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 "internal.h"
31 #include "cabac.h"
32 #include "cabac_functions.h"
33 #include "error_resilience.h"
34 #include "avcodec.h"
35 #include "h264dec.h"
36 #include "h264data.h"
37 #include "h264chroma.h"
38 #include "h264_mvpred.h"
39 #include "mathops.h"
40 #include "mpegutils.h"
41 #include "rectangle.h"
42 #include "thread.h"
43
ff_h264_unref_picture(H264Context * h,H264Picture * pic)44 void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
45 {
46 int off = offsetof(H264Picture, tf) + sizeof(pic->tf);
47 int i;
48
49 if (!pic->f || !pic->f->buf[0])
50 return;
51
52 ff_thread_release_buffer(h->avctx, &pic->tf);
53 av_buffer_unref(&pic->hwaccel_priv_buf);
54
55 av_buffer_unref(&pic->qscale_table_buf);
56 av_buffer_unref(&pic->mb_type_buf);
57 av_buffer_unref(&pic->pps_buf);
58 for (i = 0; i < 2; i++) {
59 av_buffer_unref(&pic->motion_val_buf[i]);
60 av_buffer_unref(&pic->ref_index_buf[i]);
61 }
62
63 memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
64 }
65
ff_h264_ref_picture(H264Context * h,H264Picture * dst,H264Picture * src)66 int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
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
79 dst->qscale_table_buf = av_buffer_ref(src->qscale_table_buf);
80 dst->mb_type_buf = av_buffer_ref(src->mb_type_buf);
81 dst->pps_buf = av_buffer_ref(src->pps_buf);
82 if (!dst->qscale_table_buf || !dst->mb_type_buf || !dst->pps_buf) {
83 ret = AVERROR(ENOMEM);
84 goto fail;
85 }
86 dst->qscale_table = src->qscale_table;
87 dst->mb_type = src->mb_type;
88 dst->pps = src->pps;
89
90 for (i = 0; i < 2; i++) {
91 dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
92 dst->ref_index_buf[i] = av_buffer_ref(src->ref_index_buf[i]);
93 if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i]) {
94 ret = AVERROR(ENOMEM);
95 goto fail;
96 }
97 dst->motion_val[i] = src->motion_val[i];
98 dst->ref_index[i] = src->ref_index[i];
99 }
100
101 if (src->hwaccel_picture_private) {
102 dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
103 if (!dst->hwaccel_priv_buf) {
104 ret = AVERROR(ENOMEM);
105 goto fail;
106 }
107 dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
108 }
109
110 for (i = 0; i < 2; i++)
111 dst->field_poc[i] = src->field_poc[i];
112
113 memcpy(dst->ref_poc, src->ref_poc, sizeof(src->ref_poc));
114 memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
115
116 dst->poc = src->poc;
117 dst->frame_num = src->frame_num;
118 dst->mmco_reset = src->mmco_reset;
119 dst->long_ref = src->long_ref;
120 dst->mbaff = src->mbaff;
121 dst->field_picture = src->field_picture;
122 dst->reference = src->reference;
123 dst->recovered = src->recovered;
124 dst->invalid_gap = src->invalid_gap;
125 dst->sei_recovery_frame_cnt = src->sei_recovery_frame_cnt;
126 dst->mb_width = src->mb_width;
127 dst->mb_height = src->mb_height;
128 dst->mb_stride = src->mb_stride;
129
130 return 0;
131 fail:
132 ff_h264_unref_picture(h, dst);
133 return ret;
134 }
135
ff_h264_set_erpic(ERPicture * dst,H264Picture * src)136 void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
137 {
138 #if CONFIG_ERROR_RESILIENCE
139 int i;
140
141 memset(dst, 0, sizeof(*dst));
142
143 if (!src)
144 return;
145
146 dst->f = src->f;
147 dst->tf = &src->tf;
148
149 for (i = 0; i < 2; i++) {
150 dst->motion_val[i] = src->motion_val[i];
151 dst->ref_index[i] = src->ref_index[i];
152 }
153
154 dst->mb_type = src->mb_type;
155 dst->field_picture = src->field_picture;
156 #endif /* CONFIG_ERROR_RESILIENCE */
157 }
158
ff_h264_field_end(H264Context * h,H264SliceContext * sl,int in_setup)159 int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
160 {
161 AVCodecContext *const avctx = h->avctx;
162 int err = 0;
163 h->mb_y = 0;
164
165 if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
166 if (!h->droppable) {
167 err = ff_h264_execute_ref_pic_marking(h);
168 h->poc.prev_poc_msb = h->poc.poc_msb;
169 h->poc.prev_poc_lsb = h->poc.poc_lsb;
170 }
171 h->poc.prev_frame_num_offset = h->poc.frame_num_offset;
172 h->poc.prev_frame_num = h->poc.frame_num;
173 }
174
175 if (avctx->hwaccel) {
176 err = avctx->hwaccel->end_frame(avctx);
177 if (err < 0)
178 av_log(avctx, AV_LOG_ERROR,
179 "hardware accelerator failed to decode picture\n");
180 }
181
182 if (!in_setup && !h->droppable)
183 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
184 h->picture_structure == PICT_BOTTOM_FIELD);
185 emms_c();
186
187 h->current_slice = 0;
188
189 return err;
190 }
191