module: cadence / ipc4: Support for EOS handling and notification to host

When the pipeline has the expect_eos flag set and the cadence module
produces 0 bytes during process is an indication that the EOS has been
completed and the module drained all data from input to output.

Send a notification about this to host and set EOS state on downstream
module instances.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>

Author: ujfalusi

src/audio/module_adapter/module/cadence.c

@@ -250,6 +250,9 @@ int cadence_codec_init_process(struct processing_module *mod)
 	struct cadence_codec_data *cd = codec->private;
 	struct comp_dev *dev = mod->dev;
 
+	codec->mpd.eos_reached = false;
+	codec->mpd.eos_notification_sent = false;
+
 	API_CALL(cd, XA_API_CMD_SET_INPUT_BYTES, 0, &codec->mpd.avail, ret);
 	if (ret != LIB_NO_ERROR) {
 		comp_err(dev, "error %x: failed to set size of input data",
@@ -475,6 +478,13 @@ int cadence_codec_process_data(struct processing_module *mod)
 	struct comp_dev *dev = mod->dev;
 	int ret;
 
+	if (codec->mpd.eos_reached) {
+		codec->mpd.produced = 0;
+		codec->mpd.consumed = 0;
+
+		return 0;
+	}
+
 	API_CALL(cd, XA_API_CMD_SET_INPUT_BYTES, 0, &codec->mpd.avail, ret);
 	if (ret != LIB_NO_ERROR) {
 		comp_err(dev, "failed to set size of input data with error: %x:", ret);
@@ -503,5 +513,8 @@ int cadence_codec_process_data(struct processing_module *mod)
 		return ret;
 	}
 
+	if (!codec->mpd.produced && dev->pipeline->expect_eos)
+		codec->mpd.eos_reached = true;
+
 	return 0;
 }

src/audio/module_adapter/module/cadence_ipc4.c

@@ -8,8 +8,10 @@
 #include <sof/audio/cadence/mp3_dec/xa_mp3_dec_api.h>
 #include <sof/audio/cadence/mp3_enc/xa_mp3_enc_api.h>
 #include <sof/audio/cadence/aac_dec/xa_aac_dec_api.h>
+#include <sof/ipc/msg.h>
 #include <sof/schedule/ll_schedule_domain.h>
 #include <ipc/compress_params.h>
+#include <ipc4/notification.h>
 #include <rtos/init.h>
 
 SOF_DEFINE_REG_UUID(cadence_codec);
@@ -468,6 +470,36 @@ static int cadence_codec_process(struct processing_module *mod, struct sof_sourc
 		return ret;
 	}
 
+	if (codec->mpd.eos_reached && !codec->mpd.eos_notification_sent) {
+		struct ipc_msg msg_proto;
+		struct comp_ipc_config *ipc_config = &dev->ipc_config;
+		union ipc4_notification_header *primary =
+			(union ipc4_notification_header *)&msg_proto.header;
+		struct sof_ipc4_notify_module_data *msg_module_data;
+		struct ipc_msg *msg;
+
+		memset_s(&msg_proto, sizeof(msg_proto), 0, sizeof(msg_proto));
+		primary->r.notif_type = SOF_IPC4_MODULE_NOTIFICATION;
+		primary->r.type = SOF_IPC4_GLB_NOTIFICATION;
+		primary->r.rsp = SOF_IPC4_MESSAGE_DIR_MSG_REQUEST;
+		primary->r.msg_tgt = SOF_IPC4_MESSAGE_TARGET_FW_GEN_MSG;
+		msg = ipc_msg_w_ext_init(msg_proto.header, msg_proto.extension,
+					 sizeof(*msg_module_data));
+		if (msg) {
+			msg_module_data = (struct sof_ipc4_notify_module_data *)msg->tx_data;
+			msg_module_data->instance_id = IPC4_INST_ID(ipc_config->id);
+			msg_module_data->module_id = IPC4_MOD_ID(ipc_config->id);
+			msg_module_data->event_id = SOF_IPC4_NOTIFY_MODULE_EVENTID_COMPR_MAGIC_VAL;
+			msg_module_data->event_data_size = 0;
+
+			ipc_msg_send(msg, NULL, false);
+			codec->mpd.eos_notification_sent = true;
+		}
+
+		/* Set EOS for the sink as we are not going to produce more data */
+		audio_buffer_set_eos(sof_audio_buffer_from_sink(sinks[0]));
+	}
+
 	/* do not proceed if not enough free space left */
 	if (out_space < codec->mpd.produced) {
 		source_release_data(sources[0], 0);