mirror of https://git.ffmpeg.org/ffmpeg.git
1374 lines
45 KiB
C
1374 lines
45 KiB
C
/*
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* H.26L/H.264/AVC/JVT/14496-10/... decoder
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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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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.264 / AVC / MPEG4 part10 codec.
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* @author Michael Niedermayer <michaelni@gmx.at>
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/display.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/opt.h"
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#include "libavutil/stereo3d.h"
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#include "libavutil/timer.h"
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#include "internal.h"
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#include "bytestream.h"
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#include "cabac.h"
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#include "cabac_functions.h"
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#include "error_resilience.h"
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#include "avcodec.h"
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#include "h264.h"
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#include "h2645_parse.h"
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#include "h264data.h"
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#include "h264chroma.h"
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#include "h264_mvpred.h"
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#include "golomb.h"
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#include "mathops.h"
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#include "me_cmp.h"
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#include "mpegutils.h"
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#include "profiles.h"
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#include "rectangle.h"
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#include "thread.h"
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#include <assert.h>
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const uint16_t ff_h264_mb_sizes[4] = { 256, 384, 512, 768 };
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static void h264_er_decode_mb(void *opaque, int ref, int mv_dir, int mv_type,
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int (*mv)[2][4][2],
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int mb_x, int mb_y, int mb_intra, int mb_skipped)
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{
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H264Context *h = opaque;
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H264SliceContext *sl = &h->slice_ctx[0];
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sl->mb_x = mb_x;
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sl->mb_y = mb_y;
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sl->mb_xy = mb_x + mb_y * h->mb_stride;
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memset(sl->non_zero_count_cache, 0, sizeof(sl->non_zero_count_cache));
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assert(ref >= 0);
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/* FIXME: It is possible albeit uncommon that slice references
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* differ between slices. We take the easy approach and ignore
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* it for now. If this turns out to have any relevance in
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* practice then correct remapping should be added. */
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if (ref >= sl->ref_count[0])
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ref = 0;
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fill_rectangle(&h->cur_pic.ref_index[0][4 * sl->mb_xy],
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2, 2, 2, ref, 1);
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fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, ref, 1);
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fill_rectangle(sl->mv_cache[0][scan8[0]], 4, 4, 8,
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pack16to32((*mv)[0][0][0], (*mv)[0][0][1]), 4);
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assert(!FRAME_MBAFF(h));
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ff_h264_hl_decode_mb(h, &h->slice_ctx[0]);
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}
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void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl,
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int y, int height)
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{
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AVCodecContext *avctx = h->avctx;
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const AVFrame *src = h->cur_pic.f;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
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int vshift = desc->log2_chroma_h;
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const int field_pic = h->picture_structure != PICT_FRAME;
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if (field_pic) {
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height <<= 1;
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y <<= 1;
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}
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height = FFMIN(height, avctx->height - y);
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if (field_pic && h->first_field && !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD))
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return;
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if (avctx->draw_horiz_band) {
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int offset[AV_NUM_DATA_POINTERS];
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int i;
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offset[0] = y * src->linesize[0];
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offset[1] =
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offset[2] = (y >> vshift) * src->linesize[1];
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for (i = 3; i < AV_NUM_DATA_POINTERS; i++)
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offset[i] = 0;
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emms_c();
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avctx->draw_horiz_band(avctx, src, offset,
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y, h->picture_structure, height);
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}
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}
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void ff_h264_free_tables(H264Context *h)
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{
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int i;
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av_freep(&h->intra4x4_pred_mode);
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av_freep(&h->chroma_pred_mode_table);
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av_freep(&h->cbp_table);
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av_freep(&h->mvd_table[0]);
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av_freep(&h->mvd_table[1]);
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av_freep(&h->direct_table);
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av_freep(&h->non_zero_count);
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av_freep(&h->slice_table_base);
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h->slice_table = NULL;
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av_freep(&h->list_counts);
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av_freep(&h->mb2b_xy);
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av_freep(&h->mb2br_xy);
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av_buffer_pool_uninit(&h->qscale_table_pool);
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av_buffer_pool_uninit(&h->mb_type_pool);
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av_buffer_pool_uninit(&h->motion_val_pool);
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av_buffer_pool_uninit(&h->ref_index_pool);
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for (i = 0; i < h->nb_slice_ctx; i++) {
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H264SliceContext *sl = &h->slice_ctx[i];
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av_freep(&sl->dc_val_base);
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av_freep(&sl->er.mb_index2xy);
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av_freep(&sl->er.error_status_table);
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av_freep(&sl->er.er_temp_buffer);
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av_freep(&sl->bipred_scratchpad);
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av_freep(&sl->edge_emu_buffer);
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av_freep(&sl->top_borders[0]);
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av_freep(&sl->top_borders[1]);
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sl->bipred_scratchpad_allocated = 0;
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sl->edge_emu_buffer_allocated = 0;
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sl->top_borders_allocated[0] = 0;
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sl->top_borders_allocated[1] = 0;
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}
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}
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int ff_h264_alloc_tables(H264Context *h)
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{
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const int big_mb_num = h->mb_stride * (h->mb_height + 1);
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const int row_mb_num = h->mb_stride * 2 * h->avctx->thread_count;
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int x, y;
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FF_ALLOCZ_OR_GOTO(h->avctx, h->intra4x4_pred_mode,
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row_mb_num * 8 * sizeof(uint8_t), fail)
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h->slice_ctx[0].intra4x4_pred_mode = h->intra4x4_pred_mode;
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FF_ALLOCZ_OR_GOTO(h->avctx, h->non_zero_count,
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big_mb_num * 48 * sizeof(uint8_t), fail)
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FF_ALLOCZ_OR_GOTO(h->avctx, h->slice_table_base,
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(big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base), fail)
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FF_ALLOCZ_OR_GOTO(h->avctx, h->cbp_table,
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big_mb_num * sizeof(uint16_t), fail)
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FF_ALLOCZ_OR_GOTO(h->avctx, h->chroma_pred_mode_table,
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big_mb_num * sizeof(uint8_t), fail)
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FF_ALLOCZ_OR_GOTO(h->avctx, h->mvd_table[0],
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16 * row_mb_num * sizeof(uint8_t), fail);
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FF_ALLOCZ_OR_GOTO(h->avctx, h->mvd_table[1],
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16 * row_mb_num * sizeof(uint8_t), fail);
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h->slice_ctx[0].mvd_table[0] = h->mvd_table[0];
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h->slice_ctx[0].mvd_table[1] = h->mvd_table[1];
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FF_ALLOCZ_OR_GOTO(h->avctx, h->direct_table,
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4 * big_mb_num * sizeof(uint8_t), fail);
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FF_ALLOCZ_OR_GOTO(h->avctx, h->list_counts,
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big_mb_num * sizeof(uint8_t), fail)
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memset(h->slice_table_base, -1,
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(big_mb_num + h->mb_stride) * sizeof(*h->slice_table_base));
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h->slice_table = h->slice_table_base + h->mb_stride * 2 + 1;
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FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2b_xy,
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big_mb_num * sizeof(uint32_t), fail);
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FF_ALLOCZ_OR_GOTO(h->avctx, h->mb2br_xy,
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big_mb_num * sizeof(uint32_t), fail);
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for (y = 0; y < h->mb_height; y++)
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for (x = 0; x < h->mb_width; x++) {
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const int mb_xy = x + y * h->mb_stride;
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const int b_xy = 4 * x + 4 * y * h->b_stride;
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h->mb2b_xy[mb_xy] = b_xy;
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h->mb2br_xy[mb_xy] = 8 * (FMO ? mb_xy : (mb_xy % (2 * h->mb_stride)));
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}
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return 0;
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fail:
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ff_h264_free_tables(h);
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return AVERROR(ENOMEM);
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}
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/**
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* Init context
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* Allocate buffers which are not shared amongst multiple threads.
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*/
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int ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl)
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{
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ERContext *er = &sl->er;
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int mb_array_size = h->mb_height * h->mb_stride;
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int y_size = (2 * h->mb_width + 1) * (2 * h->mb_height + 1);
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int c_size = h->mb_stride * (h->mb_height + 1);
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int yc_size = y_size + 2 * c_size;
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int x, y, i;
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sl->ref_cache[0][scan8[5] + 1] =
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sl->ref_cache[0][scan8[7] + 1] =
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sl->ref_cache[0][scan8[13] + 1] =
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sl->ref_cache[1][scan8[5] + 1] =
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sl->ref_cache[1][scan8[7] + 1] =
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sl->ref_cache[1][scan8[13] + 1] = PART_NOT_AVAILABLE;
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if (CONFIG_ERROR_RESILIENCE) {
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/* init ER */
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er->avctx = h->avctx;
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er->decode_mb = h264_er_decode_mb;
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er->opaque = h;
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er->quarter_sample = 1;
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er->mb_num = h->mb_num;
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er->mb_width = h->mb_width;
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er->mb_height = h->mb_height;
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er->mb_stride = h->mb_stride;
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er->b8_stride = h->mb_width * 2 + 1;
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// error resilience code looks cleaner with this
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FF_ALLOCZ_OR_GOTO(h->avctx, er->mb_index2xy,
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(h->mb_num + 1) * sizeof(int), fail);
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for (y = 0; y < h->mb_height; y++)
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for (x = 0; x < h->mb_width; x++)
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er->mb_index2xy[x + y * h->mb_width] = x + y * h->mb_stride;
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er->mb_index2xy[h->mb_height * h->mb_width] = (h->mb_height - 1) *
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h->mb_stride + h->mb_width;
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FF_ALLOCZ_OR_GOTO(h->avctx, er->error_status_table,
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mb_array_size * sizeof(uint8_t), fail);
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FF_ALLOC_OR_GOTO(h->avctx, er->er_temp_buffer,
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h->mb_height * h->mb_stride, fail);
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FF_ALLOCZ_OR_GOTO(h->avctx, sl->dc_val_base,
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yc_size * sizeof(int16_t), fail);
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er->dc_val[0] = sl->dc_val_base + h->mb_width * 2 + 2;
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er->dc_val[1] = sl->dc_val_base + y_size + h->mb_stride + 1;
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er->dc_val[2] = er->dc_val[1] + c_size;
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for (i = 0; i < yc_size; i++)
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sl->dc_val_base[i] = 1024;
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}
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return 0;
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fail:
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return AVERROR(ENOMEM); // ff_h264_free_tables will clean up for us
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}
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static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
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int parse_extradata);
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/* There are (invalid) samples in the wild with mp4-style extradata, where the
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* parameter sets are stored unescaped (i.e. as RBSP).
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* This function catches the parameter set decoding failure and tries again
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* after escaping it */
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static int decode_extradata_ps_mp4(H264Context *h, const uint8_t *buf, int buf_size)
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{
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int ret;
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ret = decode_nal_units(h, buf, buf_size, 1);
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if (ret < 0 && !(h->avctx->err_recognition & AV_EF_EXPLODE)) {
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GetByteContext gbc;
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PutByteContext pbc;
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uint8_t *escaped_buf;
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int escaped_buf_size;
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av_log(h->avctx, AV_LOG_WARNING,
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"SPS decoding failure, trying again after escaping the NAL\n");
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if (buf_size / 2 >= (INT16_MAX - AV_INPUT_BUFFER_PADDING_SIZE) / 3)
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return AVERROR(ERANGE);
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escaped_buf_size = buf_size * 3 / 2 + AV_INPUT_BUFFER_PADDING_SIZE;
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escaped_buf = av_mallocz(escaped_buf_size);
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if (!escaped_buf)
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return AVERROR(ENOMEM);
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bytestream2_init(&gbc, buf, buf_size);
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bytestream2_init_writer(&pbc, escaped_buf, escaped_buf_size);
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while (bytestream2_get_bytes_left(&gbc)) {
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if (bytestream2_get_bytes_left(&gbc) >= 3 &&
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bytestream2_peek_be24(&gbc) <= 3) {
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bytestream2_put_be24(&pbc, 3);
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bytestream2_skip(&gbc, 2);
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} else
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bytestream2_put_byte(&pbc, bytestream2_get_byte(&gbc));
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}
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escaped_buf_size = bytestream2_tell_p(&pbc);
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AV_WB16(escaped_buf, escaped_buf_size - 2);
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ret = decode_nal_units(h, escaped_buf, escaped_buf_size, 1);
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av_freep(&escaped_buf);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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int ff_h264_decode_extradata(H264Context *h)
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{
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AVCodecContext *avctx = h->avctx;
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int ret;
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if (avctx->extradata[0] == 1) {
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int i, cnt, nalsize;
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unsigned char *p = avctx->extradata;
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h->is_avc = 1;
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if (avctx->extradata_size < 7) {
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av_log(avctx, AV_LOG_ERROR,
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"avcC %d too short\n", avctx->extradata_size);
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return AVERROR_INVALIDDATA;
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}
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/* sps and pps in the avcC always have length coded with 2 bytes,
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* so put a fake nal_length_size = 2 while parsing them */
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h->nal_length_size = 2;
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// Decode sps from avcC
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cnt = *(p + 5) & 0x1f; // Number of sps
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p += 6;
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for (i = 0; i < cnt; i++) {
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nalsize = AV_RB16(p) + 2;
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if (p - avctx->extradata + nalsize > avctx->extradata_size)
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return AVERROR_INVALIDDATA;
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ret = decode_extradata_ps_mp4(h, p, nalsize);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR,
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"Decoding sps %d from avcC failed\n", i);
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return ret;
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}
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p += nalsize;
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}
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// Decode pps from avcC
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cnt = *(p++); // Number of pps
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for (i = 0; i < cnt; i++) {
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nalsize = AV_RB16(p) + 2;
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if (p - avctx->extradata + nalsize > avctx->extradata_size)
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return AVERROR_INVALIDDATA;
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ret = decode_extradata_ps_mp4(h, p, nalsize);
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if (ret < 0) {
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av_log(avctx, AV_LOG_ERROR,
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"Decoding pps %d from avcC failed\n", i);
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return ret;
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}
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p += nalsize;
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}
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// Store right nal length size that will be used to parse all other nals
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h->nal_length_size = (avctx->extradata[4] & 0x03) + 1;
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} else {
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h->is_avc = 0;
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ret = decode_nal_units(h, avctx->extradata, avctx->extradata_size, 1);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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static int h264_init_context(AVCodecContext *avctx, H264Context *h)
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{
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int i;
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h->avctx = avctx;
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h->picture_structure = PICT_FRAME;
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h->slice_context_count = 1;
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h->workaround_bugs = avctx->workaround_bugs;
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h->flags = avctx->flags;
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h->prev_poc_msb = 1 << 16;
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h->x264_build = -1;
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h->recovery_frame = -1;
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h->frame_recovered = 0;
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h->next_outputed_poc = INT_MIN;
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for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
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h->last_pocs[i] = INT_MIN;
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ff_h264_reset_sei(h);
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avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
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h->nb_slice_ctx = (avctx->active_thread_type & FF_THREAD_SLICE) ? H264_MAX_THREADS : 1;
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h->slice_ctx = av_mallocz_array(h->nb_slice_ctx, sizeof(*h->slice_ctx));
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if (!h->slice_ctx) {
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h->nb_slice_ctx = 0;
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return AVERROR(ENOMEM);
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}
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for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
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h->DPB[i].f = av_frame_alloc();
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if (!h->DPB[i].f)
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return AVERROR(ENOMEM);
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}
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h->cur_pic.f = av_frame_alloc();
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if (!h->cur_pic.f)
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return AVERROR(ENOMEM);
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for (i = 0; i < h->nb_slice_ctx; i++)
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h->slice_ctx[i].h264 = h;
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return 0;
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}
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|
|
static AVOnce h264_vlc_init = AV_ONCE_INIT;
|
|
|
|
av_cold int ff_h264_decode_init(AVCodecContext *avctx)
|
|
{
|
|
H264Context *h = avctx->priv_data;
|
|
int ret;
|
|
|
|
ret = h264_init_context(avctx, h);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* set defaults */
|
|
if (!avctx->has_b_frames)
|
|
h->low_delay = 1;
|
|
|
|
ret = ff_thread_once(&h264_vlc_init, ff_h264_decode_init_vlc);
|
|
if (ret != 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "pthread_once has failed.");
|
|
return AVERROR_UNKNOWN;
|
|
}
|
|
|
|
if (avctx->codec_id == AV_CODEC_ID_H264) {
|
|
if (avctx->ticks_per_frame == 1)
|
|
h->avctx->framerate.num *= 2;
|
|
avctx->ticks_per_frame = 2;
|
|
}
|
|
|
|
if (avctx->extradata_size > 0 && avctx->extradata) {
|
|
ret = ff_h264_decode_extradata(h);
|
|
if (ret < 0) {
|
|
ff_h264_free_context(h);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (h->ps.sps && h->ps.sps->bitstream_restriction_flag &&
|
|
h->avctx->has_b_frames < h->ps.sps->num_reorder_frames) {
|
|
h->avctx->has_b_frames = h->ps.sps->num_reorder_frames;
|
|
h->low_delay = 0;
|
|
}
|
|
|
|
avctx->internal->allocate_progress = 1;
|
|
|
|
if (h->enable_er) {
|
|
av_log(avctx, AV_LOG_WARNING,
|
|
"Error resilience is enabled. It is unsafe and unsupported and may crash. "
|
|
"Use it at your own risk\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int decode_init_thread_copy(AVCodecContext *avctx)
|
|
{
|
|
H264Context *h = avctx->priv_data;
|
|
int ret;
|
|
|
|
if (!avctx->internal->is_copy)
|
|
return 0;
|
|
|
|
memset(h, 0, sizeof(*h));
|
|
|
|
ret = h264_init_context(avctx, h);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
h->context_initialized = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Run setup operations that must be run after slice header decoding.
|
|
* This includes finding the next displayed frame.
|
|
*
|
|
* @param h h264 master context
|
|
* @param setup_finished enough NALs have been read that we can call
|
|
* ff_thread_finish_setup()
|
|
*/
|
|
static void decode_postinit(H264Context *h, int setup_finished)
|
|
{
|
|
const SPS *sps = h->ps.sps;
|
|
H264Picture *out = h->cur_pic_ptr;
|
|
H264Picture *cur = h->cur_pic_ptr;
|
|
int i, pics, out_of_order, out_idx;
|
|
int invalid = 0, cnt = 0;
|
|
|
|
h->cur_pic_ptr->f->pict_type = h->pict_type;
|
|
|
|
if (h->next_output_pic)
|
|
return;
|
|
|
|
if (cur->field_poc[0] == INT_MAX || cur->field_poc[1] == INT_MAX) {
|
|
/* FIXME: if we have two PAFF fields in one packet, we can't start
|
|
* the next thread here. If we have one field per packet, we can.
|
|
* The check in decode_nal_units() is not good enough to find this
|
|
* yet, so we assume the worst for now. */
|
|
// if (setup_finished)
|
|
// ff_thread_finish_setup(h->avctx);
|
|
return;
|
|
}
|
|
|
|
cur->f->interlaced_frame = 0;
|
|
cur->f->repeat_pict = 0;
|
|
|
|
/* Signal interlacing information externally. */
|
|
/* Prioritize picture timing SEI information over used
|
|
* decoding process if it exists. */
|
|
|
|
if (sps->pic_struct_present_flag) {
|
|
switch (h->sei_pic_struct) {
|
|
case SEI_PIC_STRUCT_FRAME:
|
|
break;
|
|
case SEI_PIC_STRUCT_TOP_FIELD:
|
|
case SEI_PIC_STRUCT_BOTTOM_FIELD:
|
|
cur->f->interlaced_frame = 1;
|
|
break;
|
|
case SEI_PIC_STRUCT_TOP_BOTTOM:
|
|
case SEI_PIC_STRUCT_BOTTOM_TOP:
|
|
if (FIELD_OR_MBAFF_PICTURE(h))
|
|
cur->f->interlaced_frame = 1;
|
|
else
|
|
// try to flag soft telecine progressive
|
|
cur->f->interlaced_frame = h->prev_interlaced_frame;
|
|
break;
|
|
case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
|
|
case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
|
|
/* Signal the possibility of telecined film externally
|
|
* (pic_struct 5,6). From these hints, let the applications
|
|
* decide if they apply deinterlacing. */
|
|
cur->f->repeat_pict = 1;
|
|
break;
|
|
case SEI_PIC_STRUCT_FRAME_DOUBLING:
|
|
cur->f->repeat_pict = 2;
|
|
break;
|
|
case SEI_PIC_STRUCT_FRAME_TRIPLING:
|
|
cur->f->repeat_pict = 4;
|
|
break;
|
|
}
|
|
|
|
if ((h->sei_ct_type & 3) &&
|
|
h->sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
|
|
cur->f->interlaced_frame = (h->sei_ct_type & (1 << 1)) != 0;
|
|
} else {
|
|
/* Derive interlacing flag from used decoding process. */
|
|
cur->f->interlaced_frame = FIELD_OR_MBAFF_PICTURE(h);
|
|
}
|
|
h->prev_interlaced_frame = cur->f->interlaced_frame;
|
|
|
|
if (cur->field_poc[0] != cur->field_poc[1]) {
|
|
/* Derive top_field_first from field pocs. */
|
|
cur->f->top_field_first = cur->field_poc[0] < cur->field_poc[1];
|
|
} else {
|
|
if (cur->f->interlaced_frame || sps->pic_struct_present_flag) {
|
|
/* Use picture timing SEI information. Even if it is a
|
|
* information of a past frame, better than nothing. */
|
|
if (h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM ||
|
|
h->sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
|
|
cur->f->top_field_first = 1;
|
|
else
|
|
cur->f->top_field_first = 0;
|
|
} else {
|
|
/* Most likely progressive */
|
|
cur->f->top_field_first = 0;
|
|
}
|
|
}
|
|
|
|
if (h->sei_frame_packing_present &&
|
|
h->frame_packing_arrangement_type >= 0 &&
|
|
h->frame_packing_arrangement_type <= 6 &&
|
|
h->content_interpretation_type > 0 &&
|
|
h->content_interpretation_type < 3) {
|
|
AVStereo3D *stereo = av_stereo3d_create_side_data(cur->f);
|
|
if (!stereo)
|
|
return;
|
|
|
|
switch (h->frame_packing_arrangement_type) {
|
|
case 0:
|
|
stereo->type = AV_STEREO3D_CHECKERBOARD;
|
|
break;
|
|
case 1:
|
|
stereo->type = AV_STEREO3D_COLUMNS;
|
|
break;
|
|
case 2:
|
|
stereo->type = AV_STEREO3D_LINES;
|
|
break;
|
|
case 3:
|
|
if (h->quincunx_subsampling)
|
|
stereo->type = AV_STEREO3D_SIDEBYSIDE_QUINCUNX;
|
|
else
|
|
stereo->type = AV_STEREO3D_SIDEBYSIDE;
|
|
break;
|
|
case 4:
|
|
stereo->type = AV_STEREO3D_TOPBOTTOM;
|
|
break;
|
|
case 5:
|
|
stereo->type = AV_STEREO3D_FRAMESEQUENCE;
|
|
break;
|
|
case 6:
|
|
stereo->type = AV_STEREO3D_2D;
|
|
break;
|
|
}
|
|
|
|
if (h->content_interpretation_type == 2)
|
|
stereo->flags = AV_STEREO3D_FLAG_INVERT;
|
|
}
|
|
|
|
if (h->sei_display_orientation_present &&
|
|
(h->sei_anticlockwise_rotation || h->sei_hflip || h->sei_vflip)) {
|
|
double angle = h->sei_anticlockwise_rotation * 360 / (double) (1 << 16);
|
|
AVFrameSideData *rotation = av_frame_new_side_data(cur->f,
|
|
AV_FRAME_DATA_DISPLAYMATRIX,
|
|
sizeof(int32_t) * 9);
|
|
if (!rotation)
|
|
return;
|
|
|
|
av_display_rotation_set((int32_t *)rotation->data, angle);
|
|
av_display_matrix_flip((int32_t *)rotation->data,
|
|
h->sei_hflip, h->sei_vflip);
|
|
}
|
|
|
|
if (h->sei_reguserdata_afd_present) {
|
|
AVFrameSideData *sd = av_frame_new_side_data(cur->f, AV_FRAME_DATA_AFD,
|
|
sizeof(uint8_t));
|
|
if (!sd)
|
|
return;
|
|
|
|
*sd->data = h->active_format_description;
|
|
h->sei_reguserdata_afd_present = 0;
|
|
}
|
|
|
|
if (h->a53_caption) {
|
|
AVFrameSideData *sd = av_frame_new_side_data(cur->f,
|
|
AV_FRAME_DATA_A53_CC,
|
|
h->a53_caption_size);
|
|
if (!sd)
|
|
return;
|
|
|
|
memcpy(sd->data, h->a53_caption, h->a53_caption_size);
|
|
av_freep(&h->a53_caption);
|
|
h->a53_caption_size = 0;
|
|
}
|
|
|
|
// FIXME do something with unavailable reference frames
|
|
|
|
/* Sort B-frames into display order */
|
|
if (sps->bitstream_restriction_flag ||
|
|
h->avctx->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
|
|
h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames, sps->num_reorder_frames);
|
|
}
|
|
h->low_delay = !h->avctx->has_b_frames;
|
|
|
|
pics = 0;
|
|
while (h->delayed_pic[pics])
|
|
pics++;
|
|
|
|
assert(pics <= MAX_DELAYED_PIC_COUNT);
|
|
|
|
h->delayed_pic[pics++] = cur;
|
|
if (cur->reference == 0)
|
|
cur->reference = DELAYED_PIC_REF;
|
|
|
|
/* Frame reordering. This code takes pictures from coding order and sorts
|
|
* them by their incremental POC value into display order. It supports POC
|
|
* gaps, MMCO reset codes and random resets.
|
|
* A "display group" can start either with a IDR frame (f.key_frame = 1),
|
|
* and/or can be closed down with a MMCO reset code. In sequences where
|
|
* there is no delay, we can't detect that (since the frame was already
|
|
* output to the user), so we also set h->mmco_reset to detect the MMCO
|
|
* reset code.
|
|
* FIXME: if we detect insufficient delays (as per h->avctx->has_b_frames),
|
|
* we increase the delay between input and output. All frames affected by
|
|
* the lag (e.g. those that should have been output before another frame
|
|
* that we already returned to the user) will be dropped. This is a bug
|
|
* that we will fix later. */
|
|
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++) {
|
|
cnt += out->poc < h->last_pocs[i];
|
|
invalid += out->poc == INT_MIN;
|
|
}
|
|
if (!h->mmco_reset && !cur->f->key_frame &&
|
|
cnt + invalid == MAX_DELAYED_PIC_COUNT && cnt > 0) {
|
|
h->mmco_reset = 2;
|
|
if (pics > 1)
|
|
h->delayed_pic[pics - 2]->mmco_reset = 2;
|
|
}
|
|
if (h->mmco_reset || cur->f->key_frame) {
|
|
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
|
|
h->last_pocs[i] = INT_MIN;
|
|
cnt = 0;
|
|
invalid = MAX_DELAYED_PIC_COUNT;
|
|
}
|
|
out = h->delayed_pic[0];
|
|
out_idx = 0;
|
|
for (i = 1; i < MAX_DELAYED_PIC_COUNT &&
|
|
h->delayed_pic[i] &&
|
|
!h->delayed_pic[i - 1]->mmco_reset &&
|
|
!h->delayed_pic[i]->f->key_frame;
|
|
i++)
|
|
if (h->delayed_pic[i]->poc < out->poc) {
|
|
out = h->delayed_pic[i];
|
|
out_idx = i;
|
|
}
|
|
if (h->avctx->has_b_frames == 0 &&
|
|
(h->delayed_pic[0]->f->key_frame || h->mmco_reset))
|
|
h->next_outputed_poc = INT_MIN;
|
|
out_of_order = !out->f->key_frame && !h->mmco_reset &&
|
|
(out->poc < h->next_outputed_poc);
|
|
|
|
if (sps->bitstream_restriction_flag &&
|
|
h->avctx->has_b_frames >= sps->num_reorder_frames) {
|
|
} else if (out_of_order && pics - 1 == h->avctx->has_b_frames &&
|
|
h->avctx->has_b_frames < MAX_DELAYED_PIC_COUNT) {
|
|
if (invalid + cnt < MAX_DELAYED_PIC_COUNT) {
|
|
h->avctx->has_b_frames = FFMAX(h->avctx->has_b_frames, cnt);
|
|
}
|
|
h->low_delay = 0;
|
|
} else if (h->low_delay &&
|
|
((h->next_outputed_poc != INT_MIN &&
|
|
out->poc > h->next_outputed_poc + 2) ||
|
|
cur->f->pict_type == AV_PICTURE_TYPE_B)) {
|
|
h->low_delay = 0;
|
|
h->avctx->has_b_frames++;
|
|
}
|
|
|
|
if (pics > h->avctx->has_b_frames) {
|
|
out->reference &= ~DELAYED_PIC_REF;
|
|
// for frame threading, the owner must be the second field's thread or
|
|
// else the first thread can release the picture and reuse it unsafely
|
|
for (i = out_idx; h->delayed_pic[i]; i++)
|
|
h->delayed_pic[i] = h->delayed_pic[i + 1];
|
|
}
|
|
memmove(h->last_pocs, &h->last_pocs[1],
|
|
sizeof(*h->last_pocs) * (MAX_DELAYED_PIC_COUNT - 1));
|
|
h->last_pocs[MAX_DELAYED_PIC_COUNT - 1] = cur->poc;
|
|
if (!out_of_order && pics > h->avctx->has_b_frames) {
|
|
h->next_output_pic = out;
|
|
if (out->mmco_reset) {
|
|
if (out_idx > 0) {
|
|
h->next_outputed_poc = out->poc;
|
|
h->delayed_pic[out_idx - 1]->mmco_reset = out->mmco_reset;
|
|
} else {
|
|
h->next_outputed_poc = INT_MIN;
|
|
}
|
|
} else {
|
|
if (out_idx == 0 && pics > 1 && h->delayed_pic[0]->f->key_frame) {
|
|
h->next_outputed_poc = INT_MIN;
|
|
} else {
|
|
h->next_outputed_poc = out->poc;
|
|
}
|
|
}
|
|
h->mmco_reset = 0;
|
|
} else {
|
|
av_log(h->avctx, AV_LOG_DEBUG, "no picture\n");
|
|
}
|
|
|
|
if (h->next_output_pic) {
|
|
if (h->next_output_pic->recovered) {
|
|
// We have reached an recovery point and all frames after it in
|
|
// display order are "recovered".
|
|
h->frame_recovered |= FRAME_RECOVERED_SEI;
|
|
}
|
|
h->next_output_pic->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_SEI);
|
|
}
|
|
|
|
if (setup_finished && !h->avctx->hwaccel) {
|
|
ff_thread_finish_setup(h->avctx);
|
|
|
|
if (h->avctx->active_thread_type & FF_THREAD_FRAME)
|
|
h->setup_finished = 1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* instantaneous decoder refresh.
|
|
*/
|
|
static void idr(H264Context *h)
|
|
{
|
|
ff_h264_remove_all_refs(h);
|
|
h->prev_frame_num =
|
|
h->prev_frame_num_offset =
|
|
h->prev_poc_msb =
|
|
h->prev_poc_lsb = 0;
|
|
}
|
|
|
|
/* forget old pics after a seek */
|
|
void ff_h264_flush_change(H264Context *h)
|
|
{
|
|
int i;
|
|
for (i = 0; i < MAX_DELAYED_PIC_COUNT; i++)
|
|
h->last_pocs[i] = INT_MIN;
|
|
h->next_outputed_poc = INT_MIN;
|
|
h->prev_interlaced_frame = 1;
|
|
idr(h);
|
|
if (h->cur_pic_ptr)
|
|
h->cur_pic_ptr->reference = 0;
|
|
h->first_field = 0;
|
|
ff_h264_reset_sei(h);
|
|
h->recovery_frame = -1;
|
|
h->frame_recovered = 0;
|
|
}
|
|
|
|
/* forget old pics after a seek */
|
|
static void flush_dpb(AVCodecContext *avctx)
|
|
{
|
|
H264Context *h = avctx->priv_data;
|
|
int i;
|
|
|
|
memset(h->delayed_pic, 0, sizeof(h->delayed_pic));
|
|
|
|
ff_h264_flush_change(h);
|
|
|
|
for (i = 0; i < H264_MAX_PICTURE_COUNT; i++)
|
|
ff_h264_unref_picture(h, &h->DPB[i]);
|
|
h->cur_pic_ptr = NULL;
|
|
ff_h264_unref_picture(h, &h->cur_pic);
|
|
|
|
h->mb_y = 0;
|
|
|
|
ff_h264_free_tables(h);
|
|
h->context_initialized = 0;
|
|
}
|
|
|
|
int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc)
|
|
{
|
|
const SPS *sps = h->ps.sps;
|
|
const int max_frame_num = 1 << sps->log2_max_frame_num;
|
|
int field_poc[2];
|
|
|
|
h->frame_num_offset = h->prev_frame_num_offset;
|
|
if (h->frame_num < h->prev_frame_num)
|
|
h->frame_num_offset += max_frame_num;
|
|
|
|
if (sps->poc_type == 0) {
|
|
const int max_poc_lsb = 1 << sps->log2_max_poc_lsb;
|
|
|
|
if (h->poc_lsb < h->prev_poc_lsb &&
|
|
h->prev_poc_lsb - h->poc_lsb >= max_poc_lsb / 2)
|
|
h->poc_msb = h->prev_poc_msb + max_poc_lsb;
|
|
else if (h->poc_lsb > h->prev_poc_lsb &&
|
|
h->prev_poc_lsb - h->poc_lsb < -max_poc_lsb / 2)
|
|
h->poc_msb = h->prev_poc_msb - max_poc_lsb;
|
|
else
|
|
h->poc_msb = h->prev_poc_msb;
|
|
field_poc[0] =
|
|
field_poc[1] = h->poc_msb + h->poc_lsb;
|
|
if (h->picture_structure == PICT_FRAME)
|
|
field_poc[1] += h->delta_poc_bottom;
|
|
} else if (sps->poc_type == 1) {
|
|
int abs_frame_num, expected_delta_per_poc_cycle, expectedpoc;
|
|
int i;
|
|
|
|
if (sps->poc_cycle_length != 0)
|
|
abs_frame_num = h->frame_num_offset + h->frame_num;
|
|
else
|
|
abs_frame_num = 0;
|
|
|
|
if (h->nal_ref_idc == 0 && abs_frame_num > 0)
|
|
abs_frame_num--;
|
|
|
|
expected_delta_per_poc_cycle = 0;
|
|
for (i = 0; i < sps->poc_cycle_length; i++)
|
|
// FIXME integrate during sps parse
|
|
expected_delta_per_poc_cycle += sps->offset_for_ref_frame[i];
|
|
|
|
if (abs_frame_num > 0) {
|
|
int poc_cycle_cnt = (abs_frame_num - 1) / sps->poc_cycle_length;
|
|
int frame_num_in_poc_cycle = (abs_frame_num - 1) % sps->poc_cycle_length;
|
|
|
|
expectedpoc = poc_cycle_cnt * expected_delta_per_poc_cycle;
|
|
for (i = 0; i <= frame_num_in_poc_cycle; i++)
|
|
expectedpoc = expectedpoc + sps->offset_for_ref_frame[i];
|
|
} else
|
|
expectedpoc = 0;
|
|
|
|
if (h->nal_ref_idc == 0)
|
|
expectedpoc = expectedpoc + sps->offset_for_non_ref_pic;
|
|
|
|
field_poc[0] = expectedpoc + h->delta_poc[0];
|
|
field_poc[1] = field_poc[0] + sps->offset_for_top_to_bottom_field;
|
|
|
|
if (h->picture_structure == PICT_FRAME)
|
|
field_poc[1] += h->delta_poc[1];
|
|
} else {
|
|
int poc = 2 * (h->frame_num_offset + h->frame_num);
|
|
|
|
if (!h->nal_ref_idc)
|
|
poc--;
|
|
|
|
field_poc[0] = poc;
|
|
field_poc[1] = poc;
|
|
}
|
|
|
|
if (h->picture_structure != PICT_BOTTOM_FIELD)
|
|
pic_field_poc[0] = field_poc[0];
|
|
if (h->picture_structure != PICT_TOP_FIELD)
|
|
pic_field_poc[1] = field_poc[1];
|
|
*pic_poc = FFMIN(pic_field_poc[0], pic_field_poc[1]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Compute profile from profile_idc and constraint_set?_flags.
|
|
*
|
|
* @param sps SPS
|
|
*
|
|
* @return profile as defined by FF_PROFILE_H264_*
|
|
*/
|
|
int ff_h264_get_profile(const SPS *sps)
|
|
{
|
|
int profile = sps->profile_idc;
|
|
|
|
switch (sps->profile_idc) {
|
|
case FF_PROFILE_H264_BASELINE:
|
|
// constraint_set1_flag set to 1
|
|
profile |= (sps->constraint_set_flags & 1 << 1) ? FF_PROFILE_H264_CONSTRAINED : 0;
|
|
break;
|
|
case FF_PROFILE_H264_HIGH_10:
|
|
case FF_PROFILE_H264_HIGH_422:
|
|
case FF_PROFILE_H264_HIGH_444_PREDICTIVE:
|
|
// constraint_set3_flag set to 1
|
|
profile |= (sps->constraint_set_flags & 1 << 3) ? FF_PROFILE_H264_INTRA : 0;
|
|
break;
|
|
}
|
|
|
|
return profile;
|
|
}
|
|
|
|
static int get_last_needed_nal(H264Context *h)
|
|
{
|
|
int nals_needed = 0;
|
|
int i;
|
|
|
|
for (i = 0; i < h->pkt.nb_nals; i++) {
|
|
H2645NAL *nal = &h->pkt.nals[i];
|
|
GetBitContext gb;
|
|
|
|
/* packets can sometimes contain multiple PPS/SPS,
|
|
* e.g. two PAFF field pictures in one packet, or a demuxer
|
|
* which splits NALs strangely if so, when frame threading we
|
|
* can't start the next thread until we've read all of them */
|
|
switch (nal->type) {
|
|
case NAL_SPS:
|
|
case NAL_PPS:
|
|
nals_needed = i;
|
|
break;
|
|
case NAL_DPA:
|
|
case NAL_IDR_SLICE:
|
|
case NAL_SLICE:
|
|
init_get_bits(&gb, nal->data + 1, (nal->size - 1) * 8);
|
|
if (!get_ue_golomb(&gb))
|
|
nals_needed = i;
|
|
}
|
|
}
|
|
|
|
return nals_needed;
|
|
}
|
|
|
|
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size,
|
|
int parse_extradata)
|
|
{
|
|
AVCodecContext *const avctx = h->avctx;
|
|
unsigned context_count = 0;
|
|
int nals_needed = 0; ///< number of NALs that need decoding before the next frame thread starts
|
|
int i, ret = 0;
|
|
|
|
h->max_contexts = h->slice_context_count;
|
|
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)) {
|
|
h->current_slice = 0;
|
|
if (!h->first_field)
|
|
h->cur_pic_ptr = NULL;
|
|
ff_h264_reset_sei(h);
|
|
}
|
|
|
|
ret = ff_h2645_packet_split(&h->pkt, buf, buf_size, avctx, h->is_avc,
|
|
h->nal_length_size, avctx->codec_id);
|
|
if (ret < 0) {
|
|
av_log(avctx, AV_LOG_ERROR,
|
|
"Error splitting the input into NAL units.\n");
|
|
return ret;
|
|
}
|
|
|
|
if (avctx->active_thread_type & FF_THREAD_FRAME)
|
|
nals_needed = get_last_needed_nal(h);
|
|
|
|
for (i = 0; i < h->pkt.nb_nals; i++) {
|
|
H2645NAL *nal = &h->pkt.nals[i];
|
|
H264SliceContext *sl = &h->slice_ctx[context_count];
|
|
int err;
|
|
|
|
if (avctx->skip_frame >= AVDISCARD_NONREF &&
|
|
nal->ref_idc == 0 && nal->type != NAL_SEI)
|
|
continue;
|
|
|
|
again:
|
|
/* Ignore every NAL unit type except PPS and SPS during extradata
|
|
* parsing. Decoding slices is not possible in codec init
|
|
* with frame-mt */
|
|
if (parse_extradata && HAVE_THREADS &&
|
|
(h->avctx->active_thread_type & FF_THREAD_FRAME) &&
|
|
(nal->type != NAL_PPS && nal->type != NAL_SPS)) {
|
|
if (nal->type < NAL_AUD || nal->type > NAL_AUXILIARY_SLICE)
|
|
av_log(avctx, AV_LOG_INFO,
|
|
"Ignoring NAL unit %d during extradata parsing\n",
|
|
nal->type);
|
|
nal->type = NAL_FF_IGNORE;
|
|
}
|
|
|
|
// FIXME these should stop being context-global variables
|
|
h->nal_ref_idc = nal->ref_idc;
|
|
h->nal_unit_type = nal->type;
|
|
|
|
err = 0;
|
|
switch (nal->type) {
|
|
case NAL_IDR_SLICE:
|
|
if (nal->type != NAL_IDR_SLICE) {
|
|
av_log(h->avctx, AV_LOG_ERROR,
|
|
"Invalid mix of idr and non-idr slices\n");
|
|
ret = -1;
|
|
goto end;
|
|
}
|
|
idr(h); // FIXME ensure we don't lose some frames if there is reordering
|
|
case NAL_SLICE:
|
|
sl->gb = nal->gb;
|
|
|
|
if ((err = ff_h264_decode_slice_header(h, sl)))
|
|
break;
|
|
|
|
if (h->sei_recovery_frame_cnt >= 0 && h->recovery_frame < 0) {
|
|
h->recovery_frame = (h->frame_num + h->sei_recovery_frame_cnt) &
|
|
((1 << h->ps.sps->log2_max_frame_num) - 1);
|
|
}
|
|
|
|
h->cur_pic_ptr->f->key_frame |=
|
|
(nal->type == NAL_IDR_SLICE) || (h->sei_recovery_frame_cnt >= 0);
|
|
|
|
if (nal->type == NAL_IDR_SLICE || h->recovery_frame == h->frame_num) {
|
|
h->recovery_frame = -1;
|
|
h->cur_pic_ptr->recovered = 1;
|
|
}
|
|
// If we have an IDR, all frames after it in decoded order are
|
|
// "recovered".
|
|
if (nal->type == NAL_IDR_SLICE)
|
|
h->frame_recovered |= FRAME_RECOVERED_IDR;
|
|
h->cur_pic_ptr->recovered |= !!(h->frame_recovered & FRAME_RECOVERED_IDR);
|
|
|
|
if (h->current_slice == 1) {
|
|
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS))
|
|
decode_postinit(h, i >= nals_needed);
|
|
|
|
if (h->avctx->hwaccel &&
|
|
(ret = h->avctx->hwaccel->start_frame(h->avctx, NULL, 0)) < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (sl->redundant_pic_count == 0 &&
|
|
(avctx->skip_frame < AVDISCARD_NONREF || nal->ref_idc) &&
|
|
(avctx->skip_frame < AVDISCARD_BIDIR ||
|
|
sl->slice_type_nos != AV_PICTURE_TYPE_B) &&
|
|
(avctx->skip_frame < AVDISCARD_NONKEY ||
|
|
h->cur_pic_ptr->f->key_frame) &&
|
|
avctx->skip_frame < AVDISCARD_ALL) {
|
|
if (avctx->hwaccel) {
|
|
ret = avctx->hwaccel->decode_slice(avctx, nal->raw_data, nal->raw_size);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else
|
|
context_count++;
|
|
}
|
|
break;
|
|
case NAL_DPA:
|
|
case NAL_DPB:
|
|
case NAL_DPC:
|
|
avpriv_request_sample(avctx, "data partitioning");
|
|
ret = AVERROR(ENOSYS);
|
|
goto end;
|
|
break;
|
|
case NAL_SEI:
|
|
h->gb = nal->gb;
|
|
ret = ff_h264_decode_sei(h);
|
|
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
|
goto end;
|
|
break;
|
|
case NAL_SPS:
|
|
ret = ff_h264_decode_seq_parameter_set(&nal->gb, avctx, &h->ps);
|
|
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
|
goto end;
|
|
break;
|
|
case NAL_PPS:
|
|
ret = ff_h264_decode_picture_parameter_set(&nal->gb, avctx, &h->ps,
|
|
nal->size_bits);
|
|
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
|
goto end;
|
|
break;
|
|
case NAL_AUD:
|
|
case NAL_END_SEQUENCE:
|
|
case NAL_END_STREAM:
|
|
case NAL_FILLER_DATA:
|
|
case NAL_SPS_EXT:
|
|
case NAL_AUXILIARY_SLICE:
|
|
break;
|
|
case NAL_FF_IGNORE:
|
|
break;
|
|
default:
|
|
av_log(avctx, AV_LOG_DEBUG, "Unknown NAL code: %d (%d bits)\n",
|
|
nal->type, nal->size_bits);
|
|
}
|
|
|
|
if (context_count == h->max_contexts) {
|
|
ret = ff_h264_execute_decode_slices(h, context_count);
|
|
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
|
goto end;
|
|
context_count = 0;
|
|
}
|
|
|
|
if (err < 0) {
|
|
av_log(h->avctx, AV_LOG_ERROR, "decode_slice_header error\n");
|
|
sl->ref_count[0] = sl->ref_count[1] = sl->list_count = 0;
|
|
} else if (err == 1) {
|
|
/* Slice could not be decoded in parallel mode, restart. Note
|
|
* that rbsp_buffer is not transferred, but since we no longer
|
|
* run in parallel mode this should not be an issue. */
|
|
sl = &h->slice_ctx[0];
|
|
goto again;
|
|
}
|
|
}
|
|
if (context_count) {
|
|
ret = ff_h264_execute_decode_slices(h, context_count);
|
|
if (ret < 0 && (h->avctx->err_recognition & AV_EF_EXPLODE))
|
|
goto end;
|
|
}
|
|
|
|
ret = 0;
|
|
end:
|
|
/* clean up */
|
|
if (h->cur_pic_ptr && !h->droppable) {
|
|
ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
|
|
h->picture_structure == PICT_BOTTOM_FIELD);
|
|
}
|
|
|
|
return (ret < 0) ? ret : buf_size;
|
|
}
|
|
|
|
/**
|
|
* Return the number of bytes consumed for building the current frame.
|
|
*/
|
|
static int get_consumed_bytes(int pos, int buf_size)
|
|
{
|
|
if (pos == 0)
|
|
pos = 1; // avoid infinite loops (I doubt that is needed but...)
|
|
if (pos + 10 > buf_size)
|
|
pos = buf_size; // oops ;)
|
|
|
|
return pos;
|
|
}
|
|
|
|
static int output_frame(H264Context *h, AVFrame *dst, AVFrame *src)
|
|
{
|
|
int i;
|
|
int ret = av_frame_ref(dst, src);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (!h->ps.sps || !h->ps.sps->crop)
|
|
return 0;
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
int hshift = (i > 0) ? h->chroma_x_shift : 0;
|
|
int vshift = (i > 0) ? h->chroma_y_shift : 0;
|
|
int off = ((h->ps.sps->crop_left >> hshift) << h->pixel_shift) +
|
|
(h->ps.sps->crop_top >> vshift) * dst->linesize[i];
|
|
dst->data[i] += off;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int h264_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
H264Context *h = avctx->priv_data;
|
|
AVFrame *pict = data;
|
|
int buf_index = 0;
|
|
int ret;
|
|
|
|
h->flags = avctx->flags;
|
|
h->setup_finished = 0;
|
|
|
|
/* end of stream, output what is still in the buffers */
|
|
out:
|
|
if (buf_size == 0) {
|
|
H264Picture *out;
|
|
int i, out_idx;
|
|
|
|
h->cur_pic_ptr = NULL;
|
|
|
|
// FIXME factorize this with the output code below
|
|
out = h->delayed_pic[0];
|
|
out_idx = 0;
|
|
for (i = 1;
|
|
h->delayed_pic[i] &&
|
|
!h->delayed_pic[i]->f->key_frame &&
|
|
!h->delayed_pic[i]->mmco_reset;
|
|
i++)
|
|
if (h->delayed_pic[i]->poc < out->poc) {
|
|
out = h->delayed_pic[i];
|
|
out_idx = i;
|
|
}
|
|
|
|
for (i = out_idx; h->delayed_pic[i]; i++)
|
|
h->delayed_pic[i] = h->delayed_pic[i + 1];
|
|
|
|
if (out) {
|
|
ret = output_frame(h, pict, out->f);
|
|
if (ret < 0)
|
|
return ret;
|
|
*got_frame = 1;
|
|
}
|
|
|
|
return buf_index;
|
|
}
|
|
|
|
buf_index = decode_nal_units(h, buf, buf_size, 0);
|
|
if (buf_index < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (!h->cur_pic_ptr && h->nal_unit_type == NAL_END_SEQUENCE) {
|
|
buf_size = 0;
|
|
goto out;
|
|
}
|
|
|
|
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) && !h->cur_pic_ptr) {
|
|
if (avctx->skip_frame >= AVDISCARD_NONREF)
|
|
return 0;
|
|
av_log(avctx, AV_LOG_ERROR, "no frame!\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if (!(avctx->flags2 & AV_CODEC_FLAG2_CHUNKS) ||
|
|
(h->mb_y >= h->mb_height && h->mb_height)) {
|
|
if (avctx->flags2 & AV_CODEC_FLAG2_CHUNKS)
|
|
decode_postinit(h, 1);
|
|
|
|
ff_h264_field_end(h, &h->slice_ctx[0], 0);
|
|
|
|
*got_frame = 0;
|
|
if (h->next_output_pic && ((avctx->flags & AV_CODEC_FLAG_OUTPUT_CORRUPT) ||
|
|
h->next_output_pic->recovered)) {
|
|
if (!h->next_output_pic->recovered)
|
|
h->next_output_pic->f->flags |= AV_FRAME_FLAG_CORRUPT;
|
|
|
|
ret = output_frame(h, pict, h->next_output_pic->f);
|
|
if (ret < 0)
|
|
return ret;
|
|
*got_frame = 1;
|
|
}
|
|
}
|
|
|
|
assert(pict->buf[0] || !*got_frame);
|
|
|
|
return get_consumed_bytes(buf_index, buf_size);
|
|
}
|
|
|
|
av_cold void ff_h264_free_context(H264Context *h)
|
|
{
|
|
int i;
|
|
|
|
ff_h264_free_tables(h);
|
|
|
|
for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
|
|
ff_h264_unref_picture(h, &h->DPB[i]);
|
|
av_frame_free(&h->DPB[i].f);
|
|
}
|
|
|
|
h->cur_pic_ptr = NULL;
|
|
|
|
for (i = 0; i < h->nb_slice_ctx; i++)
|
|
av_freep(&h->slice_ctx[i].rbsp_buffer);
|
|
av_freep(&h->slice_ctx);
|
|
h->nb_slice_ctx = 0;
|
|
|
|
for (i = 0; i < MAX_SPS_COUNT; i++)
|
|
av_buffer_unref(&h->ps.sps_list[i]);
|
|
|
|
for (i = 0; i < MAX_PPS_COUNT; i++)
|
|
av_buffer_unref(&h->ps.pps_list[i]);
|
|
|
|
ff_h2645_packet_uninit(&h->pkt);
|
|
}
|
|
|
|
static av_cold int h264_decode_end(AVCodecContext *avctx)
|
|
{
|
|
H264Context *h = avctx->priv_data;
|
|
|
|
ff_h264_free_context(h);
|
|
|
|
ff_h264_unref_picture(h, &h->cur_pic);
|
|
av_frame_free(&h->cur_pic.f);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(H264Context, x)
|
|
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
|
|
static const AVOption h264_options[] = {
|
|
{ "enable_er", "Enable error resilience on damaged frames (unsafe)", OFFSET(enable_er), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VD },
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVClass h264_class = {
|
|
.class_name = "h264",
|
|
.item_name = av_default_item_name,
|
|
.option = h264_options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
|
|
AVCodec ff_h264_decoder = {
|
|
.name = "h264",
|
|
.long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_H264,
|
|
.priv_data_size = sizeof(H264Context),
|
|
.init = ff_h264_decode_init,
|
|
.close = h264_decode_end,
|
|
.decode = h264_decode_frame,
|
|
.capabilities = /*AV_CODEC_CAP_DRAW_HORIZ_BAND |*/ AV_CODEC_CAP_DR1 |
|
|
AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS |
|
|
AV_CODEC_CAP_FRAME_THREADS,
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
|
|
.flush = flush_dpb,
|
|
.init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy),
|
|
.update_thread_context = ONLY_IF_THREADS_ENABLED(ff_h264_update_thread_context),
|
|
.profiles = NULL_IF_CONFIG_SMALL(ff_h264_profiles),
|
|
.priv_class = &h264_class,
|
|
};
|