forked from KolibriOS/kolibrios
854 lines
29 KiB
C
854 lines
29 KiB
C
/*
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* H.263 decoder
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* Copyright (c) 2001 Fabrice Bellard
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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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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* H.263 decoder.
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*/
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#define UNCHECKED_BITSTREAM_READER 1
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#include "libavutil/cpu.h"
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#include "avcodec.h"
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#include "error_resilience.h"
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#include "flv.h"
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#include "h263.h"
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#include "h263_parser.h"
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#include "internal.h"
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#include "mpeg4video.h"
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#include "mpeg4video_parser.h"
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#include "mpegvideo.h"
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#include "msmpeg4.h"
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#include "vdpau_internal.h"
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#include "thread.h"
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av_cold int ff_h263_decode_init(AVCodecContext *avctx)
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{
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MpegEncContext *s = avctx->priv_data;
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int ret;
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s->avctx = avctx;
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s->out_format = FMT_H263;
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s->width = avctx->coded_width;
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s->height = avctx->coded_height;
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s->workaround_bugs = avctx->workaround_bugs;
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// set defaults
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ff_MPV_decode_defaults(s);
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s->quant_precision = 5;
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s->decode_mb = ff_h263_decode_mb;
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s->low_delay = 1;
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if (avctx->codec->id == AV_CODEC_ID_MSS2)
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avctx->pix_fmt = AV_PIX_FMT_YUV420P;
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else
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avctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);
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s->unrestricted_mv = 1;
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/* select sub codec */
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switch (avctx->codec->id) {
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case AV_CODEC_ID_H263:
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case AV_CODEC_ID_H263P:
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s->unrestricted_mv = 0;
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avctx->chroma_sample_location = AVCHROMA_LOC_CENTER;
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break;
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case AV_CODEC_ID_MPEG4:
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break;
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case AV_CODEC_ID_MSMPEG4V1:
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s->h263_pred = 1;
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s->msmpeg4_version = 1;
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break;
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case AV_CODEC_ID_MSMPEG4V2:
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s->h263_pred = 1;
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s->msmpeg4_version = 2;
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break;
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case AV_CODEC_ID_MSMPEG4V3:
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s->h263_pred = 1;
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s->msmpeg4_version = 3;
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break;
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case AV_CODEC_ID_WMV1:
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s->h263_pred = 1;
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s->msmpeg4_version = 4;
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break;
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case AV_CODEC_ID_WMV2:
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s->h263_pred = 1;
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s->msmpeg4_version = 5;
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break;
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case AV_CODEC_ID_VC1:
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case AV_CODEC_ID_WMV3:
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case AV_CODEC_ID_VC1IMAGE:
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case AV_CODEC_ID_WMV3IMAGE:
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case AV_CODEC_ID_MSS2:
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s->h263_pred = 1;
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s->msmpeg4_version = 6;
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avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
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break;
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case AV_CODEC_ID_H263I:
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break;
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case AV_CODEC_ID_FLV1:
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s->h263_flv = 1;
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break;
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default:
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return AVERROR(EINVAL);
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}
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s->codec_id = avctx->codec->id;
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avctx->hwaccel = ff_find_hwaccel(avctx->codec->id, avctx->pix_fmt);
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if (avctx->stream_codec_tag == AV_RL32("l263") && avctx->extradata_size == 56 && avctx->extradata[0] == 1)
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s->ehc_mode = 1;
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/* for h263, we allocate the images after having read the header */
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if (avctx->codec->id != AV_CODEC_ID_H263 &&
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avctx->codec->id != AV_CODEC_ID_H263P &&
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avctx->codec->id != AV_CODEC_ID_MPEG4)
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if ((ret = ff_MPV_common_init(s)) < 0)
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return ret;
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ff_h263_decode_init_vlc();
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return 0;
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}
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av_cold int ff_h263_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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/**
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* Return the number of bytes consumed for building the current frame.
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*/
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static int get_consumed_bytes(MpegEncContext *s, int buf_size)
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{
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int pos = (get_bits_count(&s->gb) + 7) >> 3;
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if (s->divx_packed || s->avctx->hwaccel) {
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/* We would have to scan through the whole buf to handle the weird
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* reordering ... */
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return buf_size;
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} else if (s->flags & CODEC_FLAG_TRUNCATED) {
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pos -= s->parse_context.last_index;
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// padding is not really read so this might be -1
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if (pos < 0)
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pos = 0;
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return pos;
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} else {
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// avoid infinite loops (maybe not needed...)
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if (pos == 0)
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pos = 1;
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// oops ;)
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if (pos + 10 > buf_size)
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pos = buf_size;
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return pos;
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}
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}
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static int decode_slice(MpegEncContext *s)
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{
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const int part_mask = s->partitioned_frame ? (ER_AC_END | ER_AC_ERROR) : 0x7F;
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const int mb_size = 16 >> s->avctx->lowres;
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int ret;
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s->last_resync_gb = s->gb;
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s->first_slice_line = 1;
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s->resync_mb_x = s->mb_x;
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s->resync_mb_y = s->mb_y;
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ff_set_qscale(s, s->qscale);
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if (s->avctx->hwaccel) {
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const uint8_t *start = s->gb.buffer + get_bits_count(&s->gb) / 8;
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ret = s->avctx->hwaccel->decode_slice(s->avctx, start, s->gb.buffer_end - start);
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// ensure we exit decode loop
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s->mb_y = s->mb_height;
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return ret;
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}
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if (s->partitioned_frame) {
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const int qscale = s->qscale;
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if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4)
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if ((ret = ff_mpeg4_decode_partitions(s)) < 0)
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return ret;
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/* restore variables which were modified */
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s->first_slice_line = 1;
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s->mb_x = s->resync_mb_x;
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s->mb_y = s->resync_mb_y;
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ff_set_qscale(s, qscale);
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}
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for (; s->mb_y < s->mb_height; s->mb_y++) {
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/* per-row end of slice checks */
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if (s->msmpeg4_version) {
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if (s->resync_mb_y + s->slice_height == s->mb_y) {
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ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
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s->mb_x - 1, s->mb_y, ER_MB_END);
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return 0;
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}
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}
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if (s->msmpeg4_version == 1) {
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s->last_dc[0] =
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s->last_dc[1] =
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s->last_dc[2] = 128;
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}
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ff_init_block_index(s);
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for (; s->mb_x < s->mb_width; s->mb_x++) {
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int ret;
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ff_update_block_index(s);
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if (s->resync_mb_x == s->mb_x && s->resync_mb_y + 1 == s->mb_y)
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s->first_slice_line = 0;
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/* DCT & quantize */
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s->mv_dir = MV_DIR_FORWARD;
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s->mv_type = MV_TYPE_16X16;
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// s->mb_skipped = 0;
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av_dlog(s, "%d %d %06X\n",
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ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
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ret = s->decode_mb(s, s->block);
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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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if (ret < 0) {
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const int xy = s->mb_x + s->mb_y * s->mb_stride;
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if (ret == SLICE_END) {
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ff_MPV_decode_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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ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
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s->mb_x, s->mb_y, ER_MB_END & part_mask);
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s->padding_bug_score--;
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if (++s->mb_x >= s->mb_width) {
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s->mb_x = 0;
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ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
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ff_MPV_report_decode_progress(s);
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s->mb_y++;
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}
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return 0;
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} else if (ret == SLICE_NOEND) {
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av_log(s->avctx, AV_LOG_ERROR,
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"Slice mismatch at MB: %d\n", xy);
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ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
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s->mb_x + 1, s->mb_y,
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ER_MB_END & part_mask);
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return AVERROR_INVALIDDATA;
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}
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av_log(s->avctx, AV_LOG_ERROR, "Error at MB: %d\n", xy);
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ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
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s->mb_x, s->mb_y, ER_MB_ERROR & part_mask);
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return AVERROR_INVALIDDATA;
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}
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ff_MPV_decode_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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}
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ff_mpeg_draw_horiz_band(s, s->mb_y * mb_size, mb_size);
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ff_MPV_report_decode_progress(s);
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s->mb_x = 0;
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}
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av_assert1(s->mb_x == 0 && s->mb_y == s->mb_height);
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if (s->codec_id == AV_CODEC_ID_MPEG4 &&
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(s->workaround_bugs & FF_BUG_AUTODETECT) &&
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get_bits_left(&s->gb) >= 48 &&
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show_bits(&s->gb, 24) == 0x4010 &&
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!s->data_partitioning)
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s->padding_bug_score += 32;
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/* try to detect the padding bug */
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if (s->codec_id == AV_CODEC_ID_MPEG4 &&
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(s->workaround_bugs & FF_BUG_AUTODETECT) &&
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get_bits_left(&s->gb) >= 0 &&
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get_bits_left(&s->gb) < 137 &&
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// !s->resync_marker &&
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!s->data_partitioning) {
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const int bits_count = get_bits_count(&s->gb);
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const int bits_left = s->gb.size_in_bits - bits_count;
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if (bits_left == 0) {
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s->padding_bug_score += 16;
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} else if (bits_left != 1) {
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int v = show_bits(&s->gb, 8);
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v |= 0x7F >> (7 - (bits_count & 7));
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if (v == 0x7F && bits_left <= 8)
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s->padding_bug_score--;
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else if (v == 0x7F && ((get_bits_count(&s->gb) + 8) & 8) &&
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bits_left <= 16)
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s->padding_bug_score += 4;
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else
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s->padding_bug_score++;
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}
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}
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if (s->workaround_bugs & FF_BUG_AUTODETECT) {
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if (s->padding_bug_score > -2 && !s->data_partitioning
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/* && (s->divx_version >= 0 || !s->resync_marker) */)
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s->workaround_bugs |= FF_BUG_NO_PADDING;
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else
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s->workaround_bugs &= ~FF_BUG_NO_PADDING;
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}
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// handle formats which don't have unique end markers
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if (s->msmpeg4_version || (s->workaround_bugs & FF_BUG_NO_PADDING)) { // FIXME perhaps solve this more cleanly
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int left = get_bits_left(&s->gb);
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int max_extra = 7;
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/* no markers in M$ crap */
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if (s->msmpeg4_version && s->pict_type == AV_PICTURE_TYPE_I)
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max_extra += 17;
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/* buggy padding but the frame should still end approximately at
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* the bitstream end */
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if ((s->workaround_bugs & FF_BUG_NO_PADDING) &&
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(s->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE)))
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max_extra += 48;
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else if ((s->workaround_bugs & FF_BUG_NO_PADDING))
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max_extra += 256 * 256 * 256 * 64;
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if (left > max_extra)
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av_log(s->avctx, AV_LOG_ERROR,
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"discarding %d junk bits at end, next would be %X\n",
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left, show_bits(&s->gb, 24));
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else if (left < 0)
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av_log(s->avctx, AV_LOG_ERROR, "overreading %d bits\n", -left);
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else
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ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y,
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s->mb_x - 1, s->mb_y, ER_MB_END);
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return 0;
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}
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av_log(s->avctx, AV_LOG_ERROR,
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"slice end not reached but screenspace end (%d left %06X, score= %d)\n",
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get_bits_left(&s->gb), show_bits(&s->gb, 24), s->padding_bug_score);
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ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y,
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ER_MB_END & part_mask);
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return AVERROR_INVALIDDATA;
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}
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int ff_h263_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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int ret;
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AVFrame *pict = data;
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s->flags = avctx->flags;
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s->flags2 = avctx->flags2;
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/* no supplementary picture */
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if (buf_size == 0) {
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/* special case for last picture */
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if (s->low_delay == 0 && s->next_picture_ptr) {
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if ((ret = av_frame_ref(pict, &s->next_picture_ptr->f)) < 0)
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return ret;
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s->next_picture_ptr = NULL;
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*got_frame = 1;
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}
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return 0;
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}
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if (s->flags & CODEC_FLAG_TRUNCATED) {
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int next;
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if (CONFIG_MPEG4_DECODER && s->codec_id == AV_CODEC_ID_MPEG4) {
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next = ff_mpeg4_find_frame_end(&s->parse_context, buf, buf_size);
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} else if (CONFIG_H263_DECODER && s->codec_id == AV_CODEC_ID_H263) {
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next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
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} else if (CONFIG_H263P_DECODER && s->codec_id == AV_CODEC_ID_H263P) {
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next = ff_h263_find_frame_end(&s->parse_context, buf, buf_size);
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} else {
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av_log(s->avctx, AV_LOG_ERROR,
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"this codec does not support truncated bitstreams\n");
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return AVERROR(EINVAL);
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}
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if (ff_combine_frame(&s->parse_context, next, (const uint8_t **)&buf,
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&buf_size) < 0)
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return buf_size;
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}
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retry:
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if (s->divx_packed && s->bitstream_buffer_size) {
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int i;
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for(i=0; i < buf_size-3; i++) {
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if (buf[i]==0 && buf[i+1]==0 && buf[i+2]==1) {
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if (buf[i+3]==0xB0) {
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av_log(s->avctx, AV_LOG_WARNING, "Discarding excessive bitstream in packed xvid\n");
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s->bitstream_buffer_size = 0;
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}
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break;
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}
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}
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}
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if (s->bitstream_buffer_size && (s->divx_packed || buf_size < 20)) // divx 5.01+/xvid frame reorder
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ret = init_get_bits8(&s->gb, s->bitstream_buffer, s->bitstream_buffer_size);
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else
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ret = init_get_bits8(&s->gb, buf, buf_size);
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s->bitstream_buffer_size = 0;
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if (ret < 0)
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return ret;
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if (!s->context_initialized)
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if ((ret = ff_MPV_common_init(s)) < 0) // we need the idct permutaton for reading a custom matrix
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return ret;
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/* We need to set current_picture_ptr before reading the header,
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* otherwise we cannot store anyting in there */
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if (s->current_picture_ptr == NULL || s->current_picture_ptr->f.data[0]) {
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int i = ff_find_unused_picture(s, 0);
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if (i < 0)
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return i;
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s->current_picture_ptr = &s->picture[i];
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}
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/* let's go :-) */
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if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
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ret = ff_wmv2_decode_picture_header(s);
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} else if (CONFIG_MSMPEG4_DECODER && s->msmpeg4_version) {
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ret = ff_msmpeg4_decode_picture_header(s);
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} else if (CONFIG_MPEG4_DECODER && s->h263_pred) {
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if (s->avctx->extradata_size && s->picture_number == 0) {
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GetBitContext gb;
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if (init_get_bits8(&gb, s->avctx->extradata, s->avctx->extradata_size) >= 0 )
|
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ret = ff_mpeg4_decode_picture_header(s, &gb);
|
|
}
|
|
ret = ff_mpeg4_decode_picture_header(s, &s->gb);
|
|
} else if (CONFIG_H263I_DECODER && s->codec_id == AV_CODEC_ID_H263I) {
|
|
ret = ff_intel_h263_decode_picture_header(s);
|
|
} else if (CONFIG_FLV_DECODER && s->h263_flv) {
|
|
ret = ff_flv_decode_picture_header(s);
|
|
} else {
|
|
ret = ff_h263_decode_picture_header(s);
|
|
}
|
|
|
|
if (ret < 0 || ret == FRAME_SKIPPED) {
|
|
if ( s->width != avctx->coded_width
|
|
|| s->height != avctx->coded_height) {
|
|
av_log(s->avctx, AV_LOG_WARNING, "Reverting picture dimensions change due to header decoding failure\n");
|
|
s->width = avctx->coded_width;
|
|
s->height= avctx->coded_height;
|
|
}
|
|
}
|
|
if (ret == FRAME_SKIPPED)
|
|
return get_consumed_bytes(s, buf_size);
|
|
|
|
/* skip if the header was thrashed */
|
|
if (ret < 0) {
|
|
av_log(s->avctx, AV_LOG_ERROR, "header damaged\n");
|
|
return ret;
|
|
}
|
|
|
|
avctx->has_b_frames = !s->low_delay;
|
|
|
|
if (s->xvid_build == -1 && s->divx_version == -1 && s->lavc_build == -1) {
|
|
if (s->stream_codec_tag == AV_RL32("XVID") ||
|
|
s->codec_tag == AV_RL32("XVID") ||
|
|
s->codec_tag == AV_RL32("XVIX") ||
|
|
s->codec_tag == AV_RL32("RMP4") ||
|
|
s->codec_tag == AV_RL32("ZMP4") ||
|
|
s->codec_tag == AV_RL32("SIPP"))
|
|
s->xvid_build = 0;
|
|
#if 0
|
|
if (s->codec_tag == AV_RL32("DIVX") && s->vo_type == 0 &&
|
|
s->vol_control_parameters == 1 &&
|
|
s->padding_bug_score > 0 && s->low_delay) // XVID with modified fourcc
|
|
s->xvid_build = 0;
|
|
#endif
|
|
}
|
|
|
|
if (s->xvid_build == -1 && s->divx_version == -1 && s->lavc_build == -1)
|
|
if (s->codec_tag == AV_RL32("DIVX") && s->vo_type == 0 &&
|
|
s->vol_control_parameters == 0)
|
|
s->divx_version = 400; // divx 4
|
|
|
|
if (s->xvid_build >= 0 && s->divx_version >= 0) {
|
|
s->divx_version =
|
|
s->divx_build = -1;
|
|
}
|
|
|
|
if (s->workaround_bugs & FF_BUG_AUTODETECT) {
|
|
if (s->codec_tag == AV_RL32("XVIX"))
|
|
s->workaround_bugs |= FF_BUG_XVID_ILACE;
|
|
|
|
if (s->codec_tag == AV_RL32("UMP4"))
|
|
s->workaround_bugs |= FF_BUG_UMP4;
|
|
|
|
if (s->divx_version >= 500 && s->divx_build < 1814)
|
|
s->workaround_bugs |= FF_BUG_QPEL_CHROMA;
|
|
|
|
if (s->divx_version > 502 && s->divx_build < 1814)
|
|
s->workaround_bugs |= FF_BUG_QPEL_CHROMA2;
|
|
|
|
if (s->xvid_build <= 3U)
|
|
s->padding_bug_score = 256 * 256 * 256 * 64;
|
|
|
|
if (s->xvid_build <= 1U)
|
|
s->workaround_bugs |= FF_BUG_QPEL_CHROMA;
|
|
|
|
if (s->xvid_build <= 12U)
|
|
s->workaround_bugs |= FF_BUG_EDGE;
|
|
|
|
if (s->xvid_build <= 32U)
|
|
s->workaround_bugs |= FF_BUG_DC_CLIP;
|
|
|
|
#define SET_QPEL_FUNC(postfix1, postfix2) \
|
|
s->dsp.put_ ## postfix1 = ff_put_ ## postfix2; \
|
|
s->dsp.put_no_rnd_ ## postfix1 = ff_put_no_rnd_ ## postfix2; \
|
|
s->dsp.avg_ ## postfix1 = ff_avg_ ## postfix2;
|
|
|
|
if (s->lavc_build < 4653U)
|
|
s->workaround_bugs |= FF_BUG_STD_QPEL;
|
|
|
|
if (s->lavc_build < 4655U)
|
|
s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE;
|
|
|
|
if (s->lavc_build < 4670U)
|
|
s->workaround_bugs |= FF_BUG_EDGE;
|
|
|
|
if (s->lavc_build <= 4712U)
|
|
s->workaround_bugs |= FF_BUG_DC_CLIP;
|
|
|
|
if (s->divx_version >= 0)
|
|
s->workaround_bugs |= FF_BUG_DIRECT_BLOCKSIZE;
|
|
if (s->divx_version == 501 && s->divx_build == 20020416)
|
|
s->padding_bug_score = 256 * 256 * 256 * 64;
|
|
|
|
if (s->divx_version < 500U)
|
|
s->workaround_bugs |= FF_BUG_EDGE;
|
|
|
|
if (s->divx_version >= 0)
|
|
s->workaround_bugs |= FF_BUG_HPEL_CHROMA;
|
|
#if 0
|
|
if (s->divx_version == 500)
|
|
s->padding_bug_score = 256 * 256 * 256 * 64;
|
|
|
|
/* very ugly XVID padding bug detection FIXME/XXX solve this differently
|
|
* Let us hope this at least works. */
|
|
if (s->resync_marker == 0 && s->data_partitioning == 0 &&
|
|
s->divx_version == -1 && s->codec_id == AV_CODEC_ID_MPEG4 &&
|
|
s->vo_type == 0)
|
|
s->workaround_bugs |= FF_BUG_NO_PADDING;
|
|
|
|
// FIXME not sure about the version num but a 4609 file seems ok
|
|
if (s->lavc_build < 4609U)
|
|
s->workaround_bugs |= FF_BUG_NO_PADDING;
|
|
#endif
|
|
}
|
|
|
|
if (s->workaround_bugs & FF_BUG_STD_QPEL) {
|
|
SET_QPEL_FUNC(qpel_pixels_tab[0][5], qpel16_mc11_old_c)
|
|
SET_QPEL_FUNC(qpel_pixels_tab[0][7], qpel16_mc31_old_c)
|
|
SET_QPEL_FUNC(qpel_pixels_tab[0][9], qpel16_mc12_old_c)
|
|
SET_QPEL_FUNC(qpel_pixels_tab[0][11], qpel16_mc32_old_c)
|
|
SET_QPEL_FUNC(qpel_pixels_tab[0][13], qpel16_mc13_old_c)
|
|
SET_QPEL_FUNC(qpel_pixels_tab[0][15], qpel16_mc33_old_c)
|
|
|
|
SET_QPEL_FUNC(qpel_pixels_tab[1][5], qpel8_mc11_old_c)
|
|
SET_QPEL_FUNC(qpel_pixels_tab[1][7], qpel8_mc31_old_c)
|
|
SET_QPEL_FUNC(qpel_pixels_tab[1][9], qpel8_mc12_old_c)
|
|
SET_QPEL_FUNC(qpel_pixels_tab[1][11], qpel8_mc32_old_c)
|
|
SET_QPEL_FUNC(qpel_pixels_tab[1][13], qpel8_mc13_old_c)
|
|
SET_QPEL_FUNC(qpel_pixels_tab[1][15], qpel8_mc33_old_c)
|
|
}
|
|
|
|
if (avctx->debug & FF_DEBUG_BUGS)
|
|
av_log(s->avctx, AV_LOG_DEBUG,
|
|
"bugs: %X lavc_build:%d xvid_build:%d divx_version:%d divx_build:%d %s\n",
|
|
s->workaround_bugs, s->lavc_build, s->xvid_build,
|
|
s->divx_version, s->divx_build, s->divx_packed ? "p" : "");
|
|
|
|
#if HAVE_MMX
|
|
if (s->codec_id == AV_CODEC_ID_MPEG4 && s->xvid_build >= 0 &&
|
|
avctx->idct_algo == FF_IDCT_AUTO &&
|
|
(av_get_cpu_flags() & AV_CPU_FLAG_MMX)) {
|
|
avctx->idct_algo = FF_IDCT_XVIDMMX;
|
|
ff_dct_common_init(s);
|
|
goto retry;
|
|
}
|
|
#endif
|
|
|
|
/* After H263 & mpeg4 header decode we have the height, width,
|
|
* and other parameters. So then we could init the picture.
|
|
* FIXME: By the way H263 decoder is evolving it should have
|
|
* an H263EncContext */
|
|
if (s->width != avctx->coded_width ||
|
|
s->height != avctx->coded_height ||
|
|
s->context_reinit) {
|
|
/* H.263 could change picture size any time */
|
|
s->context_reinit = 0;
|
|
|
|
avcodec_set_dimensions(avctx, s->width, s->height);
|
|
|
|
if ((ret = ff_MPV_common_frame_size_change(s)))
|
|
return ret;
|
|
}
|
|
|
|
if (s->codec_id == AV_CODEC_ID_H263 ||
|
|
s->codec_id == AV_CODEC_ID_H263P ||
|
|
s->codec_id == AV_CODEC_ID_H263I)
|
|
s->gob_index = ff_h263_get_gob_height(s);
|
|
|
|
// for skipping the frame
|
|
s->current_picture.f.pict_type = s->pict_type;
|
|
s->current_picture.f.key_frame = s->pict_type == AV_PICTURE_TYPE_I;
|
|
|
|
/* skip B-frames if we don't have reference frames */
|
|
if (s->last_picture_ptr == NULL &&
|
|
(s->pict_type == AV_PICTURE_TYPE_B || s->droppable))
|
|
return get_consumed_bytes(s, buf_size);
|
|
if ((avctx->skip_frame >= AVDISCARD_NONREF &&
|
|
s->pict_type == AV_PICTURE_TYPE_B) ||
|
|
(avctx->skip_frame >= AVDISCARD_NONKEY &&
|
|
s->pict_type != AV_PICTURE_TYPE_I) ||
|
|
avctx->skip_frame >= AVDISCARD_ALL)
|
|
return get_consumed_bytes(s, buf_size);
|
|
|
|
if (s->next_p_frame_damaged) {
|
|
if (s->pict_type == AV_PICTURE_TYPE_B)
|
|
return get_consumed_bytes(s, buf_size);
|
|
else
|
|
s->next_p_frame_damaged = 0;
|
|
}
|
|
|
|
if ((!s->no_rounding) || s->pict_type == AV_PICTURE_TYPE_B) {
|
|
s->me.qpel_put = s->dsp.put_qpel_pixels_tab;
|
|
s->me.qpel_avg = s->dsp.avg_qpel_pixels_tab;
|
|
} else {
|
|
s->me.qpel_put = s->dsp.put_no_rnd_qpel_pixels_tab;
|
|
s->me.qpel_avg = s->dsp.avg_qpel_pixels_tab;
|
|
}
|
|
|
|
if ((ret = ff_MPV_frame_start(s, avctx)) < 0)
|
|
return ret;
|
|
|
|
if (!s->divx_packed && !avctx->hwaccel)
|
|
ff_thread_finish_setup(avctx);
|
|
|
|
if (CONFIG_MPEG4_VDPAU_DECODER && (s->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)) {
|
|
ff_vdpau_mpeg4_decode_picture(s, s->gb.buffer, s->gb.buffer_end - s->gb.buffer);
|
|
goto frame_end;
|
|
}
|
|
|
|
if (avctx->hwaccel)
|
|
if ((ret = avctx->hwaccel->start_frame(avctx, s->gb.buffer,
|
|
s->gb.buffer_end - s->gb.buffer)) < 0)
|
|
return ret;
|
|
|
|
ff_mpeg_er_frame_start(s);
|
|
|
|
/* the second part of the wmv2 header contains the MB skip bits which
|
|
* are stored in current_picture->mb_type which is not available before
|
|
* ff_MPV_frame_start() */
|
|
if (CONFIG_WMV2_DECODER && s->msmpeg4_version == 5) {
|
|
ret = ff_wmv2_decode_secondary_picture_header(s);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret == 1)
|
|
goto frame_end;
|
|
}
|
|
|
|
/* decode each macroblock */
|
|
s->mb_x = 0;
|
|
s->mb_y = 0;
|
|
|
|
ret = decode_slice(s);
|
|
while (s->mb_y < s->mb_height) {
|
|
if (s->msmpeg4_version) {
|
|
if (s->slice_height == 0 || s->mb_x != 0 ||
|
|
(s->mb_y % s->slice_height) != 0 || get_bits_left(&s->gb) < 0)
|
|
break;
|
|
} else {
|
|
int prev_x = s->mb_x, prev_y = s->mb_y;
|
|
if (ff_h263_resync(s) < 0)
|
|
break;
|
|
if (prev_y * s->mb_width + prev_x < s->mb_y * s->mb_width + s->mb_x)
|
|
s->er.error_occurred = 1;
|
|
}
|
|
|
|
if (s->msmpeg4_version < 4 && s->h263_pred)
|
|
ff_mpeg4_clean_buffers(s);
|
|
|
|
if (decode_slice(s) < 0)
|
|
ret = AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (s->msmpeg4_version && s->msmpeg4_version < 4 &&
|
|
s->pict_type == AV_PICTURE_TYPE_I)
|
|
if (!CONFIG_MSMPEG4_DECODER ||
|
|
ff_msmpeg4_decode_ext_header(s, buf_size) < 0)
|
|
s->er.error_status_table[s->mb_num - 1] = ER_MB_ERROR;
|
|
|
|
av_assert1(s->bitstream_buffer_size == 0);
|
|
frame_end:
|
|
ff_er_frame_end(&s->er);
|
|
|
|
if (avctx->hwaccel)
|
|
if ((ret = avctx->hwaccel->end_frame(avctx)) < 0)
|
|
return ret;
|
|
|
|
ff_MPV_frame_end(s);
|
|
|
|
/* divx 5.01+ bitstream reorder stuff */
|
|
/* Since this clobbers the input buffer and hwaccel codecs still need the
|
|
* data during hwaccel->end_frame we should not do this any earlier */
|
|
if (s->codec_id == AV_CODEC_ID_MPEG4 && s->divx_packed) {
|
|
int current_pos = s->gb.buffer == s->bitstream_buffer ? 0 : (get_bits_count(&s->gb) >> 3);
|
|
int startcode_found = 0;
|
|
|
|
if (buf_size - current_pos > 7) {
|
|
int i;
|
|
for (i = current_pos; i < buf_size - 4; i++)
|
|
if (buf[i] == 0 &&
|
|
buf[i + 1] == 0 &&
|
|
buf[i + 2] == 1 &&
|
|
buf[i + 3] == 0xB6) {
|
|
startcode_found = !(buf[i + 4] & 0x40);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (startcode_found) {
|
|
av_fast_malloc(&s->bitstream_buffer,
|
|
&s->allocated_bitstream_buffer_size,
|
|
buf_size - current_pos +
|
|
FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!s->bitstream_buffer)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(s->bitstream_buffer, buf + current_pos,
|
|
buf_size - current_pos);
|
|
s->bitstream_buffer_size = buf_size - current_pos;
|
|
}
|
|
}
|
|
|
|
if (!s->divx_packed && avctx->hwaccel)
|
|
ff_thread_finish_setup(avctx);
|
|
|
|
av_assert1(s->current_picture.f.pict_type == s->current_picture_ptr->f.pict_type);
|
|
av_assert1(s->current_picture.f.pict_type == s->pict_type);
|
|
if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) {
|
|
if ((ret = av_frame_ref(pict, &s->current_picture_ptr->f)) < 0)
|
|
return ret;
|
|
ff_print_debug_info(s, s->current_picture_ptr, pict);
|
|
ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1);
|
|
} else if (s->last_picture_ptr != NULL) {
|
|
if ((ret = av_frame_ref(pict, &s->last_picture_ptr->f)) < 0)
|
|
return ret;
|
|
ff_print_debug_info(s, s->last_picture_ptr, pict);
|
|
ff_mpv_export_qp_table(s, pict, s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1);
|
|
}
|
|
|
|
if (s->last_picture_ptr || s->low_delay) {
|
|
if ( pict->format == AV_PIX_FMT_YUV420P
|
|
&& (s->codec_tag == AV_RL32("GEOV") || s->codec_tag == AV_RL32("GEOX"))) {
|
|
int x, y, p;
|
|
av_frame_make_writable(pict);
|
|
for (p=0; p<3; p++) {
|
|
int w = FF_CEIL_RSHIFT(pict-> width, !!p);
|
|
int h = FF_CEIL_RSHIFT(pict->height, !!p);
|
|
int linesize = pict->linesize[p];
|
|
for (y=0; y<(h>>1); y++)
|
|
for (x=0; x<w; x++)
|
|
FFSWAP(int,
|
|
pict->data[p][x + y*linesize],
|
|
pict->data[p][x + (h-1-y)*linesize]);
|
|
}
|
|
}
|
|
*got_frame = 1;
|
|
}
|
|
|
|
if (ret && (avctx->err_recognition & AV_EF_EXPLODE))
|
|
return ret;
|
|
else
|
|
return get_consumed_bytes(s, buf_size);
|
|
}
|
|
|
|
const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[] = {
|
|
#if CONFIG_VAAPI
|
|
AV_PIX_FMT_VAAPI_VLD,
|
|
#endif
|
|
#if CONFIG_VDPAU
|
|
AV_PIX_FMT_VDPAU,
|
|
#endif
|
|
AV_PIX_FMT_YUV420P,
|
|
AV_PIX_FMT_NONE
|
|
};
|
|
|
|
AVCodec ff_h263_decoder = {
|
|
.name = "h263",
|
|
.long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_H263,
|
|
.priv_data_size = sizeof(MpegEncContext),
|
|
.init = ff_h263_decode_init,
|
|
.close = ff_h263_decode_end,
|
|
.decode = ff_h263_decode_frame,
|
|
.capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
|
|
CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
|
|
.flush = ff_mpeg_flush,
|
|
.max_lowres = 3,
|
|
.pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
|
|
};
|
|
|
|
AVCodec ff_h263p_decoder = {
|
|
.name = "h263p",
|
|
.long_name = NULL_IF_CONFIG_SMALL("H.263 / H.263-1996, H.263+ / H.263-1998 / H.263 version 2"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_H263P,
|
|
.priv_data_size = sizeof(MpegEncContext),
|
|
.init = ff_h263_decode_init,
|
|
.close = ff_h263_decode_end,
|
|
.decode = ff_h263_decode_frame,
|
|
.capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
|
|
CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY,
|
|
.flush = ff_mpeg_flush,
|
|
.max_lowres = 3,
|
|
.pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
|
|
};
|