kopia lustrzana https://github.com/OpenRTX/OpenRTX
Driver for file-based audio input device
Silvano Seva
rodzic
65d2fdb0e3
commit
8040a012b4
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@ -285,6 +285,7 @@ linux_platform_src = ['platform/targets/linux/emulator/emulator.c',
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'platform/mcu/x86_64/drivers/rng.cpp',
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'platform/drivers/baseband/radio_linux.cpp',
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'platform/drivers/audio/audio_linux.c',
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'platform/drivers/audio/file_source.c',
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'platform/targets/linux/platform.c',
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'platform/drivers/CPS/cps_io_libc.c']
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@ -0,0 +1,120 @@
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/***************************************************************************
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* Copyright (C) 2023 by Federico Amedeo Izzo IU2NUO, *
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* Niccolò Izzo IU2KIN *
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* Frederik Saraci IU2NRO *
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* Silvano Seva IU2KWO *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#include <stdlib.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include "file_source.h"
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static int fileSource_start(const uint8_t instance, const void *config, struct streamCtx *ctx)
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{
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(void) instance;
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if(ctx == NULL)
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return -EINVAL;
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if(ctx->running != 0)
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return -EBUSY;
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ctx->running = 1;
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FILE *fp = fopen(config, "rb");
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if(fp == NULL)
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{
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ctx->running = 0;
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return -EINVAL;
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}
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ctx->priv = fp;
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return 0;
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}
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static int fileSource_data(struct streamCtx *ctx, stream_sample_t **buf)
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{
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if(ctx->running == 0)
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return -1;
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FILE *fp = (FILE *) ctx->priv;
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stream_sample_t *dest = *buf;
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size_t size = ctx->bufSize;
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size_t i;
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if(ctx->bufMode == BUF_CIRC_DOUBLE)
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size /= 2;
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// Read data from the file, rollover when end is reached
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while (i < size)
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{
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size_t n = fread(dest + i, sizeof(stream_sample_t), size - i, fp);
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if (n < (size - i))
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fseek(fp, 0, SEEK_SET);
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i += n;
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}
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return size;
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}
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static int fileSource_sync(struct streamCtx *ctx, uint8_t dirty)
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{
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(void) dirty;
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size_t size = ctx->bufSize;
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if(ctx->bufMode == BUF_CIRC_DOUBLE)
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size /= 2;
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// Simulate the time needed to get a new chunck of data from an equivalent
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// hardware peripheral.
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uint32_t waitTime = (1000000 * size) / ctx->sampleRate;
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usleep(waitTime);
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return 0;
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}
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static void fileSource_stop(struct streamCtx *ctx)
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{
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if(ctx->running == 0)
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return;
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FILE *fp = (FILE *) ctx->priv;
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fclose(fp);
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}
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static void fileSource_halt(struct streamCtx *ctx)
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{
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if(ctx->running == 0)
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return;
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FILE *fp = (FILE *) ctx->priv;
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fclose(fp);
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}
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#pragma GCC diagnostic ignored "-Wpedantic"
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const struct audioDriver file_source_audio_driver =
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{
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.start = fileSource_start,
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.data = fileSource_data,
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.sync = fileSource_sync,
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.stop = fileSource_stop,
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.terminate = fileSource_halt
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};
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#pragma GCC diagnostic pop
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@ -0,0 +1,43 @@
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/***************************************************************************
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* Copyright (C) 2023 by Federico Amedeo Izzo IU2NUO, *
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* Niccolò Izzo IU2KIN *
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* Frederik Saraci IU2NRO *
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* Silvano Seva IU2KWO *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#ifndef FILE_SOURCE_H
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#define FILE_SOURCE_H
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#include <interfaces/audio.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Driver providing an audio input stream from a file. File format should be
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* raw, 16 bit, little endian. The configuration parameter is the file name with
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* the full path.
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*/
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extern const struct audioDriver file_source_audio_driver;
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#ifdef __cplusplus
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}
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#endif
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#endif /* STM32_DAC_H */
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