[libav.git] / tools / qt-faststart.c

/*
 * qt-faststart.c, v0.2
 * by Mike Melanson (melanson@pcisys.net)
 * This file is placed in the public domain. Use the program however you
 * see fit.
 *
 * This utility rearranges a Quicktime file such that the moov atom
 * is in front of the data, thus facilitating network streaming.
 *
 * To compile this program, start from the base directory from which you
 * are building Libav and type:
 *  make tools/qt-faststart
 * The qt-faststart program will be built in the tools/ directory. If you
 * do not build the program in this manner, correct results are not
 * guaranteed, particularly on 64-bit platforms.
 * Invoke the program with:
 *  qt-faststart <infile.mov> <outfile.mov>
 *
 * Notes: Quicktime files can come in many configurations of top-level
 * atoms. This utility stipulates that the very last atom in the file needs
 * to be a moov atom. When given such a file, this utility will rearrange
 * the top-level atoms by shifting the moov atom from the back of the file
 * to the front, and patch the chunk offsets along the way. This utility
 * presently only operates on uncompressed moov atoms.
 */

#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <string.h>

#ifdef __MINGW32__
#define fseeko(x, y, z) fseeko64(x, y, z)
#define ftello(x)       ftello64(x)
#elif defined(_WIN32)
#define fseeko(x, y, z) _fseeki64(x, y, z)
#define ftello(x)       _ftelli64(x)
#endif

#define BE_16(x) ((((uint8_t*)(x))[0] <<  8) | ((uint8_t*)(x))[1])

#define BE_32(x) ((((uint8_t*)(x))[0] << 24) |  \
                  (((uint8_t*)(x))[1] << 16) |  \
                  (((uint8_t*)(x))[2] <<  8) |  \
                   ((uint8_t*)(x))[3])

#define BE_64(x) (((uint64_t)(((uint8_t*)(x))[0]) << 56) |  \
                  ((uint64_t)(((uint8_t*)(x))[1]) << 48) |  \
                  ((uint64_t)(((uint8_t*)(x))[2]) << 40) |  \
                  ((uint64_t)(((uint8_t*)(x))[3]) << 32) |  \
                  ((uint64_t)(((uint8_t*)(x))[4]) << 24) |  \
                  ((uint64_t)(((uint8_t*)(x))[5]) << 16) |  \
                  ((uint64_t)(((uint8_t*)(x))[6]) <<  8) |  \
                  ((uint64_t)( (uint8_t*)(x))[7]))

#define BE_FOURCC(ch0, ch1, ch2, ch3)           \
    ( (uint32_t)(unsigned char)(ch3)        |   \
     ((uint32_t)(unsigned char)(ch2) <<  8) |   \
     ((uint32_t)(unsigned char)(ch1) << 16) |   \
     ((uint32_t)(unsigned char)(ch0) << 24) )

#define QT_ATOM BE_FOURCC
/* top level atoms */
#define FREE_ATOM QT_ATOM('f', 'r', 'e', 'e')
#define JUNK_ATOM QT_ATOM('j', 'u', 'n', 'k')
#define MDAT_ATOM QT_ATOM('m', 'd', 'a', 't')
#define MOOV_ATOM QT_ATOM('m', 'o', 'o', 'v')
#define PNOT_ATOM QT_ATOM('p', 'n', 'o', 't')
#define SKIP_ATOM QT_ATOM('s', 'k', 'i', 'p')
#define WIDE_ATOM QT_ATOM('w', 'i', 'd', 'e')
#define PICT_ATOM QT_ATOM('P', 'I', 'C', 'T')
#define FTYP_ATOM QT_ATOM('f', 't', 'y', 'p')
#define UUID_ATOM QT_ATOM('u', 'u', 'i', 'd')

#define CMOV_ATOM QT_ATOM('c', 'm', 'o', 'v')
#define STCO_ATOM QT_ATOM('s', 't', 'c', 'o')
#define CO64_ATOM QT_ATOM('c', 'o', '6', '4')

#define ATOM_PREAMBLE_SIZE    8
#define COPY_BUFFER_SIZE   1024

int main(int argc, char *argv[])
{
    FILE *infile  = NULL;
    FILE *outfile = NULL;
    unsigned char atom_bytes[ATOM_PREAMBLE_SIZE];
    uint32_t atom_type   = 0;
    uint64_t atom_size   = 0;
    uint64_t atom_offset = 0;
    uint64_t last_offset;
    unsigned char *moov_atom = NULL;
    unsigned char *ftyp_atom = NULL;
    uint64_t moov_atom_size;
    uint64_t ftyp_atom_size = 0;
    uint64_t i, j;
    uint32_t offset_count;
    uint64_t current_offset;
    uint64_t start_offset = 0;
    unsigned char copy_buffer[COPY_BUFFER_SIZE];
    int bytes_to_copy;

    if (argc != 3) {
        printf("Usage: qt-faststart <infile.mov> <outfile.mov>\n");
        return 0;
    }

    if (!strcmp(argv[1], argv[2])) {
        fprintf(stderr, "input and output files need to be different\n");
        return 1;
    }

    infile = fopen(argv[1], "rb");
    if (!infile) {
        perror(argv[1]);
        goto error_out;
    }

    /* traverse through the atoms in the file to make sure that 'moov' is
     * at the end */
    while (!feof(infile)) {
        if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
            break;
        }
        atom_size = (uint32_t) BE_32(&atom_bytes[0]);
        atom_type = BE_32(&atom_bytes[4]);

        /* keep ftyp atom */
        if (atom_type == FTYP_ATOM) {
            ftyp_atom_size = atom_size;
            free(ftyp_atom);
            ftyp_atom = malloc(ftyp_atom_size);
            if (!ftyp_atom) {
                printf("could not allocate %"PRIu64" bytes for ftyp atom\n",
                       atom_size);
                goto error_out;
            }
            fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR);
            if (fread(ftyp_atom, atom_size, 1, infile) != 1) {
                perror(argv[1]);
                goto error_out;
            }
            start_offset = ftello(infile);
        } else {
            /* 64-bit special case */
            if (atom_size == 1) {
                if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
                    break;
                }
                atom_size = BE_64(&atom_bytes[0]);
                fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
            } else {
                fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
            }
        }
        printf("%c%c%c%c %10"PRIu64" %"PRIu64"\n",
               (atom_type >> 24) & 255,
               (atom_type >> 16) & 255,
               (atom_type >>  8) & 255,
               (atom_type >>  0) & 255,
               atom_offset,
               atom_size);
        if ((atom_type != FREE_ATOM) &&
            (atom_type != JUNK_ATOM) &&
            (atom_type != MDAT_ATOM) &&
            (atom_type != MOOV_ATOM) &&
            (atom_type != PNOT_ATOM) &&
            (atom_type != SKIP_ATOM) &&
            (atom_type != WIDE_ATOM) &&
            (atom_type != PICT_ATOM) &&
            (atom_type != UUID_ATOM) &&
            (atom_type != FTYP_ATOM)) {
            printf("encountered non-QT top-level atom (is this a QuickTime file?)\n");
            break;
        }
        atom_offset += atom_size;

        /* The atom header is 8 (or 16 bytes), if the atom size (which
         * includes these 8 or 16 bytes) is less than that, we won't be
         * able to continue scanning sensibly after this atom, so break. */
        if (atom_size < 8)
            break;
    }

    if (atom_type != MOOV_ATOM) {
        printf("last atom in file was not a moov atom\n");
        free(ftyp_atom);
        fclose(infile);
        return 0;
    }

    /* moov atom was, in fact, the last atom in the chunk; load the whole
     * moov atom */
    fseeko(infile, -atom_size, SEEK_END);
    last_offset    = ftello(infile);
    moov_atom_size = atom_size;
    moov_atom      = malloc(moov_atom_size);
    if (!moov_atom) {
        printf("could not allocate %"PRIu64" bytes for moov atom\n", atom_size);
        goto error_out;
    }
    if (fread(moov_atom, atom_size, 1, infile) != 1) {
        perror(argv[1]);
        goto error_out;
    }

    /* this utility does not support compressed atoms yet, so disqualify
     * files with compressed QT atoms */
    if (BE_32(&moov_atom[12]) == CMOV_ATOM) {
        printf("this utility does not support compressed moov atoms yet\n");
        goto error_out;
    }

    /* close; will be re-opened later */
    fclose(infile);
    infile = NULL;

    /* crawl through the moov chunk in search of stco or co64 atoms */
    for (i = 4; i < moov_atom_size - 4; i++) {
        atom_type = BE_32(&moov_atom[i]);
        if (atom_type == STCO_ATOM) {
            printf(" patching stco atom...\n");
            atom_size = BE_32(&moov_atom[i - 4]);
            if (i + atom_size - 4 > moov_atom_size) {
                printf(" bad atom size\n");
                goto error_out;
            }
            offset_count = BE_32(&moov_atom[i + 8]);
            for (j = 0; j < offset_count; j++) {
                current_offset  = BE_32(&moov_atom[i + 12 + j * 4]);
                current_offset += moov_atom_size;
                moov_atom[i + 12 + j * 4 + 0] = (current_offset >> 24) & 0xFF;
                moov_atom[i + 12 + j * 4 + 1] = (current_offset >> 16) & 0xFF;
                moov_atom[i + 12 + j * 4 + 2] = (current_offset >>  8) & 0xFF;
                moov_atom[i + 12 + j * 4 + 3] = (current_offset >>  0) & 0xFF;
            }
            i += atom_size - 4;
        } else if (atom_type == CO64_ATOM) {
            printf(" patching co64 atom...\n");
            atom_size = BE_32(&moov_atom[i - 4]);
            if (i + atom_size - 4 > moov_atom_size) {
                printf(" bad atom size\n");
                goto error_out;
            }
            offset_count = BE_32(&moov_atom[i + 8]);
            for (j = 0; j < offset_count; j++) {
                current_offset  = BE_64(&moov_atom[i + 12 + j * 8]);
                current_offset += moov_atom_size;
                moov_atom[i + 12 + j * 8 + 0] = (current_offset >> 56) & 0xFF;
                moov_atom[i + 12 + j * 8 + 1] = (current_offset >> 48) & 0xFF;
                moov_atom[i + 12 + j * 8 + 2] = (current_offset >> 40) & 0xFF;
                moov_atom[i + 12 + j * 8 + 3] = (current_offset >> 32) & 0xFF;
                moov_atom[i + 12 + j * 8 + 4] = (current_offset >> 24) & 0xFF;
                moov_atom[i + 12 + j * 8 + 5] = (current_offset >> 16) & 0xFF;
                moov_atom[i + 12 + j * 8 + 6] = (current_offset >>  8) & 0xFF;
                moov_atom[i + 12 + j * 8 + 7] = (current_offset >>  0) & 0xFF;
            }
            i += atom_size - 4;
        }
    }

    /* re-open the input file and open the output file */
    infile = fopen(argv[1], "rb");
    if (!infile) {
        perror(argv[1]);
        goto error_out;
    }

    if (start_offset > 0) { /* seek after ftyp atom */
        fseeko(infile, start_offset, SEEK_SET);
        last_offset -= start_offset;
    }

    outfile = fopen(argv[2], "wb");
    if (!outfile) {
        perror(argv[2]);
        goto error_out;
    }

    /* dump the same ftyp atom */
    if (ftyp_atom_size > 0) {
        printf(" writing ftyp atom...\n");
        if (fwrite(ftyp_atom, ftyp_atom_size, 1, outfile) != 1) {
            perror(argv[2]);
            goto error_out;
        }
    }

    /* dump the new moov atom */
    printf(" writing moov atom...\n");
    if (fwrite(moov_atom, moov_atom_size, 1, outfile) != 1) {
        perror(argv[2]);
        goto error_out;
    }

    /* copy the remainder of the infile, from offset 0 -> last_offset - 1 */
    printf(" copying rest of file...\n");
    while (last_offset) {
        if (last_offset > COPY_BUFFER_SIZE)
            bytes_to_copy = COPY_BUFFER_SIZE;
        else
            bytes_to_copy = last_offset;

        if (fread(copy_buffer, bytes_to_copy, 1, infile) != 1) {
            perror(argv[1]);
            goto error_out;
        }
        if (fwrite(copy_buffer, bytes_to_copy, 1, outfile) != 1) {
            perror(argv[2]);
            goto error_out;
        }
        last_offset -= bytes_to_copy;
    }

    fclose(infile);
    fclose(outfile);
    free(moov_atom);
    free(ftyp_atom);

    return 0;

error_out:
    if (infile)
        fclose(infile);
    if (outfile)
        fclose(outfile);
    free(moov_atom);
    free(ftyp_atom);
    return 1;
}
Commit	Line	Data
38100e8c	1	/*
31457d7a	2	* qt-faststart.c, v0.2
38100e8c MM	3	* by Mike Melanson (melanson@pcisys.net)
	4	* This file is placed in the public domain. Use the program however you
	5	* see fit.
	6	*
	7	* This utility rearranges a Quicktime file such that the moov atom
	8	* is in front of the data, thus facilitating network streaming.
	9	*
3c16e03d	10	* To compile this program, start from the base directory from which you
2912e87a	11	* are building Libav and type:
3c16e03d MM	12	* make tools/qt-faststart
	13	* The qt-faststart program will be built in the tools/ directory. If you
	14	* do not build the program in this manner, correct results are not
	15	* guaranteed, particularly on 64-bit platforms.
38100e8c MM	16	* Invoke the program with:
	17	* qt-faststart <infile.mov> <outfile.mov>
	18	*
	19	* Notes: Quicktime files can come in many configurations of top-level
	20	* atoms. This utility stipulates that the very last atom in the file needs
	21	* to be a moov atom. When given such a file, this utility will rearrange
	22	* the top-level atoms by shifting the moov atom from the back of the file
	23	* to the front, and patch the chunk offsets along the way. This utility
	24	* presently only operates on uncompressed moov atoms.
	25	*/
	26
	27	#include <stdio.h>
	28	#include <stdlib.h>
	29	#include <inttypes.h>
91a4abd8	30	#include <string.h>
38100e8c	31
a8fcaf40	32	#ifdef __MINGW32__
cd8d8457 DB	33	#define fseeko(x, y, z) fseeko64(x, y, z)
cd8d8457 DB	34	#define ftello(x) ftello64(x)
dd4169ab MS	35	#elif defined(_WIN32)
	36	#define fseeko(x, y, z) _fseeki64(x, y, z)
	37	#define ftello(x) _ftelli64(x)
a8fcaf40 SH	38	#endif
a8fcaf40 SH	39
cd8d8457 DB	40	#define BE_16(x) ((((uint8_t)(x))[0] << 8) \| ((uint8_t)(x))[1])
	41
	42	#define BE_32(x) ((((uint8_t*)(x))[0] << 24) \| \
	43	(((uint8_t*)(x))[1] << 16) \| \
	44	(((uint8_t*)(x))[2] << 8) \| \
38100e8c	45	((uint8_t*)(x))[3])
cd8d8457 DB	46
	47	#define BE_64(x) (((uint64_t)(((uint8_t*)(x))[0]) << 56) \| \
	48	((uint64_t)(((uint8_t*)(x))[1]) << 48) \| \
	49	((uint64_t)(((uint8_t*)(x))[2]) << 40) \| \
	50	((uint64_t)(((uint8_t*)(x))[3]) << 32) \| \
	51	((uint64_t)(((uint8_t*)(x))[4]) << 24) \| \
	52	((uint64_t)(((uint8_t*)(x))[5]) << 16) \| \
	53	((uint64_t)(((uint8_t*)(x))[6]) << 8) \| \
	54	((uint64_t)( (uint8_t*)(x))[7]))
	55
	56	#define BE_FOURCC(ch0, ch1, ch2, ch3) \
	57	( (uint32_t)(unsigned char)(ch3) \| \
	58	((uint32_t)(unsigned char)(ch2) << 8) \| \
	59	((uint32_t)(unsigned char)(ch1) << 16) \| \
	60	((uint32_t)(unsigned char)(ch0) << 24) )
38100e8c MM	61
	62	#define QT_ATOM BE_FOURCC
	63	/* top level atoms */
	64	#define FREE_ATOM QT_ATOM('f', 'r', 'e', 'e')
	65	#define JUNK_ATOM QT_ATOM('j', 'u', 'n', 'k')
	66	#define MDAT_ATOM QT_ATOM('m', 'd', 'a', 't')
	67	#define MOOV_ATOM QT_ATOM('m', 'o', 'o', 'v')
	68	#define PNOT_ATOM QT_ATOM('p', 'n', 'o', 't')
	69	#define SKIP_ATOM QT_ATOM('s', 'k', 'i', 'p')
	70	#define WIDE_ATOM QT_ATOM('w', 'i', 'd', 'e')
	71	#define PICT_ATOM QT_ATOM('P', 'I', 'C', 'T')
	72	#define FTYP_ATOM QT_ATOM('f', 't', 'y', 'p')
31457d7a	73	#define UUID_ATOM QT_ATOM('u', 'u', 'i', 'd')
38100e8c MM	74
	75	#define CMOV_ATOM QT_ATOM('c', 'm', 'o', 'v')
	76	#define STCO_ATOM QT_ATOM('s', 't', 'c', 'o')
	77	#define CO64_ATOM QT_ATOM('c', 'o', '6', '4')
	78
cd8d8457 DB	79	#define ATOM_PREAMBLE_SIZE 8
cd8d8457 DB	80	#define COPY_BUFFER_SIZE 1024
38100e8c MM	81
	82	int main(int argc, char *argv[])
	83	{
c937454d MS	84	FILE *infile = NULL;
c937454d MS	85	FILE *outfile = NULL;
38100e8c	86	unsigned char atom_bytes[ATOM_PREAMBLE_SIZE];
cd8d8457 DB	87	uint32_t atom_type = 0;
cd8d8457 DB	88	uint64_t atom_size = 0;
65b875d8	89	uint64_t atom_offset = 0;
38100e8c	90	uint64_t last_offset;
c937454d	91	unsigned char *moov_atom = NULL;
2ef9fd8e	92	unsigned char *ftyp_atom = NULL;
38100e8c	93	uint64_t moov_atom_size;
60a9cc58	94	uint64_t ftyp_atom_size = 0;
38100e8c MM	95	uint64_t i, j;
	96	uint32_t offset_count;
	97	uint64_t current_offset;
60a9cc58	98	uint64_t start_offset = 0;
38100e8c MM	99	unsigned char copy_buffer[COPY_BUFFER_SIZE];
	100	int bytes_to_copy;
	101
	102	if (argc != 3) {
cd8d8457	103	printf("Usage: qt-faststart <infile.mov> <outfile.mov>\n");
38100e8c MM	104	return 0;
	105	}
	106
91a4abd8 BC	107	if (!strcmp(argv[1], argv[2])) {
	108	fprintf(stderr, "input and output files need to be different\n");
	109	return 1;
	110	}
	111
38100e8c MM	112	infile = fopen(argv[1], "rb");
	113	if (!infile) {
	114	perror(argv[1]);
c937454d	115	goto error_out;
38100e8c MM	116	}
	117
	118	/* traverse through the atoms in the file to make sure that 'moov' is
	119	* at the end */
	120	while (!feof(infile)) {
	121	if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
	122	break;
	123	}
cd8d8457	124	atom_size = (uint32_t) BE_32(&atom_bytes[0]);
38100e8c MM	125	atom_type = BE_32(&atom_bytes[4]);
38100e8c MM	126
60a9cc58 BC	127	/* keep ftyp atom */
	128	if (atom_type == FTYP_ATOM) {
	129	ftyp_atom_size = atom_size;
6ad533b7	130	free(ftyp_atom);
60a9cc58 BC	131	ftyp_atom = malloc(ftyp_atom_size);
60a9cc58 BC	132	if (!ftyp_atom) {
cd8d8457 DB	133	printf("could not allocate %"PRIu64" bytes for ftyp atom\n",
cd8d8457 DB	134	atom_size);
c937454d	135	goto error_out;
60a9cc58 BC	136	}
	137	fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR);
	138	if (fread(ftyp_atom, atom_size, 1, infile) != 1) {
	139	perror(argv[1]);
c937454d	140	goto error_out;
60a9cc58 BC	141	}
60a9cc58 BC	142	start_offset = ftello(infile);
65b875d8	143	} else {
cf4afe0b MS	144	/* 64-bit special case */
	145	if (atom_size == 1) {
	146	if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
	147	break;
	148	}
	149	atom_size = BE_64(&atom_bytes[0]);
	150	fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE * 2, SEEK_CUR);
	151	} else {
	152	fseeko(infile, atom_size - ATOM_PREAMBLE_SIZE, SEEK_CUR);
38100e8c	153	}
38100e8c	154	}
65b875d8 FB	155	printf("%c%c%c%c %10"PRIu64" %"PRIu64"\n",
	156	(atom_type >> 24) & 255,
	157	(atom_type >> 16) & 255,
	158	(atom_type >> 8) & 255,
	159	(atom_type >> 0) & 255,
	160	atom_offset,
	161	atom_size);
	162	if ((atom_type != FREE_ATOM) &&
	163	(atom_type != JUNK_ATOM) &&
	164	(atom_type != MDAT_ATOM) &&
	165	(atom_type != MOOV_ATOM) &&
	166	(atom_type != PNOT_ATOM) &&
	167	(atom_type != SKIP_ATOM) &&
	168	(atom_type != WIDE_ATOM) &&
	169	(atom_type != PICT_ATOM) &&
	170	(atom_type != UUID_ATOM) &&
	171	(atom_type != FTYP_ATOM)) {
cd8d8457	172	printf("encountered non-QT top-level atom (is this a QuickTime file?)\n");
65b875d8 FB	173	break;
	174	}
	175	atom_offset += atom_size;
86e09922 MS	176
	177	/* The atom header is 8 (or 16 bytes), if the atom size (which
	178	* includes these 8 or 16 bytes) is less than that, we won't be
	179	* able to continue scanning sensibly after this atom, so break. */
	180	if (atom_size < 8)
	181	break;
65b875d8	182	}
38100e8c MM	183
38100e8c MM	184	if (atom_type != MOOV_ATOM) {
cd8d8457	185	printf("last atom in file was not a moov atom\n");
d296a658	186	free(ftyp_atom);
38100e8c MM	187	fclose(infile);
	188	return 0;
	189	}
	190
	191	/* moov atom was, in fact, the last atom in the chunk; load the whole
	192	* moov atom */
e2daf554	193	fseeko(infile, -atom_size, SEEK_END);
cd8d8457	194	last_offset = ftello(infile);
38100e8c	195	moov_atom_size = atom_size;
cd8d8457	196	moov_atom = malloc(moov_atom_size);
38100e8c	197	if (!moov_atom) {
cd8d8457	198	printf("could not allocate %"PRIu64" bytes for moov atom\n", atom_size);
c937454d	199	goto error_out;
38100e8c MM	200	}
	201	if (fread(moov_atom, atom_size, 1, infile) != 1) {
	202	perror(argv[1]);
c937454d	203	goto error_out;
38100e8c MM	204	}
	205
	206	/* this utility does not support compressed atoms yet, so disqualify
	207	* files with compressed QT atoms */
	208	if (BE_32(&moov_atom[12]) == CMOV_ATOM) {
cd8d8457	209	printf("this utility does not support compressed moov atoms yet\n");
c937454d	210	goto error_out;
38100e8c MM	211	}
	212
	213	/* close; will be re-opened later */
	214	fclose(infile);
c937454d	215	infile = NULL;
38100e8c MM	216
	217	/* crawl through the moov chunk in search of stco or co64 atoms */
	218	for (i = 4; i < moov_atom_size - 4; i++) {
	219	atom_type = BE_32(&moov_atom[i]);
	220	if (atom_type == STCO_ATOM) {
cd8d8457	221	printf(" patching stco atom...\n");
38100e8c MM	222	atom_size = BE_32(&moov_atom[i - 4]);
38100e8c MM	223	if (i + atom_size - 4 > moov_atom_size) {
cd8d8457	224	printf(" bad atom size\n");
c937454d	225	goto error_out;
38100e8c MM	226	}
	227	offset_count = BE_32(&moov_atom[i + 8]);
	228	for (j = 0; j < offset_count; j++) {
cd8d8457	229	current_offset = BE_32(&moov_atom[i + 12 + j * 4]);
38100e8c MM	230	current_offset += moov_atom_size;
	231	moov_atom[i + 12 + j * 4 + 0] = (current_offset >> 24) & 0xFF;
	232	moov_atom[i + 12 + j * 4 + 1] = (current_offset >> 16) & 0xFF;
	233	moov_atom[i + 12 + j * 4 + 2] = (current_offset >> 8) & 0xFF;
	234	moov_atom[i + 12 + j * 4 + 3] = (current_offset >> 0) & 0xFF;
	235	}
	236	i += atom_size - 4;
	237	} else if (atom_type == CO64_ATOM) {
cd8d8457	238	printf(" patching co64 atom...\n");
38100e8c MM	239	atom_size = BE_32(&moov_atom[i - 4]);
38100e8c MM	240	if (i + atom_size - 4 > moov_atom_size) {
cd8d8457	241	printf(" bad atom size\n");
c937454d	242	goto error_out;
38100e8c MM	243	}
	244	offset_count = BE_32(&moov_atom[i + 8]);
	245	for (j = 0; j < offset_count; j++) {
cd8d8457	246	current_offset = BE_64(&moov_atom[i + 12 + j * 8]);
38100e8c MM	247	current_offset += moov_atom_size;
	248	moov_atom[i + 12 + j * 8 + 0] = (current_offset >> 56) & 0xFF;
	249	moov_atom[i + 12 + j * 8 + 1] = (current_offset >> 48) & 0xFF;
	250	moov_atom[i + 12 + j * 8 + 2] = (current_offset >> 40) & 0xFF;
	251	moov_atom[i + 12 + j * 8 + 3] = (current_offset >> 32) & 0xFF;
	252	moov_atom[i + 12 + j * 8 + 4] = (current_offset >> 24) & 0xFF;
	253	moov_atom[i + 12 + j * 8 + 5] = (current_offset >> 16) & 0xFF;
	254	moov_atom[i + 12 + j * 8 + 6] = (current_offset >> 8) & 0xFF;
	255	moov_atom[i + 12 + j * 8 + 7] = (current_offset >> 0) & 0xFF;
	256	}
	257	i += atom_size - 4;
	258	}
	259	}
	260
	261	/* re-open the input file and open the output file */
	262	infile = fopen(argv[1], "rb");
	263	if (!infile) {
	264	perror(argv[1]);
c937454d	265	goto error_out;
38100e8c	266	}
fd7789db BC	267
	268	if (start_offset > 0) { /* seek after ftyp atom */
	269	fseeko(infile, start_offset, SEEK_SET);
	270	last_offset -= start_offset;
	271	}
60a9cc58	272
38100e8c MM	273	outfile = fopen(argv[2], "wb");
	274	if (!outfile) {
	275	perror(argv[2]);
c937454d	276	goto error_out;
38100e8c MM	277	}
38100e8c MM	278
60a9cc58 BC	279	/* dump the same ftyp atom */
60a9cc58 BC	280	if (ftyp_atom_size > 0) {
cd8d8457	281	printf(" writing ftyp atom...\n");
60a9cc58 BC	282	if (fwrite(ftyp_atom, ftyp_atom_size, 1, outfile) != 1) {
	283	perror(argv[2]);
	284	goto error_out;
	285	}
	286	}
	287
38100e8c	288	/* dump the new moov atom */
cd8d8457	289	printf(" writing moov atom...\n");
38100e8c MM	290	if (fwrite(moov_atom, moov_atom_size, 1, outfile) != 1) {
	291	perror(argv[2]);
	292	goto error_out;
	293	}
	294
	295	/* copy the remainder of the infile, from offset 0 -> last_offset - 1 */
cd8d8457	296	printf(" copying rest of file...\n");
38100e8c MM	297	while (last_offset) {
	298	if (last_offset > COPY_BUFFER_SIZE)
	299	bytes_to_copy = COPY_BUFFER_SIZE;
	300	else
	301	bytes_to_copy = last_offset;
	302
	303	if (fread(copy_buffer, bytes_to_copy, 1, infile) != 1) {
	304	perror(argv[1]);
	305	goto error_out;
	306	}
	307	if (fwrite(copy_buffer, bytes_to_copy, 1, outfile) != 1) {
	308	perror(argv[2]);
	309	goto error_out;
	310	}
38100e8c MM	311	last_offset -= bytes_to_copy;
	312	}
	313
	314	fclose(infile);
	315	fclose(outfile);
	316	free(moov_atom);
331cb6c3	317	free(ftyp_atom);
38100e8c MM	318
	319	return 0;
	320
	321	error_out:
c937454d	322	if (infile)
e3d7269f	323	fclose(infile);
c937454d	324	if (outfile)
e3d7269f	325	fclose(outfile);
38100e8c	326	free(moov_atom);
331cb6c3	327	free(ftyp_atom);
38100e8c MM	328	return 1;
38100e8c MM	329	}