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media-session: query stream format

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Query the stream format. We will use this later to decide what to link
to and how to convert.
This commit is contained in:
Wim Taymans 2018-10-04 16:41:00 +02:00
parent f81588f439
commit b2e84e85c6
1 changed files with 40 additions and 0 deletions
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40
src/examples/media-session.c
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@ -327,9 +327,39 @@ static void node_event_info(void *object, struct pw_node_info *info)
}
static void node_event_param(void *object,
uint32_t id, uint32_t index, uint32_t next,
const struct spa_pod *param)
{
struct node *n = object;
struct impl *impl = n->obj.impl;
uint32_t media_type, media_subtype;
struct spa_audio_info_raw info;
pw_log_debug(NAME" %p: param for node %d", impl, n->obj.id);
if (id != SPA_PARAM_EnumFormat)
return;
if (spa_format_parse(param, &media_type, &media_subtype) < 0)
return;
if (media_type != SPA_MEDIA_TYPE_audio ||
media_subtype != SPA_MEDIA_SUBTYPE_raw)
return;
spa_pod_fixate((struct spa_pod*)param);
if (spa_format_audio_raw_parse(param, &info) < 0)
return;
n->format = info;
}
static const struct pw_node_proxy_events node_events = {
PW_VERSION_NODE_PROXY_EVENTS,
.info = node_event_info,
.param = node_event_param,
};
static void remove_session(struct impl *impl, struct session *sess)
@ -432,6 +462,10 @@ handle_node(struct impl *impl, uint32_t id, uint32_t parent_id,
node->direction = direction;
node->type = NODE_TYPE_STREAM;
pw_log_debug(NAME "%p: node %d is stream", impl, id);
pw_node_proxy_enum_params((struct pw_node_proxy*)p,
SPA_PARAM_EnumFormat,
0, -1, NULL);
}
else {
struct session *sess;
@ -746,6 +780,7 @@ static int rescan_node(struct impl *impl, struct node *node)
struct pw_node_info *info;
struct node *peer;
enum pw_direction direction;
struct spa_audio_info_raw audio_info;
if (node->type == NODE_TYPE_DSP || node->type == NODE_TYPE_DEVICE)
return 0;
@ -858,6 +893,11 @@ static int rescan_node(struct impl *impl, struct node *node)
node->session = session;
spa_list_append(&session->node_list, &node->session_link);
audio_info = node->format;
audio_info.format = SPA_AUDIO_FORMAT_F32P;
audio_info.rate = session->node->format.rate;
audio_info.channels = SPA_MIN(session->node->format.channels, audio_info.channels);
link_nodes(peer, direction, node);
return 1;