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/*
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 * Image format
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 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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 * Copyright (c) 2004 Michael Niedermayer
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg 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 GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "libavutil/intreadwrite.h"
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#include "libavutil/avstring.h"
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#include "avformat.h"
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#include <strings.h>
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typedef struct {
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    int img_first;
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    int img_last;
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    int img_number;
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    int img_count;
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    int is_pipe;
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    char path[1024];
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} VideoData;
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typedef struct {
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    enum CodecID id;
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    const char *str;
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} IdStrMap;
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static const IdStrMap img_tags[] = {
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    { CODEC_ID_MJPEG     , "jpeg"},
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    { CODEC_ID_MJPEG     , "jpg"},
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    { CODEC_ID_LJPEG     , "ljpg"},
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    { CODEC_ID_PNG       , "png"},
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    { CODEC_ID_PNG       , "mng"},
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    { CODEC_ID_PPM       , "ppm"},
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    { CODEC_ID_PPM       , "pnm"},
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    { CODEC_ID_PGM       , "pgm"},
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    { CODEC_ID_PGMYUV    , "pgmyuv"},
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    { CODEC_ID_PBM       , "pbm"},
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    { CODEC_ID_PAM       , "pam"},
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    { CODEC_ID_MPEG1VIDEO, "mpg1-img"},
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    { CODEC_ID_MPEG2VIDEO, "mpg2-img"},
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    { CODEC_ID_MPEG4     , "mpg4-img"},
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    { CODEC_ID_FFV1      , "ffv1-img"},
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    { CODEC_ID_RAWVIDEO  , "y"},
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    { CODEC_ID_BMP       , "bmp"},
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    { CODEC_ID_GIF       , "gif"},
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    { CODEC_ID_TARGA     , "tga"},
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    { CODEC_ID_TIFF      , "tiff"},
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    { CODEC_ID_TIFF      , "tif"},
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    { CODEC_ID_SGI       , "sgi"},
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    { CODEC_ID_PTX       , "ptx"},
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    { CODEC_ID_PCX       , "pcx"},
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    { CODEC_ID_SUNRAST   , "sun"},
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    { CODEC_ID_SUNRAST   , "ras"},
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    { CODEC_ID_SUNRAST   , "rs"},
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    { CODEC_ID_SUNRAST   , "im1"},
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    { CODEC_ID_SUNRAST   , "im8"},
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    { CODEC_ID_SUNRAST   , "im24"},
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    { CODEC_ID_SUNRAST   , "sunras"},
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    { CODEC_ID_JPEG2000  , "jp2"},
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    { CODEC_ID_NONE      , NULL}
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};
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static const int sizes[][2] = {
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    { 640, 480 },
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    { 720, 480 },
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    { 720, 576 },
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    { 352, 288 },
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    { 352, 240 },
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    { 160, 128 },
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    { 512, 384 },
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    { 640, 352 },
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    { 640, 240 },
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};
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static int infer_size(int *width_ptr, int *height_ptr, int size)
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{
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    int i;
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    for(i=0;i<FF_ARRAY_ELEMS(sizes);i++) {
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        if ((sizes[i][0] * sizes[i][1]) == size) {
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            *width_ptr = sizes[i][0];
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            *height_ptr = sizes[i][1];
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            return 0;
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        }
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    }
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    return -1;
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}
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static enum CodecID av_str2id(const IdStrMap *tags, const char *str)
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{
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    str= strrchr(str, '.');
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    if(!str) return CODEC_ID_NONE;
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    str++;
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    while (tags->id) {
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        if (!strcasecmp(str, tags->str))
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            return tags->id;
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        tags++;
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    }
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    return CODEC_ID_NONE;
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}
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/* return -1 if no image found */
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static int find_image_range(int *pfirst_index, int *plast_index,
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                            const char *path)
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{
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    char buf[1024];
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    int range, last_index, range1, first_index;
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    /* find the first image */
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    for(first_index = 0; first_index < 5; first_index++) {
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        if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0){
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            *pfirst_index =
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            *plast_index = 1;
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            return 0;
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        }
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        if (url_exist(buf))
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            break;
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    }
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    if (first_index == 5)
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        goto fail;
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    /* find the last image */
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    last_index = first_index;
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    for(;;) {
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        range = 0;
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        for(;;) {
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            if (!range)
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                range1 = 1;
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            else
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                range1 = 2 * range;
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            if (av_get_frame_filename(buf, sizeof(buf), path,
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                                      last_index + range1) < 0)
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                goto fail;
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            if (!url_exist(buf))
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                break;
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            range = range1;
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            /* just in case... */
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            if (range >= (1 << 30))
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                goto fail;
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        }
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        /* we are sure than image last_index + range exists */
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        if (!range)
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            break;
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        last_index += range;
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    }
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    *pfirst_index = first_index;
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    *plast_index = last_index;
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    return 0;
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 fail:
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    return -1;
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}
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static int image_probe(AVProbeData *p)
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{
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    if (p->filename && av_str2id(img_tags, p->filename)) {
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        if (av_filename_number_test(p->filename))
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            return AVPROBE_SCORE_MAX;
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        else
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            return AVPROBE_SCORE_MAX/2;
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    }
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    return 0;
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}
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enum CodecID av_guess_image2_codec(const char *filename){
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    return av_str2id(img_tags, filename);
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}
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static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
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{
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    VideoData *s = s1->priv_data;
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    int first_index, last_index;
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    AVStream *st;
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    s1->ctx_flags |= AVFMTCTX_NOHEADER;
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    st = av_new_stream(s1, 0);
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    if (!st) {
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        return AVERROR(ENOMEM);
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    }
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    av_strlcpy(s->path, s1->filename, sizeof(s->path));
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    s->img_number = 0;
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    s->img_count = 0;
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    /* find format */
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    if (s1->iformat->flags & AVFMT_NOFILE)
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        s->is_pipe = 0;
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    else{
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        s->is_pipe = 1;
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        st->need_parsing = AVSTREAM_PARSE_FULL;
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    }
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    if (!ap->time_base.num) {
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        av_set_pts_info(st, 60, 1, 25);
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    } else {
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        av_set_pts_info(st, 60, ap->time_base.num, ap->time_base.den);
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    }
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    if(ap->width && ap->height){
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        st->codec->width = ap->width;
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        st->codec->height= ap->height;
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    }
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    if (!s->is_pipe) {
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        if (find_image_range(&first_index, &last_index, s->path) < 0)
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            return AVERROR(EIO);
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        s->img_first = first_index;
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        s->img_last = last_index;
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        s->img_number = first_index;
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        /* compute duration */
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        st->start_time = 0;
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        st->duration = last_index - first_index + 1;
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    }
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    if(ap->video_codec_id){
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        st->codec->codec_type = CODEC_TYPE_VIDEO;
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        st->codec->codec_id = ap->video_codec_id;
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    }else if(ap->audio_codec_id){
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        st->codec->codec_type = CODEC_TYPE_AUDIO;
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        st->codec->codec_id = ap->audio_codec_id;
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    }else{
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        st->codec->codec_type = CODEC_TYPE_VIDEO;
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        st->codec->codec_id = av_str2id(img_tags, s->path);
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    }
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    if(st->codec->codec_type == CODEC_TYPE_VIDEO && ap->pix_fmt != PIX_FMT_NONE)
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        st->codec->pix_fmt = ap->pix_fmt;
244

    
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    return 0;
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}
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static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
249
{
250
    VideoData *s = s1->priv_data;
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    char filename[1024];
252
    int i;
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    int size[3]={0}, ret[3]={0};
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    ByteIOContext *f[3];
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    AVCodecContext *codec= s1->streams[0]->codec;
256

    
257
    if (!s->is_pipe) {
258
        /* loop over input */
259
        if (s1->loop_input && s->img_number > s->img_last) {
260
            s->img_number = s->img_first;
261
        }
262
        if (av_get_frame_filename(filename, sizeof(filename),
263
                                  s->path, s->img_number)<0 && s->img_number > 1)
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            return AVERROR(EIO);
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        for(i=0; i<3; i++){
266
            if (url_fopen(&f[i], filename, URL_RDONLY) < 0)
267
                return AVERROR(EIO);
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            size[i]= url_fsize(f[i]);
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270
            if(codec->codec_id != CODEC_ID_RAWVIDEO)
271
                break;
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            filename[ strlen(filename) - 1 ]= 'U' + i;
273
        }
274

    
275
        if(codec->codec_id == CODEC_ID_RAWVIDEO && !codec->width)
276
            infer_size(&codec->width, &codec->height, size[0]);
277
    } else {
278
        f[0] = s1->pb;
279
        if (url_feof(f[0]))
280
            return AVERROR(EIO);
281
        size[0]= 4096;
282
    }
283

    
284
    av_new_packet(pkt, size[0] + size[1] + size[2]);
285
    pkt->stream_index = 0;
286
    pkt->flags |= PKT_FLAG_KEY;
287

    
288
    pkt->size= 0;
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    for(i=0; i<3; i++){
290
        if(size[i]){
291
            ret[i]= get_buffer(f[i], pkt->data + pkt->size, size[i]);
292
            if (!s->is_pipe)
293
                url_fclose(f[i]);
294
            if(ret[i]>0)
295
                pkt->size += ret[i];
296
        }
297
    }
298

    
299
    if (ret[0] <= 0 || ret[1]<0 || ret[2]<0) {
300
        av_free_packet(pkt);
301
        return AVERROR(EIO); /* signal EOF */
302
    } else {
303
        s->img_count++;
304
        s->img_number++;
305
        return 0;
306
    }
307
}
308

    
309
#if CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER
310
/******************************************************/
311
/* image output */
312

    
313
static int img_write_header(AVFormatContext *s)
314
{
315
    VideoData *img = s->priv_data;
316

    
317
    img->img_number = 1;
318
    av_strlcpy(img->path, s->filename, sizeof(img->path));
319

    
320
    /* find format */
321
    if (s->oformat->flags & AVFMT_NOFILE)
322
        img->is_pipe = 0;
323
    else
324
        img->is_pipe = 1;
325

    
326
    return 0;
327
}
328

    
329
static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
330
{
331
    VideoData *img = s->priv_data;
332
    ByteIOContext *pb[3];
333
    char filename[1024];
334
    AVCodecContext *codec= s->streams[ pkt->stream_index ]->codec;
335
    int i;
336

    
337
    if (!img->is_pipe) {
338
        if (av_get_frame_filename(filename, sizeof(filename),
339
                                  img->path, img->img_number) < 0 && img->img_number>1)
340
            return AVERROR(EIO);
341
        for(i=0; i<3; i++){
342
            if (url_fopen(&pb[i], filename, URL_WRONLY) < 0)
343
                return AVERROR(EIO);
344

    
345
            if(codec->codec_id != CODEC_ID_RAWVIDEO)
346
                break;
347
            filename[ strlen(filename) - 1 ]= 'U' + i;
348
        }
349
    } else {
350
        pb[0] = s->pb;
351
    }
352

    
353
    if(codec->codec_id == CODEC_ID_RAWVIDEO){
354
        int ysize = codec->width * codec->height;
355
        put_buffer(pb[0], pkt->data        , ysize);
356
        put_buffer(pb[1], pkt->data + ysize, (pkt->size - ysize)/2);
357
        put_buffer(pb[2], pkt->data + ysize +(pkt->size - ysize)/2, (pkt->size - ysize)/2);
358
        put_flush_packet(pb[1]);
359
        put_flush_packet(pb[2]);
360
        url_fclose(pb[1]);
361
        url_fclose(pb[2]);
362
    }else{
363
        if(av_str2id(img_tags, s->filename) == CODEC_ID_JPEG2000){
364
            AVStream *st = s->streams[0];
365
            if(st->codec->extradata_size > 8 &&
366
               AV_RL32(st->codec->extradata+4) == MKTAG('j','p','2','h')){
367
                if(pkt->size < 8 || AV_RL32(pkt->data+4) != MKTAG('j','p','2','c'))
368
                    goto error;
369
                put_be32(pb[0], 12);
370
                put_tag (pb[0], "jP  ");
371
                put_be32(pb[0], 0x0D0A870A); // signature
372
                put_be32(pb[0], 20);
373
                put_tag (pb[0], "ftyp");
374
                put_tag (pb[0], "jp2 ");
375
                put_be32(pb[0], 0);
376
                put_tag (pb[0], "jp2 ");
377
                put_buffer(pb[0], st->codec->extradata, st->codec->extradata_size);
378
            }else if(pkt->size < 8 ||
379
                     (!st->codec->extradata_size &&
380
                      AV_RL32(pkt->data+4) != MKTAG('j','P',' ',' '))){ // signature
381
            error:
382
                av_log(s, AV_LOG_ERROR, "malformated jpeg2000 codestream\n");
383
                return -1;
384
            }
385
        }
386
        put_buffer(pb[0], pkt->data, pkt->size);
387
    }
388
    put_flush_packet(pb[0]);
389
    if (!img->is_pipe) {
390
        url_fclose(pb[0]);
391
    }
392

    
393
    img->img_number++;
394
    return 0;
395
}
396

    
397
#endif /* CONFIG_IMAGE2_MUXER || CONFIG_IMAGE2PIPE_MUXER */
398

    
399
/* input */
400
#if CONFIG_IMAGE2_DEMUXER
401
AVInputFormat image2_demuxer = {
402
    "image2",
403
    NULL_IF_CONFIG_SMALL("image2 sequence"),
404
    sizeof(VideoData),
405
    image_probe,
406
    img_read_header,
407
    img_read_packet,
408
    NULL,
409
    NULL,
410
    NULL,
411
    AVFMT_NOFILE,
412
};
413
#endif
414
#if CONFIG_IMAGE2PIPE_DEMUXER
415
AVInputFormat image2pipe_demuxer = {
416
    "image2pipe",
417
    NULL_IF_CONFIG_SMALL("piped image2 sequence"),
418
    sizeof(VideoData),
419
    NULL, /* no probe */
420
    img_read_header,
421
    img_read_packet,
422
};
423
#endif
424

    
425
/* output */
426
#if CONFIG_IMAGE2_MUXER
427
AVOutputFormat image2_muxer = {
428
    "image2",
429
    NULL_IF_CONFIG_SMALL("image2 sequence"),
430
    "",
431
    "bmp,jpeg,jpg,ljpg,pam,pbm,pcx,pgm,pgmyuv,png,ppm,sgi,tif,tiff,jp2",
432
    sizeof(VideoData),
433
    CODEC_ID_NONE,
434
    CODEC_ID_MJPEG,
435
    img_write_header,
436
    img_write_packet,
437
    NULL,
438
    .flags= AVFMT_NOTIMESTAMPS | AVFMT_NOFILE
439
};
440
#endif
441
#if CONFIG_IMAGE2PIPE_MUXER
442
AVOutputFormat image2pipe_muxer = {
443
    "image2pipe",
444
    NULL_IF_CONFIG_SMALL("piped image2 sequence"),
445
    "",
446
    "",
447
    sizeof(VideoData),
448
    CODEC_ID_NONE,
449
    CODEC_ID_MJPEG,
450
    img_write_header,
451
    img_write_packet,
452
    .flags= AVFMT_NOTIMESTAMPS
453
};
454
#endif