read from an input SIO, then sent
- * back via an output SIO.
- * The following objects need to be created in the DSP/BIOS
- * configuration for this application:
- *
- * * A UDEV object, which links in a user device driver. In this
- * case the UDEV is a codec based IOM device driver.
- * * A DIO object, which links the UDEV object.
- * * A TSK object, with the function to run set to the function echo
- * defined in this file.
- * * A LOG named trace for debug and status output.
- */
- #include <std.h>
- #include <log.h>
- #include <sys.h>
- #include <mem.h>
- #include <sio.h>
- #ifdef _6x_
- extern far LOG_Obj trace;
- /*
- * Buffers placed in external memory are aligned on a 128 bytes boundary.
- * In addition, the buffer should be of a size multiple of 128 bytes for
- * the cache work optimally on the C6x.
- */
- #define BUFLEN 128 /* number of samples in the frame */
- #define BUFALIGN 128 /* alignment of buffer to allow use of L2 cache */
- #else
- extern LOG_Obj trace;
- #define BUFLEN 128 /* number of samples in the frame */
- #define BUFALIGN 1
- #endif
- #define BUFSIZE (BUFLEN * sizeof(MdUns))
- /* inStream and outStream are SIO handles created in main */
- SIO_Handle inStream, outStream;
- /* Function prototype */
- static Void createStreams();
- static Void prime();
- /*
- * ======== main ========
- */
- Void main()
- {
- LOG_printf(&trace, "tsk_audio started");
- }
- /*
- * ======== createStreams ========
- */
- static Void createStreams()
- {
- SIO_Attrs attrs;
-
- /* align the buffer to allow it to be used with L2 cache */
- attrs = SIO_ATTRS;
- attrs.align = BUFALIGN;
- attrs.model = SIO_ISSUERECLAIM;
- /* open the I/O streams */
- inStream = SIO_create("/dioCodec", SIO_INPUT, BUFSIZE, &attrs);
- if (inStream == NULL) {
- SYS_abort("Create input stream FAILED.");
- }
- outStream = SIO_create("/dioCodec", SIO_OUTPUT, BUFSIZE, &attrs);
- if (outStream == NULL) {
- SYS_abort("Create output stream FAILED.");
- }
- }
- /*
- * ======== prime ========
- */
- static Void prime()
- {
- Ptr buf0, buf1, buf2, buf3;
- LOG_printf(&trace, "Allocate buffers started");
- /* Allocate buffers for the SIO buffer exchanges */
- buf0 = (Ptr)MEM_calloc(0, BUFSIZE, BUFALIGN);
- buf1 = (Ptr)MEM_calloc(0, BUFSIZE, BUFALIGN);
- buf2 = (Ptr)MEM_calloc(0, BUFSIZE, BUFALIGN);
- buf3 = (Ptr)MEM_calloc(0, BUFSIZE, BUFALIGN);
- if (buf0 == NULL || buf1 == NULL || buf2 == NULL || buf3 == NULL) {
- SYS_abort("MEM_calloc failed.");
- }
-
- /* Issue the first & second empty buffers to the input stream */
- if (SIO_issue(inStream, buf0, SIO_bufsize(inStream), NULL) != SYS_OK) {
- SYS_abort("Error issuing buffer to the input stream");
- }
- if (SIO_issue(inStream, buf1, SIO_bufsize(inStream), NULL) != SYS_OK) {
- SYS_abort("Error issuing buffer to the input stream");
- }
- /* Issue the first & second empty buffers to the output stream */
- if (SIO_issue(outStream, buf2, SIO_bufsize(outStream), NULL) != SYS_OK) {
- SYS_abort("Error issuing buffer to the output stream");
- }
- if (SIO_issue(outStream, buf3, SIO_bufsize(outStream), NULL) != SYS_OK) {
- SYS_abort("Error issuing buffer to the output stream");
- }
- }
- /*
- * ======== echo ========
- * This function copies from the input SIO to the output SIO. You could
- * easily replace the copy function with a signal processing algorithm.
- */
- Void echo()
- {
- Int i;
- Int nmadus; /* number of minimal addressable units */
- MdUns *inbuf, *outbuf;
- /* Call createStream function to create I/O streams */
- createStreams();
-
- /* Call prime function to do priming */
- prime();
- /* Loop forever looping back buffers */
- for (;;) {
- /* Reclaim full buffer from the input stream */
- if ((nmadus = SIO_reclaim(inStream, (Ptr *)&inbuf, NULL)) < 0) {
- SYS_abort("Error reclaiming full buffer from the input stream");
- }
- /* Reclaim empty buffer from the output stream to be reused */
- if (SIO_reclaim(outStream, (Ptr *)&outbuf, NULL) < 0) {
- SYS_abort("Error reclaiming empty buffer from the output stream");
- }
- /* Do the data move. */
- for (i = 0; i < (nmadus / sizeof(short)); i++) {
- outbuf[i] = inbuf[i];
- }
- /* Issue full buffer to the output stream */
- if (SIO_issue(outStream, outbuf, nmadus, NULL) != SYS_OK) {
- SYS_abort("Error issuing full buffer to the output stream");
- }
- /* Issue an empty buffer to the input stream */
- if (SIO_issue(inStream, inbuf, SIO_bufsize(inStream), NULL) != SYS_OK) {
- SYS_abort("Error issuing empty buffer to the input stream");
- }
- }
- }
- /*
- * ======== prd10secs ========
- * prd10secs is configured to be called every 10 seconds
- */
- Void prd10secs()
- {
- static Int seconds = 0;
- static Int minutes = 0;
- static Int hours = 0;
- seconds += 10;
- if (seconds == 60) {
- seconds = 0;
- minutes++;
- if (minutes == 60) {
- minutes = 0;
- hours++;
- }
- LOG_printf(&trace, "%d hours and %d minutes", hours, minutes);
- }
- else {
- LOG_printf(&trace, "%d seconds", seconds);
- }
- }