diff options
Diffstat (limited to 'drivers/webpold/enc/config.c')
| -rw-r--r-- | drivers/webpold/enc/config.c | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/webpold/enc/config.c b/drivers/webpold/enc/config.c new file mode 100644 index 0000000000..4136f6c227 --- /dev/null +++ b/drivers/webpold/enc/config.c @@ -0,0 +1,132 @@ +// 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/ +// ----------------------------------------------------------------------------- +// +// Coding tools configuration +// +// Author: Skal (pascal.massimino@gmail.com) + +#include "../encode.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +//------------------------------------------------------------------------------ +// WebPConfig +//------------------------------------------------------------------------------ + +int WebPConfigInitInternal(WebPConfig* config, + WebPPreset preset, float quality, int version) { + if (WEBP_ABI_IS_INCOMPATIBLE(version, WEBP_ENCODER_ABI_VERSION)) { + return 0; // caller/system version mismatch! + } + if (config == NULL) return 0; + + config->quality = quality; + config->target_size = 0; + config->target_PSNR = 0.; + config->method = 4; + config->sns_strength = 50; + config->filter_strength = 20; // default: light filtering + config->filter_sharpness = 0; + config->filter_type = 0; // default: simple + config->partitions = 0; + config->segments = 4; + config->pass = 1; + config->show_compressed = 0; + config->preprocessing = 0; + config->autofilter = 0; + config->partition_limit = 0; + config->alpha_compression = 1; + config->alpha_filtering = 1; + config->alpha_quality = 100; + config->lossless = 0; + config->image_hint = WEBP_HINT_DEFAULT; + + // TODO(skal): tune. + switch (preset) { + case WEBP_PRESET_PICTURE: + config->sns_strength = 80; + config->filter_sharpness = 4; + config->filter_strength = 35; + break; + case WEBP_PRESET_PHOTO: + config->sns_strength = 80; + config->filter_sharpness = 3; + config->filter_strength = 30; + break; + case WEBP_PRESET_DRAWING: + config->sns_strength = 25; + config->filter_sharpness = 6; + config->filter_strength = 10; + break; + case WEBP_PRESET_ICON: + config->sns_strength = 0; + config->filter_strength = 0; // disable filtering to retain sharpness + break; + case WEBP_PRESET_TEXT: + config->sns_strength = 0; + config->filter_strength = 0; // disable filtering to retain sharpness + config->segments = 2; + break; + case WEBP_PRESET_DEFAULT: + default: + break; + } + return WebPValidateConfig(config); +} + +int WebPValidateConfig(const WebPConfig* config) { + if (config == NULL) return 0; + if (config->quality < 0 || config->quality > 100) + return 0; + if (config->target_size < 0) + return 0; + if (config->target_PSNR < 0) + return 0; + if (config->method < 0 || config->method > 6) + return 0; + if (config->segments < 1 || config->segments > 4) + return 0; + if (config->sns_strength < 0 || config->sns_strength > 100) + return 0; + if (config->filter_strength < 0 || config->filter_strength > 100) + return 0; + if (config->filter_sharpness < 0 || config->filter_sharpness > 7) + return 0; + if (config->filter_type < 0 || config->filter_type > 1) + return 0; + if (config->autofilter < 0 || config->autofilter > 1) + return 0; + if (config->pass < 1 || config->pass > 10) + return 0; + if (config->show_compressed < 0 || config->show_compressed > 1) + return 0; + if (config->preprocessing < 0 || config->preprocessing > 1) + return 0; + if (config->partitions < 0 || config->partitions > 3) + return 0; + if (config->partition_limit < 0 || config->partition_limit > 100) + return 0; + if (config->alpha_compression < 0) + return 0; + if (config->alpha_filtering < 0) + return 0; + if (config->alpha_quality < 0 || config->alpha_quality > 100) + return 0; + if (config->lossless < 0 || config->lossless > 1) + return 0; + if (config->image_hint >= WEBP_HINT_LAST) + return 0; + return 1; +} + +//------------------------------------------------------------------------------ + +#if defined(__cplusplus) || defined(c_plusplus) +} // extern "C" +#endif |