ffmpeg / libavcodec / txd.c @ d36beb3f
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/*
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* Renderware TeXture Dictionary (.txd) image decoder
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* Copyright (c) 2007 Ivo van Poorten
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*
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* See also: http://wiki.multimedia.cx/index.php?title=TXD
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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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#include "libavutil/intreadwrite.h" |
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#include "libavcore/imgutils.h" |
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#include "avcodec.h" |
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#include "s3tc.h" |
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typedef struct TXDContext { |
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AVFrame picture; |
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} TXDContext; |
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static av_cold int txd_init(AVCodecContext *avctx) { |
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TXDContext *s = avctx->priv_data; |
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avcodec_get_frame_defaults(&s->picture); |
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avctx->coded_frame = &s->picture; |
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return 0; |
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} |
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static int txd_decode_frame(AVCodecContext *avctx, void *data, int *data_size, |
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AVPacket *avpkt) { |
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const uint8_t *buf = avpkt->data;
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TXDContext * const s = avctx->priv_data;
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AVFrame *picture = data; |
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AVFrame * const p = &s->picture;
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unsigned int version, w, h, d3d_format, depth, stride, mipmap_count, flags; |
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unsigned int y, v; |
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uint8_t *ptr; |
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const uint8_t *cur = buf;
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const uint32_t *palette = (const uint32_t *)(cur + 88); |
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uint32_t *pal; |
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version = AV_RL32(cur); |
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d3d_format = AV_RL32(cur+76);
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w = AV_RL16(cur+80);
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h = AV_RL16(cur+82);
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depth = AV_RL8 (cur+84);
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mipmap_count = AV_RL8 (cur+85);
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flags = AV_RL8 (cur+87);
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cur += 92;
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if (version < 8 || version > 9) { |
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av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n",
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version); |
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return -1; |
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} |
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if (depth == 8) { |
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avctx->pix_fmt = PIX_FMT_PAL8; |
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cur += 1024;
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} else if (depth == 16 || depth == 32) |
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avctx->pix_fmt = PIX_FMT_RGB32; |
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else {
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av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth);
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return -1; |
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} |
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if (p->data[0]) |
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avctx->release_buffer(avctx, p); |
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if (av_image_check_size(w, h, 0, avctx)) |
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return -1; |
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if (w != avctx->width || h != avctx->height)
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avcodec_set_dimensions(avctx, w, h); |
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if (avctx->get_buffer(avctx, p) < 0) { |
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av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
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return -1; |
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} |
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p->pict_type = FF_I_TYPE; |
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ptr = p->data[0];
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stride = p->linesize[0];
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if (depth == 8) { |
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pal = (uint32_t *) p->data[1];
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for (y=0; y<256; y++) { |
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v = AV_RB32(palette+y); |
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pal[y] = (v>>8) + (v<<24); |
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} |
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for (y=0; y<h; y++) { |
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memcpy(ptr, cur, w); |
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ptr += stride; |
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cur += w; |
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} |
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} else if (depth == 16) { |
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switch (d3d_format) {
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case 0: |
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if (!flags&1) goto unsupported; |
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case FF_S3TC_DXT1:
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ff_decode_dxt1(cur, ptr, w, h, stride); |
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break;
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case FF_S3TC_DXT3:
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ff_decode_dxt3(cur, ptr, w, h, stride); |
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break;
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default:
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goto unsupported;
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} |
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} else if (depth == 32) { |
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switch (d3d_format) {
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case 0x15: |
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case 0x16: |
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for (y=0; y<h; y++) { |
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memcpy(ptr, cur, w*4);
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ptr += stride; |
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cur += w*4;
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} |
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break;
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default:
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goto unsupported;
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} |
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} |
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for (; mipmap_count > 1; mipmap_count--) |
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cur += AV_RL32(cur) + 4;
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*picture = s->picture; |
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*data_size = sizeof(AVPicture);
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return cur - buf;
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unsupported:
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av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format);
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return -1; |
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} |
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static av_cold int txd_end(AVCodecContext *avctx) { |
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TXDContext *s = avctx->priv_data; |
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if (s->picture.data[0]) |
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avctx->release_buffer(avctx, &s->picture); |
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return 0; |
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} |
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AVCodec ff_txd_decoder = { |
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"txd",
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AVMEDIA_TYPE_VIDEO, |
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CODEC_ID_TXD, |
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sizeof(TXDContext),
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txd_init, |
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NULL,
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txd_end, |
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txd_decode_frame, |
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CODEC_CAP_DR1, |
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NULL,
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.long_name = NULL_IF_CONFIG_SMALL("Renderware TXD (TeXture Dictionary) image"),
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}; |