mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-12-26 20:15:39 +00:00
53cafa9f3d
This commit adds support for go/cgo tgs conversion when building with the -tags `cgo` The default binaries are still "pure" go and uses the old way of converting. * Move lottie_convert.py conversion code to its own file * Add optional libtgsconverter * Update vendor * Apply suggestions from code review * Update bridge/helper/libtgsconverter.go Co-authored-by: Wim <wim@42.be>
687 lines
27 KiB
C
687 lines
27 KiB
C
// Copyright 2011 Google Inc. All Rights Reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the COPYING file in the root of the source
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// tree. An additional intellectual property rights grant can be found
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// in the file PATENTS. All contributing project authors may
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// be found in the AUTHORS file in the root of the source tree.
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// -----------------------------------------------------------------------------
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//
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// Speed-critical functions.
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//
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// Author: Skal (pascal.massimino@gmail.com)
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#ifndef WEBP_DSP_DSP_H_
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#define WEBP_DSP_DSP_H_
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "webp_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define BPS 32 // this is the common stride for enc/dec
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//------------------------------------------------------------------------------
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// CPU detection
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#if defined(__GNUC__)
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# define LOCAL_GCC_VERSION ((__GNUC__ << 8) | __GNUC_MINOR__)
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# define LOCAL_GCC_PREREQ(maj, min) \
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(LOCAL_GCC_VERSION >= (((maj) << 8) | (min)))
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#else
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# define LOCAL_GCC_VERSION 0
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# define LOCAL_GCC_PREREQ(maj, min) 0
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#endif
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#if defined(__clang__)
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# define LOCAL_CLANG_VERSION ((__clang_major__ << 8) | __clang_minor__)
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# define LOCAL_CLANG_PREREQ(maj, min) \
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(LOCAL_CLANG_VERSION >= (((maj) << 8) | (min)))
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#else
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# define LOCAL_CLANG_VERSION 0
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# define LOCAL_CLANG_PREREQ(maj, min) 0
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#endif
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#ifndef __has_builtin
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# define __has_builtin(x) 0
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#endif
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#if !defined(HAVE_CONFIG_H)
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#if defined(_MSC_VER) && _MSC_VER > 1310 && \
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(defined(_M_X64) || defined(_M_IX86))
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#define WEBP_MSC_SSE2 // Visual C++ SSE2 targets
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#endif
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#if defined(_MSC_VER) && _MSC_VER >= 1500 && \
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(defined(_M_X64) || defined(_M_IX86))
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#define WEBP_MSC_SSE41 // Visual C++ SSE4.1 targets
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#endif
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#endif
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// WEBP_HAVE_* are used to indicate the presence of the instruction set in dsp
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// files without intrinsics, allowing the corresponding Init() to be called.
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// Files containing intrinsics will need to be built targeting the instruction
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// set so should succeed on one of the earlier tests.
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#if defined(__SSE2__) || defined(WEBP_MSC_SSE2) || defined(WEBP_HAVE_SSE2)
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#define WEBP_USE_SSE2
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#endif
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#if defined(__SSE4_1__) || defined(WEBP_MSC_SSE41) || defined(WEBP_HAVE_SSE41)
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#define WEBP_USE_SSE41
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#endif
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#undef WEBP_MSC_SSE41
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#undef WEBP_MSC_SSE2
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// The intrinsics currently cause compiler errors with arm-nacl-gcc and the
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// inline assembly would need to be modified for use with Native Client.
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#if (defined(__ARM_NEON__) || \
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defined(__aarch64__) || defined(WEBP_HAVE_NEON)) && \
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!defined(__native_client__)
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#define WEBP_USE_NEON
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#endif
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#if !defined(WEBP_USE_NEON) && defined(__ANDROID__) && \
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defined(__ARM_ARCH_7A__) && defined(HAVE_CPU_FEATURES_H)
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#define WEBP_ANDROID_NEON // Android targets that may have NEON
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#define WEBP_USE_NEON
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#endif
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#if defined(_MSC_VER) && _MSC_VER >= 1700 && defined(_M_ARM)
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#define WEBP_USE_NEON
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#define WEBP_USE_INTRINSICS
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#endif
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#if defined(__mips__) && !defined(__mips64) && \
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defined(__mips_isa_rev) && (__mips_isa_rev >= 1) && (__mips_isa_rev < 6)
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#define WEBP_USE_MIPS32
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#if (__mips_isa_rev >= 2)
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#define WEBP_USE_MIPS32_R2
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#if defined(__mips_dspr2) || (defined(__mips_dsp_rev) && __mips_dsp_rev >= 2)
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#define WEBP_USE_MIPS_DSP_R2
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#endif
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#endif
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#endif
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#if defined(__mips_msa) && defined(__mips_isa_rev) && (__mips_isa_rev >= 5)
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#define WEBP_USE_MSA
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#endif
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#ifndef WEBP_DSP_OMIT_C_CODE
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#define WEBP_DSP_OMIT_C_CODE 1
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#endif
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#if (defined(__aarch64__) || defined(__ARM_NEON__)) && WEBP_DSP_OMIT_C_CODE
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#define WEBP_NEON_OMIT_C_CODE 1
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#else
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#define WEBP_NEON_OMIT_C_CODE 0
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#endif
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#if !(LOCAL_CLANG_PREREQ(3,8) || LOCAL_GCC_PREREQ(4,8) || defined(__aarch64__))
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#define WEBP_NEON_WORK_AROUND_GCC 1
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#else
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#define WEBP_NEON_WORK_AROUND_GCC 0
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#endif
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// This macro prevents thread_sanitizer from reporting known concurrent writes.
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#define WEBP_TSAN_IGNORE_FUNCTION
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#if defined(__has_feature)
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#if __has_feature(thread_sanitizer)
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#undef WEBP_TSAN_IGNORE_FUNCTION
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#define WEBP_TSAN_IGNORE_FUNCTION __attribute__((no_sanitize_thread))
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#endif
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#endif
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#if defined(WEBP_USE_THREAD) && !defined(_WIN32)
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#include <pthread.h> // NOLINT
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#define WEBP_DSP_INIT(func) do { \
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static volatile VP8CPUInfo func ## _last_cpuinfo_used = \
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(VP8CPUInfo)&func ## _last_cpuinfo_used; \
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static pthread_mutex_t func ## _lock = PTHREAD_MUTEX_INITIALIZER; \
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if (pthread_mutex_lock(&func ## _lock)) break; \
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if (func ## _last_cpuinfo_used != VP8GetCPUInfo) func(); \
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func ## _last_cpuinfo_used = VP8GetCPUInfo; \
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(void)pthread_mutex_unlock(&func ## _lock); \
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} while (0)
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#else // !(defined(WEBP_USE_THREAD) && !defined(_WIN32))
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#define WEBP_DSP_INIT(func) do { \
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static volatile VP8CPUInfo func ## _last_cpuinfo_used = \
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(VP8CPUInfo)&func ## _last_cpuinfo_used; \
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if (func ## _last_cpuinfo_used == VP8GetCPUInfo) break; \
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func(); \
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func ## _last_cpuinfo_used = VP8GetCPUInfo; \
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} while (0)
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#endif // defined(WEBP_USE_THREAD) && !defined(_WIN32)
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// Defines an Init + helper function that control multiple initialization of
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// function pointers / tables.
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/* Usage:
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WEBP_DSP_INIT_FUNC(InitFunc) {
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...function body
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}
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*/
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#define WEBP_DSP_INIT_FUNC(name) \
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static WEBP_TSAN_IGNORE_FUNCTION void name ## _body(void); \
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WEBP_TSAN_IGNORE_FUNCTION void name(void) { \
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WEBP_DSP_INIT(name ## _body); \
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} \
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static WEBP_TSAN_IGNORE_FUNCTION void name ## _body(void)
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#define WEBP_UBSAN_IGNORE_UNDEF
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#define WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW
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#if defined(__clang__) && defined(__has_attribute)
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#if __has_attribute(no_sanitize)
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// This macro prevents the undefined behavior sanitizer from reporting
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// failures. This is only meant to silence unaligned loads on platforms that
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// are known to support them.
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#undef WEBP_UBSAN_IGNORE_UNDEF
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#define WEBP_UBSAN_IGNORE_UNDEF \
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__attribute__((no_sanitize("undefined")))
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// This macro prevents the undefined behavior sanitizer from reporting
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// failures related to unsigned integer overflows. This is only meant to
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// silence cases where this well defined behavior is expected.
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#undef WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW
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#define WEBP_UBSAN_IGNORE_UNSIGNED_OVERFLOW \
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__attribute__((no_sanitize("unsigned-integer-overflow")))
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#endif
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#endif
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// If 'ptr' is NULL, returns NULL. Otherwise returns 'ptr + off'.
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// Prevents undefined behavior sanitizer nullptr-with-nonzero-offset warning.
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#if !defined(WEBP_OFFSET_PTR)
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#define WEBP_OFFSET_PTR(ptr, off) (((ptr) == NULL) ? NULL : ((ptr) + (off)))
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#endif
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// Regularize the definition of WEBP_SWAP_16BIT_CSP (backward compatibility)
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#if !defined(WEBP_SWAP_16BIT_CSP)
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#define WEBP_SWAP_16BIT_CSP 0
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#endif
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// some endian fix (e.g.: mips-gcc doesn't define __BIG_ENDIAN__)
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#if !defined(WORDS_BIGENDIAN) && \
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(defined(__BIG_ENDIAN__) || defined(_M_PPC) || \
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(defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)))
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#define WORDS_BIGENDIAN
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#endif
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typedef enum {
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kSSE2,
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kSSE3,
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kSlowSSSE3, // special feature for slow SSSE3 architectures
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kSSE4_1,
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kAVX,
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kAVX2,
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kNEON,
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kMIPS32,
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kMIPSdspR2,
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kMSA
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} CPUFeature;
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// returns true if the CPU supports the feature.
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typedef int (*VP8CPUInfo)(CPUFeature feature);
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WEBP_EXTERN VP8CPUInfo VP8GetCPUInfo;
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//------------------------------------------------------------------------------
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// Init stub generator
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// Defines an init function stub to ensure each module exposes a symbol,
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// avoiding a compiler warning.
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#define WEBP_DSP_INIT_STUB(func) \
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extern void func(void); \
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void func(void) {}
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//------------------------------------------------------------------------------
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// Encoding
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// Transforms
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// VP8Idct: Does one of two inverse transforms. If do_two is set, the transforms
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// will be done for (ref, in, dst) and (ref + 4, in + 16, dst + 4).
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typedef void (*VP8Idct)(const uint8_t* ref, const int16_t* in, uint8_t* dst,
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int do_two);
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typedef void (*VP8Fdct)(const uint8_t* src, const uint8_t* ref, int16_t* out);
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typedef void (*VP8WHT)(const int16_t* in, int16_t* out);
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extern VP8Idct VP8ITransform;
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extern VP8Fdct VP8FTransform;
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extern VP8Fdct VP8FTransform2; // performs two transforms at a time
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extern VP8WHT VP8FTransformWHT;
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// Predictions
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// *dst is the destination block. *top and *left can be NULL.
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typedef void (*VP8IntraPreds)(uint8_t* dst, const uint8_t* left,
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const uint8_t* top);
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typedef void (*VP8Intra4Preds)(uint8_t* dst, const uint8_t* top);
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extern VP8Intra4Preds VP8EncPredLuma4;
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extern VP8IntraPreds VP8EncPredLuma16;
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extern VP8IntraPreds VP8EncPredChroma8;
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typedef int (*VP8Metric)(const uint8_t* pix, const uint8_t* ref);
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extern VP8Metric VP8SSE16x16, VP8SSE16x8, VP8SSE8x8, VP8SSE4x4;
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typedef int (*VP8WMetric)(const uint8_t* pix, const uint8_t* ref,
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const uint16_t* const weights);
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// The weights for VP8TDisto4x4 and VP8TDisto16x16 contain a row-major
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// 4 by 4 symmetric matrix.
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extern VP8WMetric VP8TDisto4x4, VP8TDisto16x16;
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// Compute the average (DC) of four 4x4 blocks.
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// Each sub-4x4 block #i sum is stored in dc[i].
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typedef void (*VP8MeanMetric)(const uint8_t* ref, uint32_t dc[4]);
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extern VP8MeanMetric VP8Mean16x4;
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typedef void (*VP8BlockCopy)(const uint8_t* src, uint8_t* dst);
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extern VP8BlockCopy VP8Copy4x4;
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extern VP8BlockCopy VP8Copy16x8;
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// Quantization
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struct VP8Matrix; // forward declaration
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typedef int (*VP8QuantizeBlock)(int16_t in[16], int16_t out[16],
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const struct VP8Matrix* const mtx);
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// Same as VP8QuantizeBlock, but quantizes two consecutive blocks.
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typedef int (*VP8Quantize2Blocks)(int16_t in[32], int16_t out[32],
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const struct VP8Matrix* const mtx);
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extern VP8QuantizeBlock VP8EncQuantizeBlock;
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extern VP8Quantize2Blocks VP8EncQuantize2Blocks;
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// specific to 2nd transform:
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typedef int (*VP8QuantizeBlockWHT)(int16_t in[16], int16_t out[16],
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const struct VP8Matrix* const mtx);
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extern VP8QuantizeBlockWHT VP8EncQuantizeBlockWHT;
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extern const int VP8DspScan[16 + 4 + 4];
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// Collect histogram for susceptibility calculation.
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#define MAX_COEFF_THRESH 31 // size of histogram used by CollectHistogram.
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typedef struct {
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// We only need to store max_value and last_non_zero, not the distribution.
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int max_value;
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int last_non_zero;
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} VP8Histogram;
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typedef void (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred,
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int start_block, int end_block,
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VP8Histogram* const histo);
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extern VP8CHisto VP8CollectHistogram;
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// General-purpose util function to help VP8CollectHistogram().
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void VP8SetHistogramData(const int distribution[MAX_COEFF_THRESH + 1],
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VP8Histogram* const histo);
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// must be called before using any of the above
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void VP8EncDspInit(void);
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//------------------------------------------------------------------------------
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// cost functions (encoding)
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extern const uint16_t VP8EntropyCost[256]; // 8bit fixed-point log(p)
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// approximate cost per level:
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extern const uint16_t VP8LevelFixedCosts[2047 /*MAX_LEVEL*/ + 1];
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extern const uint8_t VP8EncBands[16 + 1];
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struct VP8Residual;
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typedef void (*VP8SetResidualCoeffsFunc)(const int16_t* const coeffs,
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struct VP8Residual* const res);
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extern VP8SetResidualCoeffsFunc VP8SetResidualCoeffs;
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// Cost calculation function.
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typedef int (*VP8GetResidualCostFunc)(int ctx0,
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const struct VP8Residual* const res);
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extern VP8GetResidualCostFunc VP8GetResidualCost;
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// must be called before anything using the above
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void VP8EncDspCostInit(void);
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//------------------------------------------------------------------------------
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// SSIM / PSNR utils
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// struct for accumulating statistical moments
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typedef struct {
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uint32_t w; // sum(w_i) : sum of weights
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uint32_t xm, ym; // sum(w_i * x_i), sum(w_i * y_i)
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uint32_t xxm, xym, yym; // sum(w_i * x_i * x_i), etc.
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} VP8DistoStats;
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// Compute the final SSIM value
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// The non-clipped version assumes stats->w = (2 * VP8_SSIM_KERNEL + 1)^2.
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double VP8SSIMFromStats(const VP8DistoStats* const stats);
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double VP8SSIMFromStatsClipped(const VP8DistoStats* const stats);
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#define VP8_SSIM_KERNEL 3 // total size of the kernel: 2 * VP8_SSIM_KERNEL + 1
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typedef double (*VP8SSIMGetClippedFunc)(const uint8_t* src1, int stride1,
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const uint8_t* src2, int stride2,
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int xo, int yo, // center position
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int W, int H); // plane dimension
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#if !defined(WEBP_REDUCE_SIZE)
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// This version is called with the guarantee that you can load 8 bytes and
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// 8 rows at offset src1 and src2
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typedef double (*VP8SSIMGetFunc)(const uint8_t* src1, int stride1,
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const uint8_t* src2, int stride2);
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extern VP8SSIMGetFunc VP8SSIMGet; // unclipped / unchecked
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extern VP8SSIMGetClippedFunc VP8SSIMGetClipped; // with clipping
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#endif
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#if !defined(WEBP_DISABLE_STATS)
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typedef uint32_t (*VP8AccumulateSSEFunc)(const uint8_t* src1,
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const uint8_t* src2, int len);
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extern VP8AccumulateSSEFunc VP8AccumulateSSE;
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#endif
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// must be called before using any of the above directly
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void VP8SSIMDspInit(void);
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//------------------------------------------------------------------------------
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// Decoding
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typedef void (*VP8DecIdct)(const int16_t* coeffs, uint8_t* dst);
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// when doing two transforms, coeffs is actually int16_t[2][16].
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typedef void (*VP8DecIdct2)(const int16_t* coeffs, uint8_t* dst, int do_two);
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extern VP8DecIdct2 VP8Transform;
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extern VP8DecIdct VP8TransformAC3;
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extern VP8DecIdct VP8TransformUV;
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extern VP8DecIdct VP8TransformDC;
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extern VP8DecIdct VP8TransformDCUV;
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extern VP8WHT VP8TransformWHT;
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// *dst is the destination block, with stride BPS. Boundary samples are
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// assumed accessible when needed.
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typedef void (*VP8PredFunc)(uint8_t* dst);
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extern VP8PredFunc VP8PredLuma16[/* NUM_B_DC_MODES */];
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extern VP8PredFunc VP8PredChroma8[/* NUM_B_DC_MODES */];
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extern VP8PredFunc VP8PredLuma4[/* NUM_BMODES */];
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// clipping tables (for filtering)
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extern const int8_t* const VP8ksclip1; // clips [-1020, 1020] to [-128, 127]
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extern const int8_t* const VP8ksclip2; // clips [-112, 112] to [-16, 15]
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extern const uint8_t* const VP8kclip1; // clips [-255,511] to [0,255]
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extern const uint8_t* const VP8kabs0; // abs(x) for x in [-255,255]
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// must be called first
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void VP8InitClipTables(void);
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// simple filter (only for luma)
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typedef void (*VP8SimpleFilterFunc)(uint8_t* p, int stride, int thresh);
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extern VP8SimpleFilterFunc VP8SimpleVFilter16;
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extern VP8SimpleFilterFunc VP8SimpleHFilter16;
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extern VP8SimpleFilterFunc VP8SimpleVFilter16i; // filter 3 inner edges
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extern VP8SimpleFilterFunc VP8SimpleHFilter16i;
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// regular filter (on both macroblock edges and inner edges)
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typedef void (*VP8LumaFilterFunc)(uint8_t* luma, int stride,
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int thresh, int ithresh, int hev_t);
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typedef void (*VP8ChromaFilterFunc)(uint8_t* u, uint8_t* v, int stride,
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int thresh, int ithresh, int hev_t);
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// on outer edge
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extern VP8LumaFilterFunc VP8VFilter16;
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extern VP8LumaFilterFunc VP8HFilter16;
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extern VP8ChromaFilterFunc VP8VFilter8;
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extern VP8ChromaFilterFunc VP8HFilter8;
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// on inner edge
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extern VP8LumaFilterFunc VP8VFilter16i; // filtering 3 inner edges altogether
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extern VP8LumaFilterFunc VP8HFilter16i;
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extern VP8ChromaFilterFunc VP8VFilter8i; // filtering u and v altogether
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extern VP8ChromaFilterFunc VP8HFilter8i;
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// Dithering. Combines dithering values (centered around 128) with dst[],
|
|
// according to: dst[] = clip(dst[] + (((dither[]-128) + 8) >> 4)
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|
#define VP8_DITHER_DESCALE 4
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#define VP8_DITHER_DESCALE_ROUNDER (1 << (VP8_DITHER_DESCALE - 1))
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#define VP8_DITHER_AMP_BITS 7
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#define VP8_DITHER_AMP_CENTER (1 << VP8_DITHER_AMP_BITS)
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extern void (*VP8DitherCombine8x8)(const uint8_t* dither, uint8_t* dst,
|
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int dst_stride);
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// must be called before anything using the above
|
|
void VP8DspInit(void);
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|
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|
//------------------------------------------------------------------------------
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|
// WebP I/O
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|
|
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#define FANCY_UPSAMPLING // undefined to remove fancy upsampling support
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|
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// Convert a pair of y/u/v lines together to the output rgb/a colorspace.
|
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// bottom_y can be NULL if only one line of output is needed (at top/bottom).
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|
typedef void (*WebPUpsampleLinePairFunc)(
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const uint8_t* top_y, const uint8_t* bottom_y,
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const uint8_t* top_u, const uint8_t* top_v,
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|
const uint8_t* cur_u, const uint8_t* cur_v,
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|
uint8_t* top_dst, uint8_t* bottom_dst, int len);
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|
|
|
#ifdef FANCY_UPSAMPLING
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|
|
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// Fancy upsampling functions to convert YUV to RGB(A) modes
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extern WebPUpsampleLinePairFunc WebPUpsamplers[/* MODE_LAST */];
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|
|
|
#endif // FANCY_UPSAMPLING
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|
|
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// Per-row point-sampling methods.
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|
typedef void (*WebPSamplerRowFunc)(const uint8_t* y,
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|
const uint8_t* u, const uint8_t* v,
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|
uint8_t* dst, int len);
|
|
// Generic function to apply 'WebPSamplerRowFunc' to the whole plane:
|
|
void WebPSamplerProcessPlane(const uint8_t* y, int y_stride,
|
|
const uint8_t* u, const uint8_t* v, int uv_stride,
|
|
uint8_t* dst, int dst_stride,
|
|
int width, int height, WebPSamplerRowFunc func);
|
|
|
|
// Sampling functions to convert rows of YUV to RGB(A)
|
|
extern WebPSamplerRowFunc WebPSamplers[/* MODE_LAST */];
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|
|
|
// General function for converting two lines of ARGB or RGBA.
|
|
// 'alpha_is_last' should be true if 0xff000000 is stored in memory as
|
|
// as 0x00, 0x00, 0x00, 0xff (little endian).
|
|
WebPUpsampleLinePairFunc WebPGetLinePairConverter(int alpha_is_last);
|
|
|
|
// YUV444->RGB converters
|
|
typedef void (*WebPYUV444Converter)(const uint8_t* y,
|
|
const uint8_t* u, const uint8_t* v,
|
|
uint8_t* dst, int len);
|
|
|
|
extern WebPYUV444Converter WebPYUV444Converters[/* MODE_LAST */];
|
|
|
|
// Must be called before using the WebPUpsamplers[] (and for premultiplied
|
|
// colorspaces like rgbA, rgbA4444, etc)
|
|
void WebPInitUpsamplers(void);
|
|
// Must be called before using WebPSamplers[]
|
|
void WebPInitSamplers(void);
|
|
// Must be called before using WebPYUV444Converters[]
|
|
void WebPInitYUV444Converters(void);
|
|
|
|
//------------------------------------------------------------------------------
|
|
// ARGB -> YUV converters
|
|
|
|
// Convert ARGB samples to luma Y.
|
|
extern void (*WebPConvertARGBToY)(const uint32_t* argb, uint8_t* y, int width);
|
|
// Convert ARGB samples to U/V with downsampling. do_store should be '1' for
|
|
// even lines and '0' for odd ones. 'src_width' is the original width, not
|
|
// the U/V one.
|
|
extern void (*WebPConvertARGBToUV)(const uint32_t* argb, uint8_t* u, uint8_t* v,
|
|
int src_width, int do_store);
|
|
|
|
// Convert a row of accumulated (four-values) of rgba32 toward U/V
|
|
extern void (*WebPConvertRGBA32ToUV)(const uint16_t* rgb,
|
|
uint8_t* u, uint8_t* v, int width);
|
|
|
|
// Convert RGB or BGR to Y
|
|
extern void (*WebPConvertRGB24ToY)(const uint8_t* rgb, uint8_t* y, int width);
|
|
extern void (*WebPConvertBGR24ToY)(const uint8_t* bgr, uint8_t* y, int width);
|
|
|
|
// used for plain-C fallback.
|
|
extern void WebPConvertARGBToUV_C(const uint32_t* argb, uint8_t* u, uint8_t* v,
|
|
int src_width, int do_store);
|
|
extern void WebPConvertRGBA32ToUV_C(const uint16_t* rgb,
|
|
uint8_t* u, uint8_t* v, int width);
|
|
|
|
// utilities for accurate RGB->YUV conversion
|
|
extern uint64_t (*WebPSharpYUVUpdateY)(const uint16_t* src, const uint16_t* ref,
|
|
uint16_t* dst, int len);
|
|
extern void (*WebPSharpYUVUpdateRGB)(const int16_t* src, const int16_t* ref,
|
|
int16_t* dst, int len);
|
|
extern void (*WebPSharpYUVFilterRow)(const int16_t* A, const int16_t* B,
|
|
int len,
|
|
const uint16_t* best_y, uint16_t* out);
|
|
|
|
// Must be called before using the above.
|
|
void WebPInitConvertARGBToYUV(void);
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rescaler
|
|
|
|
struct WebPRescaler;
|
|
|
|
// Import a row of data and save its contribution in the rescaler.
|
|
// 'channel' denotes the channel number to be imported. 'Expand' corresponds to
|
|
// the wrk->x_expand case. Otherwise, 'Shrink' is to be used.
|
|
typedef void (*WebPRescalerImportRowFunc)(struct WebPRescaler* const wrk,
|
|
const uint8_t* src);
|
|
|
|
extern WebPRescalerImportRowFunc WebPRescalerImportRowExpand;
|
|
extern WebPRescalerImportRowFunc WebPRescalerImportRowShrink;
|
|
|
|
// Export one row (starting at x_out position) from rescaler.
|
|
// 'Expand' corresponds to the wrk->y_expand case.
|
|
// Otherwise 'Shrink' is to be used
|
|
typedef void (*WebPRescalerExportRowFunc)(struct WebPRescaler* const wrk);
|
|
extern WebPRescalerExportRowFunc WebPRescalerExportRowExpand;
|
|
extern WebPRescalerExportRowFunc WebPRescalerExportRowShrink;
|
|
|
|
// Plain-C implementation, as fall-back.
|
|
extern void WebPRescalerImportRowExpand_C(struct WebPRescaler* const wrk,
|
|
const uint8_t* src);
|
|
extern void WebPRescalerImportRowShrink_C(struct WebPRescaler* const wrk,
|
|
const uint8_t* src);
|
|
extern void WebPRescalerExportRowExpand_C(struct WebPRescaler* const wrk);
|
|
extern void WebPRescalerExportRowShrink_C(struct WebPRescaler* const wrk);
|
|
|
|
// Main entry calls:
|
|
extern void WebPRescalerImportRow(struct WebPRescaler* const wrk,
|
|
const uint8_t* src);
|
|
// Export one row (starting at x_out position) from rescaler.
|
|
extern void WebPRescalerExportRow(struct WebPRescaler* const wrk);
|
|
|
|
// Must be called first before using the above.
|
|
void WebPRescalerDspInit(void);
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Utilities for processing transparent channel.
|
|
|
|
// Apply alpha pre-multiply on an rgba, bgra or argb plane of size w * h.
|
|
// alpha_first should be 0 for argb, 1 for rgba or bgra (where alpha is last).
|
|
extern void (*WebPApplyAlphaMultiply)(
|
|
uint8_t* rgba, int alpha_first, int w, int h, int stride);
|
|
|
|
// Same, buf specifically for RGBA4444 format
|
|
extern void (*WebPApplyAlphaMultiply4444)(
|
|
uint8_t* rgba4444, int w, int h, int stride);
|
|
|
|
// Dispatch the values from alpha[] plane to the ARGB destination 'dst'.
|
|
// Returns true if alpha[] plane has non-trivial values different from 0xff.
|
|
extern int (*WebPDispatchAlpha)(const uint8_t* alpha, int alpha_stride,
|
|
int width, int height,
|
|
uint8_t* dst, int dst_stride);
|
|
|
|
// Transfer packed 8b alpha[] values to green channel in dst[], zero'ing the
|
|
// A/R/B values. 'dst_stride' is the stride for dst[] in uint32_t units.
|
|
extern void (*WebPDispatchAlphaToGreen)(const uint8_t* alpha, int alpha_stride,
|
|
int width, int height,
|
|
uint32_t* dst, int dst_stride);
|
|
|
|
// Extract the alpha values from 32b values in argb[] and pack them into alpha[]
|
|
// (this is the opposite of WebPDispatchAlpha).
|
|
// Returns true if there's only trivial 0xff alpha values.
|
|
extern int (*WebPExtractAlpha)(const uint8_t* argb, int argb_stride,
|
|
int width, int height,
|
|
uint8_t* alpha, int alpha_stride);
|
|
|
|
// Extract the green values from 32b values in argb[] and pack them into alpha[]
|
|
// (this is the opposite of WebPDispatchAlphaToGreen).
|
|
extern void (*WebPExtractGreen)(const uint32_t* argb, uint8_t* alpha, int size);
|
|
|
|
// Pre-Multiply operation transforms x into x * A / 255 (where x=Y,R,G or B).
|
|
// Un-Multiply operation transforms x into x * 255 / A.
|
|
|
|
// Pre-Multiply or Un-Multiply (if 'inverse' is true) argb values in a row.
|
|
extern void (*WebPMultARGBRow)(uint32_t* const ptr, int width, int inverse);
|
|
|
|
// Same a WebPMultARGBRow(), but for several rows.
|
|
void WebPMultARGBRows(uint8_t* ptr, int stride, int width, int num_rows,
|
|
int inverse);
|
|
|
|
// Same for a row of single values, with side alpha values.
|
|
extern void (*WebPMultRow)(uint8_t* const ptr, const uint8_t* const alpha,
|
|
int width, int inverse);
|
|
|
|
// Same a WebPMultRow(), but for several 'num_rows' rows.
|
|
void WebPMultRows(uint8_t* ptr, int stride,
|
|
const uint8_t* alpha, int alpha_stride,
|
|
int width, int num_rows, int inverse);
|
|
|
|
// Plain-C versions, used as fallback by some implementations.
|
|
void WebPMultRow_C(uint8_t* const ptr, const uint8_t* const alpha,
|
|
int width, int inverse);
|
|
void WebPMultARGBRow_C(uint32_t* const ptr, int width, int inverse);
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
// ARGB packing function: a/r/g/b input is rgba or bgra order.
|
|
extern void (*WebPPackARGB)(const uint8_t* a, const uint8_t* r,
|
|
const uint8_t* g, const uint8_t* b, int len,
|
|
uint32_t* out);
|
|
#endif
|
|
|
|
// RGB packing function. 'step' can be 3 or 4. r/g/b input is rgb or bgr order.
|
|
extern void (*WebPPackRGB)(const uint8_t* r, const uint8_t* g, const uint8_t* b,
|
|
int len, int step, uint32_t* out);
|
|
|
|
// This function returns true if src[i] contains a value different from 0xff.
|
|
extern int (*WebPHasAlpha8b)(const uint8_t* src, int length);
|
|
// This function returns true if src[4*i] contains a value different from 0xff.
|
|
extern int (*WebPHasAlpha32b)(const uint8_t* src, int length);
|
|
// replaces transparent values in src[] by 'color'.
|
|
extern void (*WebPAlphaReplace)(uint32_t* src, int length, uint32_t color);
|
|
|
|
// To be called first before using the above.
|
|
void WebPInitAlphaProcessing(void);
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Filter functions
|
|
|
|
typedef enum { // Filter types.
|
|
WEBP_FILTER_NONE = 0,
|
|
WEBP_FILTER_HORIZONTAL,
|
|
WEBP_FILTER_VERTICAL,
|
|
WEBP_FILTER_GRADIENT,
|
|
WEBP_FILTER_LAST = WEBP_FILTER_GRADIENT + 1, // end marker
|
|
WEBP_FILTER_BEST, // meta-types
|
|
WEBP_FILTER_FAST
|
|
} WEBP_FILTER_TYPE;
|
|
|
|
typedef void (*WebPFilterFunc)(const uint8_t* in, int width, int height,
|
|
int stride, uint8_t* out);
|
|
// In-place un-filtering.
|
|
// Warning! 'prev_line' pointer can be equal to 'cur_line' or 'preds'.
|
|
typedef void (*WebPUnfilterFunc)(const uint8_t* prev_line, const uint8_t* preds,
|
|
uint8_t* cur_line, int width);
|
|
|
|
// Filter the given data using the given predictor.
|
|
// 'in' corresponds to a 2-dimensional pixel array of size (stride * height)
|
|
// in raster order.
|
|
// 'stride' is number of bytes per scan line (with possible padding).
|
|
// 'out' should be pre-allocated.
|
|
extern WebPFilterFunc WebPFilters[WEBP_FILTER_LAST];
|
|
|
|
// In-place reconstruct the original data from the given filtered data.
|
|
// The reconstruction will be done for 'num_rows' rows starting from 'row'
|
|
// (assuming rows upto 'row - 1' are already reconstructed).
|
|
extern WebPUnfilterFunc WebPUnfilters[WEBP_FILTER_LAST];
|
|
|
|
// To be called first before using the above.
|
|
void VP8FiltersInit(void);
|
|
|
|
#ifdef __cplusplus
|
|
} // extern "C"
|
|
#endif
|
|
|
|
#endif // WEBP_DSP_DSP_H_
|