| /* |
| * Copyright (C) 2009 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_TAG "SoftwareRenderer" |
| #include <utils/Log.h> |
| |
| #undef NDEBUG |
| #include <assert.h> |
| |
| #include <binder/MemoryHeapBase.h> |
| #include <media/stagefright/SoftwareRenderer.h> |
| #include <ui/ISurface.h> |
| |
| namespace android { |
| |
| #define QCOM_YUV 0 |
| |
| SoftwareRenderer::SoftwareRenderer( |
| const sp<ISurface> &surface, |
| size_t displayWidth, size_t displayHeight, |
| size_t decodedWidth, size_t decodedHeight) |
| : mISurface(surface), |
| mDisplayWidth(displayWidth), |
| mDisplayHeight(displayHeight), |
| mDecodedWidth(decodedWidth), |
| mDecodedHeight(decodedHeight), |
| mFrameSize(mDecodedWidth * mDecodedHeight * 2), // RGB565 |
| mMemoryHeap(new MemoryHeapBase(2 * mFrameSize)), |
| mIndex(0) { |
| assert(mISurface.get() != NULL); |
| assert(mDecodedWidth > 0); |
| assert(mDecodedHeight > 0); |
| assert(mMemoryHeap->heapID() >= 0); |
| |
| ISurface::BufferHeap bufferHeap( |
| mDisplayWidth, mDisplayHeight, |
| mDecodedWidth, mDecodedHeight, |
| PIXEL_FORMAT_RGB_565, |
| mMemoryHeap); |
| |
| status_t err = mISurface->registerBuffers(bufferHeap); |
| assert(err == OK); |
| } |
| |
| SoftwareRenderer::~SoftwareRenderer() { |
| mISurface->unregisterBuffers(); |
| } |
| |
| void SoftwareRenderer::render( |
| const void *data, size_t size, void *platformPrivate) { |
| assert(size >= (mDecodedWidth * mDecodedHeight * 3) / 2); |
| |
| static const signed kClipMin = -278; |
| static const signed kClipMax = 535; |
| static uint8_t kClip[kClipMax - kClipMin + 1]; |
| static uint8_t *kAdjustedClip = &kClip[-kClipMin]; |
| |
| static bool clipInitialized = false; |
| |
| if (!clipInitialized) { |
| for (signed i = kClipMin; i <= kClipMax; ++i) { |
| kClip[i - kClipMin] = (i < 0) ? 0 : (i > 255) ? 255 : (uint8_t)i; |
| } |
| clipInitialized = true; |
| } |
| |
| size_t offset = mIndex * mFrameSize; |
| |
| void *dst = (uint8_t *)mMemoryHeap->getBase() + offset; |
| |
| uint32_t *dst_ptr = (uint32_t *)dst; |
| |
| const uint8_t *src_y = (const uint8_t *)data; |
| |
| const uint8_t *src_u = |
| (const uint8_t *)src_y + mDecodedWidth * mDecodedHeight; |
| |
| #if !QCOM_YUV |
| const uint8_t *src_v = |
| (const uint8_t *)src_u + (mDecodedWidth / 2) * (mDecodedHeight / 2); |
| #endif |
| |
| for (size_t y = 0; y < mDecodedHeight; ++y) { |
| for (size_t x = 0; x < mDecodedWidth; x += 2) { |
| // B = 1.164 * (Y - 16) + 2.018 * (U - 128) |
| // G = 1.164 * (Y - 16) - 0.813 * (V - 128) - 0.391 * (U - 128) |
| // R = 1.164 * (Y - 16) + 1.596 * (V - 128) |
| |
| // B = 298/256 * (Y - 16) + 517/256 * (U - 128) |
| // G = .................. - 208/256 * (V - 128) - 100/256 * (U - 128) |
| // R = .................. + 409/256 * (V - 128) |
| |
| // min_B = (298 * (- 16) + 517 * (- 128)) / 256 = -277 |
| // min_G = (298 * (- 16) - 208 * (255 - 128) - 100 * (255 - 128)) / 256 = -172 |
| // min_R = (298 * (- 16) + 409 * (- 128)) / 256 = -223 |
| |
| // max_B = (298 * (255 - 16) + 517 * (255 - 128)) / 256 = 534 |
| // max_G = (298 * (255 - 16) - 208 * (- 128) - 100 * (- 128)) / 256 = 432 |
| // max_R = (298 * (255 - 16) + 409 * (255 - 128)) / 256 = 481 |
| |
| // clip range -278 .. 535 |
| |
| signed y1 = (signed)src_y[x] - 16; |
| signed y2 = (signed)src_y[x + 1] - 16; |
| |
| #if QCOM_YUV |
| signed u = (signed)src_u[x & ~1] - 128; |
| signed v = (signed)src_u[(x & ~1) + 1] - 128; |
| #else |
| signed u = (signed)src_u[x / 2] - 128; |
| signed v = (signed)src_v[x / 2] - 128; |
| #endif |
| |
| signed u_b = u * 517; |
| signed u_g = -u * 100; |
| signed v_g = -v * 208; |
| signed v_r = v * 409; |
| |
| signed tmp1 = y1 * 298; |
| signed b1 = (tmp1 + u_b) / 256; |
| signed g1 = (tmp1 + v_g + u_g) / 256; |
| signed r1 = (tmp1 + v_r) / 256; |
| |
| signed tmp2 = y2 * 298; |
| signed b2 = (tmp2 + u_b) / 256; |
| signed g2 = (tmp2 + v_g + u_g) / 256; |
| signed r2 = (tmp2 + v_r) / 256; |
| |
| uint32_t rgb1 = |
| ((kAdjustedClip[r1] >> 3) << 11) |
| | ((kAdjustedClip[g1] >> 2) << 5) |
| | (kAdjustedClip[b1] >> 3); |
| |
| uint32_t rgb2 = |
| ((kAdjustedClip[r2] >> 3) << 11) |
| | ((kAdjustedClip[g2] >> 2) << 5) |
| | (kAdjustedClip[b2] >> 3); |
| |
| dst_ptr[x / 2] = (rgb2 << 16) | rgb1; |
| } |
| |
| src_y += mDecodedWidth; |
| |
| if (y & 1) { |
| #if QCOM_YUV |
| src_u += mDecodedWidth; |
| #else |
| src_u += mDecodedWidth / 2; |
| src_v += mDecodedWidth / 2; |
| #endif |
| } |
| |
| dst_ptr += mDecodedWidth / 2; |
| } |
| |
| mISurface->postBuffer(offset); |
| mIndex = 1 - mIndex; |
| } |
| |
| } // namespace android |