366 lines
13 KiB
C
366 lines
13 KiB
C
#include "global.h"
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#include "vt.h"
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#define MARKER_ESCAPE 0x00
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#define MARKER_SOI 0xD8
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#define MARKER_SOF 0xC0
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#define MARKER_DHT 0xC4
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#define MARKER_DQT 0xDB
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#define MARKER_DRI 0xDD
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#define MARKER_SOS 0xDA
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#define MARKER_APP0 0xE0
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#define MARKER_APP1 0xE1
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#define MARKER_APP2 0xE2
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#define MARKER_COM 0xFE
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#define MARKER_EOI 0xD9
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/**
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* Configures and schedules a JPEG decoder task and waits for it to finish.
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*/
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void Jpeg_ScheduleDecoderTask(JpegContext* ctx)
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{
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#if 0
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static OSTask_t sJpegTask = {
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M_NJPEGTASK, // type
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0, // flags
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NULL, // ucode_boot
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0, // ucode_boot_size
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gJpegUCode, // ucode
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0x1000, // ucode_size
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gJpegUCodeData, // ucode_data
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0x800, // ucode_data_size
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NULL, // dram_stack
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0, // dram_stack_size
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NULL, // output_buff
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NULL, // output_buff_size
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NULL, // data_ptr
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sizeof(JpegTaskData), // data_size
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NULL, // yield_data_ptr
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0x200, // yield_data_size
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};
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JpegWork* workBuf = ctx->workBuf;
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s32 pad[2];
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workBuf->taskData.address = PHYSICAL_TO_VIRTUAL(&workBuf->data);
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workBuf->taskData.mode = ctx->mode;
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workBuf->taskData.mbCount = 4;
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workBuf->taskData.qTableYPtr = PHYSICAL_TO_VIRTUAL(&workBuf->qTableY);
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workBuf->taskData.qTableUPtr = PHYSICAL_TO_VIRTUAL(&workBuf->qTableU);
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workBuf->taskData.qTableVPtr = PHYSICAL_TO_VIRTUAL(&workBuf->qTableV);
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sJpegTask.flags = 0;
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sJpegTask.ucode_boot = SysUcode_GetUCodeBoot();
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sJpegTask.ucode_boot_size = SysUcode_GetUCodeBootSize();
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sJpegTask.yield_data_ptr = (u64*)&workBuf->yieldData;
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sJpegTask.data_ptr = (u64*)&workBuf->taskData;
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ctx->scTask.next = NULL;
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ctx->scTask.flags = OS_SC_NEEDS_RSP;
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ctx->scTask.msgQ = &ctx->mq;
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ctx->scTask.msg = NULL;
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ctx->scTask.framebuffer = NULL;
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ctx->scTask.list.t = sJpegTask;
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osSendMesg(&gSchedContext.cmdQ, (OSMesg)&ctx->scTask, OS_MESG_BLOCK);
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Sched_SendEntryMsg(&gSchedContext); // osScKickEntryMsg
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osRecvMesg(&ctx->mq, NULL, OS_MESG_BLOCK);
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#endif
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}
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/**
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* Copies a 16x16 block of decoded image data to the Z-buffer.
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*/
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void Jpeg_CopyToZbuffer(u16* src, u16* zbuffer, s32 x, s32 y) {
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u16* dst = zbuffer + (((y * SCREEN_WIDTH) + x) * 16);
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s32 i;
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for (i = 0; i < 16; i++) {
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dst[0] = src[0];
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dst[1] = src[1];
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dst[2] = src[2];
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dst[3] = src[3];
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dst[4] = src[4];
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dst[5] = src[5];
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dst[6] = src[6];
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dst[7] = src[7];
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dst[8] = src[8];
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dst[9] = src[9];
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dst[10] = src[10];
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dst[11] = src[11];
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dst[12] = src[12];
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dst[13] = src[13];
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dst[14] = src[14];
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dst[15] = src[15];
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src += 16;
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dst += SCREEN_WIDTH;
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}
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}
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/**
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* Reads an u16 from a possibly unaligned address in memory.
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*
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* Replaces unaligned 16-bit reads with a pair of aligned reads, allowing for reading the possibly
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* unaligned values in JPEG header files.
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*/
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u16 Jpeg_GetUnalignedU16(u8* ptr) {
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if (((u32)ptr & 1) == 0) {
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// Read the value normally if it's aligned to a 16-bit address.
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return *(u16*)ptr;
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} else {
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// Read unaligned values using two separate aligned memory accesses when it's not.
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return *(u16*)(ptr - 1) << 8 | (*(u16*)(ptr + 1) >> 8);
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}
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}
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/**
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* Parses the markers in the JPEG file, storing information such as the pointer to the image data
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* in `ctx` for later processing.
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*/
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void Jpeg_ParseMarkers(u8* ptr, JpegContext* ctx) {
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u32 exit = false;
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ctx->dqtCount = 0;
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ctx->dhtCount = 0;
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while (true) {
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if (exit) {
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break;
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}
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// 0xFF indicates the start of a JPEG marker, so look for the next.
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if (*ptr++ == 0xFF) {
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switch (*ptr++) {
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case MARKER_ESCAPE: {
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// Compressed value 0xFF is stored as 0xFF00 to escape it, so ignore it.
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break;
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}
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case MARKER_SOI: {
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// Start of Image
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osSyncPrintf("MARKER_SOI\n");
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break;
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}
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case MARKER_APP0: {
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// Application marker for JFIF
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osSyncPrintf("MARKER_APP0 %d\n", Jpeg_GetUnalignedU16(ptr));
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ptr += Jpeg_GetUnalignedU16(ptr);
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break;
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}
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case MARKER_APP1: {
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// Application marker for EXIF
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osSyncPrintf("MARKER_APP1 %d\n", Jpeg_GetUnalignedU16(ptr));
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ptr += Jpeg_GetUnalignedU16(ptr);
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break;
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}
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case MARKER_APP2: {
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osSyncPrintf("MARKER_APP2 %d\n", Jpeg_GetUnalignedU16(ptr));
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ptr += Jpeg_GetUnalignedU16(ptr);
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break;
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}
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case MARKER_DQT: {
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// Define Quantization Table, stored for later processing
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osSyncPrintf("MARKER_DQT %d %d %02x\n", ctx->dqtCount, Jpeg_GetUnalignedU16(ptr), ptr[2]);
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ctx->dqtPtr[ctx->dqtCount++] = ptr + 2;
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ptr += Jpeg_GetUnalignedU16(ptr);
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break;
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}
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case MARKER_DHT: {
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// Define Huffman Table, stored for later processing
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osSyncPrintf("MARKER_DHT %d %d %02x\n", ctx->dhtCount, Jpeg_GetUnalignedU16(ptr), ptr[2]);
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ctx->dhtPtr[ctx->dhtCount++] = ptr + 2;
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ptr += Jpeg_GetUnalignedU16(ptr);
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break;
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}
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case MARKER_DRI: {
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// Define Restart Interval
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osSyncPrintf("MARKER_DRI %d\n", Jpeg_GetUnalignedU16(ptr));
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ptr += Jpeg_GetUnalignedU16(ptr);
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break;
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}
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case MARKER_SOF: {
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// Start of Frame, stores important metadata of the image.
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// Only used for extracting the sampling factors (ctx->mode).
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osSyncPrintf("MARKER_SOF %d "
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"精度%02x " // "accuracy"
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"垂直%d " // "vertical"
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"水平%d " // "horizontal"
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"compo%02x "
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"(1:Y)%d (H0=2,V0=1(422) or 2(420))%02x (量子化テーブル)%02x "
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"(2:Cb)%d (H1=1,V1=1)%02x (量子化テーブル)%02x "
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"(3:Cr)%d (H2=1,V2=1)%02x (量子化テーブル)%02x\n",
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Jpeg_GetUnalignedU16(ptr),
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ptr[2], // precision
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Jpeg_GetUnalignedU16(ptr + 3), // height
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Jpeg_GetUnalignedU16(ptr + 5), // width
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ptr[7], // component count (assumed to be 3)
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ptr[8], ptr[9], ptr[10], // Y component
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ptr[11], ptr[12], ptr[13], // Cb component
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ptr[14], ptr[15], ptr[16] // Cr component
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);
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if (ptr[9] == 0x21) {
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// component Y : V0 == 1
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ctx->mode = 0;
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} else if (ptr[9] == 0x22) {
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// component Y : V0 == 2
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ctx->mode = 2;
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}
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ptr += Jpeg_GetUnalignedU16(ptr);
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break;
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}
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case MARKER_SOS: {
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// Start of Scan marker, indicates the start of the image data.
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osSyncPrintf("MARKER_SOS %d\n", Jpeg_GetUnalignedU16(ptr));
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ptr += Jpeg_GetUnalignedU16(ptr);
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ctx->imageData = ptr;
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break;
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}
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case MARKER_EOI: {
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// End of Image
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osSyncPrintf("MARKER_EOI\n");
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exit = true;
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break;
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}
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default: {
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osSyncPrintf("マーカー不明 %02x\n", ptr[-1]); // "Unknown marker"
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ptr += Jpeg_GetUnalignedU16(ptr);
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break;
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}
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}
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}
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}
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}
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s32 Jpeg_Decode(void* data, void* zbuffer, void* work, u32 workSize) {
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s32 y;
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s32 x;
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u32 j;
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u32 i;
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JpegContext ctx;
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JpegHuffmanTable hTables[4];
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JpegDecoder decoder;
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JpegDecoderState state;
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JpegWork* workBuff;
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OSTime diff;
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OSTime time;
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OSTime curTime;
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workBuff = work;
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time = osGetTime();
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// (?) I guess MB_SIZE=0x180, PROC_OF_MBS=5 which means data is not a part of JpegWork
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ASSERT(workSize >= sizeof(JpegWork));
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osCreateMesgQueue(&ctx.mq, &ctx.msg, 1);
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MsgEvent_SendNullTask();
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curTime = osGetTime();
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diff = curTime - time;
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time = curTime;
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// "Wait for synchronization of fifo buffer"
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osSyncPrintf("*** fifoバッファの同期待ち time = %6.3f ms ***\n", OS_CYCLES_TO_USEC(diff) / 1000.0f);
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ctx.workBuf = workBuff;
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Jpeg_ParseMarkers(data, &ctx);
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curTime = osGetTime();
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diff = curTime - time;
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time = curTime;
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// "Check markers for each segment"
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osSyncPrintf("*** 各セグメントのマーカーのチェック time = %6.3f ms ***\n", OS_CYCLES_TO_USEC(diff) / 1000.0f);
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switch (ctx.dqtCount) {
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case 1:
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JpegUtils_ProcessQuantizationTable(ctx.dqtPtr[0], &workBuff->qTableY, 3);
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break;
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case 2:
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JpegUtils_ProcessQuantizationTable(ctx.dqtPtr[0], &workBuff->qTableY, 1);
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JpegUtils_ProcessQuantizationTable(ctx.dqtPtr[1], &workBuff->qTableU, 1);
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JpegUtils_ProcessQuantizationTable(ctx.dqtPtr[1], &workBuff->qTableV, 1);
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break;
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case 3:
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JpegUtils_ProcessQuantizationTable(ctx.dqtPtr[0], &workBuff->qTableY, 1);
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JpegUtils_ProcessQuantizationTable(ctx.dqtPtr[1], &workBuff->qTableU, 1);
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JpegUtils_ProcessQuantizationTable(ctx.dqtPtr[2], &workBuff->qTableV, 1);
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break;
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default:
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return -1;
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}
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curTime = osGetTime();
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diff = curTime - time;
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time = curTime;
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// "Create quantization table"
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osSyncPrintf("*** 量子化テーブル作成 time = %6.3f ms ***\n", OS_CYCLES_TO_USEC(diff) / 1000.0f);
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switch (ctx.dhtCount) {
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case 1:
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if (JpegUtils_ProcessHuffmanTable(ctx.dhtPtr[0], &hTables[0], workBuff->codesLengths, workBuff->codes, 4)) {
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osSyncPrintf("Error : Cant' make huffman table.\n");
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}
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break;
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case 4:
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if (JpegUtils_ProcessHuffmanTable(ctx.dhtPtr[0], &hTables[0], workBuff->codesLengths, workBuff->codes, 1)) {
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osSyncPrintf("Error : Cant' make huffman table.\n");
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}
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if (JpegUtils_ProcessHuffmanTable(ctx.dhtPtr[1], &hTables[1], workBuff->codesLengths, workBuff->codes, 1)) {
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osSyncPrintf("Error : Cant' make huffman table.\n");
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}
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if (JpegUtils_ProcessHuffmanTable(ctx.dhtPtr[2], &hTables[2], workBuff->codesLengths, workBuff->codes, 1)) {
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osSyncPrintf("Error : Cant' make huffman table.\n");
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}
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if (JpegUtils_ProcessHuffmanTable(ctx.dhtPtr[3], &hTables[3], workBuff->codesLengths, workBuff->codes, 1)) {
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osSyncPrintf("Error : Cant' make huffman table.\n");
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}
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break;
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default:
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return -1;
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}
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curTime = osGetTime();
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diff = curTime - time;
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time = curTime;
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// "Huffman table creation"
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osSyncPrintf("*** ハフマンテーブル作成 time = %6.3f ms ***\n", OS_CYCLES_TO_USEC(diff) / 1000.0f);
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decoder.imageData = ctx.imageData;
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decoder.mode = ctx.mode;
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decoder.unk_05 = 2;
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decoder.hTablePtrs[0] = &hTables[0];
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decoder.hTablePtrs[1] = &hTables[1];
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decoder.hTablePtrs[2] = &hTables[2];
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decoder.hTablePtrs[3] = &hTables[3];
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decoder.unk_18 = 0;
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x = y = 0;
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for (i = 0; i < 300; i += 4) {
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if (JpegDecoder_Decode(&decoder, (u16*)workBuff->data, 4, i != 0, &state)) {
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osSyncPrintf(VT_FGCOL(RED));
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osSyncPrintf("Error : Can't decode jpeg\n");
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osSyncPrintf(VT_RST);
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} else {
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Jpeg_ScheduleDecoderTask(&ctx);
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osInvalDCache(&workBuff->data, sizeof(workBuff->data[0]));
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for (j = 0; j < ARRAY_COUNT(workBuff->data); j++) {
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Jpeg_CopyToZbuffer(workBuff->data[j], zbuffer, x, y);
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x++;
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if (x >= 20) {
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x = 0;
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y++;
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}
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}
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}
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}
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curTime = osGetTime();
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diff = curTime - time;
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time = curTime;
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// "Unfold & draw"
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osSyncPrintf("*** 展開 & 描画 time = %6.3f ms ***\n", OS_CYCLES_TO_USEC(diff) / 1000.0f);
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return 0;
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}
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