/*
- * qt-faststart.c, v0.1
+ * 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.
* is in front of the data, thus facilitating network streaming.
*
* To compile this program, start from the base directory from which you
- * are building FFmpeg and type:
+ * 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
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
+#include <string.h>
#ifdef __MINGW32__
#define fseeko(x,y,z) fseeko64(x,y,z)
#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')
int main(int argc, char *argv[])
{
- FILE *infile;
- FILE *outfile;
+ 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;
- unsigned char *ftyp_atom = 0;
+ 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;
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]);
- return 1;
+ goto error_out;
}
/* traverse through the atoms in the file to make sure that 'moov' is
atom_size = (uint32_t)BE_32(&atom_bytes[0]);
atom_type = BE_32(&atom_bytes[4]);
- 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 != FTYP_ATOM)) {
- printf ("encountered non-QT top-level atom (is this a Quicktime file?)\n");
- break;
- }
-
/* 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" byte for ftyp atom\n",
atom_size);
- fclose(infile);
- return 1;
+ goto error_out;
}
fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR);
if (fread(ftyp_atom, atom_size, 1, infile) != 1) {
perror(argv[1]);
- free(ftyp_atom);
- fclose(infile);
- return 1;
+ goto error_out;
}
start_offset = ftello(infile);
- continue;
- }
+ } else {
/* 64-bit special case */
if (atom_size == 1) {
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;
}
if (!moov_atom) {
printf ("could not allocate %"PRIu64" byte for moov atom\n",
atom_size);
- fclose(infile);
- return 1;
+ goto error_out;
}
if (fread(moov_atom, atom_size, 1, infile) != 1) {
perror(argv[1]);
- free(moov_atom);
- fclose(infile);
- return 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");
- free(moov_atom);
- fclose(infile);
- return 1;
+ 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_size = BE_32(&moov_atom[i - 4]);
if (i + atom_size - 4 > moov_atom_size) {
printf (" bad atom size\n");
- free(moov_atom);
- return 1;
+ goto error_out;
}
offset_count = BE_32(&moov_atom[i + 8]);
for (j = 0; j < offset_count; j++) {
atom_size = BE_32(&moov_atom[i - 4]);
if (i + atom_size - 4 > moov_atom_size) {
printf (" bad atom size\n");
- free(moov_atom);
- return 1;
+ goto error_out;
}
offset_count = BE_32(&moov_atom[i + 8]);
for (j = 0; j < offset_count; j++) {
infile = fopen(argv[1], "rb");
if (!infile) {
perror(argv[1]);
- free(moov_atom);
- return 1;
+ goto error_out;
}
if (start_offset > 0) { /* seek after ftyp atom */
outfile = fopen(argv[2], "wb");
if (!outfile) {
perror(argv[2]);
- fclose(outfile);
- free(moov_atom);
- return 1;
+ goto error_out;
}
/* dump the same ftyp atom */
fclose(infile);
fclose(outfile);
free(moov_atom);
- if (ftyp_atom_size > 0)
- free(ftyp_atom);
+ free(ftyp_atom);
return 0;
error_out:
- fclose(infile);
- fclose(outfile);
+ if (infile)
+ fclose(infile);
+ if (outfile)
+ fclose(outfile);
free(moov_atom);
- if (ftyp_atom_size > 0)
- free(ftyp_atom);
+ free(ftyp_atom);
return 1;
}
projects / ffmpeg / blobdiff