[alsa-devel] [PATCH v2 11/13] topology: Add binary file builder.

[Liam Girdwood]

Build the binary output file from all the locally parsed objects and elements.

Signed-off-by: Liam Girdwood <liam.r.girdwood at linux.intel.com>
---
 src/topology/builder.c | 275 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 275 insertions(+)
 create mode 100644 src/topology/builder.c

diff --git a/src/topology/builder.c b/src/topology/builder.c
new file mode 100644
index 0000000..12adc81
--- /dev/null
+++ b/src/topology/builder.c
@@ -0,0 +1,275 @@
+/*
+  Copyright(c) 2014-2015 Intel Corporation
+  All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of version 2 of the GNU General Public License as
+  published by the Free Software Foundation.
+
+  This program is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  Authors: Mengdong Lin <mengdong.lin at intel.com>
+           Yao Jin <yao.jin at intel.com>
+           Liam Girdwood <liam.r.girdwood at linux.intel.com>
+*/
+
+#include "list.h"
+#include "tplg_local.h"
+
+/* verbose output detailing each object size and file position */
+static void verbose(snd_tplg_t *tplg, const char *fmt, ...)
+{
+	int offset;
+	va_list va;
+
+	if (!tplg->verbose)
+		return;
+
+	offset = lseek(tplg->out_fd, 0, SEEK_CUR);
+
+	va_start(va, fmt);
+	fprintf(stdout, "0x%6.6x/%6.6d -", offset, offset);
+	vfprintf(stdout, fmt, va);
+	va_end(va);
+}
+
+/* write out block header to output file */
+static int write_block_header(snd_tplg_t *tplg, unsigned int type,
+	unsigned int vendor_type, unsigned int version, unsigned int index,
+	size_t payload_size, int count)
+{
+	struct snd_soc_tplg_hdr hdr;
+	size_t bytes;
+	int offset = lseek(tplg->out_fd, 0, SEEK_CUR);
+
+	memset(&hdr, 0, sizeof(hdr));
+	hdr.magic = SND_SOC_TPLG_MAGIC;
+	hdr.abi = SND_SOC_TPLG_ABI_VERSION;
+	hdr.type = type;
+	hdr.vendor_type = vendor_type;
+	hdr.version = version;
+	hdr.payload_size = payload_size;
+	hdr.index = index;
+	hdr.size = sizeof(hdr);
+	hdr.count = count;
+
+	/* make sure file offset is aligned with the calculated HDR offset */
+	if ((unsigned int)offset != tplg->next_hdr_pos) {
+		fprintf(stderr, "error: New header is at offset 0x%x but file"
+			" offset 0x%x is %s by %d bytes\n",
+			tplg->next_hdr_pos, offset,
+			(unsigned int)offset > tplg->next_hdr_pos ? "ahead" : "behind",
+			abs(offset - tplg->next_hdr_pos));
+		exit(-EINVAL);
+	}
+
+	verbose(tplg, " header type %d size 0x%lx/%ld vendor %d "
+		"version %d\n", type, (long unsigned int)payload_size,
+		(long int)payload_size, vendor_type, version);
+
+	tplg->next_hdr_pos += hdr.payload_size + sizeof(hdr);
+
+	bytes = write(tplg->out_fd, &hdr, sizeof(hdr));
+	if (bytes != sizeof(hdr)) {
+		fprintf(stderr, "error: can't write section header %lu\n",
+			(long unsigned int)bytes);
+		return bytes;
+	}
+
+	return bytes;
+}
+
+static int write_elem_block(snd_tplg_t *tplg,
+	struct list_head *base, int size, int tplg_type, const char *obj_name)
+{
+	struct list_head *pos, *npos;
+	struct tplg_elem *elem;
+	int ret, wsize = 0, count = 0;
+
+	/* count number of elements */
+	list_for_each_safe(pos, npos, base)
+		count++;
+
+	/* write the header for this block */
+	ret = write_block_header(tplg, tplg_type, 0,
+		SND_SOC_TPLG_ABI_VERSION, 0, size, count);
+	if (ret < 0) {
+		fprintf(stderr, "error: failed to write %s block %d\n",
+			obj_name, ret);
+		return ret;
+	}
+
+	/* write each elem to block */
+	list_for_each_safe(pos, npos, base) {
+
+		elem = list_entry(pos, struct tplg_elem, list);
+
+		/* compound elems have already been copied to other elems */
+		if (elem->compound_elem)
+			continue;
+
+		if (elem->type != PARSER_TYPE_DAPM_GRAPH)
+			verbose(tplg, " %s '%s': write %d bytes\n",
+				obj_name, elem->id, elem->size);
+		else
+			verbose(tplg, " %s '%s': write %d bytes\n",
+				obj_name, elem->route->source, elem->size);
+
+		count = write(tplg->out_fd, elem->obj, elem->size);
+		if (count < 0) {
+			fprintf(stderr, "error: failed to write %s %d\n",
+				obj_name, ret);
+			return ret;
+		}
+
+		wsize += count;
+	}
+
+	/* make sure we have written the correct size */
+	if (wsize != size) {
+		fprintf(stderr, "error: size mismatch. Expected %d wrote %d\n",
+			size, wsize);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int calc_block_size(struct list_head *base)
+{
+	struct list_head *pos, *npos;
+	struct tplg_elem *elem;
+	int size = 0;
+
+	list_for_each_safe(pos, npos, base) {
+
+		elem = list_entry(pos, struct tplg_elem, list);
+
+		/* compound elems have already been copied to other elems */
+		if (elem->compound_elem)
+			continue;
+
+		size += elem->size;
+	}
+
+	return size;
+}
+
+static int write_block(snd_tplg_t *tplg, struct list_head *base,
+	int type)
+{
+	int size;
+
+	/* calculate the block size in bytes for all elems in this list */
+	size = calc_block_size(base);
+	if (size <= 0)
+		return size;
+
+	verbose(tplg, " block size for type %d is %d\n", type, size);
+
+	/* write each elem for this block */
+	switch (type) {
+	case PARSER_TYPE_MIXER:
+		return write_elem_block(tplg, base, size,
+			SND_SOC_TPLG_TYPE_MIXER, "mixer");
+	case PARSER_TYPE_BYTES:
+		return write_elem_block(tplg, base, size,
+			SND_SOC_TPLG_TYPE_BYTES, "bytes");
+	case PARSER_TYPE_ENUM:
+		return write_elem_block(tplg, base, size,
+			SND_SOC_TPLG_TYPE_ENUM, "enum");
+	case PARSER_TYPE_DAPM_GRAPH:
+		return write_elem_block(tplg, base, size,
+			SND_SOC_TPLG_TYPE_DAPM_GRAPH, "route");
+	case PARSER_TYPE_DAPM_WIDGET:
+		return write_elem_block(tplg, base, size,
+			SND_SOC_TPLG_TYPE_DAPM_WIDGET, "widget");
+	case PARSER_TYPE_PCM:
+		return write_elem_block(tplg, base, size,
+			SND_SOC_TPLG_TYPE_PCM, "pcm");
+	case PARSER_TYPE_BE:
+		return write_elem_block(tplg, base, size,
+			SND_SOC_TPLG_TYPE_DAI_LINK, "be");
+	case PARSER_TYPE_CC:
+		return write_elem_block(tplg, base, size,
+			SND_SOC_TPLG_TYPE_DAI_LINK, "cc");
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+int tplg_write_data(snd_tplg_t *tplg)
+{
+	int ret;
+
+	/* write mixer elems. */
+	ret = write_block(tplg, &tplg->mixer_list,
+		PARSER_TYPE_MIXER);
+	if (ret < 0) {
+		fprintf(stderr, "failed to write control elems %d\n", ret);
+		return ret;
+	}
+
+	/* write enum control elems. */
+	ret = write_block(tplg, &tplg->enum_list,
+		PARSER_TYPE_ENUM);
+	if (ret < 0) {
+		fprintf(stderr, "failed to write control elems %d\n", ret);
+		return ret;
+	}
+
+	/* write bytes extended control elems. */
+	ret = write_block(tplg, &tplg->bytes_ext_list,
+		PARSER_TYPE_BYTES);
+	if (ret < 0) {
+		fprintf(stderr, "failed to write control elems %d\n", ret);
+		return ret;
+	}
+
+	/* write widget elems */
+	ret = write_block(tplg, &tplg->widget_list,
+		PARSER_TYPE_DAPM_WIDGET);
+	if (ret < 0) {
+		fprintf(stderr, "failed to write widget elems %d\n", ret);
+		return ret;
+	}
+
+	/* write pcm elems */
+	ret = write_block(tplg, &tplg->pcm_list,
+		PARSER_TYPE_PCM);
+	if (ret < 0) {
+		fprintf(stderr, "failed to write pcm elems %d\n", ret);
+		return ret;
+	}
+
+	/* write be elems */
+	ret = write_block(tplg, &tplg->be_list,
+		PARSER_TYPE_BE);
+	if (ret < 0) {
+		fprintf(stderr, "failed to write be elems %d\n", ret);
+		return ret;
+	}
+
+	/* write cc elems */
+	ret = write_block(tplg, &tplg->cc_list,
+		PARSER_TYPE_CC);
+	if (ret < 0) {
+		fprintf(stderr, "failed to write cc elems %d\n", ret);
+		return ret;
+	}
+
+	/* write route elems */
+	ret = write_block(tplg, &tplg->route_list,
+		PARSER_TYPE_DAPM_GRAPH);
+	if (ret < 0) {
+		fprintf(stderr, "failed to write graph elems %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
-- 
2.1.4