2007-05-10 22:26:44 +00:00
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/*
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* H.26L/H.264/AVC/JVT/14496-10/... parser
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* Copyright (c) 2003 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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2010-04-20 14:45:34 +00:00
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* @file
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2007-05-10 22:26:44 +00:00
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* H.264 / AVC / MPEG4 part10 parser.
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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2011-12-18 02:17:44 +00:00
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#define UNCHECKED_BITSTREAM_READER 1
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2013-02-01 09:31:59 +00:00
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#include "libavutil/attributes.h"
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2007-05-10 22:26:44 +00:00
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#include "parser.h"
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2009-02-21 19:56:50 +00:00
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#include "h264data.h"
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#include "golomb.h"
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2013-03-25 12:11:41 +00:00
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#include "internal.h"
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2014-02-28 12:40:54 +00:00
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#include "mpegutils.h"
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2007-05-10 22:26:44 +00:00
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2015-01-17 16:30:46 +00:00
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typedef struct H264ParseContext {
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H264Context h;
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ParseContext pc;
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int got_first;
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} H264ParseContext;
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2007-05-10 22:26:44 +00:00
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2015-01-17 16:30:46 +00:00
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static int h264_find_frame_end(H264ParseContext *p, const uint8_t *buf,
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2013-06-06 06:02:50 +00:00
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int buf_size)
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2007-05-10 22:26:44 +00:00
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{
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2015-01-17 16:30:46 +00:00
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H264Context *h = &p->h;
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2011-10-03 18:25:43 +00:00
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int i, j;
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2007-05-10 22:26:44 +00:00
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uint32_t state;
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2015-01-17 16:30:46 +00:00
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ParseContext *pc = &p->pc;
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2011-10-03 18:25:43 +00:00
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2015-01-27 14:08:17 +00:00
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int next_avc= h->is_avc ? 0 : buf_size;
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2007-05-10 22:26:44 +00:00
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// mb_addr= pc->mb_addr - 1;
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2013-06-06 06:02:50 +00:00
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state = pc->state;
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if (state > 13)
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state = 7;
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2007-05-10 22:26:44 +00:00
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2013-06-08 08:50:24 +00:00
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if (h->is_avc && !h->nal_length_size)
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2013-02-16 20:14:00 +00:00
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av_log(h->avctx, AV_LOG_ERROR, "AVC-parser: nal length size invalid\n");
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2011-10-03 18:25:43 +00:00
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2013-06-06 06:02:50 +00:00
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for (i = 0; i < buf_size; i++) {
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2013-06-08 08:50:24 +00:00
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if (i >= next_avc) {
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2011-10-03 18:25:43 +00:00
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int nalsize = 0;
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i = next_avc;
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2013-06-08 08:50:24 +00:00
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for (j = 0; j < h->nal_length_size; j++)
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2011-10-03 18:25:43 +00:00
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nalsize = (nalsize << 8) | buf[i++];
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2013-06-08 08:50:24 +00:00
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if (nalsize <= 0 || nalsize > buf_size - i) {
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2013-02-16 20:14:00 +00:00
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av_log(h->avctx, AV_LOG_ERROR, "AVC-parser: nal size %d remaining %d\n", nalsize, buf_size - i);
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2011-10-03 18:25:43 +00:00
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return buf_size;
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}
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2013-06-08 08:50:24 +00:00
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next_avc = i + nalsize;
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state = 5;
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2011-10-03 18:25:43 +00:00
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}
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2013-06-06 06:02:50 +00:00
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if (state == 7) {
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2014-08-05 10:45:30 +00:00
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i += h->h264dsp.startcode_find_candidate(buf + i, next_avc - i);
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2013-08-08 10:38:10 +00:00
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if (i < next_avc)
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2013-08-05 12:12:47 +00:00
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state = 2;
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2013-06-06 06:02:50 +00:00
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} else if (state <= 2) {
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if (buf[i] == 1)
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state ^= 5; // 2->7, 1->4, 0->5
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else if (buf[i])
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state = 7;
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else
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state >>= 1; // 2->1, 1->0, 0->0
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} else if (state <= 5) {
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2014-02-14 04:20:02 +00:00
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int nalu_type = buf[i] & 0x1F;
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if (nalu_type == NAL_SEI || nalu_type == NAL_SPS ||
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nalu_type == NAL_PPS || nalu_type == NAL_AUD) {
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2013-06-06 06:02:50 +00:00
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if (pc->frame_start_found) {
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2007-05-10 22:26:44 +00:00
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i++;
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2008-10-02 19:24:26 +00:00
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goto found;
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2007-05-10 22:26:44 +00:00
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}
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2014-02-14 04:20:02 +00:00
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} else if (nalu_type == NAL_SLICE || nalu_type == NAL_DPA ||
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nalu_type == NAL_IDR_SLICE) {
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2013-06-08 08:50:24 +00:00
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state += 8;
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2011-10-27 15:53:29 +00:00
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continue;
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}
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2013-06-08 08:50:24 +00:00
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state = 7;
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} else {
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2011-10-27 15:53:29 +00:00
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h->parse_history[h->parse_history_count++]= buf[i];
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2014-07-31 14:25:21 +00:00
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if (h->parse_history_count>5) {
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2011-10-27 15:53:29 +00:00
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unsigned int mb, last_mb= h->parse_last_mb;
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GetBitContext gb;
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init_get_bits(&gb, h->parse_history, 8*h->parse_history_count);
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h->parse_history_count=0;
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mb= get_ue_golomb_long(&gb);
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h->parse_last_mb= mb;
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2013-06-06 06:02:50 +00:00
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if (pc->frame_start_found) {
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2013-06-08 08:50:24 +00:00
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if (mb <= last_mb)
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2011-10-27 15:53:29 +00:00
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goto found;
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2013-06-06 06:02:50 +00:00
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} else
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2007-05-10 22:26:44 +00:00
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pc->frame_start_found = 1;
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2013-06-08 08:50:24 +00:00
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state = 7;
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2007-05-10 22:26:44 +00:00
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}
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}
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}
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2013-06-06 06:02:50 +00:00
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pc->state = state;
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2013-06-08 08:50:24 +00:00
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if (h->is_avc)
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2011-10-03 18:25:43 +00:00
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return next_avc;
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2007-05-10 22:26:44 +00:00
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return END_NOT_FOUND;
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2008-10-02 19:24:26 +00:00
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found:
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2013-06-06 06:02:50 +00:00
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pc->state = 7;
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pc->frame_start_found = 0;
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2013-06-08 08:50:24 +00:00
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if (h->is_avc)
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2011-10-03 18:25:43 +00:00
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return next_avc;
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2014-07-31 14:25:21 +00:00
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return i - (state & 5) - 5 * (state > 7);
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2007-05-10 22:26:44 +00:00
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}
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2013-09-24 09:30:50 +00:00
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static int scan_mmco_reset(AVCodecParserContext *s)
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{
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2015-01-17 16:30:46 +00:00
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H264ParseContext *p = s->priv_data;
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H264Context *h = &p->h;
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2015-01-17 17:45:29 +00:00
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H264SliceContext *sl = &h->slice_ctx[0];
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2013-09-24 09:30:50 +00:00
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2015-01-17 21:28:46 +00:00
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sl->slice_type_nos = s->pict_type & 3;
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2013-09-24 09:30:50 +00:00
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if (h->pps.redundant_pic_cnt_present)
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2015-01-27 13:39:06 +00:00
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get_ue_golomb(&sl->gb); // redundant_pic_count
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2013-09-24 09:30:50 +00:00
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2015-01-17 21:28:46 +00:00
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if (ff_set_ref_count(h, sl) < 0)
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2013-09-24 09:30:50 +00:00
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return AVERROR_INVALIDDATA;
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2015-01-17 21:28:46 +00:00
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if (sl->slice_type_nos != AV_PICTURE_TYPE_I) {
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2013-09-24 09:30:50 +00:00
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int list;
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2015-01-17 21:28:46 +00:00
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for (list = 0; list < sl->list_count; list++) {
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2015-01-27 13:39:06 +00:00
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if (get_bits1(&sl->gb)) {
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2013-09-24 09:30:50 +00:00
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int index;
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for (index = 0; ; index++) {
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2015-01-27 13:39:06 +00:00
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unsigned int reordering_of_pic_nums_idc = get_ue_golomb_31(&sl->gb);
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2013-09-24 09:30:50 +00:00
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if (reordering_of_pic_nums_idc < 3)
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2015-12-29 07:04:08 +00:00
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get_ue_golomb_long(&sl->gb);
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2013-09-24 09:30:50 +00:00
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else if (reordering_of_pic_nums_idc > 3) {
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av_log(h->avctx, AV_LOG_ERROR,
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"illegal reordering_of_pic_nums_idc %d\n",
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reordering_of_pic_nums_idc);
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return AVERROR_INVALIDDATA;
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} else
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break;
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2015-01-17 21:28:46 +00:00
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if (index >= sl->ref_count[list]) {
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2014-02-12 23:30:12 +00:00
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av_log(h->avctx, AV_LOG_ERROR,
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"reference count %d overflow\n", index);
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2013-09-24 09:30:50 +00:00
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return AVERROR_INVALIDDATA;
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}
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}
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}
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}
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}
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|
2015-01-17 21:28:46 +00:00
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if ((h->pps.weighted_pred && sl->slice_type_nos == AV_PICTURE_TYPE_P) ||
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(h->pps.weighted_bipred_idc == 1 && sl->slice_type_nos == AV_PICTURE_TYPE_B))
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2015-01-17 17:45:29 +00:00
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ff_pred_weight_table(h, sl);
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2013-09-24 09:30:50 +00:00
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2015-01-27 13:39:06 +00:00
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if (get_bits1(&sl->gb)) { // adaptive_ref_pic_marking_mode_flag
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2013-09-24 09:30:50 +00:00
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int i;
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for (i = 0; i < MAX_MMCO_COUNT; i++) {
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2015-01-27 13:39:06 +00:00
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MMCOOpcode opcode = get_ue_golomb_31(&sl->gb);
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2013-09-24 09:30:50 +00:00
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if (opcode > (unsigned) MMCO_LONG) {
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av_log(h->avctx, AV_LOG_ERROR,
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"illegal memory management control operation %d\n",
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opcode);
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return AVERROR_INVALIDDATA;
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|
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}
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if (opcode == MMCO_END)
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return 0;
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else if (opcode == MMCO_RESET)
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return 1;
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if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG)
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2015-12-29 07:04:08 +00:00
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get_ue_golomb_long(&sl->gb); // difference_of_pic_nums_minus1
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2013-09-24 09:30:50 +00:00
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if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED ||
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opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG)
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2015-01-27 13:39:06 +00:00
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get_ue_golomb_31(&sl->gb);
|
2013-09-24 09:30:50 +00:00
|
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}
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}
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return 0;
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}
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|
2011-06-23 20:41:54 +00:00
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/**
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2009-02-21 19:56:50 +00:00
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* Parse NAL units of found picture and decode some basic information.
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*
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* @param s parser context.
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* @param avctx codec context.
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* @param buf buffer with field/frame data.
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* @param buf_size size of the buffer.
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*/
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static inline int parse_nal_units(AVCodecParserContext *s,
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AVCodecContext *avctx,
|
2014-10-27 03:30:11 +00:00
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const uint8_t * const buf, int buf_size)
|
2009-02-21 19:56:50 +00:00
|
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{
|
2015-01-17 16:30:46 +00:00
|
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H264ParseContext *p = s->priv_data;
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H264Context *h = &p->h;
|
2015-01-27 13:39:06 +00:00
|
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H264SliceContext *sl = &h->slice_ctx[0];
|
2014-10-27 03:30:11 +00:00
|
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int buf_index, next_avc;
|
2009-02-21 20:03:05 +00:00
|
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unsigned int pps_id;
|
2009-02-21 19:56:50 +00:00
|
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unsigned int slice_type;
|
2013-09-24 09:30:50 +00:00
|
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int state = -1, got_reset = 0;
|
2009-02-21 19:56:50 +00:00
|
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const uint8_t *ptr;
|
2011-12-03 02:31:24 +00:00
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int q264 = buf_size >=4 && !memcmp("Q264", buf, 4);
|
2013-05-14 22:37:36 +00:00
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int field_poc[2];
|
2009-02-21 19:56:50 +00:00
|
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|
|
|
|
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/* set some sane default values */
|
2013-06-06 06:02:50 +00:00
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s->pict_type = AV_PICTURE_TYPE_I;
|
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|
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s->key_frame = 0;
|
2013-05-14 22:37:36 +00:00
|
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|
s->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
|
2009-02-21 19:56:50 +00:00
|
|
|
|
2013-10-14 19:22:42 +00:00
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|
h->avctx = avctx;
|
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|
|
ff_h264_reset_sei(h);
|
2013-06-27 21:09:06 +00:00
|
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|
h->sei_fpa.frame_packing_arrangement_cancel_flag = -1;
|
2009-02-21 19:56:50 +00:00
|
|
|
|
2010-07-23 00:34:09 +00:00
|
|
|
if (!buf_size)
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|
|
return 0;
|
|
|
|
|
2014-10-27 03:30:11 +00:00
|
|
|
buf_index = 0;
|
|
|
|
next_avc = h->is_avc ? 0 : buf_size;
|
2013-06-06 06:02:50 +00:00
|
|
|
for (;;) {
|
2012-02-18 09:29:58 +00:00
|
|
|
int src_length, dst_length, consumed, nalsize = 0;
|
2014-10-27 03:30:11 +00:00
|
|
|
|
|
|
|
if (buf_index >= next_avc) {
|
|
|
|
nalsize = get_avc_nalsize(h, buf, buf_size, &buf_index);
|
|
|
|
if (nalsize < 0)
|
2012-02-18 09:29:58 +00:00
|
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|
break;
|
2014-10-27 03:30:11 +00:00
|
|
|
next_avc = buf_index + nalsize;
|
2012-02-18 09:29:58 +00:00
|
|
|
} else {
|
2014-10-27 03:30:11 +00:00
|
|
|
buf_index = find_start_code(buf, buf_size, buf_index, next_avc);
|
|
|
|
if (buf_index >= buf_size)
|
|
|
|
break;
|
|
|
|
if (buf_index >= next_avc)
|
|
|
|
continue;
|
2012-02-18 09:29:58 +00:00
|
|
|
}
|
2014-10-27 03:30:11 +00:00
|
|
|
src_length = next_avc - buf_index;
|
|
|
|
|
|
|
|
state = buf[buf_index];
|
2009-02-21 19:56:50 +00:00
|
|
|
switch (state & 0x1f) {
|
|
|
|
case NAL_SLICE:
|
|
|
|
case NAL_IDR_SLICE:
|
|
|
|
// Do not walk the whole buffer just to decode slice header
|
2013-10-19 21:44:34 +00:00
|
|
|
if ((state & 0x1f) == NAL_IDR_SLICE || ((state >> 5) & 0x3) == 0) {
|
2013-09-24 09:30:50 +00:00
|
|
|
/* IDR or disposable slice
|
|
|
|
* No need to decode many bytes because MMCOs shall not be present. */
|
|
|
|
if (src_length > 60)
|
|
|
|
src_length = 60;
|
|
|
|
} else {
|
|
|
|
/* To decode up to MMCOs */
|
|
|
|
if (src_length > 1000)
|
|
|
|
src_length = 1000;
|
|
|
|
}
|
2009-02-21 19:56:50 +00:00
|
|
|
break;
|
|
|
|
}
|
2015-03-21 19:10:49 +00:00
|
|
|
ptr = ff_h264_decode_nal(h, sl, buf + buf_index, &dst_length,
|
2014-10-27 03:30:11 +00:00
|
|
|
&consumed, src_length);
|
2014-08-14 20:31:24 +00:00
|
|
|
if (!ptr || dst_length < 0)
|
2009-02-21 19:56:50 +00:00
|
|
|
break;
|
|
|
|
|
2014-10-27 03:30:11 +00:00
|
|
|
buf_index += consumed;
|
|
|
|
|
2013-06-06 06:02:50 +00:00
|
|
|
init_get_bits(&h->gb, ptr, 8 * dst_length);
|
|
|
|
switch (h->nal_unit_type) {
|
2009-02-21 19:56:50 +00:00
|
|
|
case NAL_SPS:
|
2015-04-10 16:35:07 +00:00
|
|
|
ff_h264_decode_seq_parameter_set(h, 0);
|
2009-02-21 19:56:50 +00:00
|
|
|
break;
|
|
|
|
case NAL_PPS:
|
2013-02-03 10:10:05 +00:00
|
|
|
ff_h264_decode_picture_parameter_set(h, h->gb.size_in_bits);
|
2009-02-21 19:56:50 +00:00
|
|
|
break;
|
|
|
|
case NAL_SEI:
|
|
|
|
ff_h264_decode_sei(h);
|
|
|
|
break;
|
|
|
|
case NAL_IDR_SLICE:
|
2009-02-21 19:59:25 +00:00
|
|
|
s->key_frame = 1;
|
2013-05-14 22:37:36 +00:00
|
|
|
|
|
|
|
h->prev_frame_num = 0;
|
|
|
|
h->prev_frame_num_offset = 0;
|
|
|
|
h->prev_poc_msb =
|
|
|
|
h->prev_poc_lsb = 0;
|
2013-06-06 06:02:50 +00:00
|
|
|
/* fall through */
|
2009-02-21 19:56:50 +00:00
|
|
|
case NAL_SLICE:
|
2015-01-27 13:39:06 +00:00
|
|
|
init_get_bits(&sl->gb, ptr, 8 * dst_length);
|
2015-03-21 16:13:24 +00:00
|
|
|
get_ue_golomb_long(&sl->gb); // skip first_mb_in_slice
|
2015-01-27 13:39:06 +00:00
|
|
|
slice_type = get_ue_golomb_31(&sl->gb);
|
2009-02-21 19:56:50 +00:00
|
|
|
s->pict_type = golomb_to_pict_type[slice_type % 5];
|
2009-02-21 19:59:25 +00:00
|
|
|
if (h->sei_recovery_frame_cnt >= 0) {
|
|
|
|
/* key frame, since recovery_frame_cnt is set */
|
|
|
|
s->key_frame = 1;
|
|
|
|
}
|
2015-01-27 13:39:06 +00:00
|
|
|
pps_id = get_ue_golomb(&sl->gb);
|
2013-06-06 06:02:50 +00:00
|
|
|
if (pps_id >= MAX_PPS_COUNT) {
|
|
|
|
av_log(h->avctx, AV_LOG_ERROR,
|
2014-02-12 23:30:12 +00:00
|
|
|
"pps_id %u out of range\n", pps_id);
|
2009-02-21 20:03:05 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2013-06-06 06:02:50 +00:00
|
|
|
if (!h->pps_buffers[pps_id]) {
|
|
|
|
av_log(h->avctx, AV_LOG_ERROR,
|
2014-02-12 23:30:12 +00:00
|
|
|
"non-existing PPS %u referenced\n", pps_id);
|
2009-02-21 20:03:05 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2013-06-06 06:02:50 +00:00
|
|
|
h->pps = *h->pps_buffers[pps_id];
|
|
|
|
if (!h->sps_buffers[h->pps.sps_id]) {
|
|
|
|
av_log(h->avctx, AV_LOG_ERROR,
|
2014-02-12 23:30:12 +00:00
|
|
|
"non-existing SPS %u referenced\n", h->pps.sps_id);
|
2009-02-21 20:03:05 +00:00
|
|
|
return -1;
|
|
|
|
}
|
2013-06-06 06:02:50 +00:00
|
|
|
h->sps = *h->sps_buffers[h->pps.sps_id];
|
2015-01-27 13:39:06 +00:00
|
|
|
h->frame_num = get_bits(&sl->gb, h->sps.log2_max_frame_num);
|
2009-02-21 20:03:05 +00:00
|
|
|
|
2013-10-26 13:46:43 +00:00
|
|
|
if(h->sps.ref_frame_count <= 1 && h->pps.ref_count[0] <= 1 && s->pict_type == AV_PICTURE_TYPE_I)
|
|
|
|
s->key_frame = 1;
|
|
|
|
|
2015-02-09 13:41:50 +00:00
|
|
|
s->coded_width = 16 * h->sps.mb_width;
|
|
|
|
s->coded_height = 16 * h->sps.mb_height;
|
|
|
|
s->width = s->coded_width - (h->sps.crop_right + h->sps.crop_left);
|
|
|
|
s->height = s->coded_height - (h->sps.crop_top + h->sps.crop_bottom);
|
|
|
|
if (s->width <= 0 || s->height <= 0) {
|
|
|
|
s->width = s->coded_width;
|
|
|
|
s->height = s->coded_height;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (h->sps.bit_depth_luma) {
|
|
|
|
case 9:
|
|
|
|
if (CHROMA444(h)) s->format = AV_PIX_FMT_YUV444P9;
|
|
|
|
else if (CHROMA422(h)) s->format = AV_PIX_FMT_YUV422P9;
|
|
|
|
else s->format = AV_PIX_FMT_YUV420P9;
|
|
|
|
break;
|
|
|
|
case 10:
|
|
|
|
if (CHROMA444(h)) s->format = AV_PIX_FMT_YUV444P10;
|
|
|
|
else if (CHROMA422(h)) s->format = AV_PIX_FMT_YUV422P10;
|
|
|
|
else s->format = AV_PIX_FMT_YUV420P10;
|
|
|
|
break;
|
|
|
|
case 8:
|
|
|
|
if (CHROMA444(h)) s->format = AV_PIX_FMT_YUV444P;
|
|
|
|
else if (CHROMA422(h)) s->format = AV_PIX_FMT_YUV422P;
|
|
|
|
else s->format = AV_PIX_FMT_YUV420P;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
s->format = AV_PIX_FMT_NONE;
|
|
|
|
}
|
|
|
|
|
2011-01-28 21:15:47 +00:00
|
|
|
avctx->profile = ff_h264_get_profile(&h->sps);
|
2010-01-28 20:57:29 +00:00
|
|
|
avctx->level = h->sps.level_idc;
|
|
|
|
|
2013-06-06 06:02:50 +00:00
|
|
|
if (h->sps.frame_mbs_only_flag) {
|
|
|
|
h->picture_structure = PICT_FRAME;
|
|
|
|
} else {
|
2015-01-27 13:39:06 +00:00
|
|
|
if (get_bits1(&sl->gb)) { // field_pic_flag
|
|
|
|
h->picture_structure = PICT_TOP_FIELD + get_bits1(&sl->gb); // bottom_field_flag
|
2009-02-21 20:03:05 +00:00
|
|
|
} else {
|
2013-06-06 06:02:50 +00:00
|
|
|
h->picture_structure = PICT_FRAME;
|
2009-02-21 20:03:05 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-05-14 22:37:36 +00:00
|
|
|
if (h->nal_unit_type == NAL_IDR_SLICE)
|
2015-12-29 07:04:08 +00:00
|
|
|
get_ue_golomb_long(&sl->gb); /* idr_pic_id */
|
2013-05-14 22:37:36 +00:00
|
|
|
if (h->sps.poc_type == 0) {
|
2015-01-27 13:39:06 +00:00
|
|
|
h->poc_lsb = get_bits(&sl->gb, h->sps.log2_max_poc_lsb);
|
2013-05-14 22:37:36 +00:00
|
|
|
|
2013-06-06 06:02:50 +00:00
|
|
|
if (h->pps.pic_order_present == 1 &&
|
|
|
|
h->picture_structure == PICT_FRAME)
|
2015-01-27 13:39:06 +00:00
|
|
|
h->delta_poc_bottom = get_se_golomb(&sl->gb);
|
2013-05-14 22:37:36 +00:00
|
|
|
}
|
|
|
|
|
2013-06-06 06:02:50 +00:00
|
|
|
if (h->sps.poc_type == 1 &&
|
|
|
|
!h->sps.delta_pic_order_always_zero_flag) {
|
2015-01-27 13:39:06 +00:00
|
|
|
h->delta_poc[0] = get_se_golomb(&sl->gb);
|
2013-05-14 22:37:36 +00:00
|
|
|
|
2013-06-06 06:02:50 +00:00
|
|
|
if (h->pps.pic_order_present == 1 &&
|
|
|
|
h->picture_structure == PICT_FRAME)
|
2015-01-27 13:39:06 +00:00
|
|
|
h->delta_poc[1] = get_se_golomb(&sl->gb);
|
2013-05-14 22:37:36 +00:00
|
|
|
}
|
|
|
|
|
2013-09-24 09:30:50 +00:00
|
|
|
/* Decode POC of this picture.
|
|
|
|
* The prev_ values needed for decoding POC of the next picture are not set here. */
|
2013-09-16 09:34:27 +00:00
|
|
|
field_poc[0] = field_poc[1] = INT_MAX;
|
2013-08-02 09:16:48 +00:00
|
|
|
ff_init_poc(h, field_poc, &s->output_picture_number);
|
2013-05-14 22:37:36 +00:00
|
|
|
|
2013-09-24 09:30:50 +00:00
|
|
|
/* Continue parsing to check if MMCO_RESET is present.
|
|
|
|
* FIXME: MMCO_RESET could appear in non-first slice.
|
|
|
|
* Maybe, we should parse all undisposable non-IDR slice of this
|
|
|
|
* picture until encountering MMCO_RESET in a slice of it. */
|
|
|
|
if (h->nal_ref_idc && h->nal_unit_type != NAL_IDR_SLICE) {
|
|
|
|
got_reset = scan_mmco_reset(s);
|
|
|
|
if (got_reset < 0)
|
|
|
|
return got_reset;
|
|
|
|
}
|
|
|
|
|
2013-09-16 09:34:27 +00:00
|
|
|
/* Set up the prev_ values for decoding POC of the next picture. */
|
2013-09-24 09:30:50 +00:00
|
|
|
h->prev_frame_num = got_reset ? 0 : h->frame_num;
|
|
|
|
h->prev_frame_num_offset = got_reset ? 0 : h->frame_num_offset;
|
2013-09-16 09:34:27 +00:00
|
|
|
if (h->nal_ref_idc != 0) {
|
2013-09-24 09:30:50 +00:00
|
|
|
if (!got_reset) {
|
|
|
|
h->prev_poc_msb = h->poc_msb;
|
|
|
|
h->prev_poc_lsb = h->poc_lsb;
|
|
|
|
} else {
|
|
|
|
h->prev_poc_msb = 0;
|
|
|
|
h->prev_poc_lsb =
|
|
|
|
h->picture_structure == PICT_BOTTOM_FIELD ? 0 : field_poc[0];
|
|
|
|
}
|
2013-09-16 09:34:27 +00:00
|
|
|
}
|
|
|
|
|
2013-06-06 06:02:50 +00:00
|
|
|
if (h->sps.pic_struct_present_flag) {
|
2009-02-21 20:11:47 +00:00
|
|
|
switch (h->sei_pic_struct) {
|
2013-06-06 06:02:50 +00:00
|
|
|
case SEI_PIC_STRUCT_TOP_FIELD:
|
|
|
|
case SEI_PIC_STRUCT_BOTTOM_FIELD:
|
|
|
|
s->repeat_pict = 0;
|
|
|
|
break;
|
|
|
|
case SEI_PIC_STRUCT_FRAME:
|
|
|
|
case SEI_PIC_STRUCT_TOP_BOTTOM:
|
|
|
|
case SEI_PIC_STRUCT_BOTTOM_TOP:
|
|
|
|
s->repeat_pict = 1;
|
|
|
|
break;
|
|
|
|
case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
|
|
|
|
case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
|
|
|
|
s->repeat_pict = 2;
|
|
|
|
break;
|
|
|
|
case SEI_PIC_STRUCT_FRAME_DOUBLING:
|
|
|
|
s->repeat_pict = 3;
|
|
|
|
break;
|
|
|
|
case SEI_PIC_STRUCT_FRAME_TRIPLING:
|
|
|
|
s->repeat_pict = 5;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
s->repeat_pict = h->picture_structure == PICT_FRAME ? 1 : 0;
|
|
|
|
break;
|
2009-02-21 20:11:47 +00:00
|
|
|
}
|
|
|
|
} else {
|
2013-02-03 10:10:05 +00:00
|
|
|
s->repeat_pict = h->picture_structure == PICT_FRAME ? 1 : 0;
|
2009-02-21 20:11:47 +00:00
|
|
|
}
|
|
|
|
|
2013-05-14 22:37:36 +00:00
|
|
|
if (h->picture_structure == PICT_FRAME) {
|
|
|
|
s->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
|
|
|
|
if (h->sps.pic_struct_present_flag) {
|
|
|
|
switch (h->sei_pic_struct) {
|
2013-06-06 06:02:50 +00:00
|
|
|
case SEI_PIC_STRUCT_TOP_BOTTOM:
|
|
|
|
case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
|
|
|
|
s->field_order = AV_FIELD_TT;
|
|
|
|
break;
|
|
|
|
case SEI_PIC_STRUCT_BOTTOM_TOP:
|
|
|
|
case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
|
|
|
|
s->field_order = AV_FIELD_BB;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
s->field_order = AV_FIELD_PROGRESSIVE;
|
|
|
|
break;
|
2013-05-14 22:37:36 +00:00
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (field_poc[0] < field_poc[1])
|
|
|
|
s->field_order = AV_FIELD_TT;
|
|
|
|
else if (field_poc[0] > field_poc[1])
|
|
|
|
s->field_order = AV_FIELD_BB;
|
|
|
|
else
|
|
|
|
s->field_order = AV_FIELD_PROGRESSIVE;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (h->picture_structure == PICT_TOP_FIELD)
|
|
|
|
s->picture_structure = AV_PICTURE_STRUCTURE_TOP_FIELD;
|
|
|
|
else
|
|
|
|
s->picture_structure = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
|
|
|
|
s->field_order = AV_FIELD_UNKNOWN;
|
|
|
|
}
|
|
|
|
|
2009-02-21 19:56:50 +00:00
|
|
|
return 0; /* no need to evaluate the rest */
|
|
|
|
}
|
|
|
|
}
|
2011-12-03 02:31:24 +00:00
|
|
|
if (q264)
|
|
|
|
return 0;
|
2009-02-21 19:56:50 +00:00
|
|
|
/* didn't find a picture! */
|
2013-02-16 20:14:00 +00:00
|
|
|
av_log(h->avctx, AV_LOG_ERROR, "missing picture in access unit with size %d\n", buf_size);
|
2009-02-21 19:56:50 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2007-05-10 22:26:44 +00:00
|
|
|
static int h264_parse(AVCodecParserContext *s,
|
|
|
|
AVCodecContext *avctx,
|
|
|
|
const uint8_t **poutbuf, int *poutbuf_size,
|
|
|
|
const uint8_t *buf, int buf_size)
|
|
|
|
{
|
2015-01-17 16:30:46 +00:00
|
|
|
H264ParseContext *p = s->priv_data;
|
|
|
|
H264Context *h = &p->h;
|
|
|
|
ParseContext *pc = &p->pc;
|
2007-05-10 22:26:44 +00:00
|
|
|
int next;
|
|
|
|
|
2015-01-17 16:30:46 +00:00
|
|
|
if (!p->got_first) {
|
|
|
|
p->got_first = 1;
|
2010-05-28 18:50:39 +00:00
|
|
|
if (avctx->extradata_size) {
|
2013-02-03 10:10:05 +00:00
|
|
|
h->avctx = avctx;
|
2011-08-19 20:38:34 +00:00
|
|
|
// must be done like in decoder, otherwise opening the parser,
|
|
|
|
// letting it create extradata and then closing and opening again
|
|
|
|
// will cause has_b_frames to be always set.
|
|
|
|
// Note that estimate_timings_from_pts does exactly this.
|
|
|
|
if (!avctx->has_b_frames)
|
2013-02-03 10:10:05 +00:00
|
|
|
h->low_delay = 1;
|
2011-09-23 03:42:45 +00:00
|
|
|
ff_h264_decode_extradata(h, avctx->extradata, avctx->extradata_size);
|
2010-05-28 18:50:39 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-06-06 06:02:50 +00:00
|
|
|
if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
|
|
|
|
next = buf_size;
|
|
|
|
} else {
|
2015-01-17 16:30:46 +00:00
|
|
|
next = h264_find_frame_end(p, buf, buf_size);
|
2007-05-10 22:26:44 +00:00
|
|
|
|
|
|
|
if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
|
2013-06-06 06:02:50 +00:00
|
|
|
*poutbuf = NULL;
|
2007-05-10 22:26:44 +00:00
|
|
|
*poutbuf_size = 0;
|
|
|
|
return buf_size;
|
|
|
|
}
|
|
|
|
|
2013-06-06 06:02:50 +00:00
|
|
|
if (next < 0 && next != END_NOT_FOUND) {
|
2013-06-08 08:50:24 +00:00
|
|
|
av_assert1(pc->last_index + next >= 0);
|
2015-01-17 16:30:46 +00:00
|
|
|
h264_find_frame_end(p, &pc->buffer[pc->last_index + next], -next); // update state
|
2007-05-10 22:26:44 +00:00
|
|
|
}
|
2011-03-29 04:42:02 +00:00
|
|
|
}
|
2009-02-21 19:56:50 +00:00
|
|
|
|
2011-03-29 04:43:23 +00:00
|
|
|
parse_nal_units(s, avctx, buf, buf_size);
|
2009-02-24 22:24:34 +00:00
|
|
|
|
2014-10-15 13:54:02 +00:00
|
|
|
if (avctx->framerate.num)
|
|
|
|
avctx->time_base = av_inv_q(av_mul_q(avctx->framerate, (AVRational){avctx->ticks_per_frame, 1}));
|
2011-03-29 04:43:23 +00:00
|
|
|
if (h->sei_cpb_removal_delay >= 0) {
|
|
|
|
s->dts_sync_point = h->sei_buffering_period_present;
|
|
|
|
s->dts_ref_dts_delta = h->sei_cpb_removal_delay;
|
|
|
|
s->pts_dts_delta = h->sei_dpb_output_delay;
|
|
|
|
} else {
|
|
|
|
s->dts_sync_point = INT_MIN;
|
|
|
|
s->dts_ref_dts_delta = INT_MIN;
|
|
|
|
s->pts_dts_delta = INT_MIN;
|
|
|
|
}
|
2011-03-29 04:42:02 +00:00
|
|
|
|
2011-03-29 04:43:23 +00:00
|
|
|
if (s->flags & PARSER_FLAG_ONCE) {
|
|
|
|
s->flags &= PARSER_FLAG_COMPLETE_FRAMES;
|
|
|
|
}
|
2007-05-10 22:26:44 +00:00
|
|
|
|
2013-06-06 06:02:50 +00:00
|
|
|
*poutbuf = buf;
|
2007-05-10 22:26:44 +00:00
|
|
|
*poutbuf_size = buf_size;
|
|
|
|
return next;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int h264_split(AVCodecContext *avctx,
|
|
|
|
const uint8_t *buf, int buf_size)
|
|
|
|
{
|
|
|
|
uint32_t state = -1;
|
2013-06-06 06:02:50 +00:00
|
|
|
int has_sps = 0;
|
2014-11-12 02:27:26 +00:00
|
|
|
int has_pps = 0;
|
2015-02-13 05:51:30 +00:00
|
|
|
const uint8_t *ptr = buf, *end = buf + buf_size;
|
|
|
|
int nalu_type;
|
2013-06-06 06:02:50 +00:00
|
|
|
|
2015-02-13 05:51:30 +00:00
|
|
|
while (ptr < end) {
|
|
|
|
ptr = avpriv_find_start_code(ptr, end, &state);
|
|
|
|
if ((state & 0xFFFFFF00) != 0x100)
|
|
|
|
break;
|
|
|
|
nalu_type = state & 0x1F;
|
|
|
|
if (nalu_type == NAL_SPS) {
|
2013-06-06 06:02:50 +00:00
|
|
|
has_sps = 1;
|
2015-02-13 05:51:30 +00:00
|
|
|
} else if (nalu_type == NAL_PPS)
|
2014-11-12 02:27:26 +00:00
|
|
|
has_pps = 1;
|
2015-02-13 05:51:30 +00:00
|
|
|
/* else if (nalu_type == 0x01 ||
|
|
|
|
* nalu_type == 0x02 ||
|
|
|
|
* nalu_type == 0x05) {
|
2013-06-06 06:02:50 +00:00
|
|
|
* }
|
|
|
|
*/
|
2015-02-13 05:51:30 +00:00
|
|
|
else if ((nalu_type != NAL_SEI || has_pps) &&
|
|
|
|
nalu_type != NAL_AUD && nalu_type != NAL_SPS_EXT &&
|
|
|
|
nalu_type != 0x0f) {
|
2013-06-06 06:02:50 +00:00
|
|
|
if (has_sps) {
|
2015-02-13 05:51:30 +00:00
|
|
|
while (ptr - 4 > buf && ptr[-5] == 0)
|
|
|
|
ptr--;
|
|
|
|
return ptr - 4 - buf;
|
2007-05-10 22:26:44 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2015-02-13 05:51:30 +00:00
|
|
|
|
2007-05-10 22:26:44 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-01-28 12:09:30 +00:00
|
|
|
static void h264_close(AVCodecParserContext *s)
|
2008-10-03 23:08:52 +00:00
|
|
|
{
|
2015-01-17 16:30:46 +00:00
|
|
|
H264ParseContext *p = s->priv_data;
|
|
|
|
H264Context *h = &p->h;
|
|
|
|
ParseContext *pc = &p->pc;
|
2008-10-03 23:08:52 +00:00
|
|
|
|
2014-10-30 22:58:52 +00:00
|
|
|
av_freep(&pc->buffer);
|
2009-04-10 07:01:55 +00:00
|
|
|
ff_h264_free_context(h);
|
2008-10-03 23:08:52 +00:00
|
|
|
}
|
|
|
|
|
2013-02-01 09:31:59 +00:00
|
|
|
static av_cold int init(AVCodecParserContext *s)
|
2010-01-28 13:04:25 +00:00
|
|
|
{
|
2015-01-17 16:30:46 +00:00
|
|
|
H264ParseContext *p = s->priv_data;
|
|
|
|
H264Context *h = &p->h;
|
2015-01-17 17:45:29 +00:00
|
|
|
|
|
|
|
h->slice_ctx = av_mallocz(sizeof(*h->slice_ctx));
|
|
|
|
if (!h->slice_ctx)
|
|
|
|
return 0;
|
|
|
|
h->nb_slice_ctx = 1;
|
|
|
|
|
2013-02-03 10:10:05 +00:00
|
|
|
h->slice_context_count = 1;
|
2013-08-05 12:12:46 +00:00
|
|
|
ff_h264dsp_init(&h->h264dsp, 8, 1);
|
2010-01-28 13:04:25 +00:00
|
|
|
return 0;
|
|
|
|
}
|
2007-05-10 22:26:44 +00:00
|
|
|
|
2011-01-25 21:40:11 +00:00
|
|
|
AVCodecParser ff_h264_parser = {
|
2012-08-05 09:11:04 +00:00
|
|
|
.codec_ids = { AV_CODEC_ID_H264 },
|
2015-01-17 16:30:46 +00:00
|
|
|
.priv_data_size = sizeof(H264ParseContext),
|
2011-11-02 08:34:41 +00:00
|
|
|
.parser_init = init,
|
|
|
|
.parser_parse = h264_parse,
|
2015-01-28 12:09:30 +00:00
|
|
|
.parser_close = h264_close,
|
2011-11-02 08:34:41 +00:00
|
|
|
.split = h264_split,
|
2007-05-10 22:26:44 +00:00
|
|
|
};
|