libavcodec/h264_picture.c

   1 /*
   2  * H.26L/H.264/AVC/JVT/14496-10/... decoder
   3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file
  24  * H.264 / AVC / MPEG-4 part10 codec.
  25  * @author Michael Niedermayer <michaelni@gmx.at>
  26  */
  27
  28 #include "libavutil/avassert.h"
  29 #include "libavutil/emms.h"
  30 #include "error_resilience.h"
  31 #include "avcodec.h"
  32 #include "h264dec.h"
  33 #include "hwaccel_internal.h"
  34 #include "mpegutils.h"
  35 #include "libavutil/refstruct.h"
  36 #include "thread.h"
  37 #include "threadframe.h"
  38
  39 void ff_h264_unref_picture(H264Picture *pic)
  40 {
  41     int off = offsetof(H264Picture, f_grain) + sizeof(pic->f_grain);
  42     int i;
  43
  44     if (!pic->f || !pic->f->buf[0])
  45         return;
  46
  47     ff_thread_release_ext_buffer(&pic->tf);
  48     av_frame_unref(pic->f_grain);
  49     av_refstruct_unref(&pic->hwaccel_picture_private);
  50
  51     av_refstruct_unref(&pic->qscale_table_base);
  52     av_refstruct_unref(&pic->mb_type_base);
  53     av_refstruct_unref(&pic->pps);
  54     for (i = 0; i < 2; i++) {
  55         av_refstruct_unref(&pic->motion_val_base[i]);
  56         av_refstruct_unref(&pic->ref_index[i]);
  57     }
  58     av_refstruct_unref(&pic->decode_error_flags);
  59
  60     memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
  61 }
  62
  63 static void h264_copy_picture_params(H264Picture *dst, const H264Picture *src)
  64 {
  65     av_refstruct_replace(&dst->qscale_table_base, src->qscale_table_base);
  66     av_refstruct_replace(&dst->mb_type_base,      src->mb_type_base);
  67     av_refstruct_replace(&dst->pps, src->pps);
  68
  69     for (int i = 0; i < 2; i++) {
  70         av_refstruct_replace(&dst->motion_val_base[i], src->motion_val_base[i]);
  71         av_refstruct_replace(&dst->ref_index[i],       src->ref_index[i]);
  72     }
  73
  74     av_refstruct_replace(&dst->hwaccel_picture_private,
  75                           src->hwaccel_picture_private);
  76
  77     av_refstruct_replace(&dst->decode_error_flags, src->decode_error_flags);
  78
  79     dst->qscale_table = src->qscale_table;
  80     dst->mb_type      = src->mb_type;
  81
  82     for (int i = 0; i < 2; i++)
  83         dst->motion_val[i] = src->motion_val[i];
  84
  85     for (int i = 0; i < 2; i++)
  86         dst->field_poc[i] = src->field_poc[i];
  87
  88     memcpy(dst->ref_poc,   src->ref_poc,   sizeof(src->ref_poc));
  89     memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
  90
  91     dst->poc           = src->poc;
  92     dst->frame_num     = src->frame_num;
  93     dst->mmco_reset    = src->mmco_reset;
  94     dst->long_ref      = src->long_ref;
  95     dst->mbaff         = src->mbaff;
  96     dst->field_picture = src->field_picture;
  97     dst->reference     = src->reference;
  98     dst->recovered     = src->recovered;
  99     dst->gray          = src->gray;
 100     dst->invalid_gap   = src->invalid_gap;
 101     dst->sei_recovery_frame_cnt = src->sei_recovery_frame_cnt;
 102     dst->mb_width      = src->mb_width;
 103     dst->mb_height     = src->mb_height;
 104     dst->mb_stride     = src->mb_stride;
 105     dst->needs_fg      = src->needs_fg;
 106 }
 107
 108 int ff_h264_ref_picture(H264Picture *dst, const H264Picture *src)
 109 {
 110     int ret;
 111
 112     av_assert0(!dst->f->buf[0]);
 113     av_assert0(src->f->buf[0]);
 114     av_assert0(src->tf.f == src->f);
 115
 116     dst->tf.f = dst->f;
 117     ret = ff_thread_ref_frame(&dst->tf, &src->tf);
 118     if (ret < 0)
 119         goto fail;
 120
 121     if (src->needs_fg) {
 122         ret = av_frame_ref(dst->f_grain, src->f_grain);
 123         if (ret < 0)
 124             goto fail;
 125     }
 126
 127     h264_copy_picture_params(dst, src);
 128
 129     return 0;
 130 fail:
 131     ff_h264_unref_picture(dst);
 132     return ret;
 133 }
 134
 135 int ff_h264_replace_picture(H264Picture *dst, const H264Picture *src)
 136 {
 137     int ret;
 138
 139     if (!src->f || !src->f->buf[0]) {
 140         ff_h264_unref_picture(dst);
 141         return 0;
 142     }
 143
 144     av_assert0(src->tf.f == src->f);
 145
 146     dst->tf.f = dst->f;
 147     ret = ff_thread_replace_frame(&dst->tf, &src->tf);
 148     if (ret < 0)
 149         goto fail;
 150
 151     if (src->needs_fg) {
 152         av_frame_unref(dst->f_grain);
 153         ret = av_frame_ref(dst->f_grain, src->f_grain);
 154         if (ret < 0)
 155             goto fail;
 156     }
 157
 158     h264_copy_picture_params(dst, src);
 159
 160     return 0;
 161 fail:
 162     ff_h264_unref_picture(dst);
 163     return ret;
 164 }
 165
 166 void ff_h264_set_erpic(ERPicture *dst, const H264Picture *src)
 167 {
 168 #if CONFIG_ERROR_RESILIENCE
 169     int i;
 170
 171     memset(dst, 0, sizeof(*dst));
 172
 173     if (!src)
 174         return;
 175
 176     dst->f = src->f;
 177     dst->tf = &src->tf;
 178
 179     for (i = 0; i < 2; i++) {
 180         dst->motion_val[i] = src->motion_val[i];
 181         dst->ref_index[i] = src->ref_index[i];
 182     }
 183
 184     dst->mb_type = src->mb_type;
 185     dst->field_picture = src->field_picture;
 186 #endif /* CONFIG_ERROR_RESILIENCE */
 187 }
 188
 189 int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
 190 {
 191     AVCodecContext *const avctx = h->avctx;
 192     H264Picture *cur = h->cur_pic_ptr;
 193     int err = 0;
 194     h->mb_y = 0;
 195
 196     if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
 197         if (!h->droppable) {
 198             err = ff_h264_execute_ref_pic_marking(h);
 199             h->poc.prev_poc_msb = h->poc.poc_msb;
 200             h->poc.prev_poc_lsb = h->poc.poc_lsb;
 201         }
 202         h->poc.prev_frame_num_offset = h->poc.frame_num_offset;
 203         h->poc.prev_frame_num        = h->poc.frame_num;
 204     }
 205
 206     if (avctx->hwaccel) {
 207         err = FF_HW_SIMPLE_CALL(avctx, end_frame);
 208         if (err < 0)
 209             av_log(avctx, AV_LOG_ERROR,
 210                    "hardware accelerator failed to decode picture\n");
 211     } else if (!in_setup && cur->needs_fg && (!FIELD_PICTURE(h) || !h->first_field)) {
 212         const AVFrameSideData *sd = av_frame_get_side_data(cur->f, AV_FRAME_DATA_FILM_GRAIN_PARAMS);
 213
 214         err = AVERROR_INVALIDDATA;
 215         if (sd) // a decoding error may have happened before the side data could be allocated
 216             err = ff_h274_apply_film_grain(cur->f_grain, cur->f, &h->h274db,
 217                                            (AVFilmGrainParams *) sd->data);
 218         if (err < 0) {
 219             av_log(h->avctx, AV_LOG_WARNING, "Failed synthesizing film "
 220                    "grain, ignoring: %s\n", av_err2str(err));
 221             cur->needs_fg = 0;
 222             err = 0;
 223         }
 224     }
 225
 226     if (!in_setup && !h->droppable)
 227         ff_thread_report_progress(&cur->tf, INT_MAX,
 228                                   h->picture_structure == PICT_BOTTOM_FIELD);
 229     emms_c();
 230
 231     h->current_slice = 0;
 232
 233     return err;
 234 }