FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/wmv2enc.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 110 116 94.8%
Branches: 34 48 70.8%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2002 The FFmpeg Project
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "avcodec.h"
22 #include "h263.h"
23 #include "mpegvideo.h"
24 #include "msmpeg4.h"
25 #include "msmpeg4data.h"
26 #include "wmv2.h"
27
28
29 4 static int encode_ext_header(Wmv2Context *w)
30 {
31 4 MpegEncContext *const s = &w->s;
32 PutBitContext pb;
33 int code;
34
35 4 init_put_bits(&pb, s->avctx->extradata, s->avctx->extradata_size);
36
37 4 put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); // yes 29.97 -> 29
38
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4 put_bits(&pb, 11, FFMIN(s->bit_rate / 1024, 2047));
39
40 4 put_bits(&pb, 1, w->mspel_bit = 1);
41 4 put_bits(&pb, 1, s->loop_filter);
42 4 put_bits(&pb, 1, w->abt_flag = 1);
43 4 put_bits(&pb, 1, w->j_type_bit = 1);
44 4 put_bits(&pb, 1, w->top_left_mv_flag = 0);
45 4 put_bits(&pb, 1, w->per_mb_rl_bit = 1);
46 4 put_bits(&pb, 3, code = 1);
47
48 4 flush_put_bits(&pb);
49
50 4 s->slice_height = s->mb_height / code;
51
52 4 return 0;
53 }
54
55 4 static av_cold int wmv2_encode_init(AVCodecContext *avctx)
56 {
57 4 Wmv2Context *const w = avctx->priv_data;
58
59
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4 if (ff_mpv_encode_init(avctx) < 0)
60 return -1;
61
62 4 ff_wmv2_common_init(w);
63
64 4 avctx->extradata_size = 4;
65 4 avctx->extradata = av_mallocz(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
66
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4 if (!avctx->extradata)
67 return AVERROR(ENOMEM);
68
69 4 encode_ext_header(w);
70
71 4 return 0;
72 }
73
74 200 int ff_wmv2_encode_picture_header(MpegEncContext *s, int picture_number)
75 {
76 200 Wmv2Context *const w = (Wmv2Context *) s;
77
78 200 put_bits(&s->pb, 1, s->pict_type - 1);
79
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200 if (s->pict_type == AV_PICTURE_TYPE_I)
80 20 put_bits(&s->pb, 7, 0);
81 200 put_bits(&s->pb, 5, s->qscale);
82
83 200 s->dc_table_index = 1;
84 200 s->mv_table_index = 1; /* only if P-frame */
85 200 s->per_mb_rl_table = 0;
86 200 s->mspel = 0;
87 200 w->per_mb_abt = 0;
88 200 w->abt_type = 0;
89 200 w->j_type = 0;
90
91
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200 av_assert0(s->flipflop_rounding);
92
93
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200 if (s->pict_type == AV_PICTURE_TYPE_I) {
94
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20 av_assert0(s->no_rounding == 1);
95
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20 if (w->j_type_bit)
96 20 put_bits(&s->pb, 1, w->j_type);
97
98
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20 if (w->per_mb_rl_bit)
99 20 put_bits(&s->pb, 1, s->per_mb_rl_table);
100
101
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20 if (!s->per_mb_rl_table) {
102 20 ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
103 20 ff_msmpeg4_code012(&s->pb, s->rl_table_index);
104 }
105
106 20 put_bits(&s->pb, 1, s->dc_table_index);
107
108 20 s->inter_intra_pred = 0;
109 } else {
110 int cbp_index;
111
112 180 put_bits(&s->pb, 2, SKIP_TYPE_NONE);
113
114 180 ff_msmpeg4_code012(&s->pb, cbp_index = 0);
115 180 w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
116
117
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180 if (w->mspel_bit)
118 180 put_bits(&s->pb, 1, s->mspel);
119
120
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180 if (w->abt_flag) {
121 180 put_bits(&s->pb, 1, w->per_mb_abt ^ 1);
122
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180 if (!w->per_mb_abt)
123 180 ff_msmpeg4_code012(&s->pb, w->abt_type);
124 }
125
126
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180 if (w->per_mb_rl_bit)
127 180 put_bits(&s->pb, 1, s->per_mb_rl_table);
128
129
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180 if (!s->per_mb_rl_table) {
130 180 ff_msmpeg4_code012(&s->pb, s->rl_table_index);
131 180 s->rl_chroma_table_index = s->rl_table_index;
132 }
133 180 put_bits(&s->pb, 1, s->dc_table_index);
134 180 put_bits(&s->pb, 1, s->mv_table_index);
135
136 180 s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
137 }
138 200 s->esc3_level_length = 0;
139 200 s->esc3_run_length = 0;
140
141 200 return 0;
142 }
143
144 /* Nearly identical to wmv1 but that is just because we do not use the
145 * useless M$ crap features. It is duplicated here in case someone wants
146 * to add support for these crap features. */
147 59850 void ff_wmv2_encode_mb(MpegEncContext *s, int16_t block[6][64],
148 int motion_x, int motion_y)
149 {
150 59850 Wmv2Context *const w = (Wmv2Context *) s;
151 int cbp, coded_cbp, i;
152 int pred_x, pred_y;
153 uint8_t *coded_block;
154
155 59850 ff_msmpeg4_handle_slices(s);
156
157
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59850 if (!s->mb_intra) {
158 /* compute cbp */
159 51711 cbp = 0;
160
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361977 for (i = 0; i < 6; i++)
161
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310266 if (s->block_last_index[i] >= 0)
162 109321 cbp |= 1 << (5 - i);
163
164 51711 put_bits(&s->pb,
165 51711 ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
166 51711 ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
167
168 51711 s->misc_bits += get_bits_diff(s);
169 /* motion vector */
170 51711 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
171 51711 ff_msmpeg4_encode_motion(s, motion_x - pred_x,
172 motion_y - pred_y);
173 51711 s->mv_bits += get_bits_diff(s);
174 } else {
175 /* compute cbp */
176 8139 cbp = 0;
177 8139 coded_cbp = 0;
178
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56973 for (i = 0; i < 6; i++) {
179 int val, pred;
180 48834 val = (s->block_last_index[i] >= 1);
181 48834 cbp |= val << (5 - i);
182
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48834 if (i < 4) {
183 /* predict value for close blocks only for luma */
184 32556 pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
185 32556 *coded_block = val;
186 32556 val = val ^ pred;
187 }
188 48834 coded_cbp |= val << (5 - i);
189 }
190
191
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8139 if (s->pict_type == AV_PICTURE_TYPE_I)
192 5985 put_bits(&s->pb,
193 5985 ff_msmp4_mb_i_table[coded_cbp][1],
194 5985 ff_msmp4_mb_i_table[coded_cbp][0]);
195 else
196 2154 put_bits(&s->pb,
197 2154 ff_wmv2_inter_table[w->cbp_table_index][cbp][1],
198 2154 ff_wmv2_inter_table[w->cbp_table_index][cbp][0]);
199 8139 put_bits(&s->pb, 1, 0); /* no AC prediction yet */
200
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8139 if (s->inter_intra_pred) {
201 s->h263_aic_dir = 0;
202 put_bits(&s->pb,
203 ff_table_inter_intra[s->h263_aic_dir][1],
204 ff_table_inter_intra[s->h263_aic_dir][0]);
205 }
206 8139 s->misc_bits += get_bits_diff(s);
207 }
208
209
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418950 for (i = 0; i < 6; i++)
210 359100 ff_msmpeg4_encode_block(s, block[i], i);
211
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59850 if (s->mb_intra)
212 8139 s->i_tex_bits += get_bits_diff(s);
213 else
214 51711 s->p_tex_bits += get_bits_diff(s);
215 59850 }
216
217 const AVCodec ff_wmv2_encoder = {
218 .name = "wmv2",
219 .long_name = NULL_IF_CONFIG_SMALL("Windows Media Video 8"),
220 .type = AVMEDIA_TYPE_VIDEO,
221 .id = AV_CODEC_ID_WMV2,
222 .priv_class = &ff_mpv_enc_class,
223 .priv_data_size = sizeof(Wmv2Context),
224 .init = wmv2_encode_init,
225 .encode2 = ff_mpv_encode_picture,
226 .close = ff_mpv_encode_end,
227 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
228 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
229 AV_PIX_FMT_NONE },
230 };
231