Some drivers are more strict about the size of the reference lists given (i.e. VAOn12 [1]). The next_prev list is used to handle multiple "L0" references in AV1 encode. Restrict the size of next_prev based on the value of ref_l0 when the GOP structure is initialized.
[1] https://github.com/intel/cartwheel-ffmpeg/issues/278 --- libavcodec/hw_base_encode.c | 7 +++++-- libavcodec/hw_base_encode.h | 4 ++++ 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/libavcodec/hw_base_encode.c b/libavcodec/hw_base_encode.c index 4d8bf4fe71..2478e08414 100644 --- a/libavcodec/hw_base_encode.c +++ b/libavcodec/hw_base_encode.c @@ -190,12 +190,12 @@ static void hw_base_encode_add_next_prev(FFHWBaseEncodeContext *ctx, return; } - if (ctx->nb_next_prev < MAX_PICTURE_REFERENCES) { + if (ctx->nb_next_prev < ctx->ref_l0) { ctx->next_prev[ctx->nb_next_prev++] = pic; ++pic->ref_count[0]; } else { --ctx->next_prev[0]->ref_count[0]; - for (i = 0; i < MAX_PICTURE_REFERENCES - 1; i++) + for (i = 0; i < ctx->ref_l0 - 1; i++) ctx->next_prev[i] = ctx->next_prev[i + 1]; ctx->next_prev[i] = pic; ++pic->ref_count[0]; @@ -662,6 +662,9 @@ int ff_hw_base_init_gop_structure(FFHWBaseEncodeContext *ctx, AVCodecContext *av uint32_t ref_l0, uint32_t ref_l1, int flags, int prediction_pre_only) { + ctx->ref_l0 = min(ref_l0, MAX_PICTURE_REFERENCES); + ctx->ref_l1 = min(ref_l1, MAX_PICTURE_REFERENCES); + if (flags & FF_HW_FLAG_INTRA_ONLY || avctx->gop_size <= 1) { av_log(avctx, AV_LOG_VERBOSE, "Using intra frames only.\n"); ctx->gop_size = 1; diff --git a/libavcodec/hw_base_encode.h b/libavcodec/hw_base_encode.h index e30b1e60ad..e768579722 100644 --- a/libavcodec/hw_base_encode.h +++ b/libavcodec/hw_base_encode.h @@ -193,6 +193,10 @@ typedef struct FFHWBaseEncodeContext { int end_of_stream; int p_to_gpb; + // The number of L0/L1 references supported by the driver. + int ref_l0; + int ref_l1; + // Whether the driver supports ROI at all. int roi_allowed; -- 2.47.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
