1/* 2 * Vizrt Binary Image encoder 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21/** 22 * @file 23 * Vizrt Binary Image encoder 24 */ 25 26#include "avcodec.h" 27#include "bytestream.h" 28#include "codec_internal.h" 29#include "encode.h" 30#include "texturedsp.h" 31#include "vbn.h" 32 33#include "libavutil/imgutils.h" 34#include "libavutil/frame.h" 35#include "libavutil/opt.h" 36 37typedef struct VBNContext { 38 AVClass *class; 39 TextureDSPContext dxtc; 40 int format; 41 TextureDSPThreadContext enc; 42} VBNContext; 43 44static int vbn_encode(AVCodecContext *avctx, AVPacket *pkt, 45 const AVFrame *frame, int *got_packet) 46{ 47 VBNContext *ctx = avctx->priv_data; 48 PutByteContext pb0, *const pb = &pb0; 49 int ret; 50 ptrdiff_t linesize; 51 int64_t pkt_size; 52 53 ret = av_image_check_size2(frame->width, frame->height, INT_MAX, frame->format, 0, avctx); 54 if (ret < 0) 55 return ret; 56 57 if (ctx->format == VBN_FORMAT_DXT1 || ctx->format == VBN_FORMAT_DXT5) { 58 if (frame->width % TEXTURE_BLOCK_W || frame->height % TEXTURE_BLOCK_H) { 59 av_log(avctx, AV_LOG_ERROR, "Video size %dx%d is not multiple of 4\n", frame->width, frame->height); 60 return AVERROR(EINVAL); 61 } 62 if (frame->format != AV_PIX_FMT_RGBA) { 63 av_log(avctx, AV_LOG_ERROR, "DXT formats only support RGBA pixel format\n"); 64 return AVERROR(EINVAL); 65 } 66 ctx->enc.raw_ratio = 16; 67 ctx->enc.slice_count = av_clip(avctx->thread_count, 1, avctx->height / TEXTURE_BLOCK_H); 68 } 69 70 switch (ctx->format) { 71 case VBN_FORMAT_DXT1: 72 linesize = frame->width / 2; 73 ctx->enc.tex_funct = ctx->dxtc.dxt1_block; 74 ctx->enc.tex_ratio = 8; 75 break; 76 case VBN_FORMAT_DXT5: 77 linesize = frame->width; 78 ctx->enc.tex_funct = ctx->dxtc.dxt5_block; 79 ctx->enc.tex_ratio = 16; 80 break; 81 case VBN_FORMAT_RAW: 82 linesize = av_image_get_linesize(frame->format, frame->width, 0); 83 if (linesize < 0) 84 return linesize; 85 break; 86 default: 87 av_log(avctx, AV_LOG_ERROR, "Invalid format %02X\n", ctx->format); 88 return AVERROR(EINVAL); 89 } 90 91 pkt_size = VBN_HEADER_SIZE + linesize * frame->height; 92 if (pkt_size > INT_MAX) 93 return AVERROR(EINVAL); 94 95 if ((ret = ff_get_encode_buffer(avctx, pkt, pkt_size, 0)) < 0) 96 return ret; 97 98 memset(pkt->data, 0, VBN_HEADER_SIZE); 99 bytestream2_init_writer(pb, pkt->data, pkt_size); 100 bytestream2_put_le32u(pb, VBN_MAGIC); 101 bytestream2_put_le32u(pb, VBN_MAJOR); 102 bytestream2_put_le32u(pb, VBN_MINOR); 103 bytestream2_put_le32u(pb, frame->width); 104 bytestream2_put_le32u(pb, frame->height); 105 bytestream2_put_le32u(pb, frame->format == AV_PIX_FMT_RGBA ? 4 : 3); 106 bytestream2_put_le32u(pb, ctx->format); 107 bytestream2_put_le32u(pb, frame->format == AV_PIX_FMT_RGBA ? VBN_PIX_RGBA : VBN_PIX_RGB); 108 bytestream2_put_le32u(pb, 0); // mipmaps 109 bytestream2_put_le32u(pb, pkt_size - VBN_HEADER_SIZE); 110 bytestream2_seek_p(pb, 64, SEEK_SET); 111 bytestream2_put_le32u(pb, pkt_size - VBN_HEADER_SIZE); 112 113 if (ctx->format == VBN_FORMAT_DXT1 || ctx->format == VBN_FORMAT_DXT5) { 114 ctx->enc.frame_data.in = (frame->height - 1) * frame->linesize[0] + frame->data[0]; 115 ctx->enc.stride = -frame->linesize[0]; 116 ctx->enc.tex_data.out = pkt->data + VBN_HEADER_SIZE; 117 avctx->execute2(avctx, ff_texturedsp_compress_thread, &ctx->enc, NULL, ctx->enc.slice_count); 118 } else { 119 uint8_t *flipped = frame->data[0] + frame->linesize[0] * (frame->height - 1); 120 av_image_copy_plane(pkt->data + VBN_HEADER_SIZE, linesize, flipped, -frame->linesize[0], linesize, frame->height); 121 } 122 123 *got_packet = 1; 124 return 0; 125} 126 127static av_cold int vbn_init(AVCodecContext *avctx) 128{ 129 VBNContext *ctx = avctx->priv_data; 130 ff_texturedspenc_init(&ctx->dxtc); 131 return 0; 132} 133 134#define OFFSET(x) offsetof(VBNContext, x) 135#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM 136static const AVOption options[] = { 137 { "format", "Texture format", OFFSET(format), AV_OPT_TYPE_INT, { .i64 = VBN_FORMAT_DXT5 }, VBN_FORMAT_RAW, VBN_FORMAT_DXT5, FLAGS, "format" }, 138 { "raw", "RAW texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_RAW }, 0, 0, FLAGS, "format" }, 139 { "dxt1", "DXT1 texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_DXT1 }, 0, 0, FLAGS, "format" }, 140 { "dxt5", "DXT5 texture", 0, AV_OPT_TYPE_CONST, { .i64 = VBN_FORMAT_DXT5 }, 0, 0, FLAGS, "format" }, 141 { NULL }, 142}; 143 144static const AVClass vbnenc_class = { 145 .class_name = "VBN encoder", 146 .item_name = av_default_item_name, 147 .option = options, 148 .version = LIBAVUTIL_VERSION_INT, 149}; 150 151const FFCodec ff_vbn_encoder = { 152 .p.name = "vbn", 153 .p.long_name = NULL_IF_CONFIG_SMALL("Vizrt Binary Image"), 154 .p.type = AVMEDIA_TYPE_VIDEO, 155 .p.id = AV_CODEC_ID_VBN, 156 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS, 157 .p.priv_class = &vbnenc_class, 158 .init = vbn_init, 159 FF_CODEC_ENCODE_CB(vbn_encode), 160 .priv_data_size = sizeof(VBNContext), 161 .p.pix_fmts = (const enum AVPixelFormat[]) { 162 AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE, 163 }, 164 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | 165 FF_CODEC_CAP_INIT_CLEANUP, 166}; 167