FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/wmv2enc.c
Date: 2024-04-12 08:31:17
Exec Total Coverage
Lines: 112 118 94.9%
Functions: 4 4 100.0%
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 "libavutil/mem.h"
22 #include "avcodec.h"
23 #include "codec_internal.h"
24 #include "h263.h"
25 #include "mpegvideo.h"
26 #include "mpegvideoenc.h"
27 #include "msmpeg4.h"
28 #include "msmpeg4enc.h"
29 #include "msmpeg4data.h"
30 #include "msmpeg4_vc1_data.h"
31 #include "wmv2.h"
32 #include "wmv2enc.h"
33
34 #define WMV2_EXTRADATA_SIZE 4
35
36 typedef struct WMV2EncContext {
37 MSMPEG4EncContext msmpeg4;
38 WMV2Context common;
39 int j_type_bit;
40 int j_type;
41 int abt_flag;
42 int abt_type;
43 int per_mb_abt;
44 int mspel_bit;
45 int cbp_table_index;
46 int top_left_mv_flag;
47 int per_mb_rl_bit;
48 } WMV2EncContext;
49
50 4 static int encode_ext_header(WMV2EncContext *w)
51 {
52 4 MpegEncContext *const s = &w->msmpeg4.s;
53 PutBitContext pb;
54 int code;
55
56 4 init_put_bits(&pb, s->avctx->extradata, WMV2_EXTRADATA_SIZE);
57
58 4 put_bits(&pb, 5, s->avctx->time_base.den / s->avctx->time_base.num); // yes 29.97 -> 29
59
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4 put_bits(&pb, 11, FFMIN(s->bit_rate / 1024, 2047));
60
61 4 put_bits(&pb, 1, w->mspel_bit = 1);
62 4 put_bits(&pb, 1, s->loop_filter);
63 4 put_bits(&pb, 1, w->abt_flag = 1);
64 4 put_bits(&pb, 1, w->j_type_bit = 1);
65 4 put_bits(&pb, 1, w->top_left_mv_flag = 0);
66 4 put_bits(&pb, 1, w->per_mb_rl_bit = 1);
67 4 put_bits(&pb, 3, code = 1);
68
69 4 flush_put_bits(&pb);
70
71 4 s->slice_height = s->mb_height / code;
72
73 4 return 0;
74 }
75
76 4 static av_cold int wmv2_encode_init(AVCodecContext *avctx)
77 {
78 4 WMV2EncContext *const w = avctx->priv_data;
79 4 MpegEncContext *const s = &w->msmpeg4.s;
80
81 4 s->private_ctx = &w->common;
82
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4 if (ff_mpv_encode_init(avctx) < 0)
83 return -1;
84
85 4 ff_wmv2_common_init(s);
86
87 4 avctx->extradata_size = WMV2_EXTRADATA_SIZE;
88 4 avctx->extradata = av_mallocz(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
89
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4 if (!avctx->extradata)
90 return AVERROR(ENOMEM);
91
92 4 encode_ext_header(w);
93
94 4 return 0;
95 }
96
97 200 int ff_wmv2_encode_picture_header(MpegEncContext *s)
98 {
99 200 WMV2EncContext *const w = (WMV2EncContext *) s;
100
101 200 put_bits(&s->pb, 1, s->pict_type - 1);
102
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200 if (s->pict_type == AV_PICTURE_TYPE_I)
103 20 put_bits(&s->pb, 7, 0);
104 200 put_bits(&s->pb, 5, s->qscale);
105
106 200 s->dc_table_index = 1;
107 200 s->mv_table_index = 1; /* only if P-frame */
108 200 s->per_mb_rl_table = 0;
109 200 s->mspel = 0;
110 200 w->per_mb_abt = 0;
111 200 w->abt_type = 0;
112 200 w->j_type = 0;
113
114
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200 av_assert0(s->flipflop_rounding);
115
116
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200 if (s->pict_type == AV_PICTURE_TYPE_I) {
117
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20 av_assert0(s->no_rounding == 1);
118
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20 if (w->j_type_bit)
119 20 put_bits(&s->pb, 1, w->j_type);
120
121
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20 if (w->per_mb_rl_bit)
122 20 put_bits(&s->pb, 1, s->per_mb_rl_table);
123
124
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20 if (!s->per_mb_rl_table) {
125 20 ff_msmpeg4_code012(&s->pb, s->rl_chroma_table_index);
126 20 ff_msmpeg4_code012(&s->pb, s->rl_table_index);
127 }
128
129 20 put_bits(&s->pb, 1, s->dc_table_index);
130
131 20 s->inter_intra_pred = 0;
132 } else {
133 int cbp_index;
134
135 180 put_bits(&s->pb, 2, SKIP_TYPE_NONE);
136
137 180 ff_msmpeg4_code012(&s->pb, cbp_index = 0);
138 180 w->cbp_table_index = wmv2_get_cbp_table_index(s, cbp_index);
139
140
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180 if (w->mspel_bit)
141 180 put_bits(&s->pb, 1, s->mspel);
142
143
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180 if (w->abt_flag) {
144 180 put_bits(&s->pb, 1, w->per_mb_abt ^ 1);
145
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180 if (!w->per_mb_abt)
146 180 ff_msmpeg4_code012(&s->pb, w->abt_type);
147 }
148
149
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180 if (w->per_mb_rl_bit)
150 180 put_bits(&s->pb, 1, s->per_mb_rl_table);
151
152
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180 if (!s->per_mb_rl_table) {
153 180 ff_msmpeg4_code012(&s->pb, s->rl_table_index);
154 180 s->rl_chroma_table_index = s->rl_table_index;
155 }
156 180 put_bits(&s->pb, 1, s->dc_table_index);
157 180 put_bits(&s->pb, 1, s->mv_table_index);
158
159 180 s->inter_intra_pred = 0; // (s->width * s->height < 320 * 240 && s->bit_rate <= II_BITRATE);
160 }
161 200 s->esc3_level_length = 0;
162 200 s->esc3_run_length = 0;
163
164 200 return 0;
165 }
166
167 /* Nearly identical to wmv1 but that is just because we do not use the
168 * useless M$ crap features. It is duplicated here in case someone wants
169 * to add support for these crap features. */
170 59850 void ff_wmv2_encode_mb(MpegEncContext *s, int16_t block[6][64],
171 int motion_x, int motion_y)
172 {
173 59850 WMV2EncContext *const w = (WMV2EncContext *) s;
174 int cbp, coded_cbp, i;
175 int pred_x, pred_y;
176 uint8_t *coded_block;
177
178 59850 ff_msmpeg4_handle_slices(s);
179
180
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59850 if (!s->mb_intra) {
181 /* compute cbp */
182 51711 cbp = 0;
183
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361977 for (i = 0; i < 6; i++)
184
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310266 if (s->block_last_index[i] >= 0)
185 109321 cbp |= 1 << (5 - i);
186
187 51711 put_bits(&s->pb,
188 51711 ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
189 51711 ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);
190
191 51711 s->misc_bits += get_bits_diff(s);
192 /* motion vector */
193 51711 ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
194 51711 ff_msmpeg4_encode_motion(s, motion_x - pred_x,
195 motion_y - pred_y);
196 51711 s->mv_bits += get_bits_diff(s);
197 } else {
198 /* compute cbp */
199 8139 cbp = 0;
200 8139 coded_cbp = 0;
201
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56973 for (i = 0; i < 6; i++) {
202 int val, pred;
203 48834 val = (s->block_last_index[i] >= 1);
204 48834 cbp |= val << (5 - i);
205
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48834 if (i < 4) {
206 /* predict value for close blocks only for luma */
207 32556 pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
208 32556 *coded_block = val;
209 32556 val = val ^ pred;
210 }
211 48834 coded_cbp |= val << (5 - i);
212 }
213
214
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8139 if (s->pict_type == AV_PICTURE_TYPE_I)
215 5985 put_bits(&s->pb,
216 5985 ff_msmp4_mb_i_table[coded_cbp][1],
217 5985 ff_msmp4_mb_i_table[coded_cbp][0]);
218 else
219 2154 put_bits(&s->pb,
220 2154 ff_wmv2_inter_table[w->cbp_table_index][cbp][1],
221 2154 ff_wmv2_inter_table[w->cbp_table_index][cbp][0]);
222 8139 put_bits(&s->pb, 1, 0); /* no AC prediction yet */
223
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8139 if (s->inter_intra_pred) {
224 s->h263_aic_dir = 0;
225 put_bits(&s->pb,
226 ff_table_inter_intra[s->h263_aic_dir][1],
227 ff_table_inter_intra[s->h263_aic_dir][0]);
228 }
229 8139 s->misc_bits += get_bits_diff(s);
230 }
231
232
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418950 for (i = 0; i < 6; i++)
233 359100 ff_msmpeg4_encode_block(s, block[i], i);
234
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59850 if (s->mb_intra)
235 8139 s->i_tex_bits += get_bits_diff(s);
236 else
237 51711 s->p_tex_bits += get_bits_diff(s);
238 59850 }
239
240 const FFCodec ff_wmv2_encoder = {
241 .p.name = "wmv2",
242 CODEC_LONG_NAME("Windows Media Video 8"),
243 .p.type = AVMEDIA_TYPE_VIDEO,
244 .p.id = AV_CODEC_ID_WMV2,
245 .p.priv_class = &ff_mpv_enc_class,
246 .p.capabilities = AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
247 .priv_data_size = sizeof(WMV2EncContext),
248 .init = wmv2_encode_init,
249 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
250 .close = ff_mpv_encode_end,
251 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
252 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
253 AV_PIX_FMT_NONE },
254 };
255