mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-19 10:30:30 +00:00
1cf3cae5e1
Add an element that converts AYUV video frames to a DVB subpicture stream. It's fairly simple for now. Later it would be good to support input via a stream that contains only GstVideoOverlayComposition meta. The element searches each input video frame for the largest sub-region containing non-transparent pixels and encodes that as a single DVB subpicture region. It can also do palette reduction of the input frames using code taken from libimagequant. There are various FIXME for potential improvements for now, but it works. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1227>
113 lines
4 KiB
C
113 lines
4 KiB
C
/*
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* http://pngquant.org
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*/
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#ifndef LIBIMAGEQUANT_H
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#define LIBIMAGEQUANT_H
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#ifndef LIQ_EXPORT
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#define LIQ_EXPORT extern
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#endif
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#define LIQ_VERSION 20401
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#define LIQ_VERSION_STRING "2.4.1"
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#ifndef LIQ_PRIVATE
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#if defined(__GNUC__) || defined (__llvm__)
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#define LIQ_PRIVATE __attribute__((visibility("hidden")))
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#else
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#define LIQ_PRIVATE
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#endif
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stddef.h>
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#include <glib.h>
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typedef struct liq_attr liq_attr;
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typedef struct liq_image liq_image;
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typedef struct liq_result liq_result;
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typedef struct liq_color {
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unsigned char r, g, b, a;
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} liq_color;
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typedef struct liq_palette {
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unsigned int count;
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liq_color entries[256];
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} liq_palette;
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typedef enum liq_error {
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LIQ_OK = 0,
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LIQ_QUALITY_TOO_LOW = 99,
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LIQ_VALUE_OUT_OF_RANGE = 100,
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LIQ_OUT_OF_MEMORY,
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LIQ_NOT_READY,
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LIQ_BITMAP_NOT_AVAILABLE,
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LIQ_BUFFER_TOO_SMALL,
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LIQ_INVALID_POINTER,
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} liq_error;
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enum liq_ownership {LIQ_OWN_ROWS=4, LIQ_OWN_PIXELS=8};
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LIQ_EXPORT liq_attr* liq_attr_create(void);
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LIQ_EXPORT liq_attr* liq_attr_create_with_allocator(void* (*malloc)(size_t), void (*free)(void*));
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LIQ_EXPORT liq_attr* liq_attr_copy(liq_attr *orig);
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LIQ_EXPORT void liq_attr_destroy(liq_attr *attr);
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LIQ_EXPORT liq_error liq_set_max_colors(liq_attr* attr, int colors);
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LIQ_EXPORT int liq_get_max_colors(const liq_attr* attr);
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LIQ_EXPORT liq_error liq_set_speed(liq_attr* attr, int speed);
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LIQ_EXPORT int liq_get_speed(const liq_attr* attr);
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LIQ_EXPORT liq_error liq_set_min_opacity(liq_attr* attr, int min);
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LIQ_EXPORT int liq_get_min_opacity(const liq_attr* attr);
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LIQ_EXPORT liq_error liq_set_min_posterization(liq_attr* attr, int bits);
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LIQ_EXPORT int liq_get_min_posterization(const liq_attr* attr);
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LIQ_EXPORT liq_error liq_set_quality(liq_attr* attr, int minimum, int maximum);
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LIQ_EXPORT int liq_get_min_quality(const liq_attr* attr);
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LIQ_EXPORT int liq_get_max_quality(const liq_attr* attr);
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LIQ_EXPORT void liq_set_last_index_transparent(liq_attr* attr, int is_last);
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typedef void liq_log_callback_function(const liq_attr*, const char *message, void* user_info);
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typedef void liq_log_flush_callback_function(const liq_attr*, void* user_info);
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LIQ_EXPORT void liq_set_log_callback(liq_attr*, liq_log_callback_function*, void* user_info);
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LIQ_EXPORT void liq_set_log_flush_callback(liq_attr*, liq_log_flush_callback_function*, void* user_info);
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LIQ_EXPORT liq_image *liq_image_create_rgba_rows(liq_attr *attr, void* rows[], int width, int height, double gamma);
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LIQ_EXPORT liq_image *liq_image_create_rgba(liq_attr *attr, void* bitmap, int width, int height, double gamma);
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typedef void liq_image_get_rgba_row_callback(liq_color row_out[], int row, int width, void* user_info);
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LIQ_EXPORT liq_image *liq_image_create_custom(liq_attr *attr, liq_image_get_rgba_row_callback *row_callback, void* user_info, int width, int height, double gamma);
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LIQ_EXPORT liq_error liq_image_set_memory_ownership(liq_image *image, int ownership_flags);
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LIQ_EXPORT liq_error liq_image_add_fixed_color(liq_image *img, liq_color color);
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LIQ_EXPORT int liq_image_get_width(const liq_image *img);
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LIQ_EXPORT int liq_image_get_height(const liq_image *img);
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LIQ_EXPORT void liq_image_destroy(liq_image *img);
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LIQ_EXPORT liq_result *liq_quantize_image(liq_attr *options, liq_image *input_image);
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LIQ_EXPORT liq_error liq_set_dithering_level(liq_result *res, float dither_level);
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LIQ_EXPORT liq_error liq_set_output_gamma(liq_result* res, double gamma);
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LIQ_EXPORT double liq_get_output_gamma(const liq_result *result);
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LIQ_EXPORT const liq_palette *liq_get_palette(liq_result *result);
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LIQ_EXPORT liq_error liq_write_remapped_image(liq_result *result, liq_image *input_image, void *buffer, size_t buffer_size);
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LIQ_EXPORT liq_error liq_write_remapped_image_rows(liq_result *result, liq_image *input_image, unsigned char **row_pointers);
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LIQ_EXPORT double liq_get_quantization_error(liq_result *result);
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LIQ_EXPORT int liq_get_quantization_quality(liq_result *result);
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LIQ_EXPORT void liq_result_destroy(liq_result *);
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LIQ_EXPORT int liq_version(void);
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#ifdef __cplusplus
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}
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#endif
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#endif
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