[FFmpeg-devel] [PATCH v3 5/7] avcodec: suppport for bitpacked encode
lance.lmwang at gmail.com
lance.lmwang at gmail.com
Wed Nov 24 17:27:43 EET 2021
From: Limin Wang <lance.lmwang at gmail.com>
Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
---
Changelog | 1 +
libavcodec/Makefile | 1 +
libavcodec/allcodecs.c | 1 +
libavcodec/bitpacked_enc.c | 121 +++++++++++++++++++++++++++++++++++++++++++++
libavcodec/version.h | 2 +-
5 files changed, 125 insertions(+), 1 deletion(-)
create mode 100644 libavcodec/bitpacked_enc.c
diff --git a/Changelog b/Changelog
index 2035c27..a66231b4 100644
--- a/Changelog
+++ b/Changelog
@@ -32,6 +32,7 @@ version <next>:
- huesaturation video filter
- colorspectrum source video filter
- RTP packetizer for uncompressed video (RFC 4175)
+- bitpacked encoder
version 4.4:
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index fbb2b79..6be90cd 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_BITPACKED_DECODER) += bitpacked_dec.o
+OBJS-$(CONFIG_BITPACKED_ENCODER) += bitpacked_enc.o
OBJS-$(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 9ede09b..89d6526 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_bitpacked_decoder;
+extern const AVCodec ff_bitpacked_encoder;
extern const AVCodec ff_bmp_encoder;
extern const AVCodec ff_bmp_decoder;
extern const AVCodec ff_bmv_video_decoder;
diff --git a/libavcodec/bitpacked_enc.c b/libavcodec/bitpacked_enc.c
new file mode 100644
index 0000000..a8cad64
--- /dev/null
+++ b/libavcodec/bitpacked_enc.c
@@ -0,0 +1,121 @@
+/*
+ * bitpacked encoder
+ *
+ * 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"
+#include "libavutil/pixdesc.h"
+
+struct BitpackedContext {
+ int (*encode)(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame);
+};
+
+static int encode_yuv422p10(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame)
+{
+ const int buf_size = avctx->height * avctx->width * avctx->bits_per_coded_sample / 8;
+ int ret;
+ uint8_t *dst;
+ const uint16_t *y;
+ const uint16_t *u;
+ const uint16_t *v;
+ PutBitContext pb;
+ const int depth = avctx->bits_per_raw_sample;
+
+ 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, depth, av_clip_uintp2(*u++, depth));
+ put_bits(&pb, depth, av_clip_uintp2(*y++, depth));
+ put_bits(&pb, depth, av_clip_uintp2(*v++, depth));
+ put_bits(&pb, depth, av_clip_uintp2(*y++, depth));
+ }
+ }
+ flush_put_bits(&pb);
+
+ return 0;
+}
+
+
+static av_cold int encode_init(AVCodecContext *avctx)
+{
+ struct BitpackedContext *s = avctx->priv_data;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
+ const int depth = desc->comp[0].depth;
+
+ if (avctx->width & 1) {
+ av_log(avctx, AV_LOG_ERROR, "bitpacked needs even width\n");
+ return AVERROR(EINVAL);
+ }
+
+ avctx->bits_per_coded_sample = av_get_bits_per_pixel(desc);
+ avctx->bits_per_raw_sample = depth;
+ avctx->bit_rate = ff_guess_coded_bitrate(avctx);
+
+ if (avctx->pix_fmt == AV_PIX_FMT_YUV422P10)
+ s->encode = encode_yuv422p10;
+ else
+ return AVERROR(EINVAL);
+
+ return 0;
+}
+
+static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+ const AVFrame *frame, int *got_packet)
+{
+ struct BitpackedContext *s = avctx->priv_data;
+ int ret;
+
+ ret = s->encode(avctx, pkt, frame);
+ if (ret)
+ return ret;
+
+ *got_packet = 1;
+ return 0;
+}
+
+const AVCodec ff_bitpacked_encoder = {
+ .name = "bitpacked",
+ .long_name = NULL_IF_CONFIG_SMALL("Bitpacked"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_BITPACKED,
+ .priv_data_size = sizeof(struct BitpackedContext),
+ .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,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 4d30003..58e3322 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
#define LIBAVCODEC_VERSION_MAJOR 59
#define LIBAVCODEC_VERSION_MINOR 13
-#define LIBAVCODEC_VERSION_MICRO 100
+#define LIBAVCODEC_VERSION_MICRO 101
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \
--
1.8.3.1
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