From f933441648ef6a71dee783d733aac17b9508b452 Mon Sep 17 00:00:00 2001
From: Andreas Huber <andih@google.com>
Date: Wed, 15 Dec 2010 15:17:42 -0800
Subject: Initial support for a true streaming player for mpeg2 transport
 streams.

Change-Id: I153eec439d260a5524b21270e16d36940ec3161a
---
 .../nuplayer/NuPlayerStreamListener.cpp            | 151 +++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 media/libmediaplayerservice/nuplayer/NuPlayerStreamListener.cpp

(limited to 'media/libmediaplayerservice/nuplayer/NuPlayerStreamListener.cpp')

diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerStreamListener.cpp b/media/libmediaplayerservice/nuplayer/NuPlayerStreamListener.cpp
new file mode 100644
index 0000000..92642a8
--- /dev/null
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerStreamListener.cpp
@@ -0,0 +1,151 @@
+/*
+ * 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "NuPlayerStreamListener"
+#include <utils/Log.h>
+
+#include "NuPlayerStreamListener.h"
+
+#include <binder/MemoryDealer.h>
+#include <media/stagefright/foundation/ADebug.h>
+
+namespace android {
+
+NuPlayer::NuPlayerStreamListener::NuPlayerStreamListener(
+        const sp<IStreamSource> &source,
+        ALooper::handler_id id)
+    : mSource(source),
+      mTargetID(id),
+      mEOS(false),
+      mSendDataNotification(true) {
+    mSource->setListener(this);
+
+    mMemoryDealer = new MemoryDealer(kNumBuffers * kBufferSize);
+    for (size_t i = 0; i < kNumBuffers; ++i) {
+        sp<IMemory> mem = mMemoryDealer->allocate(kBufferSize);
+        CHECK(mem != NULL);
+
+        mBuffers.push(mem);
+    }
+    mSource->setBuffers(mBuffers);
+}
+
+void NuPlayer::NuPlayerStreamListener::start() {
+    for (size_t i = 0; i < kNumBuffers; ++i) {
+        mSource->onBufferAvailable(i);
+    }
+}
+
+void NuPlayer::NuPlayerStreamListener::queueBuffer(size_t index, size_t size) {
+    QueueEntry entry;
+    entry.mIsCommand = false;
+    entry.mIndex = index;
+    entry.mSize = size;
+    entry.mOffset = 0;
+
+    Mutex::Autolock autoLock(mLock);
+    mQueue.push_back(entry);
+
+    if (mSendDataNotification) {
+        mSendDataNotification = false;
+        (new AMessage(kWhatMoreDataQueued, mTargetID))->post();
+    }
+}
+
+void NuPlayer::NuPlayerStreamListener::issueCommand(
+        Command cmd, bool synchronous, const sp<AMessage> &extra) {
+    CHECK(!synchronous);
+
+    QueueEntry entry;
+    entry.mIsCommand = true;
+    entry.mCommand = cmd;
+    entry.mExtra = extra;
+
+    Mutex::Autolock autoLock(mLock);
+    mQueue.push_back(entry);
+
+    if (mSendDataNotification) {
+        mSendDataNotification = false;
+        (new AMessage(kWhatMoreDataQueued, mTargetID))->post();
+    }
+}
+
+ssize_t NuPlayer::NuPlayerStreamListener::read(void *data, size_t size) {
+    CHECK_GT(size, 0u);
+
+    Mutex::Autolock autoLock(mLock);
+
+    if (mEOS) {
+        return 0;
+    }
+
+    if (mQueue.empty()) {
+        mSendDataNotification = true;
+
+        return -EWOULDBLOCK;
+    }
+
+    QueueEntry *entry = &*mQueue.begin();
+
+    if (entry->mIsCommand) {
+        switch (entry->mCommand) {
+            case EOS:
+            {
+                mQueue.erase(mQueue.begin());
+                entry = NULL;
+
+                mEOS = true;
+                return 0;
+            }
+
+            case DISCONTINUITY:
+            {
+                mQueue.erase(mQueue.begin());
+                entry = NULL;
+
+                return INFO_DISCONTINUITY;
+            }
+
+            default:
+                TRESPASS();
+                break;
+        }
+    }
+
+    size_t copy = entry->mSize;
+    if (copy > size) {
+        copy = size;
+    }
+
+    memcpy(data,
+           (const uint8_t *)mBuffers.editItemAt(entry->mIndex)->pointer()
+            + entry->mOffset,
+           copy);
+
+    entry->mOffset += copy;
+    entry->mSize -= copy;
+
+    if (entry->mSize == 0) {
+        mSource->onBufferAvailable(entry->mIndex);
+        mQueue.erase(mQueue.begin());
+        entry = NULL;
+    }
+
+    return copy;
+}
+
+}  // namespace android
-- 
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