tplg_parser: Add support for parsing PCM headers

Parse the PCM headers and save the PCM info along with the host
component associated with the PCM.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>

tools/tplg_parser/CMakeLists.txt

@@ -21,6 +21,7 @@ target_sources(sof_tplg_parser PUBLIC
 	tokens.c
 	process.c
 	control.c
+	pcm.c
 	pga.c
 	mixer.c
 	pipeline.c

tools/tplg_parser/include/tplg_parser/topology.h

@@ -79,6 +79,7 @@ struct sof_ipc4_available_audio_format {
 
 struct tplg_comp_info {
 	char *name;
+	char *stream_name;
 	int id;
 	int type;
 	int pipeline_id;
@@ -93,6 +94,14 @@ struct tplg_route_info {
 	struct list_item item; /* item in a list */
 };
 
+struct tplg_pcm_info {
+	char *name;
+	int id;
+	struct tplg_comp_info *playback_host;
+	struct tplg_comp_info *capture_host;
+	struct list_item item; /* item in a list */
+};
+
 /*
  * Per topology data.
  *
@@ -164,6 +173,11 @@ struct tplg_context {
 	w = (struct snd_soc_tplg_dapm_graph_elem *)(ctx->tplg_base + ctx->tplg_offset); \
 	ctx->tplg_offset += sizeof(*w); w; })
 
+#define tplg_get_pcm(ctx)                                                       \
+	({struct snd_soc_tplg_pcm *pcm;                         \
+	pcm = (struct snd_soc_tplg_pcm *)(ctx->tplg_base + ctx->tplg_offset); \
+	ctx->tplg_offset += sizeof(*pcm) + pcm->priv.size; pcm; })
+
 static inline int tplg_valid_widget(struct snd_soc_tplg_dapm_widget *widget)
 {
 	if (widget->size == sizeof(struct snd_soc_tplg_dapm_widget))
@@ -261,4 +275,7 @@ int sof_parse_token_sets(void *object, const struct sof_topology_token *tokens,
 int tplg_parse_widget_audio_formats(struct tplg_context *ctx);
 int tplg_parse_graph(struct tplg_context *ctx, struct list_item *widget_list,
 		     struct list_item *route_list);
+int tplg_parse_pcm(struct tplg_context *ctx, struct list_item *widget_list,
+		   struct list_item *pcm_list);
+
 #endif

tools/tplg_parser/pcm.c

@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: BSD-3-Clause
+//
+// Copyright(c) 2023 Intel Corporation. All rights reserved.
+//
+// Author: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
+
+/* FE DAI or PCM parser */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <errno.h>
+#include <string.h>
+#include <ipc/topology.h>
+#include <sof/list.h>
+#include <sof/ipc/topology.h>
+#include <kernel/header.h>
+#include <tplg_parser/topology.h>
+
+/* parse and save the PCM information */
+int tplg_parse_pcm(struct tplg_context *ctx, struct list_item *widget_list,
+		   struct list_item *pcm_list)
+{
+	struct tplg_pcm_info *pcm_info;
+	struct snd_soc_tplg_pcm *pcm;
+	struct list_item *item;
+
+	pcm_info = calloc(sizeof(struct tplg_pcm_info), 1);
+	if (!pcm_info)
+		return -ENOMEM;
+
+	pcm = tplg_get_pcm(ctx);
+
+	pcm_info->name = strdup(pcm->pcm_name);
+	if (!pcm_info->name) {
+		free(pcm_info);
+		return -ENOMEM;
+	}
+
+	pcm_info->id = pcm->pcm_id;
+
+	/* look up from the widget list and populate the PCM info */
+	list_for_item(item, widget_list) {
+		struct tplg_comp_info *comp_info = container_of(item, struct tplg_comp_info, item);
+
+		if (!strcmp(pcm->caps[0].name, comp_info->stream_name) &&
+		    (comp_info->type == SND_SOC_TPLG_DAPM_AIF_IN ||
+		     comp_info->type == SND_SOC_TPLG_DAPM_AIF_OUT)) {
+			pcm_info->playback_host = comp_info;
+			fprintf(stdout, "PCM: '%s' ID: %d Host name: %s\n", pcm_info->name,
+				pcm_info->id, comp_info->name);
+		}
+		if (!strcmp(pcm->caps[1].name, comp_info->stream_name) &&
+		    (comp_info->type == SND_SOC_TPLG_DAPM_AIF_IN ||
+		     comp_info->type == SND_SOC_TPLG_DAPM_AIF_OUT)) {
+			pcm_info->capture_host = comp_info;
+			fprintf(stdout, "PCM: '%s' ID: %d Host name: %s\n", pcm_info->name,
+				pcm_info->id, comp_info->name);
+		}
+	}
+
+	list_item_append(&pcm_info->item, pcm_list);
+
+	return 0;
+}