diff options
Diffstat (limited to 'libswscale/swscale_internal.h')
-rw-r--r-- | libswscale/swscale_internal.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h index 852dd94b21..2e69e27901 100644 --- a/libswscale/swscale_internal.h +++ b/libswscale/swscale_internal.h @@ -276,6 +276,9 @@ typedef void (*yuv2anyX_fn)(struct SwsContext *c, const int16_t *lumFilter, const int16_t **alpSrc, uint8_t **dest, int dstW, int y); +struct SwsSlice; +struct SwsFilterDescriptor; + /* This struct should be aligned on at least a 32-byte boundary. */ typedef struct SwsContext { /** @@ -326,6 +329,12 @@ typedef struct SwsContext { uint16_t *gamma; uint16_t *inv_gamma; + int numDesc; + int descIndex[2]; + int numSlice; + struct SwsSlice *slice; + struct SwsFilterDescriptor *desc; + uint32_t pal_yuv[256]; uint32_t pal_rgb[256]; @@ -934,4 +943,95 @@ static inline void fillPlane16(uint8_t *plane, int stride, int width, int height } } +#define MAX_SLICE_PLANES 4 + +/// Slice plane +typedef struct SwsPlane +{ + int available_lines; ///< max number of lines that can be hold by this plane + int sliceY; ///< index of first line + int sliceH; ///< number of lines + uint8_t **line; ///< line buffer + uint8_t **tmp; ///< Tmp line buffer used by mmx code +} SwsPlane; + +/** + * Struct which defines a slice of an image to be scaled or a output for + * a scaled slice. + * A slice can also be used as intermediate ring buffer for scaling steps. + */ +typedef struct SwsSlice +{ + int width; ///< Slice line width + int h_chr_sub_sample; ///< horizontal chroma subsampling factor + int v_chr_sub_sample; ///< vertical chroma subsampling factor + int is_ring; ///< flag to identify if this slice is a ring buffer + int should_free_lines; ///< flag to identify if there are dynamic allocated lines + enum AVPixelFormat fmt; ///< planes pixel format + SwsPlane plane[MAX_SLICE_PLANES]; ///< color planes +} SwsSlice; + +/** + * Struct which holds all necessary data for processing a slice. + * A processing step can be a color conversion or horizontal/vertical scaling. + */ +typedef struct SwsFilterDescriptor +{ + SwsSlice *src; ///< Source slice + SwsSlice *dst; ///< Output slice + + int alpha; ///< Flag for processing alpha channel + void *instance; ///< Filter instance data + + /// Function for processing input slice sliceH lines starting from line sliceY + int (*process)(SwsContext *c, struct SwsFilterDescriptor *desc, int sliceY, int sliceH); +} SwsFilterDescriptor; + +/// Color conversion instance data +typedef struct ColorContext +{ + uint32_t *pal; +} ColorContext; + +/// Scaler instance data +typedef struct FilterContext +{ + uint16_t *filter; + int *filter_pos; + int filter_size; + int xInc; +} FilterContext; + +// warp input lines in the form (src + width*i + j) to slice format (line[i][j]) +int ff_init_slice_from_src(SwsSlice * s, uint8_t *src[4], int stride[4], int srcW, int lumY, int lumH, int chrY, int chrH); + +// Initialize scaler filter descriptor chain +int ff_init_filters(SwsContext *c); + +// Free all filter data +int ff_free_filters(SwsContext *c); + +/* + function for applying ring buffer logic into slice s + It checks if the slice can hold more @lum lines, if yes + do nothing otherwise remove @lum least used lines. + It applyes the same procedure for @chr lines. +*/ +int ff_rotate_slice(SwsSlice *s, int lum, int chr); + + +/// initializes lum pixel format conversion descriptor +int ff_init_desc_fmt_convert(SwsFilterDescriptor *desc, SwsSlice * src, SwsSlice *dst, uint32_t *pal); + +/// initializes lum horizontal scaling descriptor +int ff_init_desc_hscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc); + +/// initializes chr prixel format conversion descriptor +int ff_init_desc_cfmt_convert(SwsFilterDescriptor *desc, SwsSlice * src, SwsSlice *dst, uint32_t *pal); + +/// initializes chr horizontal scaling descriptor +int ff_init_desc_chscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc); + +int ff_init_desc_no_chr(SwsFilterDescriptor *desc, SwsSlice * src, SwsSlice *dst); + #endif /* SWSCALE_SWSCALE_INTERNAL_H */ |