[FFmpeg-devel] [PATCH 7/8] avcodec/vbnenc: add VBN encoder

[Marton Balint <cus@passwd.hu>]

Signed-off-by: Marton Balint <cus@passwd.hu>
---
 Changelog              |   2 +-
 configure              |   1 +
 libavcodec/Makefile    |   1 +
 libavcodec/allcodecs.c |   1 +
 libavcodec/vbnenc.c    | 173 +++++++++++++++++++++++++++++++++++++++++
 libavcodec/version.h   |   2 +-
 libavformat/img2enc.c  |   2 +-
 libavformat/version.h  |   4 +-
 8 files changed, 181 insertions(+), 5 deletions(-)
 create mode 100644 libavcodec/vbnenc.c

diff --git a/Changelog b/Changelog
index 7bad88dabc..c3fbba5221 100644
--- a/Changelog
+++ b/Changelog
@@ -6,7 +6,7 @@ version 5.1:
 - dropped obsolete XvMC hwaccel
 - pcm-bluray encoder
 - DFPWM audio encoder/decoder and raw muxer/demuxer
-- Vizrt Binary Image decoder
+- Vizrt Binary Image encoder/decoder
 
 
 version 5.0:
diff --git a/configure b/configure
index 90c99ff85e..9c8965852b 100755
--- a/configure
+++ b/configure
@@ -2960,6 +2960,7 @@ utvideo_decoder_select="bswapdsp llviddsp"
 utvideo_encoder_select="bswapdsp huffman llvidencdsp"
 vble_decoder_select="llviddsp"
 vbn_decoder_select="texturedsp"
+vbn_encoder_select="texturedspenc"
 vc1_decoder_select="blockdsp h263_decoder h264qpel intrax8 mpegvideodec vc1dsp"
 vc1image_decoder_select="vc1_decoder"
 vorbis_decoder_select="mdct"
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 90700085b8..90f46035d9 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -709,6 +709,7 @@ OBJS-$(CONFIG_V410_DECODER)            += v410dec.o
 OBJS-$(CONFIG_V410_ENCODER)            += v410enc.o
 OBJS-$(CONFIG_VB_DECODER)              += vb.o
 OBJS-$(CONFIG_VBN_DECODER)             += vbndec.o
+OBJS-$(CONFIG_VBN_ENCODER)             += vbnenc.o
 OBJS-$(CONFIG_VBLE_DECODER)            += vble.o
 OBJS-$(CONFIG_VC1_DECODER)             += vc1dec.o vc1_block.o vc1_loopfilter.o \
                                           vc1_mc.o vc1_pred.o vc1.o vc1data.o \
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index f0a7ea7fd4..585918da93 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -347,6 +347,7 @@ extern const FFCodec ff_v408_decoder;
 extern const FFCodec ff_v410_encoder;
 extern const FFCodec ff_v410_decoder;
 extern const FFCodec ff_vb_decoder;
+extern const FFCodec ff_vbn_encoder;
 extern const FFCodec ff_vbn_decoder;
 extern const FFCodec ff_vble_decoder;
 extern const FFCodec ff_vc1_decoder;
diff --git a/libavcodec/vbnenc.c b/libavcodec/vbnenc.c
new file mode 100644
index 0000000000..51f618c7d9
--- /dev/null
+++ b/libavcodec/vbnenc.c
@@ -0,0 +1,173 @@
+/*
+ * Vizrt Binary Image encoder
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * Vizrt Binary Image encoder
+ */
+
+#include "avcodec.h"
+#include "bytestream.h"
+#include "codec_internal.h"
+#include "encode.h"
+#include "texturedsp.h"
+#include "vbn.h"
+
+#include "libavutil/imgutils.h"
+#include "libavutil/frame.h"
+#include "libavutil/opt.h"
+
+typedef struct VBNContext {
+    AVClass *class;
+    TextureDSPContext dxtc;
+    PutByteContext pb;
+    int format;
+    TextureDSPThreadContext enc;
+} VBNContext;
+
+static int vbn_encode(AVCodecContext *avctx, AVPacket *pkt,
+                      const AVFrame *frame, int *got_packet)
+{
+    VBNContext *ctx = avctx->priv_data;
+    PutByteContext *pb = &ctx->pb;
+    int ret;
+    ptrdiff_t linesize;
+    int64_t pkt_size;
+
+    ret = av_image_check_size2(frame->width, frame->height, INT_MAX, frame->format, 0, avctx);
+    if (ret < 0)
+        return ret;
+
+    if (ctx->format == VBN_FORMAT_DXT1 || ctx->format == VBN_FORMAT_DXT5) {
+        if (frame->width % TEXTURE_BLOCK_W || frame->height % TEXTURE_BLOCK_H) {
+            av_log(avctx, AV_LOG_ERROR, "Video size %dx%d is not multiple of 4\n", frame->width, frame->height);
+            return AVERROR(EINVAL);
+        }
+        if (frame->format != AV_PIX_FMT_RGBA) {
+            av_log(avctx, AV_LOG_ERROR, "DXT formats only support RGBA pixel format\n");
+            return AVERROR(EINVAL);
+        }
+        ctx->enc.raw_ratio = 16;
+        ctx->enc.slice_count = av_clip(avctx->thread_count, 1, avctx->height / TEXTURE_BLOCK_H);
+    }
+
+    switch (ctx->format) {
+    case VBN_FORMAT_DXT1:
+        linesize = frame->width / 2;
+        ctx->enc.tex_funct = ctx->dxtc.dxt1_block;
+        ctx->enc.tex_ratio = 8;
+        break;
+    case VBN_FORMAT_DXT5:
+        linesize = frame->width;
+        ctx->enc.tex_funct = ctx->dxtc.dxt5_block;
+        ctx->enc.tex_ratio = 16;
+        break;
+    case VBN_FORMAT_RAW:
+        linesize = av_image_get_linesize(frame->format, frame->width, 0);
+        if (linesize < 0)
+            return linesize;
+        break;
+    default:
+        av_log(avctx, AV_LOG_ERROR, "Invalid format %02X\n", ctx->format);
+        return AVERROR(EINVAL);
+    }
+
+    pkt_size = VBN_HEADER_SIZE + linesize * frame->height;
+    if (pkt_size > INT_MAX)
+        return AVERROR(EINVAL);
+
+    if ((ret = ff_get_encode_buffer(avctx, pkt, pkt_size, 0)) < 0)
+        return ret;
+
+    memset(pkt->data, 0, VBN_HEADER_SIZE);
+    bytestream2_init_writer(pb, pkt->data, pkt_size);
+    bytestream2_put_le32(pb, VBN_MAGIC);
+    bytestream2_put_le32(pb, VBN_MAJOR);
+    bytestream2_put_le32(pb, VBN_MINOR);
+    bytestream2_put_le32(pb, frame->width);
+    bytestream2_put_le32(pb, frame->height);
+    bytestream2_put_le32(pb, frame->format == AV_PIX_FMT_RGBA ? 4 : 3);
+    bytestream2_put_le32(pb, ctx->format);
+    bytestream2_put_le32(pb, frame->format == AV_PIX_FMT_RGBA ? VBN_PIX_RGBA : VBN_PIX_RGB);
+    bytestream2_put_le32(pb, 0); // mipmaps
+    bytestream2_put_le32(pb, pkt_size - VBN_HEADER_SIZE);
+    bytestream2_seek_p(pb, 64, SEEK_SET);
+    bytestream2_put_le32(pb, pkt_size - VBN_HEADER_SIZE);
+
+    if (ctx->format == VBN_FORMAT_DXT1 || ctx->format == VBN_FORMAT_DXT5) {
+        ctx->enc.frame_data.in = (frame->height - 1) * frame->linesize[0] + frame->data[0];
+        ctx->enc.stride = -frame->linesize[0];
+        ctx->enc.tex_data.out = pkt->data + VBN_HEADER_SIZE;
+        avctx->execute2(avctx, ff_texturedsp_compress_thread, &ctx->enc, NULL, ctx->enc.slice_count);
+    } else {
+        uint8_t *flipped = frame->data[0] + frame->linesize[0] * (frame->height - 1);
+        av_image_copy_plane(pkt->data + VBN_HEADER_SIZE, linesize, flipped, -frame->linesize[0], linesize, frame->height);
+    }
+
+    *got_packet = 1;
+    return 0;
+}
+
+static av_cold int vbn_init(AVCodecContext *avctx)
+{
+    VBNContext *ctx = avctx->priv_data;
+    ff_texturedspenc_init(&ctx->dxtc);
+    return 0;
+}
+
+static av_cold int vbn_close(AVCodecContext *avctx)
+{
+    return 0;
+}
+
+#define OFFSET(x) offsetof(VBNContext, x)
+#define FLAGS     AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "format",      "Texture format", OFFSET(format), AV_OPT_TYPE_INT,   { .i64 = VBN_FORMAT_DXT5 }, VBN_FORMAT_RAW, VBN_FORMAT_DXT5, FLAGS, "format" },
+        { "raw",     "RAW texture",                 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_RAW  },              0,               0, FLAGS, "format" },
+        { "dxt1",    "DXT1 texture",                0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_DXT1 },              0,               0, FLAGS, "format" },
+        { "dxt5",    "DXT5 texture",                0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_DXT5 },              0,               0, FLAGS, "format" },
+    { NULL },
+};
+
+static const AVClass vbnenc_class = {
+    .class_name = "VBN encoder",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+const FFCodec ff_vbn_encoder = {
+    .p.name         = "vbn",
+    .p.long_name    = NULL_IF_CONFIG_SMALL("Vizrt Binary Image"),
+    .p.type         = AVMEDIA_TYPE_VIDEO,
+    .p.id           = AV_CODEC_ID_VBN,
+    .p.capabilities = AV_CODEC_CAP_SLICE_THREADS,
+    .p.priv_class   = &vbnenc_class,
+    .init           = vbn_init,
+    .encode2        = vbn_encode,
+    .close          = vbn_close,
+    .priv_data_size = sizeof(VBNContext),
+    .p.pix_fmts     = (const enum AVPixelFormat[]) {
+        AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE,
+    },
+    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE |
+                      FF_CODEC_CAP_INIT_CLEANUP,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index a744e7469f..26ee41eb1f 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
 
 #include "version_major.h"
 
-#define LIBAVCODEC_VERSION_MINOR  25
+#define LIBAVCODEC_VERSION_MINOR  26
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
diff --git a/libavformat/img2enc.c b/libavformat/img2enc.c
index 9b3b8741c8..ae351963d9 100644
--- a/libavformat/img2enc.c
+++ b/libavformat/img2enc.c
@@ -265,7 +265,7 @@ const AVOutputFormat ff_image2_muxer = {
     .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
     .extensions     = "bmp,dpx,exr,jls,jpeg,jpg,ljpg,pam,pbm,pcx,pfm,pgm,pgmyuv,png,"
                       "ppm,sgi,tga,tif,tiff,jp2,j2c,j2k,xwd,sun,ras,rs,im1,im8,im24,"
-                      "sunras,xbm,xface,pix,y",
+                      "sunras,vbn,xbm,xface,pix,y",
     .priv_data_size = sizeof(VideoMuxData),
     .video_codec    = AV_CODEC_ID_MJPEG,
     .write_header   = write_header,
diff --git a/libavformat/version.h b/libavformat/version.h
index f4a26c2870..683184d5da 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -31,8 +31,8 @@
 
 #include "version_major.h"
 
-#define LIBAVFORMAT_VERSION_MINOR  20
-#define LIBAVFORMAT_VERSION_MICRO 101
+#define LIBAVFORMAT_VERSION_MINOR  21
+#define LIBAVFORMAT_VERSION_MICRO 100
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \
-- 
2.31.1

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