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avcodec/mpegvideo_enc: Factor setting length of B frame chain out

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It already avoids a goto and will be useful in the future
to be able to specify each functions tasks and obligations.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-10-09 00:44:58 +02:00
parent 17501b2267
commit 17b5fc2e51
1 changed files with 25 additions and 8 deletions
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33
libavcodec/mpegvideo_enc.c
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@ -1472,13 +1472,15 @@ fail:
return best_b_count;
}
static int select_input_picture(MpegEncContext *s)
/**
* Determines whether an input picture is discarded or not
* and if not determines the length of the next chain of B frames
* and puts these pictures (including the P frame) into
* reordered_input_picture.
*/
static int set_bframe_chain_length(MpegEncContext *s)
{
int i, ret;
for (int i = 1; i <= MAX_B_FRAMES; i++)
s->reordered_input_picture[i - 1] = s->reordered_input_picture[i];
s->reordered_input_picture[MAX_B_FRAMES] = NULL;
int i;
/* set next picture type & ordering */
if (!s->reordered_input_picture[0] && s->input_picture[0]) {
@ -1491,7 +1493,7 @@ static int select_input_picture(MpegEncContext *s)
ff_vbv_update(s, 0);
goto no_output_pic;
return 0;
}
}
@ -1598,7 +1600,22 @@ static int select_input_picture(MpegEncContext *s)
}
}
}
no_output_pic:
return 0;
}
static int select_input_picture(MpegEncContext *s)
{
int ret;
for (int i = 1; i <= MAX_B_FRAMES; i++)
s->reordered_input_picture[i - 1] = s->reordered_input_picture[i];
s->reordered_input_picture[MAX_B_FRAMES] = NULL;
ret = set_bframe_chain_length(s);
if (ret < 0)
return ret;
av_frame_unref(s->new_pic);
if (s->reordered_input_picture[0]) {