FFmpeg
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h264_picture.c
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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 / MPEG4 part10 codec.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27 
28 #include "libavutil/avassert.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/timer.h"
31 #include "internal.h"
32 #include "cabac.h"
33 #include "cabac_functions.h"
34 #include "error_resilience.h"
35 #include "avcodec.h"
36 #include "h264.h"
37 #include "h264data.h"
38 #include "h264chroma.h"
39 #include "h264_mvpred.h"
40 #include "golomb.h"
41 #include "mathops.h"
42 #include "mpegutils.h"
43 #include "rectangle.h"
44 #include "thread.h"
45 #include "vdpau_internal.h"
46 
48 {
49  int off = offsetof(H264Picture, tf) + sizeof(pic->tf);
50  int i;
51 
52  if (!pic->f.buf[0])
53  return;
54 
57 
60  for (i = 0; i < 2; i++) {
63  }
64 
65  memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
66 }
67 
69 {
70  int ret, i;
71 
72  av_assert0(!dst->f.buf[0]);
73  av_assert0(src->f.buf[0]);
74 
75  src->tf.f = &src->f;
76  dst->tf.f = &dst->f;
77  ret = ff_thread_ref_frame(&dst->tf, &src->tf);
78  if (ret < 0)
79  goto fail;
80 
83  if (!dst->qscale_table_buf || !dst->mb_type_buf)
84  goto fail;
85  dst->qscale_table = src->qscale_table;
86  dst->mb_type = src->mb_type;
87 
88  for (i = 0; i < 2; i++) {
89  dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
90  dst->ref_index_buf[i] = av_buffer_ref(src->ref_index_buf[i]);
91  if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i])
92  goto fail;
93  dst->motion_val[i] = src->motion_val[i];
94  dst->ref_index[i] = src->ref_index[i];
95  }
96 
97  if (src->hwaccel_picture_private) {
99  if (!dst->hwaccel_priv_buf)
100  goto fail;
102  }
103 
104  for (i = 0; i < 2; i++)
105  dst->field_poc[i] = src->field_poc[i];
106 
107  memcpy(dst->ref_poc, src->ref_poc, sizeof(src->ref_poc));
108  memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
109 
110  dst->poc = src->poc;
111  dst->frame_num = src->frame_num;
112  dst->mmco_reset = src->mmco_reset;
113  dst->pic_id = src->pic_id;
114  dst->long_ref = src->long_ref;
115  dst->mbaff = src->mbaff;
116  dst->field_picture = src->field_picture;
117  dst->needs_realloc = src->needs_realloc;
118  dst->reference = src->reference;
119  dst->crop = src->crop;
120  dst->crop_left = src->crop_left;
121  dst->crop_top = src->crop_top;
122  dst->recovered = src->recovered;
123  dst->invalid_gap = src->invalid_gap;
125 
126  return 0;
127 fail:
128  ff_h264_unref_picture(h, dst);
129  return ret;
130 }
131 
133 {
134 #if CONFIG_ERROR_RESILIENCE
135  int i;
136 
137  memset(dst, 0, sizeof(*dst));
138 
139  if (!src)
140  return;
141 
142  dst->f = &src->f;
143  dst->tf = &src->tf;
144 
145  for (i = 0; i < 2; i++) {
146  dst->motion_val[i] = src->motion_val[i];
147  dst->ref_index[i] = src->ref_index[i];
148  }
149 
150  dst->mb_type = src->mb_type;
151  dst->field_picture = src->field_picture;
152 #endif /* CONFIG_ERROR_RESILIENCE */
153 }
154 
155 int ff_h264_field_end(H264Context *h, int in_setup)
156 {
157  AVCodecContext *const avctx = h->avctx;
158  int err = 0;
159  h->mb_y = 0;
160 
161  if (CONFIG_H264_VDPAU_DECODER &&
164 
165  if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
166  if (!h->droppable) {
168  h->prev_poc_msb = h->poc_msb;
169  h->prev_poc_lsb = h->poc_lsb;
170  }
172  h->prev_frame_num = h->frame_num;
174  }
175 
176  if (avctx->hwaccel) {
177  if (avctx->hwaccel->end_frame(avctx) < 0)
178  av_log(avctx, AV_LOG_ERROR,
179  "hardware accelerator failed to decode picture\n");
180  }
181 
182  if (CONFIG_H264_VDPAU_DECODER &&
185 
186 #if CONFIG_ERROR_RESILIENCE
187  /*
188  * FIXME: Error handling code does not seem to support interlaced
189  * when slices span multiple rows
190  * The ff_er_add_slice calls don't work right for bottom
191  * fields; they cause massive erroneous error concealing
192  * Error marking covers both fields (top and bottom).
193  * This causes a mismatched s->error_count
194  * and a bad error table. Further, the error count goes to
195  * INT_MAX when called for bottom field, because mb_y is
196  * past end by one (callers fault) and resync_mb_y != 0
197  * causes problems for the first MB line, too.
198  */
199  if (!FIELD_PICTURE(h) && h->current_slice && !h->sps.new) {
201  ff_er_frame_end(&h->er);
202  }
203 #endif /* CONFIG_ERROR_RESILIENCE */
204 
205  if (!in_setup && !h->droppable)
208  emms_c();
209 
210  h->current_slice = 0;
211 
212  return err;
213 }