avcodec/dca: avoid using bitstream reader in a non-standard way
[ffmpeg.git] / 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/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 #include "vdpau_compat.h"
45
46 void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
47 {
48     int off = offsetof(H264Picture, tf) + sizeof(pic->tf);
49     int i;
50
51     if (!pic->f || !pic->f->buf[0])
52         return;
53
54     ff_thread_release_buffer(h->avctx, &pic->tf);
55     av_buffer_unref(&pic->hwaccel_priv_buf);
56
57     av_buffer_unref(&pic->qscale_table_buf);
58     av_buffer_unref(&pic->mb_type_buf);
59     for (i = 0; i < 2; i++) {
60         av_buffer_unref(&pic->motion_val_buf[i]);
61         av_buffer_unref(&pic->ref_index_buf[i]);
62     }
63
64     memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
65 }
66
67 int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
68 {
69     int ret, i;
70
71     av_assert0(!dst->f->buf[0]);
72     av_assert0(src->f->buf[0]);
73     av_assert0(src->tf.f == src->f);
74
75     dst->tf.f = dst->f;
76     ret = ff_thread_ref_frame(&dst->tf, &src->tf);
77     if (ret < 0)
78         goto fail;
79
80     dst->qscale_table_buf = av_buffer_ref(src->qscale_table_buf);
81     dst->mb_type_buf      = av_buffer_ref(src->mb_type_buf);
82     if (!dst->qscale_table_buf || !dst->mb_type_buf)
83         goto fail;
84     dst->qscale_table = src->qscale_table;
85     dst->mb_type      = src->mb_type;
86
87     for (i = 0; i < 2; i++) {
88         dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
89         dst->ref_index_buf[i]  = av_buffer_ref(src->ref_index_buf[i]);
90         if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i])
91             goto fail;
92         dst->motion_val[i] = src->motion_val[i];
93         dst->ref_index[i]  = src->ref_index[i];
94     }
95
96     if (src->hwaccel_picture_private) {
97         dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
98         if (!dst->hwaccel_priv_buf)
99             goto fail;
100         dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
101     }
102
103     for (i = 0; i < 2; i++)
104         dst->field_poc[i] = src->field_poc[i];
105
106     memcpy(dst->ref_poc,   src->ref_poc,   sizeof(src->ref_poc));
107     memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
108
109     dst->poc           = src->poc;
110     dst->frame_num     = src->frame_num;
111     dst->mmco_reset    = src->mmco_reset;
112     dst->long_ref      = src->long_ref;
113     dst->mbaff         = src->mbaff;
114     dst->field_picture = src->field_picture;
115     dst->reference     = src->reference;
116     dst->recovered     = src->recovered;
117     dst->invalid_gap   = src->invalid_gap;
118     dst->sei_recovery_frame_cnt = src->sei_recovery_frame_cnt;
119
120     return 0;
121 fail:
122     ff_h264_unref_picture(h, dst);
123     return ret;
124 }
125
126 void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
127 {
128 #if CONFIG_ERROR_RESILIENCE
129     int i;
130
131     memset(dst, 0, sizeof(*dst));
132
133     if (!src)
134         return;
135
136     dst->f = src->f;
137     dst->tf = &src->tf;
138
139     for (i = 0; i < 2; i++) {
140         dst->motion_val[i] = src->motion_val[i];
141         dst->ref_index[i] = src->ref_index[i];
142     }
143
144     dst->mb_type = src->mb_type;
145     dst->field_picture = src->field_picture;
146 #endif /* CONFIG_ERROR_RESILIENCE */
147 }
148
149 int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
150 {
151     AVCodecContext *const avctx = h->avctx;
152     int err = 0;
153     h->mb_y = 0;
154
155 #if FF_API_CAP_VDPAU
156     if (CONFIG_H264_VDPAU_DECODER &&
157         h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU)
158         ff_vdpau_h264_set_reference_frames(h);
159 #endif
160
161     if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
162         if (!h->droppable) {
163             err = ff_h264_execute_ref_pic_marking(h);
164             h->poc.prev_poc_msb = h->poc.poc_msb;
165             h->poc.prev_poc_lsb = h->poc.poc_lsb;
166         }
167         h->poc.prev_frame_num_offset = h->poc.frame_num_offset;
168         h->poc.prev_frame_num        = h->poc.frame_num;
169     }
170
171     if (avctx->hwaccel) {
172         err = avctx->hwaccel->end_frame(avctx);
173         if (err < 0)
174             av_log(avctx, AV_LOG_ERROR,
175                    "hardware accelerator failed to decode picture\n");
176     }
177
178 #if FF_API_CAP_VDPAU
179     if (CONFIG_H264_VDPAU_DECODER &&
180         h->avctx->codec->capabilities & AV_CODEC_CAP_HWACCEL_VDPAU)
181         ff_vdpau_h264_picture_complete(h);
182 #endif
183
184     if (!in_setup && !h->droppable)
185         ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
186                                   h->picture_structure == PICT_BOTTOM_FIELD);
187     emms_c();
188
189     h->current_slice = 0;
190
191     return err;
192 }