Commit 1dc1ed99 authored by Roberto Togni's avatar Roberto Togni
Browse files

8BPS decoder

Originally committed as revision 2486 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent e02c251e
......@@ -701,6 +701,7 @@ following image formats are supported:
@item Microsoft Video-1 @tab @tab X
@item Westwood VQA @tab @tab X
@item Id Cinematic Video @tab @tab X @tab used in Quake II
@item Planar RGB @tab @tab X @tab fourcc: 8BPS
@end multitable
@code{X} means that the encoding (resp. decoding) is supported.
......
/*
* Quicktime Planar RGB (8BPS) Video Decoder
* Copyright (C) 2003 Roberto Togni
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/**
* @file 8bps.c
* QT 8BPS Video Decoder by Roberto Togni <rtogni at bresciaonline dot it>
* For more information about the 8BPS format, visit:
* http://www.pcisys.net/~melanson/codecs/
*
* Supports: PAL8 (RGB 8bpp, paletted)
* : BGR24 (RGB 24bpp) (can also output it as RGBA32)
* : RGBA32 (RGB 32bpp, 4th plane is probably alpha and it's ignored)
*
*/
#include <stdio.h>
#include <stdlib.h>
#include "common.h"
#include "avcodec.h"
const enum PixelFormat pixfmt_rgb24[] = {PIX_FMT_BGR24, PIX_FMT_RGBA32, -1};
/*
* Decoder context
*/
typedef struct EightBpsContext {
AVCodecContext *avctx;
AVFrame pic;
unsigned char planes;
unsigned char planemap[4];
} EightBpsContext;
/*
*
* Decode a frame
*
*/
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
{
EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
unsigned char *encoded = (unsigned char *)buf;
unsigned char *pixptr;
unsigned int height = avctx->height; // Real image height
unsigned int dlen, p, row;
unsigned char *lp, *dp;
unsigned char count;
unsigned int px_inc;
unsigned int planes = c->planes;
unsigned char *planemap = c->planemap;
/* no supplementary picture */
if (buf_size == 0)
return 0;
if(c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
c->pic.reference = 0;
c->pic.buffer_hints = FF_BUFFER_HINTS_VALID;
if(avctx->get_buffer(avctx, &c->pic) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
/* Set data pointer after line lengths */
dp = encoded + planes * (height << 1);
/* Ignore alpha plane, don't know what to do with it */
if (planes == 4)
planes--;
px_inc = planes + (avctx->pix_fmt == PIX_FMT_RGBA32);
for (p = 0; p < planes; p++) {
/* Lines length pointer for this plane */
lp = encoded + p * (height << 1);
/* Decode a plane */
for(row = 0; row < height; row++) {
pixptr = c->pic.data[0] + row * c->pic.linesize[0] + planemap[p];
dlen = be2me_16(*(unsigned short *)(lp+row*2));
/* Decode a row of this plane */
while(dlen > 0) {
if ((count = *dp++) <= 127) {
count++;
dlen -= count + 1;
while(count--) {
*pixptr = *dp++;
pixptr += px_inc;
}
} else {
count = 257 - count;
while(count--) {
*pixptr = *dp;
pixptr += px_inc;
}
dp++;
dlen -= 2;
}
}
}
}
if (avctx->palctrl) {
memcpy (c->pic.data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
if (avctx->palctrl->palette_changed) {
c->pic.palette_has_changed = 1;
avctx->palctrl->palette_changed = 0;
} else
c->pic.palette_has_changed = 0;
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = c->pic;
/* always report that the buffer was completely consumed */
return buf_size;
}
/*
*
* Init 8BPS decoder
*
*/
static int decode_init(AVCodecContext *avctx)
{
EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
c->avctx = avctx;
avctx->has_b_frames = 0;
c->pic.data[0] = NULL;
switch (avctx->bits_per_sample) {
case 8:
avctx->pix_fmt = PIX_FMT_PAL8;
c->planes = 1;
c->planemap[0] = 0; // 1st plane is palette indexes
if (avctx->palctrl == NULL) {
av_log(avctx, AV_LOG_ERROR, "Error: PAL8 format but no palette from demuxer.\n");
return -1;
}
break;
case 24:
avctx->pix_fmt = avctx->get_format(avctx, pixfmt_rgb24);
c->planes = 3;
c->planemap[0] = 2; // 1st plane is red
c->planemap[1] = 1; // 2nd plane is green
c->planemap[2] = 0; // 3rd plane is blue
break;
case 32:
avctx->pix_fmt = PIX_FMT_RGBA32;
c->planes = 4;
#ifdef WORDS_BIGENDIAN
c->planemap[0] = 1; // 1st plane is red
c->planemap[1] = 2; // 2nd plane is green
c->planemap[2] = 3; // 3rd plane is blue
c->planemap[3] = 0; // 4th plane is alpha???
#else
c->planemap[0] = 2; // 1st plane is red
c->planemap[1] = 1; // 2nd plane is green
c->planemap[2] = 0; // 3rd plane is blue
c->planemap[3] = 3; // 4th plane is alpha???
#endif
break;
default:
av_log(avctx, AV_LOG_ERROR, "Error: Unsupported color depth: %u.\n", avctx->bits_per_sample);
return -1;
}
return 0;
}
/*
*
* Uninit 8BPS decoder
*
*/
static int decode_end(AVCodecContext *avctx)
{
EightBpsContext * const c = (EightBpsContext *)avctx->priv_data;
if (c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
return 0;
}
AVCodec eightbps_decoder = {
"8bps",
CODEC_TYPE_VIDEO,
CODEC_ID_8BPS,
sizeof(EightBpsContext),
decode_init,
NULL,
decode_end,
decode_frame,
CODEC_CAP_DR1,
};
......@@ -18,7 +18,7 @@ OBJS= common.o utils.o mem.o allcodecs.o \
fft.o mdct.o mace.o huffyuv.o cyuv.o opts.o raw.o h264.o golomb.o \
vp3.o asv1.o 4xm.o cabac.o ffv1.o ra144.o ra288.o vcr1.o cljr.o \
roqvideo.o dpcm.o interplayvideo.o xan.o rpza.o cinepak.o msrle.o \
msvideo1.o vqavideo.o idcinvideo.o adx.o rational.o faandct.o
msvideo1.o vqavideo.o idcinvideo.o adx.o rational.o faandct.o 8bps.o
ifeq ($(AMR_NB),yes)
ifeq ($(AMR_NB_FIXED),yes)
......
......@@ -134,6 +134,7 @@ void avcodec_register_all(void)
register_avcodec(&msvideo1_decoder);
register_avcodec(&vqa_decoder);
register_avcodec(&idcin_decoder);
register_avcodec(&eightbps_decoder);
#ifdef CONFIG_AC3
register_avcodec(&ac3_decoder);
#endif
......
......@@ -83,6 +83,7 @@ enum CodecID {
CODEC_ID_MSRLE,
CODEC_ID_MSVIDEO1,
CODEC_ID_IDCIN,
CODEC_ID_8BPS,
/* various pcm "codecs" */
CODEC_ID_PCM_S16LE,
......@@ -1566,6 +1567,7 @@ extern AVCodec msrle_decoder;
extern AVCodec msvideo1_decoder;
extern AVCodec vqa_decoder;
extern AVCodec idcin_decoder;
extern AVCodec eightbps_decoder;
extern AVCodec ra_144_decoder;
extern AVCodec ra_288_decoder;
extern AVCodec roq_dpcm_decoder;
......
......@@ -101,6 +101,7 @@ static const CodecTag mov_video_tags[] = {
{ CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */
{ CODEC_ID_RPZA, MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */
{ CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */
{ CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */
{ CODEC_ID_NONE, 0 },
};
......
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