/* * RV10/RV20 decoder * Copyright (c) 2000,2001 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer * * 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 * RV10/RV20 decoder */ #include #include "libavutil/imgutils.h" #include "avcodec.h" #include "error_resilience.h" #include "h263.h" #include "h263data.h" #include "internal.h" #include "mpeg_er.h" #include "mpegutils.h" #include "mpegvideo.h" #include "mpeg4video.h" #include "mpegvideodata.h" #include "rv10.h" #define RV_GET_MAJOR_VER(x) ((x) >> 28) #define RV_GET_MINOR_VER(x) (((x) >> 20) & 0xFF) #define RV_GET_MICRO_VER(x) (((x) >> 12) & 0xFF) #define DC_VLC_BITS 14 // FIXME find a better solution typedef struct RVDecContext { MpegEncContext m; int sub_id; int orig_width, orig_height; } RVDecContext; static const uint16_t rv_lum_code[256] = { 0x3e7f, 0x0f00, 0x0f01, 0x0f02, 0x0f03, 0x0f04, 0x0f05, 0x0f06, 0x0f07, 0x0f08, 0x0f09, 0x0f0a, 0x0f0b, 0x0f0c, 0x0f0d, 0x0f0e, 0x0f0f, 0x0f10, 0x0f11, 0x0f12, 0x0f13, 0x0f14, 0x0f15, 0x0f16, 0x0f17, 0x0f18, 0x0f19, 0x0f1a, 0x0f1b, 0x0f1c, 0x0f1d, 0x0f1e, 0x0f1f, 0x0f20, 0x0f21, 0x0f22, 0x0f23, 0x0f24, 0x0f25, 0x0f26, 0x0f27, 0x0f28, 0x0f29, 0x0f2a, 0x0f2b, 0x0f2c, 0x0f2d, 0x0f2e, 0x0f2f, 0x0f30, 0x0f31, 0x0f32, 0x0f33, 0x0f34, 0x0f35, 0x0f36, 0x0f37, 0x0f38, 0x0f39, 0x0f3a, 0x0f3b, 0x0f3c, 0x0f3d, 0x0f3e, 0x0f3f, 0x0380, 0x0381, 0x0382, 0x0383, 0x0384, 0x0385, 0x0386, 0x0387, 0x0388, 0x0389, 0x038a, 0x038b, 0x038c, 0x038d, 0x038e, 0x038f, 0x0390, 0x0391, 0x0392, 0x0393, 0x0394, 0x0395, 0x0396, 0x0397, 0x0398, 0x0399, 0x039a, 0x039b, 0x039c, 0x039d, 0x039e, 0x039f, 0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7, 0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf, 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0020, 0x0021, 0x0022, 0x0023, 0x000c, 0x000d, 0x0004, 0x0000, 0x0005, 0x000e, 0x000f, 0x0024, 0x0025, 0x0026, 0x0027, 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f, 0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7, 0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df, 0x03a0, 0x03a1, 0x03a2, 0x03a3, 0x03a4, 0x03a5, 0x03a6, 0x03a7, 0x03a8, 0x03a9, 0x03aa, 0x03ab, 0x03ac, 0x03ad, 0x03ae, 0x03af, 0x03b0, 0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5, 0x03b6, 0x03b7, 0x03b8, 0x03b9, 0x03ba, 0x03bb, 0x03bc, 0x03bd, 0x03be, 0x03bf, 0x0f40, 0x0f41, 0x0f42, 0x0f43, 0x0f44, 0x0f45, 0x0f46, 0x0f47, 0x0f48, 0x0f49, 0x0f4a, 0x0f4b, 0x0f4c, 0x0f4d, 0x0f4e, 0x0f4f, 0x0f50, 0x0f51, 0x0f52, 0x0f53, 0x0f54, 0x0f55, 0x0f56, 0x0f57, 0x0f58, 0x0f59, 0x0f5a, 0x0f5b, 0x0f5c, 0x0f5d, 0x0f5e, 0x0f5f, 0x0f60, 0x0f61, 0x0f62, 0x0f63, 0x0f64, 0x0f65, 0x0f66, 0x0f67, 0x0f68, 0x0f69, 0x0f6a, 0x0f6b, 0x0f6c, 0x0f6d, 0x0f6e, 0x0f6f, 0x0f70, 0x0f71, 0x0f72, 0x0f73, 0x0f74, 0x0f75, 0x0f76, 0x0f77, 0x0f78, 0x0f79, 0x0f7a, 0x0f7b, 0x0f7c, 0x0f7d, 0x0f7e, 0x0f7f, }; static const uint8_t rv_lum_bits[256] = { 14, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 2, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, }; static const uint16_t rv_chrom_code[256] = { 0xfe7f, 0x3f00, 0x3f01, 0x3f02, 0x3f03, 0x3f04, 0x3f05, 0x3f06, 0x3f07, 0x3f08, 0x3f09, 0x3f0a, 0x3f0b, 0x3f0c, 0x3f0d, 0x3f0e, 0x3f0f, 0x3f10, 0x3f11, 0x3f12, 0x3f13, 0x3f14, 0x3f15, 0x3f16, 0x3f17, 0x3f18, 0x3f19, 0x3f1a, 0x3f1b, 0x3f1c, 0x3f1d, 0x3f1e, 0x3f1f, 0x3f20, 0x3f21, 0x3f22, 0x3f23, 0x3f24, 0x3f25, 0x3f26, 0x3f27, 0x3f28, 0x3f29, 0x3f2a, 0x3f2b, 0x3f2c, 0x3f2d, 0x3f2e, 0x3f2f, 0x3f30, 0x3f31, 0x3f32, 0x3f33, 0x3f34, 0x3f35, 0x3f36, 0x3f37, 0x3f38, 0x3f39, 0x3f3a, 0x3f3b, 0x3f3c, 0x3f3d, 0x3f3e, 0x3f3f, 0x0f80, 0x0f81, 0x0f82, 0x0f83, 0x0f84, 0x0f85, 0x0f86, 0x0f87, 0x0f88, 0x0f89, 0x0f8a, 0x0f8b, 0x0f8c, 0x0f8d, 0x0f8e, 0x0f8f, 0x0f90, 0x0f91, 0x0f92, 0x0f93, 0x0f94, 0x0f95, 0x0f96, 0x0f97, 0x0f98, 0x0f99, 0x0f9a, 0x0f9b, 0x0f9c, 0x0f9d, 0x0f9e, 0x0f9f, 0x03c0, 0x03c1, 0x03c2, 0x03c3, 0x03c4, 0x03c5, 0x03c6, 0x03c7, 0x03c8, 0x03c9, 0x03ca, 0x03cb, 0x03cc, 0x03cd, 0x03ce, 0x03cf, 0x00e0, 0x00e1, 0x00e2, 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, 0x0030, 0x0031, 0x0032, 0x0033, 0x0008, 0x0009, 0x0002, 0x0000, 0x0003, 0x000a, 0x000b, 0x0034, 0x0035, 0x0036, 0x0037, 0x00e8, 0x00e9, 0x00ea, 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, 0x03d0, 0x03d1, 0x03d2, 0x03d3, 0x03d4, 0x03d5, 0x03d6, 0x03d7, 0x03d8, 0x03d9, 0x03da, 0x03db, 0x03dc, 0x03dd, 0x03de, 0x03df, 0x0fa0, 0x0fa1, 0x0fa2, 0x0fa3, 0x0fa4, 0x0fa5, 0x0fa6, 0x0fa7, 0x0fa8, 0x0fa9, 0x0faa, 0x0fab, 0x0fac, 0x0fad, 0x0fae, 0x0faf, 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7, 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf, 0x3f40, 0x3f41, 0x3f42, 0x3f43, 0x3f44, 0x3f45, 0x3f46, 0x3f47, 0x3f48, 0x3f49, 0x3f4a, 0x3f4b, 0x3f4c, 0x3f4d, 0x3f4e, 0x3f4f, 0x3f50, 0x3f51, 0x3f52, 0x3f53, 0x3f54, 0x3f55, 0x3f56, 0x3f57, 0x3f58, 0x3f59, 0x3f5a, 0x3f5b, 0x3f5c, 0x3f5d, 0x3f5e, 0x3f5f, 0x3f60, 0x3f61, 0x3f62, 0x3f63, 0x3f64, 0x3f65, 0x3f66, 0x3f67, 0x3f68, 0x3f69, 0x3f6a, 0x3f6b, 0x3f6c, 0x3f6d, 0x3f6e, 0x3f6f, 0x3f70, 0x3f71, 0x3f72, 0x3f73, 0x3f74, 0x3f75, 0x3f76, 0x3f77, 0x3f78, 0x3f79, 0x3f7a, 0x3f7b, 0x3f7c, 0x3f7d, 0x3f7e, 0x3f7f, }; static const uint8_t rv_chrom_bits[256] = { 16, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 4, 4, 3, 2, 3, 4, 4, 6, 6, 6, 6, 8, 8, 8, 8, 8, 8, 8, 8, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, }; static VLC rv_dc_lum, rv_dc_chrom; int ff_rv_decode_dc(MpegEncContext *s, int n) { int code; if (n < 4) { code = get_vlc2(&s->gb, rv_dc_lum.table, DC_VLC_BITS, 2); if (code < 0) { /* XXX: I don't understand why they use LONGER codes than * necessary. The following code would be completely useless * if they had thought about it !!! */ code = get_bits(&s->gb, 7); if (code == 0x7c) { code = (int8_t) (get_bits(&s->gb, 7) + 1); } else if (code == 0x7d) { code = -128 + get_bits(&s->gb, 7); } else if (code == 0x7e) { if (get_bits1(&s->gb) == 0) code = (int8_t) (get_bits(&s->gb, 8) + 1); else code = (int8_t) (get_bits(&s->gb, 8)); } else if (code == 0x7f) { skip_bits(&s->gb, 11); code = 1; } } else { code -= 128; } } else { code = get_vlc2(&s->gb, rv_dc_chrom.table, DC_VLC_BITS, 2); /* same remark */ if (code < 0) { code = get_bits(&s->gb, 9); if (code == 0x1fc) { code = (int8_t) (get_bits(&s->gb, 7) + 1); } else if (code == 0x1fd) { code = -128 + get_bits(&s->gb, 7); } else if (code == 0x1fe) { skip_bits(&s->gb, 9); code = 1; } else { av_log(s->avctx, AV_LOG_ERROR, "chroma dc error\n"); return 0xffff; } } else { code -= 128; } } return -code; } /* read RV 1.0 compatible frame header */ static int rv10_decode_picture_header(MpegEncContext *s) { int mb_count, pb_frame, marker, mb_xy; marker = get_bits1(&s->gb); if (get_bits1(&s->gb)) s->pict_type = AV_PICTURE_TYPE_P; else s->pict_type = AV_PICTURE_TYPE_I; if (!marker) av_log(s->avctx, AV_LOG_ERROR, "marker missing\n"); pb_frame = get_bits1(&s->gb); ff_dlog(s->avctx, "pict_type=%d pb_frame=%d\n", s->pict_type, pb_frame); if (pb_frame) { avpriv_request_sample(s->avctx, "PB-frame"); return AVERROR_PATCHWELCOME; } s->qscale = get_bits(&s->gb, 5); if (s->qscale == 0) { av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n"); return AVERROR_INVALIDDATA; } if (s->pict_type == AV_PICTURE_TYPE_I) { if (s->rv10_version == 3) { /* specific MPEG like DC coding not used */ s->last_dc[0] = get_bits(&s->gb, 8); s->last_dc[1] = get_bits(&s->gb, 8); s->last_dc[2] = get_bits(&s->gb, 8); ff_dlog(s->avctx, "DC:%d %d %d\n", s->last_dc[0], s->last_dc[1], s->last_dc[2]); } } /* if multiple packets per frame are sent, the position at which * to display the macroblocks is coded here */ mb_xy = s->mb_x + s->mb_y * s->mb_width; if (show_bits(&s->gb, 12) == 0 || (mb_xy && mb_xy < s->mb_num)) { s->mb_x = get_bits(&s->gb, 6); /* mb_x */ s->mb_y = get_bits(&s->gb, 6); /* mb_y */ mb_count = get_bits(&s->gb, 12); } else { s->mb_x = 0; s->mb_y = 0; mb_count = s->mb_width * s->mb_height; } skip_bits(&s->gb, 3); /* ignored */ s->f_code = 1; s->unrestricted_mv = 1; return mb_count; } static int rv20_decode_picture_header(RVDecContext *rv) { MpegEncContext *s = &rv->m; int seq, mb_pos, i, ret; int rpr_bits; i = get_bits(&s->gb, 2); switch (i) { case 0: s->pict_type = AV_PICTURE_TYPE_I; break; case 1: s->pict_type = AV_PICTURE_TYPE_I; break; // hmm ... case 2: s->pict_type = AV_PICTURE_TYPE_P; break; case 3: s->pict_type = AV_PICTURE_TYPE_B; break; default: av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n"); return AVERROR_INVALIDDATA; } if (!s->last_picture_ptr && s->pict_type == AV_PICTURE_TYPE_B) { av_log(s->avctx, AV_LOG_ERROR, "early B-frame\n"); return AVERROR_INVALIDDATA; } if (get_bits1(&s->gb)) { av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n"); return AVERROR_INVALIDDATA; } s->qscale = get_bits(&s->gb, 5); if (s->qscale == 0) { av_log(s->avctx, AV_LOG_ERROR, "Invalid qscale value: 0\n"); return AVERROR_INVALIDDATA; } if (RV_GET_MINOR_VER(rv->sub_id) >= 2) s->loop_filter = get_bits1(&s->gb); if (RV_GET_MINOR_VER(rv->sub_id) <= 1) seq = get_bits(&s->gb, 8) << 7; else seq = get_bits(&s->gb, 13) << 2; rpr_bits = s->avctx->extradata[1] & 7; if (rpr_bits) { int f, new_w, new_h; rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3); f = get_bits(&s->gb, rpr_bits); if (f) { if (s->avctx->extradata_size < 8 + 2 * f) { av_log(s->avctx, AV_LOG_ERROR, "Extradata too small.\n"); return AVERROR_INVALIDDATA; } new_w = 4 * ((uint8_t *) s->avctx->extradata)[6 + 2 * f]; new_h = 4 * ((uint8_t *) s->avctx->extradata)[7 + 2 * f]; } else { new_w = rv->orig_width; new_h = rv->orig_height; } if (new_w != s->width || new_h != s->height) { av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h); ff_mpv_common_end(s); ret = ff_set_dimensions(s->avctx, new_w, new_h); if (ret < 0) return ret; s->width = new_w; s->height = new_h; if ((ret = ff_mpv_common_init(s)) < 0) return ret; } if (s->avctx->debug & FF_DEBUG_PICT_INFO) { av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits); } } else if (av_image_check_size(s->width, s->height, 0, s->avctx) < 0) return AVERROR_INVALIDDATA; mb_pos = ff_h263_decode_mba(s); seq |= s->time & ~0x7FFF; if (seq - s->time > 0x4000) seq -= 0x8000; if (seq - s->time < -0x4000) seq += 0x8000; if (seq != s->time) { if (s->pict_type != AV_PICTURE_TYPE_B) { s->time = seq; s->pp_time = s->time - s->last_non_b_time; s->last_non_b_time = s->time; } else { s->time = seq; s->pb_time = s->pp_time - (s->last_non_b_time - s->time); if (s->pp_time <= s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time <= 0) { av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible " "from seeking? skipping current B-frame\n"); return FRAME_SKIPPED; } ff_mpeg4_init_direct_mv(s); } } s->no_rounding = get_bits1(&s->gb); if (RV_GET_MINOR_VER(rv->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B) // binary decoder reads 3+2 bits here but they don't seem to be used skip_bits(&s->gb, 5); s->f_code = 1; s->unrestricted_mv = 1; s->h263_aic = s->pict_type == AV_PICTURE_TYPE_I; s->modified_quant = 1; s->loop_filter = 1; if (s->avctx->debug & FF_DEBUG_PICT_INFO) { av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n", seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding); } assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay); return s->mb_width * s->mb_height - mb_pos; } static av_cold int rv10_decode_init(AVCodecContext *avctx) { RVDecContext *rv = avctx->priv_data; MpegEncContext *s = &rv->m; static int done = 0; int major_ver, minor_ver, micro_ver, ret; if (avctx->extradata_size < 8) { av_log(avctx, AV_LOG_ERROR, "Extradata is too small.\n"); return AVERROR_INVALIDDATA; } if ((ret = av_image_check_size(avctx->coded_width, avctx->coded_height, 0, avctx)) < 0) return ret; ff_mpv_decode_defaults(s); s->avctx = avctx; s->out_format = FMT_H263; s->codec_id = avctx->codec_id; rv->orig_width = s->width = avctx->coded_width; rv->orig_height = s->height = avctx->coded_height; s->h263_long_vectors = ((uint8_t *) avctx->extradata)[3] & 1; rv->sub_id = AV_RB32((uint8_t *) avctx->extradata + 4); major_ver = RV_GET_MAJOR_VER(rv->sub_id); minor_ver = RV_GET_MINOR_VER(rv->sub_id); micro_ver = RV_GET_MICRO_VER(rv->sub_id); s->low_delay = 1; switch (major_ver) { case 1: s->rv10_version = micro_ver ? 3 : 1; s->obmc = micro_ver == 2; break; case 2: if (minor_ver >= 2) { s->low_delay = 0; s->avctx->has_b_frames = 1; } break; default: av_log(s->avctx, AV_LOG_ERROR, "unknown header %X\n", rv->sub_id); avpriv_request_sample(avctx, "RV1/2 version"); return AVERROR_PATCHWELCOME; } if (avctx->debug & FF_DEBUG_PICT_INFO) { av_log(avctx, AV_LOG_DEBUG, "ver:%X ver0:%X\n", rv->sub_id, avctx->extradata_size >= 4 ? ((int *) avctx->extradata)[0] : -1); } avctx->pix_fmt = AV_PIX_FMT_YUV420P; ff_mpv_idct_init(s); if ((ret = ff_mpv_common_init(s)) < 0) return ret; ff_h263dsp_init(&s->h263dsp); ff_h263_decode_init_vlc(); /* init rv vlc */ if (!done) { INIT_VLC_STATIC(&rv_dc_lum, DC_VLC_BITS, 256, rv_lum_bits, 1, 1, rv_lum_code, 2, 2, 16384); INIT_VLC_STATIC(&rv_dc_chrom, DC_VLC_BITS, 256, rv_chrom_bits, 1, 1, rv_chrom_code, 2, 2, 16388); done = 1; } return 0; } static av_cold int rv10_decode_end(AVCodecContext *avctx) { MpegEncContext *s = avctx->priv_data; ff_mpv_common_end(s); return 0; } static int rv10_decode_packet(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int buf_size2) { RVDecContext *rv = avctx->priv_data; MpegEncContext *s = &rv->m; int mb_count, mb_pos, left, start_mb_x, active_bits_size, ret; active_bits_size = buf_size * 8; init_get_bits(&s->gb, buf, FFMAX(buf_size, buf_size2) * 8); if (s->codec_id == AV_CODEC_ID_RV10) mb_count = rv10_decode_picture_header(s); else mb_count = rv20_decode_picture_header(rv); if (mb_count < 0) { av_log(s->avctx, AV_LOG_ERROR, "HEADER ERROR\n"); return AVERROR_INVALIDDATA; } if (s->mb_x >= s->mb_width || s->mb_y >= s->mb_height) { av_log(s->avctx, AV_LOG_ERROR, "POS ERROR %d %d\n", s->mb_x, s->mb_y); return AVERROR_INVALIDDATA; } mb_pos = s->mb_y * s->mb_width + s->mb_x; left = s->mb_width * s->mb_height - mb_pos; if (mb_count > left) { av_log(s->avctx, AV_LOG_ERROR, "COUNT ERROR\n"); return AVERROR_INVALIDDATA; } if ((s->mb_x == 0 && s->mb_y == 0) || !s->current_picture_ptr) { // FIXME write parser so we always have complete frames? if (s->current_picture_ptr) { ff_er_frame_end(&s->er); ff_mpv_frame_end(s); s->mb_x = s->mb_y = s->resync_mb_x = s->resync_mb_y = 0; } if ((ret = ff_mpv_frame_start(s, avctx)) < 0) return ret; ff_mpeg_er_frame_start(s); } else { if (s->current_picture_ptr->f->pict_type != s->pict_type) { av_log(s->avctx, AV_LOG_ERROR, "Slice type mismatch\n"); return AVERROR_INVALIDDATA; } } ff_dlog(avctx, "qscale=%d\n", s->qscale); /* default quantization values */ if (s->codec_id == AV_CODEC_ID_RV10) { if (s->mb_y == 0) s->first_slice_line = 1; } else { s->first_slice_line = 1; s->resync_mb_x = s->mb_x; } start_mb_x = s->mb_x; s->resync_mb_y = s->mb_y; if (s->h263_aic) { s->y_dc_scale_table = s->c_dc_scale_table = ff_aic_dc_scale_table; } else { s->y_dc_scale_table = s->c_dc_scale_table = ff_mpeg1_dc_scale_table; } if (s->modified_quant) s->chroma_qscale_table = ff_h263_chroma_qscale_table; ff_set_qscale(s, s->qscale); s->rv10_first_dc_coded[0] = 0; s->rv10_first_dc_coded[1] = 0; s->rv10_first_dc_coded[2] = 0; s->block_wrap[0] = s->block_wrap[1] = s->block_wrap[2] = s->block_wrap[3] = s->b8_stride; s->block_wrap[4] = s->block_wrap[5] = s->mb_stride; ff_init_block_index(s); /* decode each macroblock */ for (s->mb_num_left = mb_count; s->mb_num_left > 0; s->mb_num_left--) { int ret; ff_update_block_index(s); ff_dlog(avctx, "**mb x=%d y=%d\n", s->mb_x, s->mb_y); s->mv_dir = MV_DIR_FORWARD; s->mv_type = MV_TYPE_16X16; ret = ff_h263_decode_mb(s, s->block); // Repeat the slice end check from ff_h263_decode_mb with our active // bitstream size if (ret != SLICE_ERROR) { int v = show_bits(&s->gb, 16); if (get_bits_count(&s->gb) + 16 > active_bits_size) v >>= get_bits_count(&s->gb) + 16 - active_bits_size; if (!v) ret = SLICE_END; } if (ret != SLICE_ERROR && active_bits_size < get_bits_count(&s->gb) && 8 * buf_size2 >= get_bits_count(&s->gb)) { active_bits_size = buf_size2 * 8; av_log(avctx, AV_LOG_DEBUG, "update size from %d to %d\n", 8 * buf_size, active_bits_size); ret = SLICE_OK; } if (ret == SLICE_ERROR || active_bits_size < get_bits_count(&s->gb)) { av_log(s->avctx, AV_LOG_ERROR, "ERROR at MB %d %d\n", s->mb_x, s->mb_y); return AVERROR_INVALIDDATA; } if (s->pict_type != AV_PICTURE_TYPE_B) ff_h263_update_motion_val(s); ff_mpv_decode_mb(s, s->block); if (s->loop_filter) ff_h263_loop_filter(s); if (++s->mb_x == s->mb_width) { s->mb_x = 0; s->mb_y++; ff_init_block_index(s); } if (s->mb_x == s->resync_mb_x) s->first_slice_line = 0; if (ret == SLICE_END) break; } ff_er_add_slice(&s->er, start_mb_x, s->resync_mb_y, s->mb_x - 1, s->mb_y, ER_MB_END); return active_bits_size; } static int get_slice_offset(AVCodecContext *avctx, const uint8_t *buf, int n) { if (avctx->slice_count) return avctx->slice_offset[n]; else return AV_RL32(buf + n * 8); } static int rv10_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; MpegEncContext *s = avctx->priv_data; AVFrame *pict = data; int i, ret; int slice_count; const uint8_t *slices_hdr = NULL; ff_dlog(avctx, "*****frame %d size=%d\n", avctx->frame_number, buf_size); /* no supplementary picture */ if (buf_size == 0) { return 0; } if (!avctx->slice_count) { slice_count = (*buf++) + 1; buf_size--; if (!slice_count || buf_size <= 8 * slice_count) { av_log(avctx, AV_LOG_ERROR, "Invalid slice count: %d.\n", slice_count); return AVERROR_INVALIDDATA; } slices_hdr = buf + 4; buf += 8 * slice_count; buf_size -= 8 * slice_count; } else slice_count = avctx->slice_count; for (i = 0; i < slice_count; i++) { unsigned offset = get_slice_offset(avctx, slices_hdr, i); int size, size2; if (offset >= buf_size) return AVERROR_INVALIDDATA; if (i + 1 == slice_count) size = buf_size - offset; else size = get_slice_offset(avctx, slices_hdr, i + 1) - offset; if (i + 2 >= slice_count) size2 = buf_size - offset; else size2 = get_slice_offset(avctx, slices_hdr, i + 2) - offset; if (size <= 0 || size2 <= 0 || offset + FFMAX(size, size2) > buf_size) return AVERROR_INVALIDDATA; if ((ret = rv10_decode_packet(avctx, buf + offset, size, size2)) < 0) return ret; if (ret > 8 * size) i++; } if (s->current_picture_ptr && s->mb_y >= s->mb_height) { ff_er_frame_end(&s->er); ff_mpv_frame_end(s); if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) { if ((ret = av_frame_ref(pict, s->current_picture_ptr->f)) < 0) return ret; ff_print_debug_info(s, s->current_picture_ptr); } else if (s->last_picture_ptr) { if ((ret = av_frame_ref(pict, s->last_picture_ptr->f)) < 0) return ret; ff_print_debug_info(s, s->last_picture_ptr); } if (s->last_picture_ptr || s->low_delay) { *got_frame = 1; } // so we can detect if frame_end was not called (find some nicer solution...) s->current_picture_ptr = NULL; } return avpkt->size; } AVCodec ff_rv10_decoder = { .name = "rv10", .long_name = NULL_IF_CONFIG_SMALL("RealVideo 1.0"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_RV10, .priv_data_size = sizeof(RVDecContext), .init = rv10_decode_init, .close = rv10_decode_end, .decode = rv10_decode_frame, .capabilities = AV_CODEC_CAP_DR1, .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, }; AVCodec ff_rv20_decoder = { .name = "rv20", .long_name = NULL_IF_CONFIG_SMALL("RealVideo 2.0"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_RV20, .priv_data_size = sizeof(RVDecContext), .init = rv10_decode_init, .close = rv10_decode_end, .decode = rv10_decode_frame, .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY, .flush = ff_mpeg_flush, .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, };