This version only supports capture of PCM streams over a compressed
device and saves these as WAV files.
Signed-off-by: Charles Keepax <ckeepax(a)opensource.wolfsonmicro.com>
---
Changes since v2:
- Switched to using POSIX file IO to improve signal safety
Changes since v3:
- O_CREAT flag was missing from open, add this
Thanks,
Charles
Android.mk | 10 ++
crec.c | 418 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
makefile.linux | 20 ++-
3 files changed, 441 insertions(+), 7 deletions(-)
create mode 100644 crec.c
diff --git a/Android.mk b/Android.mk
index 104dfef..3cdd3d0 100644
--- a/Android.mk
+++ b/Android.mk
@@ -20,3 +20,13 @@ LOCAL_MODULE_TAGS := optional
include $(BUILD_EXECUTABLE)
+include $(CLEAR_VARS)
+
+LOCAL_C_INCLUDES:= $(LOCAL_PATH)/include
+LOCAL_SRC_FILES:= crec.c
+LOCAL_MODULE := crec
+LOCAL_SHARED_LIBRARIES:= libcutils libutils libtinycompress
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_EXECUTABLE)
+
diff --git a/crec.c b/crec.c
new file mode 100644
index 0000000..568e4b7
--- /dev/null
+++ b/crec.c
@@ -0,0 +1,418 @@
+/*
+ * BSD LICENSE
+ *
+ * crec command line recorder for compress audio record in alsa
+ * Copyright (c) 2011-2012, Intel Corporation
+ * Copyright (c) 2013-2014, Wolfson Microelectronic Ltd.
+ * All rights reserved.
+ *
+ * Author: Vinod Koul <vinod.koul(a)linux.intel.com>
+ * Author: Charles Keepax <ckeepax(a)opensource.wolfsonmicro.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 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.
+ * Neither the name of Intel Corporation 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.
+ *
+ * LGPL LICENSE
+ *
+ * crec command line recorder for compress audio record in alsa
+ * Copyright (c) 2011-2012, Intel Corporation
+ * Copyright (c) 2013-2014, Wolfson Microelectronic Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU Lesser General Public License,
+ * version 2.1, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to
+ * the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdint.h>
+#include <linux/types.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <getopt.h>
+#include <sys/time.h>
+#define __force
+#define __bitwise
+#define __user
+#include "sound/compress_params.h"
+#include "sound/compress_offload.h"
+#include "tinycompress/tinycompress.h"
+
+static int verbose;
+
+static const unsigned int DEFAULT_CHANNELS = 1;
+static const unsigned int DEFAULT_RATE = 44100;
+static const unsigned int DEFAULT_FORMAT = SNDRV_PCM_FORMAT_S16_LE;
+
+struct riff_chunk {
+ char desc[4];
+ uint32_t size;
+} __attribute__((__packed__));
+
+struct wave_header {
+ struct {
+ struct riff_chunk chunk;
+ char format[4];
+ } __attribute__((__packed__)) riff;
+
+ struct {
+ struct riff_chunk chunk;
+ uint16_t type;
+ uint16_t channels;
+ uint32_t rate;
+ uint32_t byterate;
+ uint16_t blockalign;
+ uint16_t samplebits;
+ } __attribute__((__packed__)) fmt;
+
+ struct {
+ struct riff_chunk chunk;
+ } __attribute__((__packed__)) data;
+} __attribute__((__packed__));
+
+const struct wave_header blank_wave_header = {
+ .riff = {
+ .chunk = {
+ .desc = "RIFF",
+ },
+ .format = "WAVE",
+ },
+ .fmt = {
+ .chunk = {
+ .desc = "fmt ", /* Note the space is important here */
+ .size = sizeof(blank_wave_header.fmt) -
+ sizeof(blank_wave_header.fmt.chunk),
+ },
+ .type = 0x01, /* PCM */
+ },
+ .data = {
+ .chunk = {
+ .desc = "data",
+ },
+ },
+};
+
+static void init_wave_header(struct wave_header *header, uint16_t channels,
+ uint32_t rate, uint16_t samplebits)
+{
+ memcpy(header, &blank_wave_header, sizeof(blank_wave_header));
+
+ header->fmt.channels = channels;
+ header->fmt.rate = rate;
+ header->fmt.byterate = channels * rate * (samplebits / 8);
+ header->fmt.blockalign = channels * (samplebits / 8);
+ header->fmt.samplebits = samplebits;
+}
+
+static void size_wave_header(struct wave_header *header, uint32_t size)
+{
+ header->riff.chunk.size = sizeof(*header) -
+ sizeof(header->riff.chunk) + size;
+ header->data.chunk.size = size;
+}
+
+static void usage(void)
+{
+ fprintf(stderr, "usage: crec [OPTIONS] filename\n"
+ "-c\tcard number\n"
+ "-d\tdevice node\n"
+ "-b\tbuffer size\n"
+ "-f\tfragments\n"
+ "-v\tverbose mode\n"
+ "-l\tlength of record in seconds\n"
+ "-h\tPrints this help list\n\n"
+ "-C\tSpecify the number of channels (default %u)\n"
+ "-R\tSpecify the sample rate (default %u)\n"
+ "-F\tSpecify the format: S16_LE, S32_LE (default S16_LE)\n\n"
+ "Example:\n"
+ "\tcrec -c 1 -d 2 test.wav\n"
+ "\tcrec -f 5 test.wav\n",
+ DEFAULT_CHANNELS, DEFAULT_RATE);
+
+ exit(EXIT_FAILURE);
+}
+
+static int print_time(struct compress *compress)
+{
+ unsigned int avail;
+ struct timespec tstamp;
+
+ if (compress_get_hpointer(compress, &avail, &tstamp) != 0) {
+ fprintf(stderr, "Error querying timestamp\n");
+ fprintf(stderr, "ERR: %s\n", compress_get_error(compress));
+ return -1;
+ } else {
+ printf("DSP recorded %jd.%jd\n",
+ (intmax_t)tstamp.tv_sec, (intmax_t)tstamp.tv_nsec*1000);
+ }
+ return 0;
+}
+
+void capture_samples(char *name, unsigned int card, unsigned int device,
+ unsigned long buffer_size, unsigned int frag,
+ unsigned int length, unsigned int rate,
+ unsigned int channels, unsigned int format)
+{
+ struct compr_config config;
+ struct snd_codec codec;
+ struct compress *compress;
+ struct wave_header header;
+ int file;
+ char *buffer;
+ size_t written;
+ int read, ret;
+ unsigned int size, total_read = 0;
+ unsigned int samplebits;
+
+ switch (format) {
+ case SNDRV_PCM_FORMAT_S32_LE:
+ samplebits = 32;
+ break;
+ default:
+ samplebits = 16;
+ break;
+ }
+
+ /* Convert length from seconds to bytes */
+ length = length * rate * (samplebits / 8) * channels;
+
+ if (verbose)
+ printf("%s: entry, reading %u bytes\n", __func__, length);
+
+ file = open(name, O_WRONLY | O_CREAT);
+ if (file == -1) {
+ fprintf(stderr, "Unable to open file '%s'\n", name);
+ exit(EXIT_FAILURE);
+ }
+
+ /* Write a header, will update with size once record is complete */
+ init_wave_header(&header, channels, rate, samplebits);
+ written = write(file, &header, sizeof(header));
+ if (written != sizeof(header)) {
+ fprintf(stderr, "Error writing output file header: %s\n",
+ strerror(errno));
+ goto file_exit;
+ }
+
+ memset(&codec, 0, sizeof(codec));
+ memset(&config, 0, sizeof(config));
+ codec.id = SND_AUDIOCODEC_PCM;
+ codec.ch_in = channels;
+ codec.ch_out = channels;
+ codec.sample_rate = rate;
+ if (!codec.sample_rate) {
+ fprintf(stderr, "invalid sample rate %d\n", rate);
+ goto file_exit;
+ }
+ codec.format = format;
+ if ((buffer_size != 0) && (frag != 0)) {
+ config.fragment_size = buffer_size/frag;
+ config.fragments = frag;
+ }
+ config.codec = &codec;
+
+ compress = compress_open(card, device, COMPRESS_OUT, &config);
+ if (!compress || !is_compress_ready(compress)) {
+ fprintf(stderr, "Unable to open Compress device %d:%d\n",
+ card, device);
+ fprintf(stderr, "ERR: %s\n", compress_get_error(compress));
+ goto file_exit;
+ };
+
+ if (verbose)
+ printf("%s: Opened compress device\n", __func__);
+
+ size = config.fragment_size;
+ buffer = malloc(size * config.fragments);
+ if (!buffer) {
+ fprintf(stderr, "Unable to allocate %d bytes\n", size);
+ goto comp_exit;
+ }
+
+ printf("Recording file %s On Card %u device %u, with buffer of %lu bytes\n",
+ name, card, device, buffer_size);
+ printf("Format %u Channels %u, %u Hz\n",
+ codec.id, codec.ch_out, rate);
+
+ compress_start(compress);
+
+ if (verbose)
+ printf("%s: Capturing audio NOW!!!\n", __func__);
+
+ do {
+ if (length && size > length - total_read)
+ size = length - total_read;
+
+ read = compress_read(compress, buffer, size);
+ if (read < 0) {
+ fprintf(stderr, "Error reading sample\n");
+ fprintf(stderr, "ERR: %s\n", compress_get_error(compress));
+ goto buf_exit;
+ }
+ if ((unsigned int)read != size) {
+ fprintf(stderr, "We read %d, DSP sent %d\n",
+ size, read);
+ }
+
+ if (read > 0) {
+ total_read += read;
+
+ written = write(file, buffer, read);
+ if (written != (size_t)read) {
+ fprintf(stderr, "Error writing output file: %s\n",
+ strerror(errno));
+ goto buf_exit;
+ }
+ if (verbose) {
+ print_time(compress);
+ printf("%s: read %d\n", __func__, read);
+ }
+ }
+ } while (!length || total_read < length);
+
+ ret = compress_stop(compress);
+ if (ret < 0) {
+ fprintf(stderr, "Error closing stream\n");
+ fprintf(stderr, "ERR: %s\n", compress_get_error(compress));
+ }
+
+ /* Update file header now we know file size */
+ size_wave_header(&header, total_read);
+ ret = lseek(file, 0, SEEK_SET);
+ if (ret < 0) {
+ fprintf(stderr, "Error seeking: %s\n", strerror(errno));
+ goto buf_exit;
+ }
+ written = write(file, &header, sizeof(header));
+ if (written != sizeof(header)) {
+ fprintf(stderr, "Error updating output file header: %s\n",
+ strerror(errno));
+ goto buf_exit;
+ }
+
+ if (verbose)
+ printf("%s: exit success\n", __func__);
+
+ free(buffer);
+ close(file);
+
+ compress_close(compress);
+
+ return;
+buf_exit:
+ free(buffer);
+comp_exit:
+ compress_close(compress);
+file_exit:
+ close(file);
+
+ if (verbose)
+ printf("%s: exit failure\n", __func__);
+
+ exit(EXIT_FAILURE);
+}
+
+int main(int argc, char **argv)
+{
+ char *file;
+ unsigned long buffer_size = 0;
+ int c;
+ unsigned int card = 0, device = 0, frag = 0, length = 0;
+ unsigned int rate = DEFAULT_RATE, channels = DEFAULT_CHANNELS;
+ unsigned int format = DEFAULT_FORMAT;
+
+ if (argc < 2)
+ usage();
+
+ verbose = 0;
+ while ((c = getopt(argc, argv, "hvl:R:C:F:b:f:c:d:")) != -1) {
+ switch (c) {
+ case 'h':
+ usage();
+ break;
+ case 'b':
+ buffer_size = strtol(optarg, NULL, 0);
+ break;
+ case 'f':
+ frag = strtol(optarg, NULL, 10);
+ break;
+ case 'c':
+ card = strtol(optarg, NULL, 10);
+ break;
+ case 'd':
+ device = strtol(optarg, NULL, 10);
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ case 'l':
+ length = strtol(optarg, NULL, 10);
+ break;
+ case 'R':
+ rate = strtol(optarg, NULL, 10);
+ break;
+ case 'C':
+ channels = strtol(optarg, NULL, 10);
+ break;
+ case 'F':
+ if (strcmp(optarg, "S16_LE") == 0) {
+ format = SNDRV_PCM_FORMAT_S16_LE;
+ } else if (strcmp(optarg, "S32_LE") == 0) {
+ format = SNDRV_PCM_FORMAT_S32_LE;
+ } else {
+ fprintf(stderr, "Unrecognised format: %s\n",
+ optarg);
+ usage();
+ }
+ break;
+ default:
+ exit(EXIT_FAILURE);
+ }
+ }
+ if (optind >= argc)
+ usage();
+
+ file = argv[optind];
+
+ capture_samples(file, card, device, buffer_size, frag, length,
+ rate, channels, format);
+
+ printf("Finish capturing... Close Normally\n");
+ exit(EXIT_SUCCESS);
+}
+
diff --git a/makefile.linux b/makefile.linux
index 677878d..81782d0 100644
--- a/makefile.linux
+++ b/makefile.linux
@@ -1,10 +1,13 @@
LIB = libtinycompress
-BIN = cplay
VER = 0.1
LIBSRC = compress.c
-SRC = cplay.c utils.c
+PLAYBIN = cplay
+RECBIN = crec
+PLAYSRC = cplay.c utils.c
+RECSRC = crec.c utils.c
LIBOBJ = ${LIBSRC:.c=.o}
-OBJ = ${SRC:.c=.o}
+PLAYOBJ = ${PLAYSRC:.c=.o}
+RECOBJ = ${RECSRC:.c=.o}
CC = gcc
CROSS_COMPILE =
@@ -13,23 +16,26 @@ CFLAGS += -std=c99 -Wall -Wextra -Wunused -DVERSION=\"${VER}\" -I./include
LDFLAGS += -L. -ltinycompress
LIBLDFLAGS = -lasound
-all: libtinycompress cplay
+all: libtinycompress cplay crec
$(LIB): ${LIBOBJ}
@echo " LD "$@
@${CROSS_COMPILE}${CC} ${CFLAGS} -shared -Wl,-soname,$@.so -o $@.so ${LIBOBJ} ${LIBLDFLAGS}
-$(BIN): ${OBJ} ${LIB}
+$(PLAYBIN): ${PLAYOBJ} ${LIB}
@echo " LD "$@
- @${CROSS_COMPILE}${CC} ${CFLAGS} -o $@ ${OBJ} ${LDFLAGS}
+ @${CROSS_COMPILE}${CC} ${CFLAGS} -o $@ ${PLAYOBJ} ${LDFLAGS}
+$(RECBIN): ${RECOBJ} ${LIB}
+ @echo " LD "$@
+ @${CROSS_COMPILE}${CC} ${CFLAGS} -o $@ ${RECOBJ} ${LDFLAGS}
%.o: %.c
@echo " CC "$<
@${CROSS_COMPILE}${CC} ${CFLAGS} -c -fPIC -o $@ $<
clean:
- @rm -rf ${BIN} ${OBJ} ${LIB}.so ${LIBOBJ}
+ @rm -rf ${BIN} ${PLAYOBJ} ${RECOBJ} ${LIB}.so ${LIBOBJ}
.PHONY: all clean
--
1.7.2.5
