[deb_ffmpeg.git] / ffmpeg / libavcodec / libopenjpegdec.c

/*
 * JPEG 2000 decoding support via OpenJPEG
 * Copyright (c) 2009 Jaikrishnan Menon <realityman@gmx.net>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg 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 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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 FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * JPEG 2000 decoder using libopenjpeg
 */

#define  OPJ_STATIC

#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/pixfmt.h"

#include "avcodec.h"
#include "internal.h"
#include "thread.h"

#if HAVE_OPENJPEG_1_5_OPENJPEG_H
# include <openjpeg-1.5/openjpeg.h>
#else
# include <openjpeg.h>
#endif

#define JP2_SIG_TYPE    0x6A502020
#define JP2_SIG_VALUE   0x0D0A870A

// pix_fmts with lower bpp have to be listed before
// similar pix_fmts with higher bpp.
#define RGB_PIXEL_FORMATS  AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA,                 \
                           AV_PIX_FMT_RGB48, AV_PIX_FMT_RGBA64

#define GRAY_PIXEL_FORMATS AV_PIX_FMT_GRAY8, AV_PIX_FMT_YA8,                  \
                           AV_PIX_FMT_GRAY16

#define YUV_PIXEL_FORMATS  AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVA420P, \
                           AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P, \
                           AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, \
                           AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, \
                           AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, \
                           AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, \
                           AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, \
                           AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, \
                           AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, \
                           AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, \
                           AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16

#define XYZ_PIXEL_FORMATS  AV_PIX_FMT_XYZ12

static const enum AVPixelFormat libopenjpeg_rgb_pix_fmts[]  = {
    RGB_PIXEL_FORMATS
};
static const enum AVPixelFormat libopenjpeg_gray_pix_fmts[] = {
    GRAY_PIXEL_FORMATS
};
static const enum AVPixelFormat libopenjpeg_yuv_pix_fmts[]  = {
    YUV_PIXEL_FORMATS
};
static const enum AVPixelFormat libopenjpeg_all_pix_fmts[]  = {
    RGB_PIXEL_FORMATS, GRAY_PIXEL_FORMATS, YUV_PIXEL_FORMATS, XYZ_PIXEL_FORMATS
};

typedef struct {
    AVClass *class;
    opj_dparameters_t dec_params;
    int lowqual;
} LibOpenJPEGContext;

static inline int libopenjpeg_matches_pix_fmt(const opj_image_t *image, enum AVPixelFormat pix_fmt)
{
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
    int match = 1;

    if (desc->nb_components != image->numcomps) {
        return 0;
    }

    switch (desc->nb_components) {
    case 4:
        match = match &&
                desc->comp[3].depth_minus1 + 1 >= image->comps[3].prec &&
                1 == image->comps[3].dx &&
                1 == image->comps[3].dy;
    case 3:
        match = match &&
                desc->comp[2].depth_minus1 + 1 >= image->comps[2].prec &&
                1 << desc->log2_chroma_w == image->comps[2].dx &&
                1 << desc->log2_chroma_h == image->comps[2].dy;
    case 2:
        match = match &&
                desc->comp[1].depth_minus1 + 1 >= image->comps[1].prec &&
                1 << desc->log2_chroma_w == image->comps[1].dx &&
                1 << desc->log2_chroma_h == image->comps[1].dy;
    case 1:
        match = match &&
                desc->comp[0].depth_minus1 + 1 >= image->comps[0].prec &&
                1 == image->comps[0].dx &&
                1 == image->comps[0].dy;
    default:
        break;
    }

    return match;
}

static inline enum AVPixelFormat libopenjpeg_guess_pix_fmt(const opj_image_t *image) {
    int index;
    const enum AVPixelFormat *possible_fmts = NULL;
    int possible_fmts_nb = 0;

    switch (image->color_space) {
    case CLRSPC_SRGB:
        possible_fmts    = libopenjpeg_rgb_pix_fmts;
        possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_rgb_pix_fmts);
        break;
    case CLRSPC_GRAY:
        possible_fmts    = libopenjpeg_gray_pix_fmts;
        possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_gray_pix_fmts);
        break;
    case CLRSPC_SYCC:
        possible_fmts    = libopenjpeg_yuv_pix_fmts;
        possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_yuv_pix_fmts);
        break;
    default:
        possible_fmts    = libopenjpeg_all_pix_fmts;
        possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_all_pix_fmts);
        break;
    }

    for (index = 0; index < possible_fmts_nb; ++index)
        if (libopenjpeg_matches_pix_fmt(image, possible_fmts[index])) {
            return possible_fmts[index];
        }

    return AV_PIX_FMT_NONE;
}

static inline int libopenjpeg_ispacked(enum AVPixelFormat pix_fmt)
{
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
    int i, component_plane;

    if (pix_fmt == AV_PIX_FMT_GRAY16)
        return 0;

    component_plane = desc->comp[0].plane;
    for (i = 1; i < desc->nb_components; i++)
        if (component_plane != desc->comp[i].plane)
            return 0;
    return 1;
}

static inline void libopenjpeg_copy_to_packed8(AVFrame *picture, opj_image_t *image) {
    uint8_t *img_ptr;
    int index, x, y, c;
    for (y = 0; y < picture->height; y++) {
        index   = y * picture->width;
        img_ptr = picture->data[0] + y * picture->linesize[0];
        for (x = 0; x < picture->width; x++, index++)
            for (c = 0; c < image->numcomps; c++)
                *img_ptr++ = 0x80 * image->comps[c].sgnd + image->comps[c].data[index];
    }
}

static inline void libopenjpeg_copy_to_packed16(AVFrame *picture, opj_image_t *image) {
    uint16_t *img_ptr;
    int index, x, y, c;
    int adjust[4];
    for (x = 0; x < image->numcomps; x++)
        adjust[x] = FFMAX(FFMIN(av_pix_fmt_desc_get(picture->format)->comp[x].depth_minus1 + 1 - image->comps[x].prec, 8), 0);

    for (y = 0; y < picture->height; y++) {
        index   = y * picture->width;
        img_ptr = (uint16_t *) (picture->data[0] + y * picture->linesize[0]);
        for (x = 0; x < picture->width; x++, index++)
            for (c = 0; c < image->numcomps; c++)
                *img_ptr++ = (1 << image->comps[c].prec - 1) * image->comps[c].sgnd +
                             (unsigned)image->comps[c].data[index] << adjust[c];
    }
}

static inline void libopenjpeg_copyto8(AVFrame *picture, opj_image_t *image) {
    int *comp_data;
    uint8_t *img_ptr;
    int index, x, y;

    for (index = 0; index < image->numcomps; index++) {
        comp_data = image->comps[index].data;
        for (y = 0; y < image->comps[index].h; y++) {
            img_ptr = picture->data[index] + y * picture->linesize[index];
            for (x = 0; x < image->comps[index].w; x++) {
                *img_ptr = 0x80 * image->comps[index].sgnd + *comp_data;
                img_ptr++;
                comp_data++;
            }
        }
    }
}

static inline void libopenjpeg_copyto16(AVFrame *picture, opj_image_t *image) {
    int *comp_data;
    uint16_t *img_ptr;
    int index, x, y;
    int adjust[4];
    for (x = 0; x < image->numcomps; x++)
        adjust[x] = FFMAX(FFMIN(av_pix_fmt_desc_get(picture->format)->comp[x].depth_minus1 + 1 - image->comps[x].prec, 8), 0);

    for (index = 0; index < image->numcomps; index++) {
        comp_data = image->comps[index].data;
        for (y = 0; y < image->comps[index].h; y++) {
            img_ptr = (uint16_t *)(picture->data[index] + y * picture->linesize[index]);
            for (x = 0; x < image->comps[index].w; x++) {
                *img_ptr = (1 << image->comps[index].prec - 1) * image->comps[index].sgnd +
                           (unsigned)*comp_data << adjust[index];
                img_ptr++;
                comp_data++;
            }
        }
    }
}

static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx)
{
    LibOpenJPEGContext *ctx = avctx->priv_data;

    opj_set_default_decoder_parameters(&ctx->dec_params);
    return 0;
}

static int libopenjpeg_decode_frame(AVCodecContext *avctx,
                                    void *data, int *got_frame,
                                    AVPacket *avpkt)
{
    uint8_t *buf            = avpkt->data;
    int buf_size            = avpkt->size;
    LibOpenJPEGContext *ctx = avctx->priv_data;
    ThreadFrame frame       = { .f = data };
    AVFrame *picture        = data;
    const AVPixFmtDescriptor *desc;
    opj_dinfo_t *dec;
    opj_cio_t *stream;
    opj_image_t *image;
    int width, height, ret;
    int pixel_size = 0;
    int ispacked   = 0;
    int i;

    *got_frame = 0;

    // Check if input is a raw jpeg2k codestream or in jp2 wrapping
    if ((AV_RB32(buf) == 12) &&
        (AV_RB32(buf + 4) == JP2_SIG_TYPE) &&
        (AV_RB32(buf + 8) == JP2_SIG_VALUE)) {
        dec = opj_create_decompress(CODEC_JP2);
    } else {
        /* If the AVPacket contains a jp2c box, then skip to
         * the starting byte of the codestream. */
        if (AV_RB32(buf + 4) == AV_RB32("jp2c"))
            buf += 8;
        dec = opj_create_decompress(CODEC_J2K);
    }

    if (!dec) {
        av_log(avctx, AV_LOG_ERROR, "Error initializing decoder.\n");
        return AVERROR_UNKNOWN;
    }
    opj_set_event_mgr((opj_common_ptr) dec, NULL, NULL);
    ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER;
    ctx->dec_params.cp_layer          = ctx->lowqual;
    // Tie decoder with decoding parameters
    opj_setup_decoder(dec, &ctx->dec_params);
    stream = opj_cio_open((opj_common_ptr) dec, buf, buf_size);

    if (!stream) {
        av_log(avctx, AV_LOG_ERROR,
               "Codestream could not be opened for reading.\n");
        opj_destroy_decompress(dec);
        return AVERROR_UNKNOWN;
    }

    // Decode the header only.
    image = opj_decode_with_info(dec, stream, NULL);
    opj_cio_close(stream);

    if (!image) {
        av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");
        opj_destroy_decompress(dec);
        return AVERROR_UNKNOWN;
    }

    width  = image->x1 - image->x0;
    height = image->y1 - image->y0;

    ret = ff_set_dimensions(avctx, width, height);
    if (ret < 0)
        goto done;

    if (avctx->pix_fmt != AV_PIX_FMT_NONE)
        if (!libopenjpeg_matches_pix_fmt(image, avctx->pix_fmt))
            avctx->pix_fmt = AV_PIX_FMT_NONE;

    if (avctx->pix_fmt == AV_PIX_FMT_NONE)
        avctx->pix_fmt = libopenjpeg_guess_pix_fmt(image);

    if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
        av_log(avctx, AV_LOG_ERROR, "Unable to determine pixel format\n");
        goto done;
    }
    for (i = 0; i < image->numcomps; i++)
        if (image->comps[i].prec > avctx->bits_per_raw_sample)
            avctx->bits_per_raw_sample = image->comps[i].prec;

    if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
        goto done;

    ctx->dec_params.cp_limit_decoding = NO_LIMITATION;
    ctx->dec_params.cp_reduce = avctx->lowres;
    // Tie decoder with decoding parameters.
    opj_setup_decoder(dec, &ctx->dec_params);
    stream = opj_cio_open((opj_common_ptr) dec, buf, buf_size);
    if (!stream) {
        av_log(avctx, AV_LOG_ERROR,
               "Codestream could not be opened for reading.\n");
        ret = AVERROR_UNKNOWN;
        goto done;
    }

    opj_image_destroy(image);
    // Decode the codestream
    image = opj_decode_with_info(dec, stream, NULL);
    opj_cio_close(stream);

    if (!image) {
        av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");
        ret = AVERROR_UNKNOWN;
        goto done;
    }

    desc       = av_pix_fmt_desc_get(avctx->pix_fmt);
    pixel_size = desc->comp[0].step_minus1 + 1;
    ispacked   = libopenjpeg_ispacked(avctx->pix_fmt);

    switch (pixel_size) {
    case 1:
        if (ispacked) {
            libopenjpeg_copy_to_packed8(picture, image);
        } else {
            libopenjpeg_copyto8(picture, image);
        }
        break;
    case 2:
        if (ispacked) {
            libopenjpeg_copy_to_packed8(picture, image);
        } else {
            libopenjpeg_copyto16(picture, image);
        }
        break;
    case 3:
    case 4:
        if (ispacked) {
            libopenjpeg_copy_to_packed8(picture, image);
        }
        break;
    case 6:
    case 8:
        if (ispacked) {
            libopenjpeg_copy_to_packed16(picture, image);
        }
        break;
    default:
        av_log(avctx, AV_LOG_ERROR, "unsupported pixel size %d\n", pixel_size);
        ret = AVERROR_PATCHWELCOME;
        goto done;
    }

    *got_frame = 1;
    ret        = buf_size;

done:
    opj_image_destroy(image);
    opj_destroy_decompress(dec);
    return ret;
}

#define OFFSET(x) offsetof(LibOpenJPEGContext, x)
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM

static const AVOption options[] = {
    { "lowqual", "Limit the number of layers used for decoding",
        OFFSET(lowqual), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VD },
    { NULL },
};

static const AVClass openjpeg_class = {
    .class_name = "libopenjpeg",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
};

AVCodec ff_libopenjpeg_decoder = {
    .name           = "libopenjpeg",
    .long_name      = NULL_IF_CONFIG_SMALL("OpenJPEG JPEG 2000"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_JPEG2000,
    .priv_data_size = sizeof(LibOpenJPEGContext),
    .init           = libopenjpeg_decode_init,
    .decode         = libopenjpeg_decode_frame,
    .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS,
    .max_lowres     = 31,
    .priv_class     = &openjpeg_class,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* JPEG 2000 decoding support via OpenJPEG
	3	* Copyright (c) 2009 Jaikrishnan Menon <realityman@gmx.net>
	4	*
	5	* This file is part of FFmpeg.
	6	*
	7	* FFmpeg is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2.1 of the License, or (at your option) any later version.
	11	*
	12	* FFmpeg is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
	18	* License along with FFmpeg; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21
	22	/**
	23	* @file
	24	* JPEG 2000 decoder using libopenjpeg
	25	*/
	26
	27	#define OPJ_STATIC
	28
	29	#include "libavutil/common.h"
	30	#include "libavutil/imgutils.h"
	31	#include "libavutil/intreadwrite.h"
	32	#include "libavutil/opt.h"
	33	#include "libavutil/pixfmt.h"
	34
	35	#include "avcodec.h"
	36	#include "internal.h"
	37	#include "thread.h"
	38
	39	#if HAVE_OPENJPEG_1_5_OPENJPEG_H
	40	# include <openjpeg-1.5/openjpeg.h>
	41	#else
	42	# include <openjpeg.h>
	43	#endif
	44
	45	#define JP2_SIG_TYPE 0x6A502020
	46	#define JP2_SIG_VALUE 0x0D0A870A
	47
	48	// pix_fmts with lower bpp have to be listed before
	49	// similar pix_fmts with higher bpp.
	50	#define RGB_PIXEL_FORMATS AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, \
	51	AV_PIX_FMT_RGB48, AV_PIX_FMT_RGBA64
	52
	53	#define GRAY_PIXEL_FORMATS AV_PIX_FMT_GRAY8, AV_PIX_FMT_YA8, \
	54	AV_PIX_FMT_GRAY16
	55
	56	#define YUV_PIXEL_FORMATS AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVA420P, \
	57	AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P, \
	58	AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, \
	59	AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, \
	60	AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, \
	61	AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, \
	62	AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, \
	63	AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, \
	64	AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, \
65	AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, \
66	AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16
67
68	#define XYZ_PIXEL_FORMATS AV_PIX_FMT_XYZ12
69
70	static const enum AVPixelFormat libopenjpeg_rgb_pix_fmts[] = {
71	RGB_PIXEL_FORMATS
72	};
73	static const enum AVPixelFormat libopenjpeg_gray_pix_fmts[] = {
74	GRAY_PIXEL_FORMATS
75	};
76	static const enum AVPixelFormat libopenjpeg_yuv_pix_fmts[] = {
77	YUV_PIXEL_FORMATS
78	};
79	static const enum AVPixelFormat libopenjpeg_all_pix_fmts[] = {
80	RGB_PIXEL_FORMATS, GRAY_PIXEL_FORMATS, YUV_PIXEL_FORMATS, XYZ_PIXEL_FORMATS
81	};
82
83	typedef struct {
84	AVClass *class;
85	opj_dparameters_t dec_params;
86	int lowqual;
87	} LibOpenJPEGContext;
88
89	static inline int libopenjpeg_matches_pix_fmt(const opj_image_t *image, enum AVPixelFormat pix_fmt)
90	{
91	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
92	int match = 1;
93
94	if (desc->nb_components != image->numcomps) {
95	return 0;
96	}
97
98	switch (desc->nb_components) {
99	case 4:
100	match = match &&
101	desc->comp[3].depth_minus1 + 1 >= image->comps[3].prec &&
102	1 == image->comps[3].dx &&
103	1 == image->comps[3].dy;
104	case 3:
105	match = match &&
106	desc->comp[2].depth_minus1 + 1 >= image->comps[2].prec &&
107	1 << desc->log2_chroma_w == image->comps[2].dx &&
108	1 << desc->log2_chroma_h == image->comps[2].dy;
109	case 2:
110	match = match &&
111	desc->comp[1].depth_minus1 + 1 >= image->comps[1].prec &&
112	1 << desc->log2_chroma_w == image->comps[1].dx &&
113	1 << desc->log2_chroma_h == image->comps[1].dy;
114	case 1:
115	match = match &&
116	desc->comp[0].depth_minus1 + 1 >= image->comps[0].prec &&
117	1 == image->comps[0].dx &&
118	1 == image->comps[0].dy;
119	default:
120	break;
121	}
122
123	return match;
124	}
125
126	static inline enum AVPixelFormat libopenjpeg_guess_pix_fmt(const opj_image_t *image) {
127	int index;
128	const enum AVPixelFormat *possible_fmts = NULL;
129	int possible_fmts_nb = 0;
130
131	switch (image->color_space) {
132	case CLRSPC_SRGB:
133	possible_fmts = libopenjpeg_rgb_pix_fmts;
134	possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_rgb_pix_fmts);
135	break;
136	case CLRSPC_GRAY:
137	possible_fmts = libopenjpeg_gray_pix_fmts;
138	possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_gray_pix_fmts);
139	break;
140	case CLRSPC_SYCC:
141	possible_fmts = libopenjpeg_yuv_pix_fmts;
142	possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_yuv_pix_fmts);
143	break;
144	default:
145	possible_fmts = libopenjpeg_all_pix_fmts;
146	possible_fmts_nb = FF_ARRAY_ELEMS(libopenjpeg_all_pix_fmts);
147	break;
148	}
149
150	for (index = 0; index < possible_fmts_nb; ++index)
151	if (libopenjpeg_matches_pix_fmt(image, possible_fmts[index])) {
152	return possible_fmts[index];
153	}
154
155	return AV_PIX_FMT_NONE;
156	}
157
158	static inline int libopenjpeg_ispacked(enum AVPixelFormat pix_fmt)
159	{
160	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
161	int i, component_plane;
162
163	if (pix_fmt == AV_PIX_FMT_GRAY16)
164	return 0;
165
166	component_plane = desc->comp[0].plane;
167	for (i = 1; i < desc->nb_components; i++)
168	if (component_plane != desc->comp[i].plane)
169	return 0;
170	return 1;
171	}
172
173	static inline void libopenjpeg_copy_to_packed8(AVFrame picture, opj_image_t image) {
174	uint8_t *img_ptr;
175	int index, x, y, c;
176	for (y = 0; y < picture->height; y++) {
177	index = y * picture->width;
178	img_ptr = picture->data[0] + y * picture->linesize[0];
179	for (x = 0; x < picture->width; x++, index++)
180	for (c = 0; c < image->numcomps; c++)
181	img_ptr++ = 0x80 image->comps[c].sgnd + image->comps[c].data[index];
182	}
183	}
184
185	static inline void libopenjpeg_copy_to_packed16(AVFrame picture, opj_image_t image) {
186	uint16_t *img_ptr;
187	int index, x, y, c;
188	int adjust[4];
189	for (x = 0; x < image->numcomps; x++)
190	adjust[x] = FFMAX(FFMIN(av_pix_fmt_desc_get(picture->format)->comp[x].depth_minus1 + 1 - image->comps[x].prec, 8), 0);
191
192	for (y = 0; y < picture->height; y++) {
193	index = y * picture->width;
194	img_ptr = (uint16_t ) (picture->data[0] + y picture->linesize[0]);
195	for (x = 0; x < picture->width; x++, index++)
196	for (c = 0; c < image->numcomps; c++)
197	img_ptr++ = (1 << image->comps[c].prec - 1) image->comps[c].sgnd +
198	(unsigned)image->comps[c].data[index] << adjust[c];
199	}
200	}
201
202	static inline void libopenjpeg_copyto8(AVFrame picture, opj_image_t image) {
203	int *comp_data;
204	uint8_t *img_ptr;
205	int index, x, y;
206
207	for (index = 0; index < image->numcomps; index++) {
208	comp_data = image->comps[index].data;
209	for (y = 0; y < image->comps[index].h; y++) {
210	img_ptr = picture->data[index] + y * picture->linesize[index];
211	for (x = 0; x < image->comps[index].w; x++) {
212	img_ptr = 0x80 image->comps[index].sgnd + *comp_data;
213	img_ptr++;
214	comp_data++;
215	}
216	}
217	}
218	}
219
220	static inline void libopenjpeg_copyto16(AVFrame picture, opj_image_t image) {
221	int *comp_data;
222	uint16_t *img_ptr;
223	int index, x, y;
224	int adjust[4];
225	for (x = 0; x < image->numcomps; x++)
226	adjust[x] = FFMAX(FFMIN(av_pix_fmt_desc_get(picture->format)->comp[x].depth_minus1 + 1 - image->comps[x].prec, 8), 0);
227
228	for (index = 0; index < image->numcomps; index++) {
229	comp_data = image->comps[index].data;
230	for (y = 0; y < image->comps[index].h; y++) {
231	img_ptr = (uint16_t )(picture->data[index] + y picture->linesize[index]);
232	for (x = 0; x < image->comps[index].w; x++) {
233	img_ptr = (1 << image->comps[index].prec - 1) image->comps[index].sgnd +
234	(unsigned)*comp_data << adjust[index];
235	img_ptr++;
236	comp_data++;
237	}
238	}
239	}
240	}
241
242	static av_cold int libopenjpeg_decode_init(AVCodecContext *avctx)
243	{
244	LibOpenJPEGContext *ctx = avctx->priv_data;
245
246	opj_set_default_decoder_parameters(&ctx->dec_params);
247	return 0;
248	}
249
250	static int libopenjpeg_decode_frame(AVCodecContext *avctx,
251	void data, int got_frame,
252	AVPacket *avpkt)
253	{
254	uint8_t *buf = avpkt->data;
255	int buf_size = avpkt->size;
256	LibOpenJPEGContext *ctx = avctx->priv_data;
257	ThreadFrame frame = { .f = data };
258	AVFrame *picture = data;
259	const AVPixFmtDescriptor *desc;
260	opj_dinfo_t *dec;
261	opj_cio_t *stream;
262	opj_image_t *image;
263	int width, height, ret;
264	int pixel_size = 0;
265	int ispacked = 0;
266	int i;
267
268	*got_frame = 0;
269
270	// Check if input is a raw jpeg2k codestream or in jp2 wrapping
271	if ((AV_RB32(buf) == 12) &&
272	(AV_RB32(buf + 4) == JP2_SIG_TYPE) &&
273	(AV_RB32(buf + 8) == JP2_SIG_VALUE)) {
274	dec = opj_create_decompress(CODEC_JP2);
275	} else {
276	/* If the AVPacket contains a jp2c box, then skip to
277	* the starting byte of the codestream. */
278	if (AV_RB32(buf + 4) == AV_RB32("jp2c"))
279	buf += 8;
280	dec = opj_create_decompress(CODEC_J2K);
281	}
282
283	if (!dec) {
284	av_log(avctx, AV_LOG_ERROR, "Error initializing decoder.\n");
285	return AVERROR_UNKNOWN;
286	}
287	opj_set_event_mgr((opj_common_ptr) dec, NULL, NULL);
288	ctx->dec_params.cp_limit_decoding = LIMIT_TO_MAIN_HEADER;
289	ctx->dec_params.cp_layer = ctx->lowqual;
290	// Tie decoder with decoding parameters
291	opj_setup_decoder(dec, &ctx->dec_params);
292	stream = opj_cio_open((opj_common_ptr) dec, buf, buf_size);
293
294	if (!stream) {
295	av_log(avctx, AV_LOG_ERROR,
296	"Codestream could not be opened for reading.\n");
297	opj_destroy_decompress(dec);
298	return AVERROR_UNKNOWN;
299	}
300
301	// Decode the header only.
302	image = opj_decode_with_info(dec, stream, NULL);
303	opj_cio_close(stream);
304
305	if (!image) {
306	av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");
307	opj_destroy_decompress(dec);
308	return AVERROR_UNKNOWN;
309	}
310
311	width = image->x1 - image->x0;
312	height = image->y1 - image->y0;
313
314	ret = ff_set_dimensions(avctx, width, height);
315	if (ret < 0)
316	goto done;
317
318	if (avctx->pix_fmt != AV_PIX_FMT_NONE)
319	if (!libopenjpeg_matches_pix_fmt(image, avctx->pix_fmt))
320	avctx->pix_fmt = AV_PIX_FMT_NONE;
321
322	if (avctx->pix_fmt == AV_PIX_FMT_NONE)
323	avctx->pix_fmt = libopenjpeg_guess_pix_fmt(image);
324
325	if (avctx->pix_fmt == AV_PIX_FMT_NONE) {
326	av_log(avctx, AV_LOG_ERROR, "Unable to determine pixel format\n");
327	goto done;
328	}
329	for (i = 0; i < image->numcomps; i++)
330	if (image->comps[i].prec > avctx->bits_per_raw_sample)
331	avctx->bits_per_raw_sample = image->comps[i].prec;
332
333	if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
334	goto done;
335
336	ctx->dec_params.cp_limit_decoding = NO_LIMITATION;
337	ctx->dec_params.cp_reduce = avctx->lowres;
338	// Tie decoder with decoding parameters.
339	opj_setup_decoder(dec, &ctx->dec_params);
340	stream = opj_cio_open((opj_common_ptr) dec, buf, buf_size);
341	if (!stream) {
342	av_log(avctx, AV_LOG_ERROR,
343	"Codestream could not be opened for reading.\n");
344	ret = AVERROR_UNKNOWN;
345	goto done;
346	}
347
348	opj_image_destroy(image);
349	// Decode the codestream
350	image = opj_decode_with_info(dec, stream, NULL);
351	opj_cio_close(stream);
352
353	if (!image) {
354	av_log(avctx, AV_LOG_ERROR, "Error decoding codestream.\n");
355	ret = AVERROR_UNKNOWN;
356	goto done;
357	}
358
359	desc = av_pix_fmt_desc_get(avctx->pix_fmt);
360	pixel_size = desc->comp[0].step_minus1 + 1;
361	ispacked = libopenjpeg_ispacked(avctx->pix_fmt);
362
363	switch (pixel_size) {
364	case 1:
365	if (ispacked) {
366	libopenjpeg_copy_to_packed8(picture, image);
367	} else {
368	libopenjpeg_copyto8(picture, image);
369	}
370	break;
371	case 2:
372	if (ispacked) {
373	libopenjpeg_copy_to_packed8(picture, image);
374	} else {
375	libopenjpeg_copyto16(picture, image);
376	}
377	break;
378	case 3:
379	case 4:
380	if (ispacked) {
381	libopenjpeg_copy_to_packed8(picture, image);
382	}
383	break;
384	case 6:
385	case 8:
386	if (ispacked) {
387	libopenjpeg_copy_to_packed16(picture, image);
388	}
389	break;
390	default:
391	av_log(avctx, AV_LOG_ERROR, "unsupported pixel size %d\n", pixel_size);
392	ret = AVERROR_PATCHWELCOME;
393	goto done;
394	}
395
396	*got_frame = 1;
397	ret = buf_size;
398
399	done:
400	opj_image_destroy(image);
401	opj_destroy_decompress(dec);
402	return ret;
403	}
404
405	#define OFFSET(x) offsetof(LibOpenJPEGContext, x)
406	#define VD AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_DECODING_PARAM
407
408	static const AVOption options[] = {
409	{ "lowqual", "Limit the number of layers used for decoding",
410	OFFSET(lowqual), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VD },
411	{ NULL },
412	};
413
414	static const AVClass openjpeg_class = {
415	.class_name = "libopenjpeg",
416	.item_name = av_default_item_name,
417	.option = options,
418	.version = LIBAVUTIL_VERSION_INT,
419	};
420
421	AVCodec ff_libopenjpeg_decoder = {
422	.name = "libopenjpeg",
423	.long_name = NULL_IF_CONFIG_SMALL("OpenJPEG JPEG 2000"),
424	.type = AVMEDIA_TYPE_VIDEO,
425	.id = AV_CODEC_ID_JPEG2000,
426	.priv_data_size = sizeof(LibOpenJPEGContext),
427	.init = libopenjpeg_decode_init,
428	.decode = libopenjpeg_decode_frame,
429	.capabilities = CODEC_CAP_DR1 \| CODEC_CAP_FRAME_THREADS,
430	.max_lowres = 31,
431	.priv_class = &openjpeg_class,
432	};