Guangyu Sun e7dd643419 lavf/async: Fix ring_write return value ...

This fixes a regression from commit 36117968ad.

wrapped_url_read() used to be able to return positive number from
ffurl_read(). It relies on the result to check if EOF is reached in
async_buffer_task().

But FIFO callbacks must return 0 on success. This should be handled
in ring_write() instead.

Test case:
  ffmpeg -f lavfi -i testsrc -t 1 test.mp4
  ffmpeg -i async:test.mp4

Signed-off-by: Guangyu Sun <gsun@roblox.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
(cherry picked from commit fc6f7e2a3b)
Signed-off-by: Anton Khirnov <anton@khirnov.net>

2022-10-14 12:24:21 +02:00

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