jerpelea commented on a change in pull request #2282:
URL: https://github.com/apache/incubator-nuttx/pull/2282#discussion_r526012405
##########
File path: drivers/audio/cxd56_src.c
##########
@@ -0,0 +1,607 @@
+/****************************************************************************
+ * drivers/audio/cxd56_src.c
+ *
+ * Copyright 2020 Sony Semiconductor Solutions Corporation
+ *
+ * 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 NuttX 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 OWNER 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <errno.h>
+#include <fcntl.h>
+#include <math.h>
+#include <queue.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/config.h>
+#include <nuttx/irq.h>
+#include <nuttx/kmalloc.h>
+#include <nuttx/mqueue.h>
+
+#include "cxd56.h"
+#include "cxd56_src.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* For debugging: dump pre/post SRC data to sdcard */
+
+/* #define DUMP_DATA */
+
+/* Note: 24 bit samples not currently supported by SRC */
+
+#define BUFFER_SAMPLES (CONFIG_CXD56_AUDIO_BUFFER_SIZE / 2)
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+enum cxd56_srcstate_e
+{
+ CXD56_SRC_OFF,
+ CXD56_SRC_RUNNING,
+ CXD56_SRC_STOPPING,
+ CXD56_SRC_STOPPED
+};
+
+struct cxd56_srcdata_s
+{
+ enum cxd56_srcstate_e state;
+
+ float float_in[BUFFER_SAMPLES];
+ float float_out[BUFFER_SAMPLES];
+ int float_in_offset;
+
+ SRC_DATA src_data;
+ SRC_STATE *src_state;
+
+ struct dq_queue_s *inq;
+ struct dq_queue_s *outq;
+
+ char mqname[32];
+ mqd_t mq;
+ sem_t pendsem;
+ pthread_t threadid;
+
+ uint8_t bytewidth;
+ uint8_t channels;
+
+ float buf_count;
+ float buf_increment;
+};
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static struct cxd56_srcdata_s g_src;
+
+#ifdef DUMP_DATA
+static char *dump_name_pre = "/mnt/sd0/dump/nx_player_dump_pre.pcm";
+static char *dump_name_post = "/mnt/sd0/dump/nx_player_dump_post.pcm";
+int dump_file_pre = -1;
+int dump_file_post = -1;
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+extern void src_short_to_float_array (const short *in, float *out, int len);
+extern void src_float_to_short_array (const float *in, short *out, int len);
+extern void src_int_to_float_array (const int *in, float *out, int len);
+extern void src_float_to_int_array (const float *in, int *out, int len);
+
+static struct ap_buffer_s *cxd56_src_get_apb()
+{
+ struct ap_buffer_s *src_apb;
+ irqstate_t flags;
+
+ flags = spin_lock_irqsave();
+
+ if (dq_count(g_src.inq) == 0)
+ {
+ size_t bufsize = sizeof(struct ap_buffer_s) +
+ CONFIG_CXD56_AUDIO_BUFFER_SIZE;
+
+ spin_unlock_irqrestore(flags);
+
+ src_apb = kmm_zalloc(bufsize);
+
+ flags = spin_lock_irqsave();
+
+ if (!src_apb)
+ {
+ auderr("ERROR: Couldn't allocate SRC APB (size %d)\n", bufsize);
+
+ goto errorout_with_lock;
+ }
+
+ src_apb->nmaxbytes = CONFIG_CXD56_AUDIO_BUFFER_SIZE;
+ src_apb->nbytes = 0;
+ src_apb->samp = (FAR uint8_t *)(&src_apb->samp + 1);
+ }
+ else
+ {
+ src_apb = (struct ap_buffer_s *) dq_get(g_src.inq);
+ }
+
+ src_apb->flags = 0;
+
+ spin_unlock_irqrestore(flags);
+
+ return src_apb;
+
+errorout_with_lock:
Review comment:
done
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