diff options
Diffstat (limited to 'thirdparty/libvpx/vpx_dsp/arm/idct16x16_neon.c')
| -rw-r--r-- | thirdparty/libvpx/vpx_dsp/arm/idct16x16_neon.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/thirdparty/libvpx/vpx_dsp/arm/idct16x16_neon.c b/thirdparty/libvpx/vpx_dsp/arm/idct16x16_neon.c new file mode 100644 index 0000000000..352979aa16 --- /dev/null +++ b/thirdparty/libvpx/vpx_dsp/arm/idct16x16_neon.c @@ -0,0 +1,185 @@ +/* + * Copyright (c) 2013 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "vpx_dsp/vpx_dsp_common.h" + +void vpx_idct16x16_256_add_neon_pass1(const int16_t *input, + int16_t *output, + int output_stride); +void vpx_idct16x16_256_add_neon_pass2(const int16_t *src, + int16_t *output, + int16_t *pass1Output, + int16_t skip_adding, + uint8_t *dest, + int dest_stride); +void vpx_idct16x16_10_add_neon_pass1(const int16_t *input, + int16_t *output, + int output_stride); +void vpx_idct16x16_10_add_neon_pass2(const int16_t *src, + int16_t *output, + int16_t *pass1Output, + int16_t skip_adding, + uint8_t *dest, + int dest_stride); + +#if HAVE_NEON_ASM +/* For ARM NEON, d8-d15 are callee-saved registers, and need to be saved. */ +extern void vpx_push_neon(int64_t *store); +extern void vpx_pop_neon(int64_t *store); +#endif // HAVE_NEON_ASM + +void vpx_idct16x16_256_add_neon(const int16_t *input, + uint8_t *dest, int dest_stride) { +#if HAVE_NEON_ASM + int64_t store_reg[8]; +#endif + int16_t pass1_output[16*16] = {0}; + int16_t row_idct_output[16*16] = {0}; + +#if HAVE_NEON_ASM + // save d8-d15 register values. + vpx_push_neon(store_reg); +#endif + + /* Parallel idct on the upper 8 rows */ + // First pass processes even elements 0, 2, 4, 6, 8, 10, 12, 14 and save the + // stage 6 result in pass1_output. + vpx_idct16x16_256_add_neon_pass1(input, pass1_output, 8); + + // Second pass processes odd elements 1, 3, 5, 7, 9, 11, 13, 15 and combines + // with result in pass1(pass1_output) to calculate final result in stage 7 + // which will be saved into row_idct_output. + vpx_idct16x16_256_add_neon_pass2(input+1, + row_idct_output, + pass1_output, + 0, + dest, + dest_stride); + + /* Parallel idct on the lower 8 rows */ + // First pass processes even elements 0, 2, 4, 6, 8, 10, 12, 14 and save the + // stage 6 result in pass1_output. + vpx_idct16x16_256_add_neon_pass1(input+8*16, pass1_output, 8); + + // Second pass processes odd elements 1, 3, 5, 7, 9, 11, 13, 15 and combines + // with result in pass1(pass1_output) to calculate final result in stage 7 + // which will be saved into row_idct_output. + vpx_idct16x16_256_add_neon_pass2(input+8*16+1, + row_idct_output+8, + pass1_output, + 0, + dest, + dest_stride); + + /* Parallel idct on the left 8 columns */ + // First pass processes even elements 0, 2, 4, 6, 8, 10, 12, 14 and save the + // stage 6 result in pass1_output. + vpx_idct16x16_256_add_neon_pass1(row_idct_output, pass1_output, 8); + + // Second pass processes odd elements 1, 3, 5, 7, 9, 11, 13, 15 and combines + // with result in pass1(pass1_output) to calculate final result in stage 7. + // Then add the result to the destination data. + vpx_idct16x16_256_add_neon_pass2(row_idct_output+1, + row_idct_output, + pass1_output, + 1, + dest, + dest_stride); + + /* Parallel idct on the right 8 columns */ + // First pass processes even elements 0, 2, 4, 6, 8, 10, 12, 14 and save the + // stage 6 result in pass1_output. + vpx_idct16x16_256_add_neon_pass1(row_idct_output+8*16, pass1_output, 8); + + // Second pass processes odd elements 1, 3, 5, 7, 9, 11, 13, 15 and combines + // with result in pass1(pass1_output) to calculate final result in stage 7. + // Then add the result to the destination data. + vpx_idct16x16_256_add_neon_pass2(row_idct_output+8*16+1, + row_idct_output+8, + pass1_output, + 1, + dest+8, + dest_stride); + +#if HAVE_NEON_ASM + // restore d8-d15 register values. + vpx_pop_neon(store_reg); +#endif + + return; +} + +void vpx_idct16x16_10_add_neon(const int16_t *input, + uint8_t *dest, int dest_stride) { +#if HAVE_NEON_ASM + int64_t store_reg[8]; +#endif + int16_t pass1_output[16*16] = {0}; + int16_t row_idct_output[16*16] = {0}; + +#if HAVE_NEON_ASM + // save d8-d15 register values. + vpx_push_neon(store_reg); +#endif + + /* Parallel idct on the upper 8 rows */ + // First pass processes even elements 0, 2, 4, 6, 8, 10, 12, 14 and save the + // stage 6 result in pass1_output. + vpx_idct16x16_10_add_neon_pass1(input, pass1_output, 8); + + // Second pass processes odd elements 1, 3, 5, 7, 9, 11, 13, 15 and combines + // with result in pass1(pass1_output) to calculate final result in stage 7 + // which will be saved into row_idct_output. + vpx_idct16x16_10_add_neon_pass2(input+1, + row_idct_output, + pass1_output, + 0, + dest, + dest_stride); + + /* Skip Parallel idct on the lower 8 rows as they are all 0s */ + + /* Parallel idct on the left 8 columns */ + // First pass processes even elements 0, 2, 4, 6, 8, 10, 12, 14 and save the + // stage 6 result in pass1_output. + vpx_idct16x16_256_add_neon_pass1(row_idct_output, pass1_output, 8); + + // Second pass processes odd elements 1, 3, 5, 7, 9, 11, 13, 15 and combines + // with result in pass1(pass1_output) to calculate final result in stage 7. + // Then add the result to the destination data. + vpx_idct16x16_256_add_neon_pass2(row_idct_output+1, + row_idct_output, + pass1_output, + 1, + dest, + dest_stride); + + /* Parallel idct on the right 8 columns */ + // First pass processes even elements 0, 2, 4, 6, 8, 10, 12, 14 and save the + // stage 6 result in pass1_output. + vpx_idct16x16_256_add_neon_pass1(row_idct_output+8*16, pass1_output, 8); + + // Second pass processes odd elements 1, 3, 5, 7, 9, 11, 13, 15 and combines + // with result in pass1(pass1_output) to calculate final result in stage 7. + // Then add the result to the destination data. + vpx_idct16x16_256_add_neon_pass2(row_idct_output+8*16+1, + row_idct_output+8, + pass1_output, + 1, + dest+8, + dest_stride); + +#if HAVE_NEON_ASM + // restore d8-d15 register values. + vpx_pop_neon(store_reg); +#endif + + return; +} |