3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
7 * Support for external huffman table, various fixes (AVID workaround),
8 * aspecting, new decode_frame mechanism and apple mjpeg-b support
11 * This file is part of FFmpeg.
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.
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.
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
33 #include "libavutil/pixdesc.h"
36 #include "mjpegenc_common.h"
37 #include "mpegvideo.h"
41 av_cold
int ff_mjpeg_encode_init(MpegEncContext
*s
)
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
);
50 m
= av_malloc(sizeof(MJpegContext
));
52 return AVERROR(ENOMEM
);
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
,
62 ff_mjpeg_build_huffman_codes(m
->huff_size_dc_chrominance
,
63 m
->huff_code_dc_chrominance
,
64 avpriv_mjpeg_bits_dc_chrominance
,
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
);
79 void ff_mjpeg_encode_close(MpegEncContext
*s
)
81 av_freep(&s
->mjpeg_ctx
);
84 static void encode_block(MpegEncContext
*s
, int16_t *block
, int n
)
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
;
93 component
= (n
<= 3 ? 0 : (n
&1) + 1);
94 dc
= block
[0]; /* overflow is impossible */
95 val
= dc
- s
->last_dc
[component
];
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
;
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
;
105 s
->last_dc
[component
] = dc
;
110 last_index
= s
->block_last_index
[n
];
111 for(i
=1;i
<=last_index
;i
++) {
112 j
= s
->intra_scantable
.permutated
[i
];
118 put_bits(&s
->pb
, huff_size_ac
[0xf0], huff_code_ac
[0xf0]);
127 nbits
= av_log2_16bit(val
) + 1;
128 code
= (run
<< 4) | nbits
;
130 put_bits(&s
->pb
, huff_size_ac
[code
], huff_code_ac
[code
]);
132 put_sbits(&s
->pb
, nbits
, mant
);
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]);
142 void ff_mjpeg_encode_mb(MpegEncContext
*s
, int16_t block
[12][64])
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);
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);
163 encode_block(s
, block
[i
], i
);
165 if (s
->chroma_format
== CHROMA_420
) {
166 encode_block(s
, block
[5], 5);
168 encode_block(s
, block
[6], 6);
169 encode_block(s
, block
[5], 5);
170 encode_block(s
, block
[7], 7);
174 s
->i_tex_bits
+= get_bits_diff(s
);
177 // maximum over s->mjpeg_vsample[i]
179 static int amv_encode_picture(AVCodecContext
*avctx
, AVPacket
*pkt
,
180 const AVFrame
*pic_arg
, int *got_packet
)
183 MpegEncContext
*s
= avctx
->priv_data
;
186 int chroma_h_shift
, chroma_v_shift
;
188 av_pix_fmt_get_chroma_sub_sample(avctx
->pix_fmt
, &chroma_h_shift
, &chroma_v_shift
);
190 //CODEC_FLAG_EMU_EDGE have to be cleared
191 if(s
->avctx
->flags
& CODEC_FLAG_EMU_EDGE
)
192 return AVERROR(EINVAL
);
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
;
203 pic
= av_frame_clone(pic_arg
);
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;
212 ret
= ff_mpv_encode_picture(avctx
, pkt
, pic
, got_packet
);
217 #if CONFIG_MJPEG_ENCODER
218 FF_MPV_GENERIC_CLASS(mjpeg
)
220 AVCodec ff_mjpeg_encoder
= {
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
233 .priv_class
= &mjpeg_class
,
236 #if CONFIG_AMV_ENCODER
237 FF_MPV_GENERIC_CLASS(amv
)
239 AVCodec ff_amv_encoder
= {
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
251 .priv_class
= &amv_class
,