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https://github.com/FFmpeg/FFmpeg.git
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XBM decoder
Signed-off-by: Paul B Mahol <onemda@gmail.com> Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
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1cd8510912
commit
a0340dfbd7
@ -15,7 +15,7 @@ version next:
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- libutvideo encoder wrapper (--enable-libutvideo)
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- libutvideo encoder wrapper (--enable-libutvideo)
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- swapuv filter
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- swapuv filter
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- bbox filter
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- bbox filter
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- XBM encoder
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- XBM encoder and decoder
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- RealAudio Lossless decoder
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- RealAudio Lossless decoder
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- ZeroCodec decoder
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- ZeroCodec decoder
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- tile video filter
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- tile video filter
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@ -403,7 +403,7 @@ following image formats are supported:
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@tab YUV, JPEG and some extension is not supported yet.
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@tab YUV, JPEG and some extension is not supported yet.
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@item Truevision Targa @tab X @tab X
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@item Truevision Targa @tab X @tab X
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@tab Targa (.TGA) image format
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@tab Targa (.TGA) image format
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@item XBM @tab X @tab
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@item XBM @tab X @tab X
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@tab X BitMap image format
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@tab X BitMap image format
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@item XWD @tab X @tab X
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@item XWD @tab X @tab X
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@tab X Window Dump image format
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@tab X Window Dump image format
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@ -486,6 +486,7 @@ OBJS-$(CONFIG_XAN_DPCM_DECODER) += dpcm.o
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OBJS-$(CONFIG_XAN_WC3_DECODER) += xan.o
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OBJS-$(CONFIG_XAN_WC3_DECODER) += xan.o
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OBJS-$(CONFIG_XAN_WC4_DECODER) += xxan.o
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OBJS-$(CONFIG_XAN_WC4_DECODER) += xxan.o
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OBJS-$(CONFIG_XBIN_DECODER) += bintext.o cga_data.o
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OBJS-$(CONFIG_XBIN_DECODER) += bintext.o cga_data.o
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OBJS-$(CONFIG_XBM_DECODER) += xbmdec.o
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OBJS-$(CONFIG_XBM_ENCODER) += xbmenc.o
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OBJS-$(CONFIG_XBM_ENCODER) += xbmenc.o
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OBJS-$(CONFIG_XL_DECODER) += xl.o
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OBJS-$(CONFIG_XL_DECODER) += xl.o
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OBJS-$(CONFIG_XSUB_DECODER) += xsubdec.o
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OBJS-$(CONFIG_XSUB_DECODER) += xsubdec.o
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@ -249,7 +249,7 @@ void avcodec_register_all(void)
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REGISTER_DECODER (WNV1, wnv1);
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REGISTER_DECODER (WNV1, wnv1);
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REGISTER_DECODER (XAN_WC3, xan_wc3);
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REGISTER_DECODER (XAN_WC3, xan_wc3);
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REGISTER_DECODER (XAN_WC4, xan_wc4);
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REGISTER_DECODER (XAN_WC4, xan_wc4);
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REGISTER_ENCODER (XBM, xbm);
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REGISTER_ENCDEC (XBM, xbm);
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REGISTER_DECODER (XL, xl);
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REGISTER_DECODER (XL, xl);
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REGISTER_ENCDEC (XWD, xwd);
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REGISTER_ENCDEC (XWD, xwd);
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REGISTER_ENCDEC (Y41P, y41p);
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REGISTER_ENCDEC (Y41P, y41p);
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130
libavcodec/xbmdec.c
Normal file
130
libavcodec/xbmdec.c
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@ -0,0 +1,130 @@
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/*
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* XBM image format
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*
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* Copyright (c) 2012 Paul B Mahol
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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 "avcodec.h"
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#include "internal.h"
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static av_cold int xbm_decode_init(AVCodecContext *avctx)
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{
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avctx->coded_frame = avcodec_alloc_frame();
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if (!avctx->coded_frame)
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return AVERROR(ENOMEM);
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return 0;
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}
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static int convert(uint8_t x)
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{
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if (x >= 'a')
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x -= 87;
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else if (x >= 'A')
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x -= 55;
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else
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x -= '0';
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return x;
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}
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static int xbm_decode_frame(AVCodecContext *avctx, void *data,
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int *data_size, AVPacket *avpkt)
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{
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AVFrame *p = avctx->coded_frame;
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const uint8_t *end, *ptr = avpkt->data;
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uint8_t *dst;
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int ret, linesize, i, j;
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end = avpkt->data + avpkt->size;
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while (!avctx->width || !avctx->height) {
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char name[256];
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int number, len;
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ptr += strcspn(ptr, "#");
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if (sscanf(ptr, "#define %256s %u", name, &number) != 2)
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return AVERROR_INVALIDDATA;
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len = strlen(name);
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if ((len > 6) && !avctx->height && !memcmp(name + len - 7, "_height", 7)) {
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avctx->height = number;
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} else if ((len > 5) && !avctx->width && !memcmp(name + len - 6, "_width", 6)) {
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avctx->width = number;
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} else {
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return AVERROR_INVALIDDATA;
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}
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ptr += strcspn(ptr, "\n\r") + 1;
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}
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avctx->pix_fmt = PIX_FMT_MONOWHITE;
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if (p->data[0])
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avctx->release_buffer(avctx, p);
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p->reference = 0;
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if ((ret = avctx->get_buffer(avctx, p)) < 0)
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return ret;
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linesize = (avctx->width + 7) / 8;
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for (i = 0; i < avctx->height; i++) {
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dst = p->data[0] + i * p->linesize[0];
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for (j = 0; j < linesize; j++) {
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uint8_t val;
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ptr += strcspn(ptr, "x") + 1;
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if (ptr < end && isxdigit(*ptr)) {
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val = convert(*ptr);
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ptr++;
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if (isxdigit(*ptr))
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val = (val << 4) + convert(*ptr);
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*dst++ = av_reverse[val];
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} else {
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return AVERROR_INVALIDDATA;
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}
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}
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}
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p->key_frame = 1;
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p->pict_type = AV_PICTURE_TYPE_I;
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*data_size = sizeof(AVFrame);
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*(AVFrame *)data = *p;
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return avpkt->size;
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}
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static av_cold int xbm_decode_close(AVCodecContext *avctx)
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{
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if (avctx->coded_frame->data[0])
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avctx->release_buffer(avctx, avctx->coded_frame);
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av_freep(&avctx->coded_frame);
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return 0;
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}
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AVCodec ff_xbm_decoder = {
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.name = "xbm",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = CODEC_ID_XBM,
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.init = xbm_decode_init,
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.close = xbm_decode_close,
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.decode = xbm_decode_frame,
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.capabilities = CODEC_CAP_DR1,
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.long_name = NULL_IF_CONFIG_SMALL("XBM (X BitMap) image"),
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};
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