| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * H.263i decoder | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include "codec_internal.h" | ||
| 22 | #include "mpegvideo.h" | ||
| 23 | #include "mpegvideodec.h" | ||
| 24 | #include "h263data.h" | ||
| 25 | #include "h263dec.h" | ||
| 26 | |||
| 27 | /* don't understand why they choose a different header ! */ | ||
| 28 | ✗ | int ff_intel_h263_decode_picture_header(MpegEncContext *s) | |
| 29 | { | ||
| 30 | int format; | ||
| 31 | |||
| 32 | ✗ | if (get_bits_left(&s->gb) == 64) { /* special dummy frames */ | |
| 33 | ✗ | return FRAME_SKIPPED; | |
| 34 | } | ||
| 35 | |||
| 36 | /* picture header */ | ||
| 37 | ✗ | if (get_bits(&s->gb, 22) != 0x20) { | |
| 38 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Bad picture start code\n"); | |
| 39 | ✗ | return -1; | |
| 40 | } | ||
| 41 | ✗ | s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */ | |
| 42 | |||
| 43 | ✗ | if (check_marker(s->avctx, &s->gb, "after picture_number") != 1) { | |
| 44 | ✗ | return -1; /* marker */ | |
| 45 | } | ||
| 46 | ✗ | if (get_bits1(&s->gb) != 0) { | |
| 47 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Bad H.263 id\n"); | |
| 48 | ✗ | return -1; /* H.263 id */ | |
| 49 | } | ||
| 50 | ✗ | skip_bits1(&s->gb); /* split screen off */ | |
| 51 | ✗ | skip_bits1(&s->gb); /* camera off */ | |
| 52 | ✗ | skip_bits1(&s->gb); /* freeze picture release off */ | |
| 53 | |||
| 54 | ✗ | format = get_bits(&s->gb, 3); | |
| 55 | ✗ | if (format == 0 || format == 6) { | |
| 56 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Intel H.263 free format not supported\n"); | |
| 57 | ✗ | return -1; | |
| 58 | } | ||
| 59 | ✗ | s->h263_plus = 0; | |
| 60 | |||
| 61 | ✗ | s->pict_type = AV_PICTURE_TYPE_I + get_bits1(&s->gb); | |
| 62 | |||
| 63 | ✗ | s->h263_long_vectors = get_bits1(&s->gb); | |
| 64 | |||
| 65 | ✗ | if (get_bits1(&s->gb) != 0) { | |
| 66 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "SAC not supported\n"); | |
| 67 | ✗ | return -1; /* SAC: off */ | |
| 68 | } | ||
| 69 | ✗ | s->obmc= get_bits1(&s->gb); | |
| 70 | ✗ | s->pb_frame = get_bits1(&s->gb); | |
| 71 | |||
| 72 | ✗ | if (format < 6) { | |
| 73 | ✗ | s->width = ff_h263_format[format][0]; | |
| 74 | ✗ | s->height = ff_h263_format[format][1]; | |
| 75 | ✗ | s->avctx->sample_aspect_ratio.num = 12; | |
| 76 | ✗ | s->avctx->sample_aspect_ratio.den = 11; | |
| 77 | } else { | ||
| 78 | ✗ | format = get_bits(&s->gb, 3); | |
| 79 | ✗ | if(format == 0 || format == 7){ | |
| 80 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Wrong Intel H.263 format\n"); | |
| 81 | ✗ | return -1; | |
| 82 | } | ||
| 83 | ✗ | if(get_bits(&s->gb, 2)) | |
| 84 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n"); | |
| 85 | ✗ | s->loop_filter = get_bits1(&s->gb) * !s->avctx->lowres; | |
| 86 | ✗ | if(get_bits1(&s->gb)) | |
| 87 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n"); | |
| 88 | ✗ | if(get_bits1(&s->gb)) | |
| 89 | ✗ | s->pb_frame = 2; | |
| 90 | ✗ | if(get_bits(&s->gb, 5)) | |
| 91 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n"); | |
| 92 | ✗ | if(get_bits(&s->gb, 5) != 1) | |
| 93 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Invalid marker\n"); | |
| 94 | } | ||
| 95 | ✗ | if(format == 6){ | |
| 96 | ✗ | int ar = get_bits(&s->gb, 4); | |
| 97 | ✗ | skip_bits(&s->gb, 9); // display width | |
| 98 | ✗ | check_marker(s->avctx, &s->gb, "in dimensions"); | |
| 99 | ✗ | skip_bits(&s->gb, 9); // display height | |
| 100 | ✗ | if(ar == 15){ | |
| 101 | ✗ | s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 8); // aspect ratio - width | |
| 102 | ✗ | s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 8); // aspect ratio - height | |
| 103 | } else { | ||
| 104 | ✗ | s->avctx->sample_aspect_ratio = ff_h263_pixel_aspect[ar]; | |
| 105 | } | ||
| 106 | ✗ | if (s->avctx->sample_aspect_ratio.num == 0) | |
| 107 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Invalid aspect ratio.\n"); | |
| 108 | } | ||
| 109 | |||
| 110 | ✗ | s->chroma_qscale= s->qscale = get_bits(&s->gb, 5); | |
| 111 | ✗ | skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */ | |
| 112 | |||
| 113 | ✗ | if(s->pb_frame){ | |
| 114 | ✗ | skip_bits(&s->gb, 3); //temporal reference for B-frame | |
| 115 | ✗ | skip_bits(&s->gb, 2); //dbquant | |
| 116 | } | ||
| 117 | |||
| 118 | /* PEI */ | ||
| 119 | ✗ | if (skip_1stop_8data_bits(&s->gb) < 0) | |
| 120 | ✗ | return AVERROR_INVALIDDATA; | |
| 121 | |||
| 122 | ✗ | ff_h263_show_pict_info(s); | |
| 123 | |||
| 124 | ✗ | return 0; | |
| 125 | } | ||
| 126 | |||
| 127 | const FFCodec ff_h263i_decoder = { | ||
| 128 | .p.name = "h263i", | ||
| 129 | CODEC_LONG_NAME("Intel H.263"), | ||
| 130 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
| 131 | .p.id = AV_CODEC_ID_H263I, | ||
| 132 | .priv_data_size = sizeof(MpegEncContext), | ||
| 133 | .init = ff_h263_decode_init, | ||
| 134 | FF_CODEC_DECODE_CB(ff_h263_decode_frame), | ||
| 135 | .close = ff_mpv_decode_close, | ||
| 136 | .p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1, | ||
| 137 | .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | | ||
| 138 | FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM, | ||
| 139 | }; | ||
| 140 |