int (*handler)(m4af_ctx_t *ctx, uint32_t name, uint64_t size);
} m4af_box_parser_t;
+static
+int m4af_write_null_cb(void *cookie, const void *data, uint32_t size)
+{
+ int64_t *pos = cookie;
+ *pos += size;
+ return 0;
+}
+static
+int m4af_seek_null_cb(void *cookie, int64_t off, int whence)
+{
+ int64_t *pos = cookie;
+ *pos = off; /* XXX: we use only SEEK_SET */
+ return 0;
+}
+static
+int64_t m4af_tell_null_cb(void *cookie)
+{
+ return *((int64_t*)cookie);
+}
+
+static m4af_io_callbacks_t m4af_null_io_callbacks = {
+ 0, m4af_write_null_cb, m4af_seek_null_cb, m4af_tell_null_cb
+};
+
static
int64_t m4af_timestamp(void)
{
return (int64_t)(time(0)) + (((1970 - 1904) * 365) + 17) * 24 * 60 * 60;
}
+
/*
* http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
*/
m4af_track_t *track = &ctx->track[track_idx];
uint32_t i;
m4af_chunk_entry_t *index = track->chunk_table;
- int is_co64 = (ctx->mdat_pos + ctx->mdat_size > UINT32_MAX);
+ int is_co64 = index[track->num_chunks - 1].offset > 0xffffffff;
int64_t pos = m4af_tell(ctx);
m4af_write32(ctx, 0); /* size */
/* reserved[0] */
m4af_write(ctx, !strcmp(type, "mdir") ? "appl" : "\0\0\0\0", 4);
/* reserved[1], reserved[2], name */
- m4af_write(ctx, reserved_and_name, (pos & 1) ? 9 : 10);
+ m4af_write(ctx, reserved_and_name, 9);
m4af_update_box_size(ctx, pos);
}
m4af_set_pos(ctx, ctx->mdat_pos + ctx->mdat_size);
}
+static
+uint64_t m4af_patch_moov(m4af_ctx_t *ctx, uint32_t moov_size, uint32_t offset)
+{
+ int64_t pos = 0;
+ uint32_t moov_size2;
+ int i, j;
+ m4af_io_callbacks_t io_reserve = ctx->io;
+ void *io_cookie_reserve = ctx->io_cookie;
+
+ for (i = 0; i < ctx->num_tracks; ++i)
+ for (j = 0; j < ctx->track[i].num_chunks; ++j)
+ ctx->track[i].chunk_table[j].offset += offset;
+
+ ctx->io = m4af_null_io_callbacks;
+ ctx->io_cookie = &pos;
+ moov_size2 = m4af_write_moov_box(ctx);
+
+ if (moov_size2 != moov_size) {
+ /* stco -> co64 switching */
+ for (i = 0; i < ctx->num_tracks; ++i)
+ for (j = 0; j < ctx->track[i].num_chunks; ++j)
+ ctx->track[i].chunk_table[j].offset += moov_size2 - moov_size;
+ moov_size2 = m4af_write_moov_box(ctx);
+ }
+ ctx->io = io_reserve;
+ ctx->io_cookie = io_cookie_reserve;
+ return moov_size2;
+}
+
static
void m4af_shift_mdat_pos(m4af_ctx_t *ctx, uint32_t offset)
{
unsigned i, j;
int64_t begin, end;
- char buf[8192];
+ char *buf;
+
+ buf = malloc(1024*1024*2);
end = ctx->mdat_pos + ctx->mdat_size;
- for (; (begin = m4af_max(ctx->mdat_pos, end - 8192)) < end; end = begin) {
+ for (; (begin = m4af_max(ctx->mdat_pos, end - 1024*1024*2)) < end;
+ end = begin) {
m4af_set_pos(ctx, begin);
ctx->io.read(ctx->io_cookie, buf, end - begin);
m4af_set_pos(ctx, begin + offset);
m4af_write(ctx, buf, end - begin);
}
- for (i = 0; i < ctx->num_tracks; ++i)
- for (j = 0; j < ctx->track[i].num_chunks; ++j)
- ctx->track[i].chunk_table[j].offset += offset;
ctx->mdat_pos += offset;
m4af_set_pos(ctx, ctx->mdat_pos - 16);
m4af_write_free_box(ctx, 0);
m4af_write(ctx, "\0\0\0\0mdat", 8);
m4af_finalize_mdat(ctx);
+
+ free(buf);
}
int m4af_finalize(m4af_ctx_t *ctx, int optimize)
moov_size = m4af_write_moov_box(ctx);
if (optimize) {
int64_t pos;
- m4af_shift_mdat_pos(ctx, moov_size + 1024);
+ uint32_t moov_size2 = m4af_patch_moov(ctx, moov_size, moov_size + 1024);
+ m4af_shift_mdat_pos(ctx, moov_size2 + 1024);
m4af_set_pos(ctx, 32);
m4af_write_moov_box(ctx);
pos = m4af_tell(ctx);