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VOLUME.C
资源名称：DSP-C6000-DM642DEMO.rar　[点击查看]
上传用户：dahaojd
上传日期：2008-01-29
资源大小：14357k
文件大小：3k
源码类别：

DSP编程

开发平台：

C/C++

VOLUME.C：源码内容
  1. #include "volume.h"
  3. int inp_buffer[BUF_SIZE]; /* BUF_SIZE的定义见volume.h */
  4. int out_buffer[BUF_SIZE];
  6. int *input;
  7. int *output;
  9. int volume = 1;
  11. struct PARMS str = 
  12. {
  13. 2934,9432,213,9432,&str
  14. };
  16. /***************************************************************************/
  17. /*                                                                         */
  18. /* NAME: read_signals()                                                    */
  19. /*                                                                         */
  20. /* FUNCTION: read input signal.                                            */
  21. /*                                                                         */
  22. /* PARAMETERS: none.                                                       */
  23. /*                                                                         */
  24. /* RETURN VALUE: TRUE.                                                     */
  25. /*                                                                         */
  26. /***************************************************************************/
  27. int read_signals(int *input)
  28. {
  29. /* read reference signal */
  30. /* read input signal */
  31. return(TRUE);
  32. }
  34. /***************************************************************************/
  35. /*                                                                         */
  36. /* NAME: write_buffer()                                                    */
  37. /*                                                                         */
  38. /* FUNCTION: write to the output buffer. Use the volume variable     */
  39. /*  to control the volume.                    */
  40. /*                                                                         */
  41. /* PARAMETERS: input , output, num.                                        */
  42. /*                                                                         */
  43. /* RETURN VALUE: TRUE.                                                     */
  44. /*                                                                         */
  45. /***************************************************************************/
  46. int write_buffer(int *input,int *output,int count)
  47. {
  48. while( count--)
  49. {
  50. *output++ = (*input++) * volume;
  51. }
  52. return(TRUE);
  53. }
  55. /***************************************************************************/
  56. /*                                                                         */
  57. /* NAME: main()                                                            */
  58. /*                                                                         */
  59. /* FUNCTION: Volume Control: Read input buffer    */
  60. /*           multiply by volume coeficient and write to                    */
  61. /*  output buffer.    */
  62. /*                                                                         */
  63. /* PARAMETERS: none.                                                       */
  64. /*                                                                         */
  65. /* RETURN VALUE: none.                                                     */
  66. /*                                                                         */
  67. /***************************************************************************/
  68. main()
  69. {   
  70. int num = BUF_SIZE;
  72.     while(TRUE)  /* loop forever */
  73. {               
  74. input = &inp_buffer[0]; 
  75. output = &out_buffer[0];
  76. /* read input signals from PC file */
  77. read_signals(input);
  79. /* write to output buffer  */
  80. write_buffer(input, output, num);
  81. }
  82. }