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- /*
- * 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 FFmpeg 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;
- }
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