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#include "exceptions.h"
#include "fastvideo.h"
#include <fastvideo_decoder_j2k.h>
#include <iostream>
using boost::shared_ptr;
shared_ptr<OpenJPEGImage>
fastvideo_decompress_j2k (dcp::Data data, int reduce)
{
fastJ2kImageInfo_t info;
fastStatus_t r = fastDecoderJ2kPredecode(&info, data.data().get(), data.size());
if (r != FAST_OK) {
throw FastvideoError ("J2kPredecode");
}
std::cout << "predecode -> " << info.width << "x" << info.height << " stream size " << info.streamSize << "\n";
/* Init */
fastDecoderJ2kStaticParameters_t parameters;
memset(¶meters, 0, sizeof(fastDecoderJ2kStaticParameters_t));
parameters.ResolutionLevels = 5 - reduce;
parameters.verboseLevel = 1;
parameters.enableROI = 0;
parameters.maxTileHeight = info.width;
parameters.maxTileWidth = info.height;
parameters.windowX0 = 0;
parameters.windowY0 = 0;
parameters.windowWidth = info.width;
parameters.windowHeight = info.height;
parameters.truncationLength = 0;
parameters.truncationMode = 0;
parameters.truncationRate = 0;
parameters.DecodePasses = 0;
parameters.imageInfo = &info;
parameters.maxStreamSize = info.streamSize;
fastDecoderJ2kHandle_t decoder;
fastDeviceSurfaceBufferHandle_t buffer;
r = fastDecoderJ2kCreate(
&decoder,
¶meters,
FAST_RGB8, info.width, info.height,
1,
&buffer
);
if (r != FAST_OK) {
std::cout << "r=" << r << "\n";
throw FastvideoError ("J2kCreate");
}
unsigned long long requested_mem_size = 0;
{
unsigned long long component_mem_size = 0;
r = fastDecoderJ2kGetAllocatedGpuMemorySize(decoder, &component_mem_size);
if (r != FAST_OK) {
throw FastvideoError ("J2kGetAllocatedGpuMemorySize");
}
requested_mem_size += component_mem_size;
}
fastExportToHostHandle_t adapter;
fastSurfaceFormat_t surface_format;
r = fastExportToHostCreate(&adapter, &surface_format, buffer);
if (r != FAST_OK) {
throw FastvideoError ("ExportToHostCreate");
}
{
unsigned int component_mem_size = 0;
r = fastExportToHostGetAllocatedGpuMemorySize(adapter, &component_mem_size);
if (r != FAST_OK) {
throw FastvideoError ("ExportToHostGetAllocatedGpuMemorySize");
}
requested_mem_size += component_mem_size;
}
const double gigabyte = 1024.0 * 1024.0 * 1024.0;
printf("\nRequested GPU memory size: %.2lf GB\n", requested_mem_size / gigabyte);
/* Transform */
double total_time = 0;
fastGpuTimerHandle_t device_to_host_timer = 0;
fastGpuTimerCreate(&device_to_host_timer);
fastDecoderJ2kReport_t report;
fastExportParameters_t export_parameters;
export_parameters.convert = FAST_CONVERT_NONE;
int aligned_width = info.width * 3;
aligned_width += 4 - (aligned_width % FAST_ALIGNMENT);
size_t decoded_size = info.height * aligned_width;
uint8_t* decoded = 0;
r = fastMalloc(reinterpret_cast<void**>(&decoded), decoded_size);
if (r != FAST_OK) {
throw FastvideoError ("fastMalloc");
}
r = fastDecoderJ2kTransform (decoder, decoded, decoded_size, &report);
if (r != FAST_OK) {
throw FastvideoError ("J2kTransform");
}
total_time += report.elapsedTime;
fastGpuTimerStart(device_to_host_timer);
r = fastExportToHostCopy(adapter, decoded, info.width, aligned_width, info.height, &export_parameters);
if (r != FAST_OK) {
throw FastvideoError ("ExportToHostCopy");
}
float elapsed_time_gpu = 0.;
fastGpuTimerStop(device_to_host_timer);
fastGpuTimerGetTime(device_to_host_timer, &elapsed_time_gpu);
total_time += elapsed_time_gpu / 1000.0;
if (report.codeblockCount > 0) {
printf("Input image : (%dx%d pixels; %d %d-bit channel(s))\n", info.width, info.height, report.channels, report.bitsPerChannel);
printf("Tile count: %d (%dx%d)\n", report.tileCount, report.tilesX, report.tilesY);
printf("Window mode disabled: decode full image\n");
printf("Resolution levels: %d\n", report.resolutionLevels);
printf("Codeblock size: %dx%d\n", report.cbX, report.cbY);
const double megabyte = 1024.0 * 1024.0;
printf("%7.2f ms 1) Tier-2 time (%d codeblocks)\n", report.s1_tier2 * 1000.0, report.codeblockCount);
printf("%7.2f ms 2) CPU->GPU copy time (%.2lf MB, %.2lf MB/s)\n",
report.s2_copy * 1000.0,
report.copyToGpu_size / megabyte,
report.copyToGpu_size == 0 ? 0 : (report.copyToGpu_size / report.s2_copy / megabyte));
printf("%7.2f ms 3) Tier-1 time\n", report.s3_tier1 * 1000.0);
printf("%7.2f ms 4) DWT time\n", report.s6_dwt * 1000.0);
printf("%7.2f ms 5) Postprocessing time (MCT, DC-shift)\n", report.s7_postprocessing * 1000.0);
printf(" Output size = ");
if (report.outStreamSize < 1024)
printf("%lld bytes", report.outStreamSize);
else
printf("%.0f KB", report.outStreamSize / 1024.0f);
printf(" (%.1f:1)\n", report.outStreamSize == 0 ? 0 : (float)report.outStreamSize / report.inStreamSize);
}
printf("Total decode time for %d images = %.1f ms; %.1f FPS;\n", 1,
total_time * 1000.0, 1 / total_time);
fastGpuTimerDestroy(device_to_host_timer);
/* Close */
r = fastDecoderJ2kDestroy(decoder);
if (r != FAST_OK) {
throw FastvideoError ("J2kDestroy");
}
r = fastExportToHostDestroy(adapter);
if (r != FAST_OK) {
throw FastvideoError ("ExportToHostDestroy");
}
fastFree(decoded);
}
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