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2ba45a60 DM |
1 | /* |
2 | * MJPEG encoder | |
3 | * Copyright (c) 2000, 2001 Fabrice Bellard | |
4 | * Copyright (c) 2003 Alex Beregszaszi | |
5 | * Copyright (c) 2003-2004 Michael Niedermayer | |
6 | * | |
7 | * Support for external huffman table, various fixes (AVID workaround), | |
8 | * aspecting, new decode_frame mechanism and apple mjpeg-b support | |
9 | * by Alex Beregszaszi | |
10 | * | |
11 | * This file is part of FFmpeg. | |
12 | * | |
13 | * FFmpeg is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU Lesser General Public | |
15 | * License as published by the Free Software Foundation; either | |
16 | * version 2.1 of the License, or (at your option) any later version. | |
17 | * | |
18 | * FFmpeg is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | * Lesser General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU Lesser General Public | |
24 | * License along with FFmpeg; if not, write to the Free Software | |
25 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
26 | */ | |
27 | ||
28 | /** | |
29 | * @file | |
30 | * MJPEG encoder. | |
31 | */ | |
32 | ||
33 | #include "libavutil/pixdesc.h" | |
34 | ||
35 | #include "avcodec.h" | |
36 | #include "mjpegenc_common.h" | |
37 | #include "mpegvideo.h" | |
38 | #include "mjpeg.h" | |
39 | #include "mjpegenc.h" | |
40 | ||
41 | av_cold int ff_mjpeg_encode_init(MpegEncContext *s) | |
42 | { | |
43 | MJpegContext *m; | |
44 | ||
45 | if (s->width > 65500 || s->height > 65500) { | |
46 | av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n"); | |
47 | return AVERROR(EINVAL); | |
48 | } | |
49 | ||
50 | m = av_malloc(sizeof(MJpegContext)); | |
51 | if (!m) | |
52 | return AVERROR(ENOMEM); | |
53 | ||
54 | s->min_qcoeff=-1023; | |
55 | s->max_qcoeff= 1023; | |
56 | ||
57 | /* build all the huffman tables */ | |
58 | ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance, | |
59 | m->huff_code_dc_luminance, | |
60 | avpriv_mjpeg_bits_dc_luminance, | |
61 | avpriv_mjpeg_val_dc); | |
62 | ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance, | |
63 | m->huff_code_dc_chrominance, | |
64 | avpriv_mjpeg_bits_dc_chrominance, | |
65 | avpriv_mjpeg_val_dc); | |
66 | ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance, | |
67 | m->huff_code_ac_luminance, | |
68 | avpriv_mjpeg_bits_ac_luminance, | |
69 | avpriv_mjpeg_val_ac_luminance); | |
70 | ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance, | |
71 | m->huff_code_ac_chrominance, | |
72 | avpriv_mjpeg_bits_ac_chrominance, | |
73 | avpriv_mjpeg_val_ac_chrominance); | |
74 | ||
75 | s->mjpeg_ctx = m; | |
76 | return 0; | |
77 | } | |
78 | ||
79 | void ff_mjpeg_encode_close(MpegEncContext *s) | |
80 | { | |
f6fa7814 | 81 | av_freep(&s->mjpeg_ctx); |
2ba45a60 DM |
82 | } |
83 | ||
84 | static void encode_block(MpegEncContext *s, int16_t *block, int n) | |
85 | { | |
86 | int mant, nbits, code, i, j; | |
87 | int component, dc, run, last_index, val; | |
88 | MJpegContext *m = s->mjpeg_ctx; | |
89 | uint8_t *huff_size_ac; | |
90 | uint16_t *huff_code_ac; | |
91 | ||
92 | /* DC coef */ | |
93 | component = (n <= 3 ? 0 : (n&1) + 1); | |
94 | dc = block[0]; /* overflow is impossible */ | |
95 | val = dc - s->last_dc[component]; | |
96 | if (n < 4) { | |
97 | ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance); | |
98 | huff_size_ac = m->huff_size_ac_luminance; | |
99 | huff_code_ac = m->huff_code_ac_luminance; | |
100 | } else { | |
101 | ff_mjpeg_encode_dc(&s->pb, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance); | |
102 | huff_size_ac = m->huff_size_ac_chrominance; | |
103 | huff_code_ac = m->huff_code_ac_chrominance; | |
104 | } | |
105 | s->last_dc[component] = dc; | |
106 | ||
107 | /* AC coefs */ | |
108 | ||
109 | run = 0; | |
110 | last_index = s->block_last_index[n]; | |
111 | for(i=1;i<=last_index;i++) { | |
112 | j = s->intra_scantable.permutated[i]; | |
113 | val = block[j]; | |
114 | if (val == 0) { | |
115 | run++; | |
116 | } else { | |
117 | while (run >= 16) { | |
118 | put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]); | |
119 | run -= 16; | |
120 | } | |
121 | mant = val; | |
122 | if (val < 0) { | |
123 | val = -val; | |
124 | mant--; | |
125 | } | |
126 | ||
127 | nbits= av_log2_16bit(val) + 1; | |
128 | code = (run << 4) | nbits; | |
129 | ||
130 | put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]); | |
131 | ||
132 | put_sbits(&s->pb, nbits, mant); | |
133 | run = 0; | |
134 | } | |
135 | } | |
136 | ||
137 | /* output EOB only if not already 64 values */ | |
138 | if (last_index < 63 || run != 0) | |
139 | put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]); | |
140 | } | |
141 | ||
142 | void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64]) | |
143 | { | |
144 | int i; | |
145 | if (s->chroma_format == CHROMA_444) { | |
146 | encode_block(s, block[0], 0); | |
147 | encode_block(s, block[2], 2); | |
148 | encode_block(s, block[4], 4); | |
149 | encode_block(s, block[8], 8); | |
150 | encode_block(s, block[5], 5); | |
151 | encode_block(s, block[9], 9); | |
152 | ||
153 | if (16*s->mb_x+8 < s->width) { | |
154 | encode_block(s, block[1], 1); | |
155 | encode_block(s, block[3], 3); | |
156 | encode_block(s, block[6], 6); | |
157 | encode_block(s, block[10], 10); | |
158 | encode_block(s, block[7], 7); | |
159 | encode_block(s, block[11], 11); | |
160 | } | |
161 | } else { | |
162 | for(i=0;i<5;i++) { | |
163 | encode_block(s, block[i], i); | |
164 | } | |
165 | if (s->chroma_format == CHROMA_420) { | |
166 | encode_block(s, block[5], 5); | |
167 | } else { | |
168 | encode_block(s, block[6], 6); | |
169 | encode_block(s, block[5], 5); | |
170 | encode_block(s, block[7], 7); | |
171 | } | |
172 | } | |
173 | ||
174 | s->i_tex_bits += get_bits_diff(s); | |
175 | } | |
176 | ||
177 | // maximum over s->mjpeg_vsample[i] | |
178 | #define V_MAX 2 | |
179 | static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, | |
180 | const AVFrame *pic_arg, int *got_packet) | |
181 | ||
182 | { | |
183 | MpegEncContext *s = avctx->priv_data; | |
184 | AVFrame *pic; | |
185 | int i, ret; | |
186 | int chroma_h_shift, chroma_v_shift; | |
187 | ||
188 | av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, &chroma_v_shift); | |
189 | ||
190 | //CODEC_FLAG_EMU_EDGE have to be cleared | |
191 | if(s->avctx->flags & CODEC_FLAG_EMU_EDGE) | |
192 | return AVERROR(EINVAL); | |
193 | ||
194 | if ((avctx->height & 15) && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) { | |
195 | av_log(avctx, AV_LOG_ERROR, | |
196 | "Heights which are not a multiple of 16 might fail with some decoders, " | |
197 | "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->height); | |
198 | av_log(avctx, AV_LOG_WARNING, "If you have a device that plays AMV videos, please test if videos " | |
199 | "with such heights work with it and report your findings to ffmpeg-devel@ffmpeg.org\n"); | |
200 | return AVERROR_EXPERIMENTAL; | |
201 | } | |
202 | ||
203 | pic = av_frame_clone(pic_arg); | |
204 | if (!pic) | |
205 | return AVERROR(ENOMEM); | |
206 | //picture should be flipped upside-down | |
207 | for(i=0; i < 3; i++) { | |
208 | int vsample = i ? 2 >> chroma_v_shift : 2; | |
209 | pic->data[i] += pic->linesize[i] * (vsample * s->height / V_MAX - 1); | |
210 | pic->linesize[i] *= -1; | |
211 | } | |
212 | ret = ff_mpv_encode_picture(avctx, pkt, pic, got_packet); | |
213 | av_frame_free(&pic); | |
214 | return ret; | |
215 | } | |
216 | ||
217 | #if CONFIG_MJPEG_ENCODER | |
f6fa7814 DM |
218 | FF_MPV_GENERIC_CLASS(mjpeg) |
219 | ||
2ba45a60 DM |
220 | AVCodec ff_mjpeg_encoder = { |
221 | .name = "mjpeg", | |
222 | .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"), | |
223 | .type = AVMEDIA_TYPE_VIDEO, | |
224 | .id = AV_CODEC_ID_MJPEG, | |
225 | .priv_data_size = sizeof(MpegEncContext), | |
226 | .init = ff_mpv_encode_init, | |
227 | .encode2 = ff_mpv_encode_picture, | |
228 | .close = ff_mpv_encode_end, | |
229 | .capabilities = CODEC_CAP_SLICE_THREADS | CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY, | |
230 | .pix_fmts = (const enum AVPixelFormat[]){ | |
231 | AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE | |
232 | }, | |
f6fa7814 | 233 | .priv_class = &mjpeg_class, |
2ba45a60 DM |
234 | }; |
235 | #endif | |
236 | #if CONFIG_AMV_ENCODER | |
f6fa7814 DM |
237 | FF_MPV_GENERIC_CLASS(amv) |
238 | ||
2ba45a60 DM |
239 | AVCodec ff_amv_encoder = { |
240 | .name = "amv", | |
241 | .long_name = NULL_IF_CONFIG_SMALL("AMV Video"), | |
242 | .type = AVMEDIA_TYPE_VIDEO, | |
243 | .id = AV_CODEC_ID_AMV, | |
244 | .priv_data_size = sizeof(MpegEncContext), | |
245 | .init = ff_mpv_encode_init, | |
246 | .encode2 = amv_encode_picture, | |
247 | .close = ff_mpv_encode_end, | |
248 | .pix_fmts = (const enum AVPixelFormat[]){ | |
249 | AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_NONE | |
250 | }, | |
f6fa7814 | 251 | .priv_class = &amv_class, |
2ba45a60 DM |
252 | }; |
253 | #endif |