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swscale: add SWS_UNSTABLE flag

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Give users and developers a way to opt in to the new format conversion code,
and more code from the swscale rewrite in general, even while development is
still ongoing.
This commit is contained in:
Niklas Haas
2025-03-31 12:22:34 +02:00
parent 8406c56b0c
commit ce0938da8c
5 changed files with 16 additions and 1 deletions
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3
doc/APIchanges
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@@ -2,6 +2,9 @@ The last version increases of all libraries were on 2025-03-28
API changes, most recent first: API changes, most recent first:
2025-09-xx - xxxxxxxxxx - lsws 9.3.100 - swscale.h
Add SWS_UNSTABLE flag.
2025-09-01 - xxxxxxxx - lavc 62.14.100 - packet.h 2025-09-01 - xxxxxxxx - lavc 62.14.100 - packet.h
Add AV_PKT_DATA_EXIF Add AV_PKT_DATA_EXIF

4
doc/scaler.texi
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@@ -68,6 +68,10 @@ Select full chroma input.
@item bitexact @item bitexact
Enable bitexact output. Enable bitexact output.
@item unstable
Allow the use of experimental new code. May subtly affect the output or even
produce wrong results. For testing only.
@end table @end table
@item srcw @var{(API only)} @item srcw @var{(API only)}

1
libswscale/options.c
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@@ -50,6 +50,7 @@ static const AVOption swscale_options[] = {
{ "full_chroma_inp", "full chroma input", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_FULL_CHR_H_INP }, .flags = VE, .unit = "sws_flags" }, { "full_chroma_inp", "full chroma input", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_FULL_CHR_H_INP }, .flags = VE, .unit = "sws_flags" },
{ "bitexact", "bit-exact mode", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_BITEXACT }, .flags = VE, .unit = "sws_flags" }, { "bitexact", "bit-exact mode", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_BITEXACT }, .flags = VE, .unit = "sws_flags" },
{ "error_diffusion", "error diffusion dither", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_ERROR_DIFFUSION}, .flags = VE, .unit = "sws_flags" }, { "error_diffusion", "error diffusion dither", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_ERROR_DIFFUSION}, .flags = VE, .unit = "sws_flags" },
{ "unstable", "allow experimental new code", 0, AV_OPT_TYPE_CONST, { .i64 = SWS_UNSTABLE }, .flags = VE, .unit = "sws_flags" },
{ "param0", "scaler param 0", OFFSET(scaler_params[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, VE }, { "param0", "scaler param 0", OFFSET(scaler_params[0]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, VE },
{ "param1", "scaler param 1", OFFSET(scaler_params[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, VE }, { "param1", "scaler param 1", OFFSET(scaler_params[1]), AV_OPT_TYPE_DOUBLE, { .dbl = SWS_PARAM_DEFAULT }, INT_MIN, INT_MAX, VE },

7
libswscale/swscale.h
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@@ -155,6 +155,13 @@ typedef enum SwsFlags {
SWS_ACCURATE_RND = 1 << 18, SWS_ACCURATE_RND = 1 << 18,
SWS_BITEXACT = 1 << 19, SWS_BITEXACT = 1 << 19,
/**
* Allow using experimental new code paths. This may be faster, slower,
* or produce different output, with semantics subject to change at any
* point in time. For testing and debugging purposes only.
*/
SWS_UNSTABLE = 1 << 20,
/** /**
* Deprecated flags. * Deprecated flags.
*/ */

2
libswscale/version.h
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@@ -28,7 +28,7 @@
#include "version_major.h" #include "version_major.h"
#define LIBSWSCALE_VERSION_MINOR 2 #define LIBSWSCALE_VERSION_MINOR 3
#define LIBSWSCALE_VERSION_MICRO 100 #define LIBSWSCALE_VERSION_MICRO 100
#define LIBSWSCALE_VERSION_INT AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \ #define LIBSWSCALE_VERSION_INT AV_VERSION_INT(LIBSWSCALE_VERSION_MAJOR, \