diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/mjpegenc.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/mjpegenc.c | 458 |
1 files changed, 458 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/mjpegenc.c b/contrib/ffmpeg/libavcodec/mjpegenc.c new file mode 100644 index 000000000..b5e5a827d --- /dev/null +++ b/contrib/ffmpeg/libavcodec/mjpegenc.c @@ -0,0 +1,458 @@ +/* + * MJPEG encoder + * Copyright (c) 2000, 2001 Fabrice Bellard. + * Copyright (c) 2003 Alex Beregszaszi + * Copyright (c) 2003-2004 Michael Niedermayer + * + * Support for external huffman table, various fixes (AVID workaround), + * aspecting, new decode_frame mechanism and apple mjpeg-b support + * by 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 + */ + +/** + * @file mjpegenc.c + * MJPEG encoder. + */ + +//#define DEBUG +#include <assert.h> + +#include "avcodec.h" +#include "dsputil.h" +#include "mpegvideo.h" +#include "mjpeg.h" +#include "mjpegenc.h" + +/* use two quantizer tables (one for luminance and one for chrominance) */ +/* not yet working */ +#undef TWOMATRIXES + + +int ff_mjpeg_encode_init(MpegEncContext *s) +{ + MJpegContext *m; + + m = av_malloc(sizeof(MJpegContext)); + if (!m) + return -1; + + s->min_qcoeff=-1023; + s->max_qcoeff= 1023; + + /* build all the huffman tables */ + ff_mjpeg_build_huffman_codes(m->huff_size_dc_luminance, + m->huff_code_dc_luminance, + ff_mjpeg_bits_dc_luminance, + ff_mjpeg_val_dc_luminance); + ff_mjpeg_build_huffman_codes(m->huff_size_dc_chrominance, + m->huff_code_dc_chrominance, + ff_mjpeg_bits_dc_chrominance, + ff_mjpeg_val_dc_chrominance); + ff_mjpeg_build_huffman_codes(m->huff_size_ac_luminance, + m->huff_code_ac_luminance, + ff_mjpeg_bits_ac_luminance, + ff_mjpeg_val_ac_luminance); + ff_mjpeg_build_huffman_codes(m->huff_size_ac_chrominance, + m->huff_code_ac_chrominance, + ff_mjpeg_bits_ac_chrominance, + ff_mjpeg_val_ac_chrominance); + + s->mjpeg_ctx = m; + return 0; +} + +void ff_mjpeg_encode_close(MpegEncContext *s) +{ + av_free(s->mjpeg_ctx); +} + +/* table_class: 0 = DC coef, 1 = AC coefs */ +static int put_huffman_table(MpegEncContext *s, int table_class, int table_id, + const uint8_t *bits_table, const uint8_t *value_table) +{ + PutBitContext *p = &s->pb; + int n, i; + + put_bits(p, 4, table_class); + put_bits(p, 4, table_id); + + n = 0; + for(i=1;i<=16;i++) { + n += bits_table[i]; + put_bits(p, 8, bits_table[i]); + } + + for(i=0;i<n;i++) + put_bits(p, 8, value_table[i]); + + return n + 17; +} + +static void jpeg_table_header(MpegEncContext *s) +{ + PutBitContext *p = &s->pb; + int i, j, size; + uint8_t *ptr; + + /* quant matrixes */ + put_marker(p, DQT); +#ifdef TWOMATRIXES + put_bits(p, 16, 2 + 2 * (1 + 64)); +#else + put_bits(p, 16, 2 + 1 * (1 + 64)); +#endif + put_bits(p, 4, 0); /* 8 bit precision */ + put_bits(p, 4, 0); /* table 0 */ + for(i=0;i<64;i++) { + j = s->intra_scantable.permutated[i]; + put_bits(p, 8, s->intra_matrix[j]); + } +#ifdef TWOMATRIXES + put_bits(p, 4, 0); /* 8 bit precision */ + put_bits(p, 4, 1); /* table 1 */ + for(i=0;i<64;i++) { + j = s->intra_scantable.permutated[i]; + put_bits(p, 8, s->chroma_intra_matrix[j]); + } +#endif + + /* huffman table */ + put_marker(p, DHT); + flush_put_bits(p); + ptr = pbBufPtr(p); + put_bits(p, 16, 0); /* patched later */ + size = 2; + size += put_huffman_table(s, 0, 0, ff_mjpeg_bits_dc_luminance, + ff_mjpeg_val_dc_luminance); + size += put_huffman_table(s, 0, 1, ff_mjpeg_bits_dc_chrominance, + ff_mjpeg_val_dc_chrominance); + + size += put_huffman_table(s, 1, 0, ff_mjpeg_bits_ac_luminance, + ff_mjpeg_val_ac_luminance); + size += put_huffman_table(s, 1, 1, ff_mjpeg_bits_ac_chrominance, + ff_mjpeg_val_ac_chrominance); + AV_WB16(ptr, size); +} + +static void jpeg_put_comments(MpegEncContext *s) +{ + PutBitContext *p = &s->pb; + int size; + uint8_t *ptr; + + if (s->aspect_ratio_info /* && !lossless */) + { + /* JFIF header */ + put_marker(p, APP0); + put_bits(p, 16, 16); + ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */ + put_bits(p, 16, 0x0201); /* v 1.02 */ + put_bits(p, 8, 0); /* units type: 0 - aspect ratio */ + put_bits(p, 16, s->avctx->sample_aspect_ratio.num); + put_bits(p, 16, s->avctx->sample_aspect_ratio.den); + put_bits(p, 8, 0); /* thumbnail width */ + put_bits(p, 8, 0); /* thumbnail height */ + } + + /* comment */ + if(!(s->flags & CODEC_FLAG_BITEXACT)){ + put_marker(p, COM); + flush_put_bits(p); + ptr = pbBufPtr(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( s->avctx->pix_fmt == PIX_FMT_YUV420P + ||s->avctx->pix_fmt == PIX_FMT_YUV422P + ||s->avctx->pix_fmt == PIX_FMT_YUV444P){ + put_marker(p, COM); + flush_put_bits(p); + ptr = pbBufPtr(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_encode_picture_header(MpegEncContext *s) +{ + const int lossless= s->avctx->codec_id != CODEC_ID_MJPEG; + + put_marker(&s->pb, SOI); + + jpeg_put_comments(s); + + jpeg_table_header(s); + + switch(s->avctx->codec_id){ + case CODEC_ID_MJPEG: put_marker(&s->pb, SOF0 ); break; + case CODEC_ID_LJPEG: put_marker(&s->pb, SOF3 ); break; + default: assert(0); + } + + put_bits(&s->pb, 16, 17); + if(lossless && s->avctx->pix_fmt == PIX_FMT_RGB32) + put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */ + else + put_bits(&s->pb, 8, 8); /* 8 bits/component */ + put_bits(&s->pb, 16, s->height); + put_bits(&s->pb, 16, s->width); + put_bits(&s->pb, 8, 3); /* 3 components */ + + /* Y component */ + put_bits(&s->pb, 8, 1); /* component number */ + put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */ + put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */ + put_bits(&s->pb, 8, 0); /* select matrix */ + + /* Cb component */ + put_bits(&s->pb, 8, 2); /* component number */ + put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */ + put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */ +#ifdef TWOMATRIXES + put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */ +#else + put_bits(&s->pb, 8, 0); /* select matrix */ +#endif + + /* Cr component */ + put_bits(&s->pb, 8, 3); /* component number */ + put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */ + put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */ +#ifdef TWOMATRIXES + put_bits(&s->pb, 8, lossless ? 0 : 1); /* select matrix */ +#else + put_bits(&s->pb, 8, 0); /* select matrix */ +#endif + + /* scan header */ + put_marker(&s->pb, SOS); + put_bits(&s->pb, 16, 12); /* length */ + put_bits(&s->pb, 8, 3); /* 3 components */ + + /* Y component */ + put_bits(&s->pb, 8, 1); /* index */ + put_bits(&s->pb, 4, 0); /* DC huffman table index */ + put_bits(&s->pb, 4, 0); /* AC huffman table index */ + + /* Cb component */ + put_bits(&s->pb, 8, 2); /* index */ + put_bits(&s->pb, 4, 1); /* DC huffman table index */ + put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */ + + /* Cr component */ + put_bits(&s->pb, 8, 3); /* index */ + put_bits(&s->pb, 4, 1); /* DC huffman table index */ + put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */ + + put_bits(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */ + + switch(s->avctx->codec_id){ + case CODEC_ID_MJPEG: put_bits(&s->pb, 8, 63); break; /* Se (not used) */ + case CODEC_ID_LJPEG: put_bits(&s->pb, 8, 0); break; /* not used */ + default: assert(0); + } + + put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */ +} + +static void escape_FF(MpegEncContext *s, int start) +{ + int size= put_bits_count(&s->pb) - start*8; + int i, ff_count; + uint8_t *buf= s->pb.buf + start; + int align= (-(size_t)(buf))&3; + + assert((size&7) == 0); + size >>= 3; + + 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 bits */ + for(i=0; i<ff_count-3; i+=4) + put_bits(&s->pb, 32, 0); + put_bits(&s->pb, (ff_count-i)*8, 0); + flush_put_bits(&s->pb); + + for(i=size-1; ff_count; i--){ + int v= buf[i]; + + if(v==0xFF){ +//printf("%d %d\n", i, ff_count); + buf[i+ff_count]= 0; + ff_count--; + } + + buf[i+ff_count]= v; + } +} + +void ff_mjpeg_encode_stuffing(PutBitContext * pbc) +{ + int length; + length= (-put_bits_count(pbc))&7; + if(length) put_bits(pbc, length, (1<<length)-1); +} + +void ff_mjpeg_encode_picture_trailer(MpegEncContext *s) +{ + ff_mjpeg_encode_stuffing(&s->pb); + flush_put_bits(&s->pb); + + assert((s->header_bits&7)==0); + + escape_FF(s, s->header_bits>>3); + + put_marker(&s->pb, EOI); +} + +void ff_mjpeg_encode_dc(MpegEncContext *s, int val, + uint8_t *huff_size, uint16_t *huff_code) +{ + int mant, nbits; + + if (val == 0) { + put_bits(&s->pb, huff_size[0], huff_code[0]); + } else { + mant = val; + if (val < 0) { + val = -val; + mant--; + } + + nbits= av_log2_16bit(val) + 1; + + put_bits(&s->pb, huff_size[nbits], huff_code[nbits]); + + put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1)); + } +} + +static void encode_block(MpegEncContext *s, DCTELEM *block, int n) +{ + int mant, nbits, code, i, j; + int component, dc, run, last_index, val; + MJpegContext *m = s->mjpeg_ctx; + uint8_t *huff_size_ac; + uint16_t *huff_code_ac; + + /* DC coef */ + component = (n <= 3 ? 0 : (n&1) + 1); + dc = block[0]; /* overflow is impossible */ + val = dc - s->last_dc[component]; + if (n < 4) { + ff_mjpeg_encode_dc(s, val, m->huff_size_dc_luminance, m->huff_code_dc_luminance); + huff_size_ac = m->huff_size_ac_luminance; + huff_code_ac = m->huff_code_ac_luminance; + } else { + ff_mjpeg_encode_dc(s, val, m->huff_size_dc_chrominance, m->huff_code_dc_chrominance); + huff_size_ac = m->huff_size_ac_chrominance; + huff_code_ac = m->huff_code_ac_chrominance; + } + s->last_dc[component] = dc; + + /* AC coefs */ + + run = 0; + last_index = s->block_last_index[n]; + for(i=1;i<=last_index;i++) { + j = s->intra_scantable.permutated[i]; + val = block[j]; + if (val == 0) { + run++; + } else { + while (run >= 16) { + put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]); + run -= 16; + } + mant = val; + if (val < 0) { + val = -val; + mant--; + } + + nbits= av_log2(val) + 1; + code = (run << 4) | nbits; + + put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]); + + put_bits(&s->pb, nbits, mant & ((1 << nbits) - 1)); + run = 0; + } + } + + /* output EOB only if not already 64 values */ + if (last_index < 63 || run != 0) + put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]); +} + +void ff_mjpeg_encode_mb(MpegEncContext *s, DCTELEM block[6][64]) +{ + int i; + for(i=0;i<5;i++) { + encode_block(s, block[i], i); + } + if (s->chroma_format == CHROMA_420) { + encode_block(s, block[5], 5); + } else { + encode_block(s, block[6], 6); + encode_block(s, block[5], 5); + encode_block(s, block[7], 7); + } +} + +AVCodec mjpeg_encoder = { + "mjpeg", + CODEC_TYPE_VIDEO, + CODEC_ID_MJPEG, + sizeof(MpegEncContext), + MPV_encode_init, + MPV_encode_picture, + MPV_encode_end, + .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, -1}, +}; |