original

[gb-231r1-is01/GB_2.3_IS01.git] / system / media / opensles / libopensles / ISeek.c

diff --git a/system/media/opensles/libopensles/ISeek.c b/system/media/opensles/libopensles/ISeek.c
new file mode 100644 (file)
index 0000000..2195bba
--- /dev/null
+++ b/system/media/opensles/libopensles/ISeek.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+/* Seek implementation */
+
+#include "sles_allinclusive.h"
+
+
+static SLresult ISeek_SetPosition(SLSeekItf self, SLmillisecond pos, SLuint32 seekMode)
+{
+    SL_ENTER_INTERFACE
+
+    switch (seekMode) {
+    case SL_SEEKMODE_FAST:
+    case SL_SEEKMODE_ACCURATE:
+        {
+        // maximum position is a special value that indicates a seek is not pending
+        if (SL_TIME_UNKNOWN == pos) {
+            pos = SL_TIME_UNKNOWN - 1;
+        }
+        ISeek *this = (ISeek *) self;
+        interface_lock_exclusive(this);
+        this->mPos = pos;
+        // at this point the seek is merely pending, so do not yet update other fields
+        interface_unlock_exclusive_attributes(this, ATTR_POSITION);
+        result = SL_RESULT_SUCCESS;
+        }
+        break;
+    default:
+        result = SL_RESULT_PARAMETER_INVALID;
+        break;
+    }
+
+    SL_LEAVE_INTERFACE
+}
+
+
+static SLresult ISeek_SetLoop(SLSeekItf self, SLboolean loopEnable,
+    SLmillisecond startPos, SLmillisecond endPos)
+{
+    SL_ENTER_INTERFACE
+
+    if (!(startPos < endPos)) {
+        result = SL_RESULT_PARAMETER_INVALID;
+    } else {
+        ISeek *this = (ISeek *) self;
+        interface_lock_exclusive(this);
+#ifdef ANDROID
+        if ((startPos != 0) && (endPos != SL_TIME_UNKNOWN)) {
+            result = SL_RESULT_FEATURE_UNSUPPORTED;
+        } else {
+            this->mLoopEnabled = SL_BOOLEAN_FALSE != loopEnable; // normalize
+            // start and end positions already initialized to [0, end of stream]
+            /*this->mStartPos = 0;
+            this->mEndPos = (SLmillisecond) SL_TIME_UNKNOWN;*/
+            CAudioPlayer *ap = InterfaceToCAudioPlayer(this);
+            if (NULL != ap) {
+                android_audioPlayer_loop(ap, loopEnable);
+            }
+            result = SL_RESULT_SUCCESS;
+        }
+#else
+        this->mLoopEnabled = SL_BOOLEAN_FALSE != loopEnable; // normalize
+        this->mStartPos = startPos;
+        this->mEndPos = endPos;
+        result = SL_RESULT_SUCCESS;
+#endif
+        interface_unlock_exclusive(this);
+    }
+
+    SL_LEAVE_INTERFACE
+}
+
+
+static SLresult ISeek_GetLoop(SLSeekItf self, SLboolean *pLoopEnabled,
+    SLmillisecond *pStartPos, SLmillisecond *pEndPos)
+{
+    SL_ENTER_INTERFACE
+
+    if (NULL == pLoopEnabled || NULL == pStartPos || NULL == pEndPos) {
+        result = SL_RESULT_PARAMETER_INVALID;
+    } else {
+        ISeek *this = (ISeek *) self;
+        interface_lock_shared(this);
+        SLboolean loopEnabled = this->mLoopEnabled;
+        SLmillisecond startPos = this->mStartPos;
+        SLmillisecond endPos = this->mEndPos;
+        interface_unlock_shared(this);
+        *pLoopEnabled = loopEnabled;
+        *pStartPos = startPos;
+        *pEndPos = endPos;
+        result = SL_RESULT_SUCCESS;
+    }
+
+    SL_LEAVE_INTERFACE
+}
+
+
+static const struct SLSeekItf_ ISeek_Itf = {
+    ISeek_SetPosition,
+    ISeek_SetLoop,
+    ISeek_GetLoop
+};
+
+void ISeek_init(void *self)
+{
+    ISeek *this = (ISeek *) self;
+    this->mItf = &ISeek_Itf;
+    this->mPos = (SLmillisecond) SL_TIME_UNKNOWN;
+    this->mStartPos = (SLmillisecond) 0;
+    this->mEndPos = (SLmillisecond) SL_TIME_UNKNOWN;
+    this->mLoopEnabled = SL_BOOLEAN_FALSE;
+}