topology: add binary output from the builder

- snd_tplg_build_bin()
- snd_tplg_build_bin_file()

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

include/topology.h

@@ -793,6 +793,17 @@ void snd_tplg_free(snd_tplg_t *tplg);
 int snd_tplg_build_file(snd_tplg_t *tplg, const char *infile,
 			const char *outfile);
 
+/**
+ * \brief Parse and build topology text file into binary file.
+ * \param tplg Topology instance.
+ * \param infile Topology text input file to be parsed
+ * \param bin Binary topology output buffer (malloc).
+ * \param size Binary topology output buffer size in bytes.
+ * \return Zero on success, otherwise a negative error code
+ */
+int snd_tplg_build_bin_file(snd_tplg_t *tplg, const char *infile,
+			    void **bin, size_t *size);
+
 /**
  * \brief Enable verbose reporting of binary file output
  * \param tplg Topology Instance
@@ -1089,6 +1100,15 @@ int snd_tplg_add_object(snd_tplg_t *tplg, snd_tplg_obj_template_t *t);
  */
 int snd_tplg_build(snd_tplg_t *tplg, const char *outfile);
 
+/**
+ * \brief Build all registered topology data into memory.
+ * \param tplg Topology instance.
+ * \param bin Binary topology output buffer (malloc).
+ * \param size Binary topology output buffer size in bytes.
+ * \return Zero on success, otherwise a negative error code
+ */
+int snd_tplg_build_bin(snd_tplg_t *tplg, void **bin, size_t *size);
+
 /**
  * \brief Attach private data to topology manifest.
  * \param tplg Topology instance.

src/topology/parser.c

@@ -393,9 +393,7 @@ static int tplg_build_integ(snd_tplg_t *tplg)
 	return err;
 }
 
-int snd_tplg_build_file(snd_tplg_t *tplg,
+static int tplg_load(snd_tplg_t *tplg, const char *infile)
-			const char *infile,
-			const char *outfile)
 {
 	snd_config_t *cfg = NULL;
 	int err = 0;
@@ -414,10 +412,53 @@ int snd_tplg_build_file(snd_tplg_t *tplg,
 	}
 
 	snd_config_delete(cfg);
+	return 0;
+}
+
+static int tplg_build(snd_tplg_t *tplg)
+{
+	int err;
+
+	err = tplg_build_integ(tplg);
+	if (err < 0) {
+		SNDERR("error: failed to check topology integrity\n");
+		return err;
+	}
+
+	err = tplg_write_data(tplg);
+	if (err < 0) {
+		SNDERR("error: failed to write data %d\n", err);
+		return err;
+	}
+	return 0;
+}
+
+int snd_tplg_build_file(snd_tplg_t *tplg,
+			const char *infile,
+			const char *outfile)
+{
+	int err;
+
+	err = tplg_load(tplg, infile);
+	if (err < 0)
+		return err;
 
 	return snd_tplg_build(tplg, outfile);
 }
 
+int snd_tplg_build_bin_file(snd_tplg_t *tplg,
+			    const char *infile,
+			    void **bin, size_t *size)
+{
+	int err;
+
+	err = tplg_load(tplg, infile);
+	if (err < 0)
+		return err;
+
+	return snd_tplg_build_bin(tplg, bin, size);
+}
+
 int snd_tplg_add_object(snd_tplg_t *tplg, snd_tplg_obj_template_t *t)
 {
 	switch (t->type) {
@@ -450,17 +491,9 @@ int snd_tplg_build(snd_tplg_t *tplg, const char *outfile)
 	int fd, err;
 	ssize_t r;
 
-	err = tplg_build_integ(tplg);
+	err = tplg_build(tplg);
-	if (err < 0) {
+	if (err < 0)
-		SNDERR("error: failed to check topology integrity\n");
 		return err;
-	}
-
-	err = tplg_write_data(tplg);
-	if (err < 0) {
-		SNDERR("error: failed to write data %d\n", err);
-		return err;
-	}
 
 	fd = open(outfile, O_RDWR | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
 	if (fd < 0) {
@@ -481,6 +514,26 @@ int snd_tplg_build(snd_tplg_t *tplg, const char *outfile)
 	return 0;
 }
 
+int snd_tplg_build_bin(snd_tplg_t *tplg,
+		       void **bin, size_t *size)
+{
+	int err;
+
+	err = tplg_build(tplg);
+	if (err < 0)
+		return err;
+
+	err = tplg_build(tplg);
+	if (err < 0)
+		return err;
+
+	*bin = tplg->bin;
+	*size = tplg->bin_size;
+	tplg->bin = NULL;
+	tplg->bin_size = tplg->bin_pos = 0;
+	return 0;
+}
+
 int snd_tplg_set_manifest_data(snd_tplg_t *tplg, const void *data, int len)
 {
 	if (len <= 0)