mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
7f6596c8bb
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
717 lines
23 KiB
C
717 lines
23 KiB
C
/*
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* RV10/RV20 decoder
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* Copyright (c) 2000,2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* RV10/RV20 decoder
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*/
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#include <inttypes.h>
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#include "libavutil/imgutils.h"
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#include "libavutil/thread.h"
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#include "avcodec.h"
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#include "error_resilience.h"
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#include "h263.h"
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#include "h263data.h"
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#include "h263dec.h"
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#include "internal.h"
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#include "mpeg_er.h"
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#include "mpegutils.h"
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#include "mpegvideo.h"
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#include "mpeg4video.h"
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#include "mpegvideodata.h"
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#include "rv10.h"
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#define RV_GET_MAJOR_VER(x) ((x) >> 28)
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#define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF)
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#define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF)
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#define MAX_VLC_ENTRIES 1023 // Note: Does not include the skip entries.
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#define DC_VLC_BITS 9
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typedef struct RVDecContext {
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MpegEncContext m;
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int sub_id;
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int orig_width, orig_height;
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} RVDecContext;
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/* (run, length) encoded value for the symbols table. The actual symbols
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* are run..run - length (mod 256).
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* The last two entries in the following table apply to luma only.
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* The skip values are not included in this list. */
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static const uint8_t rv_sym_run_len[][2] = {
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{ 0, 0 }, { 1, 0 }, { 255, 0 }, { 3, 1 }, { 254, 1 },
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{ 7, 3 }, { 252, 3 }, { 15, 7 }, { 248, 7 }, { 31, 15 },
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{ 240, 15 }, { 63, 31 }, { 224, 31 }, { 127, 63 }, { 192, 63 },
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{ 255, 127 }, { 128, 127 }, { 127, 255 }, { 128, 255 },
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};
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/* entry[i] of the following tables gives
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* the number of VLC codes of length i + 2. */
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static const uint16_t rv_lum_len_count[15] = {
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1, 0, 2, 4, 8, 16, 32, 0, 64, 0, 128, 0, 256, 0, 512,
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};
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static const uint16_t rv_chrom_len_count[15] = {
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1, 2, 4, 0, 8, 0, 16, 0, 32, 0, 64, 0, 128, 0, 256,
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};
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static VLC rv_dc_lum, rv_dc_chrom;
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int ff_rv_decode_dc(MpegEncContext *s, int n)
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{
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int code;
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if (n < 4) {
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code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2);
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} else {
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code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2);
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if (code < 0) {
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av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n");
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return -1;
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}
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}
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return code;
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}
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/* read RV 1.0 compatible frame header */
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static int rv10_decode_picture_header(MpegEncContext *s)
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{
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int mb_count, pb_frame, marker, mb_xy;
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marker = get_bits1(&s->gb);
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if (get_bits1(&s->gb))
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s->pict_type = AV_PICTURE_TYPE_P;
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else
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s->pict_type = AV_PICTURE_TYPE_I;
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if (!marker)
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av_log(s->avctx, AV_LOG_ERROR, "marker missing\n");
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pb_frame = get_bits1(&s->gb);
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ff_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame);
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if (pb_frame) {
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avpriv_request_sample(s->avctx, "PB-frame");
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return AVERROR_PATCHWELCOME;
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}
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s->qscale = get_bits(&s->gb, 5);
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if (s->qscale == 0) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
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return AVERROR_INVALIDDATA;
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}
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if (s->pict_type == AV_PICTURE_TYPE_I) {
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if (s->rv10_version == 3) {
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/* specific MPEG like DC coding not used */
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s->last_dc[0] = get_bits(&s->gb, 8);
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s->last_dc[1] = get_bits(&s->gb, 8);
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s->last_dc[2] = get_bits(&s->gb, 8);
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ff_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0],
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s->last_dc[1], s->last_dc[2]);
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}
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}
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/* if multiple packets per frame are sent, the position at which
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* to display the macroblocks is coded here */
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mb_xy = s->mb_x + s->mb_y * s->mb_width;
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if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) {
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s->mb_x = get_bits(&s->gb, 6); /* mb_x */
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s->mb_y = get_bits(&s->gb, 6); /* mb_y */
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mb_count = get_bits(&s->gb, 12);
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} else {
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s->mb_x = 0;
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s->mb_y = 0;
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mb_count = s->mb_width * s->mb_height;
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}
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skip_bits(&s->gb, 3); /* ignored */
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s->f_code = 1;
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return mb_count;
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}
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static int rv20_decode_picture_header(RVDecContext *rv, int whole_size)
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{
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MpegEncContext *s = &rv->m;
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int seq, mb_pos, i, ret;
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int rpr_max;
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i = get_bits(&s->gb, 2);
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switch (i) {
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case 0:
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s->pict_type = AV_PICTURE_TYPE_I;
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break;
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case 1:
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s->pict_type = AV_PICTURE_TYPE_I;
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break; // hmm ...
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case 2:
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s->pict_type = AV_PICTURE_TYPE_P;
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break;
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case 3:
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s->pict_type = AV_PICTURE_TYPE_B;
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break;
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default:
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av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
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return AVERROR_INVALIDDATA;
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}
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if (s->low_delay && s->pict_type == AV_PICTURE_TYPE_B) {
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av_log(s->avctx, AV_LOG_ERROR, "low delay B\n");
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return -1;
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}
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if (!s->last_picture_ptr && s->pict_type == AV_PICTURE_TYPE_B) {
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av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n");
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return AVERROR_INVALIDDATA;
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}
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if (get_bits1(&s->gb)) {
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av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
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return AVERROR_INVALIDDATA;
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}
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s->qscale = get_bits(&s->gb, 5);
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if (s->qscale == 0) {
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av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n");
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return AVERROR_INVALIDDATA;
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}
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if (RV_GET_MINOR_VER(rv->sub_id) >= 2)
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s->loop_filter = get_bits1(&s->gb) && !s->avctx->lowres;
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if (RV_GET_MINOR_VER(rv->sub_id) <= 1)
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seq = get_bits(&s->gb, 8) << 7;
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else
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seq = get_bits(&s->gb, 13) << 2;
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rpr_max = s->avctx->extradata[1] & 7;
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if (rpr_max) {
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int f, new_w, new_h;
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int rpr_bits = av_log2(rpr_max) + 1;
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f = get_bits(&s->gb, rpr_bits);
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if (f) {
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if (s->avctx->extradata_size < 8 + 2 * f) {
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av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n");
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return AVERROR_INVALIDDATA;
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}
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new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f];
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new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f];
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} else {
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new_w = rv->orig_width;
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new_h = rv->orig_height;
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}
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if (new_w != s->width || new_h != s->height || !s->context_initialized) {
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AVRational old_aspect = s->avctx->sample_aspect_ratio;
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av_log(s->avctx, AV_LOG_DEBUG,
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"attempting to change resolution to %dx%d\n", new_w, new_h);
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if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
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return AVERROR_INVALIDDATA;
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if (whole_size < (new_w + 15)/16 * ((new_h + 15)/16) / 8)
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return AVERROR_INVALIDDATA;
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ff_mpv_common_end(s);
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// attempt to keep aspect during typical resolution switches
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if (!old_aspect.num)
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old_aspect = (AVRational){1, 1};
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if (2 * (int64_t)new_w * s->height == (int64_t)new_h * s->width)
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s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1});
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if ((int64_t)new_w * s->height == 2 * (int64_t)new_h * s->width)
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s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2});
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ret = ff_set_dimensions(s->avctx, new_w, new_h);
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if (ret < 0)
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return ret;
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s->width = new_w;
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s->height = new_h;
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if ((ret = ff_mpv_common_init(s)) < 0)
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return ret;
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}
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if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
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av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d/%d\n", f, rpr_bits, rpr_max);
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}
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}
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if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0)
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return AVERROR_INVALIDDATA;
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mb_pos = ff_h263_decode_mba(s);
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seq |= s->time & ~0x7FFF;
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if (seq - s->time > 0x4000)
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seq -= 0x8000;
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if (seq - s->time < -0x4000)
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seq += 0x8000;
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if (seq != s->time) {
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if (s->pict_type != AV_PICTURE_TYPE_B) {
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s->time = seq;
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s->pp_time = s->time - s->last_non_b_time;
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s->last_non_b_time = s->time;
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} else {
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s->time = seq;
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s->pb_time = s->pp_time - (s->last_non_b_time - s->time);
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}
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}
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if (s->pict_type == AV_PICTURE_TYPE_B) {
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if (s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0) {
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av_log(s->avctx, AV_LOG_DEBUG,
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"messed up order, possible from seeking? skipping current B-frame\n");
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#define ERROR_SKIP_FRAME -123
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return ERROR_SKIP_FRAME;
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}
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ff_mpeg4_init_direct_mv(s);
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}
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s->no_rounding = get_bits1(&s->gb);
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if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
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// binary decoder reads 3+2 bits here but they don't seem to be used
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skip_bits(&s->gb, 5);
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s->f_code = 1;
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s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I;
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s->modified_quant = 1;
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if (!s->avctx->lowres)
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s->loop_filter = 1;
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if (s->avctx->debug & FF_DEBUG_PICT_INFO) {
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av_log(s->avctx, AV_LOG_INFO,
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"num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
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seq, s->mb_x, s->mb_y, s->pict_type, s->qscale,
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s->no_rounding);
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}
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av_assert0(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
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return s->mb_width * s->mb_height - mb_pos;
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}
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static av_cold void rv10_build_vlc(VLC *vlc, const uint16_t len_count[15],
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const uint8_t sym_rl[][2], int sym_rl_elems)
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{
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uint16_t syms[MAX_VLC_ENTRIES];
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uint8_t lens[MAX_VLC_ENTRIES];
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unsigned nb_syms = 0, nb_lens = 0;
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for (unsigned i = 0; i < sym_rl_elems; i++) {
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unsigned cur_sym = sym_rl[i][0];
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for (unsigned tmp = nb_syms + sym_rl[i][1]; nb_syms <= tmp; nb_syms++)
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syms[nb_syms] = 0xFF & cur_sym--;
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}
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for (unsigned i = 0; i < 15; i++)
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for (unsigned tmp = nb_lens + len_count[i]; nb_lens < tmp; nb_lens++)
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lens[nb_lens] = i + 2;
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av_assert1(nb_lens == nb_syms);
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ff_init_vlc_from_lengths(vlc, DC_VLC_BITS, nb_lens, lens, 1,
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syms, 2, 2, 0, INIT_VLC_STATIC_OVERLONG, NULL);
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}
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static av_cold void rv10_init_static(void)
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{
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static VLC_TYPE table[1472 + 992][2];
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rv_dc_lum.table = table;
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rv_dc_lum.table_allocated = 1472;
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rv10_build_vlc(&rv_dc_lum, rv_lum_len_count,
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rv_sym_run_len, FF_ARRAY_ELEMS(rv_sym_run_len));
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for (int i = 0; i < 1 << (DC_VLC_BITS - 7 /* Length of skip prefix */); i++) {
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/* All codes beginning with 0x7F have the same length and value.
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* Modifying the table directly saves us the useless subtables. */
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rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i][0] = 255;
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rv_dc_lum.table[(0x7F << (DC_VLC_BITS - 7)) + i][1] = 18;
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}
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rv_dc_chrom.table = &table[1472];
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rv_dc_chrom.table_allocated = 992;
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rv10_build_vlc(&rv_dc_chrom, rv_chrom_len_count,
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rv_sym_run_len, FF_ARRAY_ELEMS(rv_sym_run_len) - 2);
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for (int i = 0; i < 1 << (DC_VLC_BITS - 9 /* Length of skip prefix */); i++) {
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/* Same as above. */
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rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i][0] = 255;
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rv_dc_chrom.table[(0x1FE << (DC_VLC_BITS - 9)) + i][1] = 18;
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}
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ff_h263_decode_init_vlc();
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}
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static av_cold int rv10_decode_init(AVCodecContext *avctx)
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{
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static AVOnce init_static_once = AV_ONCE_INIT;
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RVDecContext *rv = avctx->priv_data;
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MpegEncContext *s = &rv->m;
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int major_ver, minor_ver, micro_ver, ret;
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if (avctx->extradata_size < 8) {
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av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n");
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return AVERROR_INVALIDDATA;
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}
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if ((ret = av_image_check_size(avctx->coded_width,
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avctx->coded_height, 0, avctx)) < 0)
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return ret;
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ff_mpv_decode_init(s, avctx);
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s->out_format = FMT_H263;
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rv->orig_width =
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s->width = avctx->coded_width;
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rv->orig_height =
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s->height = avctx->coded_height;
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s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1;
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rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4);
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major_ver = RV_GET_MAJOR_VER(rv->sub_id);
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minor_ver = RV_GET_MINOR_VER(rv->sub_id);
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micro_ver = RV_GET_MICRO_VER(rv->sub_id);
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s->low_delay = 1;
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switch (major_ver) {
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case 1:
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s->rv10_version = micro_ver ? 3 : 1;
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s->obmc = micro_ver == 2;
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break;
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case 2:
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if (minor_ver >= 2) {
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s->low_delay = 0;
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s->avctx->has_b_frames = 1;
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}
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break;
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default:
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av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id);
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avpriv_request_sample(avctx, "RV1/2 version");
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return AVERROR_PATCHWELCOME;
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}
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if (avctx->debug & FF_DEBUG_PICT_INFO) {
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av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%"PRIX32"\n", rv->sub_id,
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((uint32_t *) avctx->extradata)[0]);
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}
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avctx->pix_fmt = AV_PIX_FMT_YUV420P;
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ff_mpv_idct_init(s);
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if ((ret = ff_mpv_common_init(s)) < 0)
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return ret;
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ff_h263dsp_init(&s->h263dsp);
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/* init static VLCs */
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ff_thread_once(&init_static_once, rv10_init_static);
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return 0;
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}
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static av_cold int rv10_decode_end(AVCodecContext *avctx)
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{
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MpegEncContext *s = avctx->priv_data;
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ff_mpv_common_end(s);
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return 0;
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}
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static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf,
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int buf_size, int buf_size2, int whole_size)
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{
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RVDecContext *rv = avctx->priv_data;
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MpegEncContext *s = &rv->m;
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int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret;
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active_bits_size = buf_size * 8;
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init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8);
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if (s->codec_id == AV_CODEC_ID_RV10)
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mb_count = rv10_decode_picture_header(s);
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else
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mb_count = rv20_decode_picture_header(rv, whole_size);
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if (mb_count < 0) {
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if (mb_count != ERROR_SKIP_FRAME)
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av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n");
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return AVERROR_INVALIDDATA;
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}
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if (s->mb_x >= s->mb_width ||
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s->mb_y >= s->mb_height) {
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av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y);
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return AVERROR_INVALIDDATA;
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}
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mb_pos = s->mb_y * s->mb_width + s->mb_x;
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left = s->mb_width * s->mb_height - mb_pos;
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if (mb_count > left) {
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av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n");
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return AVERROR_INVALIDDATA;
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}
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if (whole_size < s->mb_width * s->mb_height / 8)
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return AVERROR_INVALIDDATA;
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if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) {
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// FIXME write parser so we always have complete frames?
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if (s->current_picture_ptr) {
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ff_er_frame_end(&s->er);
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ff_mpv_frame_end(s);
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s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0;
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}
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if ((ret = ff_mpv_frame_start(s, avctx)) < 0)
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return ret;
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ff_mpeg_er_frame_start(s);
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} else {
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if (s->current_picture_ptr->f->pict_type != s->pict_type) {
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av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n");
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return AVERROR_INVALIDDATA;
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}
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}
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ff_dlog(avctx, "qscale=%d\n", s->qscale);
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/* default quantization values */
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if (s->codec_id == AV_CODEC_ID_RV10) {
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if (s->mb_y == 0)
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s->first_slice_line = 1;
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} else {
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s->first_slice_line = 1;
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s->resync_mb_x = s->mb_x;
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}
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start_mb_x = s->mb_x;
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s->resync_mb_y = s->mb_y;
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if (s->h263_aic) {
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s->y_dc_scale_table =
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s->c_dc_scale_table = ff_aic_dc_scale_table;
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} else {
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s->y_dc_scale_table =
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s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
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}
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if (s->modified_quant)
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s->chroma_qscale_table = ff_h263_chroma_qscale_table;
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ff_set_qscale(s, s->qscale);
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s->rv10_first_dc_coded[0] = 0;
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s->rv10_first_dc_coded[1] = 0;
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s->rv10_first_dc_coded[2] = 0;
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s->block_wrap[0] =
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s->block_wrap[1] =
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s->block_wrap[2] =
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s->block_wrap[3] = s->b8_stride;
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s->block_wrap[4] =
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s->block_wrap[5] = s->mb_stride;
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ff_init_block_index(s);
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/* decode each macroblock */
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for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) {
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int ret;
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ff_update_block_index(s);
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ff_tlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y);
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s->mv_dir = MV_DIR_FORWARD;
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s->mv_type = MV_TYPE_16X16;
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ret = ff_h263_decode_mb(s, s->block);
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// Repeat the slice end check from ff_h263_decode_mb with our active
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// bitstream size
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if (ret != SLICE_ERROR && active_bits_size >= get_bits_count(&s->gb)) {
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int v = show_bits(&s->gb, 16);
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if (get_bits_count(&s->gb) + 16 > active_bits_size)
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v >>= get_bits_count(&s->gb) + 16 - active_bits_size;
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if (!v)
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ret = SLICE_END;
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}
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if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) &&
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8 * buf_size2 >= get_bits_count(&s->gb)) {
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active_bits_size = buf_size2 * 8;
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av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n",
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8 * buf_size, active_bits_size);
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ret = SLICE_OK;
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}
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if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) {
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av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x,
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s->mb_y);
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return AVERROR_INVALIDDATA;
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}
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if (s->pict_type != AV_PICTURE_TYPE_B)
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ff_h263_update_motion_val(s);
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ff_mpv_reconstruct_mb(s, s->block);
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if (s->loop_filter)
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ff_h263_loop_filter(s);
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if (++s->mb_x == s->mb_width) {
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s->mb_x = 0;
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s->mb_y++;
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ff_init_block_index(s);
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}
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if (s->mb_x == s->resync_mb_x)
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s->first_slice_line = 0;
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if (ret == SLICE_END)
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break;
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}
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ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y,
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ER_MB_END);
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return active_bits_size;
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}
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static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n)
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{
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if (avctx->slice_count)
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return avctx->slice_offset[n];
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else
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return AV_RL32(buf + n * 8);
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}
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static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
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AVPacket *avpkt)
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{
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const uint8_t *buf = avpkt->data;
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int buf_size = avpkt->size;
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MpegEncContext *s = avctx->priv_data;
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AVFrame *pict = data;
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int i, ret;
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int slice_count;
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const uint8_t *slices_hdr = NULL;
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ff_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size);
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/* no supplementary picture */
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if (buf_size == 0) {
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return 0;
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}
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if (!avctx->slice_count) {
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slice_count = (*buf++) + 1;
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buf_size--;
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if (!slice_count || buf_size <= 8 * slice_count) {
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av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n",
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slice_count);
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return AVERROR_INVALIDDATA;
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}
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slices_hdr = buf + 4;
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buf += 8 * slice_count;
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buf_size -= 8 * slice_count;
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} else
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slice_count = avctx->slice_count;
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for (i = 0; i < slice_count; i++) {
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unsigned offset = get_slice_offset(avctx, slices_hdr, i);
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int size, size2;
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if (offset >= buf_size)
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return AVERROR_INVALIDDATA;
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if (i + 1 == slice_count)
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size = buf_size - offset;
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else
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size = get_slice_offset(avctx, slices_hdr, i + 1) - offset;
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if (i + 2 >= slice_count)
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size2 = buf_size - offset;
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else
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size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset;
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if (size <= 0 || size2 <= 0 ||
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offset + FFMAX(size, size2) > buf_size)
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return AVERROR_INVALIDDATA;
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if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2, buf_size)) < 0)
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return ret;
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if (ret > 8 * size)
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i++;
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}
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if (s->current_picture_ptr && s->mb_y >= s->mb_height) {
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ff_er_frame_end(&s->er);
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ff_mpv_frame_end(s);
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if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
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if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0)
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return ret;
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ff_print_debug_info(s, s->current_picture_ptr, pict);
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ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
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} else if (s->last_picture_ptr) {
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if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0)
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return ret;
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ff_print_debug_info(s, s->last_picture_ptr, pict);
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ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
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}
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if (s->last_picture_ptr || s->low_delay) {
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*got_frame = 1;
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}
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// so we can detect if frame_end was not called (find some nicer solution...)
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s->current_picture_ptr = NULL;
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}
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return avpkt->size;
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}
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const AVCodec ff_rv10_decoder = {
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.name = "rv10",
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.long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_RV10,
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.priv_data_size = sizeof(RVDecContext),
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.init = rv10_decode_init,
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.close = rv10_decode_end,
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.decode = rv10_decode_frame,
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.capabilities = AV_CODEC_CAP_DR1,
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.max_lowres = 3,
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.pix_fmts = (const enum AVPixelFormat[]) {
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AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_NONE
|
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},
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};
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const AVCodec ff_rv20_decoder = {
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.name = "rv20",
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.long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_RV20,
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.priv_data_size = sizeof(RVDecContext),
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.init = rv10_decode_init,
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.close = rv10_decode_end,
|
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.decode = rv10_decode_frame,
|
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.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
|
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.flush = ff_mpeg_flush,
|
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.max_lowres = 3,
|
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.pix_fmts = (const enum AVPixelFormat[]) {
|
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AV_PIX_FMT_YUV420P,
|
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AV_PIX_FMT_NONE
|
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},
|
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};
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