libs/camera/CameraParameters.cpp

/*
**
** Copyright 2008, 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 "CameraParams"
#include <utils/Log.h>

#include <string.h>
#include <stdlib.h>
#include <camera/CameraParameters.h>

namespace android {
// Parameter keys to communicate between camera application and driver.
const char CameraParameters::KEY_PREVIEW_SIZE[] = "preview-size";
const char CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES[] = "preview-size-values";
const char CameraParameters::KEY_PREVIEW_FORMAT[] = "preview-format";
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_PICTURE_SIZE[] = "picture-size";
const char CameraParameters::KEY_SUPPORTED_PICTURE_SIZES[] = "picture-size-values";
const char CameraParameters::KEY_PICTURE_FORMAT[] = "picture-format";
const char CameraParameters::KEY_SUPPORTED_PICTURE_FORMATS[] = "picture-format-values";
const char CameraParameters::KEY_JPEG_THUMBNAIL_WIDTH[] = "jpeg-thumbnail-width";
const char CameraParameters::KEY_JPEG_THUMBNAIL_HEIGHT[] = "jpeg-thumbnail-height";
const char CameraParameters::KEY_SUPPORTED_JPEG_THUMBNAIL_SIZES[] = "jpeg-thumbnail-size-values";
const char CameraParameters::KEY_JPEG_THUMBNAIL_QUALITY[] = "jpeg-thumbnail-quality";
const char CameraParameters::KEY_JPEG_QUALITY[] = "jpeg-quality";
const char CameraParameters::KEY_ROTATION[] = "rotation";
const char CameraParameters::KEY_GPS_LATITUDE[] = "gps-latitude";
const char CameraParameters::KEY_GPS_LONGITUDE[] = "gps-longitude";
const char CameraParameters::KEY_GPS_ALTITUDE[] = "gps-altitude";
const char CameraParameters::KEY_GPS_TIMESTAMP[] = "gps-timestamp";
const char CameraParameters::KEY_WHITE_BALANCE[] = "whitebalance";
const char CameraParameters::KEY_SUPPORTED_WHITE_BALANCE[] = "whitebalance-values";
const char CameraParameters::KEY_EFFECT[] = "effect";
const char CameraParameters::KEY_SUPPORTED_EFFECTS[] = "effect-values";
const char CameraParameters::KEY_ANTIBANDING[] = "antibanding";
const char CameraParameters::KEY_SUPPORTED_ANTIBANDING[] = "antibanding-values";
const char CameraParameters::KEY_SCENE_MODE[] = "scene-mode";
const char CameraParameters::KEY_SUPPORTED_SCENE_MODES[] = "scene-mode-values";
const char CameraParameters::KEY_FLASH_MODE[] = "flash-mode";
const char CameraParameters::KEY_SUPPORTED_FLASH_MODES[] = "flash-mode-values";
const char CameraParameters::KEY_FOCUS_MODE[] = "focus-mode";
const char CameraParameters::KEY_SUPPORTED_FOCUS_MODES[] = "focus-mode-values";
const char CameraParameters::KEY_FOCAL_LENGTH[] = "focal-length";
const char CameraParameters::KEY_HORIZONTAL_VIEW_ANGLE[] = "horizontal-view-angle";
const char CameraParameters::KEY_VERTICAL_VIEW_ANGLE[] = "vertical-view-angle";
const char CameraParameters::KEY_EXPOSURE_COMPENSATION[] = "exposure-compensation";
const char CameraParameters::KEY_MAX_EXPOSURE_COMPENSATION[] = "max-exposure-compensation";
const char CameraParameters::KEY_MIN_EXPOSURE_COMPENSATION[] = "min-exposure-compensation";
const char CameraParameters::KEY_EXPOSURE_COMPENSATION_STEP[] = "exposure-compensation-step";

// Values for white balance settings.
const char CameraParameters::WHITE_BALANCE_AUTO[] = "auto";
const char CameraParameters::WHITE_BALANCE_INCANDESCENT[] = "incandescent";
const char CameraParameters::WHITE_BALANCE_FLUORESCENT[] = "fluorescent";
const char CameraParameters::WHITE_BALANCE_WARM_FLUORESCENT[] = "warm-fluorescent";
const char CameraParameters::WHITE_BALANCE_DAYLIGHT[] = "daylight";
const char CameraParameters::WHITE_BALANCE_CLOUDY_DAYLIGHT[] = "cloudy-daylight";
const char CameraParameters::WHITE_BALANCE_TWILIGHT[] = "twilight";
const char CameraParameters::WHITE_BALANCE_SHADE[] = "shade";

// Values for effect settings.
const char CameraParameters::EFFECT_NONE[] = "none";
const char CameraParameters::EFFECT_MONO[] = "mono";
const char CameraParameters::EFFECT_NEGATIVE[] = "negative";
const char CameraParameters::EFFECT_SOLARIZE[] = "solarize";
const char CameraParameters::EFFECT_SEPIA[] = "sepia";
const char CameraParameters::EFFECT_POSTERIZE[] = "posterize";
const char CameraParameters::EFFECT_WHITEBOARD[] = "whiteboard";
const char CameraParameters::EFFECT_BLACKBOARD[] = "blackboard";
const char CameraParameters::EFFECT_AQUA[] = "aqua";

// Values for antibanding settings.
const char CameraParameters::ANTIBANDING_AUTO[] = "auto";
const char CameraParameters::ANTIBANDING_50HZ[] = "50hz";
const char CameraParameters::ANTIBANDING_60HZ[] = "60hz";
const char CameraParameters::ANTIBANDING_OFF[] = "off";

// Values for flash mode settings.
const char CameraParameters::FLASH_MODE_OFF[] = "off";
const char CameraParameters::FLASH_MODE_AUTO[] = "auto";
const char CameraParameters::FLASH_MODE_ON[] = "on";
const char CameraParameters::FLASH_MODE_RED_EYE[] = "red-eye";
const char CameraParameters::FLASH_MODE_TORCH[] = "torch";

// Values for scene mode settings.
const char CameraParameters::SCENE_MODE_AUTO[] = "auto";
const char CameraParameters::SCENE_MODE_ACTION[] = "action";
const char CameraParameters::SCENE_MODE_PORTRAIT[] = "portrait";
const char CameraParameters::SCENE_MODE_LANDSCAPE[] = "landscape";
const char CameraParameters::SCENE_MODE_NIGHT[] = "night";
const char CameraParameters::SCENE_MODE_NIGHT_PORTRAIT[] = "night-portrait";
const char CameraParameters::SCENE_MODE_THEATRE[] = "theatre";
const char CameraParameters::SCENE_MODE_BEACH[] = "beach";
const char CameraParameters::SCENE_MODE_SNOW[] = "snow";
const char CameraParameters::SCENE_MODE_SUNSET[] = "sunset";
const char CameraParameters::SCENE_MODE_STEADYPHOTO[] = "steadyphoto";
const char CameraParameters::SCENE_MODE_FIREWORKS[] = "fireworks";
const char CameraParameters::SCENE_MODE_SPORTS[] = "sports";
const char CameraParameters::SCENE_MODE_PARTY[] = "party";
const char CameraParameters::SCENE_MODE_CANDLELIGHT[] = "candlelight";

// Formats for setPreviewFormat and setPictureFormat.
const char CameraParameters::PIXEL_FORMAT_YUV422SP[] = "yuv422sp";
const char CameraParameters::PIXEL_FORMAT_YUV420SP[] = "yuv420sp";
const char CameraParameters::PIXEL_FORMAT_YUV422I[] = "yuv422i-yuyv";
const char CameraParameters::PIXEL_FORMAT_RGB565[] = "rgb565";
const char CameraParameters::PIXEL_FORMAT_JPEG[] = "jpeg";

// Values for focus mode settings.
const char CameraParameters::FOCUS_MODE_AUTO[] = "auto";
const char CameraParameters::FOCUS_MODE_INFINITY[] = "infinity";
const char CameraParameters::FOCUS_MODE_MACRO[] = "macro";
const char CameraParameters::FOCUS_MODE_FIXED[] = "fixed";

CameraParameters::CameraParameters()
                : mMap()
{
}

CameraParameters::~CameraParameters()
{
}

String8 CameraParameters::flatten() const
{
    String8 flattened("");
    size_t size = mMap.size();

    for (size_t i = 0; i < size; i++) {
        String8 k, v;
        k = mMap.keyAt(i);
        v = mMap.valueAt(i);

        flattened += k;
        flattened += "=";
        flattened += v;
        if (i != size-1)
            flattened += ";";
    }

    return flattened;
}

void CameraParameters::unflatten(const String8 &params)
{
    const char *a = params.string();
    const char *b;

    mMap.clear();

    for (;;) {
        // Find the bounds of the key name.
        b = strchr(a, '=');
        if (b == 0)
            break;

        // Create the key string.
        String8 k(a, (size_t)(b-a));

        // Find the value.
        a = b+1;
        b = strchr(a, ';');
        if (b == 0) {
            // If there's no semicolon, this is the last item.
            String8 v(a);
            mMap.add(k, v);
            break;
        }

        String8 v(a, (size_t)(b-a));
        mMap.add(k, v);
        a = b+1;
    }
}


void CameraParameters::set(const char *key, const char *value)
{
    // XXX i think i can do this with strspn()
    if (strchr(key, '=') || strchr(key, ';')) {
        //XXX LOGE("Key \"%s\"contains invalid character (= or ;)", key);
        return;
    }

    if (strchr(value, '=') || strchr(key, ';')) {
        //XXX LOGE("Value \"%s\"contains invalid character (= or ;)", value);
        return;
    }

    mMap.replaceValueFor(String8(key), String8(value));
}

void CameraParameters::set(const char *key, int value)
{
    char str[16];
    sprintf(str, "%d", value);
    set(key, str);
}

void CameraParameters::setFloat(const char *key, float value)
{
    char str[16];  // 14 should be enough. We overestimate to be safe.
    snprintf(str, sizeof(str), "%g", value);
    set(key, str);
}

const char *CameraParameters::get(const char *key) const
{
    String8 v = mMap.valueFor(String8(key));
    if (v.length() == 0)
        return 0;
    return v.string();
}

int CameraParameters::getInt(const char *key) const
{
    const char *v = get(key);
    if (v == 0)
        return -1;
    return strtol(v, 0, 0);
}

float CameraParameters::getFloat(const char *key) const
{
    const char *v = get(key);
    if (v == 0) return -1;
    return strtof(v, 0);
}

static int parse_size(const char *str, int &width, int &height)
{
    // Find the width.
    char *end;
    int w = (int)strtol(str, &end, 10);
    // If an 'x' does not immediately follow, give up.
    if (*end != 'x')
        return -1;

    // Find the height, immediately after the 'x'.
    int h = (int)strtol(end+1, 0, 10);

    width = w;
    height = h;

    return 0;
}

void CameraParameters::setPreviewSize(int width, int height)
{
    char str[32];
    sprintf(str, "%dx%d", width, height);
    set(KEY_PREVIEW_SIZE, str);
}

void CameraParameters::getPreviewSize(int *width, int *height) const
{
    *width = -1;
    *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;
    }
}

void CameraParameters::setPreviewFrameRate(int fps)
{
    set(KEY_PREVIEW_FRAME_RATE, fps);
}

int CameraParameters::getPreviewFrameRate() const
{
    return getInt(KEY_PREVIEW_FRAME_RATE);
}

void CameraParameters::setPreviewFormat(const char *format)
{
    set(KEY_PREVIEW_FORMAT, format);
}

const char *CameraParameters::getPreviewFormat() const
{
    return get(KEY_PREVIEW_FORMAT);
}

void CameraParameters::setPictureSize(int width, int height)
{
    char str[32];
    sprintf(str, "%dx%d", width, height);
    set(KEY_PICTURE_SIZE, str);
}

void CameraParameters::getPictureSize(int *width, int *height) const
{
    *width = -1;
    *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;
    }
}

void CameraParameters::setPictureFormat(const char *format)
{
    set(KEY_PICTURE_FORMAT, format);
}

const char *CameraParameters::getPictureFormat() const
{
    return get(KEY_PICTURE_FORMAT);
}

void CameraParameters::dump() const
{
    LOGD("dump: mMap.size = %d", mMap.size());
    for (size_t i = 0; i < mMap.size(); i++) {
        String8 k, v;
        k = mMap.keyAt(i);
        v = mMap.valueAt(i);
        LOGD("%s: %s\n", k.string(), v.string());
    }
}

status_t CameraParameters::dump(int fd, const Vector<String16>& args) const
{
    const size_t SIZE = 256;
    char buffer[SIZE];
    String8 result;
    snprintf(buffer, 255, "CameraParameters::dump: mMap.size = %d\n", mMap.size());
    result.append(buffer);
    for (size_t i = 0; i < mMap.size(); i++) {
        String8 k, v;
        k = mMap.keyAt(i);
        v = mMap.valueAt(i);
        snprintf(buffer, 255, "\t%s: %s\n", k.string(), v.string());
        result.append(buffer);
    }
    write(fd, result.string(), result.size());
    return NO_ERROR;
}

}; // namespace android