rocm-systems/samples/jpegDecodeBatched/jpegdecodebatched.cpp

/*
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*/

#include "../rocjpeg_samples_utils.h"

int main(int argc, char **argv) {
    int device_id = 0;
    bool save_images = false;
    uint8_t num_components;
    uint32_t channel_sizes[ROCJPEG_MAX_COMPONENT] = {};
    std::vector<std::vector<uint32_t>> widths;
    std::vector<std::vector<uint32_t>> heights;
    std::vector<std::vector<uint32_t>> prior_channel_sizes;
    uint32_t num_channels = 0;
    int total_images = 0;
    int batch_size = 2;
    double time_per_image_all = 0;
    double mpixels_all = 0;
    double images_per_sec = 0;
    std::string chroma_sub_sampling = "";
    std::string input_path, output_file_path;
    std::vector<std::string> file_paths = {};
    bool is_dir = false;
    bool is_file = false;
    std::vector<std::vector<char>> batch_images;
    std::vector<RocJpegChromaSubsampling> subsamplings;
    RocJpegBackend rocjpeg_backend = ROCJPEG_BACKEND_HARDWARE;
    RocJpegHandle rocjpeg_handle = nullptr;
    std::vector<RocJpegStreamHandle> rocjpeg_stream_handles;
    RocJpegImage output_image = {};
    std::vector<RocJpegImage> output_images;
    RocJpegDecodeParams decode_params = {};
    RocJpegUtils rocjpeg_utils;

    RocJpegUtils::ParseCommandLine(input_path, output_file_path, save_images, device_id, rocjpeg_backend, decode_params, nullptr, &batch_size, argc, argv);
    
    bool is_roi_valid = false;
    uint32_t roi_width;
    uint32_t roi_height;
    roi_width = decode_params.crop_rectangle.right - decode_params.crop_rectangle.left;
    roi_height = decode_params.crop_rectangle.bottom - decode_params.crop_rectangle.top;
    
    if (!RocJpegUtils::GetFilePaths(input_path, file_paths, is_dir, is_file)) {
        std::cerr << "ERROR: Failed to get input file paths!" << std::endl;
        return EXIT_FAILURE;
    }
    if (!RocJpegUtils::InitHipDevice(device_id)) {
        std::cerr << "ERROR: Failed to initialize HIP!" << std::endl;
        return EXIT_FAILURE;
    }

    CHECK_ROCJPEG(rocJpegCreate(rocjpeg_backend, device_id, &rocjpeg_handle));
    batch_size = std::min(batch_size, static_cast<int>(file_paths.size()));
    rocjpeg_stream_handles.resize(batch_size);
    // create stream handles of batch size
    for(auto i = 0; i < batch_size; i++) {
        CHECK_ROCJPEG(rocJpegStreamCreate(&rocjpeg_stream_handles[i]));
    }

    batch_images.resize(batch_size);
    output_images.resize(batch_size);
    prior_channel_sizes.resize(batch_size, std::vector<uint32_t>(ROCJPEG_MAX_COMPONENT, 0));
    widths.resize(batch_size, std::vector<uint32_t>(ROCJPEG_MAX_COMPONENT, 0));
    heights.resize(batch_size, std::vector<uint32_t>(ROCJPEG_MAX_COMPONENT, 0));
    subsamplings.resize(batch_size);
    std::vector<std::string> base_file_names(batch_size);
    std::cout << "Decoding started, please wait! ... " << std::endl;
    for (int i = 0; i < file_paths.size(); i += batch_size) {
        int batch_end = std::min(i + batch_size, static_cast<int>(file_paths.size()));
        for (int j = i; j < batch_end; j++) {
            int index = j - i;
            base_file_names[index] = file_paths[j].substr(file_paths[j].find_last_of("/\\") + 1);
            // Read an image from disk.
            std::ifstream input(file_paths[j].c_str(), std::ios::in | std::ios::binary | std::ios::ate);
            if (!(input.is_open())) {
                std::cerr << "ERROR: Cannot open image: " << file_paths[j] << std::endl;
                return EXIT_FAILURE;
            }
            // Get the size
            std::streamsize file_size = input.tellg();
            input.seekg(0, std::ios::beg);
            // resize if buffer is too small
            if (batch_images[index].size() < file_size) {
                batch_images[index].resize(file_size);
            }
            if (!input.read(batch_images[index].data(), file_size)) {
                std::cerr << "ERROR: Cannot read from file: " << file_paths[j] << std::endl;
                return EXIT_FAILURE;
            }

            CHECK_ROCJPEG(rocJpegStreamParse(reinterpret_cast<uint8_t*>(batch_images[index].data()), file_size, rocjpeg_stream_handles[index]));
            CHECK_ROCJPEG(rocJpegGetImageInfo(rocjpeg_handle, rocjpeg_stream_handles[index], &num_components, &subsamplings[index], widths[index].data(), heights[index].data()));

            if (roi_width > 0 && roi_height > 0 && roi_width <= widths[index][0] && roi_height <= heights[index][0]) {
                is_roi_valid = true; 
            }

            rocjpeg_utils.GetChromaSubsamplingStr(subsamplings[index], chroma_sub_sampling);
            if (widths[index][0] < 64 || heights[index][0] < 64) {
                std::cerr << "The image resolution is not supported by VCN Hardware" << std::endl;
                if (is_dir) {
                    std::cout << std::endl;
                    continue;
                } else
                    return EXIT_FAILURE;
            }

            if (subsamplings[index] == ROCJPEG_CSS_411 || subsamplings[index] == ROCJPEG_CSS_UNKNOWN) {
                std::cerr << "The chroma sub-sampling is not supported by VCN Hardware" << std::endl;
                if (is_dir) {
                    std::cout << std::endl;
                    continue;
                } else
                    return EXIT_FAILURE;
            }

            if (rocjpeg_utils.GetChannelPitchAndSizes(decode_params, subsamplings[index], widths[index].data(), heights[index].data(), num_channels, output_images[index], channel_sizes)) {
                std::cerr << "ERROR: Failed to get the channel pitch and sizes" << std::endl;
                return EXIT_FAILURE;
            }

            // allocate memory for each channel and reuse them if the sizes remain unchanged for a new image.
            for (int n = 0; n < num_channels; n++) {
                if (prior_channel_sizes[index][n] != channel_sizes[n]) {
                    if (output_images[index].channel[n] != nullptr) {
                        CHECK_HIP(hipFree((void *)output_images[index].channel[n]));
                        output_images[index].channel[n] = nullptr;
                    }
                    CHECK_HIP(hipMalloc(&output_images[index].channel[n], channel_sizes[n]));
                    prior_channel_sizes[index][n] = channel_sizes[n];
                }
            }
        }
        int current_batch_size = batch_end - i;

        auto start_time = std::chrono::high_resolution_clock::now();
        CHECK_ROCJPEG(rocJpegDecodeBatched(rocjpeg_handle, rocjpeg_stream_handles.data(), current_batch_size, &decode_params, output_images.data()));
        auto end_time = std::chrono::high_resolution_clock::now();
        double time_per_batch_in_milli_sec = std::chrono::duration<double, std::milli>(end_time - start_time).count();

        double image_size_in_mpixels = 0;
        for (int b = 0; b < current_batch_size; b++) {
            image_size_in_mpixels += (static_cast<double>(widths[b][0]) * static_cast<double>(heights[b][0]) / 1000000);
        }

        total_images += current_batch_size;

        if (save_images) {
            for (int b = 0; b < current_batch_size; b++) {
                std::string image_save_path = output_file_path;
                //if ROI is present, need to pass roi_width and roi_height
                uint32_t width = is_roi_valid ? roi_width : widths[b][0];
                uint32_t height = is_roi_valid ? roi_height : heights[b][0];
                if (is_dir) {
                    rocjpeg_utils.GetOutputFileExt(decode_params.output_format, base_file_names[b], width, height, subsamplings[b], image_save_path);
                }
                rocjpeg_utils.SaveImage(image_save_path, &output_images[b], width, height, subsamplings[b], decode_params.output_format);
            }
        }

        if (is_dir) {
            time_per_image_all += time_per_batch_in_milli_sec;
            mpixels_all += image_size_in_mpixels;
        }

        // Clear the batch_images vector after processing each batch
        for (int j = i; j < batch_end; j++) {
            batch_images[j - i].clear();
        }
    }

    if (is_dir) {
        time_per_image_all = time_per_image_all / total_images;
        images_per_sec = 1000 / time_per_image_all;
        double mpixels_per_sec = mpixels_all * images_per_sec / total_images;
        std::cout << "Total decoded images: " << total_images << std::endl;
        if (total_images) {
            std::cout << "Average processing time per image (ms): " << time_per_image_all << std::endl;
            std::cout << "Average decoded images per sec (Images/Sec): " << images_per_sec << std::endl;
            std::cout << "Average decoded images size (Mpixels/Sec): " << mpixels_per_sec << std::endl;
        }
    }

    //cleanup
    for (auto& it : output_images) {
        for (int i = 0; i < ROCJPEG_MAX_COMPONENT; i++) {
            if (it.channel[i] != nullptr) {
                CHECK_HIP(hipFree((void *)it.channel[i]));
                it.channel[i] = nullptr;
            }
        }
    }
    CHECK_ROCJPEG(rocJpegDestroy(rocjpeg_handle));
    for(auto& it : rocjpeg_stream_handles) {
        CHECK_ROCJPEG(rocJpegStreamDestroy(it));
    }

    std::cout << "Decoding completed!" << std::endl;
    return EXIT_SUCCESS;
}