Il y avait des problèmes dans la libraire...
Dependencies: ST_FREQUENCY_DIVIDER ST_I2S USBDEVICE
Fork of X_NUCLEO_CCA02M1 by
Diff: BSP/PDM2PCMAudio.cpp
- Revision:
- 2:9f389fd8fb2e
- Child:
- 7:9d6a4a53e640
diff -r 245f83276546 -r 9f389fd8fb2e BSP/PDM2PCMAudio.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/BSP/PDM2PCMAudio.cpp Fri Apr 21 10:33:08 2017 +0200 @@ -0,0 +1,153 @@ +/** + ****************************************************************************** + * @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 < 1/*_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]); +#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 USE_OPEN_PDM2PCM_LIBRARY + Open_PDM_Filter(&((uint8_t *) input_buffer)[index], (uint16_t *) &(output_buffer[index]), volume, (TPDMFilter_InitStruct *) &_PDM2PCM_filter[index]); +#else + PDM_Filter_128_LSB(&((uint8_t *) input_buffer)[index], (uint16_t *) &(output_buffer[index]), volume, (PDMFilter_InitStruct *) &_PDM2PCM_filter[index]); +#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****/