From: Limin Wang <lance.lmw...@gmail.com>
Signed-off-by: Limin Wang <lance.lmw...@gmail.com>
---
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/s210enc.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 92 insertions(+)
create mode 100644 libavcodec/s210enc.c
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 1d75cfe..69734ca 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -244,6 +244,7 @@ OBJS-$(CONFIG_BINKAUDIO_DCT_DECODER) += binkaudio.o
OBJS-$(CONFIG_BINKAUDIO_RDFT_DECODER) += binkaudio.o
OBJS-$(CONFIG_BINTEXT_DECODER) += bintext.o cga_data.o
OBJS-$(CONFIG_S210_DECODER) += s210dec.o
+OBJS-$(CONFIG_S210_ENCODER) += s210enc.o
OBJS-$(CONFIG_BMP_DECODER) += bmp.o msrledec.o
OBJS-$(CONFIG_BMP_ENCODER) += bmpenc.o
OBJS-$(CONFIG_BMV_AUDIO_DECODER) += bmvaudio.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index c461798..77f5ed4 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -65,6 +65,7 @@ extern const AVCodec ff_bethsoftvid_decoder;
extern const AVCodec ff_bfi_decoder;
extern const AVCodec ff_bink_decoder;
extern const AVCodec ff_s210_decoder;
+extern const AVCodec ff_s210_encoder;
extern const AVCodec ff_bmp_encoder;
extern const AVCodec ff_bmp_decoder;
extern const AVCodec ff_bmv_video_decoder;
diff --git a/libavcodec/s210enc.c b/libavcodec/s210enc.c
new file mode 100644
index 0000000..c24f466
--- /dev/null
+++ b/libavcodec/s210enc.c
@@ -0,0 +1,90 @@
+/*
+ * S210 decoder
+ *
+ * Copyright (c) 2021 Limin Wang
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avcodec.h"
+#include "encode.h"
+#include "internal.h"
+#include "put_bits.h"
+
+static av_cold int encode_init(AVCodecContext *avctx)
+{
+ if (avctx->width & 1) {
+ av_log(avctx, AV_LOG_ERROR, "s210 needs even width\n");
+ return AVERROR(EINVAL);
+ }
+
+ avctx->bits_per_coded_sample = 20;
+ avctx->bit_rate = ff_guess_coded_bitrate(avctx);
+
+ return 0;
+}
+
+static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+ const AVFrame *frame, int *got_packet)
+{
+ const int buf_size = avctx->height * avctx->width * 20 / 8;
+ int ret;
+ uint8_t *dst;
+ const uint16_t *y;
+ const uint16_t *u;
+ const uint16_t *v;
+ PutBitContext pb;
+
+ ret = ff_get_encode_buffer(avctx, pkt, buf_size, 0);
+ if (ret < 0) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet.\n");
+ return ret;
+ }
+ dst = pkt->data;
+
+ init_put_bits(&pb, dst, buf_size);
+
+ for (int i = 0; i < avctx->height; i++) {
+ y = (uint16_t*)(frame->data[0] + i * frame->linesize[0]);
+ u = (uint16_t*)(frame->data[1] + i * frame->linesize[1]);
+ v = (uint16_t*)(frame->data[2] + i * frame->linesize[2]);
+
+ for (int j = 0; j < avctx->width; j += 2) {
+ /* u, y0, v, y1 */
+ put_bits(&pb, 10, av_clip_uintp2(*u++, 10));
+ put_bits(&pb, 10, av_clip_uintp2(*y++, 10));
+ put_bits(&pb, 10, av_clip_uintp2(*v++, 10));
+ put_bits(&pb, 10, av_clip_uintp2(*y++, 10));
+ }
+ }
+ flush_put_bits(&pb);
+
+ *got_packet = 1;
+ return 0;
+}
+
+const AVCodec ff_s210_encoder = {
+ .name = "s210",
+ .long_name = NULL_IF_CONFIG_SMALL("10-bit 4:2:2 packed"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_S210,
+ .capabilities = AV_CODEC_CAP_DR1,
+ .init = encode_init,
+ .encode2 = encode_frame,
+ .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV422P10,
AV_PIX_FMT_NONE },
+ .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
+};
--
1.8.3.1
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