diff options
Diffstat (limited to 'libavcodec')
-rw-r--r-- | libavcodec/huffyuv.c | 104 |
1 files changed, 71 insertions, 33 deletions
diff --git a/libavcodec/huffyuv.c b/libavcodec/huffyuv.c index ca5609b..0d0bb5f 100644 --- a/libavcodec/huffyuv.c +++ b/libavcodec/huffyuv.c @@ -70,6 +70,7 @@ typedef struct HYuvContext{ uint64_t stats[3][256]; uint8_t len[3][256]; uint32_t bits[3][256]; + uint32_t pix_bgr_map[1<<VLC_BITS]; VLC vlc[6]; //Y,U,V,YY,YU,YV AVFrame picture; uint8_t *bitstream_buffer; @@ -319,11 +320,10 @@ static void generate_len_table(uint8_t *dst, uint64_t *stats, int size){ #endif /* CONFIG_ENCODERS */ static void generate_joint_tables(HYuvContext *s){ - // TODO rgb + uint16_t symbols[1<<VLC_BITS]; + uint16_t bits[1<<VLC_BITS]; + uint8_t len[1<<VLC_BITS]; if(s->bitstream_bpp < 24){ - uint16_t symbols[1<<VLC_BITS]; - uint16_t bits[1<<VLC_BITS]; - uint8_t len[1<<VLC_BITS]; int p, i, y, u; for(p=0; p<3; p++){ for(i=y=0; y<256; y++){ @@ -345,6 +345,46 @@ static void generate_joint_tables(HYuvContext *s){ free_vlc(&s->vlc[3+p]); init_vlc_sparse(&s->vlc[3+p], VLC_BITS, i, len, 1, 1, bits, 2, 2, symbols, 2, 2, 0); } + }else{ + uint8_t (*map)[4] = (uint8_t(*)[4])s->pix_bgr_map; + int i, b, g, r, code; + int p0 = s->decorrelate; + int p1 = !s->decorrelate; + // restrict the range to +/-16 becaues that's pretty much guaranteed to + // cover all the combinations that fit in 11 bits total, and it doesn't + // matter if we miss a few rare codes. + for(i=0, g=-16; g<16; g++){ + int len0 = s->len[p0][g&255]; + int limit0 = VLC_BITS - len0; + if(limit0 < 2) + continue; + for(b=-16; b<16; b++){ + int len1 = s->len[p1][b&255]; + int limit1 = limit0 - len1; + if(limit1 < 1) + continue; + code = (s->bits[p0][g&255] << len1) + s->bits[p1][b&255]; + for(r=-16; r<16; r++){ + int len2 = s->len[2][r&255]; + if(len2 > limit1) + continue; + len[i] = len0 + len1 + len2; + bits[i] = (code << len2) + s->bits[2][r&255]; + if(s->decorrelate){ + map[i][G] = g; + map[i][B] = g+b; + map[i][R] = g+r; + }else{ + map[i][B] = g; + map[i][G] = b; + map[i][R] = r; + } + i++; + } + } + } + free_vlc(&s->vlc[3]); + init_vlc(&s->vlc[3], VLC_BITS, i, len, 1, 1, bits, 2, 2, 0); } } @@ -816,39 +856,37 @@ static int encode_gray_bitstream(HYuvContext *s, int count){ } #endif /* CONFIG_ENCODERS */ -static void decode_bgr_bitstream(HYuvContext *s, int count){ +static av_always_inline void decode_bgr_1(HYuvContext *s, int count, int decorrelate, int alpha){ int i; - - if(s->decorrelate){ - if(s->bitstream_bpp==24){ - for(i=0; i<count; i++){ - s->temp[0][4*i+G]= get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3); - s->temp[0][4*i+B]= get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3) + s->temp[0][4*i+G]; - s->temp[0][4*i+R]= get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3) + s->temp[0][4*i+G]; - } + for(i=0; i<count; i++){ + int code = get_vlc2(&s->gb, s->vlc[3].table, VLC_BITS, 1); + if(code != -1){ + *(uint32_t*)&s->temp[0][4*i] = s->pix_bgr_map[code]; + }else if(decorrelate){ + s->temp[0][4*i+G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3); + s->temp[0][4*i+B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3) + s->temp[0][4*i+G]; + s->temp[0][4*i+R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3) + s->temp[0][4*i+G]; }else{ - for(i=0; i<count; i++){ - s->temp[0][4*i+G]= get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3); - s->temp[0][4*i+B]= get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3) + s->temp[0][4*i+G]; - s->temp[0][4*i+R]= get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3) + s->temp[0][4*i+G]; - get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3); //?! - } + s->temp[0][4*i+B] = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3); + s->temp[0][4*i+G] = get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3); + s->temp[0][4*i+R] = get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3); } + if(alpha) + get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3); //?! + } +} + +static void decode_bgr_bitstream(HYuvContext *s, int count){ + if(s->decorrelate){ + if(s->bitstream_bpp==24) + decode_bgr_1(s, count, 1, 0); + else + decode_bgr_1(s, count, 1, 1); }else{ - if(s->bitstream_bpp==24){ - for(i=0; i<count; i++){ - s->temp[0][4*i+B]= get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3); - s->temp[0][4*i+G]= get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3); - s->temp[0][4*i+R]= get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3); - } - }else{ - for(i=0; i<count; i++){ - s->temp[0][4*i+B]= get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3); - s->temp[0][4*i+G]= get_vlc2(&s->gb, s->vlc[1].table, VLC_BITS, 3); - s->temp[0][4*i+R]= get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3); - get_vlc2(&s->gb, s->vlc[2].table, VLC_BITS, 3); //?! - } - } + if(s->bitstream_bpp==24) + decode_bgr_1(s, count, 0, 0); + else + decode_bgr_1(s, count, 0, 1); } } |