FFmpeg/libavcodec/tmv.c
Michael Niedermayer 444e9874a7 Merge commit 'def97856de6021965db86c25a732d78689bd6bb0'
* commit 'def97856de6021965db86c25a732d78689bd6bb0':
  lavc: AV-prefix all codec capabilities

Conflicts:
	cmdutils.c
	ffmpeg.c
	ffplay.c
	libavcodec/8svx.c
	libavcodec/aacenc.c
	libavcodec/ac3dec.c
	libavcodec/adpcm.c
	libavcodec/alac.c
	libavcodec/atrac3plusdec.c
	libavcodec/bink.c
	libavcodec/dnxhddec.c
	libavcodec/dvdec.c
	libavcodec/dvenc.c
	libavcodec/ffv1dec.c
	libavcodec/ffv1enc.c
	libavcodec/fic.c
	libavcodec/flacdec.c
	libavcodec/flacenc.c
	libavcodec/flvdec.c
	libavcodec/fraps.c
	libavcodec/frwu.c
	libavcodec/gifdec.c
	libavcodec/h261dec.c
	libavcodec/hevc.c
	libavcodec/iff.c
	libavcodec/imc.c
	libavcodec/libopenjpegdec.c
	libavcodec/libvo-aacenc.c
	libavcodec/libvorbisenc.c
	libavcodec/libvpxdec.c
	libavcodec/libvpxenc.c
	libavcodec/libx264.c
	libavcodec/mjpegbdec.c
	libavcodec/mjpegdec.c
	libavcodec/mpegaudiodec_float.c
	libavcodec/msmpeg4dec.c
	libavcodec/mxpegdec.c
	libavcodec/nvenc_h264.c
	libavcodec/nvenc_hevc.c
	libavcodec/pngdec.c
	libavcodec/qpeg.c
	libavcodec/ra288.c
	libavcodec/rv10.c
	libavcodec/s302m.c
	libavcodec/sp5xdec.c
	libavcodec/takdec.c
	libavcodec/tiff.c
	libavcodec/tta.c
	libavcodec/utils.c
	libavcodec/v210dec.c
	libavcodec/vp6.c
	libavcodec/vp9.c
	libavcodec/wavpack.c
	libavcodec/yop.c

Merged-by: Michael Niedermayer <michael@niedermayer.cc>
2015-07-27 22:50:18 +02:00

98 lines
2.8 KiB
C

/*
* 8088flex TMV video decoder
* Copyright (c) 2009 Daniel Verkamp <daniel at drv.nu>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* 8088flex TMV video decoder
* @author Daniel Verkamp
* @see http://www.oldskool.org/pc/8088_Corruption
*/
#include <string.h>
#include "avcodec.h"
#include "internal.h"
#include "libavutil/internal.h"
#include "libavutil/xga_font_data.h"
#include "cga_data.h"
static int tmv_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
AVFrame *frame = data;
const uint8_t *src = avpkt->data;
uint8_t *dst;
unsigned char_cols = avctx->width >> 3;
unsigned char_rows = avctx->height >> 3;
unsigned x, y, fg, bg, c;
int ret;
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
if (avpkt->size < 2*char_rows*char_cols) {
av_log(avctx, AV_LOG_ERROR,
"Input buffer too small, truncated sample?\n");
*got_frame = 0;
return AVERROR_INVALIDDATA;
}
frame->pict_type = AV_PICTURE_TYPE_I;
frame->key_frame = 1;
dst = frame->data[0];
frame->palette_has_changed = 1;
memcpy(frame->data[1], ff_cga_palette, 16 * 4);
memset(frame->data[1] + 16 * 4, 0, AVPALETTE_SIZE - 16 * 4);
for (y = 0; y < char_rows; y++) {
for (x = 0; x < char_cols; x++) {
c = *src++;
bg = *src >> 4;
fg = *src++ & 0xF;
ff_draw_pc_font(dst + x * 8, frame->linesize[0],
avpriv_cga_font, 8, c, fg, bg);
}
dst += frame->linesize[0] * 8;
}
*got_frame = 1;
return avpkt->size;
}
static av_cold int tmv_decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt = AV_PIX_FMT_PAL8;
return 0;
}
AVCodec ff_tmv_decoder = {
.name = "tmv",
.long_name = NULL_IF_CONFIG_SMALL("8088flex TMV"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_TMV,
.init = tmv_decode_init,
.decode = tmv_decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
};