FFmpeg
mjpegenc_common.h
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1 /*
2  * lossless JPEG shared bits
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 #ifndef AVCODEC_MJPEGENC_COMMON_H
22 #define AVCODEC_MJPEGENC_COMMON_H
23 
24 #include <stdint.h>
25 
26 #include "avcodec.h"
27 #include "idctdsp.h"
28 #include "put_bits.h"
29 
30 struct MJpegContext;
31 
33  size_t *max_pkt_size);
35  const AVFrame *frame, struct MJpegContext *m,
36  ScanTable *intra_scantable, int pred,
37  uint16_t luma_intra_matrix[64],
38  uint16_t chroma_intra_matrix[64],
39  int use_slices);
40 void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits);
41 void ff_mjpeg_escape_FF(PutBitContext *pb, int start);
42 void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
43  const uint8_t *bits_table,
44  const uint8_t *val_table);
45 void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4]);
46 
48  uint8_t *huff_size, uint16_t *huff_code);
49 
51 
52 #endif /* AVCODEC_MJPEGENC_COMMON_H */
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
ff_mjpeg_encode_picture_header
void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb, const AVFrame *frame, struct MJpegContext *m, ScanTable *intra_scantable, int pred, uint16_t luma_intra_matrix[64], uint16_t chroma_intra_matrix[64], int use_slices)
Definition: mjpegenc_common.c:278
val
static double val(void *priv, double ch)
Definition: aeval.c:77
ff_mjpeg_encode_picture_trailer
void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits)
Definition: mjpegenc_common.c:463
PutBitContext
Definition: put_bits.h:50
ff_mjpeg_escape_FF
void ff_mjpeg_escape_FF(PutBitContext *pb, int start)
Definition: mjpegenc_common.c:386
ff_mjpeg_add_icc_profile_size
int ff_mjpeg_add_icc_profile_size(AVCodecContext *avctx, const AVFrame *frame, size_t *max_pkt_size)
Definition: mjpegenc_common.c:140
ff_mjpeg_init_hvsample
void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4])
Definition: mjpegenc_common.c:252
idctdsp.h
avcodec.h
pred
static const float pred[4]
Definition: siprdata.h:259
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
ff_mjpeg_encode_dc
void ff_mjpeg_encode_dc(PutBitContext *pb, int val, uint8_t *huff_size, uint16_t *huff_code)
Definition: mjpegenc_common.c:470
AVCodecContext
main external API structure.
Definition: avcodec.h:398
MJpegContext
Holds JPEG frame data and Huffman table data.
Definition: mjpegenc.h:59
ScanTable
Scantable.
Definition: idctdsp.h:31
ff_mjpeg_build_huffman_codes
void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code, const uint8_t *bits_table, const uint8_t *val_table)
Definition: mjpegenc_common.c:443
put_bits.h
ff_mjpeg_encode_check_pix_fmt
int ff_mjpeg_encode_check_pix_fmt(AVCodecContext *avctx)
Definition: mjpegenc_common.c:492