This patch is an alternative to the patch "avcodec: add
avcodec_reset_hw_frames_parameters():
On Fri, Nov 29, 2024, at 09:34, Thomas Guillem via ffmpeg-devel wrote:
> avcodec_get_hw_frames_parameters(), called by the user from get_format,
> is allocating ctx->internal->hwaccel_priv_data. But the hardware
> decoding setup may fail on the user side and it may fallback to software
> decoding. In that case, ctx->internal->hwaccel_priv_data is still
> allocated but not used anymore.
> ---
> libavcodec/pthread_frame.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/libavcodec/pthread_frame.c b/libavcodec/pthread_frame.c
> index 1b1b96623f..a4474e4216 100644
> --- a/libavcodec/pthread_frame.c
> +++ b/libavcodec/pthread_frame.c
> @@ -49,6 +49,7 @@
> #include "libavutil/mem.h"
> #include "libavutil/opt.h"
> #include "libavutil/thread.h"
> +#include "libavutil/pixdesc.h"
>
> enum {
> /// Set when the thread is awaiting a packet.
> @@ -413,6 +414,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
> if (codec->update_thread_context_for_user)
> err = codec->update_thread_context_for_user(dst, src);
> } else {
> + const AVPixFmtDescriptor *desc;
> const PerThreadContext *p_src = src->internal->thread_ctx;
> PerThreadContext *p_dst = dst->internal->thread_ctx;
>
> @@ -423,8 +425,9 @@ FF_ENABLE_DEPRECATION_WARNINGS
> }
>
> // reset dst hwaccel state if needed
> - av_assert0(p_dst->hwaccel_threadsafe ||
> - (!dst->hwaccel &&
> !dst->internal->hwaccel_priv_data));
> + desc = av_pix_fmt_desc_get(dst->pix_fmt);
> + av_assert0(p_dst->hwaccel_threadsafe || desc == NULL ||
> + (!dst->hwaccel && (desc->flags &
> AV_PIX_FMT_FLAG_HWACCEL) == 0));
> if (p_dst->hwaccel_threadsafe &&
> (!p_src->hwaccel_threadsafe || dst->hwaccel !=
> src->hwaccel)) {
> ff_hwaccel_uninit(dst);
> --
> 2.45.2
>
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