tools: add generic resampler tool

Add a tool that can convert the sample rate of an input file and
write it to an output file. This tool can be used to test the
resampler.

spa/plugins/audioconvert/spa-resample.c

@@ -0,0 +1,274 @@
+/* Spa
+ *
+ * Copyright © 2020 Wim Taymans
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <time.h>
+#include <getopt.h>
+
+#include <spa/support/log-impl.h>
+#include <spa/debug/mem.h>
+
+#include <sndfile.h>
+
+SPA_LOG_IMPL(logger);
+
+#include "resample.h"
+#include "resample-native.h"
+
+#define DEFAULT_QUALITY	RESAMPLE_DEFAULT_QUALITY
+
+#define MAX_SAMPLES	1024
+
+struct data {
+	bool verbose;
+	int rate;
+	int format;
+	int quality;
+
+	const char *iname;
+	SF_INFO iinfo;
+	SNDFILE *ifile;
+
+	const char *oname;
+	SF_INFO oinfo;
+	SNDFILE *ofile;
+};
+
+#define STR_FMTS "(s8|s16|s32|f32|f64)"
+
+#define OPTIONS		"hvr:f:q:"
+static const struct option long_options[] = {
+	{"help",	no_argument,		NULL, 'h'},
+	{"verbose",	no_argument,		NULL, 'v'},
+
+	{"rate",	required_argument,	NULL, 'r' },
+	{"format",	required_argument,	NULL, 'f' },
+	{"quality",	required_argument,	NULL, 'q' },
+
+        {NULL, 0, NULL, 0 }
+};
+
+static void show_usage(const char *name, bool is_error)
+{
+	FILE *fp;
+
+	fp = is_error ? stderr : stdout;
+
+	fprintf(fp, "%s [options] <infile> <outfile>\n", name);
+	fprintf(fp,
+		"  -h, --help                            Show this help\n"
+		"  -v  --verbose                         Be verbose\n"
+		"\n");
+	fprintf(fp,
+		"  -r  --rate                            Output sample rate (default as input)\n"
+		"  -f  --format                          Output sample format %s (default as input)\n"
+		"  -q  --quality                         Resampler quality (default %u)\n"
+		"\n",
+		STR_FMTS, DEFAULT_QUALITY);
+}
+
+static inline int
+sf_str_to_fmt(const char *str)
+{
+	if (!str)
+		return -1;
+	if (!strcmp(str, "s8"))
+		return SF_FORMAT_PCM_S8;
+	if (!strcmp(str, "s16"))
+		return SF_FORMAT_PCM_16;
+	if (!strcmp(str, "s24"))
+		return SF_FORMAT_PCM_24;
+	if (!strcmp(str, "s32"))
+		return SF_FORMAT_PCM_32;
+	if (!strcmp(str, "f32"))
+		return SF_FORMAT_FLOAT;
+	if (!strcmp(str, "f64"))
+		return SF_FORMAT_DOUBLE;
+	return -1;
+}
+
+static int open_files(struct data *d)
+{
+	d->ifile = sf_open(d->iname, SFM_READ, &d->iinfo);
+        if (d->ifile == NULL) {
+		fprintf(stderr, "error: failed to open input file \"%s\": %s\n",
+				d->iname, sf_strerror(NULL));
+		return -EIO;
+	}
+
+	d->oinfo.channels = d->iinfo.channels;
+	d->oinfo.samplerate = d->rate > 0 ? d->rate : d->iinfo.samplerate;
+	d->oinfo.format = d->format > 0 ? d->format : d->iinfo.format;
+	d->oinfo.format |= SF_FORMAT_WAV;
+
+	d->ofile = sf_open(d->oname, SFM_WRITE, &d->oinfo);
+        if (d->ofile == NULL) {
+		fprintf(stderr, "error: failed to open output file \"%s\": %s\n",
+				d->oname, sf_strerror(NULL));
+		return -EIO;
+	}
+	return 0;
+}
+
+static int close_files(struct data *d)
+{
+	if (d->ifile)
+		sf_close(d->ifile);
+	if (d->ofile)
+		sf_close(d->ofile);
+	return 0;
+}
+
+static int do_conversion(struct data *d)
+{
+	struct resample r;
+	int channels = d->iinfo.channels;
+	float in[MAX_SAMPLES * channels];
+	float out[MAX_SAMPLES * channels];
+	float ibuf[MAX_SAMPLES * channels];
+	float obuf[MAX_SAMPLES * channels];
+	uint32_t in_len, out_len;
+        uint32_t pin_len, pout_len;
+	const void *src[channels];
+	void *dst[channels];
+	uint32_t i;
+	int j, k, queued;
+
+	spa_zero(r);
+	r.log = &logger.log;
+	r.channels = channels;
+	r.i_rate = d->iinfo.samplerate;
+	r.o_rate = d->oinfo.samplerate;
+	r.quality = d->quality > 0 ? d->quality : DEFAULT_QUALITY;
+	impl_native_init(&r);
+
+	for (j = 0; j < channels; j++)
+		src[j] = &in[MAX_SAMPLES * j];
+	for (j = 0; j < channels; j++)
+		dst[j] = &out[MAX_SAMPLES * j];
+
+	queued = 0;
+	while (true) {
+		pout_len = out_len = MAX_SAMPLES;
+                in_len = SPA_MIN(MAX_SAMPLES, (int)resample_in_len(&r, out_len)) - queued;
+
+	        pin_len = in_len = sf_readf_float(d->ifile, &ibuf[queued * channels], in_len);
+		if (pin_len == 0)
+			break;
+
+		in_len += queued;
+		pin_len = in_len;
+
+		for (k = 0, i = 0; i < pin_len; i++) {
+			for (j = 0; j < channels; j++) {
+				in[MAX_SAMPLES * j + i] = ibuf[k++];
+			}
+		}
+                resample_process(&r, src, &pin_len, dst, &pout_len);
+
+		queued = in_len - pin_len;
+		if (queued)
+			memmove(ibuf, &ibuf[pin_len * channels], queued * channels * sizeof(float));
+
+		for (k = 0, i = 0; i < pout_len; i++) {
+			for (j = 0; j < channels; j++) {
+				obuf[k++] = out[MAX_SAMPLES * j + i];
+			}
+		}
+		pout_len = sf_writef_float(d->ofile, obuf, pout_len);
+	}
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	char c;
+	int longopt_index = 0, ret;
+	struct data data;
+
+	spa_zero(data);
+
+	logger.log.level = SPA_LOG_LEVEL_DEBUG;
+
+	while ((c = getopt_long(argc, argv, OPTIONS, long_options, &longopt_index)) != -1) {
+		switch (c) {
+		case 'h':
+                        show_usage(argv[0], false);
+                        return EXIT_SUCCESS;
+		case 'v':
+			data.verbose = true;
+			break;
+		case 'r':
+			ret = atoi(optarg);
+			if (ret <= 0) {
+				fprintf(stderr, "error: bad rate %s\n", optarg);
+                                goto error_usage;
+			}
+			data.rate = ret;
+			break;
+		case 'f':
+			ret = sf_str_to_fmt(optarg);
+			if (ret < 0) {
+				fprintf(stderr, "error: bad format %s\n", optarg);
+                                goto error_usage;
+			}
+			data.format = ret;
+			break;
+		case 'q':
+			ret = atoi(optarg);
+			if (ret <= 0) {
+				fprintf(stderr, "error: bad quality %s\n", optarg);
+                                goto error_usage;
+			}
+			data.quality = ret;
+			break;
+                default:
+			fprintf(stderr, "error: unknown option '%c'\n", c);
+			goto error_usage;
+		}
+	}
+	if (optind + 1 >= argc) {
+                fprintf(stderr, "error: filename arguments missing (%d %d)\n", optind, argc);
+		goto error_usage;
+	}
+        data.iname = argv[optind++];
+        data.oname = argv[optind++];
+
+	if (open_files(&data) < 0)
+		return EXIT_FAILURE;
+
+	do_conversion(&data);
+
+	close_files(&data);
+
+	return 0;
+
+error_usage:
+        show_usage(argv[0], true);
+	return EXIT_FAILURE;
+}