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fftools/ffmpeg_enc: refactor setting encoding field_order

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Merge three blocks with slightly inconsistent checks into one, treating
encoder input as interlaced when either:
* at least one of ilme/ildct flags is set
* the first frame in the stream is marked as interlaced
* the user specified the -top option

Stop modifying the frame passed to enc_open().
This commit is contained in:
Anton Khirnov 2023-09-14 13:23:43 +02:00
parent 85e075587d
commit 74b643a51e
1 changed files with 6 additions and 17 deletions
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23
fftools/ffmpeg_enc.c
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@ -356,29 +356,18 @@ int enc_open(OutputStream *ost, AVFrame *frame)
enc_ctx->colorspace = frame->colorspace;
enc_ctx->chroma_sample_location = frame->chroma_location;
// Field order: autodetection
if (enc_ctx->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) &&
ost->top_field_first >= 0)
if (ost->top_field_first)
frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
else
frame->flags &= ~AV_FRAME_FLAG_TOP_FIELD_FIRST;
if (enc_ctx->flags & (AV_CODEC_FLAG_INTERLACED_DCT | AV_CODEC_FLAG_INTERLACED_ME) ||
(frame->flags & AV_FRAME_FLAG_INTERLACED) || ost->top_field_first >= 0) {
int top_field_first = ost->top_field_first >= 0 ?
ost->top_field_first : !!(frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST);
if (frame->flags & AV_FRAME_FLAG_INTERLACED) {
if (enc->id == AV_CODEC_ID_MJPEG)
enc_ctx->field_order = (frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) ? AV_FIELD_TT:AV_FIELD_BB;
enc_ctx->field_order = top_field_first ? AV_FIELD_TT : AV_FIELD_BB;
else
enc_ctx->field_order = (frame->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) ? AV_FIELD_TB:AV_FIELD_BT;
enc_ctx->field_order = top_field_first ? AV_FIELD_TB : AV_FIELD_BT;
} else
enc_ctx->field_order = AV_FIELD_PROGRESSIVE;
// Field order: override
if (ost->top_field_first == 0) {
enc_ctx->field_order = AV_FIELD_BB;
} else if (ost->top_field_first == 1) {
enc_ctx->field_order = AV_FIELD_TT;
}
break;
}
case AVMEDIA_TYPE_SUBTITLE: