* 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 ftello(x) ftello64(x)
+#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) | \
+#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 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 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
+#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;
+ 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 = 0;
+ unsigned char *ftyp_atom = NULL;
uint64_t moov_atom_size;
uint64_t ftyp_atom_size = 0;
uint64_t i, j;
int bytes_to_copy;
if (argc != 3) {
- printf ("Usage: qt-faststart <infile.mov> <outfile.mov>\n");
+ 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]);
if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
break;
}
- atom_size = (uint32_t)BE_32(&atom_bytes[0]);
+ atom_size = (uint32_t) BE_32(&atom_bytes[0]);
atom_type = BE_32(&atom_bytes[4]);
/* keep ftyp atom */
free(ftyp_atom);
ftyp_atom = malloc(ftyp_atom_size);
if (!ftyp_atom) {
- printf ("could not allocate %"PRIu64" byte for ftyp atom\n",
- atom_size);
+ printf("could not allocate %"PRIu64" bytes for ftyp atom\n",
+ atom_size);
goto error_out;
}
fseeko(infile, -ATOM_PREAMBLE_SIZE, SEEK_CUR);
}
start_offset = ftello(infile);
} else {
-
- /* 64-bit special case */
- if (atom_size == 1) {
- if (fread(atom_bytes, ATOM_PREAMBLE_SIZE, 1, infile) != 1) {
- break;
+ /* 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);
}
- 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 != PICT_ATOM) &&
(atom_type != UUID_ATOM) &&
(atom_type != FTYP_ATOM)) {
- printf ("encountered non-QT top-level atom (is this a Quicktime file?)\n");
+ 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");
+ 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);
+ last_offset = ftello(infile);
moov_atom_size = atom_size;
- moov_atom = malloc(moov_atom_size);
+ moov_atom = malloc(moov_atom_size);
if (!moov_atom) {
- printf ("could not allocate %"PRIu64" byte for moov atom\n",
- atom_size);
+ printf("could not allocate %"PRIu64" bytes for moov atom\n", atom_size);
goto error_out;
}
if (fread(moov_atom, atom_size, 1, infile) != 1) {
/* 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");
+ printf("this utility does not support compressed moov atoms yet\n");
goto error_out;
}
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");
+ 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");
+ 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 = 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;
}
i += atom_size - 4;
} else if (atom_type == CO64_ATOM) {
- printf (" patching co64 atom...\n");
+ 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");
+ 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 = 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;
/* dump the same ftyp atom */
if (ftyp_atom_size > 0) {
- printf (" writing ftyp atom...\n");
+ 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");
+ 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");
+ printf(" copying rest of file...\n");
while (last_offset) {
if (last_offset > COPY_BUFFER_SIZE)
bytes_to_copy = COPY_BUFFER_SIZE;
perror(argv[2]);
goto error_out;
}
-
last_offset -= bytes_to_copy;
}
projects / ffmpeg / blobdiff