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/*****************************************************************************
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* i420_rgb.h : YUV to bitmap RGB conversion module for vlc
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*****************************************************************************
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* Copyright (C) 2000, 2004 VideoLAN
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* $Id: i420_rgb.h 7194 2004-03-29 19:57:07Z fenrir $
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* Authors: Samuel Hocevar <sam@zoy.org>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/** Number of entries in RGB palette/colormap */
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#define CMAP_RGB2_SIZE 256
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* chroma_sys_t: chroma method descriptor
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* This structure is part of the chroma transformation descriptor, it
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* describes the yuv2rgb specific properties.
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#ifdef MODULE_NAME_IS_i420_rgb
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/**< Pre-calculated conversion tables */
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void *p_base; /**< base for all conversion tables */
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uint8_t *p_rgb8; /**< RGB 8 bits table */
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uint16_t *p_rgb16; /**< RGB 16 bits table */
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uint32_t *p_rgb32; /**< RGB 32 bits table */
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/**< To get RGB value for palette entry i, use (p_rgb_r[i], p_rgb_g[i],
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p_rgb_b[i]). Note these are 16 bits per pixel. For 8bpp entries,
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uint16_t p_rgb_r[CMAP_RGB2_SIZE]; /**< Red values of palette */
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uint16_t p_rgb_g[CMAP_RGB2_SIZE]; /**< Green values of palette */
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uint16_t p_rgb_b[CMAP_RGB2_SIZE]; /**< Blue values of palette */
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/*****************************************************************************
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*****************************************************************************/
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#ifdef MODULE_NAME_IS_i420_rgb
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void E_(I420_RGB8) ( vout_thread_t *, picture_t *, picture_t * );
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void E_(I420_RGB16_dither) ( vout_thread_t *, picture_t *, picture_t * );
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void E_(I420_RGB16) ( vout_thread_t *, picture_t *, picture_t * );
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void E_(I420_RGB32) ( vout_thread_t *, picture_t *, picture_t * );
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/*****************************************************************************
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* CONVERT_*_PIXEL: pixel conversion macros
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*****************************************************************************
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* These conversion routines are used by YUV conversion functions.
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* conversion are made from p_y, p_u, p_v, which are modified, to p_buffer,
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* which is also modified. CONVERT_4YUV_PIXEL is used for 8bpp dithering,
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* CONVERT_4YUV_PIXEL_SCALE does the same but also scales the output.
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*****************************************************************************/
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#define CONVERT_Y_PIXEL( BPP ) \
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/* Only Y sample is present */ \
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p_ybase = p_yuv + *p_y++; \
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*p_buffer++ = p_ybase[RED_OFFSET-((V_RED_COEF*128)>>SHIFT) + i_red] | \
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p_ybase[GREEN_OFFSET-(((U_GREEN_COEF+V_GREEN_COEF)*128)>>SHIFT) \
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+ i_green ] | p_ybase[BLUE_OFFSET-((U_BLUE_COEF*128)>>SHIFT) + i_blue];
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#define CONVERT_YUV_PIXEL( BPP ) \
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/* Y, U and V samples are present */ \
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i_red = (V_RED_COEF * i_vval) >> SHIFT; \
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i_green = (U_GREEN_COEF * i_uval + V_GREEN_COEF * i_vval) >> SHIFT; \
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i_blue = (U_BLUE_COEF * i_uval) >> SHIFT; \
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CONVERT_Y_PIXEL( BPP ) \
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#define CONVERT_Y_PIXEL_DITHER( BPP ) \
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/* Only Y sample is present */ \
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p_ybase = p_yuv + *p_y++; \
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*p_buffer++ = p_ybase[RED_OFFSET-((V_RED_COEF*128+p_dither[i_real_y])>>SHIFT) + i_red] | \
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p_ybase[GREEN_OFFSET-(((U_GREEN_COEF+V_GREEN_COEF)*128+p_dither[i_real_y])>>SHIFT) \
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+ i_green ] | p_ybase[BLUE_OFFSET-((U_BLUE_COEF*128+p_dither[i_real_y])>>SHIFT) + i_blue];
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#define CONVERT_YUV_PIXEL_DITHER( BPP ) \
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/* Y, U and V samples are present */ \
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i_red = (V_RED_COEF * i_vval) >> SHIFT; \
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i_green = (U_GREEN_COEF * i_uval + V_GREEN_COEF * i_vval) >> SHIFT; \
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i_blue = (U_BLUE_COEF * i_uval) >> SHIFT; \
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CONVERT_Y_PIXEL_DITHER( BPP ) \
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#define CONVERT_4YUV_PIXEL( CHROMA ) \
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*p_pic++ = p_lookup[ \
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(((*p_y++ + dither10[i_real_y]) >> 4) << 7) \
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+ ((*p_u + dither20[i_real_y]) >> 5) * 9 \
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+ ((*p_v + dither20[i_real_y]) >> 5) ]; \
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*p_pic++ = p_lookup[ \
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(((*p_y++ + dither11[i_real_y]) >> 4) << 7) \
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+ ((*p_u++ + dither21[i_real_y]) >> 5) * 9 \
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+ ((*p_v++ + dither21[i_real_y]) >> 5) ]; \
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*p_pic++ = p_lookup[ \
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(((*p_y++ + dither12[i_real_y]) >> 4) << 7) \
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+ ((*p_u + dither22[i_real_y]) >> 5) * 9 \
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+ ((*p_v + dither22[i_real_y]) >> 5) ]; \
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*p_pic++ = p_lookup[ \
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(((*p_y++ + dither13[i_real_y]) >> 4) << 7) \
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+ ((*p_u++ + dither23[i_real_y]) >> 5) * 9 \
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+ ((*p_v++ + dither23[i_real_y]) >> 5) ]; \
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#define CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
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*p_pic++ = p_lookup[ \
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( ((*p_y + dither10[i_real_y]) >> 4) << 7) \
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+ ((*p_u + dither20[i_real_y]) >> 5) * 9 \
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+ ((*p_v + dither20[i_real_y]) >> 5) ]; \
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p_y += *p_offset++; \
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p_v += *p_offset++; \
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*p_pic++ = p_lookup[ \
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( ((*p_y + dither11[i_real_y]) >> 4) << 7) \
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+ ((*p_u + dither21[i_real_y]) >> 5) * 9 \
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+ ((*p_v + dither21[i_real_y]) >> 5) ]; \
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p_y += *p_offset++; \
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p_v += *p_offset++; \
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*p_pic++ = p_lookup[ \
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( ((*p_y + dither12[i_real_y]) >> 4) << 7) \
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+ ((*p_u + dither22[i_real_y]) >> 5) * 9 \
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+ ((*p_v + dither22[i_real_y]) >> 5) ]; \
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p_y += *p_offset++; \
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p_v += *p_offset++; \
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*p_pic++ = p_lookup[ \
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( ((*p_y + dither13[i_real_y]) >> 4) << 7) \
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+ ((*p_u + dither23[i_real_y]) >> 5) * 9 \
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+ ((*p_v + dither23[i_real_y]) >> 5) ]; \
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p_y += *p_offset++; \
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p_v += *p_offset++; \
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/*****************************************************************************
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* SCALE_WIDTH: scale a line horizontally
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*****************************************************************************
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* This macro scales a line using rendering buffer and offset array. It works
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* for 1, 2 and 4 Bpp.
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*****************************************************************************/
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#define SCALE_WIDTH \
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/* Horizontal scaling, conversion has been done to buffer. \
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* Rewind buffer and offset, then copy and scale line */ \
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p_buffer = p_buffer_start; \
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p_offset = p_offset_start; \
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for( i_x = p_vout->output.i_width / 16; i_x--; ) \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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for( i_x = p_vout->output.i_width & 15; i_x--; ) \
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*p_pic++ = *p_buffer; p_buffer += *p_offset++; \
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p_pic = (void*)((uint8_t*)p_pic + i_right_margin ); \
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/* No scaling, conversion has been done directly in picture memory. \
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* Increment of picture pointer to end of line is still needed */ \
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p_pic = (void*)((uint8_t*)p_pic + p_dest->p->i_pitch ); \
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/*****************************************************************************
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* SCALE_WIDTH_DITHER: scale a line horizontally for dithered 8 bpp
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*****************************************************************************
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* This macro scales a line using an offset array.
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*****************************************************************************/
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#define SCALE_WIDTH_DITHER( CHROMA ) \
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/* Horizontal scaling - we can't use a buffer due to dithering */ \
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p_offset = p_offset_start; \
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for( i_x = p_vout->output.i_width / 16; i_x--; ) \
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CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
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CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
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CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
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CONVERT_4YUV_PIXEL_SCALE( CHROMA ) \
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for( i_x = p_vout->render.i_width / 16; i_x--; ) \
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CONVERT_4YUV_PIXEL( CHROMA ) \
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CONVERT_4YUV_PIXEL( CHROMA ) \
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CONVERT_4YUV_PIXEL( CHROMA ) \
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CONVERT_4YUV_PIXEL( CHROMA ) \
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/* Increment of picture pointer to end of line is still needed */ \
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p_pic = (void*)((uint8_t*)p_pic + i_right_margin ); \
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/* Increment the Y coordinate in the matrix, modulo 4 */ \
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i_real_y = (i_real_y + 1) & 0x3; \
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/*****************************************************************************
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* SCALE_HEIGHT: handle vertical scaling
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*****************************************************************************
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* This macro handle vertical scaling for a picture. CHROMA may be 420, 422 or
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* 444 for RGB conversion, or 400 for gray conversion. It works for 1, 2, 3
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*****************************************************************************/
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#define SCALE_HEIGHT( CHROMA, BPP ) \
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/* If line is odd, rewind 4:2:0 U and V samples */ \
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if( ((CHROMA == 420) || (CHROMA == 422)) && !(i_y & 0x1) ) \
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p_u -= i_chroma_width; \
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p_v -= i_chroma_width; \
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* Handle vertical scaling. The current line can be copied or next one \
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case -1: /* vertical scaling factor is < 1 */ \
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while( (i_scale_count -= p_vout->output.i_height) > 0 ) \
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/* Height reduction: skip next source line */ \
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p_y += p_vout->render.i_width; \
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if( (CHROMA == 420) || (CHROMA == 422) ) \
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p_u += i_chroma_width; \
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p_v += i_chroma_width; \
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else if( CHROMA == 444 ) \
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p_u += p_vout->render.i_width; \
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p_v += p_vout->render.i_width; \
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i_scale_count += p_vout->render.i_height; \
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case 1: /* vertical scaling factor is > 1 */ \
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while( (i_scale_count -= p_vout->render.i_height) > 0 ) \
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/* Height increment: copy previous picture line */ \
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p_vout->p_vlc->pf_memcpy( p_pic, p_pic_start, \
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p_vout->output.i_width * BPP ); \
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p_pic = (void*)((uint8_t*)p_pic + p_dest->p->i_pitch ); \
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i_scale_count += p_vout->output.i_height; \
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/*****************************************************************************
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* SCALE_HEIGHT_DITHER: handle vertical scaling for dithered 8 bpp
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*****************************************************************************
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* This macro handles vertical scaling for a picture. CHROMA may be 420,
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* 422 or 444 for RGB conversion, or 400 for gray conversion.
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*****************************************************************************/
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#define SCALE_HEIGHT_DITHER( CHROMA ) \
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/* If line is odd, rewind 4:2:0 U and V samples */ \
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if( ((CHROMA == 420) || (CHROMA == 422)) && !(i_y & 0x1) ) \
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p_u -= i_chroma_width; \
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p_v -= i_chroma_width; \
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* Handle vertical scaling. The current line can be copied or next one \
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case -1: /* vertical scaling factor is < 1 */ \
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while( (i_scale_count -= p_vout->output.i_height) > 0 ) \
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/* Height reduction: skip next source line */ \
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p_y += p_vout->render.i_width; \
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if( (CHROMA == 420) || (CHROMA == 422) ) \
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p_u += i_chroma_width; \
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p_v += i_chroma_width; \
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else if( CHROMA == 444 ) \
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p_u += p_vout->render.i_width; \
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p_v += p_vout->render.i_width; \
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i_scale_count += p_vout->render.i_height; \
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case 1: /* vertical scaling factor is > 1 */ \
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while( (i_scale_count -= p_vout->render.i_height) > 0 ) \
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p_y -= p_vout->render.i_width; \
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p_u -= i_chroma_width; \
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p_v -= i_chroma_width; \
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SCALE_WIDTH_DITHER( CHROMA ); \
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i_scale_count += p_vout->output.i_height; \
added
removed
modules/video_chroma/i420_rgb.h
