forked from KolibriOS/kolibrios
239 lines
7.5 KiB
C
239 lines
7.5 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 FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* H.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/imgutils.h"
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#include "libavutil/timer.h"
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#include "internal.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 "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 "mpegutils.h"
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#include "rectangle.h"
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#include "thread.h"
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#include "vdpau_compat.h"
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void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
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{
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int off = offsetof(H264Picture, tf) + sizeof(pic->tf);
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int i;
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if (!pic->f || !pic->f->buf[0])
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return;
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ff_thread_release_buffer(h->avctx, &pic->tf);
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av_buffer_unref(&pic->hwaccel_priv_buf);
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av_buffer_unref(&pic->qscale_table_buf);
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av_buffer_unref(&pic->mb_type_buf);
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for (i = 0; i < 2; i++) {
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av_buffer_unref(&pic->motion_val_buf[i]);
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av_buffer_unref(&pic->ref_index_buf[i]);
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}
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memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
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}
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int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
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{
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int ret, i;
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av_assert0(!dst->f->buf[0]);
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av_assert0(src->f->buf[0]);
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src->tf.f = src->f;
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dst->tf.f = dst->f;
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ret = ff_thread_ref_frame(&dst->tf, &src->tf);
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if (ret < 0)
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goto fail;
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dst->qscale_table_buf = av_buffer_ref(src->qscale_table_buf);
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dst->mb_type_buf = av_buffer_ref(src->mb_type_buf);
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if (!dst->qscale_table_buf || !dst->mb_type_buf)
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goto fail;
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dst->qscale_table = src->qscale_table;
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dst->mb_type = src->mb_type;
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for (i = 0; i < 2; i++) {
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dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
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dst->ref_index_buf[i] = av_buffer_ref(src->ref_index_buf[i]);
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if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i])
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goto fail;
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dst->motion_val[i] = src->motion_val[i];
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dst->ref_index[i] = src->ref_index[i];
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}
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if (src->hwaccel_picture_private) {
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dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
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if (!dst->hwaccel_priv_buf)
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goto fail;
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dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
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}
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for (i = 0; i < 2; i++)
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dst->field_poc[i] = src->field_poc[i];
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memcpy(dst->ref_poc, src->ref_poc, sizeof(src->ref_poc));
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memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
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dst->poc = src->poc;
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dst->frame_num = src->frame_num;
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dst->mmco_reset = src->mmco_reset;
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dst->pic_id = src->pic_id;
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dst->long_ref = src->long_ref;
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dst->mbaff = src->mbaff;
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dst->field_picture = src->field_picture;
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dst->reference = src->reference;
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dst->crop = src->crop;
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dst->crop_left = src->crop_left;
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dst->crop_top = src->crop_top;
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dst->recovered = src->recovered;
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dst->invalid_gap = src->invalid_gap;
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dst->sei_recovery_frame_cnt = src->sei_recovery_frame_cnt;
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return 0;
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fail:
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ff_h264_unref_picture(h, dst);
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return ret;
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}
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void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
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{
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#if CONFIG_ERROR_RESILIENCE
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int i;
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memset(dst, 0, sizeof(*dst));
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if (!src)
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return;
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dst->f = src->f;
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dst->tf = &src->tf;
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for (i = 0; i < 2; i++) {
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dst->motion_val[i] = src->motion_val[i];
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dst->ref_index[i] = src->ref_index[i];
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}
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dst->mb_type = src->mb_type;
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dst->field_picture = src->field_picture;
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#endif /* CONFIG_ERROR_RESILIENCE */
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}
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int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
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{
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AVCodecContext *const avctx = h->avctx;
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int err = 0;
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h->mb_y = 0;
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#if FF_API_CAP_VDPAU
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if (CONFIG_H264_VDPAU_DECODER &&
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h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU)
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ff_vdpau_h264_set_reference_frames(h);
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#endif
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if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
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if (!h->droppable) {
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err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
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h->prev_poc_msb = h->poc_msb;
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h->prev_poc_lsb = h->poc_lsb;
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}
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h->prev_frame_num_offset = h->frame_num_offset;
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h->prev_frame_num = h->frame_num;
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}
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if (avctx->hwaccel) {
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err = avctx->hwaccel->end_frame(avctx);
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if (err < 0)
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av_log(avctx, AV_LOG_ERROR,
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"hardware accelerator failed to decode picture\n");
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}
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#if FF_API_CAP_VDPAU
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if (CONFIG_H264_VDPAU_DECODER &&
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h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU)
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ff_vdpau_h264_picture_complete(h);
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#endif
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#if CONFIG_ERROR_RESILIENCE
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av_assert0(sl == h->slice_ctx);
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/*
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* FIXME: Error handling code does not seem to support interlaced
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* when slices span multiple rows
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* The ff_er_add_slice calls don't work right for bottom
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* fields; they cause massive erroneous error concealing
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* Error marking covers both fields (top and bottom).
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* This causes a mismatched s->error_count
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* and a bad error table. Further, the error count goes to
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* INT_MAX when called for bottom field, because mb_y is
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* past end by one (callers fault) and resync_mb_y != 0
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* causes problems for the first MB line, too.
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*/
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if (!FIELD_PICTURE(h) && h->current_slice && !h->sps.new && h->enable_er) {
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int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
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ff_h264_set_erpic(&sl->er.cur_pic, h->cur_pic_ptr);
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if (use_last_pic) {
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ff_h264_set_erpic(&sl->er.last_pic, &h->last_pic_for_ec);
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sl->ref_list[0][0].parent = &h->last_pic_for_ec;
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memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
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memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
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sl->ref_list[0][0].reference = h->last_pic_for_ec.reference;
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} else if (sl->ref_count[0]) {
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ff_h264_set_erpic(&sl->er.last_pic, sl->ref_list[0][0].parent);
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} else
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ff_h264_set_erpic(&sl->er.last_pic, NULL);
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if (sl->ref_count[1])
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ff_h264_set_erpic(&sl->er.next_pic, sl->ref_list[1][0].parent);
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sl->er.ref_count = sl->ref_count[0];
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ff_er_frame_end(&sl->er);
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if (use_last_pic)
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memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
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}
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#endif /* CONFIG_ERROR_RESILIENCE */
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if (!in_setup && !h->droppable)
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ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
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h->picture_structure == PICT_BOTTOM_FIELD);
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emms_c();
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h->current_slice = 0;
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return err;
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}
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