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FFmpeg/libavcodec/qpeg.c

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/*
* QPEG codec
* Copyright (c) 2004 Konstantin Shishkov
*
* 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
* QPEG codec.
*/
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
typedef struct QpegContext{
AVCodecContext *avctx;
AVFrame *pic, *ref;
uint32_t pal[256];
GetByteContext buffer;
} QpegContext;
static void qpeg_decode_intra(QpegContext *qctx, uint8_t *dst,
int stride, int width, int height)
{
int i;
int code;
int c0, c1;
int run, copy;
int filled = 0;
int rows_to_go;
rows_to_go = height;
height--;
dst = dst + height * stride;
while ((bytestream2_get_bytes_left(&qctx->buffer) > 0) && (rows_to_go > 0)) {
code = bytestream2_get_byte(&qctx->buffer);
run = copy = 0;
if(code == 0xFC) /* end-of-picture code */
break;
if(code >= 0xF8) { /* very long run */
c0 = bytestream2_get_byte(&qctx->buffer);
c1 = bytestream2_get_byte(&qctx->buffer);
run = ((code & 0x7) << 16) + (c0 << 8) + c1 + 2;
} else if (code >= 0xF0) { /* long run */
c0 = bytestream2_get_byte(&qctx->buffer);
run = ((code & 0xF) << 8) + c0 + 2;
} else if (code >= 0xE0) { /* short run */
run = (code & 0x1F) + 2;
} else if (code >= 0xC0) { /* very long copy */
c0 = bytestream2_get_byte(&qctx->buffer);
c1 = bytestream2_get_byte(&qctx->buffer);
copy = ((code & 0x3F) << 16) + (c0 << 8) + c1 + 1;
} else if (code >= 0x80) { /* long copy */
c0 = bytestream2_get_byte(&qctx->buffer);
copy = ((code & 0x7F) << 8) + c0 + 1;
} else { /* short copy */
copy = code + 1;
}
/* perform actual run or copy */
if(run) {
int p;
p = bytestream2_get_byte(&qctx->buffer);
for(i = 0; i < run; i++) {
dst[filled++] = p;
if (filled >= width) {
filled = 0;
dst -= stride;
rows_to_go--;
if(rows_to_go <= 0)
break;
}
}
} else {
for(i = 0; i < copy; i++) {
dst[filled++] = bytestream2_get_byte(&qctx->buffer);
if (filled >= width) {
filled = 0;
dst -= stride;
rows_to_go--;
if(rows_to_go <= 0)
break;
}
}
}
}
}
static const int qpeg_table_h[16] =
{ 0x00, 0x20, 0x20, 0x20, 0x18, 0x10, 0x10, 0x20, 0x10, 0x08, 0x18, 0x08, 0x08, 0x18, 0x10, 0x04};
static const int qpeg_table_w[16] =
{ 0x00, 0x20, 0x18, 0x08, 0x18, 0x10, 0x20, 0x10, 0x08, 0x10, 0x20, 0x20, 0x08, 0x10, 0x18, 0x04};
/* Decodes delta frames */
static void av_noinline qpeg_decode_inter(QpegContext *qctx, uint8_t *dst,
int stride, int width, int height,
int delta, const uint8_t *ctable,
uint8_t *refdata)
{
int i, j;
int code;
int filled = 0;
int orig_height;
if (refdata) {
/* copy prev frame */
for (i = 0; i < height; i++)
memcpy(dst + (i * stride), refdata + (i * stride), width);
} else {
refdata = dst;
}
orig_height = height;
height--;
dst = dst + height * stride;
while ((bytestream2_get_bytes_left(&qctx->buffer) > 0) && (height >= 0)) {
code = bytestream2_get_byte(&qctx->buffer);
if(delta) {
/* motion compensation */
while(bytestream2_get_bytes_left(&qctx->buffer) > 0 && (code & 0xF0) == 0xF0) {
if(delta == 1) {
int me_idx;
int me_w, me_h, me_x, me_y;
uint8_t *me_plane;
int corr, val;
/* get block size by index */
me_idx = code & 0xF;
me_w = qpeg_table_w[me_idx];
me_h = qpeg_table_h[me_idx];
/* extract motion vector */
corr = bytestream2_get_byte(&qctx->buffer);
val = corr >> 4;
if(val > 7)
val -= 16;
me_x = val;
val = corr & 0xF;
if(val > 7)
val -= 16;
me_y = val;
/* check motion vector */
if ((me_x + filled < 0) || (me_x + me_w + filled > width) ||
(height - me_y - me_h < 0) || (height - me_y >= orig_height) ||
(filled + me_w > width) || (height - me_h < 0))
av_log(qctx->avctx, AV_LOG_ERROR, "Bogus motion vector (%i,%i), block size %ix%i at %i,%i\n",
me_x, me_y, me_w, me_h, filled, height);
else {
/* do motion compensation */
me_plane = refdata + (filled + me_x) + (height - me_y) * stride;
for(j = 0; j < me_h; j++) {
for(i = 0; i < me_w; i++)
dst[filled + i - (j * stride)] = me_plane[i - (j * stride)];
}
}
}
code = bytestream2_get_byte(&qctx->buffer);
}
}
if(code == 0xE0) /* end-of-picture code */
break;
if(code > 0xE0) { /* run code: 0xE1..0xFF */
int p;
code &= 0x1F;
p = bytestream2_get_byte(&qctx->buffer);
for(i = 0; i <= code; i++) {
dst[filled++] = p;
if(filled >= width) {
filled = 0;
dst -= stride;
height--;
if (height < 0)
break;
}
}
} else if(code >= 0xC0) { /* copy code: 0xC0..0xDF */
code &= 0x1F;
if(code + 1 > bytestream2_get_bytes_left(&qctx->buffer))
break;
for(i = 0; i <= code; i++) {
dst[filled++] = bytestream2_get_byte(&qctx->buffer);
if(filled >= width) {
filled = 0;
dst -= stride;
height--;
if (height < 0)
break;
}
}
} else if(code >= 0x80) { /* skip code: 0x80..0xBF */
int skip;
code &= 0x3F;
/* codes 0x80 and 0x81 are actually escape codes,
skip value minus constant is in the next byte */
if(!code)
skip = bytestream2_get_byte(&qctx->buffer) + 64;
else if(code == 1)
skip = bytestream2_get_byte(&qctx->buffer) + 320;
else
skip = code;
filled += skip;
while( filled >= width) {
filled -= width;
dst -= stride;
height--;
if(height < 0)
break;
}
} else {
/* zero code treated as one-pixel skip */
if(code) {
dst[filled++] = ctable[code & 0x7F];
}
else
filled++;
if(filled >= width) {
filled = 0;
dst -= stride;
height--;
}
}
}
}
static int decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
{
uint8_t ctable[128];
QpegContext * const a = avctx->priv_data;
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AVFrame * const p = a->pic;
AVFrame * const ref = a->ref;
uint8_t* outdata;
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int delta, ret;
int pal_size;
const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, &pal_size);
if (avpkt->size < 0x86) {
av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
return AVERROR_INVALIDDATA;
}
bytestream2_init(&a->buffer, avpkt->data, avpkt->size);
Merge commit '759001c534287a96dc96d1e274665feb7059145d' * commit '759001c534287a96dc96d1e274665feb7059145d': lavc decoders: work with refcounted frames. Anton Khirnov (1): lavc decoders: work with refcounted frames. Clément Bœsch (47): lavc/ansi: reset file lavc/ansi: re-do refcounted frame changes from Anton fraps: reset file lavc/fraps: switch to refcounted frames gifdec: reset file lavc/gifdec: switch to refcounted frames dsicinav: resolve conflicts smc: resolve conflicts zmbv: resolve conflicts rpza: resolve conflicts vble: resolve conflicts xxan: resolve conflicts targa: resolve conflicts vmnc: resolve conflicts utvideodec: resolve conflicts tscc: resolve conflicts ulti: resolve conflicts ffv1dec: resolve conflicts dnxhddec: resolve conflicts v210dec: resolve conflicts vp3: resolve conflicts vcr1: resolve conflicts v210x: resolve conflicts wavpack: resolve conflicts pngdec: fix compilation roqvideodec: resolve conflicts pictordec: resolve conflicts mdec: resolve conflicts tiertexseqv: resolve conflicts smacker: resolve conflicts vb: resolve conflicts vqavideo: resolve conflicts xl: resolve conflicts tmv: resolve conflicts vmdav: resolve conflicts truemotion1: resolve conflicts truemotion2: resolve conflicts lcldec: fix compilation libcelt_dec: fix compilation qdrw: fix compilation r210dec: fix compilation rl2: fix compilation wnv1: fix compilation yop: fix compilation tiff: resolve conflicts interplayvideo: fix compilation qpeg: resolve conflicts (FIXME/TESTME). Hendrik Leppkes (33): 012v: convert to refcounted frames 8bps: fix compilation 8svx: resolve conflicts 4xm: resolve conflicts aasc: resolve conflicts bfi: fix compilation aura: fix compilation alsdec: resolve conflicts avrndec: convert to refcounted frames avuidec: convert to refcounted frames bintext: convert to refcounted frames cavsdec: resolve conflicts brender_pix: convert to refcounted frames cinepak: resolve conflicts cinepak: avoid using AVFrame struct directly in private context cljr: fix compilation cpia: convert to refcounted frames cscd: resolve conflicts iff: resolve conflicts and do proper conversion to refcounted frames 4xm: fix reference frame handling cyuv: fix compilation dxa: fix compilation eacmv: fix compilation eamad: fix compilation eatgv: fix compilation escape124: remove unused variable. escape130: convert to refcounted frames evrcdec: convert to refcounted frames exr: convert to refcounted frames mvcdec: convert to refcounted frames paf: properly free the frame data on decode close sgirle: convert to refcounted frames lavfi/moviesrc: use refcounted frames Michael Niedermayer (56): Merge commit '759001c534287a96dc96d1e274665feb7059145d' resolve conflicts in headers motion_est: resolve conflict mpeg4videodec: fix conflicts dpcm conflict fix dpx: fix conflicts indeo3: resolve confilcts kmvc: resolve conflicts kmvc: resolve conflicts h264: resolve conflicts utils: resolve conflicts rawdec: resolve conflcits mpegvideo: resolve conflicts svq1enc: resolve conflicts mpegvideo: dont clear data, fix assertion failure on fate vsynth1 with threads pthreads: resolve conflicts frame_thread_encoder: simple compilefix not yet tested snow: update to buffer refs crytsalhd: fix compile dirac: switch to new API sonic: update to new API svq1: resolve conflict, update to new API ffwavesynth: update to new buffer API g729: update to new API indeo5: fix compile j2kdec: update to new buffer API linopencore-amr: fix compile libvorbisdec: update to new API loco: fix compile paf: update to new API proresdec: update to new API vp56: update to new api / resolve conflicts xface: convert to refcounted frames xan: fix compile&fate v408: update to ref counted buffers v308: update to ref counted buffers yuv4dec: update to ref counted buffers y41p: update to ref counted frames xbm: update to refcounted frames targa_y216: update to refcounted buffers qpeg: fix fate/crash cdxl: fix fate tscc: fix reget buffer useage targa_y216dec: fix style msmpeg4: fix fate h264: ref_picture() copy fields that have been lost too update_frame_pool: use channel field h264: Put code that prevents deadlocks back mpegvideo: dont allow last == current wmalossless: fix buffer ref messup ff_alloc_picture: free tables in case of dimension mismatches h264: fix null pointer dereference and assertion failure frame_thread_encoder: update to bufrefs ec: fix used arrays snowdec: fix off by 1 error in dimensions check h264: disallow single unpaired fields as references of frames Paul B Mahol (2): lavc/vima: convert to refcounted frames sanm: convert to refcounted frames Conflicts: libavcodec/4xm.c libavcodec/8bps.c libavcodec/8svx.c libavcodec/aasc.c libavcodec/alsdec.c libavcodec/anm.c libavcodec/ansi.c libavcodec/avs.c libavcodec/bethsoftvideo.c libavcodec/bfi.c libavcodec/c93.c libavcodec/cavsdec.c libavcodec/cdgraphics.c libavcodec/cinepak.c libavcodec/cljr.c libavcodec/cscd.c libavcodec/dnxhddec.c libavcodec/dpcm.c libavcodec/dpx.c libavcodec/dsicinav.c libavcodec/dvdec.c libavcodec/dxa.c libavcodec/eacmv.c libavcodec/eamad.c libavcodec/eatgq.c libavcodec/eatgv.c libavcodec/eatqi.c libavcodec/error_resilience.c libavcodec/escape124.c libavcodec/ffv1.h libavcodec/ffv1dec.c libavcodec/flicvideo.c libavcodec/fraps.c libavcodec/frwu.c libavcodec/g723_1.c libavcodec/gifdec.c libavcodec/h264.c libavcodec/h264.h libavcodec/h264_direct.c libavcodec/h264_loopfilter.c libavcodec/h264_refs.c libavcodec/huffyuvdec.c libavcodec/idcinvideo.c libavcodec/iff.c libavcodec/indeo2.c libavcodec/indeo3.c libavcodec/internal.h libavcodec/interplayvideo.c libavcodec/ivi_common.c libavcodec/jvdec.c libavcodec/kgv1dec.c libavcodec/kmvc.c libavcodec/lagarith.c libavcodec/libopenjpegdec.c libavcodec/mdec.c libavcodec/mimic.c libavcodec/mjpegbdec.c libavcodec/mjpegdec.c libavcodec/mmvideo.c libavcodec/motion_est.c libavcodec/motionpixels.c libavcodec/mpc7.c libavcodec/mpeg12.c libavcodec/mpeg4videodec.c libavcodec/mpegvideo.c libavcodec/mpegvideo.h libavcodec/msrle.c libavcodec/msvideo1.c libavcodec/nuv.c libavcodec/options_table.h libavcodec/pcx.c libavcodec/pictordec.c libavcodec/pngdec.c libavcodec/pnmdec.c libavcodec/pthread.c libavcodec/qpeg.c libavcodec/qtrle.c libavcodec/r210dec.c libavcodec/rawdec.c libavcodec/roqvideodec.c libavcodec/rpza.c libavcodec/smacker.c libavcodec/smc.c libavcodec/svq1dec.c libavcodec/svq1enc.c libavcodec/targa.c libavcodec/tiertexseqv.c libavcodec/tiff.c libavcodec/tmv.c libavcodec/truemotion1.c libavcodec/truemotion2.c libavcodec/tscc.c libavcodec/ulti.c libavcodec/utils.c libavcodec/utvideodec.c libavcodec/v210dec.c libavcodec/v210x.c libavcodec/vb.c libavcodec/vble.c libavcodec/vcr1.c libavcodec/vmdav.c libavcodec/vmnc.c libavcodec/vp3.c libavcodec/vp56.c libavcodec/vp56.h libavcodec/vp6.c libavcodec/vqavideo.c libavcodec/wavpack.c libavcodec/xl.c libavcodec/xxan.c libavcodec/zmbv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
2013-03-12 05:20:18 +03:00
av_frame_unref(ref);
av_frame_move_ref(ref, p);
if ((ret = ff_get_buffer(avctx, p, AV_GET_BUFFER_FLAG_REF)) < 0)
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return ret;
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outdata = p->data[0];
bytestream2_skip(&a->buffer, 4);
bytestream2_get_buffer(&a->buffer, ctable, 128);
bytestream2_skip(&a->buffer, 1);
delta = bytestream2_get_byte(&a->buffer);
if(delta == 0x10) {
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qpeg_decode_intra(a, outdata, p->linesize[0], avctx->width, avctx->height);
} else {
qpeg_decode_inter(a, outdata, p->linesize[0], avctx->width, avctx->height, delta, ctable, ref->data[0]);
}
/* make the palette available on the way out */
if (pal && pal_size == AVPALETTE_SIZE) {
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p->palette_has_changed = 1;
memcpy(a->pal, pal, AVPALETTE_SIZE);
} else if (pal) {
av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", pal_size);
}
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memcpy(p->data[1], a->pal, AVPALETTE_SIZE);
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if ((ret = av_frame_ref(data, p)) < 0)
return ret;
*got_frame = 1;
return avpkt->size;
}
static void decode_flush(AVCodecContext *avctx){
QpegContext * const a = avctx->priv_data;
int i, pal_size;
const uint8_t *pal_src;
pal_size = FFMIN(1024U, avctx->extradata_size);
pal_src = avctx->extradata + avctx->extradata_size - pal_size;
for (i=0; i<pal_size/4; i++)
a->pal[i] = 0xFFU<<24 | AV_RL32(pal_src+4*i);
}
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static av_cold int decode_end(AVCodecContext *avctx)
{
QpegContext * const a = avctx->priv_data;
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av_frame_free(&a->pic);
av_frame_free(&a->ref);
return 0;
}
static av_cold int decode_init(AVCodecContext *avctx){
QpegContext * const a = avctx->priv_data;
a->avctx = avctx;
avctx->pix_fmt= AV_PIX_FMT_PAL8;
decode_flush(avctx);
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a->pic = av_frame_alloc();
a->ref = av_frame_alloc();
if (!a->pic || !a->ref) {
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decode_end(avctx);
return AVERROR(ENOMEM);
}
return 0;
}
AVCodec ff_qpeg_decoder = {
.name = "qpeg",
.long_name = NULL_IF_CONFIG_SMALL("Q-team QPEG"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_QPEG,
.priv_data_size = sizeof(QpegContext),
.init = decode_init,
.close = decode_end,
.decode = decode_frame,
.flush = decode_flush,
.capabilities = AV_CODEC_CAP_DR1,
};