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
36void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
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);
46    av_buffer_unref(&pic->hwaccel_priv_buf);
47
48    av_buffer_unref(&pic->qscale_table_buf);
49    av_buffer_unref(&pic->mb_type_buf);
50    av_buffer_unref(&pic->pps_buf);
51    for (i = 0; i < 2; i++) {
52        av_buffer_unref(&pic->motion_val_buf[i]);
53        av_buffer_unref(&pic->ref_index_buf[i]);
54    }
55
56    memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
57}
58
59static void h264_copy_picture_params(H264Picture *dst, const H264Picture *src)
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
92int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
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        }
134        dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
135    }
136
137    h264_copy_picture_params(dst, src);
138
139    return 0;
140fail:
141    ff_h264_unref_picture(h, dst);
142    return ret;
143}
144
145int ff_h264_replace_picture(H264Context *h, H264Picture *dst, const H264Picture *src)
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
188    h264_copy_picture_params(dst, src);
189
190    return 0;
191fail:
192    ff_h264_unref_picture(h, dst);
193    return ret;
194}
195
196void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
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
219int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
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) {
228            err = ff_h264_execute_ref_pic_marking(h);
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)) {
242        AVFrameSideData *sd = av_frame_get_side_data(cur->f, AV_FRAME_DATA_FILM_GRAIN_PARAMS);
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}
265