Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Martin Storsjö	9c8bc74c2b	arm: vp9itxfm: Skip empty slices in the first pass of idct_idct 16x16 and 32x32 This work is sponsored by, and copyright, Google. Previously all subpartitions except the eob=1 (DC) case ran with the same runtime: Cortex A7 A8 A9 A53 vp9_inv_dct_dct_16x16_sub16_add_neon: 3188.1 2435.4 2499.0 1969.0 vp9_inv_dct_dct_32x32_sub32_add_neon: 18531.7 16582.3 14207.6 12000.3 By skipping individual 4x16 or 4x32 pixel slices in the first pass, we reduce the runtime of these functions like this: vp9_inv_dct_dct_16x16_sub1_add_neon: 274.6 189.5 211.7 235.8 vp9_inv_dct_dct_16x16_sub2_add_neon: 2064.0 1534.8 1719.4 1248.7 vp9_inv_dct_dct_16x16_sub4_add_neon: 2135.0 1477.2 1736.3 1249.5 vp9_inv_dct_dct_16x16_sub8_add_neon: 2446.7 1828.7 1993.6 1494.7 vp9_inv_dct_dct_16x16_sub12_add_neon: 2832.4 2118.3 2266.5 1735.1 vp9_inv_dct_dct_16x16_sub16_add_neon: 3211.7 2475.3 2523.5 1983.1 vp9_inv_dct_dct_32x32_sub1_add_neon: 756.2 456.7 862.0 553.9 vp9_inv_dct_dct_32x32_sub2_add_neon: 10682.2 8190.4 8539.2 6762.5 vp9_inv_dct_dct_32x32_sub4_add_neon: 10813.5 8014.9 8518.3 6762.8 vp9_inv_dct_dct_32x32_sub8_add_neon: 11859.6 9313.0 9347.4 7514.5 vp9_inv_dct_dct_32x32_sub12_add_neon: 12946.6 10752.4 10192.2 8280.2 vp9_inv_dct_dct_32x32_sub16_add_neon: 14074.6 11946.5 11001.4 9008.6 vp9_inv_dct_dct_32x32_sub20_add_neon: 15269.9 13662.7 11816.1 9762.6 vp9_inv_dct_dct_32x32_sub24_add_neon: 16327.9 14940.1 12626.7 10516.0 vp9_inv_dct_dct_32x32_sub28_add_neon: 17462.7 15776.1 13446.2 11264.7 vp9_inv_dct_dct_32x32_sub32_add_neon: 18575.5 17157.0 14249.3 12015.1 I.e. in general a very minor overhead for the full subpartition case due to the additional loads and cmps, but a significant speedup for the cases when we only need to process a small part of the actual input data. In common VP9 content in a few inspected clips, 70-90% of the non-dc-only 16x16 and 32x32 IDCTs only have nonzero coefficients in the upper left 8x8 or 16x16 subpartitions respectively. Signed-off-by: Martin Storsjö <martin@martin.st>	8 years ago
Martin Storsjö	3c87039a40	arm: vp9itxfm: Only reload the idct coeffs for the iadst_idct combination This avoids reloading them if they haven't been clobbered, if the first pass also was idct. This is similar to what was done in the aarch64 version. Signed-off-by: Martin Storsjö <martin@martin.st>	8 years ago
Martin Storsjö	79566ec8c7	arm: vp9itxfm: Rename a macro parameter to fit better Since the same parameter is used for both input and output, the name inout is more fitting. This matches the naming used below in the dmbutterfly macro. Signed-off-by: Martin Storsjö <martin@martin.st>	8 years ago
Martin Storsjö	721bc37522	arm/aarch64: vp9itxfm: Fix indentation of macro arguments Signed-off-by: Martin Storsjö <martin@martin.st>	8 years ago
Janne Grunau	e5b0fc170f	arm: vp9itxfm: Simplify the stack alignment code This is one instruction less for thumb, and only have got 1/2 arm/thumb specific instructions. Signed-off-by: Martin Storsjö <martin@martin.st>	8 years ago
Martin Storsjö	52d196fb30	arm: vp9itxfm: Simplify txfm string comparisons Signed-off-by: Martin Storsjö <martin@martin.st>	8 years ago
Martin Storsjö	a67ae67083	arm: vp9: Add NEON itxfm routines This work is sponsored by, and copyright, Google. For the transforms up to 8x8, we can fit all the data (including temporaries) in registers and just do a straightforward transform of all the data. For 16x16, we do a transform of 4x16 pixels in 4 slices, using a temporary buffer. For 32x32, we transform 4x32 pixels at a time, in two steps of 4x16 pixels each. Examples of relative speedup compared to the C version, from checkasm: Cortex A7 A8 A9 A53 vp9_inv_adst_adst_4x4_add_neon: 3.39 5.83 4.17 4.01 vp9_inv_adst_adst_8x8_add_neon: 3.79 4.86 4.23 3.98 vp9_inv_adst_adst_16x16_add_neon: 3.33 4.36 4.11 4.16 vp9_inv_dct_dct_4x4_add_neon: 4.06 6.16 4.59 4.46 vp9_inv_dct_dct_8x8_add_neon: 4.61 6.01 4.98 4.86 vp9_inv_dct_dct_16x16_add_neon: 3.35 3.44 3.36 3.79 vp9_inv_dct_dct_32x32_add_neon: 3.89 3.50 3.79 4.42 vp9_inv_wht_wht_4x4_add_neon: 3.22 5.13 3.53 3.77 Thus, the speedup vs C code is around 3-6x. This is mostly marginally faster than the corresponding routines in libvpx on most cores, tested with their 32x32 idct (compared to vpx_idct32x32_1024_add_neon). These numbers are slightly in libvpx's favour since their version doesn't clear the input buffer like ours do (although the effect of that on the total runtime probably is negligible.) Cortex A7 A8 A9 A53 vp9_inv_dct_dct_32x32_add_neon: 18436.8 16874.1 14235.1 11988.9 libvpx vpx_idct32x32_1024_add_neon 20789.0 13344.3 15049.9 13030.5 Only on the Cortex A8, the libvpx function is faster. On the other cores, ours is slightly faster even though ours has got source block clearing integrated. Signed-off-by: Martin Storsjö <martin@martin.st>	8 years ago