imgconvert.c

mpeg4 video codec mpeg4 video codec

/*
 * Misc image convertion routines
 * Copyright (c) 2001, 2002, 2003 Fabrice Bellard.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file imgconvert.c
 * Misc image convertion routines.
 */

/* TODO:
 * - write 'ffimg' program to test all the image related stuff
 * - move all api to slice based system
 * - integrate deinterlacing, postprocessing and scaling in the conversion process
 */

#include "avcodec.h"
#include "dsputil.h"

#ifdef USE_FASTMEMCPY
#include "fastmemcpy.h"
#endif

#ifdef HAVE_MMX
#include "i386/mmx.h"
#endif

#define xglue(x, y) x ## y
#define glue(x, y) xglue(x, y)

#define FF_COLOR_RGB      0 /* RGB color space */
#define FF_COLOR_GRAY     1 /* gray color space */
#define FF_COLOR_YUV      2 /* YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */
#define FF_COLOR_YUV_JPEG 3 /* YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */

#define FF_PIXEL_PLANAR   0 /* each channel has one component in AVPicture */
#define FF_PIXEL_PACKED   1 /* only one components containing all the channels */
#define FF_PIXEL_PALETTE  2  /* one components containing indexes for a palette */

typedef struct PixFmtInfo {
    const char *name;
    uint8_t nb_channels;     /* number of channels (including alpha) */
    uint8_t color_type;      /* color type (see FF_COLOR_xxx constants) */
    uint8_t pixel_type;      /* pixel storage type (see FF_PIXEL_xxx constants) */
    uint8_t is_alpha : 1;    /* true if alpha can be specified */
    uint8_t x_chroma_shift; /* X chroma subsampling factor is 2 ^ shift */
    uint8_t y_chroma_shift; /* Y chroma subsampling factor is 2 ^ shift */
    uint8_t depth;           /* bit depth of the color components */
} PixFmtInfo;

/* this table gives more information about formats */
static PixFmtInfo pix_fmt_info[PIX_FMT_NB] 
#if __STDC_VERSION__ >= 199901L
= {
    /* YUV formats */
    [PIX_FMT_YUV420P] = {
        .name = "yuv420p",
        .nb_channels = 3,
        .color_type = FF_COLOR_YUV,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 8,
        .x_chroma_shift = 1, .y_chroma_shift = 1, 
    },
    [PIX_FMT_YUV422P] = {
        .name = "yuv422p",
        .nb_channels = 3,
        .color_type = FF_COLOR_YUV,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 8,
        .x_chroma_shift = 1, .y_chroma_shift = 0, 
    },
    [PIX_FMT_YUV444P] = {
        .name = "yuv444p",
        .nb_channels = 3,
        .color_type = FF_COLOR_YUV,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 8,
        .x_chroma_shift = 0, .y_chroma_shift = 0, 
    },
    [PIX_FMT_YUV422] = {
        .name = "yuv422",
        .nb_channels = 1,
        .color_type = FF_COLOR_YUV,
        .pixel_type = FF_PIXEL_PACKED,
        .depth = 8,
        .x_chroma_shift = 1, .y_chroma_shift = 0,
    },
    [PIX_FMT_UYVY422] = {
        .name = "uyvy422",
        .nb_channels = 1,
        .color_type = FF_COLOR_YUV,
        .pixel_type = FF_PIXEL_PACKED,
        .depth = 8,
        .x_chroma_shift = 1, .y_chroma_shift = 0,
    },
    [PIX_FMT_YUV410P] = {
        .name = "yuv410p",
        .nb_channels = 3,
        .color_type = FF_COLOR_YUV,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 8,
        .x_chroma_shift = 2, .y_chroma_shift = 2,
    },
    [PIX_FMT_YUV411P] = {
        .name = "yuv411p",
        .nb_channels = 3,
        .color_type = FF_COLOR_YUV,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 8,
        .x_chroma_shift = 2, .y_chroma_shift = 0,
    },

    /* JPEG YUV */
    [PIX_FMT_YUVJ420P] = {
        .name = "yuvj420p",
        .nb_channels = 3,
        .color_type = FF_COLOR_YUV_JPEG,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 8,
        .x_chroma_shift = 1, .y_chroma_shift = 1, 
    },
    [PIX_FMT_YUVJ422P] = {
        .name = "yuvj422p",
        .nb_channels = 3,
        .color_type = FF_COLOR_YUV_JPEG,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 8,
        .x_chroma_shift = 1, .y_chroma_shift = 0, 
    },
    [PIX_FMT_YUVJ444P] = {
        .name = "yuvj444p",
        .nb_channels = 3,
        .color_type = FF_COLOR_YUV_JPEG,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 8,
        .x_chroma_shift = 0, .y_chroma_shift = 0, 
    },

    /* RGB formats */
    [PIX_FMT_RGB24] = {
        .name = "rgb24",
        .nb_channels = 3,
        .color_type = FF_COLOR_RGB,
        .pixel_type = FF_PIXEL_PACKED,
        .depth = 8,
        .x_chroma_shift = 0, .y_chroma_shift = 0,
    },
    [PIX_FMT_BGR24] = {
        .name = "bgr24",
        .nb_channels = 3,
        .color_type = FF_COLOR_RGB,
        .pixel_type = FF_PIXEL_PACKED,
        .depth = 8,
        .x_chroma_shift = 0, .y_chroma_shift = 0,
    },
    [PIX_FMT_RGBA32] = {
        .name = "rgba32",
        .nb_channels = 4, .is_alpha = 1,
        .color_type = FF_COLOR_RGB,
        .pixel_type = FF_PIXEL_PACKED,
        .depth = 8,
        .x_chroma_shift = 0, .y_chroma_shift = 0,
    },
    [PIX_FMT_RGB565] = {
        .name = "rgb565",
        .nb_channels = 3,
        .color_type = FF_COLOR_RGB,
        .pixel_type = FF_PIXEL_PACKED,
        .depth = 5,
        .x_chroma_shift = 0, .y_chroma_shift = 0,
    },
    [PIX_FMT_RGB555] = {
        .name = "rgb555",
        .nb_channels = 4, .is_alpha = 1,
        .color_type = FF_COLOR_RGB,
        .pixel_type = FF_PIXEL_PACKED,
        .depth = 5,
        .x_chroma_shift = 0, .y_chroma_shift = 0,
    },

    /* gray / mono formats */
    [PIX_FMT_GRAY8] = {
        .name = "gray",
        .nb_channels = 1,
        .color_type = FF_COLOR_GRAY,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 8,
    },
    [PIX_FMT_MONOWHITE] = {
        .name = "monow",
        .nb_channels = 1,
        .color_type = FF_COLOR_GRAY,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 1,
    },
    [PIX_FMT_MONOBLACK] = {
        .name = "monob",
        .nb_channels = 1,
        .color_type = FF_COLOR_GRAY,
        .pixel_type = FF_PIXEL_PLANAR,
        .depth = 1,
    },

    /* paletted formats */
    [PIX_FMT_PAL8] = {
        .name = "pal8",
        .nb_channels = 4, .is_alpha = 1,
        .color_type = FF_COLOR_RGB,
        .pixel_type = FF_PIXEL_PALETTE,
        .depth = 8,
    },
    [PIX_FMT_XVMC_MPEG2_MC] = {
        .name = "xvmcmc",
    },
    [PIX_FMT_XVMC_MPEG2_IDCT] = {
        .name = "xvmcidct",
    },
    [PIX_FMT_UYVY411] = {
        .name = "uyvy411",
        .nb_channels = 1,
        .color_type = FF_COLOR_YUV,
        .pixel_type = FF_PIXEL_PACKED,
        .depth = 8,
        .x_chroma_shift = 2, .y_chroma_shift = 0,
    },
};
#else
;

void avpicture_init_pixfmtinfo(void)
{
 pix_fmt_info[PIX_FMT_YUV420P].name = "yuv420p";
 pix_fmt_info[PIX_FMT_YUV420P].nb_channels = 3;
 pix_fmt_info[PIX_FMT_YUV420P].color_type = FF_COLOR_YUV;
 pix_fmt_info[PIX_FMT_YUV420P].pixel_type = FF_PIXEL_PLANAR;
 pix_fmt_info[PIX_FMT_YUV420P].depth = 8;
 pix_fmt_info[PIX_FMT_YUV420P].x_chroma_shift = 1;
 pix_fmt_info[PIX_FMT_YUV420P].y_chroma_shift = 1; 

 pix_fmt_info[PIX_FMT_YUV422P].name = "yuv422p";
 pix_fmt_info[PIX_FMT_YUV422P].nb_channels = 3;
 pix_fmt_info[PIX_FMT_YUV422P].color_type = FF_COLOR_YUV;
 pix_fmt_info[PIX_FMT_YUV422P].pixel_type = FF_PIXEL_PLANAR;
 pix_fmt_info[PIX_FMT_YUV422P].depth = 8,
 pix_fmt_info[PIX_FMT_YUV422P].x_chroma_shift = 1;
 pix_fmt_info[PIX_FMT_YUV422P].y_chroma_shift = 0;

 pix_fmt_info[PIX_FMT_YUV444P].name = "yuv444p";
 pix_fmt_info[PIX_FMT_YUV444P].nb_channels = 3;
 pix_fmt_info[PIX_FMT_YUV444P].color_type = FF_COLOR_YUV;
 pix_fmt_info[PIX_FMT_YUV444P].pixel_type = FF_PIXEL_PLANAR;
 pix_fmt_info[PIX_FMT_YUV444P].depth = 8;
 pix_fmt_info[PIX_FMT_YUV444P].x_chroma_shift = 0;
 pix_fmt_info[PIX_FMT_YUV444P].y_chroma_shift = 0;

 pix_fmt_info[PIX_FMT_YUV422].name = "yuv422";
 pix_fmt_info[PIX_FMT_YUV422].nb_channels = 1;
 pix_fmt_info[PIX_FMT_YUV422].color_type = FF_COLOR_YUV;
 pix_fmt_info[PIX_FMT_YUV422].pixel_type = FF_PIXEL_PACKED;
 pix_fmt_info[PIX_FMT_YUV422].depth = 8;
 pix_fmt_info[PIX_FMT_YUV422].x_chroma_shift = 1;
 pix_fmt_info[PIX_FMT_YUV422].y_chroma_shift = 0;

 pix_fmt_info[PIX_FMT_UYVY422].name = "uyvy422";
 pix_fmt_info[PIX_FMT_UYVY422].nb_channels = 1;
 pix_fmt_info[PIX_FMT_UYVY422].color_type = FF_COLOR_YUV;
 pix_fmt_info[PIX_FMT_UYVY422].pixel_type = FF_PIXEL_PACKED;
 pix_fmt_info[PIX_FMT_UYVY422].depth = 8;
 pix_fmt_info[PIX_FMT_UYVY422].x_chroma_shift = 1;
 pix_fmt_info[PIX_FMT_UYVY422].y_chroma_shift = 0;

 pix_fmt_info[PIX_FMT_YUV410P].name = "yuv410p";
 pix_fmt_info[PIX_FMT_YUV410P].nb_channels = 3;
 pix_fmt_info[PIX_FMT_YUV410P].color_type = FF_COLOR_YUV;
 pix_fmt_info[PIX_FMT_YUV410P].pixel_type = FF_PIXEL_PLANAR;
 pix_fmt_info[PIX_FMT_YUV410P].depth = 8;
 pix_fmt_info[PIX_FMT_YUV410P].x_chroma_shift = 2;
 pix_fmt_info[PIX_FMT_YUV410P].y_chroma_shift = 2;

 pix_fmt_info[PIX_FMT_YUV411P].name = "yuv411p";
 pix_fmt_info[PIX_FMT_YUV411P].nb_channels = 3;
 pix_fmt_info[PIX_FMT_YUV411P].color_type = FF_COLOR_YUV;
 pix_fmt_info[PIX_FMT_YUV411P].pixel_type = FF_PIXEL_PLANAR;
 pix_fmt_info[PIX_FMT_YUV411P].depth = 8;
 pix_fmt_info[PIX_FMT_YUV411P].x_chroma_shift = 2;
 pix_fmt_info[PIX_FMT_YUV411P].y_chroma_shift = 0;

 /* JPEG YUV */
 pix_fmt_info[PIX_FMT_YUVJ420P].name = "yuvj420p";
 pix_fmt_info[PIX_FMT_YUVJ420P].nb_channels = 3;