From 37ad5c2a7da4c4342eb5dce09869623778cdedd4 Mon Sep 17 00:00:00 2001 From: Florian Pritz Date: Sat, 28 Feb 2009 19:19:11 +0100 Subject: added qt-faststart --- qt-faststart | Bin 0 -> 13384 bytes qt-faststart.c | 315 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 315 insertions(+) create mode 100755 qt-faststart create mode 100644 qt-faststart.c diff --git a/qt-faststart b/qt-faststart new file mode 100755 index 0000000..40e1852 Binary files /dev/null and b/qt-faststart differ diff --git a/qt-faststart.c b/qt-faststart.c new file mode 100644 index 0000000..0ea9660 --- /dev/null +++ b/qt-faststart.c @@ -0,0 +1,315 @@ +/* + * qt-faststart.c, v0.1 + * 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 + * + * 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 +#include +#include + +#ifdef __MINGW32__ +#define fseeko(x,y,z) fseeko64(x,y,z) +#define ftello(x) ftello64(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 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; + FILE *outfile; + unsigned char atom_bytes[ATOM_PREAMBLE_SIZE]; + uint32_t atom_type = 0; + uint64_t atom_size = 0; + uint64_t last_offset; + unsigned char *moov_atom; + unsigned char *ftyp_atom = 0; + 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 \n"); + return 0; + } + + infile = fopen(argv[1], "rb"); + if (!infile) { + perror(argv[1]); + return 1; + } + + /* 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]); + + 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; + ftyp_atom = malloc(ftyp_atom_size); + if (!ftyp_atom) { + printf ("could not allocate 0x%llX byte for ftyp atom\n", + atom_size); + fclose(infile); + return 1; + } + 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; + } + start_offset = ftello(infile); + continue; + } + + /* 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); + } + } + + if (atom_type != MOOV_ATOM) { + printf ("last atom in file was not a moov atom\n"); + 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 0x%llX byte for moov atom\n", + atom_size); + fclose(infile); + return 1; + } + if (fread(moov_atom, atom_size, 1, infile) != 1) { + perror(argv[1]); + free(moov_atom); + fclose(infile); + return 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"); + free(moov_atom); + fclose(infile); + return 1; + } + + /* close; will be re-opened later */ + fclose(infile); + + /* 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"); + free(moov_atom); + return 1; + } + 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"); + free(moov_atom); + return 1; + } + 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]); + free(moov_atom); + return 1; + } + + 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]); + fclose(outfile); + free(moov_atom); + return 1; + } + + /* 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); + if (ftyp_atom_size > 0) + free(ftyp_atom); + + return 0; + +error_out: + fclose(infile); + fclose(outfile); + free(moov_atom); + if (ftyp_atom_size > 0) + free(ftyp_atom); + return 1; +} -- cgit v1.2.3-24-g4f1b