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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 / MPEG-4 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 "h264dec.h"
37 #include "h264data.h"
38 #include "h264chroma.h"
39 #include "h264_mvpred.h"
40 #include "mathops.h"
41 #include "mpegutils.h"
42 #include "rectangle.h"
43 #include "thread.h"
44 
46 {
47  int off = offsetof(H264Picture, tf) + sizeof(pic->tf);
48  int i;
49 
50  if (!pic->f || !pic->f->buf[0])
51  return;
52 
55 
58  for (i = 0; i < 2; i++) {
61  }
62 
63  memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
64 }
65 
67 {
68  int ret, i;
69 
70  av_assert0(!dst->f->buf[0]);
71  av_assert0(src->f->buf[0]);
72  av_assert0(src->tf.f == src->f);
73 
74  dst->tf.f = dst->f;
75  ret = ff_thread_ref_frame(&dst->tf, &src->tf);
76  if (ret < 0)
77  goto fail;
78 
81  if (!dst->qscale_table_buf || !dst->mb_type_buf) {
82  ret = AVERROR(ENOMEM);
83  goto fail;
84  }
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  ret = AVERROR(ENOMEM);
93  goto fail;
94  }
95  dst->motion_val[i] = src->motion_val[i];
96  dst->ref_index[i] = src->ref_index[i];
97  }
98 
99  if (src->hwaccel_picture_private) {
101  if (!dst->hwaccel_priv_buf) {
102  ret = AVERROR(ENOMEM);
103  goto fail;
104  }
106  }
107 
108  for (i = 0; i < 2; i++)
109  dst->field_poc[i] = src->field_poc[i];
110 
111  memcpy(dst->ref_poc, src->ref_poc, sizeof(src->ref_poc));
112  memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
113 
114  dst->poc = src->poc;
115  dst->frame_num = src->frame_num;
116  dst->mmco_reset = src->mmco_reset;
117  dst->long_ref = src->long_ref;
118  dst->mbaff = src->mbaff;
119  dst->field_picture = src->field_picture;
120  dst->reference = src->reference;
121  dst->recovered = src->recovered;
122  dst->invalid_gap = src->invalid_gap;
124 
125  return 0;
126 fail:
127  ff_h264_unref_picture(h, dst);
128  return ret;
129 }
130 
132 {
133 #if CONFIG_ERROR_RESILIENCE
134  int i;
135 
136  memset(dst, 0, sizeof(*dst));
137 
138  if (!src)
139  return;
140 
141  dst->f = src->f;
142  dst->tf = &src->tf;
143 
144  for (i = 0; i < 2; i++) {
145  dst->motion_val[i] = src->motion_val[i];
146  dst->ref_index[i] = src->ref_index[i];
147  }
148 
149  dst->mb_type = src->mb_type;
150  dst->field_picture = src->field_picture;
151 #endif /* CONFIG_ERROR_RESILIENCE */
152 }
153 
155 {
156  AVCodecContext *const avctx = h->avctx;
157  int err = 0;
158  h->mb_y = 0;
159 
160  if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
161  if (!h->droppable) {
163  h->poc.prev_poc_msb = h->poc.poc_msb;
164  h->poc.prev_poc_lsb = h->poc.poc_lsb;
165  }
168  }
169 
170  if (avctx->hwaccel) {
171  err = avctx->hwaccel->end_frame(avctx);
172  if (err < 0)
173  av_log(avctx, AV_LOG_ERROR,
174  "hardware accelerator failed to decode picture\n");
175  }
176 
177  if (!in_setup && !h->droppable)
180  emms_c();
181 
182  h->current_slice = 0;
183 
184  return err;
185 }
int long_ref
1->long term reference 0->short term reference
Definition: h264dec.h:154
int sei_recovery_frame_cnt
Definition: h264dec.h:163
H264POCContext poc
Definition: h264dec.h:460
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
misc image utilities
AVFrame * f
Definition: thread.h:36
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:393
int mb_y
Definition: h264dec.h:434
AVBufferRef * mb_type_buf
Definition: h264dec.h:138
int16_t(*[2] motion_val)[2]
Definition: h264dec.h:136
uint32_t * mb_type
H264Context.
Definition: h264dec.h:337
AVFrame * f
Definition: h264dec.h:129
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2644
#define src
Definition: vp8dsp.c:254
int picture_structure
Definition: h264dec.h:407
#define tf
Definition: regdef.h:73
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
uint8_t
void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
Definition: h264_picture.c:131
int field_picture
whether or not picture was encoded in separate fields
Definition: h264dec.h:158
int poc
frame POC
Definition: h264dec.h:148
int frame_num_offset
for POC type 2
Definition: h264_parse.h:51
Multithreading support functions.
int invalid_gap
Definition: h264dec.h:162
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:38
int ff_thread_ref_frame(ThreadFrame *dst, ThreadFrame *src)
Definition: utils.c:2012
AVBufferRef * qscale_table_buf
Definition: h264dec.h:132
high precision timer, useful to profile code
int recovered
picture at IDR or recovery point + recovery count
Definition: h264dec.h:161
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
void ff_thread_release_buffer(AVCodecContext *avctx, ThreadFrame *f)
Wrapper around release_buffer() frame-for multithreaded codecs.
#define AVERROR(e)
Definition: error.h:43
void * hwaccel_picture_private
hardware accelerator private data
Definition: h264dec.h:142
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2758
int ref_poc[2][2][32]
POCs of the frames/fields used as reference (FIXME need per slice)
Definition: h264dec.h:155
ThreadFrame tf
Definition: h264dec.h:130
simple assert() macros that are a bit more flexible than ISO C assert().
ThreadFrame * tf
int frame_num
frame_num (raw frame_num from slice header)
Definition: h264dec.h:149
#define fail()
Definition: checkasm.h:113
AVBufferRef * hwaccel_priv_buf
Definition: h264dec.h:141
useful rectangle filling function
int prev_poc_msb
poc_msb of the last reference pic for POC type 0
Definition: h264_parse.h:49
AVBufferRef * motion_val_buf[2]
Definition: h264dec.h:135
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:2750
int reference
Definition: h264dec.h:160
uint32_t * mb_type
Definition: h264dec.h:139
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
Context Adaptive Binary Arithmetic Coder inline functions.
H.264 / AVC / MPEG-4 part10 codec.
AVCodecContext * avctx
Definition: h264dec.h:339
Libavcodec external API header.
int field_poc[2]
top/bottom POC
Definition: h264dec.h:147
main external API structure.
Definition: avcodec.h:1488
uint8_t * data
The data buffer.
Definition: buffer.h:89
int8_t * qscale_table
Definition: h264dec.h:133
int prev_frame_num
frame_num of the last pic for POC type 1/2
Definition: h264_parse.h:53
int8_t * ref_index[2]
Definition: h264dec.h:145
int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
Definition: h264_picture.c:66
int mmco_reset
MMCO_RESET set this 1.
Definition: h264dec.h:150
H264Picture * cur_pic_ptr
Definition: h264dec.h:346
int8_t * ref_index[2]
int prev_poc_lsb
poc_lsb of the last reference pic for POC type 0
Definition: h264_parse.h:50
int mbaff
1 -> MBAFF frame 0-> not MBAFF
Definition: h264dec.h:157
int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
Definition: h264_picture.c:154
common internal api header.
H.264 / AVC / MPEG-4 part10 motion vector prediction.
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
AVFrame * f
int16_t(*[2] motion_val)[2]
int current_slice
current slice number, used to initialize slice_num of each thread/context
Definition: h264dec.h:488
int ff_h264_execute_ref_pic_marking(H264Context *h)
Execute the reference picture marking (memory management control operations).
Definition: h264_refs.c:608
AVBufferRef * ref_index_buf[2]
Definition: h264dec.h:144
int ref_count[2][2]
number of entries in ref_poc (FIXME need per slice)
Definition: h264dec.h:156
int prev_frame_num_offset
for POC type 2
Definition: h264_parse.h:52
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:3605
void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
Definition: h264_picture.c:45
int droppable
Definition: h264dec.h:362
Context Adaptive Binary Arithmetic Coder.