C++ READ_UINT16函数代码示例

static gboolean
parse_sprite_trajectory (GstBitReader * br,
    GstMpeg4SpriteTrajectory * sprite_traj, guint no_of_sprite_warping_points)
{
  guint i, length;

  for (i = 0; i < no_of_sprite_warping_points; i++) {

    if (!decode_vlc (br, &length, mpeg4_dmv_size_vlc_table,
            G_N_ELEMENTS (mpeg4_dmv_size_vlc_table)))
      goto failed;

    if (length)
      READ_UINT16 (br, sprite_traj->vop_ref_points[i], length);
    CHECK_MARKER (br);

    if (!decode_vlc (br, &length, mpeg4_dmv_size_vlc_table,
            G_N_ELEMENTS (mpeg4_dmv_size_vlc_table)))
      goto failed;

    if (length)
      READ_UINT16 (br, sprite_traj->sprite_ref_points[i], length);
    CHECK_MARKER (br);
  }

  return TRUE;

failed:
  GST_WARNING ("Could not parse the sprite trajectory");
  return FALSE;
}

void OSystem_Android::disableCursorPalette(bool disable) {
	ENTER("%d", disable);

	// when disabling the cursor palette, and we're running a clut8 game,
	// it expects the game palette to be used for the cursor
	if (disable && _game_texture->hasPalette()) {
		const byte *src = _game_texture->palette_const();
		byte *dst = _mouse_texture_palette->palette();

		const Graphics::PixelFormat &pf_src =
			_game_texture->getPalettePixelFormat();
		const Graphics::PixelFormat &pf_dst =
			_mouse_texture_palette->getPalettePixelFormat();

		uint8 r, g, b;

		for (uint i = 0; i < 256; ++i, src += 2, dst += 2) {
			pf_src.colorToRGB(READ_UINT16(src), r, g, b);
			WRITE_UINT16(dst, pf_dst.RGBToColor(r, g, b));
		}

		byte *p = _mouse_texture_palette->palette() + _mouse_keycolor * 2;
		WRITE_UINT16(p, READ_UINT16(p) & ~1);
	}

	_use_mouse_palette = !disable;
}

gboolean
mpeg_util_parse_sequence_hdr (MPEGSeqHdr * hdr, GstBuffer * buffer)
{
  GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buffer);
  guint8 dar_idx, par_idx;
  guint8 load_intra_flag, load_non_intra_flag;

  /* skip sync word */
  if (!gst_bit_reader_skip (&reader, 8 * 4))
    return FALSE;

  /* resolution */
  READ_UINT16 (&reader, hdr->width, 12);
  READ_UINT16 (&reader, hdr->height, 12);

  /* aspect ratio */
  READ_UINT8 (&reader, dar_idx, 4);
  set_par_from_dar (hdr, dar_idx);

  /* framerate */
  READ_UINT8 (&reader, par_idx, 4);
  set_fps_from_code (hdr, par_idx);

  /* bitrate */
  READ_UINT32 (&reader, hdr->bitrate, 18);

  if (!gst_bit_reader_skip (&reader, 1))
    return FALSE;

  /* VBV buffer size */
  READ_UINT16 (&reader, hdr->vbv_buffer, 10);

  /* constrained parameters flag */
  READ_UINT8 (&reader, hdr->constrained_parameters_flag, 1);

  /* intra quantizer matrix */
  READ_UINT8 (&reader, load_intra_flag, 1);
  if (load_intra_flag) {
    gint i;
    for (i = 0; i < 64; i++)
      READ_UINT8 (&reader, hdr->intra_quantizer_matrix[mpeg_zigzag_8x8[i]], 8);
  } else
    memcpy (hdr->intra_quantizer_matrix, default_intra_quantizer_matrix, 64);

  /* non intra quantizer matrix */
  READ_UINT8 (&reader, load_non_intra_flag, 1);
  if (load_non_intra_flag) {
    gint i;
    for (i = 0; i < 64; i++)
      READ_UINT8 (&reader, hdr->non_intra_quantizer_matrix[mpeg_zigzag_8x8[i]],
          8);
  } else
    memset (hdr->non_intra_quantizer_matrix, 16, 64);

  return TRUE;

error:
  GST_WARNING ("error parsing \"Sequence Header\"");
  return FALSE;
}

void Transport::nfcGetRecordInfo(size_t recordNumber, uint16_t* pType, uint16_t* info, size_t infoCount)
{
  uint8_t out[2];
  uint8_t in[2+2*infoCount];
  WRITE_UINT16(&out[0], recordNumber);
  command(Transport::NFC_GET_RECORD_INFO, out, sizeof(out), in, sizeof(in));
  READ_UINT16(&in[0], *pType);
  for(int i = 0; i < infoCount; i++)
  {
    READ_UINT16(&in[2+2*i], info[i]);
  }
}

void Surface::scaleTransparentCopy(const Common::Rect &srcRect, const Common::Rect &dstRect) const {
	// I'm doing simple linear scaling here
	// dstRect(x, y) = srcRect(x * srcW / dstW, y * srcH / dstH);

	Graphics::Surface *screen = ((PegasusEngine *)g_engine)->_gfx->getCurSurface();

	int srcW = srcRect.width();
	int srcH = srcRect.height();
	int dstW = dstRect.width();
	int dstH = dstRect.height();

	for (int y = 0; y < dstH; y++) {
		for (int x = 0; x < dstW; x++) {
			if (g_system->getScreenFormat().bytesPerPixel == 2) {
				uint16 color = READ_UINT16((byte *)_surface->getBasePtr(
						x * srcW / dstW + srcRect.left,
						y * srcH / dstH + srcRect.top));
				if (!isTransparent(color))
					WRITE_UINT16((byte *)screen->getBasePtr(x + dstRect.left, y + dstRect.top), color);
			} else if (g_system->getScreenFormat().bytesPerPixel == 4) {
				uint32 color = READ_UINT32((byte *)_surface->getBasePtr(
						x * srcW / dstW + srcRect.left,
						y * srcH / dstH + srcRect.top));
				if (!isTransparent(color))
					WRITE_UINT32((byte *)screen->getBasePtr(x + dstRect.left, y + dstRect.top), color);
			}
		}
	}
}

void hwTimer32ClearEvent(soc_timer32_num_t timer_num)
{
    unsigned int module        = timer32_module(timer_num);
    unsigned int timer         = timer32_in_module(timer_num);
#ifdef B4860_FAMILY
    uint16_t    reg;
#endif
 
#ifdef HW_TIMER_ERROR_CHECKING

    if (timer_num >= NUM_OF_HW_TIMERS_32b)
    {
#ifdef HW_TIMER_ERROR_ASSERT
        OS_ASSERT;
#endif /* HW_TIMER_ERROR_ASSERT */
        return;
    }
#endif /* HW_TIMER_ERROR_CHECKING */
#ifdef B4860_FAMILY
    CLEAR_UINT16(soc_timer32_module[module].tmr[timer].tmr_sctl, TMR32_SCTL_TCF);
    DBAR_SCFG();
    READ_UINT16(reg, soc_timer32_module[module].tmr[timer].tmr_sctl);
#else
    CLEAR_UINT32(soc_timer32_module[module].tmr[timer].tmr_sctl, TMR32_SCTL_TCF);
#endif //B4860_FAMILY
}

void CloudIcon::makeAlphaIcon(const Graphics::Surface &icon, float alpha) {
	_alphaIcon.copyFrom(icon);

	byte *pixels = (byte *)_alphaIcon.getPixels();
	for (int y = 0; y < _alphaIcon.h; y++) {
		byte *row = pixels + y * _alphaIcon.pitch;
		for (int x = 0; x < _alphaIcon.w; x++) {
			uint32 srcColor;
			if (_alphaIcon.format.bytesPerPixel == 2)
				srcColor = READ_UINT16(row);
			else if (_alphaIcon.format.bytesPerPixel == 3)
				srcColor = READ_UINT24(row);
			else
				srcColor = READ_UINT32(row);

			// Update color's alpha
			byte r, g, b, a;
			_alphaIcon.format.colorToARGB(srcColor, a, r, g, b);
			a = (byte)(a * alpha);
			uint32 color = _alphaIcon.format.ARGBToColor(a, r, g, b);

			if (_alphaIcon.format.bytesPerPixel == 2)
				*((uint16 *)row) = color;
			else
				*((uint32 *)row) = color;

			row += _alphaIcon.format.bytesPerPixel;
		}
	}
}

/* Used by client_x11.c, for parsing xauth */
int
parse_uint16(struct simple_buffer *buffer, uint32_t *result)
{
  if (LEFT < 2)
    return 0;

  *result = READ_UINT16(HERE);
  ADVANCE(2);
  return 1;
}

void FlicDecoder::FlicVideoTrack::decodeDeltaFLC(uint8 *data) {
	uint16 linesInChunk = READ_LE_UINT16(data); data += 2;
	uint16 currentLine = 0;
	uint16 packetCount = 0;

	while (linesInChunk--) {
		uint16 opcode;

		// First process all the opcodes.
		do {
			opcode = READ_LE_UINT16(data); data += 2;

			switch ((opcode >> 14) & 3) {
			case OP_PACKETCOUNT:
				packetCount = opcode;
				break;
			case OP_UNDEFINED:
				break;
			case OP_LASTPIXEL:
				*((byte *)_surface->getBasePtr(getWidth() - 1, currentLine)) = (opcode & 0xFF);
				_dirtyRects.push_back(Common::Rect(getWidth() - 1, currentLine, getWidth(), currentLine + 1));
				break;
			case OP_LINESKIPCOUNT:
				currentLine += -(int16)opcode;
				break;
			}
		} while (((opcode >> 14) & 3) != OP_PACKETCOUNT);

		uint16 column = 0;

		// Now interpret the RLE data
		while (packetCount--) {
			column += *data++;
			int rleCount = (int8)*data++;
			if (rleCount > 0) {
				memcpy((byte *)_surface->getBasePtr(column, currentLine), data, rleCount * 2);
				data += rleCount * 2;
				_dirtyRects.push_back(Common::Rect(column, currentLine, column + rleCount * 2, currentLine + 1));
			} else if (rleCount < 0) {
				rleCount = -rleCount;
				uint16 dataWord = READ_UINT16(data); data += 2;
				for (int i = 0; i < rleCount; ++i) {
					WRITE_UINT16((byte *)_surface->getBasePtr(column + i * 2, currentLine), dataWord);
				}
				_dirtyRects.push_back(Common::Rect(column, currentLine, column + rleCount * 2, currentLine + 1));
			} else { // End of cutscene ?
				return;
			}
			column += rleCount * 2;
		}

		currentLine++;
	}
}

void OSystem_Android::setCursorPaletteInternal(const byte *colors,
												uint start, uint num) {
	const Graphics::PixelFormat &pf =
		_mouse_texture_palette->getPalettePixelFormat();
	byte *p = _mouse_texture_palette->palette() + start * 2;

	for (uint i = 0; i < num; ++i, colors += 3, p += 2)
		WRITE_UINT16(p, pf.RGBToColor(colors[0], colors[1], colors[2]));

	p = _mouse_texture_palette->palette() + _mouse_keycolor * 2;
	WRITE_UINT16(p, READ_UINT16(p) & ~1);
}

void Transport::nfcDecodePrefix(uint8_t prefix, char* data, size_t* pDataLength)
{
  uint8_t out[] = { prefix };
  uint8_t in[2 + 36]; //max prefix length is 36
  command(Transport::NFC_DECODE_PREFIX, out, sizeof(out), in, sizeof(in));
  size_t length;
  READ_UINT16(&in[0], length);
  if(length < *pDataLength)
  {
    *pDataLength = length;
  }
  memcpy(data, &in[2], *pDataLength);
}

void TinyGLBlit(byte *dst, byte *src, int x, int y, int width, int height, bool trans) {
	int srcPitch = width * 2;
	int dstPitch = 640 * 2;
	int srcX, srcY;
	int l, r;

	if (x > 639 || y > 479)
		return;

	if (x < 0) {
		srcX = -x;
		x = 0;
	} else {
		srcX = 0;
	}
	if (y < 0) {
		srcY = -y;
		y = 0;
	} else {
		srcY = 0;
	}

	if (x + width > 640)
		width -= (x + width) - 640;

	if (y + height > 480)
		height -= (y + height) - 480;

	dst += (x + (y * 640)) * 2;
	src += (srcX + (srcY * width)) * 2;

	int copyWidth = width * 2;

	if (!trans) {
		for (l = 0; l < height; l++) {
			memcpy(dst, src, copyWidth);
			dst += dstPitch;
			src += srcPitch;
		}
	} else {
		for (l = 0; l < height; l++) {
			for (r = 0; r < copyWidth; r += 2) {
				uint16 pixel = READ_UINT16(src + r);
				if (pixel != 0xf81f)
					WRITE_UINT16(dst + r, pixel);
			}
			dst += dstPitch;
			src += srcPitch;
		}
	}
}

void SaveLoadManager::convertThumb16To8(Graphics::Surface *thumb16, Graphics::Surface *thumb8) {
	thumb8->create(thumb16->w, thumb16->h, Graphics::PixelFormat::createFormatCLUT8());
	Graphics::PixelFormat pixelFormat16(2, 5, 6, 5, 0, 11, 5, 0, 0);

	byte paletteR[PALETTE_SIZE];
	byte paletteG[PALETTE_SIZE];
	byte paletteB[PALETTE_SIZE];
	for (int palIndex = 0; palIndex < PALETTE_SIZE; ++palIndex) {
		uint16 p = READ_UINT16(&_vm->_graphicsMan->_palettePixels[palIndex * 2]);
		pixelFormat16.colorToRGB(p, paletteR[palIndex], paletteG[palIndex], paletteB[palIndex]);
	}

	const uint16 *srcP = (const uint16 *)thumb16->getPixels();
	byte *destP = (byte *)thumb8->getPixels();

	for (int yp = 0; yp < thumb16->h; ++yp) {
		const uint16 *lineSrcP = srcP;
		byte *lineDestP = destP;

		for (int xp = 0; xp < thumb16->w; ++xp) {
			byte r, g, b;
			pixelFormat16.colorToRGB(*lineSrcP++, r, g, b);

			// Do like in the original and show thumbnail as a grayscale picture
			int lum = (r * 21 + g * 72 + b * 7) / 100;
			r = g = b = lum;

			// Scan the palette for the closest match
			int difference = 99999, foundIndex = 0;
			for (int palIndex = 0; palIndex < PALETTE_SIZE; ++palIndex) {
				byte rCurrent = paletteR[palIndex];
				byte gCurrent = paletteG[palIndex];
				byte bCurrent = paletteB[palIndex];

				int diff = ABS((int)r - (int)rCurrent) + ABS((int)g - (int)gCurrent) + ABS((int)b - (int)bCurrent);
				if (diff < difference) {
					difference = diff;
					foundIndex = palIndex;
				}
			}

			*lineDestP++ = foundIndex;
		}

		// Move to the start of the next line
		srcP += thumb16->w;
		destP += thumb16->w;
	}
}

void OSystem_Android::grabPalette(byte *colors, uint start, uint num) {
	ENTER("%p, %u, %u", colors, start, num);

#ifdef USE_RGB_COLOR
	assert(_game_texture->hasPalette());
#endif

	GLTHREADCHECK;

	const Graphics::PixelFormat &pf = _game_texture->getPalettePixelFormat();
	const byte *p = _game_texture->palette_const() + start * 2;

	for (uint i = 0; i < num; ++i, colors += 3, p += 2)
		pf.colorToRGB(READ_UINT16(p), colors[0], colors[1], colors[2]);
}

gboolean
mpeg_util_parse_sequence_extension (MPEGSeqExtHdr * hdr, GstBuffer * buffer)
{
  GstBitReader reader = GST_BIT_READER_INIT_FROM_BUFFER (buffer);;

  /* skip sync word */
  if (!gst_bit_reader_skip (&reader, 8 * 4))
    return FALSE;

  /* skip extension code */
  if (!gst_bit_reader_skip (&reader, 4))
    return FALSE;

  /* skip profile and level escape bit */
  if (!gst_bit_reader_skip (&reader, 1))
    return FALSE;

  READ_UINT8 (&reader, hdr->profile, 3);
  READ_UINT8 (&reader, hdr->level, 4);

  /* progressive */
  READ_UINT8 (&reader, hdr->progressive, 1);

  /* chroma format */
  READ_UINT8 (&reader, hdr->chroma_format, 2);

  /* resolution extension */
  READ_UINT8 (&reader, hdr->horiz_size_ext, 2);
  READ_UINT8 (&reader, hdr->vert_size_ext, 2);

  READ_UINT16 (&reader, hdr->bitrate_ext, 12);

  /* skip to framerate extension */
  if (!gst_bit_reader_skip (&reader, 9))
    return FALSE;

  /* framerate extension */
  READ_UINT8 (&reader, hdr->fps_n_ext, 2);
  READ_UINT8 (&reader, hdr->fps_d_ext, 2);

  return TRUE;

error:
  GST_WARNING ("error parsing \"Sequence Extension\"");
  return FALSE;
}