| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /** | ||
| 2 | * Copyright (C) 2025 Niklas Haas | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include "ops_backend.h" | ||
| 22 | |||
| 23 | /** | ||
| 24 | * We want to disable FP contraction because this is a reference backend that | ||
| 25 | * establishes a bit-exact reference result. | ||
| 26 | */ | ||
| 27 | #ifdef __clang__ | ||
| 28 | #pragma STDC FP_CONTRACT OFF | ||
| 29 | #elif AV_GCC_VERSION_AT_LEAST(4, 8) | ||
| 30 | #pragma GCC optimize ("fp-contract=off") | ||
| 31 | #elif defined(_MSC_VER) | ||
| 32 | #pragma fp_contract (off) | ||
| 33 | #endif | ||
| 34 | |||
| 35 | #if AV_GCC_VERSION_AT_LEAST(4, 4) | ||
| 36 | #pragma GCC optimize ("finite-math-only") | ||
| 37 | #endif | ||
| 38 | |||
| 39 | /* Array-based reference implementation */ | ||
| 40 | |||
| 41 | #ifndef SWS_BLOCK_SIZE | ||
| 42 | # define SWS_BLOCK_SIZE 32 | ||
| 43 | #endif | ||
| 44 | |||
| 45 | typedef uint8_t u8block_t[SWS_BLOCK_SIZE]; | ||
| 46 | typedef uint16_t u16block_t[SWS_BLOCK_SIZE]; | ||
| 47 | typedef uint32_t u32block_t[SWS_BLOCK_SIZE]; | ||
| 48 | typedef float f32block_t[SWS_BLOCK_SIZE]; | ||
| 49 | |||
| 50 | #define BIT_DEPTH 8 | ||
| 51 | # include "ops_tmpl_int.c" | ||
| 52 | #undef BIT_DEPTH | ||
| 53 | |||
| 54 | #define BIT_DEPTH 16 | ||
| 55 | # include "ops_tmpl_int.c" | ||
| 56 | #undef BIT_DEPTH | ||
| 57 | |||
| 58 | #define BIT_DEPTH 32 | ||
| 59 | # include "ops_tmpl_int.c" | ||
| 60 | # include "ops_tmpl_float.c" | ||
| 61 | #undef BIT_DEPTH | ||
| 62 | |||
| 63 | static const SwsOpTable *const tables[] = { | ||
| 64 | &bitfn(op_table_int, u8), | ||
| 65 | &bitfn(op_table_int, u16), | ||
| 66 | &bitfn(op_table_int, u32), | ||
| 67 | &bitfn(op_table_float, f32), | ||
| 68 | }; | ||
| 69 | |||
| 70 | 13401 | static int compile(SwsContext *ctx, SwsOpList *ops, SwsCompiledOp *out) | |
| 71 | { | ||
| 72 | int ret; | ||
| 73 | |||
| 74 | 13401 | SwsOpChain *chain = ff_sws_op_chain_alloc(); | |
| 75 |
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13401 | if (!chain) |
| 76 | ✗ | return AVERROR(ENOMEM); | |
| 77 | |||
| 78 |
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13401 | av_assert0(ops->num_ops > 0); |
| 79 | 13401 | const SwsPixelType read_type = ops->ops[0].type; | |
| 80 | |||
| 81 |
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54746 | for (int i = 0; i < ops->num_ops; i++) { |
| 82 | 41345 | ret = ff_sws_op_compile_tables(ctx, tables, FF_ARRAY_ELEMS(tables), | |
| 83 | ops, i, SWS_BLOCK_SIZE, chain); | ||
| 84 |
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41345 | if (ret < 0) { |
| 85 | ✗ | av_log(ctx, AV_LOG_TRACE, "Failed to compile op %d\n", i); | |
| 86 | ✗ | ff_sws_op_chain_free(chain); | |
| 87 | ✗ | return ret; | |
| 88 | } | ||
| 89 | } | ||
| 90 | |||
| 91 | 13401 | *out = (SwsCompiledOp) { | |
| 92 | .slice_align = 1, | ||
| 93 | .block_size = SWS_BLOCK_SIZE, | ||
| 94 | 13401 | .cpu_flags = chain->cpu_flags, | |
| 95 | 13401 | .over_read = chain->over_read, | |
| 96 | 13401 | .over_write = chain->over_write, | |
| 97 | .priv = chain, | ||
| 98 | .free = ff_sws_op_chain_free_cb, | ||
| 99 | }; | ||
| 100 | |||
| 101 |
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13401 | switch (read_type) { |
| 102 | 2857 | case SWS_PIXEL_U8: out->func = process_u8; break; | |
| 103 | 3948 | case SWS_PIXEL_U16: out->func = process_u16; break; | |
| 104 | 3688 | case SWS_PIXEL_U32: out->func = process_u32; break; | |
| 105 | 2908 | case SWS_PIXEL_F32: out->func = process_f32; break; | |
| 106 | ✗ | default: av_unreachable("Invalid pixel type!"); | |
| 107 | } | ||
| 108 | |||
| 109 | 13401 | return 0; | |
| 110 | } | ||
| 111 | |||
| 112 | const SwsOpBackend backend_c = { | ||
| 113 | .name = "c", | ||
| 114 | .compile = compile, | ||
| 115 | .hw_format = AV_PIX_FMT_NONE, | ||
| 116 | }; | ||
| 117 |