diff options
Diffstat (limited to 'drivers/webp/enc/config.c')
| -rw-r--r-- | drivers/webp/enc/config.c | 69 |
1 files changed, 55 insertions, 14 deletions
diff --git a/drivers/webp/enc/config.c b/drivers/webp/enc/config.c index 4136f6c227..8fd2276cb5 100644 --- a/drivers/webp/enc/config.c +++ b/drivers/webp/enc/config.c @@ -1,19 +1,17 @@ // Copyright 2011 Google Inc. All Rights Reserved. // -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ +// Use of this source code is governed by a BSD-style license +// that can be found in the COPYING 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. // ----------------------------------------------------------------------------- // // Coding tools configuration // // Author: Skal (pascal.massimino@gmail.com) -#include "../encode.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif +#include "webp/encode.h" //------------------------------------------------------------------------------ // WebPConfig @@ -31,9 +29,9 @@ int WebPConfigInitInternal(WebPConfig* config, config->target_PSNR = 0.; config->method = 4; config->sns_strength = 50; - config->filter_strength = 20; // default: light filtering + config->filter_strength = 60; // mid-filtering config->filter_sharpness = 0; - config->filter_type = 0; // default: simple + config->filter_type = 1; // default: strong (so U/V is filtered too) config->partitions = 0; config->segments = 4; config->pass = 1; @@ -45,7 +43,15 @@ int WebPConfigInitInternal(WebPConfig* config, config->alpha_filtering = 1; config->alpha_quality = 100; config->lossless = 0; + config->exact = 0; config->image_hint = WEBP_HINT_DEFAULT; + config->emulate_jpeg_size = 0; + config->thread_level = 0; + config->low_memory = 0; + config->near_lossless = 100; +#ifdef WEBP_EXPERIMENTAL_FEATURES + config->delta_palettization = 0; +#endif // WEBP_EXPERIMENTAL_FEATURES // TODO(skal): tune. switch (preset) { @@ -53,11 +59,13 @@ int WebPConfigInitInternal(WebPConfig* config, config->sns_strength = 80; config->filter_sharpness = 4; config->filter_strength = 35; + config->preprocessing &= ~2; // no dithering break; case WEBP_PRESET_PHOTO: config->sns_strength = 80; config->filter_sharpness = 3; config->filter_strength = 30; + config->preprocessing |= 2; break; case WEBP_PRESET_DRAWING: config->sns_strength = 25; @@ -67,10 +75,12 @@ int WebPConfigInitInternal(WebPConfig* config, case WEBP_PRESET_ICON: config->sns_strength = 0; config->filter_strength = 0; // disable filtering to retain sharpness + config->preprocessing &= ~2; // no dithering break; case WEBP_PRESET_TEXT: config->sns_strength = 0; config->filter_strength = 0; // disable filtering to retain sharpness + config->preprocessing &= ~2; // no dithering config->segments = 2; break; case WEBP_PRESET_DEFAULT: @@ -106,7 +116,7 @@ int WebPValidateConfig(const WebPConfig* config) { return 0; if (config->show_compressed < 0 || config->show_compressed > 1) return 0; - if (config->preprocessing < 0 || config->preprocessing > 1) + if (config->preprocessing < 0 || config->preprocessing > 7) return 0; if (config->partitions < 0 || config->partitions > 3) return 0; @@ -120,13 +130,44 @@ int WebPValidateConfig(const WebPConfig* config) { return 0; if (config->lossless < 0 || config->lossless > 1) return 0; + if (config->near_lossless < 0 || config->near_lossless > 100) + return 0; if (config->image_hint >= WEBP_HINT_LAST) return 0; + if (config->emulate_jpeg_size < 0 || config->emulate_jpeg_size > 1) + return 0; + if (config->thread_level < 0 || config->thread_level > 1) + return 0; + if (config->low_memory < 0 || config->low_memory > 1) + return 0; + if (config->exact < 0 || config->exact > 1) + return 0; +#ifdef WEBP_EXPERIMENTAL_FEATURES + if (config->delta_palettization < 0 || config->delta_palettization > 1) + return 0; +#endif // WEBP_EXPERIMENTAL_FEATURES return 1; } //------------------------------------------------------------------------------ -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif +#define MAX_LEVEL 9 + +// Mapping between -z level and -m / -q parameter settings. +static const struct { + uint8_t method_; + uint8_t quality_; +} kLosslessPresets[MAX_LEVEL + 1] = { + { 0, 0 }, { 1, 20 }, { 2, 25 }, { 3, 30 }, { 3, 50 }, + { 4, 50 }, { 4, 75 }, { 4, 90 }, { 5, 90 }, { 6, 100 } +}; + +int WebPConfigLosslessPreset(WebPConfig* config, int level) { + if (config == NULL || level < 0 || level > MAX_LEVEL) return 0; + config->lossless = 1; + config->method = kLosslessPresets[level].method_; + config->quality = kLosslessPresets[level].quality_; + return 1; +} + +//------------------------------------------------------------------------------ |