| /* |
| * RV10/RV20 decoder |
| * Copyright (c) 2000,2001 Fabrice Bellard |
| * Copyright (c) 2002-2004 Michael Niedermayer |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * RV10/RV20 decoder |
| */ |
| |
| #include <inttypes.h> |
| |
| #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_max; |
| |
| 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->low_delay && s->pict_type == AV_PICTURE_TYPE_B) { |
| av_log(s->avctx, AV_LOG_ERROR, "low delay B\n"); |
| return -1; |
| } |
| 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) && !s->avctx->lowres; |
| |
| 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_max = s->avctx->extradata[1] & 7; |
| if (rpr_max) { |
| int f, new_w, new_h; |
| int rpr_bits = av_log2(rpr_max) + 1; |
| |
| 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) { |
| AVRational old_aspect = s->avctx->sample_aspect_ratio; |
| av_log(s->avctx, AV_LOG_DEBUG, |
| "attempting to change resolution to %dx%d\n", new_w, new_h); |
| if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0) |
| return AVERROR_INVALIDDATA; |
| ff_mpv_common_end(s); |
| |
| // attempt to keep aspect during typical resolution switches |
| if (!old_aspect.num) |
| old_aspect = (AVRational){1, 1}; |
| if (2 * (int64_t)new_w * s->height == (int64_t)new_h * s->width) |
| s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){2, 1}); |
| if ((int64_t)new_w * s->height == 2 * (int64_t)new_h * s->width) |
| s->avctx->sample_aspect_ratio = av_mul_q(old_aspect, (AVRational){1, 2}); |
| |
| 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/%d\n", f, rpr_bits, rpr_max); |
| } |
| } |
| 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->pict_type == AV_PICTURE_TYPE_B) { |
| 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"); |
| #define ERROR_SKIP_FRAME -123 |
| return ERROR_SKIP_FRAME; |
| } |
| 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; |
| if (!s->avctx->lowres) |
| 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); |
| } |
| |
| av_assert0(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); |
| ff_mpv_decode_init(s, avctx); |
| |
| s->out_format = FMT_H263; |
| |
| 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:%"PRIX32"\n", rv->sub_id, |
| ((uint32_t *) avctx->extradata)[0]); |
| } |
| |
| 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) { |
| if (mb_count != ERROR_SKIP_FRAME) |
| 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_tlog(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 && active_bits_size >= get_bits_count(&s->gb)) { |
| 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_reconstruct_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, pict); |
| ff_mpv_export_qp_table(s, pict, s->current_picture_ptr, FF_QSCALE_TYPE_MPEG1); |
| } 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, pict); |
| ff_mpv_export_qp_table(s, pict,s->last_picture_ptr, FF_QSCALE_TYPE_MPEG1); |
| } |
| |
| 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, |
| .max_lowres = 3, |
| .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, |
| .max_lowres = 3, |
| .pix_fmts = (const enum AVPixelFormat[]) { |
| AV_PIX_FMT_YUV420P, |
| AV_PIX_FMT_NONE |
| }, |
| }; |
