Function jpeg_decode_PS

Source/Core/JpegTask.cpp:130–194

* JPEG decoding ucode found in Ocarina of Time, Pokemon Stadium 1 and * Pokemon Stadium 2. **************************************************************************/

 * Pokemon Stadium 2.
 **************************************************************************/
void jpeg_decode_PS(OSTask *task)
{
	s16 *macroblock {};
    s16 qtables[3][SUBBLOCK_SIZE];
    u32 mb {};

    #ifdef DAEDALUS_DEBUG_CONSOLE
    if (task->t.flags & 0x1)
    {
        DBGConsole_Msg(0, "jpeg_decode_PS: task yielding not implemented");
        return;
    }
    #endif
    u32       address          {rdram_read_u32((u32)task->t.data_ptr)};
    const u32 macroblock_count {rdram_read_u32((u32)task->t.data_ptr + 4)};
    const u32 mode             {rdram_read_u32((u32)task->t.data_ptr + 8)};
    const u32 qtableY_ptr      {rdram_read_u32((u32)task->t.data_ptr + 12)};
    const u32 qtableU_ptr      {rdram_read_u32((u32)task->t.data_ptr + 16)};
    const u32 qtableV_ptr      {rdram_read_u32((u32)task->t.data_ptr + 20)};

    #ifdef DAEDALUS_DEBUG_CONSOLE
    if (mode != 0 && mode != 2)
    {
        DBGConsole_Msg(0, "jpeg_decode_PS: invalid mode %d", mode);
        return;
    }
    #endif

    rdram_read_many_u16((u16*)qtables[0], qtableY_ptr, SUBBLOCK_SIZE);
    rdram_read_many_u16((u16*)qtables[1], qtableU_ptr, SUBBLOCK_SIZE);
    rdram_read_many_u16((u16*)qtables[2], qtableV_ptr, SUBBLOCK_SIZE);

	void (*EmitTilesMode)(const tile_line_emitter_t, const s16 *, u32);

	if (mode == 0)
	{
		EmitTilesMode =  EmitTilesMode0;
	}
	else
	{
		EmitTilesMode =  EmitTilesMode2;
	}

	const u32 subblock_count {mode + 4};
	const u32 macroblock_size {2*subblock_count*SUBBLOCK_SIZE};

	macroblock = (s16 *)malloc(sizeof(*macroblock) * macroblock_size);
  #ifdef DAEDALUS_DEBUG_CONSOLE
	if (!macroblock)
	{
		DBGConsole_Msg(0, "jpeg_decode_PS: could not allocate macroblock");
		return;
	}
  #endif

    for (mb = 0; mb < macroblock_count; ++mb)
    {
        rdram_read_many_u16((u16*)macroblock, address, macroblock_size >> 1);