FFmpeg
|
Color conversion and scaling library. More...
Files | |
file | swscale.h |
Data Structures | |
struct | SwsContext |
Main external API structure. More... | |
struct | SwsVector |
struct | SwsFilter |
Macros | |
#define | SWS_SRC_V_CHR_DROP_MASK 0x30000 |
#define | SWS_SRC_V_CHR_DROP_SHIFT 16 |
#define | SWS_PARAM_DEFAULT 123456 |
#define | SWS_MAX_REDUCE_CUTOFF 0.002 |
#define | SWS_CS_ITU709 1 |
#define | SWS_CS_FCC 4 |
#define | SWS_CS_ITU601 5 |
#define | SWS_CS_ITU624 5 |
#define | SWS_CS_SMPTE170M 5 |
#define | SWS_CS_SMPTE240M 7 |
#define | SWS_CS_DEFAULT 5 |
#define | SWS_CS_BT2020 9 |
Enumerations | |
enum | SwsDither { SWS_DITHER_NONE = 0, SWS_DITHER_AUTO, SWS_DITHER_BAYER, SWS_DITHER_ED, SWS_DITHER_A_DITHER, SWS_DITHER_X_DITHER, SWS_DITHER_NB } |
enum | SwsAlphaBlend { SWS_ALPHA_BLEND_NONE = 0, SWS_ALPHA_BLEND_UNIFORM, SWS_ALPHA_BLEND_CHECKERBOARD, SWS_ALPHA_BLEND_NB } |
enum | SwsFlags { SWS_FAST_BILINEAR = 1 << 0, SWS_BILINEAR = 1 << 1, SWS_BICUBIC = 1 << 2, SWS_X = 1 << 3, SWS_POINT = 1 << 4, SWS_AREA = 1 << 5, SWS_BICUBLIN = 1 << 6, SWS_GAUSS = 1 << 7, SWS_SINC = 1 << 8, SWS_LANCZOS = 1 << 9, SWS_SPLINE = 1 << 10, SWS_STRICT = 1 << 11, SWS_PRINT_INFO = 1 << 12, SWS_FULL_CHR_H_INT = 1 << 13, SWS_FULL_CHR_H_INP = 1 << 14, SWS_ACCURATE_RND = 1 << 18, SWS_BITEXACT = 1 << 19, SWS_DIRECT_BGR = 1 << 15, SWS_ERROR_DIFFUSION = 1 << 23 } |
enum | SwsIntent { SWS_INTENT_PERCEPTUAL = 0, SWS_INTENT_RELATIVE_COLORIMETRIC = 1, SWS_INTENT_SATURATION = 2, SWS_INTENT_ABSOLUTE_COLORIMETRIC = 3, SWS_INTENT_NB } |
Functions | |
unsigned | swscale_version (void) |
const char * | swscale_configuration (void) |
Return the libswscale build-time configuration. More... | |
const char * | swscale_license (void) |
Return the libswscale license. More... | |
const AVClass * | sws_get_class (void) |
Get the AVClass for SwsContext. More... | |
SwsContext * | sws_alloc_context (void) |
Allocate an empty SwsContext and set its fields to default values. More... | |
void | sws_free_context (SwsContext **ctx) |
Free the context and everything associated with it, and write NULL to the provided pointer. More... | |
int | sws_test_format (enum AVPixelFormat format, int output) |
Test if a given pixel format is supported. More... | |
int | sws_test_colorspace (enum AVColorSpace colorspace, int output) |
Test if a given color space is supported. More... | |
int | sws_test_primaries (enum AVColorPrimaries primaries, int output) |
Test if a given set of color primaries is supported. More... | |
int | sws_test_transfer (enum AVColorTransferCharacteristic trc, int output) |
Test if a given color transfer function is supported. More... | |
int | sws_test_frame (const AVFrame *frame, int output) |
Helper function to run all sws_test_* against a frame, as well as testing the basic frame properties for sanity. More... | |
int | sws_frame_setup (SwsContext *ctx, const AVFrame *dst, const AVFrame *src) |
Like sws_scale_frame , but without actually scaling. More... | |
int | sws_is_noop (const AVFrame *dst, const AVFrame *src) |
Check if a given conversion is a noop. More... | |
int | sws_scale_frame (SwsContext *c, AVFrame *dst, const AVFrame *src) |
Scale source data from src and write the output to dst . More... | |
const int * | sws_getCoefficients (int colorspace) |
Return a pointer to yuv<->rgb coefficients for the given colorspace suitable for sws_setColorspaceDetails(). More... | |
int | sws_isSupportedInput (enum AVPixelFormat pix_fmt) |
Return a positive value if pix_fmt is a supported input format, 0 otherwise. More... | |
int | sws_isSupportedOutput (enum AVPixelFormat pix_fmt) |
Return a positive value if pix_fmt is a supported output format, 0 otherwise. More... | |
int | sws_isSupportedEndiannessConversion (enum AVPixelFormat pix_fmt) |
av_warn_unused_result int | sws_init_context (SwsContext *sws_context, SwsFilter *srcFilter, SwsFilter *dstFilter) |
Initialize the swscaler context sws_context. More... | |
void | sws_freeContext (SwsContext *swsContext) |
Free the swscaler context swsContext. More... | |
SwsContext * | sws_getContext (int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param) |
Allocate and return an SwsContext. More... | |
int | sws_scale (SwsContext *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[]) |
Scale the image slice in srcSlice and put the resulting scaled slice in the image in dst. More... | |
int | sws_frame_start (SwsContext *c, AVFrame *dst, const AVFrame *src) |
Initialize the scaling process for a given pair of source/destination frames. More... | |
void | sws_frame_end (SwsContext *c) |
Finish the scaling process for a pair of source/destination frames previously submitted with sws_frame_start(). More... | |
int | sws_send_slice (SwsContext *c, unsigned int slice_start, unsigned int slice_height) |
Indicate that a horizontal slice of input data is available in the source frame previously provided to sws_frame_start(). More... | |
int | sws_receive_slice (SwsContext *c, unsigned int slice_start, unsigned int slice_height) |
Request a horizontal slice of the output data to be written into the frame previously provided to sws_frame_start(). More... | |
unsigned int | sws_receive_slice_alignment (const SwsContext *c) |
Get the alignment required for slices. More... | |
int | sws_setColorspaceDetails (SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation) |
int | sws_getColorspaceDetails (SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation) |
SwsVector * | sws_allocVec (int length) |
Allocate and return an uninitialized vector with length coefficients. More... | |
SwsVector * | sws_getGaussianVec (double variance, double quality) |
Return a normalized Gaussian curve used to filter stuff quality = 3 is high quality, lower is lower quality. More... | |
void | sws_scaleVec (SwsVector *a, double scalar) |
Scale all the coefficients of a by the scalar value. More... | |
void | sws_normalizeVec (SwsVector *a, double height) |
Scale all the coefficients of a so that their sum equals height. More... | |
void | sws_freeVec (SwsVector *a) |
SwsFilter * | sws_getDefaultFilter (float lumaGBlur, float chromaGBlur, float lumaSharpen, float chromaSharpen, float chromaHShift, float chromaVShift, int verbose) |
void | sws_freeFilter (SwsFilter *filter) |
SwsContext * | sws_getCachedContext (SwsContext *context, int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param) |
Check if context can be reused, otherwise reallocate a new one. More... | |
void | sws_convertPalette8ToPacked32 (const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette) |
Convert an 8-bit paletted frame into a frame with a color depth of 32 bits. More... | |
void | sws_convertPalette8ToPacked24 (const uint8_t *src, uint8_t *dst, int num_pixels, const uint8_t *palette) |
Convert an 8-bit paletted frame into a frame with a color depth of 24 bits. More... | |
Color conversion and scaling library.
Return the LIBSWSCALE_VERSION_INT constant.
enum SwsDither |
enum SwsAlphaBlend |
enum SwsFlags |
Enumerator | |
---|---|
SWS_FAST_BILINEAR | Scaler selection options. Only one may be active at a time. fast bilinear filtering |
SWS_BILINEAR | bilinear filtering |
SWS_BICUBIC | 2-tap cubic B-spline |
SWS_X | experimental |
SWS_POINT | nearest neighbor |
SWS_AREA | area averaging |
SWS_BICUBLIN | bicubic luma, bilinear chroma |
SWS_GAUSS | gaussian approximation |
SWS_SINC | unwindowed sinc |
SWS_LANCZOS | 3-tap sinc/sinc |
SWS_SPLINE | cubic Keys spline |
SWS_STRICT | Return an error on underspecified conversions. Without this flag, unspecified fields are defaulted to sensible values. |
SWS_PRINT_INFO | Emit verbose log of scaling parameters. |
SWS_FULL_CHR_H_INT | Perform full chroma upsampling when upscaling to RGB. For example, when converting 50x50 yuv420p to 100x100 rgba, setting this flag will scale the chroma plane from 25x25 to 100x100 (4:4:4), and then convert the 100x100 yuv444p image to rgba in the final output step. Without this flag, the chroma plane is instead scaled to 50x100 (4:2:2), with a single chroma sample being re-used for both of the horizontally adjacent RGBA output pixels. |
SWS_FULL_CHR_H_INP | Perform full chroma interpolation when downscaling RGB sources. For example, when converting a 100x100 rgba source to 50x50 yuv444p, setting this flag will generate a 100x100 (4:4:4) chroma plane, which is then downscaled to the required 50x50. Without this flag, the chroma plane is instead generated at 50x100 (dropping every other pixel), before then being downscaled to the required 50x50 resolution. |
SWS_ACCURATE_RND | Force bit-exact output. This will prevent the use of platform-specific optimizations that may lead to slight difference in rounding, in favor of always maintaining exact bit output compatibility with the reference C code. Note: It is recommended to set both of these flags simultaneously. |
SWS_BITEXACT | |
SWS_DIRECT_BGR | Deprecated flags. This flag has no effect |
SWS_ERROR_DIFFUSION | Set |
enum SwsIntent |
const char* swscale_configuration | ( | void | ) |
const char* swscale_license | ( | void | ) |
const AVClass* sws_get_class | ( | void | ) |
Get the AVClass for SwsContext.
It can be used in combination with AV_OPT_SEARCH_FAKE_OBJ for examining options.
Definition at line 106 of file options.c.
Referenced by child_class_iterate(), opt_default(), scale2ref_child_class_iterate(), and show_help_default().
SwsContext* sws_alloc_context | ( | void | ) |
Allocate an empty SwsContext and set its fields to default values.
Definition at line 1230 of file utils.c.
Referenced by add_legacy_sws_pass(), alloc_set_opts(), check_chrConvertRange(), check_hscale(), check_input_planar_rgb_to_a(), check_input_planar_rgb_to_uv(), check_input_planar_rgb_to_y(), check_lumConvertRange(), check_output_yuv2gbrp(), check_yuv2nv12cX(), check_yuv2yuv1(), check_yuv2yuvX(), context_init_threaded(), draw_qrcode(), init_legacy_subpass(), LLVMFuzzerTestOneInput(), main(), output_single_frame(), preinit(), scale_legacy(), and sws_getCachedContext().
void sws_free_context | ( | SwsContext ** | ctx | ) |
Free the context and everything associated with it, and write NULL to the provided pointer.
Definition at line 2529 of file utils.c.
Referenced by add_legacy_sws_pass(), free_legacy_swscale(), init_legacy_subpass(), main(), sws_getCachedContext(), and uninit().
int sws_test_format | ( | enum AVPixelFormat | format, |
int | output | ||
) |
Test if a given pixel format is supported.
output | If 0, test if compatible with the source/input frame; otherwise, with the destination/output frame. |
format | The format to check. |
Definition at line 2874 of file utils.c.
Referenced by ff_test_fmt(), query_formats(), and run_self_tests().
int sws_test_colorspace | ( | enum AVColorSpace | colorspace, |
int | output | ||
) |
Test if a given color space is supported.
output | If 0, test if compatible with the source/input frame; otherwise, with the destination/output frame. |
colorspace | The colorspace to check. |
Definition at line 2879 of file utils.c.
Referenced by ff_test_fmt(), init(), and query_formats().
int sws_test_primaries | ( | enum AVColorPrimaries | primaries, |
int | output | ||
) |
Test if a given set of color primaries is supported.
output | If 0, test if compatible with the source/input frame; otherwise, with the destination/output frame. |
primaries | The color primaries to check. |
Definition at line 2896 of file utils.c.
Referenced by ff_test_fmt(), and init().
int sws_test_transfer | ( | enum AVColorTransferCharacteristic | trc, |
int | output | ||
) |
Test if a given color transfer function is supported.
output | If 0, test if compatible with the source/input frame; otherwise, with the destination/output frame. |
trc | The color transfer function to check. |
Definition at line 2902 of file utils.c.
Referenced by ff_test_fmt(), and init().
int sws_test_frame | ( | const AVFrame * | frame, |
int | output | ||
) |
int sws_frame_setup | ( | SwsContext * | ctx, |
const AVFrame * | dst, | ||
const AVFrame * | src | ||
) |
Like sws_scale_frame
, but without actually scaling.
It will instead merely initialize internal state that would be required to perform the operation, as well as returning the correct error code for unsupported frame combinations.
ctx | The scaling context. |
dst | The destination frame to consider. |
src | The source frame to consider. |
Definition at line 1423 of file swscale.c.
Referenced by sws_scale_frame().
Check if a given conversion is a noop.
Returns a positive integer if no operation needs to be performed, 0 otherwise.
Definition at line 2943 of file utils.c.
Referenced by scale_frame().
int sws_scale_frame | ( | SwsContext * | c, |
AVFrame * | dst, | ||
const AVFrame * | src | ||
) |
Scale source data from src
and write the output to dst
.
This function can be used directly on an allocated context, without setting up any frame properties or calling sws_init_context()
. Such usage is fully dynamic and does not require reallocation if the frame properties change.
Alternatively, this function can be called on a context that has been explicitly initialized. However, this is provided only for backwards compatibility. In this usage mode, all frame properties must be correctly set at init time, and may no longer change after initialization.
ctx | The scaling context. |
dst | The destination frame. The data buffers may either be already allocated by the caller or left clear, in which case they will be allocated by the scaler. The latter may have performance advantages - e.g. in certain cases some (or all) output planes may be references to input planes, rather than copies. |
src | The source frame. If the data buffers are set to NULL, then this function behaves identically to sws_frame_setup . |
Definition at line 1347 of file swscale.c.
Referenced by main(), recon_frame_process(), run_test(), scale_frame(), and scale_legacy().
const int* sws_getCoefficients | ( | int | colorspace | ) |
Return a pointer to yuv<->rgb coefficients for the given colorspace suitable for sws_setColorspaceDetails().
colorspace | One of the SWS_CS_* macros. If invalid, SWS_CS_DEFAULT is used. |
Definition at line 61 of file yuv2rgb.c.
Referenced by add_legacy_sws_pass().
int sws_isSupportedInput | ( | enum AVPixelFormat | pix_fmt | ) |
Return a positive value if pix_fmt is a supported input format, 0 otherwise.
Definition at line 376 of file utils.c.
Referenced by ff_sws_init_single_context(), and sws_test_format().
int sws_isSupportedOutput | ( | enum AVPixelFormat | pix_fmt | ) |
Return a positive value if pix_fmt is a supported output format, 0 otherwise.
Definition at line 382 of file utils.c.
Referenced by ff_sws_init_single_context(), and sws_test_format().
int sws_isSupportedEndiannessConversion | ( | enum AVPixelFormat | pix_fmt | ) |
[in] | pix_fmt | the pixel format |
Definition at line 388 of file utils.c.
Referenced by ff_sws_init_single_context().
av_warn_unused_result int sws_init_context | ( | SwsContext * | sws_context, |
SwsFilter * | srcFilter, | ||
SwsFilter * | dstFilter | ||
) |
Initialize the swscaler context sws_context.
This function is considered deprecated, and provided only for backwards compatibility with sws_scale() and sws_start_frame(). The preferred way to use libswscale is to set all frame properties correctly and call sws_scale_frame() directly, without explicitly initializing the context.
Definition at line 2085 of file utils.c.
Referenced by add_legacy_sws_pass(), check_chrConvertRange(), check_hscale(), check_input_planar_rgb_to_a(), check_input_planar_rgb_to_uv(), check_input_planar_rgb_to_y(), check_lumConvertRange(), check_output_yuv2gbrp(), check_yuv2nv12cX(), check_yuv2yuv1(), check_yuv2yuvX(), draw_qrcode(), ff_sws_init_single_context(), LLVMFuzzerTestOneInput(), output_single_frame(), scale_legacy(), sws_getCachedContext(), sws_getContext(), and sws_setColorspaceDetails().
void sws_freeContext | ( | SwsContext * | swsContext | ) |
Free the swscaler context swsContext.
If swsContext is NULL, then does nothing.
Definition at line 2450 of file utils.c.
Referenced by check_chrConvertRange(), check_hscale(), check_input_planar_rgb_to_a(), check_input_planar_rgb_to_uv(), check_input_planar_rgb_to_y(), check_lumConvertRange(), check_output_yuv2gbrp(), check_semiplanar(), check_yuv2nv12cX(), check_yuv2rgb(), check_yuv2yuv1(), check_yuv2yuvX(), checkasm_check_sw_rgb(), close_filter_param(), close_stream(), draw_qrcode(), ff_frame_to_dnn_classify(), ff_frame_to_dnn_detect(), ff_proc_from_dnn_to_frame(), ff_proc_from_frame_to_dnn(), ff_scale_image(), ff_sws_init_single_context(), LLVMFuzzerTestOneInput(), main(), output_single_frame(), scale_legacy(), stream_close(), sws_free_context(), sws_getContext(), and uninit().
SwsContext* sws_getContext | ( | int | srcW, |
int | srcH, | ||
enum AVPixelFormat | srcFormat, | ||
int | dstW, | ||
int | dstH, | ||
enum AVPixelFormat | dstFormat, | ||
int | flags, | ||
SwsFilter * | srcFilter, | ||
SwsFilter * | dstFilter, | ||
const double * | param | ||
) |
Allocate and return an SwsContext.
You need it to perform scaling/conversion operations using sws_scale().
srcW | the width of the source image |
srcH | the height of the source image |
srcFormat | the source image format |
dstW | the width of the destination image |
dstH | the height of the destination image |
dstFormat | the destination image format |
flags | specify which algorithm and options to use for rescaling |
param | extra parameters to tune the used scaler For SWS_BICUBIC param[0] and [1] tune the shape of the basis function, param[0] tunes f(1) and param[1] f´(1) For SWS_GAUSS param[0] tunes the exponent and thus cutoff frequency For SWS_LANCZOS param[0] tunes the width of the window function |
Definition at line 2119 of file utils.c.
Referenced by check_semiplanar(), check_yuv2packed1(), check_yuv2packed2(), check_yuv2packedX(), check_yuv2rgb(), checkasm_check_sw_rgb(), config_output(), ff_frame_to_dnn_classify(), ff_frame_to_dnn_detect(), ff_proc_from_dnn_to_frame(), ff_proc_from_frame_to_dnn(), ff_scale_image(), ff_sws_init_single_context(), get_video_frame(), main(), open_filter_param(), prepare_uv_scale(), process_frame(), and recon_frame_process().
int sws_scale | ( | SwsContext * | sws, |
const uint8_t *const | srcSlice[], | ||
const int | srcStride[], | ||
int | srcSliceY, | ||
int | srcSliceH, | ||
uint8_t *const | dst[], | ||
const int | dstStride[] | ||
) |
Scale the image slice in srcSlice and put the resulting scaled slice in the image in dst.
A slice is a sequence of consecutive rows in an image. Requires a context that has been previously been initialized with sws_init_context().
Slices have to be provided in sequential order, either in top-bottom or bottom-top order. If slices are provided in non-sequential order the behavior of the function is undefined.
c | the scaling context previously created with sws_getContext() |
srcSlice | the array containing the pointers to the planes of the source slice |
srcStride | the array containing the strides for each plane of the source image |
srcSliceY | the position in the source image of the slice to process, that is the number (counted starting from zero) in the image of the first row of the slice |
srcSliceH | the height of the source slice, that is the number of rows in the slice |
dst | the array containing the pointers to the planes of the destination image |
dstStride | the array containing the strides for each plane of the destination image |
Scale the image slice in srcSlice and put the resulting scaled slice in the image in dst.
Assumes planar YUV to be in YUV order instead of YVU.
Definition at line 1497 of file swscale.c.
Referenced by blur(), copy_uv_planes(), draw_qrcode(), ff_frame_to_dnn_classify(), ff_frame_to_dnn_detect(), ff_proc_from_dnn_to_frame(), ff_proc_from_frame_to_dnn(), ff_scale_image(), filter_frame(), get_video_frame(), LLVMFuzzerTestOneInput(), main(), output_single_frame(), process_frame(), video_image_display(), and wrap().
int sws_frame_start | ( | SwsContext * | c, |
AVFrame * | dst, | ||
const AVFrame * | src | ||
) |
Initialize the scaling process for a given pair of source/destination frames.
Must be called before any calls to sws_send_slice() and sws_receive_slice(). Requires a context that has been previously been initialized with sws_init_context().
This function will retain references to src and dst, so they must both use refcounted buffers (if allocated by the caller, in case of dst).
c | The scaling context |
dst | The destination frame. The data buffers may either be already allocated by the caller or left clear, in which case they will be allocated by the scaler. The latter may have performance advantages - e.g. in certain cases some output planes may be references to input planes, rather than copies. Output data will be written into this frame in successful sws_receive_slice() calls. |
src | The source frame. The data buffers must be allocated, but the frame data does not have to be ready at this point. Data availability is then signalled by sws_send_slice(). |
Definition at line 1194 of file swscale.c.
Referenced by sws_scale_frame().
void sws_frame_end | ( | SwsContext * | c | ) |
Finish the scaling process for a pair of source/destination frames previously submitted with sws_frame_start().
Must be called after all sws_send_slice() and sws_receive_slice() calls are done, before any new sws_frame_start() calls.
c | The scaling context |
Definition at line 1186 of file swscale.c.
Referenced by sws_scale_frame().
int sws_send_slice | ( | SwsContext * | c, |
unsigned int | slice_start, | ||
unsigned int | slice_height | ||
) |
Indicate that a horizontal slice of input data is available in the source frame previously provided to sws_frame_start().
The slices may be provided in any order, but may not overlap. For vertically subsampled pixel formats, the slices must be aligned according to subsampling.
c | The scaling context |
slice_start | first row of the slice |
slice_height | number of rows in the slice |
Definition at line 1225 of file swscale.c.
Referenced by sws_scale_frame().
int sws_receive_slice | ( | SwsContext * | c, |
unsigned int | slice_start, | ||
unsigned int | slice_height | ||
) |
Request a horizontal slice of the output data to be written into the frame previously provided to sws_frame_start().
c | The scaling context |
slice_start | first row of the slice; must be a multiple of sws_receive_slice_alignment() |
slice_height | number of rows in the slice; must be a multiple of sws_receive_slice_alignment(), except for the last slice (i.e. when slice_start+slice_height is equal to output frame height) |
Definition at line 1247 of file swscale.c.
Referenced by sws_scale_frame().
unsigned int sws_receive_slice_alignment | ( | const SwsContext * | c | ) |
Get the alignment required for slices.
Requires a context that has been previously been initialized with sws_init_context().
c | The scaling context |
Definition at line 1238 of file swscale.c.
Referenced by sws_receive_slice().
int sws_setColorspaceDetails | ( | SwsContext * | c, |
const int | inv_table[4], | ||
int | srcRange, | ||
const int | table[4], | ||
int | dstRange, | ||
int | brightness, | ||
int | contrast, | ||
int | saturation | ||
) |
c | the scaling context |
dstRange | flag indicating the while-black range of the output (1=jpeg / 0=mpeg) |
srcRange | flag indicating the while-black range of the input (1=jpeg / 0=mpeg) |
table | the yuv2rgb coefficients describing the output yuv space, normally ff_yuv2rgb_coeffs[x] |
inv_table | the yuv2rgb coefficients describing the input yuv space, normally ff_yuv2rgb_coeffs[x] |
brightness | 16.16 fixed point brightness correction |
contrast | 16.16 fixed point contrast correction |
saturation | 16.16 fixed point saturation correction |
LIBSWSCALE_VERSION_MAJOR < 7
, returns -1 if not supported. Definition at line 1049 of file utils.c.
Referenced by add_legacy_sws_pass(), ff_sws_init_single_context(), and init_legacy_subpass().
int sws_getColorspaceDetails | ( | SwsContext * | c, |
int ** | inv_table, | ||
int * | srcRange, | ||
int ** | table, | ||
int * | dstRange, | ||
int * | brightness, | ||
int * | contrast, | ||
int * | saturation | ||
) |
LIBSWSCALE_VERSION_MAJOR < 7
, returns -1 if not supported. Definition at line 1205 of file utils.c.
Referenced by add_legacy_sws_pass().
SwsVector* sws_allocVec | ( | int | length | ) |
Allocate and return an uninitialized vector with length coefficients.
Definition at line 2156 of file utils.c.
Referenced by sws_getConstVec(), and sws_getGaussianVec().
Return a normalized Gaussian curve used to filter stuff quality = 3 is high quality, lower is lower quality.
Definition at line 2173 of file utils.c.
Referenced by alloc_sws_context(), open_filter_param(), and sws_getDefaultFilter().
Scale all the coefficients of a by the scalar value.
Definition at line 2239 of file utils.c.
Referenced by alloc_sws_context(), sws_getDefaultFilter(), and sws_normalizeVec().
Scale all the coefficients of a so that their sum equals height.
Definition at line 2247 of file utils.c.
Referenced by sws_getDefaultFilter(), and sws_getGaussianVec().
void sws_freeVec | ( | SwsVector * | a | ) |
Definition at line 2346 of file utils.c.
Referenced by alloc_sws_context(), open_filter_param(), sws_freeFilter(), and sws_getDefaultFilter().
SwsContext* sws_getCachedContext | ( | SwsContext * | context, |
int | srcW, | ||
int | srcH, | ||
enum AVPixelFormat | srcFormat, | ||
int | dstW, | ||
int | dstH, | ||
enum AVPixelFormat | dstFormat, | ||
int | flags, | ||
SwsFilter * | srcFilter, | ||
SwsFilter * | dstFilter, | ||
const double * | param | ||
) |
Check if context can be reused, otherwise reallocate a new one.
If context is NULL, just calls sws_getContext() to get a new context. Otherwise, checks if the parameters are the ones already saved in context. If that is the case, returns the current context. Otherwise, frees context and gets a new context with the new parameters.
Be warned that srcFilter and dstFilter are not checked, they are assumed to remain the same.
Definition at line 2539 of file utils.c.
Referenced by alloc_sws_context(), and video_image_display().
void sws_convertPalette8ToPacked32 | ( | const uint8_t * | src, |
uint8_t * | dst, | ||
int | num_pixels, | ||
const uint8_t * | palette | ||
) |
Convert an 8-bit paletted frame into a frame with a color depth of 32 bits.
The output frame will have the same packed format as the palette.
src | source frame buffer |
dst | destination frame buffer |
num_pixels | number of pixels to convert |
palette | array with [256] entries, which must match color arrangement (RGB or BGR) of src |
Definition at line 2609 of file swscale_unscaled.c.
Referenced by palToRgbWrapper().
void sws_convertPalette8ToPacked24 | ( | const uint8_t * | src, |
uint8_t * | dst, | ||
int | num_pixels, | ||
const uint8_t * | palette | ||
) |
Convert an 8-bit paletted frame into a frame with a color depth of 24 bits.
With the palette format "ABCD", the destination frame ends up with the format "ABC".
src | source frame buffer |
dst | destination frame buffer |
num_pixels | number of pixels to convert |
palette | array with [256] entries, which must match color arrangement (RGB or BGR) of src |
Definition at line 2619 of file swscale_unscaled.c.
Referenced by palToRgbWrapper().