1 /*
2 * Copyright (C) 2021 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 #define LOG_TAG "CachedStreamBuffer"
17 #include "cached_stream_buffer.h"
18 #include <hardware/gralloc.h>
19 #include <log/log.h>
20 #include <sync/sync.h>
21
22 namespace android::hardware::camera::device::V3_4::implementation {
23
24 namespace {
25 HandleImporter g_importer;
26 }
27
ReleaseFence(int fence_fd)28 ReleaseFence::ReleaseFence(int fence_fd) : handle_(nullptr) {
29 if (fence_fd >= 0) {
30 handle_ = native_handle_create(/*numFds*/ 1, /*numInts*/ 0);
31 handle_->data[0] = fence_fd;
32 }
33 }
34
~ReleaseFence()35 ReleaseFence::~ReleaseFence() {
36 if (handle_ != nullptr) {
37 native_handle_close(handle_);
38 native_handle_delete(handle_);
39 }
40 }
41
CachedStreamBuffer()42 CachedStreamBuffer::CachedStreamBuffer()
43 : buffer_(nullptr), buffer_id_(0), stream_id_(0), acquire_fence_(-1) {}
44
CachedStreamBuffer(const StreamBuffer & buffer)45 CachedStreamBuffer::CachedStreamBuffer(const StreamBuffer& buffer)
46 : buffer_(buffer.buffer.getNativeHandle()),
47 buffer_id_(buffer.bufferId),
48 stream_id_(buffer.streamId),
49 acquire_fence_(-1) {
50 g_importer.importBuffer(buffer_);
51 g_importer.importFence(buffer.acquireFence, acquire_fence_);
52 }
53
CachedStreamBuffer(CachedStreamBuffer && from)54 CachedStreamBuffer::CachedStreamBuffer(CachedStreamBuffer&& from) noexcept {
55 buffer_ = from.buffer_;
56 buffer_id_ = from.buffer_id_;
57 stream_id_ = from.stream_id_;
58 acquire_fence_ = from.acquire_fence_;
59 from.acquire_fence_ = -1;
60 from.buffer_ = nullptr;
61 }
62
operator =(CachedStreamBuffer && from)63 CachedStreamBuffer& CachedStreamBuffer::operator=(
64 CachedStreamBuffer&& from) noexcept {
65 if (this != &from) {
66 buffer_ = from.buffer_;
67 buffer_id_ = from.buffer_id_;
68 stream_id_ = from.stream_id_;
69 acquire_fence_ = from.acquire_fence_;
70 from.acquire_fence_ = -1;
71 from.buffer_ = nullptr;
72 }
73 return *this;
74 }
75
~CachedStreamBuffer()76 CachedStreamBuffer::~CachedStreamBuffer() {
77 if (buffer_ != nullptr) {
78 g_importer.freeBuffer(buffer_);
79 }
80 g_importer.closeFence(acquire_fence_);
81 }
82
importFence(const native_handle_t * fence_handle)83 void CachedStreamBuffer::importFence(const native_handle_t* fence_handle) {
84 g_importer.closeFence(acquire_fence_);
85 g_importer.importFence(fence_handle, acquire_fence_);
86 }
87
acquireAsYUV(int32_t width,int32_t height,int timeout_ms)88 YCbCrLayout CachedStreamBuffer::acquireAsYUV(int32_t width, int32_t height,
89 int timeout_ms) {
90 if (acquire_fence_ >= 0) {
91 if (sync_wait(acquire_fence_, timeout_ms)) {
92 ALOGW("%s: timeout while waiting acquire fence", __FUNCTION__);
93 return {};
94 } else {
95 ::close(acquire_fence_);
96 acquire_fence_ = -1;
97 }
98 }
99 android::Rect region{0, 0, width, height};
100 android_ycbcr result =
101 g_importer.lockYCbCr(buffer_, GRALLOC_USAGE_SW_WRITE_OFTEN, region);
102 if (result.ystride > UINT32_MAX || result.cstride > UINT32_MAX ||
103 result.chroma_step > UINT32_MAX) {
104 ALOGE(
105 "%s: lockYCbCr failed. Unexpected values! ystride: %zu cstride: %zu "
106 "chroma_step: %zu",
107 __FUNCTION__, result.ystride, result.cstride, result.chroma_step);
108 return {};
109 }
110 return {.y = result.y,
111 .cb = result.cb,
112 .cr = result.cr,
113 .yStride = static_cast<uint32_t>(result.ystride),
114 .cStride = static_cast<uint32_t>(result.cstride),
115 .chromaStep = static_cast<uint32_t>(result.chroma_step)};
116 }
117
acquireAsBlob(int32_t size,int timeout_ms)118 void* CachedStreamBuffer::acquireAsBlob(int32_t size, int timeout_ms) {
119 if (acquire_fence_ >= 0) {
120 if (sync_wait(acquire_fence_, timeout_ms)) {
121 return nullptr;
122 } else {
123 ::close(acquire_fence_);
124 acquire_fence_ = -1;
125 }
126 }
127 return g_importer.lock(buffer_, GRALLOC_USAGE_SW_WRITE_OFTEN, size);
128 }
129
release()130 int CachedStreamBuffer::release() { return g_importer.unlock(buffer_); }
131
132 } // namespace android::hardware::camera::device::V3_4::implementation
133