From 2ca5ca2957607cf9604cc6068a9ebc898ff37b06 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Thu, 6 Dec 2012 14:06:46 +0100 Subject: huffyuv: split encoder and decoder into separate files. --- libavcodec/huffyuvdec.c | 782 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 782 insertions(+) create mode 100644 libavcodec/huffyuvdec.c (limited to 'libavcodec/huffyuvdec.c') diff --git a/libavcodec/huffyuvdec.c b/libavcodec/huffyuvdec.c new file mode 100644 index 0000000000..0946d3d47e --- /dev/null +++ b/libavcodec/huffyuvdec.c @@ -0,0 +1,782 @@ +/* + * huffyuv decoder + * + * Copyright (c) 2002-2003 Michael Niedermayer + * + * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of + * the algorithm used + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * huffyuv decoder + */ + +#include "avcodec.h" +#include "dsputil.h" +#include "get_bits.h" +#include "huffyuv.h" +#include "thread.h" + +#define classic_shift_luma_table_size 42 +static const unsigned char classic_shift_luma[classic_shift_luma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = { + 34,36,35,69,135,232,9,16,10,24,11,23,12,16,13,10,14,8,15,8, + 16,8,17,20,16,10,207,206,205,236,11,8,10,21,9,23,8,8,199,70, + 69,68, 0 +}; + +#define classic_shift_chroma_table_size 59 +static const unsigned char classic_shift_chroma[classic_shift_chroma_table_size + FF_INPUT_BUFFER_PADDING_SIZE] = { + 66,36,37,38,39,40,41,75,76,77,110,239,144,81,82,83,84,85,118,183, + 56,57,88,89,56,89,154,57,58,57,26,141,57,56,58,57,58,57,184,119, + 214,245,116,83,82,49,80,79,78,77,44,75,41,40,39,38,37,36,34, 0 +}; + +static const unsigned char classic_add_luma[256] = { + 3, 9, 5, 12, 10, 35, 32, 29, 27, 50, 48, 45, 44, 41, 39, 37, + 73, 70, 68, 65, 64, 61, 58, 56, 53, 50, 49, 46, 44, 41, 38, 36, + 68, 65, 63, 61, 58, 55, 53, 51, 48, 46, 45, 43, 41, 39, 38, 36, + 35, 33, 32, 30, 29, 27, 26, 25, 48, 47, 46, 44, 43, 41, 40, 39, + 37, 36, 35, 34, 32, 31, 30, 28, 27, 26, 24, 23, 22, 20, 19, 37, + 35, 34, 33, 31, 30, 29, 27, 26, 24, 23, 21, 20, 18, 17, 15, 29, + 27, 26, 24, 22, 21, 19, 17, 16, 14, 26, 25, 23, 21, 19, 18, 16, + 15, 27, 25, 23, 21, 19, 17, 16, 14, 26, 25, 23, 21, 18, 17, 14, + 12, 17, 19, 13, 4, 9, 2, 11, 1, 7, 8, 0, 16, 3, 14, 6, + 12, 10, 5, 15, 18, 11, 10, 13, 15, 16, 19, 20, 22, 24, 27, 15, + 18, 20, 22, 24, 26, 14, 17, 20, 22, 24, 27, 15, 18, 20, 23, 25, + 28, 16, 19, 22, 25, 28, 32, 36, 21, 25, 29, 33, 38, 42, 45, 49, + 28, 31, 34, 37, 40, 42, 44, 47, 49, 50, 52, 54, 56, 57, 59, 60, + 62, 64, 66, 67, 69, 35, 37, 39, 40, 42, 43, 45, 47, 48, 51, 52, + 54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 38, 40, 42, 43, + 46, 47, 49, 51, 26, 28, 30, 31, 33, 34, 18, 19, 11, 13, 7, 8, +}; + +static const unsigned char classic_add_chroma[256] = { + 3, 1, 2, 2, 2, 2, 3, 3, 7, 5, 7, 5, 8, 6, 11, 9, + 7, 13, 11, 10, 9, 8, 7, 5, 9, 7, 6, 4, 7, 5, 8, 7, + 11, 8, 13, 11, 19, 15, 22, 23, 20, 33, 32, 28, 27, 29, 51, 77, + 43, 45, 76, 81, 46, 82, 75, 55, 56,144, 58, 80, 60, 74,147, 63, + 143, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, + 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 27, 30, 21, 22, + 17, 14, 5, 6,100, 54, 47, 50, 51, 53,106,107,108,109,110,111, + 112,113,114,115, 4,117,118, 92, 94,121,122, 3,124,103, 2, 1, + 0,129,130,131,120,119,126,125,136,137,138,139,140,141,142,134, + 135,132,133,104, 64,101, 62, 57,102, 95, 93, 59, 61, 28, 97, 96, + 52, 49, 48, 29, 32, 25, 24, 46, 23, 98, 45, 44, 43, 20, 42, 41, + 19, 18, 99, 40, 15, 39, 38, 16, 13, 12, 11, 37, 10, 9, 8, 36, + 7,128,127,105,123,116, 35, 34, 33,145, 31, 79, 42,146, 78, 26, + 83, 48, 49, 50, 44, 47, 26, 31, 30, 18, 17, 19, 21, 24, 25, 13, + 14, 16, 17, 18, 20, 21, 12, 14, 15, 9, 10, 6, 9, 6, 5, 8, + 6, 12, 8, 10, 7, 9, 6, 4, 6, 2, 2, 3, 3, 3, 3, 2, +}; + +static int read_len_table(uint8_t *dst, GetBitContext *gb) +{ + int i, val, repeat; + + for (i = 0; i < 256;) { + repeat = get_bits(gb, 3); + val = get_bits(gb, 5); + if (repeat == 0) + repeat = get_bits(gb, 8); + if (i + repeat > 256 || get_bits_left(gb) < 0) { + av_log(NULL, AV_LOG_ERROR, "Error reading huffman table\n"); + return -1; + } + while (repeat--) + dst[i++] = val; + } + return 0; +} + +static void generate_joint_tables(HYuvContext *s) +{ + uint16_t symbols[1 << VLC_BITS]; + uint16_t bits[1 << VLC_BITS]; + uint8_t len[1 << VLC_BITS]; + if (s->bitstream_bpp < 24) { + int p, i, y, u; + for (p = 0; p < 3; p++) { + for (i = y = 0; y < 256; y++) { + int len0 = s->len[0][y]; + int limit = VLC_BITS - len0; + if(limit <= 0) + continue; + for (u = 0; u < 256; u++) { + int len1 = s->len[p][u]; + if (len1 > limit) + continue; + len[i] = len0 + len1; + bits[i] = (s->bits[0][y] << len1) + s->bits[p][u]; + symbols[i] = (y << 8) + u; + if(symbols[i] != 0xffff) // reserved to mean "invalid" + i++; + } + } + ff_free_vlc(&s->vlc[3 + p]); + ff_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 because 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++; + } + } + } + ff_free_vlc(&s->vlc[3]); + init_vlc(&s->vlc[3], VLC_BITS, i, len, 1, 1, bits, 2, 2, 0); + } +} + +static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length) +{ + GetBitContext gb; + int i; + + init_get_bits(&gb, src, length * 8); + + for (i = 0; i < 3; i++) { + if (read_len_table(s->len[i], &gb) < 0) + return -1; + if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0) { + return -1; + } + ff_free_vlc(&s->vlc[i]); + init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, + s->bits[i], 4, 4, 0); + } + + generate_joint_tables(s); + + return (get_bits_count(&gb) + 7) / 8; +} + +static int read_old_huffman_tables(HYuvContext *s) +{ + GetBitContext gb; + int i; + + init_get_bits(&gb, classic_shift_luma, + classic_shift_luma_table_size * 8); + if (read_len_table(s->len[0], &gb) < 0) + return -1; + + init_get_bits(&gb, classic_shift_chroma, + classic_shift_chroma_table_size * 8); + if (read_len_table(s->len[1], &gb) < 0) + return -1; + + for(i=0; i<256; i++) s->bits[0][i] = classic_add_luma [i]; + for(i=0; i<256; i++) s->bits[1][i] = classic_add_chroma[i]; + + if (s->bitstream_bpp >= 24) { + memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t)); + memcpy(s->len[1] , s->len [0], 256 * sizeof(uint8_t)); + } + memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t)); + memcpy(s->len[2] , s->len [1], 256 * sizeof(uint8_t)); + + for (i = 0; i < 3; i++) { + ff_free_vlc(&s->vlc[i]); + init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, + s->bits[i], 4, 4, 0); + } + + generate_joint_tables(s); + + return 0; +} + +static av_cold int decode_init(AVCodecContext *avctx) +{ + HYuvContext *s = avctx->priv_data; + + ff_huffyuv_common_init(avctx); + memset(s->vlc, 0, 3 * sizeof(VLC)); + + avctx->coded_frame = &s->picture; + s->interlaced = s->height > 288; + + s->bgr32 = 1; + + if (avctx->extradata_size) { + if ((avctx->bits_per_coded_sample & 7) && + avctx->bits_per_coded_sample != 12) + s->version = 1; // do such files exist at all? + else + s->version = 2; + } else + s->version = 0; + + if (s->version == 2) { + int method, interlace; + + if (avctx->extradata_size < 4) + return -1; + + method = ((uint8_t*)avctx->extradata)[0]; + s->decorrelate = method & 64 ? 1 : 0; + s->predictor = method & 63; + s->bitstream_bpp = ((uint8_t*)avctx->extradata)[1]; + if (s->bitstream_bpp == 0) + s->bitstream_bpp = avctx->bits_per_coded_sample & ~7; + interlace = (((uint8_t*)avctx->extradata)[2] & 0x30) >> 4; + s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced; + s->context = ((uint8_t*)avctx->extradata)[2] & 0x40 ? 1 : 0; + + if ( read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4, + avctx->extradata_size - 4) < 0) + return -1; + }else{ + switch (avctx->bits_per_coded_sample & 7) { + case 1: + s->predictor = LEFT; + s->decorrelate = 0; + break; + case 2: + s->predictor = LEFT; + s->decorrelate = 1; + break; + case 3: + s->predictor = PLANE; + s->decorrelate = avctx->bits_per_coded_sample >= 24; + break; + case 4: + s->predictor = MEDIAN; + s->decorrelate = 0; + break; + default: + s->predictor = LEFT; //OLD + s->decorrelate = 0; + break; + } + s->bitstream_bpp = avctx->bits_per_coded_sample & ~7; + s->context = 0; + + if (read_old_huffman_tables(s) < 0) + return -1; + } + + switch (s->bitstream_bpp) { + case 12: + avctx->pix_fmt = AV_PIX_FMT_YUV420P; + break; + case 16: + if (s->yuy2) { + avctx->pix_fmt = AV_PIX_FMT_YUYV422; + } else { + avctx->pix_fmt = AV_PIX_FMT_YUV422P; + } + break; + case 24: + case 32: + if (s->bgr32) { + avctx->pix_fmt = AV_PIX_FMT_RGB32; + } else { + avctx->pix_fmt = AV_PIX_FMT_BGR24; + } + break; + default: + return AVERROR_INVALIDDATA; + } + + ff_huffyuv_alloc_temp(s); + + return 0; +} + +static av_cold int decode_init_thread_copy(AVCodecContext *avctx) +{ + HYuvContext *s = avctx->priv_data; + int i; + + avctx->coded_frame= &s->picture; + ff_huffyuv_alloc_temp(s); + + for (i = 0; i < 6; i++) + s->vlc[i].table = NULL; + + if (s->version == 2) { + if (read_huffman_tables(s, ((uint8_t*)avctx->extradata) + 4, + avctx->extradata_size) < 0) + return -1; + } else { + if (read_old_huffman_tables(s) < 0) + return -1; + } + + return 0; +} + +/* TODO instead of restarting the read when the code isn't in the first level + * of the joint table, jump into the 2nd level of the individual table. */ +#define READ_2PIX(dst0, dst1, plane1){\ + uint16_t code = get_vlc2(&s->gb, s->vlc[3+plane1].table, VLC_BITS, 1);\ + if(code != 0xffff){\ + dst0 = code>>8;\ + dst1 = code;\ + }else{\ + dst0 = get_vlc2(&s->gb, s->vlc[0].table, VLC_BITS, 3);\ + dst1 = get_vlc2(&s->gb, s->vlc[plane1].table, VLC_BITS, 3);\ + }\ +} + +static void decode_422_bitstream(HYuvContext *s, int count) +{ + int i; + + count /= 2; + + if (count >= (get_bits_left(&s->gb)) / (31 * 4)) { + for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) { + READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1); + READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2); + } + } else { + for (i = 0; i < count; i++) { + READ_2PIX(s->temp[0][2 * i ], s->temp[1][i], 1); + READ_2PIX(s->temp[0][2 * i + 1], s->temp[2][i], 2); + } + } +} + +static void decode_gray_bitstream(HYuvContext *s, int count) +{ + int i; + + count/=2; + + if (count >= (get_bits_left(&s->gb)) / (31 * 2)) { + for (i = 0; i < count && get_bits_left(&s->gb) > 0; i++) { + READ_2PIX(s->temp[0][2 * i], s->temp[0][2 * i + 1], 0); + } + } else { + for(i=0; itemp[0][2 * i], s->temp[0][2 * i + 1], 0); + } + } +} + +static av_always_inline void decode_bgr_1(HYuvContext *s, int count, + int decorrelate, int alpha) +{ + int i; + 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 { + 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) + s->temp[0][4 * i + A] = 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) + decode_bgr_1(s, count, 0, 0); + else + decode_bgr_1(s, count, 0, 1); + } +} + +static void draw_slice(HYuvContext *s, int y) +{ + int h, cy, i; + int offset[AV_NUM_DATA_POINTERS]; + + if (s->avctx->draw_horiz_band==NULL) + return; + + h = y - s->last_slice_end; + y -= h; + + if (s->bitstream_bpp == 12) { + cy = y>>1; + } else { + cy = y; + } + + offset[0] = s->picture.linesize[0]*y; + offset[1] = s->picture.linesize[1]*cy; + offset[2] = s->picture.linesize[2]*cy; + for (i = 3; i < AV_NUM_DATA_POINTERS; i++) + offset[i] = 0; + emms_c(); + + s->avctx->draw_horiz_band(s->avctx, &s->picture, offset, y, 3, h); + + s->last_slice_end = y + h; +} + +static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, + AVPacket *avpkt) +{ + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + HYuvContext *s = avctx->priv_data; + const int width = s->width; + const int width2 = s->width>>1; + const int height = s->height; + int fake_ystride, fake_ustride, fake_vstride; + AVFrame * const p = &s->picture; + int table_size = 0; + + AVFrame *picture = data; + + av_fast_malloc(&s->bitstream_buffer, + &s->bitstream_buffer_size, + buf_size + FF_INPUT_BUFFER_PADDING_SIZE); + if (!s->bitstream_buffer) + return AVERROR(ENOMEM); + + memset(s->bitstream_buffer + buf_size, 0, FF_INPUT_BUFFER_PADDING_SIZE); + s->dsp.bswap_buf((uint32_t*)s->bitstream_buffer, + (const uint32_t*)buf, buf_size / 4); + + if (p->data[0]) + ff_thread_release_buffer(avctx, p); + + p->reference = 0; + if (ff_thread_get_buffer(avctx, p) < 0) { + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return -1; + } + + if (s->context) { + table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size); + if (table_size < 0) + return -1; + } + + if ((unsigned)(buf_size-table_size) >= INT_MAX / 8) + return -1; + + init_get_bits(&s->gb, s->bitstream_buffer+table_size, + (buf_size-table_size) * 8); + + fake_ystride = s->interlaced ? p->linesize[0] * 2 : p->linesize[0]; + fake_ustride = s->interlaced ? p->linesize[1] * 2 : p->linesize[1]; + fake_vstride = s->interlaced ? p->linesize[2] * 2 : p->linesize[2]; + + s->last_slice_end = 0; + + if (s->bitstream_bpp < 24) { + int y, cy; + int lefty, leftu, leftv; + int lefttopy, lefttopu, lefttopv; + + if (s->yuy2) { + p->data[0][3] = get_bits(&s->gb, 8); + p->data[0][2] = get_bits(&s->gb, 8); + p->data[0][1] = get_bits(&s->gb, 8); + p->data[0][0] = get_bits(&s->gb, 8); + + av_log(avctx, AV_LOG_ERROR, + "YUY2 output is not implemented yet\n"); + return -1; + } else { + + leftv = p->data[2][0] = get_bits(&s->gb, 8); + lefty = p->data[0][1] = get_bits(&s->gb, 8); + leftu = p->data[1][0] = get_bits(&s->gb, 8); + p->data[0][0] = get_bits(&s->gb, 8); + + switch (s->predictor) { + case LEFT: + case PLANE: + decode_422_bitstream(s, width-2); + lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width-2, lefty); + if (!(s->flags&CODEC_FLAG_GRAY)) { + leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2 - 1, leftu); + leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2 - 1, leftv); + } + + for (cy = y = 1; y < s->height; y++, cy++) { + uint8_t *ydst, *udst, *vdst; + + if (s->bitstream_bpp == 12) { + decode_gray_bitstream(s, width); + + ydst = p->data[0] + p->linesize[0] * y; + + lefty = s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty); + if (s->predictor == PLANE) { + if (y > s->interlaced) + s->dsp.add_bytes(ydst, ydst - fake_ystride, width); + } + y++; + if (y >= s->height) break; + } + + draw_slice(s, y); + + ydst = p->data[0] + p->linesize[0]*y; + udst = p->data[1] + p->linesize[1]*cy; + vdst = p->data[2] + p->linesize[2]*cy; + + decode_422_bitstream(s, width); + lefty = s->dsp.add_hfyu_left_prediction(ydst, s->temp[0], width, lefty); + if (!(s->flags & CODEC_FLAG_GRAY)) { + leftu= s->dsp.add_hfyu_left_prediction(udst, s->temp[1], width2, leftu); + leftv= s->dsp.add_hfyu_left_prediction(vdst, s->temp[2], width2, leftv); + } + if (s->predictor == PLANE) { + if (cy > s->interlaced) { + s->dsp.add_bytes(ydst, ydst - fake_ystride, width); + if (!(s->flags & CODEC_FLAG_GRAY)) { + s->dsp.add_bytes(udst, udst - fake_ustride, width2); + s->dsp.add_bytes(vdst, vdst - fake_vstride, width2); + } + } + } + } + draw_slice(s, height); + + break; + case MEDIAN: + /* first line except first 2 pixels is left predicted */ + decode_422_bitstream(s, width - 2); + lefty= s->dsp.add_hfyu_left_prediction(p->data[0] + 2, s->temp[0], width - 2, lefty); + if (!(s->flags & CODEC_FLAG_GRAY)) { + leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + 1, s->temp[1], width2 - 1, leftu); + leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + 1, s->temp[2], width2 - 1, leftv); + } + + cy = y = 1; + + /* second line is left predicted for interlaced case */ + if (s->interlaced) { + decode_422_bitstream(s, width); + lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + p->linesize[0], s->temp[0], width, lefty); + if (!(s->flags & CODEC_FLAG_GRAY)) { + leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + p->linesize[2], s->temp[1], width2, leftu); + leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + p->linesize[1], s->temp[2], width2, leftv); + } + y++; cy++; + } + + /* next 4 pixels are left predicted too */ + decode_422_bitstream(s, 4); + lefty = s->dsp.add_hfyu_left_prediction(p->data[0] + fake_ystride, s->temp[0], 4, lefty); + if (!(s->flags&CODEC_FLAG_GRAY)) { + leftu = s->dsp.add_hfyu_left_prediction(p->data[1] + fake_ustride, s->temp[1], 2, leftu); + leftv = s->dsp.add_hfyu_left_prediction(p->data[2] + fake_vstride, s->temp[2], 2, leftv); + } + + /* next line except the first 4 pixels is median predicted */ + lefttopy = p->data[0][3]; + decode_422_bitstream(s, width - 4); + s->dsp.add_hfyu_median_prediction(p->data[0] + fake_ystride+4, p->data[0]+4, s->temp[0], width-4, &lefty, &lefttopy); + if (!(s->flags&CODEC_FLAG_GRAY)) { + lefttopu = p->data[1][1]; + lefttopv = p->data[2][1]; + s->dsp.add_hfyu_median_prediction(p->data[1] + fake_ustride+2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu); + s->dsp.add_hfyu_median_prediction(p->data[2] + fake_vstride+2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv); + } + y++; cy++; + + for (; ybitstream_bpp == 12) { + while (2 * cy > y) { + decode_gray_bitstream(s, width); + ydst = p->data[0] + p->linesize[0] * y; + s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy); + y++; + } + if (y >= height) break; + } + draw_slice(s, y); + + decode_422_bitstream(s, width); + + ydst = p->data[0] + p->linesize[0] * y; + udst = p->data[1] + p->linesize[1] * cy; + vdst = p->data[2] + p->linesize[2] * cy; + + s->dsp.add_hfyu_median_prediction(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy); + if (!(s->flags & CODEC_FLAG_GRAY)) { + s->dsp.add_hfyu_median_prediction(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu); + s->dsp.add_hfyu_median_prediction(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv); + } + } + + draw_slice(s, height); + break; + } + } + } else { + int y; + int leftr, leftg, leftb, lefta; + const int last_line = (height - 1) * p->linesize[0]; + + if (s->bitstream_bpp == 32) { + lefta = p->data[0][last_line+A] = get_bits(&s->gb, 8); + leftr = p->data[0][last_line+R] = get_bits(&s->gb, 8); + leftg = p->data[0][last_line+G] = get_bits(&s->gb, 8); + leftb = p->data[0][last_line+B] = get_bits(&s->gb, 8); + } else { + leftr = p->data[0][last_line+R] = get_bits(&s->gb, 8); + leftg = p->data[0][last_line+G] = get_bits(&s->gb, 8); + leftb = p->data[0][last_line+B] = get_bits(&s->gb, 8); + lefta = p->data[0][last_line+A] = 255; + skip_bits(&s->gb, 8); + } + + if (s->bgr32) { + switch (s->predictor) { + case LEFT: + case PLANE: + decode_bgr_bitstream(s, width - 1); + s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + last_line+4, s->temp[0], width - 1, &leftr, &leftg, &leftb, &lefta); + + for (y = s->height - 2; y >= 0; y--) { //Yes it is stored upside down. + decode_bgr_bitstream(s, width); + + s->dsp.add_hfyu_left_prediction_bgr32(p->data[0] + p->linesize[0]*y, s->temp[0], width, &leftr, &leftg, &leftb, &lefta); + if (s->predictor == PLANE) { + if (s->bitstream_bpp != 32) lefta = 0; + if ((y & s->interlaced) == 0 && + y < s->height - 1 - s->interlaced) { + s->dsp.add_bytes(p->data[0] + p->linesize[0] * y, + p->data[0] + p->linesize[0] * y + + fake_ystride, fake_ystride); + } + } + } + // just 1 large slice as this is not possible in reverse order + draw_slice(s, height); + break; + default: + av_log(avctx, AV_LOG_ERROR, + "prediction type not supported!\n"); + } + }else{ + av_log(avctx, AV_LOG_ERROR, + "BGR24 output is not implemented yet\n"); + return -1; + } + } + emms_c(); + + *picture = *p; + *got_frame = 1; + + return (get_bits_count(&s->gb) + 31) / 32 * 4 + table_size; +} + +static av_cold int decode_end(AVCodecContext *avctx) +{ + HYuvContext *s = avctx->priv_data; + int i; + + if (s->picture.data[0]) + avctx->release_buffer(avctx, &s->picture); + + ff_huffyuv_common_end(s); + av_freep(&s->bitstream_buffer); + + for (i = 0; i < 6; i++) { + ff_free_vlc(&s->vlc[i]); + } + + return 0; +} + +#if CONFIG_HUFFYUV_DECODER +AVCodec ff_huffyuv_decoder = { + .name = "huffyuv", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_HUFFYUV, + .priv_data_size = sizeof(HYuvContext), + .init = decode_init, + .close = decode_end, + .decode = decode_frame, + .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | + CODEC_CAP_FRAME_THREADS, + .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy), + .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"), +}; +#endif + +#if CONFIG_FFVHUFF_DECODER +AVCodec ff_ffvhuff_decoder = { + .name = "ffvhuff", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_FFVHUFF, + .priv_data_size = sizeof(HYuvContext), + .init = decode_init, + .close = decode_end, + .decode = decode_frame, + .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DRAW_HORIZ_BAND | + CODEC_CAP_FRAME_THREADS, + .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy), + .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"), +}; +#endif -- cgit v1.2.3