FFmpeg
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 "error_resilience.h"
30 #include "avcodec.h"
31 #include "h264dec.h"
32 #include "mpegutils.h"
33 #include "thread.h"
34 #include "threadframe.h"
35 
37 {
38  int off = offsetof(H264Picture, f_grain) + sizeof(pic->f_grain);
39  int i;
40 
41  if (!pic->f || !pic->f->buf[0])
42  return;
43 
44  ff_thread_release_ext_buffer(h->avctx, &pic->tf);
45  ff_thread_release_buffer(h->avctx, pic->f_grain);
47 
50  av_buffer_unref(&pic->pps_buf);
51  for (i = 0; i < 2; i++) {
54  }
55 
56  memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
57 }
58 
60 {
61  dst->qscale_table = src->qscale_table;
62  dst->mb_type = src->mb_type;
63  dst->pps = src->pps;
64 
65  for (int i = 0; i < 2; i++) {
66  dst->motion_val[i] = src->motion_val[i];
67  dst->ref_index[i] = src->ref_index[i];
68  }
69 
70  for (int i = 0; i < 2; i++)
71  dst->field_poc[i] = src->field_poc[i];
72 
73  memcpy(dst->ref_poc, src->ref_poc, sizeof(src->ref_poc));
74  memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
75 
76  dst->poc = src->poc;
77  dst->frame_num = src->frame_num;
78  dst->mmco_reset = src->mmco_reset;
79  dst->long_ref = src->long_ref;
80  dst->mbaff = src->mbaff;
81  dst->field_picture = src->field_picture;
82  dst->reference = src->reference;
83  dst->recovered = src->recovered;
84  dst->invalid_gap = src->invalid_gap;
85  dst->sei_recovery_frame_cnt = src->sei_recovery_frame_cnt;
86  dst->mb_width = src->mb_width;
87  dst->mb_height = src->mb_height;
88  dst->mb_stride = src->mb_stride;
89  dst->needs_fg = src->needs_fg;
90 }
91 
93 {
94  int ret, i;
95 
96  av_assert0(!dst->f->buf[0]);
97  av_assert0(src->f->buf[0]);
98  av_assert0(src->tf.f == src->f);
99 
100  dst->tf.f = dst->f;
101  ret = ff_thread_ref_frame(&dst->tf, &src->tf);
102  if (ret < 0)
103  goto fail;
104 
105  if (src->needs_fg) {
106  ret = av_frame_ref(dst->f_grain, src->f_grain);
107  if (ret < 0)
108  goto fail;
109  }
110 
111  dst->qscale_table_buf = av_buffer_ref(src->qscale_table_buf);
112  dst->mb_type_buf = av_buffer_ref(src->mb_type_buf);
113  dst->pps_buf = av_buffer_ref(src->pps_buf);
114  if (!dst->qscale_table_buf || !dst->mb_type_buf || !dst->pps_buf) {
115  ret = AVERROR(ENOMEM);
116  goto fail;
117  }
118 
119  for (i = 0; i < 2; i++) {
120  dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
121  dst->ref_index_buf[i] = av_buffer_ref(src->ref_index_buf[i]);
122  if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i]) {
123  ret = AVERROR(ENOMEM);
124  goto fail;
125  }
126  }
127 
128  if (src->hwaccel_picture_private) {
129  dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
130  if (!dst->hwaccel_priv_buf) {
131  ret = AVERROR(ENOMEM);
132  goto fail;
133  }
135  }
136 
138 
139  return 0;
140 fail:
141  ff_h264_unref_picture(h, dst);
142  return ret;
143 }
144 
146 {
147  int ret, i;
148 
149  if (!src->f || !src->f->buf[0]) {
150  ff_h264_unref_picture(h, dst);
151  return 0;
152  }
153 
154  av_assert0(src->tf.f == src->f);
155 
156  dst->tf.f = dst->f;
157  ff_thread_release_ext_buffer(h->avctx, &dst->tf);
158  ret = ff_thread_ref_frame(&dst->tf, &src->tf);
159  if (ret < 0)
160  goto fail;
161 
162  if (src->needs_fg) {
163  ff_thread_release_buffer(h->avctx, dst->f_grain);
164  ret = av_frame_ref(dst->f_grain, src->f_grain);
165  if (ret < 0)
166  goto fail;
167  }
168 
169  ret = av_buffer_replace(&dst->qscale_table_buf, src->qscale_table_buf);
170  ret |= av_buffer_replace(&dst->mb_type_buf, src->mb_type_buf);
171  ret |= av_buffer_replace(&dst->pps_buf, src->pps_buf);
172  if (ret < 0)
173  goto fail;
174 
175  for (i = 0; i < 2; i++) {
176  ret = av_buffer_replace(&dst->motion_val_buf[i], src->motion_val_buf[i]);
177  ret |= av_buffer_replace(&dst->ref_index_buf[i], src->ref_index_buf[i]);
178  if (ret < 0)
179  goto fail;
180  }
181 
182  ret = av_buffer_replace(&dst->hwaccel_priv_buf, src->hwaccel_priv_buf);
183  if (ret < 0)
184  goto fail;
185 
186  dst->hwaccel_picture_private = src->hwaccel_picture_private;
187 
189 
190  return 0;
191 fail:
192  ff_h264_unref_picture(h, dst);
193  return ret;
194 }
195 
197 {
198 #if CONFIG_ERROR_RESILIENCE
199  int i;
200 
201  memset(dst, 0, sizeof(*dst));
202 
203  if (!src)
204  return;
205 
206  dst->f = src->f;
207  dst->tf = &src->tf;
208 
209  for (i = 0; i < 2; i++) {
210  dst->motion_val[i] = src->motion_val[i];
211  dst->ref_index[i] = src->ref_index[i];
212  }
213 
214  dst->mb_type = src->mb_type;
215  dst->field_picture = src->field_picture;
216 #endif /* CONFIG_ERROR_RESILIENCE */
217 }
218 
220 {
221  AVCodecContext *const avctx = h->avctx;
222  H264Picture *cur = h->cur_pic_ptr;
223  int err = 0;
224  h->mb_y = 0;
225 
226  if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
227  if (!h->droppable) {
229  h->poc.prev_poc_msb = h->poc.poc_msb;
230  h->poc.prev_poc_lsb = h->poc.poc_lsb;
231  }
232  h->poc.prev_frame_num_offset = h->poc.frame_num_offset;
233  h->poc.prev_frame_num = h->poc.frame_num;
234  }
235 
236  if (avctx->hwaccel) {
237  err = avctx->hwaccel->end_frame(avctx);
238  if (err < 0)
239  av_log(avctx, AV_LOG_ERROR,
240  "hardware accelerator failed to decode picture\n");
241  } else if (!in_setup && cur->needs_fg && (!FIELD_PICTURE(h) || !h->first_field)) {
243 
244  err = AVERROR_INVALIDDATA;
245  if (sd) // a decoding error may have happened before the side data could be allocated
246  err = ff_h274_apply_film_grain(cur->f_grain, cur->f, &h->h274db,
247  (AVFilmGrainParams *) sd->data);
248  if (err < 0) {
249  av_log(h->avctx, AV_LOG_WARNING, "Failed synthesizing film "
250  "grain, ignoring: %s\n", av_err2str(err));
251  cur->needs_fg = 0;
252  err = 0;
253  }
254  }
255 
256  if (!in_setup && !h->droppable)
257  ff_thread_report_progress(&cur->tf, INT_MAX,
258  h->picture_structure == PICT_BOTTOM_FIELD);
259  emms_c();
260 
261  h->current_slice = 0;
262 
263  return err;
264 }
AVCodecContext::hwaccel
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:1379
ff_h264_unref_picture
void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
Definition: h264_picture.c:36
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
ERPicture::tf
ThreadFrame * tf
Definition: error_resilience.h:43
H264Picture::poc
int poc
frame POC
Definition: h264dec.h:129
ff_thread_release_ext_buffer
void ff_thread_release_ext_buffer(AVCodecContext *avctx, ThreadFrame *f)
Unref a ThreadFrame.
Definition: pthread_frame.c:1148
H264Picture::f
AVFrame * f
Definition: h264dec.h:108
av_frame_get_side_data
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:684
ff_h264_replace_picture
int ff_h264_replace_picture(H264Context *h, H264Picture *dst, const H264Picture *src)
Definition: h264_picture.c:145
AVBufferRef::data
uint8_t * data
The data buffer.
Definition: buffer.h:90
H264Picture::ref_count
int ref_count[2][2]
number of entries in ref_poc (FIXME need per slice)
Definition: h264dec.h:137
H264Picture::ref_index
int8_t * ref_index[2]
Definition: h264dec.h:126
ff_h264_set_erpic
void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
Definition: h264_picture.c:196
ERPicture::ref_index
int8_t * ref_index[2]
Definition: error_resilience.h:47
AV_FRAME_DATA_FILM_GRAIN_PARAMS
@ AV_FRAME_DATA_FILM_GRAIN_PARAMS
Film grain parameters for a frame, described by AVFilmGrainParams.
Definition: frame.h:184
H264Picture::pps
const PPS * pps
Definition: h264dec.h:153
H264Picture::qscale_table
int8_t * qscale_table
Definition: h264dec.h:114
PICT_BOTTOM_FIELD
#define PICT_BOTTOM_FIELD
Definition: mpegutils.h:37
H264Picture::ref_index_buf
AVBufferRef * ref_index_buf[2]
Definition: h264dec.h:125
av_buffer_ref
AVBufferRef * av_buffer_ref(const AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:103
mpegutils.h
AVFrame::buf
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:525
H264Picture::invalid_gap
int invalid_gap
Definition: h264dec.h:148
H264Picture::pps_buf
AVBufferRef * pps_buf
Definition: h264dec.h:152
thread.h
ThreadFrame::f
AVFrame * f
Definition: threadframe.h:28
ERPicture
Definition: error_resilience.h:41
H264Picture::frame_num
int frame_num
frame_num (raw frame_num from slice header)
Definition: h264dec.h:130
H264SliceContext
Definition: h264dec.h:170
H264Picture::mmco_reset
int mmco_reset
MMCO_RESET set this 1.
Definition: h264dec.h:131
fail
#define fail()
Definition: checkasm.h:130
H264Picture::ref_poc
int ref_poc[2][2][32]
POCs of the frames/fields used as reference (FIXME need per slice)
Definition: h264dec.h:136
ERPicture::motion_val
int16_t(*[2] motion_val)[2]
Definition: error_resilience.h:46
H264Picture::mb_stride
int mb_stride
Definition: h264dec.h:156
H264Picture::f_grain
AVFrame * f_grain
Definition: h264dec.h:111
avassert.h
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
ff_thread_report_progress
void ff_thread_report_progress(ThreadFrame *f, int n, int field)
Notify later decoding threads when part of their reference picture is ready.
Definition: pthread_frame.c:595
H264Picture::mbaff
int mbaff
1 -> MBAFF frame 0-> not MBAFF
Definition: h264dec.h:138
ERPicture::field_picture
int field_picture
Definition: error_resilience.h:50
FIELD_PICTURE
#define FIELD_PICTURE(h)
Definition: h264dec.h:68
ff_h264_execute_ref_pic_marking
int ff_h264_execute_ref_pic_marking(H264Context *h)
Execute the reference picture marking (memory management control operations).
Definition: h264_refs.c:609
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
ERPicture::f
AVFrame * f
Definition: error_resilience.h:42
H264Picture::sei_recovery_frame_cnt
int sei_recovery_frame_cnt
Definition: h264dec.h:149
ERPicture::mb_type
uint32_t * mb_type
Definition: error_resilience.h:49
ff_thread_ref_frame
int ff_thread_ref_frame(ThreadFrame *dst, const ThreadFrame *src)
Definition: utils.c:889
threadframe.h
H264Picture::motion_val_buf
AVBufferRef * motion_val_buf[2]
Definition: h264dec.h:116
av_buffer_unref
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:139
AVHWAccel::end_frame
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:2168
H264Picture::mb_height
int mb_height
Definition: h264dec.h:155
H264Picture::reference
int reference
Definition: h264dec.h:146
av_frame_ref
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:343
av_err2str
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:121
H264Picture::tf
ThreadFrame tf
Definition: h264dec.h:109
H264Picture::mb_type
uint32_t * mb_type
Definition: h264dec.h:120
H264Picture::recovered
int recovered
picture at IDR or recovery point + recovery count
Definition: h264dec.h:147
AVFrameSideData::data
uint8_t * data
Definition: frame.h:233
AVFilmGrainParams
This structure describes how to handle film grain synthesis in video for specific codecs.
Definition: film_grain_params.h:216
FF_THREAD_FRAME
#define FF_THREAD_FRAME
Decode more than one frame at once.
Definition: avcodec.h:1474
ff_thread_release_buffer
void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
Wrapper around release_buffer() frame-for multithreaded codecs.
Definition: pthread_frame.c:1081
H264Picture::field_picture
int field_picture
whether or not picture was encoded in separate fields
Definition: h264dec.h:139
h264dec.h
ff_h274_apply_film_grain
int ff_h274_apply_film_grain(AVFrame *out_frame, const AVFrame *in_frame, H274FilmGrainDatabase *database, const AVFilmGrainParams *params)
Definition: h274.c:217
H264Picture::needs_fg
int needs_fg
whether picture needs film grain synthesis (see f_grain)
Definition: h264dec.h:150
H264Context
H264Context.
Definition: h264dec.h:330
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
H264Picture::hwaccel_priv_buf
AVBufferRef * hwaccel_priv_buf
Definition: h264dec.h:122
h264_copy_picture_params
static void h264_copy_picture_params(H264Picture *dst, const H264Picture *src)
Definition: h264_picture.c:59
av_buffer_replace
int av_buffer_replace(AVBufferRef **pdst, const AVBufferRef *src)
Ensure dst refers to the same data as src.
Definition: buffer.c:233
avcodec.h
ff_h264_ref_picture
int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
Definition: h264_picture.c:92
ret
ret
Definition: filter_design.txt:187
AVCodecContext
main external API structure.
Definition: avcodec.h:389
AVCodecContext::active_thread_type
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:1482
H264Picture::field_poc
int field_poc[2]
top/bottom POC
Definition: h264dec.h:128
error_resilience.h
H264Picture::mb_width
int mb_width
Definition: h264dec.h:155
H264Picture
Definition: h264dec.h:107
ff_h264_field_end
int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
Definition: h264_picture.c:219
H264Picture::mb_type_buf
AVBufferRef * mb_type_buf
Definition: h264dec.h:119
AVFrameSideData
Structure to hold side data for an AVFrame.
Definition: frame.h:231
H264Picture::hwaccel_picture_private
void * hwaccel_picture_private
hardware accelerator private data
Definition: h264dec.h:123
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
h
h
Definition: vp9dsp_template.c:2038
H264Picture::qscale_table_buf
AVBufferRef * qscale_table_buf
Definition: h264dec.h:113
H264Picture::long_ref
int long_ref
1->long term reference 0->short term reference
Definition: h264dec.h:135
H264Picture::motion_val
int16_t(*[2] motion_val)[2]
Definition: h264dec.h:117