Bug 808030 - Make camera default to smallest non-0x0 thumbnail size with reduced quality. r=cjones

dom/camera/CameraCommon.h

@@ -77,6 +77,9 @@ enum {
   CAMERA_PARAM_FOCUSDISTANCEOPTIMUM,
   CAMERA_PARAM_FOCUSDISTANCEFAR,
   CAMERA_PARAM_EXPOSURECOMPENSATION,
+  CAMERA_PARAM_THUMBNAILWIDTH,
+  CAMERA_PARAM_THUMBNAILHEIGHT,
+  CAMERA_PARAM_THUMBNAILQUALITY,
 
   CAMERA_PARAM_SUPPORTED_PREVIEWSIZES,
   CAMERA_PARAM_SUPPORTED_VIDEOSIZES,
@@ -93,7 +96,8 @@ enum {
   CAMERA_PARAM_SUPPORTED_MAXEXPOSURECOMPENSATION,
   CAMERA_PARAM_SUPPORTED_EXPOSURECOMPENSATIONSTEP,
   CAMERA_PARAM_SUPPORTED_ZOOM,
-  CAMERA_PARAM_SUPPORTED_ZOOMRATIOS
+  CAMERA_PARAM_SUPPORTED_ZOOMRATIOS,
+  CAMERA_PARAM_SUPPORTED_JPEG_THUMBNAIL_SIZES
 };
 
 #ifdef PR_LOGGING

dom/camera/GonkCameraControl.cpp

@@ -29,6 +29,7 @@
 #include "nsThread.h"
 #include <media/MediaProfiles.h>
 #include "mozilla/FileUtils.h"
+#include "nsAlgorithm.h"
 #include <media/mediaplayer.h>
 #include "nsDirectoryServiceDefs.h" // for NS_GetSpecialDirectory
 #include "nsPrintfCString.h"
@@ -72,6 +73,13 @@ static const char* getKeyText(uint32_t aKey)
       return CameraParameters::KEY_FOCUS_DISTANCES;
     case CAMERA_PARAM_EXPOSURECOMPENSATION:
       return CameraParameters::KEY_EXPOSURE_COMPENSATION;
+    case CAMERA_PARAM_THUMBNAILWIDTH:
+      return CameraParameters::KEY_JPEG_THUMBNAIL_WIDTH;
+    case CAMERA_PARAM_THUMBNAILHEIGHT:
+      return CameraParameters::KEY_JPEG_THUMBNAIL_HEIGHT;
+    case CAMERA_PARAM_THUMBNAILQUALITY:
+      return CameraParameters::KEY_JPEG_THUMBNAIL_QUALITY;
+
     case CAMERA_PARAM_SUPPORTED_PREVIEWSIZES:
       return CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES;
     case CAMERA_PARAM_SUPPORTED_VIDEOSIZES:
@@ -104,6 +112,8 @@ static const char* getKeyText(uint32_t aKey)
       return CameraParameters::KEY_ZOOM_SUPPORTED;
     case CAMERA_PARAM_SUPPORTED_ZOOMRATIOS:
       return CameraParameters::KEY_ZOOM_RATIOS;
+    case CAMERA_PARAM_SUPPORTED_JPEG_THUMBNAIL_SIZES:
+      return CameraParameters::KEY_SUPPORTED_JPEG_THUMBNAIL_SIZES;
     default:
       return nullptr;
   }
@@ -174,6 +184,8 @@ nsGonkCameraControl::nsGonkCameraControl(uint32_t aCameraId, nsIThread* aCameraT
   , mDeferConfigUpdate(false)
   , mWidth(0)
   , mHeight(0)
+  , mLastPictureWidth(0)
+  , mLastPictureHeight(0)
   , mFormat(PREVIEW_FORMAT_UNKNOWN)
   , mFps(30)
   , mDiscardedFrameCount(0)
@@ -208,6 +220,7 @@ nsGonkCameraControl::Init()
   const char* const BAD_PREVIEW_FORMAT = "yuv420sp";
   mParams.setPreviewFormat(PREVIEW_FORMAT);
   mParams.setPreviewFrameRate(mFps);
+  PushParametersImpl();
 
   // Check that our settings stuck
   PullParametersImpl();
@@ -402,14 +415,50 @@ nsGonkCameraControl::GetParameter(uint32_t aKey, nsTArray<CameraRegion>& aRegion
     r = aRegions.AppendElement();
     if (sscanf(p, "(%d,%d,%d,%d,%u)", &r->top, &r->left, &r->bottom, &r->right, &r->weight) != 5) {
       DOM_CAMERA_LOGE("%s:%d : region tuple has bad format: '%s'\n", __func__, __LINE__, p);
-      goto GetParameter_error;
+      aRegions.Clear();
+      return;
     }
   }
 
   return;
+}
 
-GetParameter_error:
-  aRegions.Clear();
+void
+nsGonkCameraControl::GetParameter(uint32_t aKey, nsTArray<CameraSize>& aSizes)
+{
+  const char* key = getKeyText(aKey);
+  if (!key) {
+    return;
+  }
+
+  RwAutoLockRead lock(mRwLock);
+
+  const char* value = mParams.get(key);
+  DOM_CAMERA_LOGI("key='%s' --> value='%s'\n", key, value);
+  if (!value) {
+    return;
+  }
+
+  const char* p = value;
+  CameraSize* s;
+
+  // The 'value' string is in the format "w1xh1,w2xh2,w3xh3,..."
+  while (p) {
+    s = aSizes.AppendElement();
+    if (sscanf(p, "%dx%d", &s->width, &s->height) != 2) {
+      DOM_CAMERA_LOGE("%s:%d : size tuple has bad format: '%s'\n", __func__, __LINE__, p);
+      aSizes.Clear();
+      return;
+    }
+    // Look for the next record...
+    p = strchr(p, ',');
+    if (p) {
+      // ...skip the comma too
+      ++p;
+    }
+  }
+
+  return;
 }
 
 nsresult
@@ -524,6 +573,20 @@ nsGonkCameraControl::SetParameter(uint32_t aKey, const nsTArray<CameraRegion>& a
   PushParameters();
 }
 
+void
+nsGonkCameraControl::SetParameter(uint32_t aKey, int aValue)
+{
+  const char* key = getKeyText(aKey);
+  if (!key) {
+    return;
+  }
+  {
+    RwAutoLockWrite lock(mRwLock);
+    mParams.set(key, aValue);
+  }
+  PushParameters();
+}
+
 nsresult
 nsGonkCameraControl::GetPreviewStreamImpl(GetPreviewStreamTask* aGetPreviewStream)
 {
@@ -615,6 +678,45 @@ nsGonkCameraControl::AutoFocusImpl(AutoFocusTask* aAutoFocus)
   return NS_OK;
 }
 
+void
+nsGonkCameraControl::SetupThumbnail(uint32_t aPictureWidth, uint32_t aPictureHeight, uint32_t aPercentQuality)
+{
+  /**
+   * Use the smallest non-0x0 thumbnail size that matches
+   *  the aspect ratio of our parameters...
+   */
+  uint32_t smallestArea = UINT_MAX;
+  uint32_t smallestIndex = UINT_MAX;
+  nsAutoTArray<CameraSize, 8> thumbnailSizes;
+  GetParameter(CAMERA_PARAM_SUPPORTED_JPEG_THUMBNAIL_SIZES, thumbnailSizes);
+
+  for (uint32_t i = 0; i < thumbnailSizes.Length(); ++i) {
+    uint32_t area = thumbnailSizes[i].width * thumbnailSizes[i].height;
+    if (area != 0
+      && area < smallestArea
+      && thumbnailSizes[i].width * aPictureHeight / thumbnailSizes[i].height == aPictureWidth
+    ) {
+      smallestArea = area;
+      smallestIndex = i;
+    }
+  }
+
+  aPercentQuality = clamped<uint32_t>(aPercentQuality, 1, 100);
+  SetParameter(CAMERA_PARAM_THUMBNAILQUALITY, static_cast<int>(aPercentQuality));
+
+  if (smallestIndex != UINT_MAX) {
+    uint32_t w = thumbnailSizes[smallestIndex].width;
+    uint32_t h = thumbnailSizes[smallestIndex].height;
+    DOM_CAMERA_LOGI("Using thumbnail size: %ux%u, quality: %u %%\n", w, h, aPercentQuality);
+    if (w > INT_MAX || h > INT_MAX) {
+      DOM_CAMERA_LOGE("Thumbnail dimension is too big, will use defaults\n");
+      return;
+    }
+    SetParameter(CAMERA_PARAM_THUMBNAILWIDTH, static_cast<int>(w));
+    SetParameter(CAMERA_PARAM_THUMBNAILHEIGHT, static_cast<int>(h));
+  }
+}
+
 nsresult
 nsGonkCameraControl::TakePictureImpl(TakePictureTask* aTakePicture)
 {
@@ -641,16 +743,24 @@ nsGonkCameraControl::TakePictureImpl(TakePictureTask* aTakePicture)
   // batch-update camera configuration
   mDeferConfigUpdate = true;
 
-  /**
-   * height and width: some drivers are less friendly about getting one of
-   * these set to zero, so if either is not specified, ignore both and go
-   * with current or default settings.
-   */
-  if (aTakePicture->mSize.width && aTakePicture->mSize.height) {
-    nsCString s;
-    s.AppendPrintf("%dx%d", aTakePicture->mSize.width, aTakePicture->mSize.height);
-    DOM_CAMERA_LOGI("setting picture size to '%s'\n", s.get());
-    SetParameter(CameraParameters::KEY_PICTURE_SIZE, s.get());
+  if (aTakePicture->mSize.width != mLastPictureWidth || aTakePicture->mSize.height != mLastPictureHeight) {
+    /**
+     * height and width: some drivers are less friendly about getting one of
+     * these set to zero, so if either is not specified, ignore both and go
+     * with current or default settings.
+     */
+    if (aTakePicture->mSize.width && aTakePicture->mSize.height) {
+      nsCString s;
+      s.AppendPrintf("%ux%u", aTakePicture->mSize.width, aTakePicture->mSize.height);
+      DOM_CAMERA_LOGI("setting picture size to '%s'\n", s.get());
+      SetParameter(CameraParameters::KEY_PICTURE_SIZE, s.get());
+
+      // Choose an appropriate thumbnail size and quality (from 1..100)
+      SetupThumbnail(aTakePicture->mSize.width, aTakePicture->mSize.height, 60);
+    }
+
+    mLastPictureWidth = aTakePicture->mSize.width;
+    mLastPictureHeight = aTakePicture->mSize.height;
   }
 
   // Picture format -- need to keep it for the callback.

dom/camera/GonkCameraControl.h

@@ -47,10 +47,12 @@ public:
   const char* GetParameterConstChar(uint32_t aKey);
   double GetParameterDouble(uint32_t aKey);
   void GetParameter(uint32_t aKey, nsTArray<dom::CameraRegion>& aRegions);
+  void GetParameter(uint32_t aKey, nsTArray<CameraSize>& aSizes);
   void SetParameter(const char* aKey, const char* aValue);
   void SetParameter(uint32_t aKey, const char* aValue);
   void SetParameter(uint32_t aKey, double aValue);
   void SetParameter(uint32_t aKey, const nsTArray<dom::CameraRegion>& aRegions);
+  void SetParameter(uint32_t aKey, int aValue);
   nsresult GetVideoSizes(nsTArray<CameraSize>& aVideoSizes);
   nsresult PushParameters();
 
@@ -79,6 +81,7 @@ protected:
   already_AddRefed<GonkRecorderProfileManager> GetGonkRecorderProfileManager();
 
   void SetPreviewSize(uint32_t aWidth, uint32_t aHeight);
+  void SetupThumbnail(uint32_t aPictureWidth, uint32_t aPictureHeight, uint32_t aPercentQuality);
 
   uint32_t                  mHwHandle;
   double                    mExposureCompensationMin;
@@ -88,6 +91,8 @@ protected:
   android::CameraParameters mParams;
   uint32_t                  mWidth;
   uint32_t                  mHeight;
+  uint32_t                  mLastPictureWidth;
+  uint32_t                  mLastPictureHeight;
 
   enum {
     PREVIEW_FORMAT_UNKNOWN,