/* * Copyright (c) 2003-2004, François-Olivier Devaux * Copyright (c) 2003-2004, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include "mj2.h" #include "mj2_convert.h" #define MJ2_JP 0x6a502020 #define MJ2_FTYP 0x66747970 #define MJ2_MJ2 0x6d6a7032 #define MJ2_MJ2S 0x6d6a3273 #define MJ2_MDAT 0x6d646174 #define MJ2_MOOV 0x6d6f6f76 #define MJ2_MVHD 0x6d766864 #define MJ2_TRAK 0x7472616b #define MJ2_TKHD 0x746b6864 #define MJ2_MDIA 0x6d646961 #define MJ2_MDHD 0x6d646864 #define MJ2_MHDR 0x6d686472 #define MJ2_HDLR 0x68646C72 #define MJ2_MINF 0x6d696e66 #define MJ2_VMHD 0x766d6864 #define MJ2_SMHD 0x736d6864 #define MJ2_HMHD 0x686d6864 #define MJ2_DINF 0x64696e66 #define MJ2_DREF 0x64726566 #define MJ2_URL 0x75726c20 #define MJ2_URN 0x75726e20 #define MJ2_STBL 0x7374626c #define MJ2_STSD 0x73747364 #define MJ2_STTS 0x73747473 #define MJ2_STSC 0x73747363 #define MJ2_STSZ 0x7374737A #define MJ2_STCO 0x7374636f #define MJ2_MOOF 0x6d6f6f66 #define MJ2_FREE 0x66726565 #define MJ2_SKIP 0x736b6970 #define MJ2_JP2C 0x6a703263 #define MJ2_FIEL 0x6669656c #define MJ2_JP2P 0x6a703270 #define MJ2_JP2X 0x6a703278 #define MJ2_JSUB 0x6a737562 #define MJ2_ORFO 0x6f72666f #define MJ2_MVEX 0x6d766578 #define MJ2_JP2 0x6a703220 #define MJ2_J2P0 0x4a325030 /* * * Free movie structure memory * */ void mj2_memory_free(mj2_movie_t * movie) { int i; mj2_tk_t *tk=NULL; if (movie->num_cl != 0) free(movie->cl); for (i = 0; i < movie->num_vtk + movie->num_stk + movie->num_htk; i++) { tk = &movie->tk[i]; if (tk->name_size != 0) free(tk->name); if (tk->num_url != 0) free(tk->url); if (tk->num_urn != 0) free(tk->urn); if (tk->num_br != 0) free(tk->br); if (tk->num_jp2x != 0) free(tk->jp2xdata); if (tk->num_tts != 0) free(tk->tts); if (tk->num_chunks != 0) free(tk->chunk); if (tk->num_samplestochunk != 0) free(tk->sampletochunk); if (tk->num_samples != 0) free(tk->sample); } free(movie->tk); } /* * * Read box headers * */ int mj2_read_boxhdr(mj2_box_t * box) { box->init_pos = cio_tell(); box->length = cio_read(4); box->type = cio_read(4); if (box->length == 1) { if (cio_read(4) != 0) { fprintf(stderr, "Error: Cannot handle box sizes higher than 2^32\n"); return 1; }; box->length = cio_read(4); } return 0; } /* * * Initialisation of a Standard Video Track * with one sample per chunk */ int mj2_init_stdmovie(mj2_movie_t * movie) { int i; unsigned int j; time_t ltime; movie->brand = MJ2_MJ2; movie->minversion = 0; movie->num_cl = 2; movie->cl = (unsigned int *) malloc(movie->num_cl * sizeof(unsigned int)); movie->cl[0] = MJ2_MJ2; movie->cl[1] = MJ2_MJ2S; time(<ime); /* Time since 1/1/70 */ movie->creation_time = (unsigned int) ltime + 2082844800; /* Seconds between 1/1/04 and 1/1/70 */ movie->timescale = 1000; movie->rate = 1; /* Rate to play presentation (default = 0x00010000) */ movie->volume = 1; /* Movie volume (default = 0x0100) */ movie->trans_matrix[0] = 0x00010000; /* Transformation matrix for video */ movie->trans_matrix[1] = 0; /* Unity is { 0x00010000,0,0,0,0x00010000,0,0,0,0x40000000 } */ movie->trans_matrix[2] = 0; movie->trans_matrix[3] = 0; movie->trans_matrix[4] = 0x00010000; movie->trans_matrix[5] = 0; movie->trans_matrix[6] = 0; movie->trans_matrix[7] = 0; movie->trans_matrix[8] = 0x40000000; for (i = 0; i < movie->num_htk + movie->num_stk + movie->num_vtk; i++) { mj2_tk_t *tk = &movie->tk[i]; if (tk->track_type == 0) { tk->num_samples = yuv_num_frames(tk); if (tk->num_samples == 0) return 1; tk->Dim[0] = 0; tk->Dim[1] = 0; tk->timescale = 1000; /* Timescale = 1 ms */ tk->sample = (mj2_sample_t *) malloc(tk->num_samples * sizeof(mj2_sample_t)); tk->num_chunks = tk->num_samples; tk->chunk = (mj2_chunk_t *) malloc(tk->num_chunks * sizeof(mj2_chunk_t)); tk->chunk[0].num_samples = 1; tk->chunk[0].sample_descr_idx = 1; tk->same_sample_size = 0; tk->num_samplestochunk = 1; /* One sample per chunk */ tk->sampletochunk = (mj2_sampletochunk_t *) malloc(tk->num_samplestochunk * sizeof(mj2_sampletochunk_t)); tk->sampletochunk[0].first_chunk = 1; tk->sampletochunk[0].samples_per_chunk = 1; tk->sampletochunk[0].sample_descr_idx = 1; for (j = 0; j < tk->num_samples; j++) tk->sample[j].sample_delta = tk->timescale / tk->sample_rate; tk->num_tts = 1; tk->tts = (mj2_tts_t *) malloc(tk->num_tts * sizeof(mj2_tts_t)); tk->tts[0].sample_count = tk->num_samples; tk->tts[0].sample_delta = tk->timescale / tk->sample_rate; tk->horizresolution = 0x00480000; /* Horizontal resolution (typically 72) */ tk->vertresolution = 0x00480000; /* Vertical resolution (typically 72) */ tk->compressorname[0] = 0x0f4d6f74; /* Compressor Name[]: Motion JPEG2000 */ tk->compressorname[1] = 0x696f6e20; tk->compressorname[2] = 0x4a504547; tk->compressorname[3] = 0x32303030; tk->compressorname[4] = 0x00120000; tk->compressorname[5] = 0; tk->compressorname[6] = 0x00000042; tk->compressorname[7] = 0x000000DC; tk->num_url = 0; /* Number of URL */ tk->num_urn = 0; /* Number of URN */ tk->graphicsmode = 0; /* Graphicsmode */ tk->opcolor[0] = 0; /* OpColor */ tk->opcolor[1] = 0; /* OpColor */ tk->opcolor[2] = 0; /* OpColor */ tk->creation_time = movie->creation_time; /* Seconds between 1/1/04 and 1/1/70 */ tk->language = 0; /* Language (undefined) */ tk->layer = 0; tk->volume = 1; tk->trans_matrix[0] = 0x00010000; /* Transformation matrix for track */ tk->trans_matrix[1] = 0; /* Unity is { 0x00010000,0,0,0,0x00010000,0,0,0,0x40000000 } */ tk->trans_matrix[2] = 0; tk->trans_matrix[3] = 0; tk->trans_matrix[4] = 0x00010000; tk->trans_matrix[5] = 0; tk->trans_matrix[6] = 0; tk->trans_matrix[7] = 0; tk->trans_matrix[8] = 0x40000000; tk->fieldcount = 1; tk->fieldorder = 0; tk->or_fieldcount = 1; tk->or_fieldorder = 0; tk->num_br = 2; tk->br = (unsigned int *) malloc(tk->num_br * sizeof(unsigned int)); tk->br[0] = MJ2_JP2; tk->br[1] = MJ2_J2P0; tk->num_jp2x = 0; tk->hsub = 2; /* 4:2:0 */ tk->vsub = 2; /* 4:2:0 */ tk->hoff = 0; tk->voff = 0; } } return 0; } /* * Time To Sample box Decompact * */ void mj2_tts_decompact(mj2_tk_t * tk) { int i, j; tk->num_samples = 0; for (i = 0; i < tk->num_tts; i++) { tk->num_samples += tk->tts[i].sample_count; } tk->sample = (mj2_sample_t *) malloc(tk->num_samples * sizeof(mj2_sample_t)); for (i = 0; i < tk->num_tts; i++) { for (j = 0; j < tk->tts[i].sample_count; j++) { tk->sample[j].sample_delta = tk->tts[i].sample_delta; } } } /* * Sample To Chunk box Decompact * */ void mj2_stsc_decompact(mj2_tk_t * tk) { int j, i; unsigned int k; int sampleno=0; if (tk->num_samplestochunk == 1) { tk->num_chunks = (unsigned int) ceil((double) tk->num_samples / (double) tk->sampletochunk[0].samples_per_chunk); tk->chunk = (mj2_chunk_t *) malloc(tk->num_chunks * sizeof(mj2_chunk_t)); for (k = 0; k < tk->num_chunks; k++) { tk->chunk[k].num_samples = tk->sampletochunk[0].samples_per_chunk; } } else { tk->chunk = (mj2_chunk_t *) malloc(tk->num_samples * sizeof(mj2_chunk_t)); tk->num_chunks = 0; for (i = 0; i < tk->num_samplestochunk -1 ; i++) { for (j = tk->sampletochunk[i].first_chunk - 1; j < tk->sampletochunk[i + 1].first_chunk - 1; j++) { tk->chunk[j].num_samples = tk->sampletochunk[i].samples_per_chunk; tk->num_chunks++; sampleno += tk->chunk[j].num_samples; } } tk->num_chunks += (int)(tk->num_samples - sampleno) / tk->sampletochunk[tk->num_samplestochunk - 1].samples_per_chunk; for (k = tk->sampletochunk[tk->num_samplestochunk - 1].first_chunk - 1; k < tk->num_chunks; k++) { tk->chunk[k].num_samples = tk->sampletochunk[tk->num_samplestochunk - 1].samples_per_chunk; } tk->chunk = realloc(tk->chunk, tk->num_chunks * sizeof(mj2_chunk_t)); } } /* * Chunk offset box Decompact * */ void mj2_stco_decompact(mj2_tk_t * tk) { int j; unsigned int i; int k = 0; int intra_chunk_offset; for (i = 0; i < tk->num_chunks; i++) { intra_chunk_offset = 0; for (j = 0; j < tk->chunk[i].num_samples; j++) { tk->sample[k].offset = intra_chunk_offset + tk->chunk[i].offset; intra_chunk_offset += tk->sample[k].sample_size; k++; } } } /* * Write the JP box * * JP Signature box * */ void mj2_write_jp() { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_JP, 4); /* JP */ cio_write(0x0d0a870a, 4); /* 0x0d0a870a required in a JP box */ box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); cio_seek(box.init_pos + box.length); } /* * Read the JP box * * JPEG 2000 signature * */ int mj2_read_jp() { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_JP != box.type) { /* Check Marker */ fprintf(stderr, "Error: Expected JP Marker\n"); return 1; } if (0x0d0a870a != cio_read(4)) { /* read the 0x0d0a870a required in a JP box */ fprintf(stderr, "Error with JP Marker\n"); return 1; } if (cio_tell() - box.init_pos != box.length) { /* Check box length */ fprintf(stderr, "Error with JP Box size \n"); return 1; } return 0; } /* * Write the FTYP box * * File type box * */ void mj2_write_ftyp(mj2_movie_t * movie) { int i; mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_FTYP, 4); /* FTYP */ cio_write(movie->brand, 4); /* BR */ cio_write(movie->minversion, 4); /* MinV */ for (i = 0; i < movie->num_cl; i++) cio_write(movie->cl[i], 4); /* CL */ box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* Length */ cio_seek(box.init_pos + box.length); } /* * Read the FTYP box * * File type box * */ int mj2_read_ftyp(mj2_movie_t * movie) { int i; mj2_box_t box; mj2_read_boxhdr(&box); /* Box Size */ if (MJ2_FTYP != box.type) { fprintf(stderr, "Error: Expected FTYP Marker\n"); return 1; } movie->brand = cio_read(4); /* BR */ movie->minversion = cio_read(4); /* MinV */ movie->num_cl = (box.length - 16) / 4; movie->cl = (unsigned int *) malloc(movie->num_cl * sizeof(unsigned int)); for (i = movie->num_cl - 1; i > -1; i--) movie->cl[i] = cio_read(4); /* CLi */ if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with FTYP Box\n"); return 1; } return 0; } /* * Write the MDAT box * * Media Data box * */ int mj2_write_mdat(FILE * outfile, mj2_movie_t * movie, j2k_image_t * img, j2k_cp_t * cp, char *outbuf, char *index) { unsigned char box_len_ptr; mj2_box_t box; int len, l, k; int i, m; unsigned int j; int pos_correction = 0; int tileno; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_MDAT, 4); /* MDAT */ for (i = 0; i < movie->num_stk + movie->num_htk + movie->num_vtk; i++) { if (movie->tk[i].track_type != 0) { fprintf(stderr, "Unable to write sound or hint tracks\n"); } else { j2k_cp_t cp_init; mj2_tk_t *tk; tk = &movie->tk[i]; fprintf(stderr, "Video Track number %d\n", i + 1); len = cio_tell(); fwrite(outbuf, 1, len, outfile); pos_correction = cio_tell() + pos_correction; free(outbuf); /* Copy the first tile coding parameters (tcp) to cp_init */ cp_init.tcps = (j2k_tcp_t *) malloc(cp->tw * cp->th * sizeof(j2k_tcp_t)); for (tileno = 0; tileno < cp->tw * cp->th; tileno++) { for (l = 0; l < cp->tcps[tileno].numlayers; l++) { cp_init.tcps[tileno].rates[l] = cp->tcps[tileno].rates[l]; //tileno = cp->tcps[tileno].rates[l]; } } for (j = 0; j < tk->num_samples; j++) { outbuf = (char *) malloc(cp->tdx * cp->tdy * cp->th * cp->tw * 2); cio_init(outbuf, cp->tdx * cp->tdy * cp->th * cp->tw * 2); fprintf(stderr, "Frame number %d/%d: \n", j + 1, tk->num_samples); if (!yuvtoimage(tk, img, j)) { fprintf(stderr, "Error with frame number %d in YUV file\n", j); return 1; } len = jp2_write_jp2c(img, cp, outbuf, index); for (m = 0; m < img->numcomps; m++) { free(img->comps[m].data); } tk->sample[j].sample_size = len; tk->sample[j].offset = pos_correction; tk->chunk[j].offset = pos_correction; /* There is one sample per chunk */ fwrite(outbuf, 1, len, outfile); pos_correction = cio_tell() + pos_correction; free(outbuf); /* Copy the cp_init parameters to cp->tcps */ for (tileno = 0; tileno < cp->tw * cp->th; tileno++) { for (k = 0; k < cp->tcps[tileno].numlayers; k++) { cp->tcps[tileno].rates[k] = cp_init.tcps[tileno].rates[k]; } } } } box.length = pos_correction - box.init_pos; fseek(outfile, box.init_pos, SEEK_SET); cio_init(&box_len_ptr, 4); /* Init a cio to write box length variable in a little endian way */ cio_write(box.length, 4); fwrite(&box_len_ptr, 4, 1, outfile); fseek(outfile, box.init_pos + box.length, SEEK_SET); } return 0; } /* * Read the MDAT box * * Media Data box * */ int mj2_read_mdat(mj2_movie_t * movie, unsigned char *src, char *outfile) { int track_nb; unsigned int i; int jp2c_cio_len, jp2c_len, pos_correction = 0; FILE *f=NULL; int compno; mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_MDAT != box.type) { fprintf(stderr, "Error: Expected MDAT Marker\n"); return 1; } pos_correction = cio_tell() - box.init_pos; f = fopen(outfile, "w"); /* Erase content of file if it already exists */ fclose(f); for (track_nb = 0; track_nb < movie->next_tk_id - 1; track_nb++) { if (movie->tk[track_nb].imagefile != NULL) { fprintf(stderr, "%s", movie->tk[track_nb].imagefile); f = fopen(movie->tk[track_nb].imagefile, "w"); // Erase content of file if it already exists fclose(f); } } for (track_nb = 0; track_nb < movie->num_htk + movie->num_stk + movie->num_vtk; track_nb++) { mj2_tk_t *tk = &movie->tk[track_nb]; if (tk->track_type != 0) { cio_seek(box.init_pos); cio_skip(box.length); } else { fprintf(stderr, "Track %d: Width=%d Height=%d\n", track_nb, tk->w, tk->h); fprintf(stderr, "%d Samples\n", tk->num_samples); if (tk->imagefile == NULL) { tk->imagefile = outfile; } for (i = 0; i < tk->num_samples; i++) { mj2_sample_t *sample = &tk->sample[i]; j2k_image_t img; j2k_cp_t cp; unsigned char *pos; fprintf(stderr, "Frame %d / %d: \n", i+1, tk->num_samples); cio_init(src + sample->offset, 8); jp2c_cio_len = cio_tell(); jp2c_len = cio_read(4); if (MJ2_JP2C != cio_read(4)) { fprintf(stderr, "Error: Expected JP2C Marker\n"); return 1; } pos = src + sample->offset + 8; cio_seek(sample->offset + 8); if (!j2k_decode(pos, sample->sample_size, &img, &cp)) return 1; if (imagetoyuv(&img, &cp, tk->imagefile)) return 1; j2k_dec_release(); for (compno=0; compno < img.numcomps; compno++) free(img.comps[compno].data); if (cio_tell() + 8 != jp2c_len) { fprintf(stderr, "Error with JP2C Box Size\n"); return 1; } } } } cio_seek(box.init_pos); cio_skip(box.length); /* Go back to box end */ return 0; } /* * Write the STCO box * * Chunk Offset Box * */ void mj2_write_stco(mj2_tk_t * tk) { mj2_box_t box; unsigned int i; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_STCO, 4); /* STCO */ cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(tk->num_chunks, 4); /* Entry Count */ for (i = 0; i < tk->num_chunks; i++) { cio_write(tk->chunk[i].offset, 4); /* Entry offset */ } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the STCO box * * Chunk Offset Box * */ int mj2_read_stco(mj2_tk_t * tk) { unsigned int i; mj2_box_t box; mj2_read_boxhdr(&box); /* Box Size */ if (MJ2_STCO != box.type) { fprintf(stderr, "Error: Expected STCO Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in STCO box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in STCO box. Expected flag 0\n"); return 1; } if (cio_read(4) != tk->num_chunks) { fprintf(stderr, "Error in STCO box: expecting same amount of entry-count as chunks \n"); } else { for (i = 0; i < tk->num_chunks; i++) { tk->chunk[i].offset = cio_read(4); /* Entry offset */ } } mj2_stco_decompact(tk); if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with STCO Box size\n"); return 1; } return 0; } /* * Write the STSZ box * * Sample size box * */ void mj2_write_stsz(mj2_tk_t * tk) { mj2_box_t box; unsigned int i; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_STSZ, 4); /* STSZ */ cio_write(0, 4); /* Version = 0, flags = 0 */ if (tk->same_sample_size == 1) { /* If they all have the same size */ cio_write(tk->sample[0].sample_size, 4); /* Size */ cio_write(1, 4); /* Entry count = 1 */ } else { cio_write(0, 4); /* Sample Size = 0 becase they all have different sizes */ cio_write(tk->num_samples, 4); /* Sample Count */ for (i = 0; i < tk->num_samples; i++) { cio_write(tk->sample[i].sample_size, 4); } } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the STSZ box * * Sample size box * */ int mj2_read_stsz(mj2_tk_t * tk) { int sample_size; unsigned int i; mj2_box_t box; mj2_read_boxhdr(&box); /* Box Size */ if (MJ2_STSZ != box.type) { fprintf(stderr, "Error: Expected STSZ Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in STSZ box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in STSZ box. Expected flag 0\n"); return 1; } sample_size = cio_read(4); if (sample_size != 0) { /* Samples do have the same size */ tk->same_sample_size = 1; for (i = 0; i < tk->num_samples; i++) { tk->sample[i].sample_size = sample_size; } cio_skip(4); /* Sample count = 1 */ } else { tk->same_sample_size = 0; if (tk->num_samples != cio_read(4)) { /* Sample count */ fprintf(stderr, "Error in STSZ box. Expected that sample-count is number of samples in track\n"); return 1; } for (i = 0; i < tk->num_samples; i++) { tk->sample[i].sample_size = cio_read(4); /* Sample Size */ } if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with STSZ Box size\n"); return 1; } } return 0; } /* * Write the STSC box * * Sample to Chunk * */ void mj2_write_stsc(mj2_tk_t * tk) { int i; mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_STSC, 4); /* STSC */ cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(tk->num_samplestochunk, 4); /* Entry Count */ for (i = 0; i < tk->num_samplestochunk; i++) { cio_write(tk->sampletochunk[i].first_chunk, 4); /* First Chunk */ cio_write(tk->sampletochunk[i].samples_per_chunk, 4); /* Samples per chunk */ cio_write(tk->sampletochunk[i].sample_descr_idx, 4); /* Samples description index */ } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the STSC box * * Sample to Chunk * */ int mj2_read_stsc(mj2_tk_t * tk) { int i; mj2_box_t box; mj2_read_boxhdr(&box); /* Box Size */ if (MJ2_STSC != box.type) { fprintf(stderr, "Error: Expected STSC Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in STSC box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in STSC box. Expected flag 0\n"); return 1; } tk->num_samplestochunk = cio_read(4); tk->sampletochunk = (mj2_sampletochunk_t *) malloc(tk->num_samplestochunk * sizeof(mj2_sampletochunk_t)); for (i = 0; i < tk->num_samplestochunk; i++) { tk->sampletochunk[i].first_chunk = cio_read(4); tk->sampletochunk[i].samples_per_chunk = cio_read(4); tk->sampletochunk[i].sample_descr_idx = cio_read(4); } mj2_stsc_decompact(tk); /* decompact sample to chunk box */ if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with STSC Box size\n"); return 1; } return 0; } /* * Write the STTS box * * Time to Sample Box * */ void mj2_write_stts(mj2_tk_t * tk) { int i; mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_STTS, 4); /* STTS */ cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(tk->num_tts, 4); /* entry_count */ for (i = 0; i < tk->num_tts; i++) { cio_write(tk->tts[i].sample_count, 4); /* Sample-count */ cio_write(tk->tts[i].sample_delta, 4); /* Sample-Delta */ } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the STTS box * * * */ int mj2_read_stts(mj2_tk_t * tk) { int i; mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_STTS != box.type) { fprintf(stderr, "Error: Expected STTS Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in STTS box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in STTS box. Expected flag 0\n"); return 1; } tk->num_tts = cio_read(4); tk->tts = (mj2_tts_t *) malloc(tk->num_tts * sizeof(mj2_tts_t)); for (i = 0; i < tk->num_tts; i++) { tk->tts[i].sample_count = cio_read(4); tk->tts[i].sample_delta = cio_read(4); } mj2_tts_decompact(tk); if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with STTS Box size\n"); return 1; } return 0; } /* * Write the FIEL box * * Field coding Box * */ void mj2_write_fiel(mj2_tk_t * tk) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_FIEL, 4); /* STTS */ cio_write(tk->fieldcount, 1); /* Field count */ cio_write(tk->fieldorder, 1); /* Field order */ box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the FIEL box * * Field coding Box * */ int mj2_read_fiel(mj2_tk_t * tk) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_FIEL != box.type) { fprintf(stderr, "Error: Expected FIEL Marker\n"); return 1; } tk->fieldcount = cio_read(1); tk->fieldorder = cio_read(1); if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with FIEL Box size\n"); return 1; } return 0; } /* * Write the ORFO box * * Original Format Box * */ void mj2_write_orfo(mj2_tk_t * tk) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_ORFO, 4); cio_write(tk->or_fieldcount, 1); /* Original Field count */ cio_write(tk->or_fieldorder, 1); /* Original Field order */ box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the ORFO box * * Original Format Box * */ int mj2_read_orfo(mj2_tk_t * tk) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_ORFO != box.type) { fprintf(stderr, "Error: Expected ORFO Marker\n"); return 1; } tk->or_fieldcount = cio_read(1); tk->or_fieldorder = cio_read(1); if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with ORFO Box size\n"); return 1; } return 0; } /* * Write the JP2P box * * MJP2 Profile Box * */ void mj2_write_jp2p(mj2_tk_t * tk) { int i; mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_JP2P, 4); cio_write(0, 4); /* Version 0, flags =0 */ for (i = 0; i < tk->num_br; i++) { cio_write(tk->br[i], 4); } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the JP2P box * * MJP2 Profile Box * */ int mj2_read_jp2p(mj2_tk_t * tk) { int i; mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_JP2P != box.type) { fprintf(stderr, "Error: Expected JP2P Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in JP2P box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in JP2P box. Expected flag 0\n"); return 1; } tk->num_br = (box.length - 12) / 4; tk->br = (unsigned int *) malloc(tk->num_br * sizeof(unsigned int)); for (i = 0; i < tk->num_br; i++) { tk->br[i] = cio_read(4); } if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with JP2P Box size\n"); return 1; } return 0; } /* * Write the JP2X box * * MJP2 Prefix Box * */ void mj2_write_jp2x(mj2_tk_t * tk) { int i; mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_JP2X, 4); for (i = 0; i < tk->num_jp2x; i++) { cio_write(tk->jp2xdata[i], 1); } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the JP2X box * * MJP2 Prefix Box * */ int mj2_read_jp2x(mj2_tk_t * tk) { unsigned int i; mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_JP2X != box.type) { fprintf(stderr, "Error: Expected JP2X Marker\n"); return 1; } tk->num_jp2x = (box.length - 8); tk->jp2xdata = (unsigned char *) malloc(tk->num_jp2x * sizeof(unsigned char)); for (i = 0; i < tk->num_jp2x; i++) { tk->jp2xdata[i] = cio_read(1); } if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with JP2X Box size\n"); return 1; } return 0; } /* * Write the JSUB box * * MJP2 Subsampling Box * */ void mj2_write_jsub(mj2_tk_t * tk) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_JSUB, 4); cio_write(tk->hsub, 1); cio_write(tk->vsub, 1); cio_write(tk->hoff, 1); cio_write(tk->voff, 1); box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the JSUB box * * MJP2 Subsampling Box * */ int mj2_read_jsub(mj2_tk_t * tk) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_JSUB != box.type) { fprintf(stderr, "Error: Expected JSUB Marker\n"); return 1; } tk->hsub = cio_read(1); tk->vsub = cio_read(1); tk->hoff = cio_read(1);; tk->voff = cio_read(1); if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with JSUB Box size\n"); return 1; } return 0; } /* * Write the SMJ2 box * * Visual Sample Entry Description * */ void mj2_write_smj2(j2k_image_t * img, mj2_tk_t * tk) { int i; mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_MJ2, 4); /* MJ2 */ cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(1, 4); cio_write(0, 2); /* Pre-defined */ cio_write(0, 2); /* Reserved */ cio_write(0, 4); /* Pre-defined */ cio_write(0, 4); /* Pre-defined */ cio_write(0, 4); /* Pre-defined */ cio_write(tk->w, 2); /* Width */ cio_write(tk->h, 2); /* Height */ cio_write(tk->horizresolution, 4); /* Horizontal resolution */ cio_write(tk->vertresolution, 4); /* Vertical resolution */ cio_write(0, 4); /* Reserved */ cio_write(1, 2); /* Pre-defined = 1 */ cio_write(tk->compressorname[0], 4); /* Compressor Name */ cio_write(tk->compressorname[1], 4); cio_write(tk->compressorname[2], 4); cio_write(tk->compressorname[3], 4); cio_write(tk->compressorname[4], 4); cio_write(tk->compressorname[5], 4); cio_write(tk->compressorname[6], 4); cio_write(tk->compressorname[7], 4); tk->depth = 0; for (i = 0; i < img->numcomps; i++) tk->depth += img->comps[i].bpp; cio_write(tk->depth, 2); /* Depth */ cio_write(0xffff, 2); /* Pre-defined = -1 */ jp2_init_stdjp2(&tk->jp2_struct, img); jp2_write_jp2h(&tk->jp2_struct); mj2_write_fiel(tk); if (tk->num_br != 0) mj2_write_jp2p(tk); if (tk->num_jp2x != 0) mj2_write_jp2x(tk); mj2_write_jsub(tk); mj2_write_orfo(tk); box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the SMJ2 box * * Visual Sample Entry Description * */ int mj2_read_smj2(j2k_image_t * img, mj2_tk_t * tk) { mj2_box_t box; mj2_box_t box2; int i; mj2_read_boxhdr(&box); if (MJ2_MJ2 != box.type) { fprintf(stderr, "Error in SMJ2 box: Expected MJ2 Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in MJP2 box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in MJP2 box. Expected flag 0\n"); return 1; } cio_skip(4); cio_skip(2); /* Pre-defined */ cio_skip(2); /* Reserved */ cio_skip(4); /* Pre-defined */ cio_skip(4); /* Pre-defined */ cio_skip(4); /* Pre-defined */ tk->w = cio_read(2); /* Width */ tk->h = cio_read(2); /* Height */ tk->horizresolution = cio_read(4); /* Horizontal resolution */ tk->vertresolution = cio_read(4); /* Vertical resolution */ cio_skip(4); /* Reserved */ cio_skip(2); /* Pre-defined = 1 */ tk->compressorname[0] = cio_read(4); /* Compressor Name */ tk->compressorname[1] = cio_read(4); tk->compressorname[2] = cio_read(4); tk->compressorname[3] = cio_read(4); tk->compressorname[4] = cio_read(4); tk->compressorname[5] = cio_read(4); tk->compressorname[6] = cio_read(4); tk->compressorname[7] = cio_read(4); tk->depth = cio_read(2); /* Depth */ /* Init std value */ tk->num_jp2x = 0; tk->fieldcount = 1; tk->fieldorder = 0; tk->or_fieldcount = 1; tk->or_fieldorder = 0; cio_skip(2); /* Pre-defined = -1 */ if (jp2_read_jp2h(&tk->jp2_struct)) { fprintf(stderr, "Error with JP2H Box\n"); return 1; } for (i = 0; cio_tell() - box.init_pos < box.length; i++) { mj2_read_boxhdr(&box2); cio_seek(box2.init_pos); switch (box2.type) { case MJ2_FIEL: if (mj2_read_fiel(tk)) return 1; break; case MJ2_JP2P: if (mj2_read_jp2p(tk)) return 1; break; case MJ2_JP2X: if (mj2_read_jp2x(tk)) return 1; break; case MJ2_JSUB: if (mj2_read_jsub(tk)) return 1; break; case MJ2_ORFO: if (mj2_read_orfo(tk)) return 1; break; default: fprintf(stderr, "Error with MJP2 Box size\n"); return 1; break; } } return 0; } /* * Write the STSD box * * Sample Description * */ void mj2_write_stsd(mj2_tk_t * tk, j2k_image_t * img) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_STSD, 4); /* STSD */ cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(1, 4); /* entry_count = 1 (considering same JP2 headerboxes) */ if (tk->track_type == 0) { mj2_write_smj2(img, tk); } else if (tk->track_type == 1) { // Not implemented } if (tk->track_type == 2) { // Not implemented } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the STSD box * * Sample Description * */ int mj2_read_stsd(mj2_tk_t * tk, j2k_image_t * img) { int i; int entry_count, len_2skip; mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_STSD != box.type) { fprintf(stderr, "Error: Expected STSD Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in STSD box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in STSD box. Expected flag 0\n"); return 1; } entry_count = cio_read(4); if (tk->track_type == 0) { for (i = 0; i < entry_count; i++) { if (mj2_read_smj2(img, tk)) return 1; } } else if (tk->track_type == 1) { len_2skip = cio_read(4); // Not implemented -> skipping box cio_skip(len_2skip - 4); } else if (tk->track_type == 2) { len_2skip = cio_read(4); // Not implemented -> skipping box cio_skip(len_2skip - 4); } if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with STSD Box size\n"); return 1; } return 0; } /* * Write the STBL box * * Sample table box box * */ void mj2_write_stbl(mj2_tk_t * tk, j2k_image_t * img) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_STBL, 4); /* STBL */ mj2_write_stsd(tk, img); mj2_write_stts(tk); mj2_write_stsc(tk); mj2_write_stsz(tk); mj2_write_stco(tk); box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the STBL box * * Sample table box box * */ int mj2_read_stbl(mj2_tk_t * tk, j2k_image_t * img) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_STBL != box.type) { fprintf(stderr, "Error: Expected STBL Marker\n"); return 1; } if (mj2_read_stsd(tk, img)) return 1; if (mj2_read_stts(tk)) return 1; if (mj2_read_stsc(tk)) return 1; if (mj2_read_stsz(tk)) return 1; if (mj2_read_stco(tk)) return 1; if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with STBL Box size\n"); return 1; } return 0; } /* * Write the URL box * * URL box * */ void mj2_write_url(mj2_tk_t * tk, int url_num) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_URL, 4); /* URL */ if (url_num == 0) cio_write(1, 4); /* Version = 0, flags = 1 because stored in same file */ else { cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(tk->url[url_num - 1].location[0], 4); cio_write(tk->url[url_num - 1].location[1], 4); cio_write(tk->url[url_num - 1].location[2], 4); cio_write(tk->url[url_num - 1].location[3], 4); } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the URL box * * URL box * */ int mj2_read_url(mj2_tk_t * tk, int urn_num) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_URL != box.type) { fprintf(stderr, "Error: Expected URL Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in URL box\n"); return 1; } if (1 != cio_read(3)) { /* If flags = 1 --> media data in file */ tk->url[urn_num].location[0] = cio_read(4); tk->url[urn_num].location[1] = cio_read(4); tk->url[urn_num].location[2] = cio_read(4); tk->url[urn_num].location[3] = cio_read(4); } else { tk->num_url--; } if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with URL Box size\n"); return 1; } return 0; } /* * Write the URN box * * URN box * */ void mj2_write_urn(mj2_tk_t * tk, int urn_num) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_URN, 4); /* URN */ cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(tk->urn[urn_num].name[0], 4); cio_write(tk->urn[urn_num].name[1], 4); cio_write(tk->urn[urn_num].name[2], 4); cio_write(tk->urn[urn_num].name[3], 4); cio_write(tk->urn[urn_num].location[0], 4); cio_write(tk->urn[urn_num].location[1], 4); cio_write(tk->urn[urn_num].location[2], 4); cio_write(tk->urn[urn_num].location[3], 4); box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the URN box * * URN box * */ int mj2_read_urn(mj2_tk_t * tk, int urn_num) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_URN != box.type) { fprintf(stderr, "Error: Expected URN Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in URN box\n"); return 1; } if (1 != cio_read(3)) { /* If flags = 1 --> media data in file */ tk->urn[urn_num].name[0] = cio_read(4); tk->urn[urn_num].name[1] = cio_read(4); tk->urn[urn_num].name[2] = cio_read(4); tk->urn[urn_num].name[3] = cio_read(4); tk->urn[urn_num].location[0] = cio_read(4); tk->urn[urn_num].location[1] = cio_read(4); tk->urn[urn_num].location[2] = cio_read(4); tk->urn[urn_num].location[3] = cio_read(4); } if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with URN Box size\n"); return 1; } return 0; } /* * Write the DREF box * * Data reference box * */ void mj2_write_dref(mj2_tk_t * tk) { int i; mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_DREF, 4); /* DREF */ cio_write(0, 4); /* Version = 0, flags = 0 */ if (tk->num_url + tk->num_urn == 0) { /* Media data in same file */ cio_write(1, 4); /* entry_count = 1 */ mj2_write_url(tk, 0); } else { cio_write(tk->num_url + tk->num_urn, 4); /* entry_count */ for (i = 0; i < tk->num_url; i++) mj2_write_url(tk, i + 1); for (i = 0; i < tk->num_urn; i++) mj2_write_urn(tk, i); } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the DREF box * * Data reference box * */ int mj2_read_dref(mj2_tk_t * tk) { int i; int entry_count, marker; mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_DREF != box.type) { fprintf(stderr, "Error: Expected DREF Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in DREF box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in DREF box. Expected flag 0\n"); return 1; } entry_count = cio_read(4); tk->num_url = 0; tk->num_urn = 0; for (i = 0; i < entry_count; i++) { cio_skip(4); marker = cio_read(4); if (marker == MJ2_URL) { cio_skip(-8); tk->num_url++; if (mj2_read_url(tk, tk->num_url)) return 1; } else if (marker == MJ2_URN) { cio_skip(-8); tk->num_urn++; if (mj2_read_urn(tk, tk->num_urn)) return 1; } else { fprintf(stderr, "Error with in DREF box. Expected URN or URL box\n"); return 1; } } if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with DREF Box size\n"); return 1; } return 0; } /* * Write the DINF box * * Data information box * */ void mj2_write_dinf(mj2_tk_t * tk) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_DINF, 4); /* DINF */ mj2_write_dref(tk); box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the DINF box * * Data information box * */ int mj2_read_dinf(mj2_tk_t * tk) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_DINF != box.type) { fprintf(stderr, "Error: Expected DINF Marker\n"); return 1; } if (mj2_read_dref(tk)) return 1; if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with DINF Box size\n"); return 1; } return 0; } /* * Write the VMHD box * * Video Media information box * */ void mj2_write_vmhd(mj2_tk_t * tk) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_VMHD, 4); /* VMHD */ cio_write(1, 4); /* Version = 0, flags = 1 */ cio_write(tk->graphicsmode, 2); cio_write(tk->opcolor[0], 2); cio_write(tk->opcolor[1], 2); cio_write(tk->opcolor[2], 2); box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the VMHD box * * Video Media information box * */ int mj2_read_vmhd(mj2_tk_t * tk) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_VMHD != box.type) { fprintf(stderr, "Error: Expected VMHD Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in VMHD box\n"); return 1; } if (1 != cio_read(3)) { /* Flags = 1 */ fprintf(stderr, "Error with flag in VMHD box. Expected flag 1\n"); return 1; } tk->track_type = 0; tk->graphicsmode = cio_read(2); tk->opcolor[0] = cio_read(2); tk->opcolor[1] = cio_read(2); tk->opcolor[2] = cio_read(2); if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with VMHD Box size\n"); return 1; } return 0; } /* * Write the SMHD box * * Sound Media information box * */ void mj2_write_smhd(mj2_tk_t * tk) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_SMHD, 4); /* SMHD */ cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(tk->balance << 8, 2); cio_write(0, 2); /* Reserved */ box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the SMHD box * * Sound Media information box * */ int mj2_read_smhd(mj2_tk_t * tk) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_SMHD != box.type) { fprintf(stderr, "Error: Expected SMHD Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in VMHD box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in VMHD box. Expected flag 0\n"); return 1; } tk->track_type = 1; tk->balance = cio_read(2) >> 8; cio_skip(2); /* Reserved */ if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with SMHD Box size\n"); return 1; } return 0; } /* * Write the HMHD box * * Hint Media information box * */ void mj2_write_hmhd(mj2_tk_t * tk) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_HMHD, 4); /* HMHD */ cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(tk->maxPDUsize, 2); cio_write(tk->avgPDUsize, 2); cio_write(tk->maxbitrate, 4); cio_write(tk->avgbitrate, 4); cio_write(tk->slidingavgbitrate, 4); box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the HMHD box * * Hint Media information box * */ int mj2_read_hmhd(mj2_tk_t * tk) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_HMHD != box.type) { fprintf(stderr, "Error: Expected HMHD Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in VMHD box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in VMHD box. Expected flag 0\n"); return 1; } tk->track_type = 2; tk->maxPDUsize = cio_read(2); tk->avgPDUsize = cio_read(2); tk->maxbitrate = cio_read(4); tk->avgbitrate = cio_read(4); tk->slidingavgbitrate = cio_read(4); if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with HMHD Box size\n"); return 1; } return 0; } /* * Write the MINF box * * Media information box * */ void mj2_write_minf(mj2_tk_t * tk, j2k_image_t * img) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_MINF, 4); /* MINF */ if (tk->track_type == 0) { mj2_write_vmhd(tk); } else if (tk->track_type == 1) { mj2_write_smhd(tk); } else if (tk->track_type == 2) { mj2_write_hmhd(tk); } mj2_write_dinf(tk); mj2_write_stbl(tk, img); box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the MINF box * * Media information box * */ int mj2_read_minf(mj2_tk_t * tk, j2k_image_t * img) { unsigned int box_type; mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_MINF != box.type) { fprintf(stderr, "Error: Expected MINF Marker\n"); return 1; } cio_skip(4); box_type = cio_read(4); cio_skip(-8); if (box_type == MJ2_VMHD) { if (mj2_read_vmhd(tk)) return 1; } else if (box_type == MJ2_SMHD) { if (mj2_read_smhd(tk)) return 1; } else if (box_type == MJ2_HMHD) { if (mj2_read_hmhd(tk)) return 1; } else { fprintf(stderr, "Error in MINF box expected vmhd, smhd or hmhd\n"); return 1; } if (mj2_read_dinf(tk)) return 1; if (mj2_read_stbl(tk, img)) return 1; if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with MINF Box size\n"); return 1; } return 0; } /* * Write the HDLR box * * Handler reference box * */ void mj2_write_hdlr(mj2_tk_t * tk) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_HDLR, 4); /* HDLR */ cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(0, 4); /* Predefine */ tk->name = 0; /* The track name is immediately determined by the track type */ if (tk->track_type == 0) { tk->handler_type = 0x76696465; /* Handler type: vide */ cio_write(tk->handler_type, 4); cio_write(0, 4); cio_write(0, 4); cio_write(0, 4); /* Reserved */ cio_write(0x76696465, 4); cio_write(0x6F206d65, 4); cio_write(0x64696120, 4); cio_write(0x74726163, 4); cio_write(0x6b00, 2); /* String: video media track */ } else if (tk->track_type == 1) { tk->handler_type = 0x736F756E; /* Handler type: soun */ cio_write(tk->handler_type, 4); cio_write(0, 4); cio_write(0, 4); cio_write(0, 4); /* Reserved */ cio_write(0x536F756E, 4); cio_write(0x6400, 2); /* String: Sound */ } else if (tk->track_type == 2) { tk->handler_type = 0x68696E74; /* Handler type: hint */ cio_write(tk->handler_type, 4); cio_write(0, 4); cio_write(0, 4); cio_write(0, 4); /* Reserved */ cio_write(0x48696E74, 4); cio_write(0, 2); /* String: Hint */ } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the HDLR box * * Handler reference box * */ int mj2_read_hdlr(mj2_tk_t * tk) { int i; mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_HDLR != box.type) { fprintf(stderr, "Error: Expected HDLR Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in VMHD box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in VMHD box. Expected flag 0\n"); return 1; } cio_skip(4); /* Reserved */ tk->handler_type = cio_read(4); cio_skip(12); /* Reserved */ tk->name_size = box.length - 32; tk->name = (char *) malloc(tk->name_size * sizeof(char)); for (i = 0; i < tk->name_size; i++) { tk->name[i] = cio_read(1); /* Name */ } if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with HDLR Box size\n"); return 1; } return 0; } /* * Write the MDHD box * * Media Header Box * */ void mj2_write_mdhd(mj2_tk_t * tk) { mj2_box_t box; unsigned int i; time_t ltime; unsigned int modification_time; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_MDHD, 4); /* MDHD */ cio_write(0, 4); /* Version = 0, flags = 0 */ cio_write(tk->creation_time, 4); /* Creation Time */ time(<ime); /* Time since 1/1/70 */ modification_time = ltime + 2082844800; /* Seoonds between 1/1/04 and 1/1/70 */ cio_write(modification_time, 4); /* Modification Time */ cio_write(tk->timescale, 4); /* Timescale */ tk->duration = 0; for (i = 0; i < tk->num_samples; i++) tk->duration += tk->sample[i].sample_delta; cio_write(tk->duration, 4); /* Duration */ cio_write(tk->language, 2); /* Language */ cio_write(0, 2); /* Predefined */ box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the MDHD box * * Media Header Box * */ int mj2_read_mdhd(mj2_tk_t * tk) { mj2_box_t box; mj2_read_boxhdr(&box); if (!(MJ2_MHDR == box.type || MJ2_MDHD == box.type)) { // Kakadu writes MHDR instead of MDHD fprintf(stderr, "Error: Expected MDHD Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in MDHD box\n"); return 1; } if (0 != cio_read(3)) { /* Flags = 0 */ fprintf(stderr, "Error with flag in MDHD box. Expected flag 0\n"); return 1; } tk->creation_time = cio_read(4); /* Creation Time */ tk->modification_time = cio_read(4); /* Modification Time */ tk->timescale = cio_read(4); /* Timescale */ tk->duration = cio_read(4); /* Duration */ tk->language = cio_read(2); /* Language */ cio_skip(2); /* Predefined */ if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with MDHD Box size\n"); return 1; } return 0; } /* * Write the MDIA box * * Media box * */ void mj2_write_mdia(mj2_tk_t * tk, j2k_image_t * img) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_MDIA, 4); /* MDIA */ mj2_write_mdhd(tk); mj2_write_hdlr(tk); mj2_write_minf(tk, img); box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the MDIA box * * Media box * */ int mj2_read_mdia(mj2_tk_t * tk, j2k_image_t * img) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_MDIA != box.type) { fprintf(stderr, "Error: Expected MDIA Marker\n"); return 1; } if (mj2_read_mdhd(tk)) return 1; if (mj2_read_hdlr(tk)) return 1; if (mj2_read_minf(tk, img)) return 1; if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with MDIA Box size\n"); return 1; } return 0; } /* * Write the TKHD box * * Track Header box * */ void mj2_write_tkhd(mj2_tk_t * tk) { mj2_box_t box; unsigned int i; time_t ltime; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_TKHD, 4); /* TKHD */ cio_write(3, 4); /* Version=0, flags=3 */ time(<ime); /* Time since 1/1/70 */ tk->modification_time = ltime + 2082844800; /* Seoonds between 1/1/04 and 1/1/70 */ cio_write(tk->creation_time, 4); /* Creation Time */ cio_write(tk->modification_time, 4); /* Modification Time */ cio_write(tk->track_ID, 4); /* Track ID */ cio_write(0, 4); /* Reserved */ tk->duration = 0; for (i = 0; i < tk->num_samples; i++) tk->duration += tk->sample[i].sample_delta; cio_write(tk->duration, 4); /* Duration */ cio_write(0, 4); /* Reserved */ cio_write(0, 4); /* Reserved */ cio_write(tk->layer, 2); /* Layer */ cio_write(0, 2); /* Predefined */ cio_write(tk->volume << 8, 2); /* Volume */ cio_write(0, 2); /* Reserved */ cio_write(tk->trans_matrix[0], 4); /* Transformation matrix for track */ cio_write(tk->trans_matrix[1], 4); cio_write(tk->trans_matrix[2], 4); cio_write(tk->trans_matrix[3], 4); cio_write(tk->trans_matrix[4], 4); cio_write(tk->trans_matrix[5], 4); cio_write(tk->trans_matrix[6], 4); cio_write(tk->trans_matrix[7], 4); cio_write(tk->trans_matrix[8], 4); cio_write(tk->w << 16, 4); /* Video Width */ cio_write(tk->h << 16, 4); /* Video Height */ box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the TKHD box * * Track Header box * */ int mj2_read_tkhd(mj2_tk_t * tk) { int flag; mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_TKHD != box.type) { fprintf(stderr, "Error: Expected TKHD Marker\n"); return 1; } if (0 != cio_read(1)) { /* Version = 0 */ fprintf(stderr, "Error: Only Version 0 handled in TKHD box\n"); return 1; } flag = cio_read(3); if (!(flag == 1 || flag == 2 || flag == 3 || flag == 4)) { /* Flags = 1,2,3 or 4 */ fprintf(stderr, "Error with flag in TKHD box: Expected flag 1,2,3 or 4\n"); return 1; } tk->creation_time = cio_read(4); /* Creation Time */ tk->modification_time = cio_read(4); /* Modification Time */ tk->track_ID = cio_read(4); /* Track ID */ cio_skip(4); /* Reserved */ tk->duration = cio_read(4); /* Duration */ cio_skip(8); /* Reserved */ tk->layer = cio_read(2); /* Layer */ cio_read(2); /* Predefined */ tk->volume = cio_read(2) >> 8; /* Volume */ cio_skip(2); /* Reserved */ tk->trans_matrix[0] = cio_read(4); /* Transformation matrix for track */ tk->trans_matrix[1] = cio_read(4); tk->trans_matrix[2] = cio_read(4); tk->trans_matrix[3] = cio_read(4); tk->trans_matrix[4] = cio_read(4); tk->trans_matrix[5] = cio_read(4); tk->trans_matrix[6] = cio_read(4); tk->trans_matrix[7] = cio_read(4); tk->trans_matrix[8] = cio_read(4); tk->w = cio_read(4) >> 16; /* Video Width */ tk->h = cio_read(4) >> 16; /* Video Height */ if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with TKHD Box size\n"); return 1; } return 0; } /* * Write the TRAK box * * Track box * */ void mj2_write_trak(mj2_tk_t * tk, j2k_image_t * img) { mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_TRAK, 4); /* TRAK */ mj2_write_tkhd(tk); mj2_write_mdia(tk, img); box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the TRAK box * * Track box * */ int mj2_read_trak(mj2_tk_t * tk, j2k_image_t * img) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_TRAK != box.type) { fprintf(stderr, "Error: Expected TRAK Marker\n"); return 1; } if (mj2_read_tkhd(tk)) return 1; if (mj2_read_mdia(tk, img)) return 1; if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with TRAK Box\n"); return 1; } return 0; } /* * Write the MVHD box * * Movie header Box * */ void mj2_write_mvhd(mj2_movie_t * movie) { int i; mj2_box_t box; unsigned j; time_t ltime; int max_tk_num = 0; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_MVHD, 4); /* MVHD */ cio_write(0, 4); /* Version = 0, flags = 0 */ time(<ime); /* Time since 1/1/70 */ movie->modification_time = ltime + 2082844800; /* Seoonds between 1/1/04 and 1/1/70 */ cio_write(movie->creation_time, 4); /* Creation Time */ cio_write(movie->modification_time, 4); /* Modification Time */ cio_write(movie->timescale, 4); /* Timescale */ movie->duration = 0; for (i = 0; i < (movie->num_stk + movie->num_htk + movie->num_vtk); i++) { mj2_tk_t *tk = &movie->tk[i]; for (j = 0; j < tk->num_samples; j++) { movie->duration += tk->sample[j].sample_delta; } } cio_write(movie->duration, 4); cio_write(movie->rate << 16, 4); /* Rate to play presentation */ cio_write(movie->volume << 8, 2); /* Volume */ cio_write(0, 2); /* Reserved */ cio_write(0, 4); /* Reserved */ cio_write(0, 4); /* Reserved */ cio_write(movie->trans_matrix[0], 4); /* Transformation matrix for video */ cio_write(movie->trans_matrix[1], 4); cio_write(movie->trans_matrix[2], 4); cio_write(movie->trans_matrix[3], 4); cio_write(movie->trans_matrix[4], 4); cio_write(movie->trans_matrix[5], 4); cio_write(movie->trans_matrix[6], 4); cio_write(movie->trans_matrix[7], 4); cio_write(movie->trans_matrix[8], 4); cio_write(0, 4); /* Pre-defined */ cio_write(0, 4); /* Pre-defined */ cio_write(0, 4); /* Pre-defined */ cio_write(0, 4); /* Pre-defined */ cio_write(0, 4); /* Pre-defined */ cio_write(0, 4); /* Pre-defined */ for (i = 0; i < movie->num_htk + movie->num_stk + movie->num_vtk; i++) { if (max_tk_num < movie->tk[i].track_ID) max_tk_num = movie->tk[i].track_ID; } movie->next_tk_id = max_tk_num + 1; cio_write(movie->next_tk_id, 4); /* ID of Next track to be added */ box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the MVHD box * * Movie header Box * */ int mj2_read_mvhd(mj2_movie_t * movie) { mj2_box_t box; mj2_read_boxhdr(&box); if (MJ2_MVHD != box.type) { fprintf(stderr, "Error: Expected MVHD Marker\n"); return 1; } if (0 != cio_read(4)) { /* Version = 0, flags = 0 */ fprintf(stderr, "Error: Only Version 0 handled\n"); } movie->creation_time = cio_read(4); /* Creation Time */ movie->modification_time = cio_read(4); /* Modification Time */ movie->timescale = cio_read(4); /* Timescale */ movie->duration = cio_read(4); /* Duration */ movie->rate = cio_read(4) >> 16; /* Rate to play presentation */ movie->volume = cio_read(2) >> 8; /* Volume */ cio_skip(10); /* Reserved */ movie->trans_matrix[0] = cio_read(4); /* Transformation matrix for video */ movie->trans_matrix[1] = cio_read(4); movie->trans_matrix[2] = cio_read(4); movie->trans_matrix[3] = cio_read(4); movie->trans_matrix[4] = cio_read(4); movie->trans_matrix[5] = cio_read(4); movie->trans_matrix[6] = cio_read(4); movie->trans_matrix[7] = cio_read(4); movie->trans_matrix[8] = cio_read(4); cio_skip(24); /* Pre-defined */ movie->next_tk_id = cio_read(4); /* ID of Next track to be added */ if (cio_tell() - box.init_pos != box.length) { fprintf(stderr, "Error with MVHD Box Size\n"); return 1; } return 0; } /* * Write the MOOV box * * Movie Box * */ void mj2_write_moov(mj2_movie_t * movie, j2k_image_t * img) { int i; mj2_box_t box; box.init_pos = cio_tell(); cio_skip(4); cio_write(MJ2_MOOV, 4); /* MOOV */ mj2_write_mvhd(movie); for (i = 0; i < (movie->num_stk + movie->num_htk + movie->num_vtk); i++) { mj2_write_trak(&movie->tk[i], img); } box.length = cio_tell() - box.init_pos; cio_seek(box.init_pos); cio_write(box.length, 4); /* L */ cio_seek(box.init_pos + box.length); } /* * Read the MOOV box * * Movie Box * */ int mj2_read_moov(mj2_movie_t * movie, j2k_image_t * img) { unsigned int i; mj2_box_t box; mj2_box_t box2; mj2_read_boxhdr(&box); if (MJ2_MOOV != box.type) { fprintf(stderr, "Error: Expected MOOV Marker\n"); return 1; } if (mj2_read_mvhd(movie)) return 1; movie->tk = (mj2_tk_t *) malloc((movie->next_tk_id - 1) * sizeof(mj2_tk_t)); for (i=0; i < (unsigned int)movie->next_tk_id - 1; i++) movie->tk[i].imagefile = NULL; for (i = 0; cio_tell() - box.init_pos < box.length; i++) { mj2_read_boxhdr(&box2); if (box2.type == MJ2_TRAK) { cio_seek(box2.init_pos); if (mj2_read_trak(&movie->tk[i], img)) return 1; if (movie->tk[i].track_type == 0) { movie->num_vtk++; } else if (movie->tk[i].track_type == 1) { movie->num_stk++; } else if (movie->tk[i].track_type == 2) { movie->num_htk++; } } else if (box2.type == MJ2_MVEX) { cio_seek(box2.init_pos); cio_skip(box2.length); i--; } else { fprintf(stderr, "Error with MOOV Box: Expected TRAK or MVEX box\n"); return 1; } } return 0; } int mj2_encode(mj2_movie_t * movie, j2k_cp_t * cp, char *index) { char *outbuf=NULL; FILE *outfile=NULL; int len; unsigned int i; j2k_image_t img; outbuf = (char *) malloc(cp->tdx * cp->tdy * 2); cio_init(outbuf, cp->tdx * cp->tdy * 2); outfile = fopen(movie->mj2file, "wb"); if (!outfile) { fprintf(stderr, "failed to open %s for writing\n", movie->mj2file); return 1; } mj2_write_jp(); mj2_write_ftyp(movie); if (mj2_write_mdat(outfile, movie, &img, cp, outbuf, index)) { fprintf(stderr, "Error writing tracks\n\n"); return 1; } outbuf = (char *) malloc(cp->tdx * cp->tdy * 2); cio_init(outbuf, cp->tdx * cp->tdy * 2); mj2_write_moov(movie, &img); len = cio_tell(); fwrite(outbuf, 1, len, outfile); fclose(outfile); for (i = 0; i < movie->tk[0].jp2_struct.numcomps; i++) { char tmp[20]; sprintf(tmp, "Compo%d", i); if (remove(tmp) == -1) { fprintf(stderr, "failed to kill %s file !\n", tmp); } } free(img.comps); free(outbuf); return 0; } int mj2_decode(unsigned char *src, int len, mj2_movie_t * movie, j2k_cp_t * cp, char *outfile) { unsigned int MDATbox_pos = 0; unsigned int MOOVboxend_pos = 0; mj2_box_t box; j2k_image_t img; cio_init(src, len); if (mj2_read_jp()) return 1; if (mj2_read_ftyp(movie)) return 1; for (; cio_numbytesleft() > 0;) { mj2_read_boxhdr(&box); switch (box.type) { case MJ2_MDAT: cio_seek(box.init_pos); if (MOOVboxend_pos == 0) { MDATbox_pos = box.init_pos; cio_skip(box.length); /* The MDAT box is only read while the MOOV box is decoded */ } else { if (mj2_read_mdat(movie, src, outfile)) return 1; } break; case MJ2_MOOV: cio_seek(box.init_pos); if (mj2_read_moov(movie, &img)) return 1; MOOVboxend_pos = cio_tell(); if (MDATbox_pos != 0) { cio_seek(MDATbox_pos); /* After MOOV box, read the MDAT box */ if (mj2_read_mdat(movie, src, outfile)) return 1; cio_seek(MOOVboxend_pos); } break; case MJ2_MOOF: cio_seek(box.init_pos); cio_skip(box.length); break; case MJ2_FREE: cio_seek(box.init_pos); cio_skip(box.length); break; case MJ2_SKIP: cio_seek(box.init_pos); cio_skip(box.length); break; default: fprintf(stderr, "Unknown box\n"); return 1; } } return 0; }