mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
225 lines
8.2 KiB
225 lines
8.2 KiB
/* |
|
* Copyright (C) 2003 the ffmpeg project |
|
* |
|
* This file is part of Libav. |
|
* |
|
* Libav 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. |
|
* |
|
* Libav 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 Libav; if not, write to the Free Software |
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
*/ |
|
|
|
/** |
|
* @file |
|
* 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, xpos, ypos, xp, yp, x, y, mx, my; |
|
int frame_stats[2][4] = {{0},{0}}; |
|
roq_qcell *qcell; |
|
int64_t chunk_start; |
|
|
|
while (bytestream2_get_bytes_left(&ri->gb) > 0) { |
|
chunk_id = bytestream2_get_le16(&ri->gb); |
|
chunk_size = bytestream2_get_le32(&ri->gb); |
|
chunk_arg = bytestream2_get_le16(&ri->gb); |
|
|
|
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] = bytestream2_get_byte(&ri->gb); |
|
ri->cb2x2[i].y[1] = bytestream2_get_byte(&ri->gb); |
|
ri->cb2x2[i].y[2] = bytestream2_get_byte(&ri->gb); |
|
ri->cb2x2[i].y[3] = bytestream2_get_byte(&ri->gb); |
|
ri->cb2x2[i].u = bytestream2_get_byte(&ri->gb); |
|
ri->cb2x2[i].v = bytestream2_get_byte(&ri->gb); |
|
} |
|
for(i = 0; i < nv2; i++) |
|
for(j = 0; j < 4; j++) |
|
ri->cb4x4[i].idx[j] = bytestream2_get_byte(&ri->gb); |
|
} |
|
} |
|
|
|
chunk_start = bytestream2_tell(&ri->gb); |
|
xpos = ypos = 0; |
|
while (bytestream2_tell(&ri->gb) < chunk_start + chunk_size) { |
|
for (yp = ypos; yp < ypos + 16; yp += 8) |
|
for (xp = xpos; xp < xpos + 16; xp += 8) { |
|
if (vqflg_pos < 0) { |
|
vqflg = bytestream2_get_le16(&ri->gb); |
|
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: { |
|
int byte = bytestream2_get_byte(&ri->gb); |
|
mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8)); |
|
my = 8 - (byte & 0xf) - ((signed char) chunk_arg); |
|
ff_apply_motion_8x8(ri, xp, yp, mx, my); |
|
break; |
|
} |
|
case RoQ_ID_SLD: |
|
qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb); |
|
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 = bytestream2_get_le16(&ri->gb); |
|
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: { |
|
int byte = bytestream2_get_byte(&ri->gb); |
|
mx = 8 - (byte >> 4) - ((signed char) (chunk_arg >> 8)); |
|
my = 8 - (byte & 0xf) - ((signed char) chunk_arg); |
|
ff_apply_motion_4x4(ri, x, y, mx, my); |
|
break; |
|
} |
|
case RoQ_ID_SLD: |
|
qcell = ri->cb4x4 + bytestream2_get_byte(&ri->gb); |
|
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 + bytestream2_get_byte(&ri->gb)); |
|
ff_apply_vector_2x2(ri, x + 2, y, ri->cb2x2 + bytestream2_get_byte(&ri->gb)); |
|
ff_apply_vector_2x2(ri, x, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb)); |
|
ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + bytestream2_get_byte(&ri->gb)); |
|
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 = AV_PIX_FMT_YUV444P; |
|
|
|
return 0; |
|
} |
|
|
|
static int roq_decode_frame(AVCodecContext *avctx, |
|
void *data, int *got_frame, |
|
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]; |
|
|
|
s->current_frame->reference = 3; |
|
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); |
|
|
|
bytestream2_init(&s->gb, buf, buf_size); |
|
roqvideo_decode_frame(s); |
|
|
|
*got_frame = 1; |
|
*(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 ff_roq_decoder = { |
|
.name = "roqvideo", |
|
.type = AVMEDIA_TYPE_VIDEO, |
|
.id = AV_CODEC_ID_ROQ, |
|
.priv_data_size = sizeof(RoqContext), |
|
.init = roq_decode_init, |
|
.close = roq_decode_end, |
|
.decode = roq_decode_frame, |
|
.capabilities = CODEC_CAP_DR1, |
|
.long_name = NULL_IF_CONFIG_SMALL("id RoQ video"), |
|
};
|
|
|