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openjpeg/mj2/MJ2_codec/mj2.c

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/*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <math.h>
#include "mj2.h"
#include <cio.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->track_type == 0) {// Video track
if (tk->jp2_struct.comps != 0)
free(tk->jp2_struct.comps);
if (tk->jp2_struct.cl != 0)
free(tk->jp2_struct.cl);
if (tk->num_jp2x != 0)
free(tk->jp2xdata);
}
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_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);
if (box->length == 0)
box->length = cio_numbytesleft() + 12;
}
else if (box->length == 0) {
box->length = cio_numbytesleft() + 8;
}
return 0;
}
/*
*
* Initialisation of a Standard Movie, given a simple movie structure defined by the user
* The movie will have one sample per chunk
*
* Arguments: mj2_movie_t * movie
* Several variables of "movie" must be defined in order to enable a correct execution of
* this function:
* - The number of tracks of each type (movie->num_vtk, movie->num_stk, movie->num_htk)
* - The memory for each must be allocated (movie->tk)
* - For each track:
* The track type (tk->track_type)
* The number of sample (tk->num_samples)
* The sample rate (tk->sample_rate)
*
*/
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(&ltime); /* 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 << 16; /* Rate to play presentation (default = 0x00010000) */
movie->volume = 1 << 8; /* 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;
movie->next_tk_id = 1;
for (i = 0; i < movie->num_htk + movie->num_stk + movie->num_vtk; i++) {
mj2_tk_t *tk = &movie->tk[i];
movie->next_tk_id++;
tk->jp2_struct.comps = NULL;
tk->jp2_struct.cl = NULL;
if (tk->track_type == 0) {
if (tk->num_samples == 0)
return 1;
tk->Dim[0] = 0;
tk->Dim[1] = 0;
tk->timescale = 1000; /* Timescale = 1 ms */
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;
if (tk->sample_rate == 0) {
fprintf(stderr,"Error while initializing MJ2 movie: Sample rate of track %d must be different from zero\n",tk->track_ID);
return 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 << 8; /* Movie volume (default = 0x0100) */
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;
tk->visual_w = tk->w << 16;
tk->visual_h = tk->h << 16;
}
else {
tk->num_br = 0;
tk->jp2xdata = NULL;
}
}
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 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(mj2_tk_t * tk)
{
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);
cio_write(tk->depth, 2); /* Depth */
cio_write(0xffff, 2); /* Pre-defined = -1 */
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;
}
tk->jp2_struct.comps = (jp2_comps_t *) malloc(tk->jp2_struct.numcomps * sizeof(jp2_comps_t));
tk->jp2_struct.cl = (int *) malloc(sizeof(int));
tk->num_br = 0;
tk->num_jp2x = 0;
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)
{
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(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)
{
mj2_box_t box;
box.init_pos = cio_tell();
cio_skip(4);
cio_write(MJ2_STBL, 4); /* STBL */
mj2_write_stsd(tk);
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, 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 SMHD box\n");
return 1;
}
if (0 != cio_read(3)) { /* Flags = 0 */
fprintf(stderr, "Error with flag in SMHD box. Expected flag 0\n");
return 1;
}
tk->track_type = 1;
tk->balance = cio_read(2);
/* Init variables to zero to avoid problems when freeeing memory
The values will possibly be overidded when decoding the track structure */
tk->num_br = 0;
tk->num_url = 0;
tk->num_urn = 0;
tk->num_chunks = 0;
tk->num_tts = 0;
tk->num_samplestochunk = 0;
tk->num_samples = 0;
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 HMHD box\n");
return 1;
}
if (0 != cio_read(3)) { /* Flags = 0 */
fprintf(stderr, "Error with flag in HMHD 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);
/* Init variables to zero to avoid problems when freeeing memory
The values will possibly be overidded when decoding the track structure */
tk->num_br = 0;
tk->num_url = 0;
tk->num_urn = 0;
tk->num_chunks = 0;
tk->num_tts = 0;
tk->num_samplestochunk = 0;
tk->num_samples = 0;
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)
{
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);
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 HDLR box\n");
return 1;
}
if (0 != cio_read(3)) { /* Flags = 0 */
fprintf(stderr, "Error with flag in HDLR 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(&ltime); /* 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)
{
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);
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(&ltime); /* 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, 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->visual_w, 4); /* Video Visual Width */
cio_write(tk->visual_h, 4); /* Video Visual 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); /* 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->visual_w = cio_read(4); /* Video Visual Width */
tk->visual_h = cio_read(4); /* Video Visual 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)
{
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);
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(&ltime); /* 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, 4); /* Rate to play presentation */
cio_write(movie->volume, 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 in MVHD box\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); /* Rate to play presentation */
movie->volume = cio_read(2); /* 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)
{
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]);
}
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; 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_read_struct(FILE *file, mj2_movie_t * movie) {
mj2_box_t box;
j2k_image_t img;
char * src;
int fsresult;
int foffset;
movie->num_vtk=0;
movie->num_stk=0;
movie->num_htk=0;
src = (char*) malloc (300 * sizeof(char));
fread(src,300,1, file); // Assuming that jp and ftyp markers size do
// not exceed 300 bytes
cio_init(src, 300);
if (mj2_read_jp())
return 1;
if (mj2_read_ftyp(movie))
return 1;
fsresult = fseek(file,cio_tell(),SEEK_SET);
if( fsresult ) {
fprintf(stderr, "End of file reached while trying to read data after FTYP box\n" );
return 1;
}
foffset = cio_tell();
box.type = 0;
fread(src,30,1,file);
cio_init(src, 30);
mj2_read_boxhdr(&box);
while(box.type != MJ2_MOOV) {
switch(box.type)
{
case MJ2_MDAT:
fsresult = fseek(file,foffset+box.length,SEEK_SET);
if( fsresult ) {
fprintf(stderr, "End of file reached while trying to read MDAT box\n" );
return 1;
}
foffset += box.length;
break;
case MJ2_MOOF:
fsresult = fseek(file,foffset+box.length,SEEK_SET);
if( fsresult ) {
fprintf(stderr, "End of file reached while trying to read MOOF box\n" );
return 1;
}
foffset += box.length;
break;
case MJ2_FREE:
fsresult = fseek(file,foffset+box.length,SEEK_SET);
if( fsresult ) {
fprintf(stderr, "End of file reached while trying to read FREE box\n" );
return 1;
}
foffset += box.length;
break;
case MJ2_SKIP:
fsresult = fseek(file,foffset+box.length,SEEK_SET);
if( fsresult ) {
fprintf(stderr, "End of file reached while trying to read SKIP box\n" );
return 1;
}
foffset += box.length;
break;
default:
fprintf(stderr, "Unknown box in MJ2 stream\n");
fsresult = fseek(file,foffset+box.length,SEEK_SET);
if( fsresult ) {
fprintf(stderr, "End of file reached while trying to read end of unknown box\n");
return 1;
}
foffset += box.length;
break;
}
fsresult = fread(src,8,1,file);
if (fsresult != 1) {
fprintf(stderr, "MOOV box not found in file\n");
return 1;
}
cio_init(src, 8);
mj2_read_boxhdr(&box);
}
fseek(file,foffset,SEEK_SET);
src = realloc(src,box.length);
fsresult = fread(src,box.length,1,file);
if (fsresult != 1) {
fprintf(stderr, "End of file reached while trying to read MOOV box\n");
return 1;
}
cio_init(src, box.length);
if (mj2_read_moov(movie, &img))
return 1;
free(src);
return 0;
}
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