Telegram-Android/TMessagesProj/jni/lottie.cpp

#include <jni.h>
#include <android/bitmap.h>
#include <cstring>
#include <rlottie.h>
#include <unistd.h>
#include <condition_variable>
#include <atomic>
#include <thread>
#include <map>
#include <sys/stat.h>
#include <utime.h>
#include "tgnet/FileLog.h"
#include "tgnet/ConnectionsManager.h"
#include "c_utils.h"

extern "C" {
using namespace rlottie;

typedef struct LottieInfo {

    ~LottieInfo() {
        if (decompressBuffer != nullptr) {
            delete[]decompressBuffer;
            decompressBuffer = nullptr;
        }
    }

    std::unique_ptr<Animation> animation;
    size_t frameCount = 0;
    int32_t fps = 30;
    bool precache = false;
    bool createCache = false;
    bool limitFps = false;
    std::string path;
    std::string cacheFile;
    uint8_t *decompressBuffer = nullptr;
    uint32_t decompressBufferSize = 0;
    volatile uint32_t maxFrameSize = 0;
    uint32_t imageSize = 0;
    uint32_t fileOffset = 0;
    uint32_t fileFrame = 0;
    bool nextFrameIsCacheFrame = false;

    char *compressBuffer = nullptr;
    const char *buffer = nullptr;
    bool firstFrame = false;
    int bufferSize = 0;
    int compressBound = 0;
    int firstFrameSize = 0;
    volatile uint32_t framesAvailableInCache = 0;
};

JNIEXPORT jlong Java_org_telegram_ui_Components_RLottieDrawable_create(JNIEnv *env, jclass clazz, jstring src, jstring json, jint w, jint h, jintArray data, jboolean precache, jintArray colorReplacement, jboolean limitFps, jint fitzModifier) {
    auto info = new LottieInfo();

    std::map<int32_t, int32_t> *colors = nullptr;
    int color = 0;
    if (colorReplacement != nullptr) {
        jint *arr = env->GetIntArrayElements(colorReplacement, nullptr);
        if (arr != nullptr) {
            jsize len = env->GetArrayLength(colorReplacement);
            colors = new std::map<int32_t, int32_t>();
            for (int32_t a = 0; a < len / 2; a++) {
                (*colors)[arr[a * 2]] = arr[a * 2 + 1];
                if (color == 0) {
                    color = arr[a * 2 + 1];
                }
            }
            env->ReleaseIntArrayElements(colorReplacement, arr, 0);
        }
    }


    FitzModifier modifier = FitzModifier::None;
    switch (fitzModifier) {
        case 12:
            modifier = FitzModifier::Type12;
            break;
        case 3:
            modifier = FitzModifier::Type3;
            break;
        case 4:
            modifier = FitzModifier::Type4;
            break;
        case 5:
            modifier = FitzModifier::Type5;
            break;
        case 6:
            modifier = FitzModifier::Type6;
            break;
    }
    char const *srcString = env->GetStringUTFChars(src, nullptr);
    info->path = srcString;
    if (json != nullptr) {
        char const *jsonString = env->GetStringUTFChars(json, nullptr);
        if (jsonString) {
            info->animation = rlottie::Animation::loadFromData(jsonString, info->path, colors, modifier);
            env->ReleaseStringUTFChars(json, jsonString);
        }
    } else {
        info->animation = rlottie::Animation::loadFromFile(info->path, colors, modifier);
    }
    if (srcString) {
        env->ReleaseStringUTFChars(src, srcString);
    }
    if (info->animation == nullptr) {
        delete info;
        return 0;
    }
    info->frameCount = info->animation->totalFrame();
    info->fps = (int) info->animation->frameRate();
    info->limitFps = limitFps;
    if (info->fps > 60 || info->frameCount > 600) {
        delete info;
        return 0;
    }
    info->precache = precache;
    if (info->precache) {
        info->cacheFile = info->path;
        std::string::size_type index = info->cacheFile.find_last_of('/');
        if (index != std::string::npos) {
            std::string dir = info->cacheFile.substr(0, index) + "/acache";
            mkdir(dir.c_str(), 0777);
            info->cacheFile.insert(index, "/acache");
        }
        info->cacheFile += std::to_string(w) + "_" + std::to_string(h);
        if (color != 0) {
            info->cacheFile += "_" + std::to_string(color);
        }
        if (limitFps) {
            info->cacheFile += ".s.cache";
        } else {
            info->cacheFile += ".cache";
        }
        FILE *precacheFile = fopen(info->cacheFile.c_str(), "r+");
        if (precacheFile == nullptr) {
            info->createCache = true;
        } else {
            uint8_t temp;
            size_t read = fread(&temp, sizeof(uint8_t), 1, precacheFile);
            info->createCache = read != 1 || temp == 0;
            if (!info->createCache) {
                uint32_t maxFrameSize;
                fread(&maxFrameSize, sizeof(uint32_t), 1, precacheFile);
                info->maxFrameSize = maxFrameSize;
                fread(&(info->imageSize), sizeof(uint32_t), 1, precacheFile);
                info->fileOffset = 9;
                info->fileFrame = 0;
                utimensat(0, info->cacheFile.c_str(), nullptr, 0);
            }
            fclose(precacheFile);
        }
    }

    jint *dataArr = env->GetIntArrayElements(data, nullptr);
    if (dataArr != nullptr) {
        dataArr[0] = (jint) info->frameCount;
        dataArr[1] = (jint) info->animation->frameRate();
        dataArr[2] = info->createCache ? 1 : 0;
        env->ReleaseIntArrayElements(data, dataArr, 0);
    }
    return (jlong) (intptr_t) info;
}

JNIEXPORT jlong Java_org_telegram_ui_Components_RLottieDrawable_getFramesCount(JNIEnv *env, jclass clazz, jstring src, jstring json) {
    auto info = new LottieInfo();
    char const *srcString = env->GetStringUTFChars(src, nullptr);
    info->path = srcString;
    if (json != nullptr) {
        char const *jsonString = env->GetStringUTFChars(json, nullptr);
        if (jsonString) {
            info->animation = rlottie::Animation::loadFromData(jsonString, info->path, nullptr, FitzModifier::None);
            env->ReleaseStringUTFChars(json, jsonString);
        }
    } else {
        info->animation = rlottie::Animation::loadFromFile(info->path, nullptr, FitzModifier::None);
    }
    if (srcString) {
        env->ReleaseStringUTFChars(src, srcString);
    }
    if (info->animation == nullptr) {
        delete info;
        return 0;
    }
    long framesCount = info->animation->totalFrame();
    delete info;
    return (jlong) framesCount;
}

JNIEXPORT jdouble Java_org_telegram_ui_Components_RLottieDrawable_getDuration(JNIEnv *env, jclass clazz, jstring src, jstring json) {
    auto info = new LottieInfo();
    char const *srcString = env->GetStringUTFChars(src, nullptr);
    info->path = srcString;
    if (json != nullptr) {
        char const *jsonString = env->GetStringUTFChars(json, nullptr);
        if (jsonString) {
            info->animation = rlottie::Animation::loadFromData(jsonString, info->path, nullptr, FitzModifier::None);
            env->ReleaseStringUTFChars(json, jsonString);
        }
    } else {
        info->animation = rlottie::Animation::loadFromFile(info->path, nullptr, FitzModifier::None);
    }
    if (srcString) {
        env->ReleaseStringUTFChars(src, srcString);
    }
    if (info->animation == nullptr) {
        delete info;
        return 0;
    }
    double duration = info->animation->duration();
    delete info;
    return (jdouble) duration;
}

JNIEXPORT jlong Java_org_telegram_ui_Components_RLottieDrawable_createWithJson(JNIEnv *env, jclass clazz, jstring json, jstring name, jintArray data, jintArray colorReplacement) {
    std::map<int32_t, int32_t> *colors = nullptr;
    if (colorReplacement != nullptr) {
        jint *arr = env->GetIntArrayElements(colorReplacement, nullptr);
        if (arr != nullptr) {
            jsize len = env->GetArrayLength(colorReplacement);
            colors = new std::map<int32_t, int32_t>();
            for (int32_t a = 0; a < len / 2; a++) {
                (*colors)[arr[a * 2]] = arr[a * 2 + 1];
            }
            env->ReleaseIntArrayElements(colorReplacement, arr, 0);
        }
    }

    auto info = new LottieInfo();

    char const *jsonString = env->GetStringUTFChars(json, nullptr);
    char const *nameString = env->GetStringUTFChars(name, nullptr);
    info->animation = rlottie::Animation::loadFromData(jsonString, nameString, colors);
    if (jsonString) {
        env->ReleaseStringUTFChars(json, jsonString);
    }
    if (nameString) {
        env->ReleaseStringUTFChars(name, nameString);
    }
    if (info->animation == nullptr) {
        delete info;
        return 0;
    }
    info->frameCount = info->animation->totalFrame();
    info->fps = (int) info->animation->frameRate();

    jint *dataArr = env->GetIntArrayElements(data, nullptr);
    if (dataArr != nullptr) {
        dataArr[0] = (int) info->frameCount;
        dataArr[1] = (int) info->animation->frameRate();
        dataArr[2] = 0;
        env->ReleaseIntArrayElements(data, dataArr, 0);
    }
    return (jlong) (intptr_t) info;
}

JNIEXPORT void Java_org_telegram_ui_Components_RLottieDrawable_destroy(JNIEnv *env, jclass clazz, jlong ptr) {
    if (!ptr) {
        return;
    }
    auto info = (LottieInfo *) (intptr_t) ptr;
    delete info;
}

JNIEXPORT void Java_org_telegram_ui_Components_RLottieDrawable_setLayerColor(JNIEnv *env, jclass clazz, jlong ptr, jstring layer, jint color) {
    if (!ptr || layer == nullptr) {
        return;
    }
    auto info = (LottieInfo *) (intptr_t) ptr;
    char const *layerString = env->GetStringUTFChars(layer, nullptr);
    info->animation->setValue<Property::Color>(layerString, Color(((color) & 0xff) / 255.0f, ((color >> 8) & 0xff) / 255.0f, ((color >> 16) & 0xff) / 255.0f));
    if (layerString) {
        env->ReleaseStringUTFChars(layer, layerString);
    }
}

JNIEXPORT void Java_org_telegram_ui_Components_RLottieDrawable_replaceColors(JNIEnv *env, jclass clazz, jlong ptr, jintArray colorReplacement) {
    if (!ptr || colorReplacement == nullptr) {
        return;
    }
    auto info = (LottieInfo *) (intptr_t) ptr;

    jint *arr = env->GetIntArrayElements(colorReplacement, nullptr);
    if (arr != nullptr) {
        jsize len = env->GetArrayLength(colorReplacement);
        for (int32_t a = 0; a < len / 2; a++) {
            (*info->animation->colorMap)[arr[a * 2]] = arr[a * 2 + 1];
        }
        info->animation->resetCurrentFrame();
        env->ReleaseIntArrayElements(colorReplacement, arr, 0);
    }
}


JNIEXPORT jint Java_org_telegram_ui_Components_RLottieDrawable_getFrame(JNIEnv *env, jclass clazz, jlong ptr, jint frame, jobject bitmap, jint w, jint h, jint stride, jboolean clear) {
    if (!ptr || bitmap == nullptr) {
        return 0;
    }
    auto info = (LottieInfo *) (intptr_t) ptr;

    void *pixels;
    bool result = false;
    if (AndroidBitmap_lockPixels(env, bitmap, &pixels) >= 0) {
        Surface surface((uint32_t *) pixels, (size_t) w, (size_t) h, (size_t) stride);
        info->animation->renderSync((size_t) frame, surface, clear, &result);
        AndroidBitmap_unlockPixels(env, bitmap);
    }
    if (!result) {
        return -5;
    }
    return frame;
}
}