Diff: audio_if.cpp

Revision:

0:3eee9435dd17

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/audio_if.cpp	Sun Dec 13 19:12:11 2015 +0000
@@ -0,0 +1,188 @@
+/**
+******************************************************************************
+* @file    /Src/audio_if.c
+* @author  Central Labs
+* @version V1.0.0
+* @date    7-May-2015
+* @brief   USB Device Audio interface file.
+******************************************************************************
+@attention
+*
+* <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
+*
+* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+* You may not use this file except in compliance with the License.
+* You may obtain a copy of the License at:
+*
+*        http://www.st.com/software_license_agreement_liberty_v2
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*   1. Redistributions of source code must retain the above copyright notice,
+*      this list of conditions and the following disclaimer.
+*   2. Redistributions in binary form must reproduce the above copyright notice,
+*      this list of conditions and the following disclaimer in the documentation
+*      and/or other materials provided with the distribution.
+*   3. Neither the name of STMicroelectronics nor the names of its contributors
+*      may be used to endorse or promote products derived from this software
+*      without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+*/
+
+/* Includes ------------------------------------------------------------------*/
+#include "audio_if.h"
+
+//uint16_t PDM_Buffer[AUDIO_CHANNELS*AUDIO_SAMPLING_FREQUENCY/1000*64/8];
+//static uint16_t PCM_Buffer[AUDIO_CHANNELS*AUDIO_SAMPLING_FREQUENCY/1000];
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+
+
+/* Private functions ---------------------------------------------------------*/
+/* This table maps the audio device class setting in 1/256 dB to a
+* linear 0-64 scaling used in pdm_filter.c. It is computed as
+* 256*20*log10(index/64). */
+//const int16_t vol_table[65] =
+//{ 0x8000, 0xDBE0, 0xE1E6, 0xE56B, 0xE7EB, 0xE9DB, 0xEB70, 0xECC7,
+//0xEDF0, 0xEEF6, 0xEFE0, 0xF0B4, 0xF176, 0xF228, 0xF2CD, 0xF366,
+//0xF3F5, 0xF47C, 0xF4FB, 0xF574, 0xF5E6, 0xF652, 0xF6BA, 0xF71C,
+//0xF778, 0xF7D6, 0xF82D, 0xF881, 0xF8D2, 0xF920, 0xF96B, 0xF9B4,
+//0xF9FB, 0xFA3F, 0xFA82, 0xFAC2, 0xFB01, 0xFB3E, 0xFB79, 0xFBB3,
+//0xFBEB, 0xFC22, 0xFC57, 0xFC8C, 0xFCBF, 0xFCF1, 0xFD22, 0xFD51,
+//0xFD80, 0xFDAE, 0xFDDB, 0xFE07, 0xFE32, 0xFE5D, 0xFE86, 0xFEAF,
+//0xFED7, 0xFF00, 0xFF25, 0xFF4B, 0xFF70, 0xFF95, 0xFFB9, 0xFFD0,
+//0x0000 };
+
+//volatile uint8_t VolumeSetting=64;
+
+/**
+* @brief  Initializes the AUDIO media low layer.
+* @param  AudioFreq: Audio frequency used to play the audio stream.
+* @param  BitRes: desired bit resolution
+* @param  ChnlNbr: number of channel to be configured
+* @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
+*/
+int8_t Audio_Init(void)
+{
+    return BSP_AUDIO_IN_Init(48000, 16, 1);
+}
+
+
+
+/**
+* @brief  Start audio recording engine
+* @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
+*/
+int8_t Audio_Record(uint16_t * recbuff)
+{
+	int8_t res = BSP_AUDIO_IN_Record(recbuff, 2048);
+//	AudioProcess(pbuf, recbuff);
+	return res;
+}
+
+/**
+* @brief  Controls AUDIO Volume.             
+* @param  vol: Volume level
+* @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
+*/
+//int8_t Audio_VolumeCtl(int16_t Volume)
+//{
+//  /* Call low layer volume setting function */
+//  int j;
+//  
+//  j = 0;
+//  /* Find the setting nearest to the desired setting */
+//  while(j<64 &&
+//        abs(Volume-vol_table[j]) > abs(Volume-vol_table[j+1])) {
+//          j++;
+//        }
+//  /* Now do the volume adjustment */
+//  VolumeSetting = (uint8_t)j; 
+//  return BSP_AUDIO_IN_SetVolume(VolumeSetting);
+//
+//  
+//}
+
+/**
+* @brief  Controls AUDIO Mute.              
+* @param  cmd: Command opcode
+* @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
+*/
+//int8_t Audio_MuteCtl(uint8_t cmd)
+//{
+//  return AUDIO_OK;
+//}
+
+
+/**
+* @brief  Stops audio acquisition
+* @param  none
+* @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
+*/
+int8_t Audio_Stop(void)
+{  
+	return BSP_AUDIO_IN_Stop();
+
+}
+
+/**
+* @brief  Pauses audio acquisition
+* @param  none
+* @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
+*/
+//
+//int8_t Audio_Pause(void)
+//{
+//  return 0;
+//}
+
+
+/**
+* @brief  Resumes audio acquisition
+* @param  none
+* @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
+*/
+//int8_t Audio_Resume(void)
+//{  
+//  return AUDIO_OK;
+//}
+
+/**
+* @brief  Manages command from usb
+* @param  None
+* @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
+*/
+//
+//int8_t Audio_CommandMgr(uint8_t cmd)
+//{
+//  return AUDIO_OK;
+//}
+//
+//void AudioProcess(uint16_t * pbuf, uint16_t * recbuff)
+//{
+//  BSP_AUDIO_IN_PDMToPCM(pbuf,recbuff);
+//  // need to copy recbuff to final output buff (in chunks)
+//}
+
+
+
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+