tinycompress: Add application for accel operation

This 'caccel' applicaton is a demo to show how to
call the new introduced accel interface.

The kernel patch is:
ALSA: compress_offload: introduce accel operation mode

As there is conflict when using the API of alsa-lib,
add alsa_wrap file to separate the header files:
alsa/asoundlib.h
sound/asound.h

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>

src/utils/Makefile.am

@@ -1,11 +1,14 @@
-bin_PROGRAMS = cplay crecord
+bin_PROGRAMS = cplay crecord caccel
 
 cplay_SOURCES = cplay.c wave.c
 crecord_SOURCES = crecord.c wave.c
+caccel_SOURCES = caccel.c wave.c alsa_wrap.c
 
 cplay_CFLAGS = -I$(top_srcdir)/include
 crecord_CFLAGS = -I$(top_srcdir)/include
+caccel_CFLAGS = -I$(top_srcdir)/include
 
 
 cplay_LDADD = $(top_builddir)/src/lib/libtinycompress.la
 crecord_LDADD = $(top_builddir)/src/lib/libtinycompress.la
+caccel_LDADD = $(top_builddir)/src/lib/libtinycompress.la -lasound

src/utils/alsa_wrap.c

@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: (LGPL-2.1-only OR BSD-3-Clause)
+
+#include <alsa/asoundlib.h>
+
+snd_pcm_format_t alsa_snd_pcm_format_value(const char *name)
+{
+	return snd_pcm_format_value(name);
+}
+
+int alsa_snd_pcm_format_physical_width(snd_pcm_format_t format)
+{
+	return snd_pcm_format_physical_width(format);
+}
+
+int alsa_snd_pcm_format_width(snd_pcm_format_t format)
+{
+	return snd_pcm_format_width(format);
+}
+
+int alsa_snd_pcm_format_linear(snd_pcm_format_t format)
+{
+	return snd_pcm_format_linear(format);
+}
+
+int alsa_snd_pcm_format_signed(snd_pcm_format_t format)
+{
+	return snd_pcm_format_signed(format);
+}

src/utils/alsa_wrap.h

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: (LGPL-2.1-only OR BSD-3-Clause) */
+
+#ifndef __ALSA_WRAP_API_H
+#define __ALSA_WRAP_API_H
+
+snd_pcm_format_t alsa_snd_pcm_format_value(const char *name);
+int alsa_snd_pcm_format_physical_width(snd_pcm_format_t format);
+int alsa_snd_pcm_format_width(snd_pcm_format_t format);
+int alsa_snd_pcm_format_linear(snd_pcm_format_t format);
+int alsa_snd_pcm_format_signed(snd_pcm_format_t format);
+#endif
+

src/utils/caccel.c

@@ -0,0 +1,310 @@
+// SPDX-License-Identifier: (LGPL-2.1-only OR BSD-3-Clause)
+/*
+ * Copyright 2024 NXP
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "sound/compress_params.h"
+#include "sound/compress_offload.h"
+#include "tinycompress/tinywave.h"
+
+#include "alsa_wrap.h"
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#define DMA_BUF_SIZE  4096
+#define MAP_BUF_SIZE (512 * 1024)
+
+static int verbose;
+
+struct audio_info {
+	unsigned int card;
+	unsigned int device;
+	char *infile;
+	char *outfile;
+	unsigned int channels;
+	unsigned int in_rate;
+	unsigned short in_samplebits;
+	unsigned short in_blockalign;
+	unsigned int out_rate;
+	unsigned short out_samplebits;
+	unsigned short out_blockalign;
+	snd_pcm_format_t in_format;
+	snd_pcm_format_t out_format;
+	unsigned int in_dmabuf_size;
+};
+
+static void usage(void)
+{
+	fprintf(stderr, "usage: caccel [OPTIONS]\n"
+		"-c\tcard number\n"
+		"-d\tdevice node\n"
+		"-i\tinput wave file\n"
+		"-o\toutput wave file\n"
+		"-r\toutput rate\n"
+		"-f\toutput format\n"
+		"-b\tbuffer size\n"
+		"-v\tverbose mode\n"
+		"-h\tPrints this help list\n\n"
+		"Example:\n"
+		"\tcmemtomem -c 1 -d 2 -i input.wav -o output.wav\n"
+		"Valid codec: SRC\n");
+}
+
+static int parse_arguments(int argc, const char *argv[], struct audio_info *info)
+{
+	int c, option_index;
+	static const char short_options[] = "hvc:d:r:i:o:f:";
+	static const struct option long_options[] = {
+		{"help", 0, 0, 'h'},
+		{"verbose", 0, 0, 'v'},
+		{"card", 1, 0, 'c'},
+		{"device", 1, 0, 'd'},
+		{"inFile", 1, 0, 'i'},
+		{"outFile", 1, 0, 'o'},
+		{"outRate", 1, 0, 'r'},
+		{"outFormat", 1, 0, 'f'},
+		{0, 0, 0, 0}
+	};
+
+	if (argc < 3)
+		usage();
+
+	while ((c = getopt_long(argc, (char * const*)argv, short_options,
+				long_options, &option_index)) != -1) {
+		switch (c) {
+		case 'c':
+			info->card = strtol(optarg, NULL, 0);
+			break;
+		case 'd':
+			info->device = strtol(optarg, NULL, 0);
+			break;
+		case 'i':
+			info->infile = optarg;
+			break;
+		case 'o':
+			info->outfile = optarg;
+			break;
+		case 'r':
+			info->out_rate = strtol(optarg, NULL, 0);
+			break;
+		case 'f':
+			info->out_format = alsa_snd_pcm_format_value(optarg);
+			break;
+		case 'h':
+			usage();
+			exit(EXIT_FAILURE);
+		case 'v':
+			verbose = 1;
+			break;
+		default:
+			fprintf(stderr, "Unknown Command  -%c\n", c);
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	return 0;
+}
+
+int main(int argc, const char *argv[])
+{
+	struct wave_header in_header;
+	struct wave_header out_header;
+	struct audio_info info;
+	size_t read, written;
+	struct snd_compr_caps caps;
+	struct snd_compr_codec_caps codec_caps = {};
+	struct snd_compr_params params;
+	struct snd_compr_task task = {};
+	struct snd_compr_task_status status = {};
+	FILE *fd_dst = NULL;
+	FILE *fd_src = NULL;
+	void *bufin_start;
+	void *bufout_start;
+	char fn[256];
+	int fd_accel;
+	int length = 0;
+	int err = 0;
+
+	verbose = 0;
+	memset(&info, 0, sizeof(struct audio_info));
+
+	if (parse_arguments(argc, argv, &info) != 0)
+		return -1;
+
+	if (info.out_rate == 0) {
+		fprintf(stderr, "invalid output rate %d\n", info.out_rate);
+		return -1;
+	}
+
+	snprintf(fn, sizeof(fn), "/dev/snd/comprC%uD%u", info.card, info.device);
+
+	fd_accel = open(fn, O_RDWR);
+	if (fd_accel < 0) {
+		fprintf(stderr, "Unable to open device %d\n", fd_accel);
+		return -1;
+	}
+
+	fd_dst = fopen(info.outfile, "wb+");
+	if (fd_dst <= 0) {
+		fprintf(stderr, "output file not found\n");
+		goto err_dst_not_found;
+	}
+
+	fd_src = fopen(info.infile, "r");
+	if (fd_src <= 0) {
+		fprintf(stderr, "input file not found\n");
+		goto err_src_not_found;
+	}
+
+	read = fread(&in_header, 1, sizeof(in_header), fd_src);
+	if (read != sizeof(in_header)) {
+		fprintf(stderr, "Unable to read header\n");
+		goto end_header_read;
+	}
+
+	if (parse_wave_header(&in_header, &info.channels, &info.in_rate,
+			      (unsigned int *)&info.in_format) == -1) {
+		fprintf(stderr, "Unable to parse header\n");
+		goto end_header_read;
+	}
+
+	info.in_blockalign = info.channels * in_header.fmt.samplebits / 8;
+	info.in_dmabuf_size = (DMA_BUF_SIZE / info.in_blockalign) * info.in_blockalign;
+
+	if (info.out_format == 0)
+		info.out_format = SNDRV_PCM_FORMAT_S16_LE;
+
+	info.out_samplebits = alsa_snd_pcm_format_width(info.out_format);
+	init_wave_header(&out_header, info.channels, info.out_rate, info.out_samplebits);
+
+	written = fwrite(&out_header, 1, sizeof(out_header), fd_dst);
+	if (written != sizeof(out_header)) {
+		fprintf(stderr, "Error writing output file header: %s\n",
+			strerror(errno));
+		goto end_header_read;
+	}
+
+	err = ioctl(fd_accel, SNDRV_COMPRESS_GET_CAPS, &caps);
+	if (err < 0) {
+		fprintf(stderr, "Error getting caps %d\n", err);
+		goto end_header_read;
+	}
+
+	codec_caps.codec = SND_AUDIOCODEC_PCM;
+	err = ioctl(fd_accel, SNDRV_COMPRESS_GET_CODEC_CAPS, &codec_caps);
+	if (err < 0) {
+		fprintf(stderr, "Error getting codec caps %d\n", err);
+		goto end_header_read;
+	}
+
+	params.buffer.fragment_size = DMA_BUF_SIZE;
+	params.buffer.fragments = 1;
+	params.codec.id = SND_AUDIOCODEC_PCM;
+	params.codec.ch_in  = info.channels;
+	params.codec.ch_out = info.channels;
+	params.codec.format = info.in_format;
+	params.codec.sample_rate = info.in_rate;
+	params.codec.pcm_format = info.out_format;
+	params.codec.options.src_d.out_sample_rate = info.out_rate;
+
+	err = ioctl(fd_accel, SNDRV_COMPRESS_SET_PARAMS, &params);
+	if (err < 0) {
+		fprintf(stderr, "Error setting params %d\n", err);
+		goto end_header_read;
+	}
+
+	err = ioctl(fd_accel, SNDRV_COMPRESS_TASK_CREATE, &task);
+	if (err < 0) {
+		fprintf(stderr, "Error creating task %d\n", err);
+		goto end_header_read;
+	}
+
+	bufin_start = mmap(NULL, MAP_BUF_SIZE, PROT_READ | PROT_WRITE,
+			   MAP_SHARED, task.input_fd, 0);
+	if (bufin_start == MAP_FAILED) {
+		fprintf(stderr, "Error mapping input buffer\n");
+		goto end_mmap_in;
+	}
+	memset(bufin_start, 0, MAP_BUF_SIZE);
+
+	bufout_start = mmap(NULL, MAP_BUF_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED,
+			    task.output_fd, 0);
+	if (bufout_start == MAP_FAILED) {
+		fprintf(stderr, "Error mapping output buffer\n");
+		goto end_mmap_out;
+	}
+	memset(bufout_start, 0, MAP_BUF_SIZE);
+
+	if (verbose)
+		printf("conversion is started\n");
+
+	status.seqno = task.seqno;
+
+	do {
+
+		read = fread(bufin_start, 1, info.in_dmabuf_size, fd_src);
+		if (read <= 0)
+			break;
+
+		task.input_size = read;
+
+		if (ioctl(fd_accel, SNDRV_COMPRESS_TASK_START, &task) < 0) {
+			fprintf(stderr, "Error starting task\n");
+			goto end_process_err;
+		}
+
+		if (ioctl(fd_accel, SNDRV_COMPRESS_TASK_STOP, &task.seqno) < 0) {
+			fprintf(stderr, "Error stopping task\n");
+			goto end_process_err;
+		}
+
+		if (ioctl(fd_accel, SNDRV_COMPRESS_TASK_STATUS, &status) < 0) {
+			fprintf(stderr, "Error getting task status\n");
+			goto end_process_err;
+		}
+
+		written = fwrite(bufout_start, 1, status.output_size, fd_dst);
+		if (written != (size_t)status.output_size) {
+			fprintf(stderr, "Error writing output file: %s\n",
+				strerror(errno));
+			goto end_process_err;
+		}
+
+	} while (read > 0);
+
+	fseek(fd_dst, 0L, SEEK_END);
+	length = ftell(fd_dst);
+	size_wave_header(&out_header, length - sizeof(out_header));
+	fseek(fd_dst, 0L, SEEK_SET);
+	fwrite(&out_header, 1, sizeof(out_header), fd_dst);
+
+	if (verbose)
+		printf("Conversion is finished\n");
+
+end_process_err:
+	munmap(bufout_start, MAP_BUF_SIZE);
+end_mmap_out:
+	munmap(bufin_start, MAP_BUF_SIZE);
+end_mmap_in:
+	if (ioctl(fd_accel, SNDRV_COMPRESS_TASK_FREE, &task.seqno) < 0)
+		fprintf(stderr, "Error freeing task\n");
+end_header_read:
+	fclose(fd_src);
+err_src_not_found:
+	fclose(fd_dst);
+err_dst_not_found:
+	close(fd_accel);
+	return err;
+}