/* * huffyuv decoder * * Copyright (c) 2002-2003 Michael Niedermayer <michaelni@gmx.at> * * 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 "get_bits.h" #include "huffyuv.h" #include "huffyuvdsp.h" #include "thread.h" #define classic_shift_luma_table_size 42 static const unsigned char classic_shift_luma[classic_shift_luma_table_size + AV_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 + AV_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 AVERROR_INVALIDDATA; } while (repeat--) dst[i++] = val; } return 0; } static int generate_joint_tables(HYuvContext *s) { uint16_t symbols[1 << VLC_BITS]; uint16_t bits[1 << VLC_BITS]; uint8_t len[1 << VLC_BITS]; int ret; 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]); if ((ret = ff_init_vlc_sparse(&s->vlc[3 + p], VLC_BITS, i, len, 1, 1, bits, 2, 2, symbols, 2, 2, 0)) < 0) return ret; } } 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 * does not 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]); if ((ret = init_vlc(&s->vlc[3], VLC_BITS, i, len, 1, 1, bits, 2, 2, 0)) < 0) return ret; } return 0; } static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length) { GetBitContext gb; int i, ret; if ((ret = init_get_bits(&gb, src, length * 8)) < 0) return ret; for (i = 0; i < 3; i++) { if ((ret = read_len_table(s->len[i], &gb)) < 0) return ret; if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i])) < 0) return ret; ff_free_vlc(&s->vlc[i]); if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, s->bits[i], 4, 4, 0)) < 0) return ret; } if ((ret = generate_joint_tables(s)) < 0) return ret; return (get_bits_count(&gb) + 7) / 8; } static int read_old_huffman_tables(HYuvContext *s) { GetBitContext gb; int i, ret; if ((ret = init_get_bits(&gb, classic_shift_luma, classic_shift_luma_table_size * 8)) < 0) return ret; if ((ret = read_len_table(s->len[0], &gb)) < 0) return ret; if ((ret = init_get_bits(&gb, classic_shift_chroma, classic_shift_chroma_table_size * 8)) < 0) return ret; if ((ret = read_len_table(s->len[1], &gb)) < 0) return ret; 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]); if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, s->bits[i], 4, 4, 0)) < 0) return ret; } if ((ret = generate_joint_tables(s)) < 0) return ret; return 0; } static av_cold int decode_init(AVCodecContext *avctx) { HYuvContext *s = avctx->priv_data; int ret; ff_huffyuv_common_init(avctx); ff_huffyuvdsp_init(&s->hdsp); memset(s->vlc, 0, 3 * sizeof(VLC)); 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 AVERROR_INVALIDDATA; method = avctx->extradata[0]; s->decorrelate = method & 64 ? 1 : 0; s->predictor = method & 63; s->bitstream_bpp = avctx->extradata[1]; if (s->bitstream_bpp == 0) s->bitstream_bpp = avctx->bits_per_coded_sample & ~7; interlace = (avctx->extradata[2] & 0x30) >> 4; s->interlaced = (interlace == 1) ? 1 : (interlace == 2) ? 0 : s->interlaced; s->context = avctx->extradata[2] & 0x40 ? 1 : 0; if ((ret = read_huffman_tables(s, avctx->extradata + 4, avctx->extradata_size - 4)) < 0) return ret; } 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 ((ret = read_old_huffman_tables(s)) < 0) return ret; } 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; } if (s->predictor == MEDIAN && avctx->pix_fmt == AV_PIX_FMT_YUV422P && avctx->width % 4) { av_log(avctx, AV_LOG_ERROR, "width must be multiple of 4 " "for this combination of colorspace and predictor type.\n"); return AVERROR_INVALIDDATA; } if ((ret = ff_huffyuv_alloc_temp(s)) < 0) return ret; return 0; } static av_cold int decode_init_thread_copy(AVCodecContext *avctx) { HYuvContext *s = avctx->priv_data; int i, ret; if ((ret = ff_huffyuv_alloc_temp(s)) < 0) return ret; for (i = 0; i < 6; i++) s->vlc[i].table = NULL; if (s->version == 2) { if ((ret = read_huffman_tables(s, avctx->extradata + 4, avctx->extradata_size)) < 0) return ret; } else { if ((ret = read_old_huffman_tables(s)) < 0) return ret; } 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; i < count; i++) { READ_2PIX(s->temp[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, AVFrame *frame, int y) { int h, cy, i; int offset[AV_NUM_DATA_POINTERS]; if (!s->avctx->draw_horiz_band) return; h = y - s->last_slice_end; y -= h; if (s->bitstream_bpp == 12) cy = y >> 1; else cy = y; offset[0] = frame->linesize[0] * y; offset[1] = frame->linesize[1] * cy; offset[2] = frame->linesize[2] * cy; for (i = 3; i < AV_NUM_DATA_POINTERS; i++) offset[i] = 0; emms_c(); s->avctx->draw_horiz_band(s->avctx, frame, 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; ThreadFrame frame = { .f = data }; AVFrame *const p = data; int table_size = 0, ret; av_fast_malloc(&s->bitstream_buffer, &s->bitstream_buffer_size, buf_size + AV_INPUT_BUFFER_PADDING_SIZE); if (!s->bitstream_buffer) return AVERROR(ENOMEM); memset(s->bitstream_buffer + buf_size, 0, AV_INPUT_BUFFER_PADDING_SIZE); s->bdsp.bswap_buf((uint32_t *) s->bitstream_buffer, (const uint32_t *) buf, buf_size / 4); if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0) { av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); return ret; } if (s->context) { table_size = read_huffman_tables(s, s->bitstream_buffer, buf_size); if (table_size < 0) return table_size; } if ((unsigned) (buf_size - table_size) >= INT_MAX / 8) return AVERROR_INVALIDDATA; if ((ret = init_get_bits(&s->gb, s->bitstream_buffer + table_size, (buf_size - table_size) * 8)) < 0) return ret; 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); avpriv_report_missing_feature(avctx, "YUY2 output"); return AVERROR_PATCHWELCOME; } 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->hdsp.add_hfyu_left_pred(p->data[0] + 2, s->temp[0], width - 2, lefty); if (!(s->flags & AV_CODEC_FLAG_GRAY)) { leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu); leftv = s->hdsp.add_hfyu_left_pred(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->hdsp.add_hfyu_left_pred(ydst, s->temp[0], width, lefty); if (s->predictor == PLANE) { if (y > s->interlaced) s->hdsp.add_bytes(ydst, ydst - fake_ystride, width); } y++; if (y >= s->height) break; } draw_slice(s, p, 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->hdsp.add_hfyu_left_pred(ydst, s->temp[0], width, lefty); if (!(s->flags & AV_CODEC_FLAG_GRAY)) { leftu = s->hdsp.add_hfyu_left_pred(udst, s->temp[1], width2, leftu); leftv = s->hdsp.add_hfyu_left_pred(vdst, s->temp[2], width2, leftv); } if (s->predictor == PLANE) { if (cy > s->interlaced) { s->hdsp.add_bytes(ydst, ydst - fake_ystride, width); if (!(s->flags & AV_CODEC_FLAG_GRAY)) { s->hdsp.add_bytes(udst, udst - fake_ustride, width2); s->hdsp.add_bytes(vdst, vdst - fake_vstride, width2); } } } } draw_slice(s, p, height); break; case MEDIAN: /* first line except first 2 pixels is left predicted */ decode_422_bitstream(s, width - 2); lefty = s->hdsp.add_hfyu_left_pred(p->data[0] + 2, s->temp[0], width - 2, lefty); if (!(s->flags & AV_CODEC_FLAG_GRAY)) { leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + 1, s->temp[1], width2 - 1, leftu); leftv = s->hdsp.add_hfyu_left_pred(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->hdsp.add_hfyu_left_pred(p->data[0] + p->linesize[0], s->temp[0], width, lefty); if (!(s->flags & AV_CODEC_FLAG_GRAY)) { leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + p->linesize[2], s->temp[1], width2, leftu); leftv = s->hdsp.add_hfyu_left_pred(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->hdsp.add_hfyu_left_pred(p->data[0] + fake_ystride, s->temp[0], 4, lefty); if (!(s->flags & AV_CODEC_FLAG_GRAY)) { leftu = s->hdsp.add_hfyu_left_pred(p->data[1] + fake_ustride, s->temp[1], 2, leftu); leftv = s->hdsp.add_hfyu_left_pred(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->hdsp.add_hfyu_median_pred(p->data[0] + fake_ystride + 4, p->data[0] + 4, s->temp[0], width - 4, &lefty, &lefttopy); if (!(s->flags & AV_CODEC_FLAG_GRAY)) { lefttopu = p->data[1][1]; lefttopv = p->data[2][1]; s->hdsp.add_hfyu_median_pred(p->data[1] + fake_ustride + 2, p->data[1] + 2, s->temp[1], width2 - 2, &leftu, &lefttopu); s->hdsp.add_hfyu_median_pred(p->data[2] + fake_vstride + 2, p->data[2] + 2, s->temp[2], width2 - 2, &leftv, &lefttopv); } y++; cy++; for (; y < height; y++, cy++) { uint8_t *ydst, *udst, *vdst; if (s->bitstream_bpp == 12) { while (2 * cy > y) { decode_gray_bitstream(s, width); ydst = p->data[0] + p->linesize[0] * y; s->hdsp.add_hfyu_median_pred(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy); y++; } if (y >= height) break; } draw_slice(s, p, 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->hdsp.add_hfyu_median_pred(ydst, ydst - fake_ystride, s->temp[0], width, &lefty, &lefttopy); if (!(s->flags & AV_CODEC_FLAG_GRAY)) { s->hdsp.add_hfyu_median_pred(udst, udst - fake_ustride, s->temp[1], width2, &leftu, &lefttopu); s->hdsp.add_hfyu_median_pred(vdst, vdst - fake_vstride, s->temp[2], width2, &leftv, &lefttopv); } } draw_slice(s, p, 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->hdsp.add_hfyu_left_pred_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->hdsp.add_hfyu_left_pred_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->hdsp.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, p, height); break; default: av_log(avctx, AV_LOG_ERROR, "prediction type not supported!\n"); } } else { avpriv_report_missing_feature(avctx, "BGR24 output"); return AVERROR_PATCHWELCOME; } } emms_c(); *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; ff_huffyuv_common_end(s); av_freep(&s->bitstream_buffer); for (i = 0; i < 6; i++) ff_free_vlc(&s->vlc[i]); return 0; } AVCodec ff_huffyuv_decoder = { .name = "huffyuv", .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / 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 = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_FRAME_THREADS, .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy), }; #if CONFIG_FFVHUFF_DECODER AVCodec ff_ffvhuff_decoder = { .name = "ffvhuff", .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_FFVHUFF, .priv_data_size = sizeof(HYuvContext), .init = decode_init, .close = decode_end, .decode = decode_frame, .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_FRAME_THREADS, .init_thread_copy = ONLY_IF_THREADS_ENABLED(decode_init_thread_copy), }; #endif /* CONFIG_FFVHUFF_DECODER */