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