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libavcodec/v4l2_buffers.c: set AVFrame interlaced flags

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Originally from:
669955c6cb

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
This commit is contained in:
Scott Theisen 2024-12-18 16:59:53 -05:00 committed by Zhao Zhili
parent 1b8cd00da6
commit 9da1d2e66a
1 changed files with 18 additions and 0 deletions
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18
libavcodec/v4l2_buffers.c
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@ -210,6 +210,23 @@ static enum AVColorTransferCharacteristic v4l2_get_color_trc(V4L2Buffer *buf)
return AVCOL_TRC_UNSPECIFIED;
}
static void v4l2_get_interlacing(AVFrame *frame, V4L2Buffer *buf)
{
enum v4l2_field field = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ?
buf->context->format.fmt.pix_mp.field :
buf->context->format.fmt.pix.field;
switch (field) {
case V4L2_FIELD_INTERLACED:
case V4L2_FIELD_INTERLACED_TB:
frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
/* fallthrough */
case V4L2_FIELD_INTERLACED_BT:
frame->flags |= AV_FRAME_FLAG_INTERLACED;
break;
}
}
static void v4l2_free_buffer(void *opaque, uint8_t *unused)
{
V4L2Buffer* avbuf = opaque;
@ -434,6 +451,7 @@ int ff_v4l2_buffer_buf_to_avframe(AVFrame *frame, V4L2Buffer *avbuf)
frame->color_trc = v4l2_get_color_trc(avbuf);
frame->pts = v4l2_get_pts(avbuf);
frame->pkt_dts = AV_NOPTS_VALUE;
v4l2_get_interlacing(frame, avbuf);
/* these values are updated also during re-init in v4l2_process_driver_event */
frame->height = avbuf->context->height;