RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
ffmpeg/libavcodec/mjpegenc_common.c

504 lines
16 KiB
C
Raw Permalink Blame History

/*
* lossless JPEG shared bits
* Copyright (c) 2000, 2001 Fabrice Bellard
* Copyright (c) 2003 Alex Beregszaszi
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <string.h>
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "avcodec.h"
#include "idctdsp.h"
#include "jpegtables.h"
#include "put_bits.h"
#include "mjpegenc.h"
#include "mjpegenc_common.h"
#include "mjpeg.h"
#include "version.h"
/* table_class: 0 = DC coef, 1 = AC coefs */
static int put_huffman_table(PutBitContext *p, int table_class, int table_id,
const uint8_t *bits_table, const uint8_t *value_table)
{
int n = 0;
put_bits(p, 4, table_class);
put_bits(p, 4, table_id);
for (int i = 1; i <= 16; i++) {
n += bits_table[i];
put_bits(p, 8, bits_table[i]);
}
for (int i = 0; i < n; i++)
put_bits(p, 8, value_table[i]);
return n + 17;
}
static void jpeg_table_header(AVCodecContext *avctx, PutBitContext *p,
MJpegContext *m,
const uint8_t intra_matrix_permutation[64],
uint16_t luma_intra_matrix[64],
uint16_t chroma_intra_matrix[64],
int hsample[3], int use_slices, int matrices_differ)
{
int size;
uint8_t *ptr;
if (m) {
int matrix_count = 1 + matrices_differ;
if (m->force_duplicated_matrix)
matrix_count = 2;
/* quant matrixes */
put_marker(p, DQT);
put_bits(p, 16, 2 + matrix_count * (1 + 64));
put_bits(p, 4, 0); /* 8 bit precision */
put_bits(p, 4, 0); /* table 0 */
for (int i = 0; i < 64; i++) {
uint8_t j = intra_matrix_permutation[i];
put_bits(p, 8, luma_intra_matrix[j]);
}
if (matrix_count > 1) {
put_bits(p, 4, 0); /* 8 bit precision */
put_bits(p, 4, 1); /* table 1 */
for (int i = 0; i < 64; i++) {
uint8_t j = intra_matrix_permutation[i];
put_bits(p, 8, chroma_intra_matrix[j]);
}
}
}
if (use_slices) {
put_marker(p, DRI);
put_bits(p, 16, 4);
put_bits(p, 16, (avctx->width-1)/(8*hsample[0]) + 1);
}
/* huffman table */
put_marker(p, DHT);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
size = 2;
// Only MJPEG can have a variable Huffman variable. All other
// formats use the default Huffman table.
if (m && m->huffman == HUFFMAN_TABLE_OPTIMAL) {
size += put_huffman_table(p, 0, 0, m->bits_dc_luminance,
m->val_dc_luminance);
size += put_huffman_table(p, 0, 1, m->bits_dc_chrominance,
m->val_dc_chrominance);
size += put_huffman_table(p, 1, 0, m->bits_ac_luminance,
m->val_ac_luminance);
size += put_huffman_table(p, 1, 1, m->bits_ac_chrominance,
m->val_ac_chrominance);
} else {
size += put_huffman_table(p, 0, 0, ff_mjpeg_bits_dc_luminance,
ff_mjpeg_val_dc);
size += put_huffman_table(p, 0, 1, ff_mjpeg_bits_dc_chrominance,
ff_mjpeg_val_dc);
size += put_huffman_table(p, 1, 0, ff_mjpeg_bits_ac_luminance,
ff_mjpeg_val_ac_luminance);
size += put_huffman_table(p, 1, 1, ff_mjpeg_bits_ac_chrominance,
ff_mjpeg_val_ac_chrominance);
}
AV_WB16(ptr, size);
}
enum {
ICC_HDR_SIZE = 16, /* ICC_PROFILE\0 tag + 4 bytes */
ICC_CHUNK_SIZE = UINT16_MAX - ICC_HDR_SIZE,
ICC_MAX_CHUNKS = UINT8_MAX,
};
int ff_mjpeg_add_icc_profile_size(AVCodecContext *avctx, const AVFrame *frame,
size_t *max_pkt_size)
{
const AVFrameSideData *sd;
size_t new_pkt_size;
int nb_chunks;
sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
if (!sd || !sd->size)
return 0;
if (sd->size > ICC_MAX_CHUNKS * ICC_CHUNK_SIZE) {
av_log(avctx, AV_LOG_ERROR, "Cannot store %"SIZE_SPECIFIER" byte ICC "
"profile: too large for JPEG\n",
sd->size);
return AVERROR_INVALIDDATA;
}
nb_chunks = (sd->size + ICC_CHUNK_SIZE - 1) / ICC_CHUNK_SIZE;
new_pkt_size = *max_pkt_size + nb_chunks * (UINT16_MAX + 2 /* APP2 marker */);
if (new_pkt_size < *max_pkt_size) /* overflow */
return AVERROR_INVALIDDATA;
*max_pkt_size = new_pkt_size;
return 0;
}
static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p,
const AVFrame *frame)
{
const AVFrameSideData *sd = NULL;
int size;
uint8_t *ptr;
if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
AVRational sar = avctx->sample_aspect_ratio;
if (sar.num > 65535 || sar.den > 65535) {
if (!av_reduce(&sar.num, &sar.den, avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 65535))
av_log(avctx, AV_LOG_WARNING,
"Cannot store exact aspect ratio %d:%d\n",
avctx->sample_aspect_ratio.num,
avctx->sample_aspect_ratio.den);
}
/* JFIF header */
put_marker(p, APP0);
put_bits(p, 16, 16);
ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
/* The most significant byte is used for major revisions, the least
* significant byte for minor revisions. Version 1.02 is the current
* released revision. */
put_bits(p, 16, 0x0102);
put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
put_bits(p, 16, sar.num);
put_bits(p, 16, sar.den);
put_bits(p, 8, 0); /* thumbnail width */
put_bits(p, 8, 0); /* thumbnail height */
}
/* ICC profile */
sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
if (sd && sd->size) {
const int nb_chunks = (sd->size + ICC_CHUNK_SIZE - 1) / ICC_CHUNK_SIZE;
const uint8_t *data = sd->data;
size_t remaining = sd->size;
/* must already be checked by the packat allocation code */
av_assert0(remaining <= ICC_MAX_CHUNKS * ICC_CHUNK_SIZE);
flush_put_bits(p);
for (int i = 0; i < nb_chunks; i++) {
size = FFMIN(remaining, ICC_CHUNK_SIZE);
av_assert1(size > 0);
ptr = put_bits_ptr(p);
ptr[0] = 0xff; /* chunk marker, not part of ICC_HDR_SIZE */
ptr[1] = APP2;
AV_WB16(ptr+2, size + ICC_HDR_SIZE);
AV_WL32(ptr+4, MKTAG('I','C','C','_'));
AV_WL32(ptr+8, MKTAG('P','R','O','F'));
AV_WL32(ptr+12, MKTAG('I','L','E','\0'));
ptr[16] = i+1;
ptr[17] = nb_chunks;
memcpy(&ptr[18], data, size);
skip_put_bytes(p, size + ICC_HDR_SIZE + 2);
remaining -= size;
data += size;
}
av_assert1(!remaining);
}
/* comment */
if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
put_marker(p, COM);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
ff_put_string(p, LIBAVCODEC_IDENT, 1);
size = strlen(LIBAVCODEC_IDENT)+3;
AV_WB16(ptr, size);
}
if (((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P) && avctx->color_range != AVCOL_RANGE_JPEG)
|| avctx->color_range == AVCOL_RANGE_MPEG) {
put_marker(p, COM);
flush_put_bits(p);
ptr = put_bits_ptr(p);
put_bits(p, 16, 0); /* patched later */
ff_put_string(p, "CS=ITU601", 1);
size = strlen("CS=ITU601")+3;
AV_WB16(ptr, size);
}
}
void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4])
{
if (avctx->codec_id == AV_CODEC_ID_LJPEG &&
( avctx->pix_fmt == AV_PIX_FMT_BGR0
|| avctx->pix_fmt == AV_PIX_FMT_BGRA
|| avctx->pix_fmt == AV_PIX_FMT_BGR24)) {
vsample[0] = hsample[0] =
vsample[1] = hsample[1] =
vsample[2] = hsample[2] =
vsample[3] = hsample[3] = 1;
} else if (avctx->pix_fmt == AV_PIX_FMT_YUV444P || avctx->pix_fmt == AV_PIX_FMT_YUVJ444P) {
vsample[0] = vsample[1] = vsample[2] = 2;
hsample[0] = hsample[1] = hsample[2] = 1;
} else {
int chroma_h_shift, chroma_v_shift;
av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
&chroma_v_shift);
vsample[0] = 2;
vsample[1] = 2 >> chroma_v_shift;
vsample[2] = 2 >> chroma_v_shift;
hsample[0] = 2;
hsample[1] = 2 >> chroma_h_shift;
hsample[2] = 2 >> chroma_h_shift;
}
}
void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb,
const AVFrame *frame, struct MJpegContext *m,
const uint8_t intra_matrix_permutation[64], int pred,
uint16_t luma_intra_matrix[64],
uint16_t chroma_intra_matrix[64],
int use_slices)
{
const int lossless = !m;
int hsample[4], vsample[4];
int components = 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA);
int chroma_matrix;
ff_mjpeg_init_hvsample(avctx, hsample, vsample);
put_marker(pb, SOI);
// hack for AMV mjpeg format
if (avctx->codec_id == AV_CODEC_ID_AMV)
return;
jpeg_put_comments(avctx, pb, frame);
chroma_matrix = !lossless && !!memcmp(luma_intra_matrix,
chroma_intra_matrix,
sizeof(luma_intra_matrix[0]) * 64);
jpeg_table_header(avctx, pb, m, intra_matrix_permutation,
luma_intra_matrix, chroma_intra_matrix, hsample,
use_slices, chroma_matrix);
switch (avctx->codec_id) {
case AV_CODEC_ID_MJPEG: put_marker(pb, SOF0 ); break;
case AV_CODEC_ID_LJPEG: put_marker(pb, SOF3 ); break;
default: av_assert0(0);
}
put_bits(pb, 16, 8 + 3 * components);
if (lossless && ( avctx->pix_fmt == AV_PIX_FMT_BGR0
|| avctx->pix_fmt == AV_PIX_FMT_BGRA
|| avctx->pix_fmt == AV_PIX_FMT_BGR24))
put_bits(pb, 8, 9); /* 9 bits/component RCT */
else
put_bits(pb, 8, 8); /* 8 bits/component */
put_bits(pb, 16, avctx->height);
put_bits(pb, 16, avctx->width);
put_bits(pb, 8, components); /* 3 or 4 components */
/* Y component */
put_bits(pb, 8, 1); /* component number */
put_bits(pb, 4, hsample[0]); /* H factor */
put_bits(pb, 4, vsample[0]); /* V factor */
put_bits(pb, 8, 0); /* select matrix */
/* Cb component */
put_bits(pb, 8, 2); /* component number */
put_bits(pb, 4, hsample[1]); /* H factor */
put_bits(pb, 4, vsample[1]); /* V factor */
put_bits(pb, 8, lossless ? 0 : chroma_matrix); /* select matrix */
/* Cr component */
put_bits(pb, 8, 3); /* component number */
put_bits(pb, 4, hsample[2]); /* H factor */
put_bits(pb, 4, vsample[2]); /* V factor */
put_bits(pb, 8, lossless ? 0 : chroma_matrix); /* select matrix */
if (components == 4) {
put_bits(pb, 8, 4); /* component number */
put_bits(pb, 4, hsample[3]); /* H factor */
put_bits(pb, 4, vsample[3]); /* V factor */
put_bits(pb, 8, 0); /* select matrix */
}
/* scan header */
put_marker(pb, SOS);
put_bits(pb, 16, 6 + 2*components); /* length */
put_bits(pb, 8, components); /* 3 components */
/* Y component */
put_bits(pb, 8, 1); /* index */
put_bits(pb, 4, 0); /* DC huffman table index */
put_bits(pb, 4, 0); /* AC huffman table index */
/* Cb component */
put_bits(pb, 8, 2); /* index */
put_bits(pb, 4, 1); /* DC huffman table index */
put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
/* Cr component */
put_bits(pb, 8, 3); /* index */
put_bits(pb, 4, 1); /* DC huffman table index */
put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
if (components == 4) {
/* Alpha component */
put_bits(pb, 8, 4); /* index */
put_bits(pb, 4, 0); /* DC huffman table index */
put_bits(pb, 4, 0); /* AC huffman table index */
}
put_bits(pb, 8, pred); /* Ss (not used); pred only nonzero for LJPEG */
switch (avctx->codec_id) {
case AV_CODEC_ID_MJPEG: put_bits(pb, 8, 63); break; /* Se (not used) */
case AV_CODEC_ID_LJPEG: put_bits(pb, 8, 0); break; /* not used */
default: av_assert0(0);
}
put_bits(pb, 8, 0); /* Ah/Al (not used) */
}
void ff_mjpeg_escape_FF(PutBitContext *pb, int start)
{
int size;
int i, ff_count;
uint8_t *buf = pb->buf + start;
int align= (-(size_t)(buf))&3;
int pad = (-put_bits_count(pb))&7;
if (pad)
put_bits(pb, pad, (1<<pad)-1);
flush_put_bits(pb);
size = put_bytes_output(pb) - start;
ff_count=0;
for(i=0; i<size && i<align; i++){
if(buf[i]==0xFF) ff_count++;
}
for(; i<size-15; i+=16){
int acc, v;
v= *(uint32_t*)(&buf[i]);
acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
v= *(uint32_t*)(&buf[i+4]);
acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
v= *(uint32_t*)(&buf[i+8]);
acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
v= *(uint32_t*)(&buf[i+12]);
acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
acc>>=4;
acc+= (acc>>16);
acc+= (acc>>8);
ff_count+= acc&0xFF;
}
for(; i<size; i++){
if(buf[i]==0xFF) ff_count++;
}
if(ff_count==0) return;
skip_put_bytes(pb, ff_count);
for(i=size-1; ff_count; i--){
int v= buf[i];
if(v==0xFF){
buf[i+ff_count]= 0;
ff_count--;
}
buf[i+ff_count]= v;
}
}
/* isn't this function nicer than the one in the libjpeg ? */
void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
const uint8_t *bits_table,
const uint8_t *val_table)
{
int k, code;
k = 0;
code = 0;
for (int i = 1; i <= 16; i++) {
int nb = bits_table[i];
for (int j = 0; j < nb; j++) {
int sym = val_table[k++];
huff_size[sym] = i;
huff_code[sym] = code;
code++;
}
code <<= 1;
}
}
void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits)
{
av_assert1((header_bits & 7) == 0);
put_marker(pb, EOI);
}
void ff_mjpeg_encode_dc(PutBitContext *pb, int val,
uint8_t *huff_size, uint16_t *huff_code)
{
int mant, nbits;
if (val == 0) {
put_bits(pb, huff_size[0], huff_code[0]);
} else {
mant = val;
if (val < 0) {
val = -val;
mant--;
}
nbits= av_log2_16bit(val) + 1;
put_bits(pb, huff_size[nbits], huff_code[nbits]);
put_sbits(pb, nbits, mant);
}
}
int ff_mjpeg_encode_check_pix_fmt(AVCodecContext *avctx)
{
if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
avctx->color_range != AVCOL_RANGE_JPEG &&
(avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
avctx->color_range == AVCOL_RANGE_MPEG)) {
av_log(avctx, AV_LOG_ERROR,
"Non full-range YUV is non-standard, set strict_std_compliance "
"to at most unofficial to use it.\n");
return AVERROR(EINVAL);
}
return 0;
}
Reference in New Issue View Git Blame Copy Permalink