SceDmacplus CSC

typedef struct SceDmacPlusCscParams {
    uint16_t ctm[3][3]; /* 10-bit fixed point? */
    uint8_t unk1;
    uint8_t padding;
    uint16_t unk2;
} SceDmacPlusCscParams;

typedef struct SceMpegYCrCbBuffer {
    SceInt32    iFrameBufferHeight16;
    SceInt32    iFrameBufferWidth16;
    SceInt32    iUnknown;           // Set to 0
    SceInt32    iUnknown2;          // Set to 1
    ScePVoid    pYBuffer;           // pointer to YBuffer (in VME EDRAM?)
    ScePVoid    pYBuffer2;          // pointer to YBuffer + framebufferwidth*(frameheight/32)
    ScePVoid    pCrBuffer;          // pointer to CrBuffer (in VME EDRAM?)
    ScePVoid    pCbBuffer;          // pointer to CbBuffer (in VME EDRAM?)
    ScePVoid    pCrBuffer2;         // pointer to CrBuffer + (framebufferwidth/2)*(frameheight/64)
    ScePVoid    pCbBuffer2;         // pointer to CbBuffer + (framebufferwidth/2)*(frameheight/64)
    SceInt32    iFrameHeight;
    SceInt32    iFrameWidth;
    SceInt32    iFrameBufferWidth;
    SceInt32    iUnknown3[11];
} __attribute__((aligned(64))) SceMpegYCrCbBuffer;

uint sceDmacplus_driver_0xB269EAC9_csc_params(int colorfmt, int stride, SceDmacPlusCscParams *cscparams)
{
  uint ret;

  ret = sceKernelCpuSuspendIntr();
  if ((g_dmac_status & 2) == 0) {
    g_csc_matrix0 =
         (cscparams->ctm[2] & 0x3ff) << 0x14 | (cscparams->ctm[1] & 0x3ff) << 10 |
         cscparams->ctm[0] & 0x3ff;
    g_csc_matrix1 =
         (cscparams->ctm[1][2] & 0x3ff) << 0x14 | (cscparams->ctm[1][1] & 0x3ff) << 10 |
         cscparams->ctm[1][0] & 0x3ff;
    g_csc_matrix2 =
         (cscparams->ctm[2][2] & 0x3ff) << 0x14 | (cscparams->ctm[2][1] & 0x3ff) << 10 |
         cscparams->ctm[2][0] & 0x3ff;
    g_csc_params = (cscparams->unk2 & 1) << 8 | (uint)cscparams->unk1;
    write_volatile_4(DAT_bc800150,g_csc_matrix0);
    write_volatile_4(DAT_bc800154,g_csc_matrix1);
    write_volatile_4(DAT_bc800158,g_csc_matrix2);
    write_volatile_4(DAT_bc80015c,g_csc_params);
    g_csc_stride = stride;
    g_csc_colorfmt = colorfmt;
    sceKernelCpuResumeIntr(ret);
    ret = 0;
  }
  else {
    sceKernelCpuResumeIntr(ret);
    ret = 0x80000021;
  }
  return ret;
}

int sceDmacplus_driver_0x9C492B9B_csc_vme(void *pRGBbuffer, void *pRGBbuffer2, SceMpegYCrCbBuffer *pYCrCbBuffer)
{
  uint ret;
  uint flags;
  uint param;
  ushort unk;

  ret = 0x80000103;
  if (pRGBbuffer != NULL) {
    flags = sceKernelCpuSuspendIntr();
    unk = 0x1a;
    if ((pYCrCbBuffer->iFrameBufferWidth16 & 7U | g_csc_colorfmt) == 0) {
      unk = 10;
    }
    if ((g_dmac_status & unk) == 0) {
      write_volatile_4(DAT_bc800120,pYCrCbBuffer->pYBuffer);
      write_volatile_4(DAT_bc800128,pYCrCbBuffer->pYBuffer2);
      write_volatile_4(DAT_bc800130,pYCrCbBuffer->pCrBuffer);
      write_volatile_4(DAT_bc800134,pYCrCbBuffer->pCbBuffer);
      write_volatile_4(DAT_bc800138,pYCrCbBuffer->pCrBuffer2);
      write_volatile_4(DAT_bc80013c,pYCrCbBuffer->pCbBuffer2);
      write_volatile_4(DAT_bc800144,pRGBbuffer);
      write_volatile_4(DAT_bc800148,pRGBbuffer2);
      if (pRGBbuffer2 == NULL) {
        param = g_csc_stride << 8 | g_csc_colorfmt << 1;
      }
      else {
        param = g_csc_stride << 8 | g_csc_colorfmt << 1 | 1;
      }
      write_volatile_4(DAT_bc80014c,param);
      write_volatile_4(DAT_bc800140,
                       (pYCrCbBuffer->iFrameBufferHeight16 & 0x3fU) << 0x10 |
                       (pYCrCbBuffer->iFrameBufferWidth16 & 0x3fU) << 8 |
                       (pYCrCbBuffer->iUnknown & 1U) << 2 | (pYCrCbBuffer->iUnknown2 & 1U) << 1 |1)
      ;
      write_volatile_4(DAT_bc800160,0xd);
      g_dmac_status = g_dmac_status | 0x8002;
      sceKernelClearEventFlag(g_SceDmacplusAvc_evflag,0xfffffffc);
      sceKernelCpuResumeIntrWithSync(flags);
      ret = 0;
    }
    else {
      sceKernelCpuResumeIntr(flags);
      ret = 0x80000021;
    }
  }
  return ret;
}

int sceDmacplus_driver_0xD126494B_csc_avc(void *pRGBbuffer, void *pRGBbuffer2, SceMpegYCrCbBuffer *pYCrCbBuffer)
{
  uint ret;
  uint flags;
  uint param;
  ushort tmp;

  ret = 0x80000103;
  if (pRGBbuffer != NULL) {
    flags = sceKernelCpuSuspendIntr();
    tmp = 0x1a;
    if (g_csc_colorfmt == 0) {
      tmp = 10;
    }
    if ((g_dmac_status & tmp) == 0) {
      tmp = g_dmac_status | 0x8002;
      g_dmac_status = g_dmac_status | 2;
      if (g_csc_colorfmt != 0) {
        g_dmac_status = tmp;
      }
      write_volatile_4(DAT_bc800120,pYCrCbBuffer->pYBuffer);
      write_volatile_4(DAT_bc800124,pYCrCbBuffer->pYBuffer2);
      write_volatile_4(DAT_bc800128,pYCrCbBuffer->pCrBuffer);
      write_volatile_4(DAT_bc80012c,pYCrCbBuffer->pCbBuffer);
      write_volatile_4(DAT_bc800130,pYCrCbBuffer->pCrBuffer2);
      write_volatile_4(DAT_bc800134,pYCrCbBuffer->pCbBuffer2);
      write_volatile_4(DAT_bc800138,pYCrCbBuffer->iFrameHeight);
      write_volatile_4(DAT_bc80013c,pYCrCbBuffer->iFrameWidth);
      write_volatile_4(DAT_bc800144,pRGBbuffer);
      write_volatile_4(DAT_bc800148,pRGBbuffer2);
      if (pRGBbuffer2 == NULL) {
        param = g_csc_stride << 8 | g_csc_colorfmt << 1;
      }
      else {
        param = g_csc_stride << 8 | g_csc_colorfmt << 1 | 1;
      }
      write_volatile_4(DAT_bc80014c,param);
      write_volatile_4(DAT_bc800140,
                       (pYCrCbBuffer->iFrameBufferHeight16 & 0x3fU) << 0x10 |
                       (pYCrCbBuffer->iFrameBufferWidth16 & 0x3fU) << 8 |
                       (pYCrCbBuffer->iUnknown & 1U) << 2 | (pYCrCbBuffer->iUnknown2 & 1U) << 1);
      write_volatile_4(DAT_bc800160,0xd);
      sceKernelClearEventFlag(g_SceDmacplusAvc_evflag,0xfffffffc);
      sceKernelCpuResumeIntrWithSync(flags);
      ret = 0;
    }
    else {
      sceKernelCpuResumeIntr(flags);
      ret = 0x80000021;
    }
  }
  return ret;
}

/*
 * sceMpegBaseCscVme calls sceDmacplus_driver_0xB269EAC9_csc_params and then sceDmacplus_driver_0x9C492B9B_csc_vme.
*/