[alsa-devel] [PATCH v3 04/13] topology: Add PCM parser.

29 Jul 2015

Parse PCM configurations and capabilities. These can then be used to define
the capabilities and config for FE DAI links, PCM devices and
codec <-> codec style links.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com
---
 src/topology/pcm.c | 639 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 639 insertions(+)
 create mode 100644 src/topology/pcm.c

diff --git a/src/topology/pcm.c b/src/topology/pcm.c
new file mode 100644
index 0000000..8f23a6f
--- /dev/null
+++ b/src/topology/pcm.c
@@ -0,0 +1,639 @@
+/*
+  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@intel.com
+           Yao Jin yao.jin@intel.com
+           Liam Girdwood liam.r.girdwood@linux.intel.com
+*/
+
+#include "list.h"
+#include "tplg_local.h"
+
+struct tplg_elem *lookup_pcm_dai_stream(struct list_head *base, const char* id)
+{
+	struct list_head *pos;
+	struct tplg_elem *elem;
+	struct snd_soc_tplg_pcm_dai *pcm_dai;
+
+	list_for_each(pos, base) {
+
+		elem = list_entry(pos, struct tplg_elem, list);
+		if (elem->type != OBJECT_TYPE_PCM)
+			return NULL;
+
+		pcm_dai = elem->pcm;
+
+		if (pcm_dai && (!strcmp(pcm_dai->capconf[0].caps.name, id)
+			|| !strcmp(pcm_dai->capconf[1].caps.name, id)))
+			return elem;
+	}
+
+	return NULL;
+}
+
+/* copy referenced caps to the pcm */
+static void copy_pcm_caps(const char *id, struct snd_soc_tplg_stream_caps *caps,
+	struct tplg_elem *ref_elem)
+{
+	struct snd_soc_tplg_stream_caps *ref_caps = ref_elem->stream_caps;
+
+	tplg_dbg("Copy pcm caps (%ld bytes) from '%s' to '%s' \n",
+		sizeof(*caps), ref_elem->id, id);
+
+	*caps =  *ref_caps;
+}
+
+/* copy referenced config to the pcm */
+static void copy_pcm_config(const char *id,
+	struct snd_soc_tplg_stream_config *cfg, struct tplg_elem *ref_elem)
+{
+	struct snd_soc_tplg_stream_config *ref_cfg = ref_elem->stream_cfg;
+
+	tplg_dbg("Copy pcm config (%ld bytes) from '%s' to '%s' \n",
+		sizeof(*cfg), ref_elem->id, id);
+
+	*cfg = *ref_cfg;
+}
+
+/* check referenced config and caps for a pcm */
+static int tplg_build_pcm_cfg_caps(snd_tplg_t *tplg, struct tplg_elem *elem)
+{
+	struct tplg_elem *ref_elem = NULL;
+	struct snd_soc_tplg_pcm_cfg_caps *capconf;
+	struct snd_soc_tplg_pcm_dai *pcm_dai;
+	unsigned int i, j;
+
+	switch (elem->type) {
+	case OBJECT_TYPE_PCM:
+		pcm_dai = elem->pcm;
+		break;
+	case OBJECT_TYPE_BE:
+		pcm_dai = elem->be;
+		break;
+	case OBJECT_TYPE_CC:
+		pcm_dai = elem->cc;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	for (i = 0; i < 2; i++) {
+		capconf = &pcm_dai->capconf[i];
+
+		ref_elem = tplg_elem_lookup(&tplg->pcm_caps_list,
+			capconf->caps.name, OBJECT_TYPE_STREAM_CAPS);
+
+		if (ref_elem != NULL)
+			copy_pcm_caps(elem->id, &capconf->caps, ref_elem);
+
+		for (j = 0; j < capconf->num_configs; j++) {
+			ref_elem = tplg_elem_lookup(&tplg->pcm_config_list,
+				capconf->configs[j].name,
+				OBJECT_TYPE_STREAM_CONFIG);
+
+			if (ref_elem != NULL)
+				copy_pcm_config(elem->id,
+					&capconf->configs[j],
+					ref_elem);
+		}
+	}
+
+	return 0;
+}
+
+int tplg_build_pcm_dai(snd_tplg_t *tplg, unsigned int type)
+{
+	struct list_head *base, *pos;
+	struct tplg_elem *elem;
+	int err = 0;
+
+	switch (type) {
+	case OBJECT_TYPE_PCM:
+		base = &tplg->pcm_list;
+		break;
+	case OBJECT_TYPE_BE:
+		base = &tplg->be_list;
+		break;
+	case OBJECT_TYPE_CC:
+		base = &tplg->cc_list;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	list_for_each(pos, base) {
+
+		elem = list_entry(pos, struct tplg_elem, list);
+		if (elem->type != type) {
+			SNDERR("error: invalid elem '%s'\n", elem->id);
+			return -EINVAL;
+		}
+
+		err = tplg_build_pcm_cfg_caps(tplg, elem);
+		if (err < 0)
+			return err;
+	}
+
+	return 0;
+}
+
+/* PCM stream configuration */
+static int tplg_parse_stream_cfg(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
+	snd_config_t *cfg, void *private)
+{
+	snd_config_iterator_t i, next;
+	snd_config_t *n;
+	struct snd_soc_tplg_stream_config *sc = private;
+	struct snd_soc_tplg_stream *stream;
+	const char *id, *val;
+	snd_pcm_format_t format;
+	int ret;
+
+	snd_config_get_id(cfg, &id);
+
+	if (strcmp(id, "playback") == 0)
+		stream = &sc->playback;
+	else if (strcmp(id, "capture") == 0)
+		stream = &sc->capture;
+	else
+		return -EINVAL;
+
+	tplg_dbg("\t%s:\n", id);
+
+	stream->size = sizeof(*stream);
+
+	snd_config_for_each(i, next, cfg) {
+
+		n = snd_config_iterator_entry(i);
+
+		if (snd_config_get_id(n, &id) < 0)
+			return -EINVAL;
+
+		if (snd_config_get_string(n, &val) < 0)
+			return -EINVAL;
+
+		if (strcmp(id, "format") == 0) {
+			format = snd_pcm_format_value(val);
+			if (format == SND_PCM_FORMAT_UNKNOWN) {
+				SNDERR("error: unsupported stream format %s\n",
+					val);
+				return -EINVAL;
+			}
+
+			stream->format = format;
+			tplg_dbg("\t\t%s: %s\n", id, val);
+			continue;
+		}
+
+		if (strcmp(id, "rate") == 0) {
+			stream->rate = atoi(val);
+			tplg_dbg("\t\t%s: %d\n", id, stream->rate);
+			continue;
+		}
+
+		if (strcmp(id, "channels") == 0) {
+			stream->channels = atoi(val);
+			tplg_dbg("\t\t%s: %d\n", id, stream->channels);
+			continue;
+		}
+
+		if (strcmp(id, "tdm_slot") == 0) {
+			stream->tdm_slot = strtol(val, NULL, 16);
+			tplg_dbg("\t\t%s: 0x%x\n", id, stream->tdm_slot);
+			continue;
+		}
+	}
+
+	return 0;
+}
+
+/* Parse pcm configuration */
+int tplg_parse_pcm_config(snd_tplg_t *tplg,
+	snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
+{
+	struct snd_soc_tplg_stream_config *sc;
+	struct tplg_elem *elem;
+	snd_config_iterator_t i, next;
+	snd_config_t *n;
+	const char *id;
+	int err;
+
+	elem = tplg_elem_new_common(tplg, cfg, OBJECT_TYPE_STREAM_CONFIG);
+	if (!elem)
+		return -ENOMEM;
+
+	sc = elem->stream_cfg;
+	sc->size = elem->size;
+
+	tplg_dbg(" PCM Config: %s\n", elem->id);
+
+	snd_config_for_each(i, next, cfg) {
+		n = snd_config_iterator_entry(i);
+		if (snd_config_get_id(n, &id) < 0)
+			continue;
+
+		/* skip comments */
+		if (strcmp(id, "comment") == 0)
+			continue;
+		if (id[0] == '#')
+			continue;
+
+		if (strcmp(id, "config") == 0) {
+			err = tplg_parse_compound(tplg, n,
+				tplg_parse_stream_cfg, sc);
+			if (err < 0)
+				return err;
+			continue;
+		}
+	}
+
+	return 0;
+}
+
+static int split_format(struct snd_soc_tplg_stream_caps *caps, char *str)
+{
+	char *s = NULL;
+	snd_pcm_format_t format;
+	int i = 0, ret;
+
+	s = strtok(str, ",");
+	while ((s != NULL) && (i < SND_SOC_TPLG_MAX_FORMATS)) {
+		format = snd_pcm_format_value(s);
+		if (format == SND_PCM_FORMAT_UNKNOWN) {
+			SNDERR("error: unsupported stream format %s\n", s);
+			return -EINVAL;
+		}
+
+		caps->formats[i] = format;
+		s = strtok(NULL, ", ");
+		i++;
+	}
+
+	return 0;
+}
+
+/* Parse pcm Capabilities */
+int tplg_parse_pcm_caps(snd_tplg_t *tplg,
+	snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
+{
+	struct snd_soc_tplg_stream_caps *sc;
+	struct tplg_elem *elem;
+	snd_config_iterator_t i, next;
+	snd_config_t *n;
+	const char *id, *val;
+	char *s;
+	int err;
+
+	elem = tplg_elem_new_common(tplg, cfg, OBJECT_TYPE_STREAM_CAPS);
+	if (!elem)
+		return -ENOMEM;
+
+	sc = elem->stream_caps;
+	sc->size = elem->size;
+	elem_copy_text(sc->name, elem->id, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
+
+	tplg_dbg(" PCM Capabilities: %s\n", elem->id);
+
+	snd_config_for_each(i, next, cfg) {
+		n = snd_config_iterator_entry(i);
+		if (snd_config_get_id(n, &id) < 0)
+			continue;
+
+		/* skip comments */
+		if (strcmp(id, "comment") == 0)
+			continue;
+		if (id[0] == '#')
+			continue;
+
+		if (snd_config_get_string(n, &val) < 0)
+			return -EINVAL;
+
+		if (strcmp(id, "formats") == 0) {
+			s = strdup(val);
+			if (s == NULL)
+				return -ENOMEM;
+
+			err = split_format(sc, s);
+			free(s);
+
+			if (err < 0)
+				return err;
+
+			tplg_dbg("\t\t%s: %s\n", id, val);
+			continue;
+		}
+
+		if (strcmp(id, "rate_min") == 0) {
+			sc->rate_min = atoi(val);
+			tplg_dbg("\t\t%s: %d\n", id, sc->rate_min);
+			continue;
+		}
+
+		if (strcmp(id, "rate_max") == 0) {
+			sc->rate_max = atoi(val);
+			tplg_dbg("\t\t%s: %d\n", id, sc->rate_max);
+			continue;
+		}
+
+		if (strcmp(id, "channels_min") == 0) {
+			sc->channels_min = atoi(val);
+			tplg_dbg("\t\t%s: %d\n", id, sc->channels_min);
+			continue;
+		}
+
+		if (strcmp(id, "channels_max") == 0) {
+			sc->channels_max = atoi(val);
+			tplg_dbg("\t\t%s: %d\n", id, sc->channels_max);
+			continue;
+		}
+	}
+
+	return 0;
+}
+
+static int tplg_parse_pcm_cfg(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
+	snd_config_t *cfg, void *private)
+{
+	struct snd_soc_tplg_pcm_cfg_caps *capconf = private;
+	struct snd_soc_tplg_stream_config *configs = capconf->configs;
+	unsigned int *num_configs = &capconf->num_configs;
+	const char *value;
+
+	if (*num_configs == SND_SOC_TPLG_STREAM_CONFIG_MAX)
+		return -EINVAL;
+
+	if (snd_config_get_string(cfg, &value) < 0)
+		return EINVAL;
+
+	elem_copy_text(configs[*num_configs].name, value,
+		SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
+
+	*num_configs += 1;
+
+	tplg_dbg("\t\t\t%s\n", value);
+
+	return 0;
+}
+
+/* Parse the cap and config of a pcm */
+int tplg_parse_pcm_cap_cfg(snd_tplg_t *tplg, snd_config_t *cfg,
+	void *private)
+{
+	snd_config_iterator_t i, next;
+	snd_config_t *n;
+	struct tplg_elem *elem = private;
+	struct snd_soc_tplg_pcm_dai *pcm_dai;
+	const char *id, *value;
+	int err, stream;
+
+	if (elem->type == OBJECT_TYPE_PCM)
+		pcm_dai = elem->pcm;
+	else if (elem->type == OBJECT_TYPE_BE)
+		pcm_dai = elem->be;
+	else if (elem->type == OBJECT_TYPE_CC)
+		pcm_dai = elem->cc;
+	else
+		return -EINVAL;
+
+	snd_config_get_id(cfg, &id);
+
+	tplg_dbg("\t%s:\n", id);
+
+	if (strcmp(id, "playback") == 0) {
+		stream = SND_SOC_TPLG_STREAM_PLAYBACK;
+		pcm_dai->playback = 1;
+	} else if (strcmp(id, "capture") == 0) {
+		stream = SND_SOC_TPLG_STREAM_CAPTURE;
+		pcm_dai->capture = 1;
+	} else
+		return -EINVAL;
+
+	snd_config_for_each(i, next, cfg) {
+
+		n = snd_config_iterator_entry(i);
+
+		/* get id */
+		if (snd_config_get_id(n, &id) < 0)
+			continue;
+
+		if (strcmp(id, "capabilities") == 0) {
+			if (snd_config_get_string(n, &value) < 0)
+				continue;
+
+			elem_copy_text(pcm_dai->capconf[stream].caps.name, value,
+				SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
+
+			tplg_dbg("\t\t%s\n\t\t\t%s\n", id, value);
+			continue;
+		}
+
+		if (strcmp(id, "configs") == 0) {
+			tplg_dbg("\t\tconfigs:\n");
+			err = tplg_parse_compound(tplg, n, tplg_parse_pcm_cfg,
+				&pcm_dai->capconf[stream]);
+			if (err < 0)
+				return err;
+			continue;
+		}
+	}
+
+	return 0;
+}
+
+/* Parse pcm */
+int tplg_parse_pcm(snd_tplg_t *tplg,
+	snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
+{
+	struct snd_soc_tplg_pcm_dai *pcm_dai;
+	struct tplg_elem *elem;
+	snd_config_iterator_t i, next;
+	snd_config_t *n;
+	const char *id, *val = NULL;
+	int err;
+
+	elem = tplg_elem_new_common(tplg, cfg, OBJECT_TYPE_PCM);
+	if (!elem)
+		return -ENOMEM;
+
+	pcm_dai = elem->pcm;
+	pcm_dai->size = elem->size;
+	elem_copy_text(pcm_dai->name, elem->id, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
+
+	tplg_dbg(" PCM: %s\n", elem->id);
+
+	snd_config_for_each(i, next, cfg) {
+
+		n = snd_config_iterator_entry(i);
+		if (snd_config_get_id(n, &id) < 0)
+			continue;
+
+		/* skip comments */
+		if (strcmp(id, "comment") == 0)
+			continue;
+		if (id[0] == '#')
+			continue;
+
+		if (strcmp(id, "index") == 0) {
+			if (snd_config_get_string(n, &val) < 0)
+				return -EINVAL;
+
+			elem->index = atoi(val);
+			tplg_dbg("\t%s: %d\n", id, elem->index);
+			continue;
+		}
+
+		if (strcmp(id, "id") == 0) {
+			if (snd_config_get_string(n, &val) < 0)
+				return -EINVAL;
+
+			pcm_dai->id = atoi(val);
+			tplg_dbg("\t%s: %d\n", id, pcm_dai->id);
+			continue;
+		}
+
+		if (strcmp(id, "pcm") == 0) {
+			err = tplg_parse_compound(tplg, n,
+				tplg_parse_pcm_cap_cfg, elem);
+			if (err < 0)
+				return err;
+			continue;
+		}
+	}
+
+	return 0;
+}
+
+/* Parse be */
+int tplg_parse_be(snd_tplg_t *tplg,
+	snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
+{
+	struct snd_soc_tplg_pcm_dai *pcm_dai;
+	struct tplg_elem *elem;
+	snd_config_iterator_t i, next;
+	snd_config_t *n;
+	const char *id, *val = NULL;
+	int err;
+
+	elem = tplg_elem_new_common(tplg, cfg, OBJECT_TYPE_BE);
+	if (!elem)
+		return -ENOMEM;
+
+	pcm_dai = elem->be;
+	pcm_dai->size = elem->size;
+	elem_copy_text(pcm_dai->name, elem->id, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
+
+	tplg_dbg(" BE: %s\n", elem->id);
+
+	snd_config_for_each(i, next, cfg) {
+
+		n = snd_config_iterator_entry(i);
+		if (snd_config_get_id(n, &id) < 0)
+			continue;
+
+		/* skip comments */
+		if (strcmp(id, "comment") == 0)
+			continue;
+		if (id[0] == '#')
+			continue;
+
+		if (strcmp(id, "index") == 0) {
+			if (snd_config_get_string(n, &val) < 0)
+				return -EINVAL;
+
+			elem->index = atoi(val);
+			tplg_dbg("\t%s: %d\n", id, elem->index);
+			continue;
+		}
+
+		if (strcmp(id, "id") == 0) {
+			if (snd_config_get_string(n, &val) < 0)
+				return -EINVAL;
+
+			pcm_dai->id = atoi(val);
+			tplg_dbg("\t%s: %d\n", id, pcm_dai->id);
+			continue;
+		}
+
+		if (strcmp(id, "be") == 0) {
+			err = tplg_parse_compound(tplg, n,
+				tplg_parse_pcm_cap_cfg, elem);
+			if (err < 0)
+				return err;
+			continue;
+		}
+	}
+
+	return 0;
+}
+
+/* Parse cc */
+int tplg_parse_cc(snd_tplg_t *tplg,
+	snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
+{
+	struct snd_soc_tplg_pcm_dai *pcm_dai;
+	struct tplg_elem *elem;
+	snd_config_iterator_t i, next;
+	snd_config_t *n;
+	const char *id, *val = NULL;
+	int err;
+
+	elem = tplg_elem_new_common(tplg, cfg, OBJECT_TYPE_CC);
+	if (!elem)
+		return -ENOMEM;
+
+	pcm_dai = elem->cc;
+	pcm_dai->size = elem->size;
+
+	tplg_dbg(" CC: %s\n", elem->id);
+
+	snd_config_for_each(i, next, cfg) {
+
+		n = snd_config_iterator_entry(i);
+		if (snd_config_get_id(n, &id) < 0)
+			continue;
+
+		/* skip comments */
+		if (strcmp(id, "comment") == 0)
+			continue;
+		if (id[0] == '#')
+			continue;
+
+		if (strcmp(id, "index") == 0) {
+			if (snd_config_get_string(n, &val) < 0)
+				return -EINVAL;
+
+			elem->index = atoi(val);
+			tplg_dbg("\t%s: %d\n", id, elem->index);
+			continue;
+		}
+
+		if (strcmp(id, "id") == 0) {
+			if (snd_config_get_string(n, &val) < 0)
+				return -EINVAL;
+
+			pcm_dai->id = atoi(val);
+			tplg_dbg("\t%s: %d\n", id, pcm_dai->id);
+			continue;
+		}
+
+		if (strcmp(id, "cc") == 0) {
+			err = tplg_parse_compound(tplg, n,
+				tplg_parse_pcm_cap_cfg, elem);
+			if (err < 0)
+				return err;
+			continue;
+		}
+	}
+
+	return 0;
+}
-- 
2.1.4


    