ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/services/audio/include/echo_reference.h b/marvell/services/audio/include/echo_reference.h
new file mode 100755
index 0000000..9e1d38b
--- /dev/null
+++ b/marvell/services/audio/include/echo_reference.h
@@ -0,0 +1,71 @@
+/*
+** Copyright 2011, The Android Open-Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+** http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#ifndef ANDROID_ECHO_REFERENCE_H
+#define ANDROID_ECHO_REFERENCE_H
+
+#include <stdint.h>
+#include <sys/time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Buffer descriptor used by read() and write() methods, including the time stamp and delay. */
+struct echo_reference_buffer {
+ void *raw; // pointer to audio frame
+ size_t frame_count; // number of frames in buffer
+ int32_t delay_ns; // delay for this buffer (see comment below)
+ struct timespec time_stamp; // time stamp for this buffer (see comment below)
+ // default ALSA gettimeofday() format
+};
+/**
+ * + as input:
+ * - delay_ns is the delay introduced by playback buffers
+ * - time_stamp is the time stamp corresponding to the delay calculation
+ * + as output:
+ * unused
+ * when used for EchoReference::read():
+ * + as input:
+ * - delay_ns is the delay introduced by capture buffers
+ * - time_stamp is the time stamp corresponding to the delay calculation
+ * + as output:
+ * - delay_ns is the delay between the returned frames and the capture time derived from
+ * delay and time stamp indicated as input. This delay is to be communicated to the AEC.
+ * - frame_count is updated with the actual number of frames returned
+ */
+
+struct echo_reference_itfe {
+ int (*read)(struct echo_reference_itfe *echo_reference, struct echo_reference_buffer *buffer);
+ int (*write)(struct echo_reference_itfe *echo_reference, struct echo_reference_buffer *buffer);
+};
+
+int create_echo_reference(audio_format_t rdFormat,
+ uint32_t rdChannelCount,
+ uint32_t rdSamplingRate,
+ audio_format_t wrFormat,
+ uint32_t wrChannelCount,
+ uint32_t wrSamplingRate,
+ uint32_t wrMaxFrameCount,
+ struct echo_reference_itfe **);
+
+void release_echo_reference(struct echo_reference_itfe *echo_reference);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // ANDROID_ECHO_REFERENCE_H