mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2025-02-14 22:22:59 +02:00
f249c32eff
Up until now, the JPEG-LS encoder allocated a worst-case-sized packet at the beginning of each encode2 call; then it wrote the packet header into its destination buffer and encoded the actual packet data; said data is written into another worst-case-sized buffer, because it needs to be escaped before being written into the packet buffer. Finally, because the packet buffer is worst-case-sized, the generic code copies the actually used part into a fresh buffer. This commit changes this: Allocating the packet and writing the header into it is deferred until the actual data has been encoded and its size is known. This gives a good upper bound for the needed size of the packet buffer (the upper bound might be 1/15 too large) and so one can avoid the implicit intermediate buffer and support user-supplied buffers by using ff_get_encode_buffer(). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>