core-format: Add pa_format_info_get_channels()

[pulseaudio] / src / pulsecore / core-format.c

diff --git a/src/pulsecore/core-format.c b/src/pulsecore/core-format.c
index 43ad4683d64382e4eec1a432943f794f7cc45a4f..c2457199cb89f3f8725d249a4e89e61bc3aa5d56 100644 (file)
--- a/src/pulsecore/core-format.c
+++ b/src/pulsecore/core-format.c
@@ -74,6 +74,27 @@ int pa_format_info_get_rate(pa_format_info *f, uint32_t *rate) {
     return 0;
 }
 
+int pa_format_info_get_channels(pa_format_info *f, uint8_t *channels) {
+    int r;
+    int channels_local;
+
+    pa_assert(f);
+    pa_assert(channels);
+
+    r = pa_format_info_get_prop_int(f, PA_PROP_FORMAT_CHANNELS, &channels_local);
+    if (r < 0)
+        return r;
+
+    if (!pa_channels_valid(channels_local)) {
+        pa_log_debug("Invalid channel count: %i", channels_local);
+        return -PA_ERR_INVALID;
+    }
+
+    *channels = channels_local;
+
+    return 0;
+}
+
 int pa_format_info_to_sample_spec_fake(pa_format_info *f, pa_sample_spec *ss, pa_channel_map *map) {
     int rate;