am 346b6126: am 97a56269: Merge "Add camera fps range API." into gingerbread
Merge commit '346b6126d54bda4ddc705b27f49004b5cf3a2b3e'
* commit '346b6126d54bda4ddc705b27f49004b5cf3a2b3e':
Add camera fps range API.
diff --git a/core/java/android/hardware/Camera.java b/core/java/android/hardware/Camera.java
index a0abc6c..e432a47 100644
--- a/core/java/android/hardware/Camera.java
+++ b/core/java/android/hardware/Camera.java
@@ -960,6 +960,7 @@
private static final String KEY_PREVIEW_SIZE = "preview-size";
private static final String KEY_PREVIEW_FORMAT = "preview-format";
private static final String KEY_PREVIEW_FRAME_RATE = "preview-frame-rate";
+ private static final String KEY_PREVIEW_FPS_RANGE = "preview-fps-range";
private static final String KEY_PICTURE_SIZE = "picture-size";
private static final String KEY_PICTURE_FORMAT = "picture-format";
private static final String KEY_JPEG_THUMBNAIL_SIZE = "jpeg-thumbnail-size";
@@ -1219,6 +1220,22 @@
*/
public static final String METERING_MODE_SPOT = "spot";
+ /**
+ * The array index of minimum preview fps for use with {@link
+ * #getPreviewFpsRange(int[])} or {@link
+ * #getSupportedPreviewFpsRange()}.
+ * @hide
+ */
+ public static final int PREVIEW_FPS_MIN_INDEX = 0;
+
+ /**
+ * The array index of maximum preview fps for use with {@link
+ * #getPreviewFpsRange(int[])} or {@link
+ * #getSupportedPreviewFpsRange()}.
+ * @hide
+ */
+ public static final int PREVIEW_FPS_MAX_INDEX = 1;
+
// Formats for setPreviewFormat and setPictureFormat.
private static final String PIXEL_FORMAT_YUV422SP = "yuv422sp";
private static final String PIXEL_FORMAT_YUV420SP = "yuv420sp";
@@ -1482,6 +1499,64 @@
}
/**
+ * Sets the maximum and maximum preview fps. This controls the rate of
+ * preview frames received in {@link #PreviewCallback}. The minimum and
+ * maximum preview fps must be one of the elements from {@link
+ * #getSupportedPreviewFpsRange}.
+ *
+ * @param min the minimum preview fps (scaled by 1000).
+ * @param max the maximum preview fps (scaled by 1000).
+ * @throws RuntimeException if fps range is invalid.
+ * @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback)
+ * @see #getSupportedPreviewFpsRange()
+ * @hide
+ */
+ public void setPreviewFpsRange(int min, int max) {
+ set(KEY_PREVIEW_FPS_RANGE, "" + min + "," + max);
+ }
+
+ /**
+ * Returns the current minimum and maximum preview fps. The values are
+ * one of the elements returned by {@link #getSupportedPreviewFpsRange}.
+ *
+ * @return range the minimum and maximum preview fps (scaled by 1000).
+ * @see #PREVIEW_FPS_MIN_INDEX
+ * @see #PREVIEW_FPS_MAX_INDEX
+ * @see #getSupportedPreviewFpsRange()
+ * @hide
+ */
+ public void getPreviewFpsRange(int[] range) {
+ if (range == null || range.length != 2) {
+ throw new IllegalArgumentException(
+ "range must be an float array with two elements.");
+ }
+ splitInt(get(KEY_PREVIEW_FPS_RANGE), range);
+ }
+
+ /**
+ * Gets the supported preview fps (frame-per-second) ranges. Each range
+ * contains a minimum fps and maximum fps. If minimum fps equals to
+ * maximum fps, the camera outputs frames in fixed frame rate. If not,
+ * the camera outputs frames in auto frame rate. The actual frame rate
+ * fluctuates between the minimum and the maximum. The values are
+ * multiplied by 1000 and represented in integers. For example, if frame
+ * rate is 26.623 frames per second, the value is 26623.
+ *
+ * @return a list of supported preview fps ranges. This method returns a
+ * list with at least one element. Every element is an int array
+ * of two values - minimum fps and maximum fps. The list is
+ * sorted from small to large (first by maximum fps and then
+ * minimum fps).
+ * @see #PREVIEW_FPS_MIN_INDEX
+ * @see #PREVIEW_FPS_MAX_INDEX
+ * @hide
+ */
+ public List<int[]> getSupportedPreviewFpsRange() {
+ String str = get(KEY_PREVIEW_FPS_RANGE + SUPPORTED_VALUES_SUFFIX);
+ return splitRange(str);
+ }
+
+ /**
* Sets the image format for preview pictures.
* <p>If this is never called, the default format will be
* {@link android.graphics.ImageFormat#NV21}, which
@@ -2184,10 +2259,7 @@
throw new IllegalArgumentException(
"output must be an float array with three elements.");
}
- List<Float> distances = splitFloat(get(KEY_FOCUS_DISTANCES));
- output[0] = distances.get(0);
- output[1] = distances.get(1);
- output[2] = distances.get(2);
+ splitFloat(get(KEY_FOCUS_DISTANCES), output);
}
/**
@@ -2255,19 +2327,27 @@
return substrings;
}
- // Splits a comma delimited string to an ArrayList of Float.
- // Return null if the passing string is null or the size is 0.
- private ArrayList<Float> splitFloat(String str) {
- if (str == null) return null;
+ private void splitInt(String str, int[] output) {
+ if (str == null) return;
StringTokenizer tokenizer = new StringTokenizer(str, ",");
- ArrayList<Float> substrings = new ArrayList<Float>();
+ int index = 0;
while (tokenizer.hasMoreElements()) {
String token = tokenizer.nextToken();
- substrings.add(Float.parseFloat(token));
+ output[index++] = Integer.parseInt(token);
}
- if (substrings.size() == 0) return null;
- return substrings;
+ }
+
+ // Splits a comma delimited string to an ArrayList of Float.
+ private void splitFloat(String str, float[] output) {
+ if (str == null) return;
+
+ StringTokenizer tokenizer = new StringTokenizer(str, ",");
+ int index = 0;
+ while (tokenizer.hasMoreElements()) {
+ String token = tokenizer.nextToken();
+ output[index++] = Float.parseFloat(token);
+ }
}
// Returns the value of a float parameter.
@@ -2318,5 +2398,30 @@
Log.e(TAG, "Invalid size parameter string=" + str);
return null;
}
+
+ // Splits a comma delimited string to an ArrayList of int array.
+ // Example string: "(10000,26623),(10000,30000)". Return null if the
+ // passing string is null or the size is 0.
+ private ArrayList<int[]> splitRange(String str) {
+ if (str == null || str.charAt(0) != '('
+ || str.charAt(str.length() - 1) != ')') {
+ Log.e(TAG, "Invalid range list string=" + str);
+ return null;
+ }
+
+ ArrayList<int[]> rangeList = new ArrayList<int[]>();
+ int endIndex, fromIndex = 1;
+ do {
+ int[] range = new int[2];
+ endIndex = str.indexOf("),(", fromIndex);
+ if (endIndex == -1) endIndex = str.length() - 1;
+ splitInt(str.substring(fromIndex, endIndex), range);
+ rangeList.add(range);
+ fromIndex = endIndex + 3;
+ } while (endIndex != str.length() - 1);
+
+ if (rangeList.size() == 0) return null;
+ return rangeList;
+ }
};
}
diff --git a/include/camera/CameraParameters.h b/include/camera/CameraParameters.h
index 4bc1799..a5c7874 100644
--- a/include/camera/CameraParameters.h
+++ b/include/camera/CameraParameters.h
@@ -61,6 +61,7 @@
void getSupportedPreviewSizes(Vector<Size> &sizes) const;
void setPreviewFrameRate(int fps);
int getPreviewFrameRate() const;
+ void getPreviewFpsRange(int *min_fps, int *max_fps) const;
void setPreviewFormat(const char *format);
const char *getPreviewFormat() const;
void setPictureSize(int width, int height);
@@ -82,6 +83,20 @@
// Supported preview frame sizes in pixels.
// Example value: "800x600,480x320". Read only.
static const char KEY_SUPPORTED_PREVIEW_SIZES[];
+ // The current minimum and maximum preview fps. This controls the rate of
+ // preview frames received (CAMERA_MSG_PREVIEW_FRAME). The minimum and
+ // maximum fps must be one of the elements from
+ // KEY_SUPPORTED_PREVIEW_FPS_RANGE parameter.
+ // Example value: "10500,26623"
+ static const char KEY_PREVIEW_FPS_RANGE[];
+ // The supported preview fps (frame-per-second) ranges. Each range contains
+ // a minimum fps and maximum fps. If minimum fps equals to maximum fps, the
+ // camera outputs frames in fixed frame rate. If not, the camera outputs
+ // frames in auto frame rate. The actual frame rate fluctuates between the
+ // minimum and the maximum. The list has at least one element. The list is
+ // sorted from small to large (first by maximum fps and then minimum fps).
+ // Example value: "(10500,26623),(15000,26623),(30000,30000)"
+ static const char KEY_SUPPORTED_PREVIEW_FPS_RANGE[];
// The image format for preview frames. See CAMERA_MSG_PREVIEW_FRAME in
// frameworks/base/include/camera/Camera.h.
// Example value: "yuv420sp" or PIXEL_FORMAT_XXX constants. Read/write.
diff --git a/libs/camera/CameraParameters.cpp b/libs/camera/CameraParameters.cpp
index abd418a..d0ed7df 100644
--- a/libs/camera/CameraParameters.cpp
+++ b/libs/camera/CameraParameters.cpp
@@ -30,6 +30,8 @@
const char CameraParameters::KEY_SUPPORTED_PREVIEW_FORMATS[] = "preview-format-values";
const char CameraParameters::KEY_PREVIEW_FRAME_RATE[] = "preview-frame-rate";
const char CameraParameters::KEY_SUPPORTED_PREVIEW_FRAME_RATES[] = "preview-frame-rate-values";
+const char CameraParameters::KEY_PREVIEW_FPS_RANGE[] = "preview-fps-range";
+const char CameraParameters::KEY_SUPPORTED_PREVIEW_FPS_RANGE[] = "preview-fps-range-values";
const char CameraParameters::KEY_PICTURE_SIZE[] = "picture-size";
const char CameraParameters::KEY_SUPPORTED_PICTURE_SIZES[] = "picture-size-values";
const char CameraParameters::KEY_PICTURE_FORMAT[] = "picture-format";
@@ -269,20 +271,24 @@
mMap.removeItem(String8(key));
}
-static int parse_size(const char *str, int &width, int &height, char **endptr = NULL)
+// Parse string like "640x480" or "10000,20000"
+static int parse_pair(const char *str, int *first, int *second, char delim,
+ char **endptr = NULL)
{
- // Find the width.
+ // Find the first integer.
char *end;
int w = (int)strtol(str, &end, 10);
- // If an 'x' does not immediately follow, give up.
- if (*end != 'x')
+ // If a delimeter does not immediately follow, give up.
+ if (*end != delim) {
+ LOGE("Cannot find delimeter (%c) in str=%s", delim, str);
return -1;
+ }
- // Find the height, immediately after the 'x'.
+ // Find the second integer, immediately after the delimeter.
int h = (int)strtol(end+1, &end, 10);
- width = w;
- height = h;
+ *first = w;
+ *second = h;
if (endptr) {
*endptr = end;
@@ -301,7 +307,8 @@
while (true) {
int width, height;
- int success = parse_size(sizeStartPtr, width, height, &sizeStartPtr);
+ int success = parse_pair(sizeStartPtr, &width, &height, 'x',
+ &sizeStartPtr);
if (success == -1 || (*sizeStartPtr != ',' && *sizeStartPtr != '\0')) {
LOGE("Picture sizes string \"%s\" contains invalid character.", sizesStr);
return;
@@ -324,19 +331,11 @@
void CameraParameters::getPreviewSize(int *width, int *height) const
{
- *width = -1;
- *height = -1;
-
+ *width = *height = -1;
// Get the current string, if it doesn't exist, leave the -1x-1
const char *p = get(KEY_PREVIEW_SIZE);
- if (p == 0)
- return;
-
- int w, h;
- if (parse_size(p, w, h) == 0) {
- *width = w;
- *height = h;
- }
+ if (p == 0) return;
+ parse_pair(p, width, height, 'x');
}
void CameraParameters::getSupportedPreviewSizes(Vector<Size> &sizes) const
@@ -355,6 +354,14 @@
return getInt(KEY_PREVIEW_FRAME_RATE);
}
+void CameraParameters::getPreviewFpsRange(int *min_fps, int *max_fps) const
+{
+ *min_fps = *max_fps = -1;
+ const char *p = get(KEY_PREVIEW_FPS_RANGE);
+ if (p == 0) return;
+ parse_pair(p, min_fps, max_fps, ',');
+}
+
void CameraParameters::setPreviewFormat(const char *format)
{
set(KEY_PREVIEW_FORMAT, format);
@@ -374,19 +381,11 @@
void CameraParameters::getPictureSize(int *width, int *height) const
{
- *width = -1;
- *height = -1;
-
+ *width = *height = -1;
// Get the current string, if it doesn't exist, leave the -1x-1
const char *p = get(KEY_PICTURE_SIZE);
- if (p == 0)
- return;
-
- int w, h;
- if (parse_size(p, w, h) == 0) {
- *width = w;
- *height = h;
- }
+ if (p == 0) return;
+ parse_pair(p, width, height, 'x');
}
void CameraParameters::getSupportedPictureSizes(Vector<Size> &sizes) const