| /* |
| * 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, |
| const MJpegContext *m, |
| const uint8_t intra_matrix_permutation[64], |
| const uint16_t luma_intra_matrix[64], |
| const 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(const 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, const struct MJpegContext *m, |
| const uint8_t intra_matrix_permutation[64], int pred, |
| const uint16_t luma_intra_matrix[64], |
| const 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, |
| const uint8_t huff_size[], const 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; |
| } |
