1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "NuPlayerStreamListener"
19#include <utils/Log.h>
20
21#include "NuPlayerStreamListener.h"
22
23#include <binder/MemoryDealer.h>
24#include <media/stagefright/foundation/ADebug.h>
25#include <media/stagefright/foundation/AMessage.h>
26#include <media/stagefright/MediaErrors.h>
27
28namespace android {
29
30NuPlayer::NuPlayerStreamListener::NuPlayerStreamListener(
31        const sp<IStreamSource> &source,
32        const sp<AHandler> &targetHandler)
33    : mSource(source),
34      mTargetHandler(targetHandler),
35      mEOS(false),
36      mSendDataNotification(true) {
37    mSource->setListener(this);
38
39    mMemoryDealer = new MemoryDealer(kNumBuffers * kBufferSize);
40    for (size_t i = 0; i < kNumBuffers; ++i) {
41        sp<IMemory> mem = mMemoryDealer->allocate(kBufferSize);
42        CHECK(mem != NULL);
43
44        mBuffers.push(mem);
45    }
46    mSource->setBuffers(mBuffers);
47}
48
49void NuPlayer::NuPlayerStreamListener::start() {
50    for (size_t i = 0; i < kNumBuffers; ++i) {
51        mSource->onBufferAvailable(i);
52    }
53}
54
55void NuPlayer::NuPlayerStreamListener::queueBuffer(size_t index, size_t size) {
56    QueueEntry entry;
57    entry.mIsCommand = false;
58    entry.mIndex = index;
59    entry.mSize = size;
60    entry.mOffset = 0;
61
62    Mutex::Autolock autoLock(mLock);
63    mQueue.push_back(entry);
64
65    if (mSendDataNotification) {
66        mSendDataNotification = false;
67
68        if (mTargetHandler != NULL) {
69            (new AMessage(kWhatMoreDataQueued, mTargetHandler))->post();
70        }
71    }
72}
73
74void NuPlayer::NuPlayerStreamListener::issueCommand(
75        Command cmd, bool synchronous, const sp<AMessage> &extra) {
76    CHECK(!synchronous);
77
78    QueueEntry entry;
79    entry.mIsCommand = true;
80    entry.mCommand = cmd;
81    entry.mExtra = extra;
82
83    Mutex::Autolock autoLock(mLock);
84    mQueue.push_back(entry);
85
86    if (mSendDataNotification) {
87        mSendDataNotification = false;
88
89        if (mTargetHandler != NULL) {
90            (new AMessage(kWhatMoreDataQueued, mTargetHandler))->post();
91        }
92    }
93}
94
95ssize_t NuPlayer::NuPlayerStreamListener::read(
96        void *data, size_t size, sp<AMessage> *extra) {
97    CHECK_GT(size, 0u);
98
99    extra->clear();
100
101    Mutex::Autolock autoLock(mLock);
102
103    if (mEOS) {
104        return 0;
105    }
106
107    if (mQueue.empty()) {
108        mSendDataNotification = true;
109
110        return -EWOULDBLOCK;
111    }
112
113    QueueEntry *entry = &*mQueue.begin();
114
115    if (entry->mIsCommand) {
116        switch (entry->mCommand) {
117            case EOS:
118            {
119                mQueue.erase(mQueue.begin());
120                entry = NULL;
121
122                mEOS = true;
123                return 0;
124            }
125
126            case DISCONTINUITY:
127            {
128                *extra = entry->mExtra;
129
130                mQueue.erase(mQueue.begin());
131                entry = NULL;
132
133                return INFO_DISCONTINUITY;
134            }
135
136            default:
137                TRESPASS();
138                break;
139        }
140    }
141
142    size_t copy = entry->mSize;
143    if (copy > size) {
144        copy = size;
145    }
146
147    if (entry->mIndex >= mBuffers.size()) {
148        return ERROR_MALFORMED;
149    }
150
151    sp<IMemory> mem = mBuffers.editItemAt(entry->mIndex);
152    if (mem == NULL || mem->size() < copy || mem->size() - copy < entry->mOffset) {
153        return ERROR_MALFORMED;
154    }
155
156    memcpy(data,
157           (const uint8_t *)mem->pointer()
158            + entry->mOffset,
159           copy);
160
161    entry->mOffset += copy;
162    entry->mSize -= copy;
163
164    if (entry->mSize == 0) {
165        mSource->onBufferAvailable(entry->mIndex);
166        mQueue.erase(mQueue.begin());
167        entry = NULL;
168    }
169
170    return copy;
171}
172
173}  // namespace android
174