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Code Issues Releases Activity

h264: avoid pointless copying of ref lists

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ref_list is constructed from other fields per slice when needed, so do
not copy it for both frame and slice threading.
default_ref_list is constructed per frame and still needs to be copied
to per-slice contexts for slice threading, but a copy is not needed for
frame threading.
This commit is contained in:
Anton Khirnov 2013-01-17 12:25:31 +01:00
parent b90632d596
commit 940b8b5861
2 changed files with 2 additions and 3 deletions
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3
libavcodec/h264.c
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@ -1253,7 +1253,7 @@ static int decode_update_thread_context(AVCodecContext *dst,
// reference lists
copy_fields(h, h1, ref_count, list_count);
copy_fields(h, h1, ref_list, intra_gb);
copy_fields(h, h1, ref2frm, intra_gb);
copy_fields(h, h1, short_ref, cabac_init_idc);
copy_picture_range(h->short_ref, h1->short_ref, 32, s, s1);
@ -2369,7 +2369,6 @@ static int clone_slice(H264Context *dst, H264Context *src)
memcpy(dst->short_ref, src->short_ref, sizeof(dst->short_ref));
memcpy(dst->long_ref, src->long_ref, sizeof(dst->long_ref));
memcpy(dst->default_ref_list, src->default_ref_list, sizeof(dst->default_ref_list));
memcpy(dst->ref_list, src->ref_list, sizeof(dst->ref_list));
memcpy(dst->dequant4_coeff, src->dequant4_coeff, sizeof(src->dequant4_coeff));
memcpy(dst->dequant8_coeff, src->dequant8_coeff, sizeof(src->dequant8_coeff));

2
libavcodec/h264.h
View File

@ -481,9 +481,9 @@ typedef struct H264Context {
int redundant_pic_count;
Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
Picture *short_ref[32];
Picture *long_ref[32];
Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
Picture *delayed_pic[MAX_DELAYED_PIC_COUNT + 2]; // FIXME size?
int last_pocs[MAX_DELAYED_PIC_COUNT];
Picture *next_output_pic;