avcodec/vbnenc: add VBN encoder

Signed-off-by: Marton Balint <cus@passwd.hu>

1 files changed, 173 insertions, 0 deletions

diff --git a/libavcodec/vbnenc.c b/libavcodec/vbnenc.c
new file mode 100644
index 0000000000..5c855bcd73
--- /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,
+    FF_CODEC_ENCODE_CB(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,
+};