static int txd_decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; TXDContext * const s = avctx->priv_data; AVFrame *picture = data; AVFrame * const p = &s->picture; unsigned int version, w, h, d3d_format, depth, stride, mipmap_count, flags; unsigned int y, v; uint8_t *ptr; const uint8_t *cur = buf; const uint32_t *palette = (const uint32_t *)(cur + 88); uint32_t *pal; version = AV_RL32(cur); d3d_format = AV_RL32(cur+76); w = AV_RL16(cur+80); h = AV_RL16(cur+82); depth = AV_RL8 (cur+84); mipmap_count = AV_RL8 (cur+85); flags = AV_RL8 (cur+87); cur += 92; if (version < 8 || version > 9) { av_log(avctx, AV_LOG_ERROR, "texture data version %i is unsupported\n", version); return -1; } if (depth == 8) { avctx->pix_fmt = PIX_FMT_PAL8; cur += 1024; } else if (depth == 16 || depth == 32) avctx->pix_fmt = PIX_FMT_RGB32; else { av_log(avctx, AV_LOG_ERROR, "depth of %i is unsupported\n", depth); return -1; } if (p->data[0]) avctx->release_buffer(avctx, p); if (av_image_check_size(w, h, 0, avctx)) return -1; if (w != avctx->width || h != avctx->height) avcodec_set_dimensions(avctx, w, h); if (avctx->get_buffer(avctx, p) < 0) { av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); return -1; } p->pict_type = AV_PICTURE_TYPE_I; ptr = p->data[0]; stride = p->linesize[0]; if (depth == 8) { pal = (uint32_t *) p->data[1]; for (y=0; y<256; y++) { v = AV_RB32(palette+y); pal[y] = (v>>8) + (v<<24); } for (y=0; y<h; y++) { memcpy(ptr, cur, w); ptr += stride; cur += w; } } else if (depth == 16) { switch (d3d_format) { case 0: if (!(flags & 1)) goto unsupported; case FF_S3TC_DXT1: ff_decode_dxt1(cur, ptr, w, h, stride); break; case FF_S3TC_DXT3: ff_decode_dxt3(cur, ptr, w, h, stride); break; default: goto unsupported; } } else if (depth == 32) { switch (d3d_format) { case 0x15: case 0x16: for (y=0; y<h; y++) { memcpy(ptr, cur, w*4); ptr += stride; cur += w*4; } break; default: goto unsupported; } } for (; mipmap_count > 1; mipmap_count--) cur += AV_RL32(cur) + 4; *picture = s->picture; *data_size = sizeof(AVPicture); return cur - buf; unsupported: av_log(avctx, AV_LOG_ERROR, "unsupported d3d format (%08x)\n", d3d_format); return -1; }