/*

 * 3GPP TS 26.245 Timed Text decoder

 * Copyright (c) 2012  Philip Langdale <philipl@overt.org>

 *

 * 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

 */

#include "avcodec.h"

#include "ass.h"

#include "libavutil/avstring.h"

#include "libavutil/common.h"

#include "libavutil/bprint.h"

#include "libavutil/intreadwrite.h"

#include "libavutil/mem.h"

#define STYLE_FLAG_BOLD         (1<<0)

#define STYLE_FLAG_ITALIC       (1<<1)

#define STYLE_FLAG_UNDERLINE    (1<<2)

#define BOX_SIZE_INITIAL    40

#define STYL_BOX   (1<<0)

#define HLIT_BOX   (1<<1)

#define HCLR_BOX   (1<<2)

#define TWRP_BOX   (1<<3)

#define BOTTOM_LEFT     1

#define BOTTOM_CENTER   2

#define BOTTOM_RIGHT    3

#define MIDDLE_LEFT     4

#define MIDDLE_CENTER   5

#define MIDDLE_RIGHT    6

#define TOP_LEFT        7

#define TOP_CENTER      8

#define TOP_RIGHT       9

typedef struct {

    char *font;

    int fontsize;

    int color;

    int back_color;

    int bold;

    int italic;

    int underline;

    int alignment;

} MovTextDefault;

typedef struct {

    uint16_t fontID;

    char *font;

} FontRecord;

typedef struct {

    uint16_t style_start;

    uint16_t style_end;

    uint8_t style_flag;

    uint8_t fontsize;

    uint16_t style_fontID;

} StyleBox;

typedef struct {

    uint16_t hlit_start;

    uint16_t hlit_end;

} HighlightBox;

typedef struct {

   uint8_t hlit_color[4];

} HilightcolorBox;

typedef struct {

    uint8_t wrap_flag;

} TextWrapBox;

typedef struct {

    StyleBox **s;

    StyleBox *s_temp;

    HighlightBox h;

    HilightcolorBox c;

    FontRecord **ftab;

    FontRecord *ftab_temp;

    TextWrapBox w;

    MovTextDefault d;

    uint8_t box_flags;

    uint16_t style_entries, ftab_entries;

    uint64_t tracksize;

    int size_var;

    int count_s, count_f;

    int readorder;

} MovTextContext;

typedef struct {

    uint32_t type;

    size_t base_size;

    int (*decode)(const uint8_t *tsmb, MovTextContext *m, AVPacket *avpkt);

} Box;

{

    int i;

        }

    }

{

    int i;

        }

    }

{

    int i, box_size, font_length;

    int8_t v_align, h_align;

    int style_fontID;

    StyleBox s_default;

    // Display Flags

    // Alignment

    }

    }

    }

    // Background Color

    // BoxRecord

    // StyleRecord

    // fontID

    // face-style-flags

    // fontsize

    // Primary color

    // FontRecord

    // FontRecord Size

    // ftab

        }

        }

        }

        }

        }

    }

    }

}

{

}

{

}

{

}

{

    int i;

    // A single style record is of length 12 bytes.

        }

        }

        }

        // text-color-rgba

    }

}

static const Box box_types[] = {

    { MKBETAG('s','t','y','l'), 2, decode_styl },

    { MKBETAG('h','l','i','t'), 4, decode_hlit },

    { MKBETAG('h','c','l','r'), 4, decode_hclr },

    { MKBETAG('t','w','r','p'), 1, decode_twrp }

};

const static size_t box_count = FF_ARRAY_ELEMS(box_types);

// Return byte length of the UTF-8 sequence starting at text[0]. 0 on error.

{

    uint32_t c;

}

                       AVCodecContext *avctx)

{

        } else {

        }

    }

        int len;

                }

            }

                    }

                }

            }

        }

                /* If hclr box is present, set the secondary color to the color

                 * specified. Otherwise, set primary color to white and secondary

                 * color to black. These colors will come from TextSampleModifier

                 * boxes in future and inverse video technique for highlight will

                 * be implemented.

                 */

                } else {

                }

            }

                } else {

                }

            }

        }

        }

            }

        }

    }

}

    /*

     * TODO: Handle the default text style.

     * NB: Most players ignore styles completely, with the result that

     * it's very common to find files where the default style is broken

     * and respecting it results in a worse experience than ignoring it.

     */

    int ret;

                                m->d.back_color, m->d.bold, m->d.italic,

                                m->d.underline, ASS_DEFAULT_BORDERSTYLE,

                                m->d.alignment);

    } else

}

                            void *data, int *got_sub_ptr, AVPacket *avpkt)

{

    int ret;

    AVBPrint buf;

    char *end;

    int text_length, tsmb_type, ret_tsmb;

    uint64_t tsmb_size;

    const uint8_t *tsmb;

    size_t i;

    /*

     * A packet of size two with value zero is an empty subtitle

     * used to mark the end of the previous non-empty subtitle.

     * We can just drop them here as we have duration information

     * already. If the value is non-zero, then it's technically a

     * bad packet.

     */

    /*

     * The first two bytes of the packet are the length of the text string

     * In complex cases, there are style descriptors appended to the string

     * so we can't just assume the packet size is the string size.

     */

    // Note that the spec recommends lines be no longer than 2048 characters.

            // A box is a minimum of 8 bytes.

            } else

            //size_var is equal to 8 or 16 depending on the size of box

            }

                }

            }

        }

    } else

}

{

}

{

}

AVCodec ff_movtext_decoder = {

    .name         = "mov_text",

    .long_name    = NULL_IF_CONFIG_SMALL("3GPP Timed Text subtitle"),

    .type         = AVMEDIA_TYPE_SUBTITLE,

    .id           = AV_CODEC_ID_MOV_TEXT,

    .priv_data_size = sizeof(MovTextContext),

    .init         = mov_text_init,

    .decode       = mov_text_decode_frame,

    .close        = mov_text_decode_close,

    .flush        = mov_text_flush,

};