This patch adds support to suspend output stream via Audio IPC.
>From HAL perspective stream can be either in standby or suspended -
the former is default one and can be auto-resumed on write while the
latter cannot be resumed only after explicitly going into standby
on audio code request.
---
android/hal-audio.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 70 insertions(+), 3 deletions(-)
diff --git a/android/hal-audio.c b/android/hal-audio.c
index 1de8830..93db6eb 100644
--- a/android/hal-audio.c
+++ b/android/hal-audio.c
@@ -450,6 +450,21 @@ static int ipc_resume_stream_cmd(uint8_t endpoint_id)
return result;
}
+static int ipc_suspend_stream_cmd(uint8_t endpoint_id)
+{
+ struct audio_cmd_suspend_stream cmd;
+ int result;
+
+ DBG("");
+
+ cmd.id = endpoint_id;
+
+ result = audio_ipc_cmd(AUDIO_SERVICE_ID, AUDIO_OP_SUSPEND_STREAM,
+ sizeof(cmd), &cmd, NULL, NULL, NULL);
+
+ return result;
+}
+
static int register_endpoints(void)
{
struct audio_endpoint *ep = &audio_endpoints[0];
@@ -548,8 +563,17 @@ static int out_set_format(struct audio_stream *stream, audio_format_t format)
static int out_standby(struct audio_stream *stream)
{
+ struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
+
DBG("");
- return -ENOSYS;
+
+ if (out->audio_state == AUDIO_A2DP_STATE_STARTED) {
+ if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
+ return -1;
+ out->audio_state = AUDIO_A2DP_STATE_STANDBY;
+ }
+
+ return 0;
}
static int out_dump(const struct audio_stream *stream, int fd)
@@ -560,8 +584,51 @@ static int out_dump(const struct audio_stream *stream, int fd)
static int out_set_parameters(struct audio_stream *stream, const char *kvpairs)
{
- DBG("");
- return -ENOSYS;
+ struct a2dp_stream_out *out = (struct a2dp_stream_out *) stream;
+ char *kvpair;
+ char *str;
+ char *saveptr;
+ bool enter_suspend = false;
+ bool exit_suspend = false;
+
+ DBG("%s", kvpairs);
+
+ str = strdup(kvpairs);
+ kvpair = strtok_r(str, ";", &saveptr);
+
+ for (; kvpair && *kvpair; kvpair = strtok_r(NULL, ";", &saveptr)) {
+ char *keyval;
+
+ keyval = strchr(kvpair, '=');
+ if (!keyval)
+ continue;
+
+ *keyval = '\0';
+ keyval++;
+
+ if (!strcmp(kvpair, "closing")) {
+ if (!strcmp(keyval, "true"))
+ out->audio_state = AUDIO_A2DP_STATE_NONE;
+ } else if (!strcmp(kvpair, "A2dpSuspended")) {
+ if (!strcmp(keyval, "true"))
+ enter_suspend = true;
+ else
+ exit_suspend = true;
+ }
+ }
+
+ free(str);
+
+ if (enter_suspend && out->audio_state == AUDIO_A2DP_STATE_STARTED) {
+ if (ipc_suspend_stream_cmd(out->ep->id) != AUDIO_STATUS_SUCCESS)
+ return -1;
+ out->audio_state = AUDIO_A2DP_STATE_SUSPENDED;
+ }
+
+ if (exit_suspend && out->audio_state == AUDIO_A2DP_STATE_SUSPENDED)
+ out->audio_state = AUDIO_A2DP_STATE_STANDBY;
+
+ return 0;
}
static char *out_get_parameters(const struct audio_stream *stream,
--
1.8.5.2
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