diff options
Diffstat (limited to 'libavcodec/mjpegenc.c')
| -rw-r--r-- | libavcodec/mjpegenc.c | 350 |
1 files changed, 1 insertions, 349 deletions
diff --git a/libavcodec/mjpegenc.c b/libavcodec/mjpegenc.c index d76e9ba9fb..ce230ade27 100644 --- a/libavcodec/mjpegenc.c +++ b/libavcodec/mjpegenc.c @@ -33,6 +33,7 @@ #include "libavutil/pixdesc.h" #include "avcodec.h" +#include "mjpegenc_common.h" #include "mpegvideo.h" #include "mjpeg.h" #include "mjpegenc.h" @@ -80,355 +81,6 @@ 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(PutBitContext *p, int table_class, int table_id, - const uint8_t *bits_table, const uint8_t *value_table) -{ - 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(AVCodecContext *avctx, PutBitContext *p, - ScanTable *intra_scantable, - uint16_t luma_intra_matrix[64], - uint16_t chroma_intra_matrix[64], - int hsample[3]) -{ - int i, j, size; - uint8_t *ptr; - - if (avctx->codec_id != AV_CODEC_ID_LJPEG) { - int matrix_count = 1 + !!memcmp(luma_intra_matrix, - chroma_intra_matrix, - sizeof(luma_intra_matrix[0]) * 64); - /* 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(i=0;i<64;i++) { - j = intra_scantable->permutated[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(i=0;i<64;i++) { - j = intra_scantable->permutated[i]; - put_bits(p, 8, chroma_intra_matrix[j]); - } - } - } - - if(avctx->active_thread_type & FF_THREAD_SLICE){ - 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; - size += put_huffman_table(p, 0, 0, avpriv_mjpeg_bits_dc_luminance, - avpriv_mjpeg_val_dc); - size += put_huffman_table(p, 0, 1, avpriv_mjpeg_bits_dc_chrominance, - avpriv_mjpeg_val_dc); - - size += put_huffman_table(p, 1, 0, avpriv_mjpeg_bits_ac_luminance, - avpriv_mjpeg_val_ac_luminance); - size += put_huffman_table(p, 1, 1, avpriv_mjpeg_bits_ac_chrominance, - avpriv_mjpeg_val_ac_chrominance); - AV_WB16(ptr, size); -} - -static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p) -{ - int size; - uint8_t *ptr; - - if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) { - /* JFIF header */ - put_marker(p, APP0); - put_bits(p, 16, 16); - avpriv_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */ - put_bits(p, 16, 0x0102); /* v 1.02 */ - put_bits(p, 8, 0); /* units type: 0 - aspect ratio */ - put_bits(p, 16, avctx->sample_aspect_ratio.num); - put_bits(p, 16, avctx->sample_aspect_ratio.den); - put_bits(p, 8, 0); /* thumbnail width */ - put_bits(p, 8, 0); /* thumbnail height */ - } - - /* comment */ - if (!(avctx->flags & CODEC_FLAG_BITEXACT)) { - put_marker(p, COM); - flush_put_bits(p); - ptr = put_bits_ptr(p); - put_bits(p, 16, 0); /* patched later */ - avpriv_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) { - put_marker(p, COM); - flush_put_bits(p); - ptr = put_bits_ptr(p); - put_bits(p, 16, 0); /* patched later */ - avpriv_put_string(p, "CS=ITU601", 1); - size = strlen("CS=ITU601")+3; - AV_WB16(ptr, size); - } -} - -void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[3], int vsample[3]) -{ - int chroma_h_shift, chroma_v_shift; - - av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, - &chroma_v_shift); - 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] = 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 { - 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, - ScanTable *intra_scantable, - uint16_t luma_intra_matrix[64], - uint16_t chroma_intra_matrix[64]) -{ - const int lossless = avctx->codec_id != AV_CODEC_ID_MJPEG && avctx->codec_id != AV_CODEC_ID_AMV; - int hsample[3], vsample[3]; - int i; - int chroma_matrix = !!memcmp(luma_intra_matrix, - chroma_intra_matrix, - sizeof(luma_intra_matrix[0])*64); - - ff_mjpeg_init_hvsample(avctx, hsample, vsample); - - put_marker(pb, SOI); - - // hack for AMV mjpeg format - if(avctx->codec_id == AV_CODEC_ID_AMV) goto end; - - jpeg_put_comments(avctx, pb); - - jpeg_table_header(avctx, pb, intra_scantable, luma_intra_matrix, chroma_intra_matrix, hsample); - - 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, 17); - 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, 3); /* 3 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 */ - - /* scan header */ - put_marker(pb, SOS); - put_bits(pb, 16, 12); /* length */ - put_bits(pb, 8, 3); /* 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 */ - - put_bits(pb, 8, lossless ? avctx->prediction_method + 1 : 0); /* Ss (not used) */ - - 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) */ - -end: - if (!lossless) { - MpegEncContext *s = avctx->priv_data; - av_assert0(avctx->codec->priv_data_size == sizeof(MpegEncContext)); - - s->esc_pos = put_bits_count(pb) >> 3; - for(i=1; i<s->slice_context_count; i++) - s->thread_context[i]->esc_pos = 0; - } -} - -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_bits_count(pb) - start * 8; - - av_assert1((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; - - flush_put_bits(pb); - 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; - } -} - -void ff_mjpeg_encode_stuffing(MpegEncContext *s) -{ - int i; - PutBitContext *pbc = &s->pb; - int mb_y = s->mb_y - !s->mb_x; - - ff_mjpeg_escape_FF(pbc, s->esc_pos); - - if((s->avctx->active_thread_type & FF_THREAD_SLICE) && mb_y < s->mb_height) - put_marker(pbc, RST0 + (mb_y&7)); - s->esc_pos = put_bits_count(pbc) >> 3; - - for(i=0; i<3; i++) - s->last_dc[i] = 128 << s->intra_dc_precision; -} - -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); - } -} - static void encode_block(MpegEncContext *s, int16_t *block, int n) { int mant, nbits, code, i, j; |