Commit a1fd2bc3 authored by Daniel Verkamp's avatar Daniel Verkamp Committed by Stefano Sabatini
Browse files

Add 8088flex TMV video decoder.

Patch by Daniel Verkamp name at drv ... nu.

Originally committed as revision 18765 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 89cb5cd2
......@@ -221,6 +221,7 @@ OBJS-$(CONFIG_THP_DECODER) += mjpegdec.o mjpeg.o
OBJS-$(CONFIG_TIERTEXSEQVIDEO_DECODER) += tiertexseqv.o
OBJS-$(CONFIG_TIFF_DECODER) += tiff.o lzw.o faxcompr.o
OBJS-$(CONFIG_TIFF_ENCODER) += tiffenc.o rle.o lzwenc.o
OBJS-$(CONFIG_TMV_DECODER) += tmv.o cga_data.o
OBJS-$(CONFIG_TRUEHD_DECODER) += mlpdec.o mlp_parser.o mlp.o mlpdsp.o
OBJS-$(CONFIG_TRUEMOTION1_DECODER) += truemotion1.o
OBJS-$(CONFIG_TRUEMOTION2_DECODER) += truemotion2.o
......
......@@ -162,6 +162,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (THP, thp);
REGISTER_DECODER (TIERTEXSEQVIDEO, tiertexseqvideo);
REGISTER_ENCDEC (TIFF, tiff);
REGISTER_DECODER (TMV, tmv);
REGISTER_DECODER (TRUEMOTION1, truemotion1);
REGISTER_DECODER (TRUEMOTION2, truemotion2);
REGISTER_DECODER (TSCC, tscc);
......
......@@ -194,6 +194,7 @@ enum CodecID {
CODEC_ID_AURA,
CODEC_ID_AURA2,
CODEC_ID_V210X,
CODEC_ID_TMV,
/* various PCM "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
......
/*
* 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
*/
/**
* 8088flex TMV video decoder
* @file libavcodec/tmv.c
* @author Daniel Verkamp
* @sa http://www.oldskool.org/pc/8088_Corruption
*/
#include "avcodec.h"
#include "cga_data.h"
typedef struct TMVContext {
AVFrame pic;
} TMVContext;
static int tmv_decode_frame(AVCodecContext *avctx, void *data,
int *data_size, AVPacket *avpkt)
{
TMVContext *tmv = avctx->priv_data;
const uint8_t *src = avpkt->data;
uint8_t *dst, *dst_char;
unsigned char_cols = avctx->width >> 3;
unsigned char_rows = avctx->height >> 3;
unsigned x, y, mask, char_y, fg, bg, c;
if (tmv->pic.data[0])
avctx->release_buffer(avctx, &tmv->pic);
if (avctx->get_buffer(avctx, &tmv->pic) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
tmv->pic.pict_type = FF_I_TYPE;
tmv->pic.key_frame = 1;
dst = tmv->pic.data[0];
tmv->pic.palette_has_changed = 1;
memcpy(tmv->pic.data[1], ff_cga_palette, 16 * 4);
for (y = 0; y < char_rows; y++) {
for (x = 0; x < char_cols; x++) {
c = *src++ * 8;
bg = *src >> 4;
fg = *src++ & 0xF;
dst_char = dst + x * 8;
for (char_y = 0; char_y < 8; char_y++) {
for (mask = 0x80; mask; mask >>= 1) {
*dst_char++ = ff_cga_font[c + char_y] & mask ? fg : bg;
}
dst_char += tmv->pic.linesize[0] - 8;
}
}
dst += tmv->pic.linesize[0] * 8;
}
*data_size = sizeof(AVFrame);
*(AVFrame *)data = tmv->pic;
return avpkt->size;
}
static av_cold int tmv_decode_close(AVCodecContext *avctx)
{
TMVContext *tmv = avctx->priv_data;
if (tmv->pic.data[0])
avctx->release_buffer(avctx, &tmv->pic);
return 0;
}
AVCodec tmv_decoder = {
.name = "tmv",
.type = CODEC_TYPE_VIDEO,
.id = CODEC_ID_TMV,
.priv_data_size = sizeof(TMVContext),
.close = tmv_decode_close,
.decode = tmv_decode_frame,
.long_name = NULL_IF_CONFIG_SMALL("8088flex TMV"),
};
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