X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=tools%2Fqt-faststart.c;h=f33d6fa80c0c328e699028131314e632b4b0ff52;hb=71f3eb4536d93b3086a43c18b623cfe93322fc77;hp=e1bcebca93819d7035922137b54adfbc90b6e24d;hpb=e3d7269fc825443d2daed50c7b3382b4ffbd2bf1;p=ffmpeg diff --git a/tools/qt-faststart.c b/tools/qt-faststart.c index e1bcebca938..f33d6fa80c0 100644 --- a/tools/qt-faststart.c +++ b/tools/qt-faststart.c @@ -8,7 +8,7 @@ * 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 @@ -27,31 +27,37 @@ #include #include #include +#include #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 */ @@ -70,20 +76,20 @@ #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; @@ -94,10 +100,15 @@ int main(int argc, char *argv[]) int bytes_to_copy; if (argc != 3) { - printf ("Usage: qt-faststart \n"); + printf("Usage: qt-faststart \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]); @@ -110,7 +121,7 @@ int main(int argc, char *argv[]) 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 */ @@ -119,8 +130,8 @@ int main(int argc, char *argv[]) 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); @@ -130,18 +141,17 @@ int main(int argc, char *argv[]) } 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, @@ -159,14 +169,20 @@ int main(int argc, char *argv[]) (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; @@ -175,12 +191,11 @@ int main(int argc, char *argv[]) /* 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) { @@ -191,7 +206,7 @@ int main(int argc, char *argv[]) /* 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; } @@ -203,15 +218,15 @@ int main(int argc, char *argv[]) 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; @@ -220,15 +235,15 @@ int main(int argc, char *argv[]) } 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; @@ -263,7 +278,7 @@ int main(int argc, char *argv[]) /* 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; @@ -271,14 +286,14 @@ int main(int argc, char *argv[]) } /* 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; @@ -293,7 +308,6 @@ int main(int argc, char *argv[]) perror(argv[2]); goto error_out; } - last_offset -= bytes_to_copy; }