2 * H.26L/H.264/AVC/JVT/14496-10/... decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * H.264 / AVC / MPEG-4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
28 #include "libavutil/avassert.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/timer.h"
33 #include "cabac_functions.h"
34 #include "error_resilience.h"
38 #include "h264chroma.h"
39 #include "h264_mvpred.h"
41 #include "mpegutils.h"
42 #include "rectangle.h"
45 void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
47 int off = offsetof(H264Picture, tf) + sizeof(pic->tf);
50 if (!pic->f || !pic->f->buf[0])
53 ff_thread_release_buffer(h->avctx, &pic->tf);
54 av_buffer_unref(&pic->hwaccel_priv_buf);
56 av_buffer_unref(&pic->qscale_table_buf);
57 av_buffer_unref(&pic->mb_type_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]);
63 memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
66 int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
70 av_assert0(!dst->f->buf[0]);
71 av_assert0(src->f->buf[0]);
75 ret = ff_thread_ref_frame(&dst->tf, &src->tf);
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 if (!dst->qscale_table_buf || !dst->mb_type_buf)
83 dst->qscale_table = src->qscale_table;
84 dst->mb_type = src->mb_type;
86 for (i = 0; i < 2; i++) {
87 dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
88 dst->ref_index_buf[i] = av_buffer_ref(src->ref_index_buf[i]);
89 if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i])
91 dst->motion_val[i] = src->motion_val[i];
92 dst->ref_index[i] = src->ref_index[i];
95 if (src->hwaccel_picture_private) {
96 dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
97 if (!dst->hwaccel_priv_buf)
99 dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
102 for (i = 0; i < 2; i++)
103 dst->field_poc[i] = src->field_poc[i];
105 memcpy(dst->ref_poc, src->ref_poc, sizeof(src->ref_poc));
106 memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
109 dst->frame_num = src->frame_num;
110 dst->mmco_reset = src->mmco_reset;
111 dst->pic_id = src->pic_id;
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;
120 ff_h264_unref_picture(h, dst);
124 #if CONFIG_ERROR_RESILIENCE
125 static void h264_set_erpic(ERPicture *dst, H264Picture *src)
135 for (i = 0; i < 2; i++) {
136 dst->motion_val[i] = src->motion_val[i];
137 dst->ref_index[i] = src->ref_index[i];
140 dst->mb_type = src->mb_type;
141 dst->field_picture = src->field_picture;
143 #endif /* CONFIG_ERROR_RESILIENCE */
145 int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
147 AVCodecContext *const avctx = h->avctx;
151 if (!in_setup && !h->droppable)
152 ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
153 h->picture_structure == PICT_BOTTOM_FIELD);
155 if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
157 err = ff_h264_execute_ref_pic_marking(h);
158 h->poc.prev_poc_msb = h->poc.poc_msb;
159 h->poc.prev_poc_lsb = h->poc.poc_lsb;
161 h->poc.prev_frame_num_offset = h->poc.frame_num_offset;
162 h->poc.prev_frame_num = h->poc.frame_num;
165 if (avctx->hwaccel) {
166 if (avctx->hwaccel->end_frame(avctx) < 0)
167 av_log(avctx, AV_LOG_ERROR,
168 "hardware accelerator failed to decode picture\n");
171 #if CONFIG_ERROR_RESILIENCE
173 * FIXME: Error handling code does not seem to support interlaced
174 * when slices span multiple rows
175 * The ff_er_add_slice calls don't work right for bottom
176 * fields; they cause massive erroneous error concealing
177 * Error marking covers both fields (top and bottom).
178 * This causes a mismatched s->error_count
179 * and a bad error table. Further, the error count goes to
180 * INT_MAX when called for bottom field, because mb_y is
181 * past end by one (callers fault) and resync_mb_y != 0
182 * causes problems for the first MB line, too.
184 if (!FIELD_PICTURE(h) && h->enable_er) {
185 h264_set_erpic(&sl->er.cur_pic, h->cur_pic_ptr);
186 h264_set_erpic(&sl->er.last_pic,
187 sl->ref_count[0] ? sl->ref_list[0][0].parent : NULL);
188 h264_set_erpic(&sl->er.next_pic,
189 sl->ref_count[1] ? sl->ref_list[1][0].parent : NULL);
190 ff_er_frame_end(&sl->er);
192 #endif /* CONFIG_ERROR_RESILIENCE */
196 h->current_slice = 0;
197 h->field_started = 0;