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get mp4dump working with Emscripten #36

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merged 1 commit into from
Oct 15, 2015
Merged

get mp4dump working with Emscripten #36

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21 changes: 21 additions & 0 deletions Source/C++/Apps/Mp4Dump/Mp4Dump.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,10 @@

#include "Ap4.h"

#ifdef __EMSCRIPTEN__
#include "emscripten.h"
#endif

/*----------------------------------------------------------------------
| constants
+---------------------------------------------------------------------*/
Expand Down Expand Up @@ -288,8 +292,25 @@ main(int argc, char** argv)
return 1;
}
} else {
#ifdef __EMSCRIPTEN__
// Emscripten has to "mount" the filesystem to a virtual directory.
EM_ASM(FS.mkdir('/working'));
EM_ASM(FS.mount(NODEFS, { root: '.' }, '/working'));
const char* const mount_name = "/working/%s";
const int filename_size = snprintf(NULL, 0, mount_name, arg);
char* mounted_filename = (char*) malloc(filename_size + 1);
sprintf(mounted_filename, mount_name, arg);
filename = mounted_filename;
#else
filename = arg;
#endif
AP4_Result result = AP4_FileByteStream::Create(filename, AP4_FileByteStream::STREAM_MODE_READ, input);

#ifdef __EMSCRIPTEN__
free(mounted_filename);
mounted_filename = NULL;
#endif

if (AP4_FAILED(result)) {
fprintf(stderr, "ERROR: cannot open input (%d)\n", result);
return 1;
Expand Down