mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
08dd036b9f
Also stop setting the field once per encode-frame. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
247 lines
8.7 KiB
C
247 lines
8.7 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
|
|
* 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 "libavutil/avassert.h"
|
|
|
|
#include "avcodec.h"
|
|
#include "bytestream.h"
|
|
#include "codec_internal.h"
|
|
#include "decode.h"
|
|
#include "roqvideo.h"
|
|
|
|
static void roqvideo_decode_frame(RoqContext *ri, GetByteContext *gb)
|
|
{
|
|
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;
|
|
roq_qcell *qcell;
|
|
int64_t chunk_start;
|
|
|
|
while (bytestream2_get_bytes_left(gb) >= 8) {
|
|
chunk_id = bytestream2_get_le16(gb);
|
|
chunk_size = bytestream2_get_le32(gb);
|
|
chunk_arg = bytestream2_get_le16(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(gb);
|
|
ri->cb2x2[i].y[1] = bytestream2_get_byte(gb);
|
|
ri->cb2x2[i].y[2] = bytestream2_get_byte(gb);
|
|
ri->cb2x2[i].y[3] = bytestream2_get_byte(gb);
|
|
ri->cb2x2[i].u = bytestream2_get_byte(gb);
|
|
ri->cb2x2[i].v = bytestream2_get_byte(gb);
|
|
}
|
|
for(i = 0; i < nv2; i++)
|
|
for(j = 0; j < 4; j++)
|
|
ri->cb4x4[i].idx[j] = bytestream2_get_byte(gb);
|
|
}
|
|
}
|
|
|
|
chunk_start = bytestream2_tell(gb);
|
|
xpos = ypos = 0;
|
|
|
|
if (chunk_size > bytestream2_get_bytes_left(gb)) {
|
|
av_log(ri->logctx, AV_LOG_ERROR, "Chunk does not fit in input buffer\n");
|
|
chunk_size = bytestream2_get_bytes_left(gb);
|
|
}
|
|
|
|
while (bytestream2_tell(gb) < chunk_start + chunk_size) {
|
|
for (yp = ypos; yp < ypos + 16; yp += 8)
|
|
for (xp = xpos; xp < xpos + 16; xp += 8) {
|
|
if (bytestream2_tell(gb) >= chunk_start + chunk_size) {
|
|
av_log(ri->logctx, AV_LOG_VERBOSE, "Chunk is too short\n");
|
|
return;
|
|
}
|
|
if (vqflg_pos < 0) {
|
|
vqflg = bytestream2_get_le16(gb);
|
|
vqflg_pos = 7;
|
|
}
|
|
vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
|
|
vqflg_pos--;
|
|
|
|
switch(vqid) {
|
|
case RoQ_ID_MOT:
|
|
break;
|
|
case RoQ_ID_FCC: {
|
|
int byte = bytestream2_get_byte(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(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 (bytestream2_tell(gb) >= chunk_start + chunk_size) {
|
|
av_log(ri->logctx, AV_LOG_VERBOSE, "Chunk is too short\n");
|
|
return;
|
|
}
|
|
if (vqflg_pos < 0) {
|
|
vqflg = bytestream2_get_le16(gb);
|
|
vqflg_pos = 7;
|
|
}
|
|
vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
|
|
vqflg_pos--;
|
|
switch(vqid) {
|
|
case RoQ_ID_MOT:
|
|
break;
|
|
case RoQ_ID_FCC: {
|
|
int byte = bytestream2_get_byte(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(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(gb));
|
|
ff_apply_vector_2x2(ri, x + 2, y, ri->cb2x2 + bytestream2_get_byte(gb));
|
|
ff_apply_vector_2x2(ri, x, y + 2, ri->cb2x2 + bytestream2_get_byte(gb));
|
|
ff_apply_vector_2x2(ri, x + 2, y + 2, ri->cb2x2 + bytestream2_get_byte(gb));
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
av_assert2(0);
|
|
}
|
|
}
|
|
|
|
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->logctx = avctx;
|
|
|
|
if (avctx->width % 16 || avctx->height % 16) {
|
|
avpriv_request_sample(avctx, "Dimensions not being a multiple of 16");
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
s->width = avctx->width;
|
|
s->height = avctx->height;
|
|
|
|
s->last_frame = av_frame_alloc();
|
|
s->current_frame = av_frame_alloc();
|
|
if (!s->current_frame || !s->last_frame)
|
|
return AVERROR(ENOMEM);
|
|
|
|
avctx->pix_fmt = AV_PIX_FMT_YUVJ444P;
|
|
avctx->color_range = AVCOL_RANGE_JPEG;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int roq_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
|
|
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->last_frame->data[0];
|
|
GetByteContext gb;
|
|
int ret;
|
|
|
|
if ((ret = ff_reget_buffer(avctx, s->current_frame, 0)) < 0)
|
|
return ret;
|
|
|
|
if (copy) {
|
|
ret = av_frame_copy(s->current_frame, s->last_frame);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
bytestream2_init(&gb, buf, buf_size);
|
|
roqvideo_decode_frame(s, &gb);
|
|
|
|
if ((ret = av_frame_ref(rframe, s->current_frame)) < 0)
|
|
return ret;
|
|
*got_frame = 1;
|
|
|
|
/* 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;
|
|
|
|
av_frame_free(&s->current_frame);
|
|
av_frame_free(&s->last_frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
const FFCodec ff_roq_decoder = {
|
|
.p.name = "roqvideo",
|
|
CODEC_LONG_NAME("id RoQ video"),
|
|
.p.type = AVMEDIA_TYPE_VIDEO,
|
|
.p.id = AV_CODEC_ID_ROQ,
|
|
.priv_data_size = sizeof(RoqContext),
|
|
.init = roq_decode_init,
|
|
.close = roq_decode_end,
|
|
FF_CODEC_DECODE_CB(roq_decode_frame),
|
|
.p.capabilities = AV_CODEC_CAP_DR1,
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
|
|
};
|