pinebuds/apps/audioplayers/wavplay.cpp

/***************************************************************************
 *
 * Copyright 2015-2019 BES.
 * All rights reserved. All unpublished rights reserved.
 *
 * No part of this work may be used or reproduced in any form or by any
 * means, or stored in a database or retrieval system, without prior written
 * permission of BES.
 *
 * Use of this work is governed by a license granted by BES.
 * This work contains confidential and proprietary information of
 * BES. which is protected by copyright, trade secret,
 * trademark and other intellectual property rights.
 *
 ****************************************************************************/
#ifdef MBED
#include "mbed.h"
#endif
// Standard C Included Files
#include <math.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "hal_timer.h"
#include "hal_trace.h"
#include "hal_uart.h"

/*!
 *  * @brief Standard Winodws PCM wave file header length
 *   */
#define WAVE_FILE_HEADER_SIZE 0x2CU

typedef struct wave_header {
  uint8_t riff[4];
  uint32_t size;
  uint8_t waveFlag[4];
  uint8_t fmt[4];
  uint32_t fmtLen;
  uint16_t tag;
  uint16_t channels;
  uint32_t sampFreq;
  uint32_t byteRate;
  uint16_t blockAlign;
  uint16_t bitSamp;
  uint8_t dataFlag[4];
  uint32_t length;
} wave_header_t;

/*!
 *  * @brief Wave file structure
 *   */
typedef struct wave_file {
  wave_header_t header;
  uint32_t *data;
} wave_file_t;

/* player */
static unsigned int g_total_play_count = 0;
static unsigned int g_curr_play_index = 0;

/* wave */
wave_file_t g_wave_file_info;
static char g_wav_header[WAVE_FILE_HEADER_SIZE];
FILE *g_wave_file_handle = NULL;
static int32_t (*wav_file_playback_callback)(int32_t) = NULL;

////////////////////////////////////////////////////////////////////////////////
// Code
////////////////////////////////////////////////////////////////////////////////
void wav_file_set_playeback_cb(int32_t (*cb)(int32_t)) {
  wav_file_playback_callback = cb;
}
bool wav_file_isplaydone(void) {
  return (g_curr_play_index >= g_total_play_count) ? true : false;
}
uint32_t wav_file_audio_more_data(uint8_t *buf, uint32_t len) {
  //    static uint32_t g_preIrqTime = 0;
  uint32_t reallen = 0;
  //    int32_t stime,etime;
  int32_t status;

  /* play done ? */
  if (wav_file_isplaydone()) {
    memset(buf, 0, len);
    status = 0;
    if (wav_file_playback_callback)
      wav_file_playback_callback(status);
    return (len);
  }
  //    stime = hal_sys_timer_get();
  /* read file */
  if (g_wave_file_handle)
    reallen = fread(buf, 1, len, g_wave_file_handle);
  //    etime = hal_sys_timer_get();
  if (reallen != len) {
    memset(buf, 0, len);
    status = -1;
    if (wav_file_playback_callback)
      wav_file_playback_callback(status);
    return (len);
  }

  //  TRACE(5,"wav_file_audio_more_data irqDur:%d fsSpend:%d, readbuff:0x%08x
  //  %d/%d\n ", TICKS_TO_MS(stime - g_preIrqTime),TICKS_TO_MS(etime -
  //  stime),buf,reallen,len);
  //    g_preIrqTime = stime;

  /* walk index */
  g_curr_play_index += reallen;

  return reallen;
}

uint32_t get_wav_data(wave_file_t *waveFile) {
  uint8_t *dataTemp = (uint8_t *)waveFile->data;

  // check for RIFF
  memcpy(waveFile->header.riff, dataTemp, 4);
  dataTemp += 4;
  if (memcmp((uint8_t *)waveFile->header.riff, "RIFF", 4)) {
    return 0;
  }

  // Get size
  memcpy(&waveFile->header.size, dataTemp, 4);
  dataTemp += 4;

  TRACE(1, "WAV header size [%d]\n", waveFile->header.size);

  // .wav file flag
  memcpy(waveFile->header.waveFlag, dataTemp, 4);
  dataTemp += 4;
  if (memcmp((uint8_t *)waveFile->header.waveFlag, "WAVE", 4)) {
    return 0;
  }

  // fmt
  memcpy(waveFile->header.fmt, dataTemp, 4);
  dataTemp += 4;
  if (memcmp((uint8_t *)waveFile->header.fmt, "fmt ", 4)) {
    return 0;
  }

  // fmt length
  memcpy(&waveFile->header.fmtLen, dataTemp, 4);
  dataTemp += 4;

  // Tag: PCM or not
  memcpy(&waveFile->header.tag, dataTemp, 4);
  dataTemp += 2;

  // Channels
  memcpy(&waveFile->header.channels, dataTemp, 4);
  dataTemp += 2;

  TRACE(1, "WAV channels [%d]\n", waveFile->header.channels);

  // Sample Rate in Hz
  memcpy(&waveFile->header.sampFreq, dataTemp, 4);
  dataTemp += 4;
  memcpy(&waveFile->header.byteRate, dataTemp, 4);
  dataTemp += 4;

  TRACE(1, "WAV sample_rate [%d]\n", waveFile->header.sampFreq);
  TRACE(1, "WAV byteRate [%d]\n", waveFile->header.byteRate);

  // quantize bytes for per samp point
  memcpy(&waveFile->header.blockAlign, dataTemp, 4);
  dataTemp += 2;
  memcpy(&waveFile->header.bitSamp, dataTemp, 4);
  dataTemp += 2;

  TRACE(1, "WAV bitSamp [%d]\n", waveFile->header.bitSamp);

  // Data
  memcpy(waveFile->header.dataFlag, dataTemp, 4);
  dataTemp += 4;
  if (memcmp((uint8_t *)waveFile->header.dataFlag, "data ", 4)) {
    return 0;
  }
  memcpy(&waveFile->header.length, dataTemp, 4);
  dataTemp += 4;

  return 0;
}

void audio_wav_init(wave_file_t *newWav) {
  get_wav_data(newWav);

  // Configure the play audio g_format
  // g_format.bits = newWav->header.bitSamp;
  // g_format.sample_rate = newWav->header.sampFreq;
  // g_format.mclk = 256 * g_format.sample_rate ;
  // g_format.mono_streo = (sai_mono_streo_t)((newWav->header.channels) - 1);
}

uint32_t play_wav_file(char *file_path) {
  uint32_t bytesToRead = 0;

  wave_file_t *newWav = &g_wave_file_info;

  memset(&g_wave_file_info, 0, sizeof(g_wave_file_info));

  g_wave_file_handle = fopen(file_path, "rb");

  if (g_wave_file_handle == NULL) {
    TRACE(1, "WAV file %s open fail\n", file_path);
    return 1;
  }

  fread(&g_wav_header, WAVE_FILE_HEADER_SIZE, 1, g_wave_file_handle);

  newWav->data = (uint32_t *)&g_wav_header;

  audio_wav_init(newWav);

  // Remove header size from byte count
  // Adjust note duration by divider value, wav tables in pcm_data.h are 200ms
  // by default
  bytesToRead = (newWav->header.length - WAVE_FILE_HEADER_SIZE);

  g_curr_play_index = 0;
  g_total_play_count = bytesToRead;

  return newWav->header.sampFreq;
}

uint32_t stop_wav_file(void) {
  memset(&g_wave_file_info, 0, sizeof(g_wave_file_info));
  g_curr_play_index = 0;
  g_total_play_count = 0;
  if (g_wave_file_handle) {
    fclose(g_wave_file_handle);
    g_wave_file_handle = NULL;
  }
  if (wav_file_playback_callback)
    wav_file_playback_callback = NULL;

  return 0;
}