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topology: Look up references for an object based on its index

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We can distinguish different use cases by the object index value, the default
value is 0, meaning applicable for all use cases, defined by macro "SND_TOLG_INDEX_ALL".
An element can only refer to other elements for "all" use cases or the same use
cases, i.e. it can only refer to elements with index value "SND_TOLG_INDEX_ALL"
or the same index value as itself.
The object list has been sorted in ascending order of index, so when we look up
a reference for an object, we traverse the object list it depends on, if we have
not found the reference until index of the object list is greater than index of
the object, we give up and return an error.

Signed-off-by: Fuwei Tang <fuweix.tang@intel.com>
Reviewed-by: Mengdong Lin <mengdong.lin@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Fuwei Tang 2017-04-13 14:52:46 +08:00 • committed by Takashi Iwai
parent af231ea1db
commit a3b4bd2c8c
7 changed files with 39 additions and 27 deletions
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18
src/topology/pcm.c
View file

@ -55,14 +55,14 @@ static void copy_stream_caps(const char *id,
/* find and copy the referenced stream caps */
static int tplg_build_stream_caps(snd_tplg_t *tplg,
const char *id, struct snd_soc_tplg_stream_caps *caps)
const char *id, int index, struct snd_soc_tplg_stream_caps *caps)
{
struct tplg_elem *ref_elem = NULL;
unsigned int i;
for (i = 0; i < 2; i++) {
ref_elem = tplg_elem_lookup(&tplg->pcm_caps_list,
caps[i].name, SND_TPLG_TYPE_STREAM_CAPS);
caps[i].name, SND_TPLG_TYPE_STREAM_CAPS, index);
if (ref_elem != NULL)
copy_stream_caps(id, &caps[i], ref_elem);
@ -78,7 +78,8 @@ static int build_pcm(snd_tplg_t *tplg, struct tplg_elem *elem)
struct list_head *base, *pos;
int err;
err = tplg_build_stream_caps(tplg, elem->id, elem->pcm->caps);
err = tplg_build_stream_caps(tplg, elem->id, elem->index,
elem->pcm->caps);
if (err < 0)
return err;
@ -137,7 +138,8 @@ static int tplg_build_dai(snd_tplg_t *tplg, struct tplg_elem *elem)
int err = 0;
/* get playback & capture stream caps */
err = tplg_build_stream_caps(tplg, elem->id, elem->dai->caps);
err = tplg_build_stream_caps(tplg, elem->id, elem->index,
elem->dai->caps);
if (err < 0)
return err;
@ -185,7 +187,7 @@ int tplg_build_dais(snd_tplg_t *tplg, unsigned int type)
}
static int tplg_build_stream_cfg(snd_tplg_t *tplg,
struct snd_soc_tplg_stream *stream, int num_streams)
struct snd_soc_tplg_stream *stream, int num_streams, int index)
{
struct snd_soc_tplg_stream *strm;
struct tplg_elem *ref_elem;
@ -194,7 +196,7 @@ static int tplg_build_stream_cfg(snd_tplg_t *tplg,
for (i = 0; i < num_streams; i++) {
strm = stream + i;
ref_elem = tplg_elem_lookup(&tplg->pcm_config_list,
strm->name, SND_TPLG_TYPE_STREAM_CONFIG);
strm->name, SND_TPLG_TYPE_STREAM_CONFIG, index);
if (ref_elem && ref_elem->stream_cfg)
*strm = *ref_elem->stream_cfg;
@ -211,7 +213,7 @@ static int build_link(snd_tplg_t *tplg, struct tplg_elem *elem)
int num_hw_configs = 0, err = 0;
err = tplg_build_stream_cfg(tplg, link->stream,
link->num_streams);
link->num_streams, elem->index);
if (err < 0)
return err;
@ -224,7 +226,7 @@ static int build_link(snd_tplg_t *tplg, struct tplg_elem *elem)
switch (ref->type) {
case SND_TPLG_TYPE_HW_CONFIG:
ref->elem = tplg_elem_lookup(&tplg->hw_cfg_list,
ref->id, SND_TPLG_TYPE_HW_CONFIG);
ref->id, SND_TPLG_TYPE_HW_CONFIG, elem->index);
if (!ref->elem) {
SNDERR("error: cannot find HW config '%s'"
" referenced by link '%s'\n",