Stephan Assmus wrote:
On 2009-09-08 at 13:53:39 [+0200], Michael Georgoulopoulos
<[email protected]> wrote:
This seems like the way to do it. Thanks!
I may not fully understand the method yet though, let me tell you what I
understood so far:
First I have to create a new ByteIOContext struct (ie a new struct for
every new file stream I want to load), which is going to represent my
open stream for the duration of the playback. Then call init_put_byte()
to fill my ByteIOContext with my I/O routines. Finally call
av_open_input_stream() instead of av_open_input_file(), and pass it my
ByteIOContext. Then everything is the same.
The thing that I'm unsure of is when and how is my custom stream actually
opened. The ByteIOContext struct does not contain any function pointers
to stream open/close functions, so where do I do that?
You do that yourself, before and after using avformat. You pass an opaque
handle to the init_put_byte() routine, so that you can keep track of or
reference the object that you opened in the hook functions.
Best regards,
-Stephan
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Thanks for your answers. But what about the "buffer" and "buffer_size"
parameters to init_put_byte? I assume write_flag indicates the
capability of writing to my custom stream?
Also what is the "offset" parameter to the seek function pointer? Does
it take the standard C stdio values (SEEK_CUR, SEEK_SET, SEEK_END)? Or
do I need to implement different values (or something more generic like
a real offset from the beginning of the stream)?
Thanks again
Michael
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