diff options
Diffstat (limited to 'src/gallium/auxiliary/util/u_video.h')
| -rw-r--r-- | src/gallium/auxiliary/util/u_video.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_video.h b/src/gallium/auxiliary/util/u_video.h index 45b2d6e768e..b4743d13fbf 100644 --- a/src/gallium/auxiliary/util/u_video.h +++ b/src/gallium/auxiliary/util/u_video.h @@ -38,6 +38,7 @@ extern "C" { /* u_reduce_video_profile() needs these */ #include "pipe/p_compiler.h" #include "util/u_debug.h" +#include "util/u_math.h" static INLINE enum pipe_video_format u_reduce_video_profile(enum pipe_video_profile profile) @@ -146,6 +147,41 @@ u_copy_swap422_packed(void *const *destination_data, } } +static INLINE uint32_t +u_get_h264_level(uint32_t width, uint32_t height, uint32_t *max_reference) +{ + uint32_t max_dpb_mbs; + + width = align(width, 16); + height = align(height, 16); + + /* Max references will be used for caculation of number of DPB buffers + in the UVD driver, limitation of max references is 16. Some client + like mpv application for VA-API, it requires references more than that, + so we have to set max of references to 16 here. */ + *max_reference = MIN2(*max_reference, 16); + max_dpb_mbs = (width / 16) * (height / 16) * *max_reference; + + /* The calculation is based on "Decoded picture buffering" section + from http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC */ + if (max_dpb_mbs <= 8100) + return 30; + else if (max_dpb_mbs <= 18000) + return 31; + else if (max_dpb_mbs <= 20480) + return 32; + else if (max_dpb_mbs <= 32768) + return 41; + else if (max_dpb_mbs <= 34816) + return 42; + else if (max_dpb_mbs <= 110400) + return 50; + else if (max_dpb_mbs <= 184320) + return 51; + else + return 52; +} + #ifdef __cplusplus } #endif |