FFmpeg/libavcodec/roqvideodec.c
Stefano Sabatini 72415b2adb Define AVMediaType enum, and use it instead of enum CodecType, which
is deprecated and will be dropped at the next major bump.

Originally committed as revision 22735 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-03-30 23:30:55 +00:00

225 lines
7.6 KiB
C

/*
* Copyright (C) 2003 the ffmpeg project
*
* 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 libavcodec/roqvideodec.c
* id RoQ Video Decoder by Dr. Tim Ferguson
* For more information about the id RoQ format, visit:
* http://www.csse.monash.edu.au/~timf/
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "avcodec.h"
#include "bytestream.h"
#include "roqvideo.h"
static void roqvideo_decode_frame(RoqContext *ri)
{
unsigned int chunk_id = 0, chunk_arg = 0;
unsigned long chunk_size = 0;
int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1;
int vqid, bpos, xpos, ypos, xp, yp, x, y, mx, my;
int frame_stats[2][4] = {{0},{0}};
roq_qcell *qcell;
const unsigned char *buf = ri->buf;
const unsigned char *buf_end = ri->buf + ri->size;
while (buf < buf_end) {
chunk_id = bytestream_get_le16(&buf);
chunk_size = bytestream_get_le32(&buf);
chunk_arg = bytestream_get_le16(&buf);
if(chunk_id == RoQ_QUAD_VQ)
break;
if(chunk_id == RoQ_QUAD_CODEBOOK) {
if((nv1 = chunk_arg >> 8) == 0)
nv1 = 256;
if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size)
nv2 = 256;
for(i = 0; i < nv1; i++) {
ri->cb2x2[i].y[0] = *buf++;
ri->cb2x2[i].y[1] = *buf++;
ri->cb2x2[i].y[2] = *buf++;
ri->cb2x2[i].y[3] = *buf++;
ri->cb2x2[i].u = *buf++;
ri->cb2x2[i].v = *buf++;
}
for(i = 0; i < nv2; i++)
for(j = 0; j < 4; j++)
ri->cb4x4[i].idx[j] = *buf++;
}
}
bpos = xpos = ypos = 0;
while(bpos < chunk_size) {
for (yp = ypos; yp < ypos + 16; yp += 8)
for (xp = xpos; xp < xpos + 16; xp += 8) {
if (vqflg_pos < 0) {
vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8);
vqflg_pos = 7;
}
vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
frame_stats[0][vqid]++;
vqflg_pos--;
switch(vqid) {
case RoQ_ID_MOT:
break;
case RoQ_ID_FCC:
mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8));
my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg);
ff_apply_motion_8x8(ri, xp, yp, mx, my);
break;
case RoQ_ID_SLD:
qcell = ri->cb4x4 + buf[bpos++];
ff_apply_vector_4x4(ri, xp, yp, ri->cb2x2 + qcell->idx[0]);
ff_apply_vector_4x4(ri, xp+4, yp, ri->cb2x2 + qcell->idx[1]);
ff_apply_vector_4x4(ri, xp, yp+4, ri->cb2x2 + qcell->idx[2]);
ff_apply_vector_4x4(ri, xp+4, yp+4, ri->cb2x2 + qcell->idx[3]);
break;
case RoQ_ID_CCC:
for (k = 0; k < 4; k++) {
x = xp; y = yp;
if(k & 0x01) x += 4;
if(k & 0x02) y += 4;
if (vqflg_pos < 0) {
vqflg = buf[bpos++];
vqflg |= (buf[bpos++] << 8);
vqflg_pos = 7;
}
vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
frame_stats[1][vqid]++;
vqflg_pos--;
switch(vqid) {
case RoQ_ID_MOT:
break;
case RoQ_ID_FCC:
mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8));
my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg);
ff_apply_motion_4x4(ri, x, y, mx, my);
break;
case RoQ_ID_SLD:
qcell = ri->cb4x4 + buf[bpos++];
ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + qcell->idx[0]);
ff_apply_vector_2x2(ri, x+2, y, ri->cb2x2 + qcell->idx[1]);
ff_apply_vector_2x2(ri, x, y+2, ri->cb2x2 + qcell->idx[2]);
ff_apply_vector_2x2(ri, x+2, y+2, ri->cb2x2 + qcell->idx[3]);
break;
case RoQ_ID_CCC:
ff_apply_vector_2x2(ri, x, y, ri->cb2x2 + buf[bpos]);
ff_apply_vector_2x2(ri, x+2, y, ri->cb2x2 + buf[bpos+1]);
ff_apply_vector_2x2(ri, x, y+2, ri->cb2x2 + buf[bpos+2]);
ff_apply_vector_2x2(ri, x+2, y+2, ri->cb2x2 + buf[bpos+3]);
bpos += 4;
break;
}
}
break;
default:
av_log(ri->avctx, AV_LOG_ERROR, "Unknown vq code: %d\n", vqid);
}
}
xpos += 16;
if (xpos >= ri->width) {
xpos -= ri->width;
ypos += 16;
}
if(ypos >= ri->height)
break;
}
}
static av_cold int roq_decode_init(AVCodecContext *avctx)
{
RoqContext *s = avctx->priv_data;
s->avctx = avctx;
s->width = avctx->width;
s->height = avctx->height;
s->last_frame = &s->frames[0];
s->current_frame = &s->frames[1];
avctx->pix_fmt = PIX_FMT_YUV444P;
return 0;
}
static int roq_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
RoqContext *s = avctx->priv_data;
int copy= !s->current_frame->data[0];
if (avctx->reget_buffer(avctx, s->current_frame)) {
av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n");
return -1;
}
if(copy)
av_picture_copy((AVPicture*)s->current_frame, (AVPicture*)s->last_frame,
avctx->pix_fmt, avctx->width, avctx->height);
s->buf = buf;
s->size = buf_size;
roqvideo_decode_frame(s);
*data_size = sizeof(AVFrame);
*(AVFrame*)data = *s->current_frame;
/* shuffle frames */
FFSWAP(AVFrame *, s->current_frame, s->last_frame);
return buf_size;
}
static av_cold int roq_decode_end(AVCodecContext *avctx)
{
RoqContext *s = avctx->priv_data;
/* release the last frame */
if (s->last_frame->data[0])
avctx->release_buffer(avctx, s->last_frame);
if (s->current_frame->data[0])
avctx->release_buffer(avctx, s->current_frame);
return 0;
}
AVCodec roq_decoder = {
"roqvideo",
AVMEDIA_TYPE_VIDEO,
CODEC_ID_ROQ,
sizeof(RoqContext),
roq_decode_init,
NULL,
roq_decode_end,
roq_decode_frame,
CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("id RoQ video"),
};