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ffmpeg/libavcodec/h264_picture.c

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/*
* H.26L/H.264/AVC/JVT/14496-10/... decoder
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* H.264 / AVC / MPEG4 part10 codec.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/timer.h"
#include "internal.h"
#include "cabac.h"
#include "cabac_functions.h"
#include "error_resilience.h"
#include "avcodec.h"
#include "h264.h"
#include "h264data.h"
#include "h264chroma.h"
#include "h264_mvpred.h"
#include "golomb.h"
#include "mathops.h"
#include "mpegutils.h"
#include "rectangle.h"
#include "thread.h"
#include "vdpau_compat.h"
void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
{
int off = offsetof(H264Picture, tf) + sizeof(pic->tf);
int i;
if (!pic->f || !pic->f->buf[0])
return;
ff_thread_release_buffer(h->avctx, &pic->tf);
av_buffer_unref(&pic->hwaccel_priv_buf);
av_buffer_unref(&pic->qscale_table_buf);
av_buffer_unref(&pic->mb_type_buf);
for (i = 0; i < 2; i++) {
av_buffer_unref(&pic->motion_val_buf[i]);
av_buffer_unref(&pic->ref_index_buf[i]);
}
memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
}
int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
{
int ret, i;
av_assert0(!dst->f->buf[0]);
av_assert0(src->f->buf[0]);
src->tf.f = src->f;
dst->tf.f = dst->f;
ret = ff_thread_ref_frame(&dst->tf, &src->tf);
if (ret < 0)
goto fail;
dst->qscale_table_buf = av_buffer_ref(src->qscale_table_buf);
dst->mb_type_buf = av_buffer_ref(src->mb_type_buf);
if (!dst->qscale_table_buf || !dst->mb_type_buf)
goto fail;
dst->qscale_table = src->qscale_table;
dst->mb_type = src->mb_type;
for (i = 0; i < 2; i++) {
dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
dst->ref_index_buf[i] = av_buffer_ref(src->ref_index_buf[i]);
if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i])
goto fail;
dst->motion_val[i] = src->motion_val[i];
dst->ref_index[i] = src->ref_index[i];
}
if (src->hwaccel_picture_private) {
dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
if (!dst->hwaccel_priv_buf)
goto fail;
dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
}
for (i = 0; i < 2; i++)
dst->field_poc[i] = src->field_poc[i];
memcpy(dst->ref_poc, src->ref_poc, sizeof(src->ref_poc));
memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
dst->poc = src->poc;
dst->frame_num = src->frame_num;
dst->mmco_reset = src->mmco_reset;
dst->pic_id = src->pic_id;
dst->long_ref = src->long_ref;
dst->mbaff = src->mbaff;
dst->field_picture = src->field_picture;
dst->reference = src->reference;
dst->crop = src->crop;
dst->crop_left = src->crop_left;
dst->crop_top = src->crop_top;
dst->recovered = src->recovered;
dst->invalid_gap = src->invalid_gap;
dst->sei_recovery_frame_cnt = src->sei_recovery_frame_cnt;
return 0;
fail:
ff_h264_unref_picture(h, dst);
return ret;
}
void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
{
#if CONFIG_ERROR_RESILIENCE
int i;
memset(dst, 0, sizeof(*dst));
if (!src)
return;
dst->f = src->f;
dst->tf = &src->tf;
for (i = 0; i < 2; i++) {
dst->motion_val[i] = src->motion_val[i];
dst->ref_index[i] = src->ref_index[i];
}
dst->mb_type = src->mb_type;
dst->field_picture = src->field_picture;
#endif /* CONFIG_ERROR_RESILIENCE */
}
int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
{
AVCodecContext *const avctx = h->avctx;
int err = 0;
h->mb_y = 0;
if (CONFIG_H264_VDPAU_DECODER &&
h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
ff_vdpau_h264_set_reference_frames(h);
if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
if (!h->droppable) {
err = ff_h264_execute_ref_pic_marking(h, h->mmco, h->mmco_index);
h->prev_poc_msb = h->poc_msb;
h->prev_poc_lsb = h->poc_lsb;
}
h->prev_frame_num_offset = h->frame_num_offset;
h->prev_frame_num = h->frame_num;
}
if (avctx->hwaccel) {
if (avctx->hwaccel->end_frame(avctx) < 0)
av_log(avctx, AV_LOG_ERROR,
"hardware accelerator failed to decode picture\n");
}
if (CONFIG_H264_VDPAU_DECODER &&
h->avctx->codec->capabilities & CODEC_CAP_HWACCEL_VDPAU)
ff_vdpau_h264_picture_complete(h);
#if CONFIG_ERROR_RESILIENCE
av_assert0(sl == h->slice_ctx);
/*
* FIXME: Error handling code does not seem to support interlaced
* when slices span multiple rows
* The ff_er_add_slice calls don't work right for bottom
* fields; they cause massive erroneous error concealing
* Error marking covers both fields (top and bottom).
* This causes a mismatched s->error_count
* and a bad error table. Further, the error count goes to
* INT_MAX when called for bottom field, because mb_y is
* past end by one (callers fault) and resync_mb_y != 0
* causes problems for the first MB line, too.
*/
if (!FIELD_PICTURE(h) && h->current_slice && !h->sps.new && h->enable_er) {
int use_last_pic = h->last_pic_for_ec.f->buf[0] && !sl->ref_count[0];
ff_h264_set_erpic(&sl->er.cur_pic, h->cur_pic_ptr);
if (use_last_pic) {
ff_h264_set_erpic(&sl->er.last_pic, &h->last_pic_for_ec);
sl->ref_list[0][0].parent = &h->last_pic_for_ec;
memcpy(sl->ref_list[0][0].data, h->last_pic_for_ec.f->data, sizeof(sl->ref_list[0][0].data));
memcpy(sl->ref_list[0][0].linesize, h->last_pic_for_ec.f->linesize, sizeof(sl->ref_list[0][0].linesize));
sl->ref_list[0][0].reference = h->last_pic_for_ec.reference;
} else if (sl->ref_count[0]) {
ff_h264_set_erpic(&sl->er.last_pic, sl->ref_list[0][0].parent);
} else
ff_h264_set_erpic(&sl->er.last_pic, NULL);
if (sl->ref_count[1])
ff_h264_set_erpic(&sl->er.next_pic, sl->ref_list[1][0].parent);
sl->er.ref_count = sl->ref_count[0];
ff_er_frame_end(&sl->er);
if (use_last_pic)
memset(&sl->ref_list[0][0], 0, sizeof(sl->ref_list[0][0]));
}
#endif /* CONFIG_ERROR_RESILIENCE */
if (!in_setup && !h->droppable)
ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
h->picture_structure == PICT_BOTTOM_FIELD);
emms_c();
h->current_slice = 0;
return err;
}
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