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| 1 /* | |
| 2 * Copyright 2015 The WebRTC project authors. All Rights Reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include "webrtc/api/android/jni/native_handle_impl.h" | |
| 12 | |
| 13 #include <memory> | |
| 14 | |
| 15 #include "webrtc/api/android/jni/jni_helpers.h" | |
| 16 #include "webrtc/base/bind.h" | |
| 17 #include "webrtc/base/checks.h" | |
| 18 #include "webrtc/base/keep_ref_until_done.h" | |
| 19 #include "webrtc/base/logging.h" | |
| 20 #include "webrtc/base/scoped_ref_ptr.h" | |
| 21 | |
| 22 using webrtc::NativeHandleBuffer; | |
| 23 | |
| 24 namespace webrtc_jni { | |
| 25 | |
| 26 Matrix::Matrix(JNIEnv* jni, jfloatArray a) { | |
| 27 RTC_CHECK_EQ(16, jni->GetArrayLength(a)); | |
| 28 jfloat* ptr = jni->GetFloatArrayElements(a, nullptr); | |
| 29 for (int i = 0; i < 16; ++i) { | |
| 30 elem_[i] = ptr[i]; | |
| 31 } | |
| 32 jni->ReleaseFloatArrayElements(a, ptr, 0); | |
| 33 } | |
| 34 | |
| 35 jfloatArray Matrix::ToJava(JNIEnv* jni) { | |
| 36 jfloatArray matrix = jni->NewFloatArray(16); | |
| 37 jni->SetFloatArrayRegion(matrix, 0, 16, elem_); | |
| 38 return matrix; | |
| 39 } | |
| 40 | |
| 41 void Matrix::Rotate(webrtc::VideoRotation rotation) { | |
| 42 // Texture coordinates are in the range 0 to 1. The transformation of the last | |
| 43 // row in each rotation matrix is needed for proper translation, e.g, to | |
| 44 // mirror x, we don't replace x by -x, but by 1-x. | |
| 45 switch (rotation) { | |
| 46 case webrtc::kVideoRotation_0: | |
| 47 break; | |
| 48 case webrtc::kVideoRotation_90: { | |
| 49 const float ROTATE_90[16] = | |
| 50 { elem_[4], elem_[5], elem_[6], elem_[7], | |
| 51 -elem_[0], -elem_[1], -elem_[2], -elem_[3], | |
| 52 elem_[8], elem_[9], elem_[10], elem_[11], | |
| 53 elem_[0] + elem_[12], elem_[1] + elem_[13], | |
| 54 elem_[2] + elem_[14], elem_[3] + elem_[15]}; | |
| 55 memcpy(elem_, ROTATE_90, sizeof(elem_)); | |
| 56 } break; | |
| 57 case webrtc::kVideoRotation_180: { | |
| 58 const float ROTATE_180[16] = | |
| 59 { -elem_[0], -elem_[1], -elem_[2], -elem_[3], | |
| 60 -elem_[4], -elem_[5], -elem_[6], -elem_[7], | |
| 61 elem_[8], elem_[9], elem_[10], elem_[11], | |
| 62 elem_[0] + elem_[4] + elem_[12], elem_[1] + elem_[5] + elem_[13], | |
| 63 elem_[2] + elem_[6] + elem_[14], elem_[3] + elem_[11]+ elem_[15]}; | |
| 64 memcpy(elem_, ROTATE_180, sizeof(elem_)); | |
| 65 } break; | |
| 66 case webrtc::kVideoRotation_270: { | |
| 67 const float ROTATE_270[16] = | |
| 68 { -elem_[4], -elem_[5], -elem_[6], -elem_[7], | |
| 69 elem_[0], elem_[1], elem_[2], elem_[3], | |
| 70 elem_[8], elem_[9], elem_[10], elem_[11], | |
| 71 elem_[4] + elem_[12], elem_[5] + elem_[13], | |
| 72 elem_[6] + elem_[14], elem_[7] + elem_[15]}; | |
| 73 memcpy(elem_, ROTATE_270, sizeof(elem_)); | |
| 74 } break; | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 // Calculates result = a * b, in column-major order. | |
| 79 void Matrix::Multiply(const float a[16], const float b[16], float result[16]) { | |
| 80 for (int i = 0; i < 4; ++i) { | |
| 81 for (int j = 0; j < 4; ++j) { | |
| 82 float sum = 0; | |
| 83 for (int k = 0; k < 4; ++k) { | |
| 84 sum += a[k * 4 + j] * b[i * 4 + k]; | |
| 85 } | |
| 86 result[i * 4 + j] = sum; | |
| 87 } | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 // Center crop by keeping xFraction of the width and yFraction of the height, | |
| 92 // so e.g. cropping from 640x480 to 640x360 would use | |
| 93 // xFraction=1, yFraction=360/480. | |
| 94 void Matrix::Crop(float xFraction, | |
| 95 float yFraction, | |
| 96 float xOffset, | |
| 97 float yOffset) { | |
| 98 const float crop_matrix[16] = | |
| 99 {xFraction, 0, 0, 0, | |
| 100 0, yFraction, 0, 0, | |
| 101 0, 0, 1, 0, | |
| 102 xOffset, yOffset, 0, 1}; | |
| 103 const Matrix old = *this; | |
| 104 Multiply(crop_matrix, old.elem_, this->elem_); | |
| 105 } | |
| 106 | |
| 107 // Aligning pointer to 64 bytes for improved performance, e.g. use SIMD. | |
| 108 static const int kBufferAlignment = 64; | |
| 109 | |
| 110 NativeHandleImpl::NativeHandleImpl(int id, const Matrix& matrix) | |
| 111 : oes_texture_id(id), sampling_matrix(matrix) {} | |
| 112 | |
| 113 NativeHandleImpl::NativeHandleImpl(JNIEnv* jni, | |
| 114 jint j_oes_texture_id, | |
| 115 jfloatArray j_transform_matrix) | |
| 116 : oes_texture_id(j_oes_texture_id), | |
| 117 sampling_matrix(jni, j_transform_matrix) {} | |
| 118 | |
| 119 AndroidTextureBuffer::AndroidTextureBuffer( | |
| 120 int width, | |
| 121 int height, | |
| 122 const NativeHandleImpl& native_handle, | |
| 123 jobject surface_texture_helper, | |
| 124 const rtc::Callback0<void>& no_longer_used) | |
| 125 : webrtc::NativeHandleBuffer(&native_handle_, width, height), | |
| 126 native_handle_(native_handle), | |
| 127 surface_texture_helper_(surface_texture_helper), | |
| 128 no_longer_used_cb_(no_longer_used) {} | |
| 129 | |
| 130 AndroidTextureBuffer::~AndroidTextureBuffer() { | |
| 131 no_longer_used_cb_(); | |
| 132 } | |
| 133 | |
| 134 rtc::scoped_refptr<webrtc::VideoFrameBuffer> | |
| 135 AndroidTextureBuffer::NativeToI420Buffer() { | |
| 136 int uv_width = (width()+7) / 8; | |
| 137 int stride = 8 * uv_width; | |
| 138 int uv_height = (height()+1)/2; | |
| 139 size_t size = stride * (height() + uv_height); | |
| 140 // The data is owned by the frame, and the normal case is that the | |
| 141 // data is deleted by the frame's destructor callback. | |
| 142 // | |
| 143 // TODO(nisse): Use an I420BufferPool. We then need to extend that | |
| 144 // class, and I420Buffer, to support our memory layout. | |
| 145 std::unique_ptr<uint8_t, webrtc::AlignedFreeDeleter> yuv_data( | |
| 146 static_cast<uint8_t*>(webrtc::AlignedMalloc(size, kBufferAlignment))); | |
| 147 // See YuvConverter.java for the required layout. | |
| 148 uint8_t* y_data = yuv_data.get(); | |
| 149 uint8_t* u_data = y_data + height() * stride; | |
| 150 uint8_t* v_data = u_data + stride/2; | |
| 151 | |
| 152 rtc::scoped_refptr<webrtc::VideoFrameBuffer> copy = | |
| 153 new rtc::RefCountedObject<webrtc::WrappedI420Buffer>( | |
| 154 width(), height(), | |
| 155 y_data, stride, | |
| 156 u_data, stride, | |
| 157 v_data, stride, | |
| 158 rtc::Bind(&webrtc::AlignedFree, yuv_data.release())); | |
| 159 | |
| 160 JNIEnv* jni = AttachCurrentThreadIfNeeded(); | |
| 161 ScopedLocalRefFrame local_ref_frame(jni); | |
| 162 | |
| 163 jmethodID transform_mid = GetMethodID( | |
| 164 jni, | |
| 165 GetObjectClass(jni, surface_texture_helper_), | |
| 166 "textureToYUV", | |
| 167 "(Ljava/nio/ByteBuffer;IIII[F)V"); | |
| 168 | |
| 169 jobject byte_buffer = jni->NewDirectByteBuffer(y_data, size); | |
| 170 | |
| 171 jfloatArray sampling_matrix = native_handle_.sampling_matrix.ToJava(jni); | |
| 172 jni->CallVoidMethod(surface_texture_helper_, | |
| 173 transform_mid, | |
| 174 byte_buffer, width(), height(), stride, | |
| 175 native_handle_.oes_texture_id, sampling_matrix); | |
| 176 CHECK_EXCEPTION(jni) << "textureToYUV throwed an exception"; | |
| 177 | |
| 178 return copy; | |
| 179 } | |
| 180 | |
| 181 rtc::scoped_refptr<AndroidTextureBuffer> | |
| 182 AndroidTextureBuffer::CropScaleAndRotate(int cropped_width, | |
| 183 int cropped_height, | |
| 184 int crop_x, | |
| 185 int crop_y, | |
| 186 int dst_width, | |
| 187 int dst_height, | |
| 188 webrtc::VideoRotation rotation) { | |
| 189 if (cropped_width == dst_width && cropped_height == dst_height && | |
| 190 width() == dst_width && height() == dst_height && | |
| 191 rotation == webrtc::kVideoRotation_0) { | |
| 192 return this; | |
| 193 } | |
| 194 int rotated_width = (rotation % 180 == 0) ? dst_width : dst_height; | |
| 195 int rotated_height = (rotation % 180 == 0) ? dst_height : dst_width; | |
| 196 | |
| 197 // Here we use Bind magic to add a reference count to |this| until the newly | |
| 198 // created AndroidTextureBuffer is destructed | |
| 199 rtc::scoped_refptr<AndroidTextureBuffer> buffer( | |
| 200 new rtc::RefCountedObject<AndroidTextureBuffer>( | |
| 201 rotated_width, rotated_height, native_handle_, | |
| 202 surface_texture_helper_, rtc::KeepRefUntilDone(this))); | |
| 203 | |
| 204 if (cropped_width != width() || cropped_height != height()) { | |
| 205 buffer->native_handle_.sampling_matrix.Crop( | |
| 206 cropped_width / static_cast<float>(width()), | |
| 207 cropped_height / static_cast<float>(height()), | |
| 208 crop_x / static_cast<float>(width()), | |
| 209 crop_y / static_cast<float>(height())); | |
| 210 } | |
| 211 buffer->native_handle_.sampling_matrix.Rotate(rotation); | |
| 212 return buffer; | |
| 213 } | |
| 214 | |
| 215 } // namespace webrtc_jni | |
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Chromium Code Reviews
Issue 2547483003:
Move /webrtc/api/android files to /webrtc/sdk/android (Closed)
