예제 #1
0
파일: io_dec.c 프로젝트: 1vanK/Urho3D
static int EmitRescaledRGB(const VP8Io* const io, WebPDecParams* const p) {
  const int mb_h = io->mb_h;
  const int uv_mb_h = (mb_h + 1) >> 1;
  int j = 0, uv_j = 0;
  int num_lines_out = 0;
  while (j < mb_h) {
    const int y_lines_in =
        WebPRescalerImport(p->scaler_y, mb_h - j,
                           io->y + j * io->y_stride, io->y_stride);
    j += y_lines_in;
    if (WebPRescaleNeededLines(p->scaler_u, uv_mb_h - uv_j)) {
      const int u_lines_in =
          WebPRescalerImport(p->scaler_u, uv_mb_h - uv_j,
                             io->u + uv_j * io->uv_stride, io->uv_stride);
      const int v_lines_in =
          WebPRescalerImport(p->scaler_v, uv_mb_h - uv_j,
                             io->v + uv_j * io->uv_stride, io->uv_stride);
      (void)v_lines_in;   // remove a gcc warning
      assert(u_lines_in == v_lines_in);
      uv_j += u_lines_in;
    }
    num_lines_out += ExportRGB(p, p->last_y + num_lines_out);
  }
  return num_lines_out;
}
예제 #2
0
파일: io_dec.c 프로젝트: 1vanK/Urho3D
static int Rescale(const uint8_t* src, int src_stride,
                   int new_lines, WebPRescaler* const wrk) {
  int num_lines_out = 0;
  while (new_lines > 0) {    // import new contributions of source rows.
    const int lines_in = WebPRescalerImport(wrk, new_lines, src, src_stride);
    src += lines_in * src_stride;
    new_lines -= lines_in;
    num_lines_out += WebPRescalerExport(wrk);    // emit output row(s)
  }
  return num_lines_out;
}
예제 #3
0
static int Rescale(const uint8_t* src, int src_stride,
                   int new_lines, WebPRescaler* const wrk) {
  int num_lines_out = 0;
  while (new_lines > 0) {    
    const int lines_in = WebPRescalerImport(wrk, new_lines, src, src_stride);
    src += lines_in * src_stride;
    new_lines -= lines_in;
    num_lines_out += WebPRescalerExport(wrk);    
  }
  return num_lines_out;
}
예제 #4
0
파일: io.c 프로젝트: venkatarajasekhar/Qt
static int EmitRescaledAlphaRGB(const VP8Io* const io, WebPDecParams* const p) {
  if (io->a != NULL) {
    WebPRescaler* const scaler = &p->scaler_a;
    int j = 0;
    int pos = 0;
    while (j < io->mb_h) {
      j += WebPRescalerImport(scaler, io->mb_h - j,
                              io->a + j * io->width, io->width);
      pos += p->emit_alpha_row(p, pos);
    }
  }
  return 0;
}
예제 #5
0
static int EmitRescaledRGB(const VP8Io* const io, WebPDecParams* const p) {
  const int mb_h = io->mb_h;
  const int uv_mb_h = (mb_h + 1) >> 1;
  int j = 0, uv_j = 0;
  int num_lines_out = 0;
  while (j < mb_h) {
    const int y_lines_in =
        WebPRescalerImport(&p->scaler_y, mb_h - j,
                           io->y + j * io->y_stride, io->y_stride);
    const int u_lines_in =
        WebPRescalerImport(&p->scaler_u, uv_mb_h - uv_j,
                           io->u + uv_j * io->uv_stride, io->uv_stride);
    const int v_lines_in =
        WebPRescalerImport(&p->scaler_v, uv_mb_h - uv_j,
                           io->v + uv_j * io->uv_stride, io->uv_stride);
    (void)v_lines_in;   
    assert(u_lines_in == v_lines_in);
    j += y_lines_in;
    uv_j += u_lines_in;
    num_lines_out += ExportRGB(p, num_lines_out);
  }
  return num_lines_out;
}
예제 #6
0
파일: io_dec.c 프로젝트: 1vanK/Urho3D
static int EmitRescaledAlphaRGB(const VP8Io* const io, WebPDecParams* const p,
                                int expected_num_out_lines) {
  if (io->a != NULL) {
    WebPRescaler* const scaler = p->scaler_a;
    int lines_left = expected_num_out_lines;
    const int y_end = p->last_y + lines_left;
    while (lines_left > 0) {
      const int row_offset = scaler->src_y - io->mb_y;
      WebPRescalerImport(scaler, io->mb_h + io->mb_y - scaler->src_y,
                         io->a + row_offset * io->width, io->width);
      lines_left -= p->emit_alpha_row(p, y_end - lines_left, lines_left);
    }
  }
  return 0;
}