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/*
* JPEG 2000 encoding support via OpenJPEG
* Copyright (c) 2011 Michael Bradshaw <mbradshaw@sorensonmedia.com>
*
* 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 encoder using libopenjpeg
*/

#define OPJ_STATIC
#include <openjpeg.h>

#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "internal.h"

typedef struct {
    AVClass *avclass;
    opj_image_t *image;
    opj_cparameters_t enc_params;
    opj_cinfo_t *compress;
    opj_event_mgr_t event_mgr;
    int format;
    int profile;
    int prog_order;
    int cinema_mode;
    int numresolution;
    int numlayers;
    int disto_alloc;
    int fixed_alloc;
    int fixed_quality;
} LibOpenJPEGContext;

static void error_callback(const char *msg, void *data)
{
    av_log(data, AV_LOG_ERROR, "%s\n", msg);
}

static void warning_callback(const char *msg, void *data)
{
    av_log(data, AV_LOG_WARNING, "%s\n", msg);
}

static void info_callback(const char *msg, void *data)
{
    av_log(data, AV_LOG_DEBUG, "%s\n", msg);
}

static opj_image_t *mj2_create_image(AVCodecContext *avctx, opj_cparameters_t *parameters)
{
    opj_image_cmptparm_t *cmptparm;
    opj_image_t *img;
    int i;
    int sub_dx[4];
    int sub_dy[4];
    int numcomps;
    OPJ_COLOR_SPACE color_space = CLRSPC_UNKNOWN;

    sub_dx[0] = sub_dx[3] = 1;
    sub_dy[0] = sub_dy[3] = 1;
    sub_dx[1] = sub_dx[2] = 1<<av_pix_fmt_descriptors[avctx->pix_fmt].log2_chroma_w;
    sub_dy[1] = sub_dy[2] = 1<<av_pix_fmt_descriptors[avctx->pix_fmt].log2_chroma_h;

    numcomps = av_pix_fmt_descriptors[avctx->pix_fmt].nb_components;

    switch (avctx->pix_fmt) {
    case PIX_FMT_GRAY8:
    case PIX_FMT_GRAY8A:
    case PIX_FMT_GRAY16:
        color_space = CLRSPC_GRAY;
        break;
    case PIX_FMT_RGB24:
    case PIX_FMT_RGBA:
    case PIX_FMT_RGB48:
    case PIX_FMT_RGBA64:
        color_space = CLRSPC_SRGB;
        break;
    case PIX_FMT_YUV410P:
    case PIX_FMT_YUV411P:
    case PIX_FMT_YUV420P:
    case PIX_FMT_YUV422P:
    case PIX_FMT_YUV440P:
    case PIX_FMT_YUV444P:
    case PIX_FMT_YUVA420P:
    case PIX_FMT_YUVA422P:
    case PIX_FMT_YUVA444P:
    case PIX_FMT_YUV420P9:
    case PIX_FMT_YUV422P9:
    case PIX_FMT_YUV444P9:
    case PIX_FMT_YUV420P10:
    case PIX_FMT_YUV422P10:
    case PIX_FMT_YUV444P10:
    case PIX_FMT_YUV420P12:
    case PIX_FMT_YUV422P12:
    case PIX_FMT_YUV444P12:
    case PIX_FMT_YUV420P14:
    case PIX_FMT_YUV422P14:
    case PIX_FMT_YUV444P14:
    case PIX_FMT_YUV420P16:
    case PIX_FMT_YUV422P16:
    case PIX_FMT_YUV444P16:
        color_space = CLRSPC_SYCC;
        break;
    default:
        av_log(avctx, AV_LOG_ERROR,
               "The requested pixel format '%s' is not supported\n",
               av_get_pix_fmt_name(avctx->pix_fmt));
        return NULL;
    }

    cmptparm = av_mallocz(numcomps * sizeof(*cmptparm));
    if (!cmptparm) {
        av_log(avctx, AV_LOG_ERROR, "Not enough memory\n");
        return NULL;
    }
    for (i = 0; i < numcomps; i++) {
        cmptparm[i].prec = av_pix_fmt_descriptors[avctx->pix_fmt].comp[i].depth_minus1 + 1;
        cmptparm[i].bpp = av_pix_fmt_descriptors[avctx->pix_fmt].comp[i].depth_minus1 + 1;
        cmptparm[i].sgnd = 0;
        cmptparm[i].dx = sub_dx[i];
        cmptparm[i].dy = sub_dy[i];
        cmptparm[i].w = avctx->width / sub_dx[i];
        cmptparm[i].h = avctx->height / sub_dy[i];
    }

    img = opj_image_create(numcomps, cmptparm, color_space);
    av_freep(&cmptparm);
    return img;
}

static av_cold int libopenjpeg_encode_init(AVCodecContext *avctx)
{
    LibOpenJPEGContext *ctx = avctx->priv_data;
    int err = AVERROR(ENOMEM);

    opj_set_default_encoder_parameters(&ctx->enc_params);

    ctx->enc_params.cp_rsiz = ctx->profile;
    ctx->enc_params.mode = !!avctx->global_quality;
    ctx->enc_params.cp_cinema = ctx->cinema_mode;
    ctx->enc_params.prog_order = ctx->prog_order;
    ctx->enc_params.numresolution = ctx->numresolution;
    ctx->enc_params.cp_disto_alloc = ctx->disto_alloc;
    ctx->enc_params.cp_fixed_alloc = ctx->fixed_alloc;
    ctx->enc_params.cp_fixed_quality = ctx->fixed_quality;
    ctx->enc_params.tcp_numlayers = ctx->numlayers;
    ctx->enc_params.tcp_rates[0] = FFMAX(avctx->compression_level, 0) * 2;

    ctx->compress = opj_create_compress(ctx->format);
    if (!ctx->compress) {
        av_log(avctx, AV_LOG_ERROR, "Error creating the compressor\n");
        return AVERROR(ENOMEM);
    }

    avctx->coded_frame = avcodec_alloc_frame();
    if (!avctx->coded_frame) {
        av_log(avctx, AV_LOG_ERROR, "Error allocating coded frame\n");
        goto fail;
    }

    ctx->image = mj2_create_image(avctx, &ctx->enc_params);
    if (!ctx->image) {
        av_log(avctx, AV_LOG_ERROR, "Error creating the mj2 image\n");
        err = AVERROR(EINVAL);
        goto fail;
    }

    memset(&ctx->event_mgr, 0, sizeof(opj_event_mgr_t));
    ctx->event_mgr.info_handler = info_callback;
    ctx->event_mgr.error_handler = error_callback;
    ctx->event_mgr.warning_handler = warning_callback;
    opj_set_event_mgr((opj_common_ptr)ctx->compress, &ctx->event_mgr, avctx);

    return 0;

fail:
    av_freep(&ctx->compress);
    av_freep(&avctx->coded_frame);
    return err;
}

static int libopenjpeg_copy_packed8(AVCodecContext *avctx, const AVFrame *frame, opj_image_t *image)
{
    int compno;
    int x;
    int y;
    int image_index;
    int frame_index;
    const int numcomps = image->numcomps;

    for (compno = 0; compno < numcomps; ++compno) {
        if (image->comps[compno].w > frame->linesize[0] / numcomps) {
            av_log(avctx, AV_LOG_ERROR, "Error: frame's linesize is too small for the image\n");
            return 0;
        }
    }

    for (compno = 0; compno < numcomps; ++compno) {
        for (y = 0; y < avctx->height; ++y) {
            image_index = y * avctx->width;
            frame_index = y * frame->linesize[0] + compno;
            for (x = 0; x < avctx->width; ++x) {
                image->comps[compno].data[image_index++] = frame->data[0][frame_index];
                frame_index += numcomps;
            }
        }
    }

    return 1;
}

static int libopenjpeg_copy_packed16(AVCodecContext *avctx, const AVFrame *frame, opj_image_t *image)
{
    int compno;
    int x;
    int y;
    int image_index;
    int frame_index;
    const int numcomps = image->numcomps;
    uint16_t *frame_ptr = (uint16_t*)frame->data[0];

    for (compno = 0; compno < numcomps; ++compno) {
        if (image->comps[compno].w > frame->linesize[0] / numcomps) {
            av_log(avctx, AV_LOG_ERROR, "Error: frame's linesize is too small for the image\n");
            return 0;
        }
    }

    for (compno = 0; compno < numcomps; ++compno) {
        for (y = 0; y < avctx->height; ++y) {
            image_index = y * avctx->width;
            frame_index = y * (frame->linesize[0] / 2) + compno;
            for (x = 0; x < avctx->width; ++x) {
                image->comps[compno].data[image_index++] = frame_ptr[frame_index];
                frame_index += numcomps;
            }
        }
    }

    return 1;
}

static int libopenjpeg_copy_unpacked8(AVCodecContext *avctx, const AVFrame *frame, opj_image_t *image)
{
    int compno;
    int x;
    int y;
    int width;
    int height;
    int image_index;
    int frame_index;
    const int numcomps = image->numcomps;

    for (compno = 0; compno < numcomps; ++compno) {
        if (image->comps[compno].w > frame->linesize[compno]) {
            av_log(avctx, AV_LOG_ERROR, "Error: frame's linesize is too small for the image\n");
            return 0;
        }
    }

    for (compno = 0; compno < numcomps; ++compno) {
        width = avctx->width / image->comps[compno].dx;
        height = avctx->height / image->comps[compno].dy;
        for (y = 0; y < height; ++y) {
            image_index = y * width;
            frame_index = y * frame->linesize[compno];
            for (x = 0; x < width; ++x)
                image->comps[compno].data[image_index++] = frame->data[compno][frame_index++];
        }
    }

    return 1;
}

static int libopenjpeg_copy_unpacked16(AVCodecContext *avctx, const AVFrame *frame, opj_image_t *image)
{
    int compno;
    int x;
    int y;
    int width;
    int height;
    int image_index;
    int frame_index;
    const int numcomps = image->numcomps;
    uint16_t *frame_ptr;

    for (compno = 0; compno < numcomps; ++compno) {
        if (image->comps[compno].w > frame->linesize[compno]) {
            av_log(avctx, AV_LOG_ERROR, "Error: frame's linesize is too small for the image\n");
            return 0;
        }
    }

    for (compno = 0; compno < numcomps; ++compno) {
        width = avctx->width / image->comps[compno].dx;
        height = avctx->height / image->comps[compno].dy;
        frame_ptr = (uint16_t*)frame->data[compno];
        for (y = 0; y < height; ++y) {
            image_index = y * width;
            frame_index = y * (frame->linesize[compno] / 2);
            for (x = 0; x < width; ++x)
                image->comps[compno].data[image_index++] = frame_ptr[frame_index++];
        }
    }

    return 1;
}

static int libopenjpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                                    const AVFrame *frame, int *got_packet)
{
    LibOpenJPEGContext *ctx = avctx->priv_data;
    opj_cinfo_t *compress = ctx->compress;
    opj_image_t *image = ctx->image;
    opj_cio_t *stream;
    int cpyresult = 0;
    int ret, len;

    // x0, y0 is the top left corner of the image
    // x1, y1 is the width, height of the reference grid
    image->x0 = 0;
    image->y0 = 0;
    image->x1 = (avctx->width - 1) * ctx->enc_params.subsampling_dx + 1;
    image->y1 = (avctx->height - 1) * ctx->enc_params.subsampling_dy + 1;

    switch (avctx->pix_fmt) {
    case PIX_FMT_RGB24:
    case PIX_FMT_RGBA:
    case PIX_FMT_GRAY8A:
        cpyresult = libopenjpeg_copy_packed8(avctx, frame, image);
        break;
    case PIX_FMT_RGB48:
    case PIX_FMT_RGBA64:
        cpyresult = libopenjpeg_copy_packed16(avctx, frame, image);
        break;
    case PIX_FMT_GRAY8:
    case PIX_FMT_YUV410P:
    case PIX_FMT_YUV411P:
    case PIX_FMT_YUV420P:
    case PIX_FMT_YUV422P:
    case PIX_FMT_YUV440P:
    case PIX_FMT_YUV444P:
    case PIX_FMT_YUVA420P:
    case PIX_FMT_YUVA422P:
    case PIX_FMT_YUVA444P:
        cpyresult = libopenjpeg_copy_unpacked8(avctx, frame, image);
        break;
    case PIX_FMT_GRAY16:
    case PIX_FMT_YUV420P9:
    case PIX_FMT_YUV422P9:
    case PIX_FMT_YUV444P9:
    case PIX_FMT_YUV444P10:
    case PIX_FMT_YUV422P10:
    case PIX_FMT_YUV420P10:
    case PIX_FMT_YUV420P12:
    case PIX_FMT_YUV422P12:
    case PIX_FMT_YUV444P12:
    case PIX_FMT_YUV420P14:
    case PIX_FMT_YUV422P14:
    case PIX_FMT_YUV444P14:
    case PIX_FMT_YUV444P16:
    case PIX_FMT_YUV422P16:
    case PIX_FMT_YUV420P16:
        cpyresult = libopenjpeg_copy_unpacked16(avctx, frame, image);
        break;
    default:
        av_log(avctx, AV_LOG_ERROR,
               "The frame's pixel format '%s' is not supported\n",
               av_get_pix_fmt_name(avctx->pix_fmt));
        return AVERROR(EINVAL);
        break;
    }

    if (!cpyresult) {
        av_log(avctx, AV_LOG_ERROR,
               "Could not copy the frame data to the internal image buffer\n");
        return -1;
    }

    opj_setup_encoder(compress, &ctx->enc_params, image);
    stream = opj_cio_open((opj_common_ptr)compress, NULL, 0);
    if (!stream) {
        av_log(avctx, AV_LOG_ERROR, "Error creating the cio stream\n");
        return AVERROR(ENOMEM);
    }

    if (!opj_encode(compress, stream, image, NULL)) {
        opj_cio_close(stream);
        av_log(avctx, AV_LOG_ERROR, "Error during the opj encode\n");
        return -1;
    }

    len = cio_tell(stream);
    if ((ret = ff_alloc_packet2(avctx, pkt, len)) < 0) {
        opj_cio_close(stream);
        return ret;
    }

    memcpy(pkt->data, stream->buffer, len);
    pkt->flags |= AV_PKT_FLAG_KEY;
    *got_packet = 1;
    opj_cio_close(stream);
    return 0;
}

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

    opj_destroy_compress(ctx->compress);
    opj_image_destroy(ctx->image);
    av_freep(&avctx->coded_frame);
    return 0;
}

#define OFFSET(x) offsetof(LibOpenJPEGContext, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
    { "format", "Codec Format", OFFSET(format), AV_OPT_TYPE_INT, { .i64 = CODEC_JP2 }, CODEC_J2K, CODEC_JP2, VE, "format" },
    { "j2k", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CODEC_J2K }, 0, 0, VE, "format" },
    { "jp2", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CODEC_JP2 }, 0, 0, VE, "format" },
    { "profile", NULL, OFFSET(profile), AV_OPT_TYPE_INT, { .i64 = STD_RSIZ }, STD_RSIZ, CINEMA4K, VE, "profile" },
    { "jpeg2000", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = STD_RSIZ }, 0, 0, VE, "profile" },
    { "cinema2k", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CINEMA2K }, 0, 0, VE, "profile" },
    { "cinema4k", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CINEMA4K }, 0, 0, VE, "profile" },
    { "cinema_mode", "Digital Cinema", OFFSET(cinema_mode), AV_OPT_TYPE_INT, { .i64 = OFF }, OFF, CINEMA4K_24, VE, "cinema_mode" },
    { "off", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = OFF }, 0, 0, VE, "cinema_mode" },
    { "2k_24", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CINEMA2K_24 }, 0, 0, VE, "cinema_mode" },
    { "2k_48", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CINEMA2K_48 }, 0, 0, VE, "cinema_mode" },
    { "4k_24", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CINEMA4K_24 }, 0, 0, VE, "cinema_mode" },
    { "prog_order", "Progression Order", OFFSET(prog_order), AV_OPT_TYPE_INT, { .i64 = LRCP }, LRCP, CPRL, VE, "prog_order" },
    { "lrcp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LRCP }, 0, 0, VE, "prog_order" },
    { "rlcp", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = RLCP }, 0, 0, VE, "prog_order" },
    { "rpcl", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = RPCL }, 0, 0, VE, "prog_order" },
    { "pcrl", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PCRL }, 0, 0, VE, "prog_order" },
    { "cprl", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = CPRL }, 0, 0, VE, "prog_order" },
    { "numresolution", NULL, OFFSET(numresolution), AV_OPT_TYPE_INT, { .i64 = 6 }, 1, INT_MAX, VE },
    { "numlayers", NULL, OFFSET(numlayers), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 10, VE },
    { "disto_alloc", NULL, OFFSET(disto_alloc), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE },
    { "fixed_alloc", NULL, OFFSET(fixed_alloc), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
    { "fixed_quality", NULL, OFFSET(fixed_quality), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
    { NULL },
};

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

AVCodec ff_libopenjpeg_encoder = {
    .name = "libopenjpeg",
    .type = AVMEDIA_TYPE_VIDEO,
    .id = AV_CODEC_ID_JPEG2000,
    .priv_data_size = sizeof(LibOpenJPEGContext),
    .init = libopenjpeg_encode_init,
    .encode2 = libopenjpeg_encode_frame,
    .close = libopenjpeg_encode_close,
    .capabilities = 0,
    .pix_fmts = (const enum PixelFormat[]) {
        PIX_FMT_RGB24, PIX_FMT_RGBA, PIX_FMT_RGB48, PIX_FMT_RGBA64,
        PIX_FMT_GRAY8, PIX_FMT_GRAY8A, PIX_FMT_GRAY16,
        PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_YUVA420P,
        PIX_FMT_YUV440P, PIX_FMT_YUV444P, PIX_FMT_YUVA422P,
        PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_YUVA444P,
        PIX_FMT_YUV420P9, PIX_FMT_YUV422P9, PIX_FMT_YUV444P9,
        PIX_FMT_YUV420P10, PIX_FMT_YUV422P10, PIX_FMT_YUV444P10,
        PIX_FMT_YUV420P12, PIX_FMT_YUV422P12, PIX_FMT_YUV444P12,
        PIX_FMT_YUV420P14, PIX_FMT_YUV422P14, PIX_FMT_YUV444P14,
        PIX_FMT_YUV420P16, PIX_FMT_YUV422P16, PIX_FMT_YUV444P16,
        PIX_FMT_NONE
    },
    .long_name = NULL_IF_CONFIG_SMALL("OpenJPEG JPEG 2000"),
    .priv_class = &class,
};
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