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avcodec/mpegvideo_dec: Don't memset twice 

This has been done for the luma plane of missing FLV1 and H263
references.
Also remove code duplication by reusing gray_frame(), which
has been renamed to color_frame() for this purpose.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-09-30 19:20:00 +02:00
parent 3ede6cc0f1
commit 06388250d9
1 changed files with 5 additions and 23 deletions
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28
libavcodec/mpegvideo_dec.c
View File

@ -245,12 +245,12 @@ static int alloc_picture(MpegEncContext *s, Picture *pic)
&s->linesize, &s->uvlinesize);
}
static void gray_frame(AVFrame *frame)
static void color_frame(AVFrame *frame, int luma)
{
int h_chroma_shift, v_chroma_shift;
for (int i = 0; i < frame->height; i++)
memset(frame->data[0] + frame->linesize[0] * i, 0x80, frame->width);
memset(frame->data[0] + frame->linesize[0] * i, luma, frame->width);
if (!frame->data[1])
return;
@ -365,9 +365,6 @@ FF_ENABLE_DEPRECATION_WARNINGS
if ((!s->last_picture_ptr || !s->last_picture_ptr->f->buf[0]) &&
(s->pict_type != AV_PICTURE_TYPE_I)) {
int h_chroma_shift, v_chroma_shift;
av_pix_fmt_get_chroma_sub_sample(s->avctx->pix_fmt,
&h_chroma_shift, &v_chroma_shift);
if (s->pict_type == AV_PICTURE_TYPE_B && s->next_picture_ptr && s->next_picture_ptr->f->buf[0])
av_log(avctx, AV_LOG_DEBUG,
"allocating dummy last picture for B frame\n");
@ -393,23 +390,8 @@ FF_ENABLE_DEPRECATION_WARNINGS
}
if (!avctx->hwaccel) {
for (int i = 0; i < avctx->height; i++)
memset(s->last_picture_ptr->f->data[0] + s->last_picture_ptr->f->linesize[0]*i,
0x80, avctx->width);
if (s->last_picture_ptr->f->data[2]) {
for (int i = 0; i < AV_CEIL_RSHIFT(avctx->height, v_chroma_shift); i++) {
memset(s->last_picture_ptr->f->data[1] + s->last_picture_ptr->f->linesize[1]*i,
0x80, AV_CEIL_RSHIFT(avctx->width, h_chroma_shift));
memset(s->last_picture_ptr->f->data[2] + s->last_picture_ptr->f->linesize[2]*i,
0x80, AV_CEIL_RSHIFT(avctx->width, h_chroma_shift));
}
}
if (s->codec_id == AV_CODEC_ID_FLV1 || s->codec_id == AV_CODEC_ID_H263) {
for (int i = 0; i < avctx->height; i++)
memset(s->last_picture_ptr->f->data[0] + s->last_picture_ptr->f->linesize[0] * i,
16, avctx->width);
}
int luma_val = s->codec_id == AV_CODEC_ID_FLV1 || s->codec_id == AV_CODEC_ID_H263 ? 16 : 0x80;
color_frame(s->last_picture_ptr->f, luma_val);
}
ff_thread_report_progress(&s->last_picture_ptr->tf, INT_MAX, 0);
@ -480,7 +462,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
}
if (s->avctx->debug & FF_DEBUG_NOMC)
gray_frame(s->current_picture_ptr->f);
color_frame(s->current_picture_ptr->f, 0x80);
return 0;
}