1. #include <alsa/asoundlib.h>
  2. #include <cmath>
  3. #include <cstdio>
  4. #include <stdint.h>
  5. #include <vector>
  6. #include <iostream>
  8. snd_pcm_t *pcm_handle;
  9. using std::vector;
  11. typedef struct wavHeader
  12. {
  13. char RIFF[4]; /* RIFF Header */ //Magic header
  14. uint32_t ChunkSize; /* RIFF Chunk Size */
  15. char WAVE[4]; /* WAVE Header */
  16. char fmt[4]; /* FMT header */
  17. uint32_t Subchunk1Size; /* Size of the fmt chunk*/
  18. int16_t AudioFormat; /* Audio format 1=PCM,6=mulaw,7=alaw, 257=IBM Mu-Law, 258=IBM A-Law, 259=ADPCM */
  19. int16_t NumOfChannels; /* Number of channels 1=Mono 2=Sterio */
  20. uint32_t SamplesPerSec; /* Sampling Frequency in Hz */
  21. uint32_t bytesPerSec; /* bytes per second */
  22. int16_t blockAlign; /* 2=16-bit mono, 4=16-bit stereo */
  23. int16_t bitsPerSample; /* Number of bits per sample */
  24. char Subchunk2ID[4]; /* "data" string */
  25. uint32_t Subchunk2Size; /* Sampled data length */
  26. char data[1];
  27. } wavHeader;
  29. vector<wavHeader*> loaded_sounds;
  31. bool sound_add(const char *filename) {
  32. FILE *file;
  34. if ((file = fopen(filename,"rb")) == NULL)
  35. printf("ERROR: Can't open: %s", filename);
  37. fseek(file, 0, SEEK_END);
  38. size_t flen = ftell(file);
  39. fseek(file, 0, SEEK_SET);
  40. char *wavfile = new char[flen];
  41. fread(wavfile, 1, flen, file);
  42. wavHeader *wavhead = (wavHeader*)wavfile;
  44. loaded_sounds.push_back(wavhead);
  45. return 0;
  46. }
  48. bool sound_play() {
  50. unsigned int pcm;
  51. int rate, channels, seconds;
  52. snd_pcm_t *pcm_handle;
  53. snd_pcm_hw_params_t *params;
  55. /* Open the PCM device in playback mode */
  56. if (pcm = snd_pcm_open(&pcm_handle, "default",SND_PCM_STREAM_PLAYBACK, 0) < 0)
  57. printf("ERROR: Can't open \"%s\" PCM device. %s\n","default", snd_strerror(pcm));
  59. /* Allocate parameters object and fill it with default values*/
  60. snd_pcm_hw_params_alloca(&params);
  61. snd_pcm_hw_params_any(pcm_handle, params);
  63. /* Set parameters */
  64. if (pcm = snd_pcm_hw_params_set_access(pcm_handle, params,SND_PCM_ACCESS_RW_INTERLEAVED) < 0)
  65. printf("ERROR: Can't set interleaved mode. %s\n", snd_strerror(pcm));
  67. if (pcm = snd_pcm_hw_params_set_format(pcm_handle, params,SND_PCM_FORMAT_S16_LE) < 0)
  68. printf("ERROR: Can't set format. %s\n", snd_strerror(pcm));
  70. if (pcm = snd_pcm_hw_params_set_channels(pcm_handle, params, 1) < 0)
  71. printf("ERROR: Can't set channels number. %s\n", snd_strerror(pcm));
  73. snd_pcm_hw_params_set_rate_near(pcm_handle, params, &loaded_sounds[0]->SamplesPerSec, NULL);
  75. /* Write parameters */
  76. if (pcm = snd_pcm_hw_params(pcm_handle, params) < 0)
  78. printf("ERROR: Can't set harware parameters. %s\n", snd_strerror(pcm));
  81. snd_pcm_writei(pcm_handle,loaded_sounds[0]->data, loaded_sounds[0]->Subchunk2Size / loaded_sounds[0]->bitsPerSample * 8);
  82. snd_pcm_prepare(pcm_handle);
  83. return 0;
  84. }
  86. int main() {
  87. sound_add("/home/greg/test.wav");
  88. sound_play();
  89. return 0;
  90. }