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Diffstat (limited to 'media/libstagefright/omx/ColorConverter.cpp')
-rw-r--r-- | media/libstagefright/omx/ColorConverter.cpp | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/media/libstagefright/omx/ColorConverter.cpp b/media/libstagefright/omx/ColorConverter.cpp deleted file mode 100644 index e74782f..0000000 --- a/media/libstagefright/omx/ColorConverter.cpp +++ /dev/null @@ -1,297 +0,0 @@ -/* - * 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. - */ - -#include <media/stagefright/ColorConverter.h> -#include <media/stagefright/MediaDebug.h> - -namespace android { - -static const int OMX_QCOM_COLOR_FormatYVU420SemiPlanar = 0x7FA30C00; - -ColorConverter::ColorConverter( - OMX_COLOR_FORMATTYPE from, OMX_COLOR_FORMATTYPE to) - : mSrcFormat(from), - mDstFormat(to), - mClip(NULL) { -} - -ColorConverter::~ColorConverter() { - delete[] mClip; - mClip = NULL; -} - -bool ColorConverter::isValid() const { - if (mDstFormat != OMX_COLOR_Format16bitRGB565) { - return false; - } - - switch (mSrcFormat) { - case OMX_COLOR_FormatYUV420Planar: - case OMX_COLOR_FormatCbYCrY: - case OMX_QCOM_COLOR_FormatYVU420SemiPlanar: - return true; - - default: - return false; - } -} - -void ColorConverter::convert( - size_t width, size_t height, - const void *srcBits, size_t srcSkip, - void *dstBits, size_t dstSkip) { - CHECK_EQ(mDstFormat, OMX_COLOR_Format16bitRGB565); - - switch (mSrcFormat) { - case OMX_COLOR_FormatYUV420Planar: - convertYUV420Planar( - width, height, srcBits, srcSkip, dstBits, dstSkip); - break; - - case OMX_COLOR_FormatCbYCrY: - convertCbYCrY( - width, height, srcBits, srcSkip, dstBits, dstSkip); - break; - - case OMX_QCOM_COLOR_FormatYVU420SemiPlanar: - convertQCOMYUV420SemiPlanar( - width, height, srcBits, srcSkip, dstBits, dstSkip); - break; - - default: - { - CHECK(!"Should not be here. Unknown color conversion."); - break; - } - } -} - -void ColorConverter::convertCbYCrY( - size_t width, size_t height, - const void *srcBits, size_t srcSkip, - void *dstBits, size_t dstSkip) { - CHECK_EQ(srcSkip, 0); // Doesn't really make sense for YUV formats. - CHECK(dstSkip >= width * 2); - CHECK((dstSkip & 3) == 0); - - uint8_t *kAdjustedClip = initClip(); - - uint32_t *dst_ptr = (uint32_t *)dstBits; - - const uint8_t *src = (const uint8_t *)srcBits; - - for (size_t y = 0; y < height; ++y) { - for (size_t x = 0; x < width; x += 2) { - signed y1 = (signed)src[2 * x + 1] - 16; - signed y2 = (signed)src[2 * x + 3] - 16; - signed u = (signed)src[2 * x] - 128; - signed v = (signed)src[2 * x + 2] - 128; - - 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 += width * 2; - dst_ptr += dstSkip / 4; - } -} - -void ColorConverter::convertYUV420Planar( - size_t width, size_t height, - const void *srcBits, size_t srcSkip, - void *dstBits, size_t dstSkip) { - CHECK_EQ(srcSkip, 0); // Doesn't really make sense for YUV formats. - CHECK(dstSkip >= width * 2); - CHECK((dstSkip & 3) == 0); - - uint8_t *kAdjustedClip = initClip(); - - uint32_t *dst_ptr = (uint32_t *)dstBits; - const uint8_t *src_y = (const uint8_t *)srcBits; - - const uint8_t *src_u = - (const uint8_t *)src_y + width * height; - - const uint8_t *src_v = - (const uint8_t *)src_u + (width / 2) * (height / 2); - - for (size_t y = 0; y < height; ++y) { - for (size_t x = 0; x < width; 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; - - signed u = (signed)src_u[x / 2] - 128; - signed v = (signed)src_v[x / 2] - 128; - - 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 += width; - - if (y & 1) { - src_u += width / 2; - src_v += width / 2; - } - - dst_ptr += dstSkip / 4; - } -} - -void ColorConverter::convertQCOMYUV420SemiPlanar( - size_t width, size_t height, - const void *srcBits, size_t srcSkip, - void *dstBits, size_t dstSkip) { - CHECK_EQ(srcSkip, 0); // Doesn't really make sense for YUV formats. - CHECK(dstSkip >= width * 2); - CHECK((dstSkip & 3) == 0); - - uint8_t *kAdjustedClip = initClip(); - - uint32_t *dst_ptr = (uint32_t *)dstBits; - const uint8_t *src_y = (const uint8_t *)srcBits; - - const uint8_t *src_u = - (const uint8_t *)src_y + width * height; - - for (size_t y = 0; y < height; ++y) { - for (size_t x = 0; x < width; x += 2) { - signed y1 = (signed)src_y[x] - 16; - signed y2 = (signed)src_y[x + 1] - 16; - - signed u = (signed)src_u[x & ~1] - 128; - signed v = (signed)src_u[(x & ~1) + 1] - 128; - - 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[b1] >> 3) << 11) - | ((kAdjustedClip[g1] >> 2) << 5) - | (kAdjustedClip[r1] >> 3); - - uint32_t rgb2 = - ((kAdjustedClip[b2] >> 3) << 11) - | ((kAdjustedClip[g2] >> 2) << 5) - | (kAdjustedClip[r2] >> 3); - - dst_ptr[x / 2] = (rgb2 << 16) | rgb1; - } - - src_y += width; - - if (y & 1) { - src_u += width; - } - - dst_ptr += dstSkip / 4; - } -} - -uint8_t *ColorConverter::initClip() { - static const signed kClipMin = -278; - static const signed kClipMax = 535; - - if (mClip == NULL) { - mClip = new uint8_t[kClipMax - kClipMin + 1]; - - for (signed i = kClipMin; i <= kClipMax; ++i) { - mClip[i - kClipMin] = (i < 0) ? 0 : (i > 255) ? 255 : (uint8_t)i; - } - } - - return &mClip[-kClipMin]; -} - -} // namespace android |