On Fri, Sep 22, 2017 at 12:36:40AM +0900, Takayuki 'January June' Suwa wrote:
> ---
> doc/protocols.texi | 6 ++++++
> libavformat/async.c | 7 ++++++-
> 2 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/doc/protocols.texi b/doc/protocols.texi
> index a7968ff56e3..f321664d7bf 100644
> --- a/doc/protocols.texi
> +++ b/doc/protocols.texi
> @@ -57,6 +57,12 @@ Asynchronous data filling wrapper for input stream.
>
> Fill data in a background thread, to decouple I/O operation from demux
> thread.
>
> +The accepted options are:
> +@table @option
> +@item asyncbufsize
> +Set asynchronous data buffer size, in bytes. Default value is 8 MiB.
> +@end table
> +
> @example
> async:@var{URL}
> async:http://host/resource
> diff --git a/libavformat/async.c b/libavformat/async.c
> index 54dbd2312a2..f8ac12c7aa0 100644
> --- a/libavformat/async.c
> +++ b/libavformat/async.c
> @@ -78,6 +78,8 @@ typedef struct Context {
>
> int abort_request;
> AVIOInterruptCB interrupt_callback;
> +
> + int asyncbufsize;
> } Context;
>
> static int ring_init(RingBuffer *ring, unsigned int capacity, int
> read_back_capacity)
> @@ -242,10 +244,12 @@ static int async_open(URLContext *h, const char *arg,
> int flags, AVDictionary **
> Context *c = h->priv_data;
> int ret;
> AVIOInterruptCB interrupt_callback = {.callback =
> async_check_interrupt, .opaque = h};
> + int capacity;
>
> av_strstart(arg, "async:", &arg);
>
> - ret = ring_init(&c->ring, BUFFER_CAPACITY, READ_BACK_CAPACITY);
> + capacity = FFMAX(4096, c->asyncbufsize / 2);
> + ret = ring_init(&c->ring, capacity, capacity);READ_BACK_CAPACITY is unused after this patch [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB No snowflake in an avalanche ever feels responsible. -- Voltaire
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