From 7059e59cddc1c81321639875636e88895bc14309 Mon Sep 17 00:00:00 2001 From: José Bollo Date: Thu, 23 Jun 2016 20:34:57 +0200 Subject: vocabulary: moving from 'plugin' to 'binding' MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Ic9e118df2bede1fefbb591f8ae7887266b7324ca Signed-off-by: José Bollo --- plugins/radio/radio-rtlsdr.c | 427 ------------------------------------------- 1 file changed, 427 deletions(-) delete mode 100644 plugins/radio/radio-rtlsdr.c (limited to 'plugins/radio/radio-rtlsdr.c') diff --git a/plugins/radio/radio-rtlsdr.c b/plugins/radio/radio-rtlsdr.c deleted file mode 100644 index 7f76306e..00000000 --- a/plugins/radio/radio-rtlsdr.c +++ /dev/null @@ -1,427 +0,0 @@ -/* - * Copyright (C) 2015, 2016 "IoT.bzh" - * Author "Manuel Bachmann" - * - * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include -#include -#include -#include - -#include "radio-api.h" -#include "radio-rtlsdr.h" - -static void* _dongle_thread_fn (void *); -static void* _demod_thread_fn (void *); -static void* _output_thread_fn (void *); - -static unsigned int init_dev_count = 0; -static struct dev_ctx **dev_ctx = NULL; - -/* ------------- RADIO RTLSDR IMPLEMENTATION ---------------- */ - -/* --- PUBLIC FUNCTIONS --- */ - -/* Radio initialization should be done only when user start the radio and not at plugin initialization - Making this call too early would impose to restart the binder to detect a radio */ -unsigned char _radio_on (unsigned int num, radioCtxHandleT *ctx) { - - if (num >= _radio_dev_count()) - return 0; - - if (init_dev_count < _radio_dev_count()) { - init_dev_count = _radio_dev_count(); - dev_ctx = (dev_ctx_T**) realloc (dev_ctx, init_dev_count * sizeof(dev_ctx_T*)); - } - - dev_ctx[num] = (dev_ctx_T*) malloc (sizeof(dev_ctx_T)); - dev_ctx[num]->dev = NULL; - dev_ctx[num]->mode = ctx->mode; - dev_ctx[num]->freq = ctx->freq; - dev_ctx[num]->mute = ctx->mute; - dev_ctx[num]->should_run = 0; - dev_ctx[num]->dongle = NULL; - dev_ctx[num]->demod = NULL; - dev_ctx[num]->output = NULL; - _radio_dev_init (dev_ctx[num], num); - - return 1; -} - -void _radio_off (unsigned int num) { - - if (num >= _radio_dev_count()) - return; - - if (dev_ctx[num]) { - _radio_dev_free (dev_ctx[num]); - free (dev_ctx[num]); - } - - /* free(dev_ctx); */ -} - -void _radio_set_mode (unsigned int num, Mode mode) { - if (!dev_ctx || !dev_ctx[num]) - return; - - dev_ctx[num]->mode = mode; - _radio_apply_params (dev_ctx[num]); -} - -void _radio_set_freq (unsigned int num, double freq) { - if (!dev_ctx || !dev_ctx[num]) - return; - - dev_ctx[num]->freq = (float)freq; - _radio_apply_params (dev_ctx[num]); -} - -void _radio_set_mute (unsigned int num, unsigned char mute) { - if (!dev_ctx || !dev_ctx[num]) - return; - - dev_ctx[num]->mute = mute; - _radio_apply_params (dev_ctx[num]); -} - -void _radio_play (unsigned int num) { - if (!dev_ctx || !dev_ctx[num]) - return; - - _radio_start_threads (dev_ctx[num]); -} - -void _radio_stop (unsigned int num) { - if (!dev_ctx || !dev_ctx[num]) - return; - - _radio_stop_threads (dev_ctx[num]); -} - -unsigned int _radio_dev_count () { - return rtlsdr_get_device_count(); -} - -const char* _radio_dev_name (unsigned int num) { - return rtlsdr_get_device_name (num); -} - - -/* --- LOCAL HELPER FUNCTIONS --- */ - -unsigned char _radio_dev_init (dev_ctx_T *dev_ctx, unsigned int num) { - rtlsdr_dev_t *dev = dev_ctx->dev; - - if (rtlsdr_open (&dev, num) < 0) - return 0; - - rtlsdr_set_tuner_gain_mode (dev, 0); - - if (rtlsdr_reset_buffer (dev) < 0) - return 0; - - dev_ctx->dev = dev; - - _radio_apply_params (dev_ctx); - - return 1; -} - -unsigned char _radio_dev_free (dev_ctx_T *dev_ctx) { - rtlsdr_dev_t *dev = dev_ctx->dev; - - if (rtlsdr_close (dev) < 0) - return 0; - dev = NULL; - - dev_ctx->dev = dev; - - return 1; -} - -void _radio_apply_params (dev_ctx_T *dev_ctx) { - rtlsdr_dev_t *dev = dev_ctx->dev; - Mode mode = dev_ctx->mode; - float freq = dev_ctx->freq; - int rate; - - freq *= 1000000; - rate = ((1000000 / 200000) + 1) * 200000; - - if (mode == FM) - freq += 16000; - freq += rate / 4; - - rtlsdr_set_center_freq (dev, freq); - rtlsdr_set_sample_rate (dev, rate); - - dev_ctx->dev = dev; -} - -void _radio_start_threads (dev_ctx_T *dev_ctx) { - dev_ctx->dongle = (dongle_ctx*) malloc (sizeof(dongle_ctx)); - dev_ctx->demod = (demod_ctx*) malloc (sizeof(demod_ctx)); - dev_ctx->output = (output_ctx*) malloc (sizeof(output_ctx)); - - dongle_ctx *dongle = dev_ctx->dongle; - demod_ctx *demod = dev_ctx->demod; - output_ctx *output = dev_ctx->output; - - pthread_rwlock_init (&demod->lck, NULL); - pthread_cond_init (&demod->ok, NULL); - pthread_mutex_init (&demod->ok_m, NULL); - pthread_rwlock_init (&output->lck, NULL); - pthread_cond_init (&output->ok, NULL); - pthread_mutex_init (&output->ok_m, NULL); - - dev_ctx->should_run = 1; - - /* dongle thread */ - dongle->thr_finished = 0; - pthread_create (&dongle->thr, NULL, _dongle_thread_fn, (void*)dev_ctx); - - /* demod thread */ - demod->pre_r = demod->pre_j = 0; - demod->now_r = demod->now_j = 0; - demod->index = demod->pre_index = demod->now_index = 0; - demod->thr_finished = 0; - pthread_create (&demod->thr, NULL, _demod_thread_fn, (void*)dev_ctx); - - /* output thread */ - output->thr_finished = 0; - pthread_create (&output->thr, NULL, _output_thread_fn, (void*)dev_ctx); -} - -void _radio_stop_threads (dev_ctx_T *dev_ctx) { - rtlsdr_dev_t *dev = dev_ctx->dev; - dongle_ctx *dongle = dev_ctx->dongle; - demod_ctx *demod = dev_ctx->demod; - output_ctx *output = dev_ctx->output; - - if (!dongle || !demod || !output) - return; - - /* stop each "while" loop in threads */ - dev_ctx->should_run = 0; - - rtlsdr_cancel_async (dev); - pthread_signal (&demod->ok, &demod->ok_m); - pthread_signal (&output->ok, &output->ok_m); - - while (!dongle->thr_finished || - !demod->thr_finished || - !output->thr_finished) - usleep (100000); - - pthread_join (dongle->thr, NULL); - pthread_join (demod->thr, NULL); - pthread_join (output->thr, NULL); - pthread_rwlock_destroy (&demod->lck); - pthread_cond_destroy (&demod->ok); - pthread_mutex_destroy (&demod->ok_m); - pthread_rwlock_destroy (&output->lck); - pthread_cond_destroy (&output->ok); - pthread_mutex_destroy (&output->ok_m); - - free (dongle); dev_ctx->dongle = NULL; - free (demod); dev_ctx->demod = NULL; - free (output); dev_ctx->output = NULL; -} - - /* ---- LOCAL THREADED FUNCTIONS ---- */ - -static void _rtlsdr_callback (unsigned char *buf, uint32_t len, void *ctx) { - dev_ctx_T *dev_ctx = (dev_ctx_T *)ctx; - dongle_ctx *dongle = dev_ctx->dongle; - demod_ctx *demod = dev_ctx->demod; - unsigned char tmp; - int i; - - if (!dev_ctx->should_run) - return; - - /* rotate 90° */ - for (i = 0; i < (int)len; i += 8) { - tmp = 255 - buf[i+3]; - buf[i+3] = buf[i+2]; - buf[i+2] = tmp; - - buf[i+4] = 255 - buf[i+4]; - buf[i+5] = 255 - buf[i+5]; - - tmp = 255 - buf[i+6]; - buf[i+6] = buf[i+7]; - buf[i+7] = tmp; - } - - /* write data */ - for (i = 0; i < (int)len; i++) - dongle->buf[i] = (int16_t)buf[i] - 127; - - /* lock demod thread, write to it, unlock */ - pthread_rwlock_wrlock (&demod->lck); - memcpy (demod->buf, dongle->buf, 2 * len); - demod->buf_len = len; - pthread_rwlock_unlock (&demod->lck); - pthread_signal (&demod->ok, &demod->ok_m); -} - /**/ -static void* _dongle_thread_fn (void *ctx) { - dev_ctx_T *dev_ctx = (dev_ctx_T *)ctx; - dongle_ctx *dongle = dev_ctx->dongle; - - rtlsdr_read_async (dev_ctx->dev, _rtlsdr_callback, dev_ctx, 0, 0); - - dongle->thr_finished = 1; - return 0; -} - -static void _lowpass_demod (void *ctx) { - demod_ctx *demod = (demod_ctx *)ctx; - int i=0, i2=0; - - while (i < demod->buf_len) { - demod->now_r += demod->buf[i]; - demod->now_j += demod->buf[i+1]; - i += 2; - demod->index++; - if (demod->index < ((1000000 / 200000) + 1)) - continue; - demod->buf[i2] = demod->now_r; - demod->buf[i2+1] = demod->now_j; - demod->index = 0; - demod->now_r = demod->now_j = 0; - i2 += 2; - } - demod->buf_len = i2; -} - /**/ -static void _lowpassreal_demod (void *ctx) { - demod_ctx *demod = (demod_ctx *)ctx; - int i=0, i2=0; - int fast = 200000; - int slow = 48000; - - while (i < demod->res_len) { - demod->now_index += demod->res[i]; - i++; - demod->pre_index += slow; - if (demod->pre_index < fast) - continue; - demod->res[i2] = (int16_t)(demod->now_index / (fast/slow)); - demod->pre_index -= fast; - demod->now_index = 0; - i2 += 1; - } - demod->res_len = i2; -} - /**/ -static void _multiply (int ar, int aj, int br, int bj, int *cr, int *cj) { - *cr = ar*br - aj*bj; - *cj = aj*br + ar*bj; -} - /**/ -static int _polar_discriminant (int ar, int aj, int br, int bj) { - int cr, cj; - double angle; - _multiply (ar, aj, br, -bj, &cr, &cj); - angle = atan2 ((double)cj, (double)cr); - return (int)(angle / 3.14159 * (1<<14)); -} - /**/ -static void _fm_demod (void *ctx) { - demod_ctx *demod = (demod_ctx *)ctx; - int16_t *buf = demod->buf; - int buf_len = demod->buf_len; - int pcm, i; - - pcm = _polar_discriminant (buf[0], buf[1], demod->pre_r, demod->pre_j); - demod->res[0] = (int16_t)pcm; - - for (i = 2; i < (buf_len-1); i += 2) { - pcm = _polar_discriminant (buf[i], buf[i+1], buf[i-2], buf[i-1]); - demod->res[i/2] = (int16_t)pcm; - } - demod->pre_r = buf[buf_len - 2]; - demod->pre_j = buf[buf_len - 1]; - demod->res_len = buf_len/2; -} - /**/ -static void _am_demod (void *ctx) { - demod_ctx *demod = (demod_ctx *)ctx; - int16_t *buf = demod->buf; - int buf_len = demod->buf_len; - int pcm, i; - - for (i = 0; i < buf_len; i += 2) { - pcm = buf[i] * buf[i]; - pcm += buf[i+1] * buf[i+1]; - demod->res[i/2] = (int16_t)sqrt(pcm); - } - demod->res_len = buf_len/2; -} - /**/ -static void* _demod_thread_fn (void *ctx) { - dev_ctx_T *dev_ctx = (dev_ctx_T *)ctx; - demod_ctx *demod = dev_ctx->demod; - output_ctx *output = dev_ctx->output; - - while(dev_ctx->should_run) { - pthread_wait (&demod->ok, &demod->ok_m); - pthread_rwlock_wrlock (&demod->lck); - _lowpass_demod (demod); - if (dev_ctx->mode == FM) - _fm_demod (demod); - else - _am_demod (demod); - _lowpassreal_demod (demod); - pthread_rwlock_unlock (&demod->lck); - - /* lock demod thread, write to it, unlock */ - pthread_rwlock_wrlock (&output->lck); - memcpy (output->buf, demod->res, 2 * demod->res_len); - output->buf_len = demod->res_len; - pthread_rwlock_unlock (&output->lck); - pthread_signal (&output->ok, &output->ok_m); - } - - demod->thr_finished = 1; - return 0; -} - -static void* _output_thread_fn (void *ctx) { - dev_ctx_T *dev_ctx = (dev_ctx_T *)ctx; - output_ctx *output = dev_ctx->output; - FILE *file; - - file = fopen (AUDIO_BUFFER, "wb"); - - while (dev_ctx->should_run) { - pthread_wait (&output->ok, &output->ok_m); - pthread_rwlock_rdlock (&output->lck); - if (!dev_ctx->mute && file) { - fwrite (output->buf, 2, output->buf_len, file); - fflush (file); - fseek (file, 0, SEEK_SET); - } - pthread_rwlock_unlock (&output->lck); - } - if (file) fclose(file); - unlink (AUDIO_BUFFER); - - output->thr_finished = 1; - return 0; -} -- cgit 1.2.3-korg