Il y avait des problèmes dans la libraire...
Dependencies: ST_FREQUENCY_DIVIDER ST_I2S USBDEVICE
Fork of X_NUCLEO_CCA02M1 by
BSP/PDM2PCMAudio.cpp
- Committer:
- davide.aliprandi@st.com
- Date:
- 2017-04-21
- Revision:
- 7:9d6a4a53e640
- Parent:
- 2:9f389fd8fb2e
- Child:
- 11:b2f7f79026e4
File content as of revision 7:9d6a4a53e640:
/** ****************************************************************************** * @file PDM2PCMAudio_class.cpp * @author AST / Software Platforms and Cloud * @version V1.0 * @date November 10th, 2016 * @brief Implementation file for the PDM2PCMAudio conversion library. ****************************************************************************** * @attention * * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2> * * 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 "PDM2PCMAudio.h" /* Variables -----------------------------------------------------------------*/ /* Demux filter. */ const uint8_t PDM2PCMAudio::_demux_filter[DEMUX_FILTER_SIZE] = { 0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x02, 0x03, 0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x02, 0x03, 0x04, 0x05, 0x04, 0x05, 0x06, 0x07, 0x06, 0x07, 0x04, 0x05, 0x04, 0x05, 0x06, 0x07, 0x06, 0x07, 0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x02, 0x03, 0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x02, 0x03, 0x04, 0x05, 0x04, 0x05, 0x06, 0x07, 0x06, 0x07, 0x04, 0x05, 0x04, 0x05, 0x06, 0x07, 0x06, 0x07, 0x08, 0x09, 0x08, 0x09, 0x0a, 0x0b, 0x0a, 0x0b, 0x08, 0x09, 0x08, 0x09, 0x0a, 0x0b, 0x0a, 0x0b, 0x0c, 0x0d, 0x0c, 0x0d, 0x0e, 0x0f, 0x0e, 0x0f, 0x0c, 0x0d, 0x0c, 0x0d, 0x0e, 0x0f, 0x0e, 0x0f, 0x08, 0x09, 0x08, 0x09, 0x0a, 0x0b, 0x0a, 0x0b, 0x08, 0x09, 0x08, 0x09, 0x0a, 0x0b, 0x0a, 0x0b, 0x0c, 0x0d, 0x0c, 0x0d, 0x0e, 0x0f, 0x0e, 0x0f, 0x0c, 0x0d, 0x0c, 0x0d, 0x0e, 0x0f, 0x0e, 0x0f }; /* Methods -------------------------------------------------------------------*/ /** * @brief Converting audio data from PDM to PCM. * @param output_buffer Pointer to output PCM buffer data. * @param input_buffer Pointer to input PDM buffer data. * @param volume Volume level (it must be in the range [0..64]). * @param decimation_factor Decimation factor (it must be either 64 or 128). * @retval COMPONENT_OK in case of success, COMPONENT_ERROR otherwise. */ status_t PDM2PCMAudio::convert(int16_t *output_buffer, uint16_t *input_buffer, uint32_t volume, uint32_t decimation_factor) { if (!(volume <= PDM2PCM_MAX_VOLUME)) error("Volume level not supported: it must be in the range [0..64].\r\n"); switch (decimation_factor) { case 64: for (uint32_t index = 0; index < _channels; index++) { #ifdef PDM2PCM_AUDIO_DEBUG _pdm2pcm_audio_signal = 1; #endif #ifdef USE_OPEN_PDM2PCM_LIBRARY Open_PDM_Filter(&((uint8_t *) input_buffer)[index], (uint16_t *) &(output_buffer[index]), volume, (TPDMFilter_InitStruct *) &_PDM2PCM_filter[index]); index++; #else PDM_Filter_64_LSB(&((uint8_t *) input_buffer)[index], (uint16_t *) &(output_buffer[index]), volume, (PDMFilter_InitStruct *) &_PDM2PCM_filter[index]); #endif #ifdef PDM2PCM_AUDIO_DEBUG _pdm2pcm_audio_signal = 0; #endif } break; case 128: for (uint32_t index = 0; index < _channels; index++) { #ifdef PDM2PCM_AUDIO_DEBUG _pdm2pcm_audio_signal = 1; #endif #ifdef USE_OPEN_PDM2PCM_LIBRARY Open_PDM_Filter(&((uint8_t *) input_buffer)[index], (uint16_t *) &(output_buffer[index]), volume, (TPDMFilter_InitStruct *) &_PDM2PCM_filter[index]); index++; #else PDM_Filter_128_LSB(&((uint8_t *) input_buffer)[index], (uint16_t *) &(output_buffer[index]), volume, (PDMFilter_InitStruct *) &_PDM2PCM_filter[index]); #endif #ifdef PDM2PCM_AUDIO_DEBUG _pdm2pcm_audio_signal = 0; #endif } break; default: error("Decimation factor not supported: it must be either 64 or 128.\r\n"); } return COMPONENT_OK; } /** * @brief Scrambling audio data. * @param output_buffer Pointer to output PDM buffer data. * @param input_buffer Pointer to input PDM buffer data. * @param size Size of the buffers (thay has to be equally sized). * @retval COMPONENT_OK in case of success, COMPONENT_ERROR otherwise. */ status_t PDM2PCMAudio::scramble(uint16_t *output_buffer, uint16_t *input_buffer, uint32_t size) { for (uint32_t index = 0; index < size; index++) { output_buffer[index] = HTONS(input_buffer[index]); } return COMPONENT_OK; } /**s * @brief Demuxing audio data. * @param output_buffer Pointer to output PDM buffer data. * @param input_buffer Pointer to input PDM buffer data. * @param size Size of the buffers (thay has to be equally sized). * @retval COMPONENT_OK in case of success, COMPONENT_ERROR otherwise. */ status_t PDM2PCMAudio::demux(uint16_t *output_buffer, uint16_t *input_buffer, uint32_t size) { for (uint32_t index = 0; index < size; index++) { uint8_t a = ((uint8_t *) input_buffer)[index * 2]; uint8_t b = ((uint8_t *) input_buffer)[index * 2 + 1]; ((uint8_t *) (output_buffer))[index * 2] = _demux_filter[a & DEMUX_FILTER_MASK] | _demux_filter[b & DEMUX_FILTER_MASK] << 4; ((uint8_t *) (output_buffer))[index * 2 + 1] = _demux_filter[(a >> 1) & DEMUX_FILTER_MASK] | _demux_filter[(b >> 1) & DEMUX_FILTER_MASK] << 4; } return COMPONENT_OK; } /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/