diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/mjpegenc.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/mjpegenc.c | 458 |
1 files changed, 0 insertions, 458 deletions
diff --git a/contrib/ffmpeg/libavcodec/mjpegenc.c b/contrib/ffmpeg/libavcodec/mjpegenc.c deleted file mode 100644 index b5e5a827d..000000000 --- a/contrib/ffmpeg/libavcodec/mjpegenc.c +++ /dev/null @@ -1,458 +0,0 @@ -/* - * 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}, -}; |