2022-03-22 01:29:29 +00:00
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/*
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* Vizrt Binary Image encoder
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Vizrt Binary Image encoder
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*/
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#include "avcodec.h"
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#include "bytestream.h"
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#include "codec_internal.h"
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#include "encode.h"
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#include "texturedsp.h"
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#include "vbn.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/frame.h"
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#include "libavutil/opt.h"
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typedef struct VBNContext {
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AVClass *class;
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TextureDSPContext dxtc;
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int format;
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TextureDSPThreadContext enc;
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} VBNContext;
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static int vbn_encode(AVCodecContext *avctx, AVPacket *pkt,
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const AVFrame *frame, int *got_packet)
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{
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VBNContext *ctx = avctx->priv_data;
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2022-04-12 17:17:08 +00:00
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PutByteContext pb0, *const pb = &pb0;
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2022-03-22 01:29:29 +00:00
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int ret;
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ptrdiff_t linesize;
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int64_t pkt_size;
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ret = av_image_check_size2(frame->width, frame->height, INT_MAX, frame->format, 0, avctx);
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if (ret < 0)
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return ret;
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if (ctx->format == VBN_FORMAT_DXT1 || ctx->format == VBN_FORMAT_DXT5) {
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if (frame->width % TEXTURE_BLOCK_W || frame->height % TEXTURE_BLOCK_H) {
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av_log(avctx, AV_LOG_ERROR, "Video size %dx%d is not multiple of 4\n", frame->width, frame->height);
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return AVERROR(EINVAL);
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}
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if (frame->format != AV_PIX_FMT_RGBA) {
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av_log(avctx, AV_LOG_ERROR, "DXT formats only support RGBA pixel format\n");
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return AVERROR(EINVAL);
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}
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ctx->enc.raw_ratio = 16;
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ctx->enc.slice_count = av_clip(avctx->thread_count, 1, avctx->height / TEXTURE_BLOCK_H);
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}
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switch (ctx->format) {
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case VBN_FORMAT_DXT1:
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linesize = frame->width / 2;
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ctx->enc.tex_funct = ctx->dxtc.dxt1_block;
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ctx->enc.tex_ratio = 8;
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break;
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case VBN_FORMAT_DXT5:
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linesize = frame->width;
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ctx->enc.tex_funct = ctx->dxtc.dxt5_block;
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ctx->enc.tex_ratio = 16;
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break;
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case VBN_FORMAT_RAW:
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linesize = av_image_get_linesize(frame->format, frame->width, 0);
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if (linesize < 0)
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return linesize;
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break;
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default:
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av_log(avctx, AV_LOG_ERROR, "Invalid format %02X\n", ctx->format);
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return AVERROR(EINVAL);
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}
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pkt_size = VBN_HEADER_SIZE + linesize * frame->height;
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if (pkt_size > INT_MAX)
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return AVERROR(EINVAL);
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if ((ret = ff_get_encode_buffer(avctx, pkt, pkt_size, 0)) < 0)
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return ret;
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memset(pkt->data, 0, VBN_HEADER_SIZE);
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bytestream2_init_writer(pb, pkt->data, pkt_size);
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bytestream2_put_le32(pb, VBN_MAGIC);
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bytestream2_put_le32(pb, VBN_MAJOR);
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bytestream2_put_le32(pb, VBN_MINOR);
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bytestream2_put_le32(pb, frame->width);
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bytestream2_put_le32(pb, frame->height);
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bytestream2_put_le32(pb, frame->format == AV_PIX_FMT_RGBA ? 4 : 3);
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bytestream2_put_le32(pb, ctx->format);
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bytestream2_put_le32(pb, frame->format == AV_PIX_FMT_RGBA ? VBN_PIX_RGBA : VBN_PIX_RGB);
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bytestream2_put_le32(pb, 0); // mipmaps
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bytestream2_put_le32(pb, pkt_size - VBN_HEADER_SIZE);
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bytestream2_seek_p(pb, 64, SEEK_SET);
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bytestream2_put_le32(pb, pkt_size - VBN_HEADER_SIZE);
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if (ctx->format == VBN_FORMAT_DXT1 || ctx->format == VBN_FORMAT_DXT5) {
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ctx->enc.frame_data.in = (frame->height - 1) * frame->linesize[0] + frame->data[0];
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ctx->enc.stride = -frame->linesize[0];
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ctx->enc.tex_data.out = pkt->data + VBN_HEADER_SIZE;
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avctx->execute2(avctx, ff_texturedsp_compress_thread, &ctx->enc, NULL, ctx->enc.slice_count);
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} else {
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uint8_t *flipped = frame->data[0] + frame->linesize[0] * (frame->height - 1);
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av_image_copy_plane(pkt->data + VBN_HEADER_SIZE, linesize, flipped, -frame->linesize[0], linesize, frame->height);
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}
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*got_packet = 1;
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return 0;
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}
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static av_cold int vbn_init(AVCodecContext *avctx)
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{
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VBNContext *ctx = avctx->priv_data;
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ff_texturedspenc_init(&ctx->dxtc);
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return 0;
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}
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#define OFFSET(x) offsetof(VBNContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "format", "Texture format", OFFSET(format), AV_OPT_TYPE_INT, { .i64 = VBN_FORMAT_DXT5 }, VBN_FORMAT_RAW, VBN_FORMAT_DXT5, FLAGS, "format" },
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{ "raw", "RAW texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_RAW }, 0, 0, FLAGS, "format" },
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{ "dxt1", "DXT1 texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_DXT1 }, 0, 0, FLAGS, "format" },
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{ "dxt5", "DXT5 texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_DXT5 }, 0, 0, FLAGS, "format" },
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{ NULL },
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};
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static const AVClass vbnenc_class = {
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.class_name = "VBN encoder",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const FFCodec ff_vbn_encoder = {
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.p.name = "vbn",
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.p.long_name = NULL_IF_CONFIG_SMALL("Vizrt Binary Image"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_VBN,
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.p.capabilities = AV_CODEC_CAP_SLICE_THREADS,
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.p.priv_class = &vbnenc_class,
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.init = vbn_init,
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FF_CODEC_ENCODE_CB(vbn_encode),
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.priv_data_size = sizeof(VBNContext),
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.p.pix_fmts = (const enum AVPixelFormat[]) {
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AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE,
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},
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
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FF_CODEC_CAP_INIT_CLEANUP,
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};
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