Add "--bugreport" option to screenrecord

The --bugreport option adds two visible features: (1) a timestamp
overlay that (mostly) matches logcat, making it easier to match what
appears in the video with what's in the log, and (2) an "info page"
at the start of the video that shows the system configuration.

Enabling this option adds an additional composition step,
increasing the overhead of screenrecord.  Depending on the device
and circumstances, this may be unnoticeable or very pronounced.
If --bugreport is not enabled, the overhead of screenrecord is
unchanged.

We also now track device orientation changes.  This is currently
detected by polling surfaceflinger, which is suboptimal.  As a
result, we detect the rotation too late, and get a weird mixed
frame before the start of the animation for 90-degree changes.

Also, allow the bit rate to be specified as e.g. "4M" for 4Mbps.

Also, --rotate is now deprecated.

Bug 11220305
Bug 11136964

Change-Id: Ibb94b81d2f73547b95d7a47e027da75fab187a4f

1 files changed, 349 insertions, 0 deletions

diff --git a/cmds/screenrecord/TextRenderer.cpp b/cmds/screenrecord/TextRenderer.cpp
new file mode 100644
index 0000000..048d382
--- /dev/null
+++ b/cmds/screenrecord/TextRenderer.cpp
@@ -0,0 +1,349 @@
+/*
+ * Copyright 2013 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 "ScreenRecord"
+//#define LOG_NDEBUG 0
+#include <utils/Log.h>
+
+#include "TextRenderer.h"
+
+#include <assert.h>
+
+namespace android {
+#include "FontBitmap.h"
+};
+
+using namespace android;
+
+const char TextRenderer::kWhitespace[] = " \t\n\r";
+
+bool TextRenderer::mInitialized = false;
+uint32_t TextRenderer::mXOffset[FontBitmap::numGlyphs];
+
+void TextRenderer::initOnce() {
+    if (!mInitialized) {
+        initXOffset();
+        mInitialized = true;
+    }
+}
+
+void TextRenderer::initXOffset() {
+    // Generate a table of X offsets.  They start at zero and reset whenever
+    // we move down a line (i.e. the Y offset changes).  The offset increases
+    // by one pixel more than the width because the generator left a gap to
+    // avoid reading pixels from adjacent glyphs in the texture filter.
+    uint16_t offset = 0;
+    uint16_t prevYOffset = (int16_t) -1;
+    for (unsigned int i = 0; i < FontBitmap::numGlyphs; i++) {
+        if (prevYOffset != FontBitmap::yoffset[i]) {
+            prevYOffset = FontBitmap::yoffset[i];
+            offset = 0;
+        }
+        mXOffset[i] = offset;
+        offset += FontBitmap::glyphWidth[i] + 1;
+    }
+}
+
+static bool isPowerOfTwo(uint32_t val) {
+    // a/k/a "is exactly one bit set"; note returns true for 0
+    return (val & (val -1)) == 0;
+}
+
+static uint32_t powerOfTwoCeil(uint32_t val) {
+    // drop it, smear the bits across, pop it
+    val--;
+    val |= val >> 1;
+    val |= val >> 2;
+    val |= val >> 4;
+    val |= val >> 8;
+    val |= val >> 16;
+    val++;
+
+    return val;
+}
+
+float TextRenderer::getGlyphHeight() const {
+    return FontBitmap::maxGlyphHeight;
+}
+
+status_t TextRenderer::loadIntoTexture() {
+    ALOGV("Font::loadIntoTexture");
+
+    glGenTextures(1, &mTextureName);
+    if (mTextureName == 0) {
+        ALOGE("glGenTextures failed: %#x", glGetError());
+        return UNKNOWN_ERROR;
+    }
+    glBindTexture(GL_TEXTURE_2D, mTextureName);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+    // The pixel data is stored as combined color+alpha, 8 bits per pixel.
+    // It's guaranteed to be a power-of-two wide, but we cut off the height
+    // where the data ends.  We want to expand it to a power-of-two bitmap
+    // with ARGB data and hand that to glTexImage2D.
+
+    if (!isPowerOfTwo(FontBitmap::width)) {
+        ALOGE("npot glyph bitmap width %u", FontBitmap::width);
+        return UNKNOWN_ERROR;
+    }
+
+    uint32_t potHeight = powerOfTwoCeil(FontBitmap::height);
+    uint32_t* rgbaPixels = new uint32_t[FontBitmap::width * potHeight];
+    memset(rgbaPixels, 0, FontBitmap::width * potHeight * 4);
+
+    for (unsigned int i = 0; i < FontBitmap::width * FontBitmap::height; i++) {
+        uint8_t alpha, color;
+        if ((FontBitmap::pixels[i] & 1) == 0) {
+            // black pixel with varying alpha
+            color = 0x00;
+            alpha = FontBitmap::pixels[i] & ~1;
+        } else {
+            // opaque grey pixel
+            color = FontBitmap::pixels[i] & ~1;
+            alpha = 0xff;
+        }
+        rgbaPixels[i] = (alpha << 24) | (color << 16) | (color << 8) | color;
+    }
+
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, FontBitmap::width, potHeight, 0,
+            GL_RGBA, GL_UNSIGNED_BYTE, rgbaPixels);
+    delete[] rgbaPixels;
+    GLint glErr = glGetError();
+    if (glErr != 0) {
+        ALOGE("glTexImage2D failed: %#x", glErr);
+        return UNKNOWN_ERROR;
+    }
+    return NO_ERROR;
+}
+
+void TextRenderer::setProportionalScale(float linesPerScreen) {
+    if (mScreenWidth == 0 || mScreenHeight == 0) {
+        ALOGW("setFontScale: can't set scale for width=%d height=%d",
+                mScreenWidth, mScreenHeight);
+        return;
+    }
+    float tallest = mScreenWidth > mScreenHeight ? mScreenWidth : mScreenHeight;
+    setScale(tallest / (linesPerScreen * getGlyphHeight()));
+}
+
+float TextRenderer::computeScaledStringWidth(const String8& str8) const {
+    // String8.length() isn't documented, but I'm assuming it will return
+    // the number of characters rather than the number of bytes.  Since
+    // we can only display ASCII we want to ignore anything else, so we
+    // just convert to char* -- but String8 doesn't document what it does
+    // with values outside 0-255.  So just convert to char* and use strlen()
+    // to see what we get.
+    const char* str = str8.string();
+    return computeScaledStringWidth(str, strlen(str));
+}
+
+float TextRenderer::computeScaledStringWidth(const char* str,
+        size_t len) const {
+    float width = 0.0f;
+    for (size_t i = 0; i < len; i++) {
+        size_t chi = str[i] - FontBitmap::firstGlyphChar;
+        float glyphWidth = FontBitmap::glyphWidth[chi];
+        width += (glyphWidth - 1 - FontBitmap::outlineWidth) * mScale;
+    }
+
+    return width;
+}
+
+void TextRenderer::drawString(const Program& program, const float* texMatrix,
+        float x, float y, const String8& str8) const {
+    ALOGV("drawString %.3f,%.3f '%s' (scale=%.3f)", x, y, str8.string(),mScale);
+    initOnce();
+
+    // We want to draw the entire string with a single GLES call.  We
+    // generate two arrays, one with screen coordinates, one with texture
+    // coordinates.  Need two triangles per character.
+    const char* str = str8.string();
+    size_t len = strlen(str);       // again, unsure about String8 handling
+
+    const size_t quadCoords =
+            2 /*triangles*/ * 3 /*vertex/tri*/ * 2 /*coord/vertex*/;
+    float vertices[len * quadCoords];
+    float texes[len * quadCoords];
+
+    float fullTexWidth = FontBitmap::width;
+    float fullTexHeight = powerOfTwoCeil(FontBitmap::height);
+    for (size_t i = 0; i < len; i++) {
+        size_t chi = str[i] - FontBitmap::firstGlyphChar;
+        if (chi >= FontBitmap::numGlyphs) {
+            chi = '?' - FontBitmap::firstGlyphChar;
+            assert(chi < FontBitmap::numGlyphs);
+        }
+        float glyphWidth = FontBitmap::glyphWidth[chi];
+        float glyphHeight = FontBitmap::maxGlyphHeight;
+
+        float vertLeft = x;
+        float vertRight = x + glyphWidth * mScale;
+        float vertTop = y;
+        float vertBottom = y + glyphHeight * mScale;
+
+        // Lowest-numbered glyph is in top-left of bitmap, which puts it at
+        // the bottom-left in texture coordinates.
+        float texLeft = mXOffset[chi] / fullTexWidth;
+        float texRight = (mXOffset[chi] + glyphWidth) / fullTexWidth;
+        float texTop = FontBitmap::yoffset[chi] / fullTexHeight;
+        float texBottom = (FontBitmap::yoffset[chi] + glyphHeight) /
+                fullTexHeight;
+
+        size_t off = i * quadCoords;
+        vertices[off +  0] = vertLeft;
+        vertices[off +  1] = vertBottom;
+        vertices[off +  2] = vertRight;
+        vertices[off +  3] = vertBottom;
+        vertices[off +  4] = vertLeft;
+        vertices[off +  5] = vertTop;
+        vertices[off +  6] = vertLeft;
+        vertices[off +  7] = vertTop;
+        vertices[off +  8] = vertRight;
+        vertices[off +  9] = vertBottom;
+        vertices[off + 10] = vertRight;
+        vertices[off + 11] = vertTop;
+        texes[off +  0] = texLeft;
+        texes[off +  1] = texBottom;
+        texes[off +  2] = texRight;
+        texes[off +  3] = texBottom;
+        texes[off +  4] = texLeft;
+        texes[off +  5] = texTop;
+        texes[off +  6] = texLeft;
+        texes[off +  7] = texTop;
+        texes[off +  8] = texRight;
+        texes[off +  9] = texBottom;
+        texes[off + 10] = texRight;
+        texes[off + 11] = texTop;
+
+        // We added 1-pixel padding in the texture, so we want to advance by
+        // one less.  Also, each glyph is surrounded by a black outline, which
+        // we want to merge.
+        x += (glyphWidth - 1 - FontBitmap::outlineWidth) * mScale;
+    }
+
+    program.drawTriangles(mTextureName, texMatrix, vertices, texes,
+            len * quadCoords / 2);
+}
+
+float TextRenderer::drawWrappedString(const Program& texRender,
+        float xpos, float ypos, const String8& str) {
+    ALOGV("drawWrappedString %.3f,%.3f '%s'", xpos, ypos, str.string());
+    initOnce();
+
+    if (mScreenWidth == 0 || mScreenHeight == 0) {
+        ALOGW("drawWrappedString: can't wrap with width=%d height=%d",
+                mScreenWidth, mScreenHeight);
+        return ypos;
+    }
+
+    const float indentWidth = mIndentMult * getScale();
+    if (xpos < mBorderWidth) {
+        xpos = mBorderWidth;
+    }
+    if (ypos < mBorderWidth) {
+        ypos = mBorderWidth;
+    }
+
+    const size_t maxWidth = (mScreenWidth - mBorderWidth) - xpos;
+    if (maxWidth < 1) {
+        ALOGE("Unable to render text: xpos=%.3f border=%.3f width=%u",
+                xpos, mBorderWidth, mScreenWidth);
+        return ypos;
+    }
+    float stringWidth = computeScaledStringWidth(str);
+    if (stringWidth <= maxWidth) {
+        // Trivial case.
+        drawString(texRender, Program::kIdentity, xpos, ypos, str);
+        ypos += getScaledGlyphHeight();
+    } else {
+        // We need to break the string into pieces, ideally at whitespace
+        // boundaries.
+        char* mangle = strdup(str.string());
+        char* start = mangle;
+        while (start != NULL) {
+            float xposAdj = (start == mangle) ? xpos : xpos + indentWidth;
+            char* brk = breakString(start,
+                    (float) (mScreenWidth - mBorderWidth - xposAdj));
+            if (brk == NULL) {
+                // draw full string
+                drawString(texRender, Program::kIdentity, xposAdj, ypos,
+                        String8(start));
+                start = NULL;
+            } else {
+                // draw partial string
+                char ch = *brk;
+                *brk = '\0';
+                drawString(texRender, Program::kIdentity, xposAdj, ypos,
+                        String8(start));
+                *brk = ch;
+                start = brk;
+                if (strchr(kWhitespace, ch) != NULL) {
+                    // if we broke on whitespace, skip past it
+                    start++;
+                }
+            }
+            ypos += getScaledGlyphHeight();
+        }
+        free(mangle);
+    }
+
+    return ypos;
+}
+
+char* TextRenderer::breakString(const char* str, float maxWidth) const {
+    // Ideally we'd do clever things like binary search.  Not bothering.
+    ALOGV("breakString '%s' %.3f", str, maxWidth);
+
+    size_t len = strlen(str);
+    if (len == 0) {
+        // Caller should detect this and not advance ypos.
+        return NULL;
+    }
+
+    float stringWidth = computeScaledStringWidth(str, len);
+    if (stringWidth <= maxWidth) {
+        return NULL;        // trivial -- use full string
+    }
+
+    // Find the longest string that will fit.
+    size_t goodPos = 0;
+    for (size_t i = 0; i < len; i++) {
+        stringWidth = computeScaledStringWidth(str, i);
+        if (stringWidth < maxWidth) {
+            goodPos = i;
+        } else {
+            break;  // too big
+        }
+    }
+    if (goodPos == 0) {
+        // space is too small to hold any glyph; output a single char
+        ALOGW("Couldn't find a nonzero prefix that fit from '%s'", str);
+        goodPos = 1;
+    }
+
+    // Scan back for whitespace.  If we can't find any we'll just have
+    // an ugly mid-word break.
+    for (size_t i = goodPos; i > 0; i--) {
+        if (strchr(kWhitespace, str[i]) != NULL) {
+            goodPos = i;
+            break;
+        }
+    }
+
+    ALOGV("goodPos=%d for str='%s'", goodPos, str);
+    return const_cast<char*>(str + goodPos);
+}