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/*
* 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;
TextureDSPEncContext dxtc;
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 pb0, *const pb = &pb0;
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_le32u(pb, VBN_MAGIC);
bytestream2_put_le32u(pb, VBN_MAJOR);
bytestream2_put_le32u(pb, VBN_MINOR);
bytestream2_put_le32u(pb, frame->width);
bytestream2_put_le32u(pb, frame->height);
bytestream2_put_le32u(pb, frame->format == AV_PIX_FMT_RGBA ? 4 : 3);
bytestream2_put_le32u(pb, ctx->format);
bytestream2_put_le32u(pb, frame->format == AV_PIX_FMT_RGBA ? VBN_PIX_RGBA : VBN_PIX_RGB);
bytestream2_put_le32u(pb, 0); // mipmaps
bytestream2_put_le32u(pb, pkt_size - VBN_HEADER_SIZE);
bytestream2_seek_p(pb, 64, SEEK_SET);
bytestream2_put_le32u(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;
ctx->enc.width = avctx->width;
ctx->enc.height = avctx->height;
ff_texturedsp_exec_compress_threads(avctx, &ctx->enc);
} else {
const 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;
}
#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, .unit = "format" },
{ "raw", "RAW texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_RAW }, 0, 0, FLAGS, .unit = "format" },
{ "dxt1", "DXT1 texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_DXT1 }, 0, 0, FLAGS, .unit = "format" },
{ "dxt5", "DXT5 texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_DXT5 }, 0, 0, FLAGS, .unit = "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",
CODEC_LONG_NAME("Vizrt Binary Image"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_VBN,
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS |
AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
.p.priv_class = &vbnenc_class,
.init = vbn_init,
FF_CODEC_ENCODE_CB(vbn_encode),
.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_CLEANUP,
};
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