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lavc: add new unsafe_output hwaccel_flag

This commit is contained in:
Timo Rothenpieler 2022-12-05 22:32:46 +01:00
parent 9651f873f8
commit 7a8d78f7e3
4 changed files with 22 additions and 2 deletions
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3
doc/APIchanges
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@ -14,6 +14,9 @@ libavutil: 2021-04-27
API changes, most recent first:
2022-12-xx - xxxxxxxxxx - lavc 59.55.100 - avcodec.h
Add AV_HWACCEL_FLAG_UNSAFE_OUTPUT.
2022-11-xx - xxxxxxxxxx - lavu 57.43.100 - tx.h
Add AV_TX_FLOAT_DCT, AV_TX_DOUBLE_DCT and AV_TX_INT32_DCT.

16
libavcodec/avcodec.h
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@ -2253,6 +2253,22 @@ typedef struct AVHWAccel {
*/
#define AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH (1 << 2)
/**
* Some hardware decoders (namely nvdec) can either output direct decoder
* surfaces, or make an on-device copy and return said copy.
* There is a hard limit on how many decoder surfaces there can be, and it
* cannot be accurately guessed ahead of time.
* For some processing chains, this can be okay, but others will run into the
* limit and in turn produce very confusing errors that require fine tuning of
* more or less obscure options by the user, or in extreme cases cannot be
* resolved at all without inserting an avfilter that forces a copy.
*
* Thus, the hwaccel will by default make a copy for safety and resilience.
* If a users really wants to minimize the amount of copies, they can set this
* flag and ensure their processing chain does not exhaust the surface pool.
*/
#define AV_HWACCEL_FLAG_UNSAFE_OUTPUT (1 << 3)
/**
* @}
*/

1
libavcodec/options_table.h
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@ -399,6 +399,7 @@ static const AVOption avcodec_options[] = {
{"ignore_level", "ignore level even if the codec level used is unknown or higher than the maximum supported level reported by the hardware driver", 0, AV_OPT_TYPE_CONST, { .i64 = AV_HWACCEL_FLAG_IGNORE_LEVEL }, INT_MIN, INT_MAX, V | D, "hwaccel_flags" },
{"allow_high_depth", "allow to output YUV pixel formats with a different chroma sampling than 4:2:0 and/or other than 8 bits per component", 0, AV_OPT_TYPE_CONST, {.i64 = AV_HWACCEL_FLAG_ALLOW_HIGH_DEPTH }, INT_MIN, INT_MAX, V | D, "hwaccel_flags"},
{"allow_profile_mismatch", "attempt to decode anyway if HW accelerated decoder's supported profiles do not exactly match the stream", 0, AV_OPT_TYPE_CONST, {.i64 = AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH }, INT_MIN, INT_MAX, V | D, "hwaccel_flags"},
{"unsafe_output", "allow potentially unsafe hwaccel frame output that might require special care to process successfully", 0, AV_OPT_TYPE_CONST, {.i64 = AV_HWACCEL_FLAG_UNSAFE_OUTPUT }, INT_MIN, INT_MAX, V | D, "hwaccel_flags"},
{"extra_hw_frames", "Number of extra hardware frames to allocate for the user", OFFSET(extra_hw_frames), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, V|D },
{"discard_damaged_percentage", "Percentage of damaged samples to discard a frame", OFFSET(discard_damaged_percentage), AV_OPT_TYPE_INT, {.i64 = 95 }, 0, 100, V|D },
{NULL},

4
libavcodec/version.h
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@ -29,8 +29,8 @@
#include "version_major.h"
#define LIBAVCODEC_VERSION_MINOR 54
#define LIBAVCODEC_VERSION_MICRO 101
#define LIBAVCODEC_VERSION_MINOR 55
#define LIBAVCODEC_VERSION_MICRO 100
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \