[FFmpeg-devel] [PATCH v1] avcodec/v210enc: add yuv420p/yuv420p10 input pixel format support

lance.lmwang at gmail.com lance.lmwang at gmail.com
Fri Sep 20 18:55:17 EEST 2019


From: Limin Wang <lance.lmwang at gmail.com>

Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
---
 libavcodec/v210_template.c | 20 ++++++++++++++++++++
 libavcodec/v210enc.c       |  8 +++++---
 2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/libavcodec/v210_template.c b/libavcodec/v210_template.c
index 9e1d9f9..083a9f1 100644
--- a/libavcodec/v210_template.c
+++ b/libavcodec/v210_template.c
@@ -43,11 +43,31 @@ static void RENAME(v210_enc)(AVCodecContext *avctx,
     const TYPE *y = (const TYPE *)pic->data[0];
     const TYPE *u = (const TYPE *)pic->data[1];
     const TYPE *v = (const TYPE *)pic->data[2];
+    const TYPE *u_even = u;
+    const TYPE *v_even = v;
     const int sample_size = 6 * s->RENAME(sample_factor);
     const int sample_w    = avctx->width / sample_size;
 
     for (h = 0; h < avctx->height; h++) {
         uint32_t val;
+
+        if (pic->format == AV_PIX_FMT_YUV420P10 ||
+            pic->format == AV_PIX_FMT_YUV420P) {
+            int mod = pic->interlaced_frame == 1 ? 4 : 2;
+            if (h % mod == 0) {
+                u_even = u;
+                v_even = v;
+            } else {
+                /* progressive chroma */
+                if (mod == 2) {
+                    u = u_even;
+                    v = v_even;
+                } else if (h % 4 == 2) {
+                    u = u_even;
+                    v = v_even;
+                }
+            }
+        }
         w = sample_w * sample_size;
         s->RENAME(pack_line)(y, u, v, dst, w);
 
diff --git a/libavcodec/v210enc.c b/libavcodec/v210enc.c
index 16e8810..2180737 100644
--- a/libavcodec/v210enc.c
+++ b/libavcodec/v210enc.c
@@ -131,9 +131,9 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     }
     dst = pkt->data;
 
-    if (pic->format == AV_PIX_FMT_YUV422P10)
+    if (pic->format == AV_PIX_FMT_YUV422P10 || pic->format == AV_PIX_FMT_YUV420P10)
         v210_enc_10(avctx, dst, pic);
-    else if(pic->format == AV_PIX_FMT_YUV422P)
+    else if(pic->format == AV_PIX_FMT_YUV422P || pic->format == AV_PIX_FMT_YUV420P)
         v210_enc_8(avctx, dst, pic);
 
     side_data = av_frame_get_side_data(pic, AV_FRAME_DATA_A53_CC);
@@ -165,5 +165,7 @@ AVCodec ff_v210_encoder = {
     .priv_data_size = sizeof(V210EncContext),
     .init           = encode_init,
     .encode2        = encode_frame,
-    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE },
+    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P,
+                                                    AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P,
+                                                    AV_PIX_FMT_NONE },
 };
-- 
2.6.4



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