FFmpeg coverage

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 "mpegutils.h"
23			#include "mpegvideo.h"
24			#include "mpegvideodec.h"
25			#include "h263data.h"
26			#include "h263dec.h"
27			#include "mpegvideodata.h"
28
29			/* don't understand why they choose a different header ! */
30		✗	int ff_intel_h263_decode_picture_header(MpegEncContext *s)
31			{
32			int format;
33
34		✗	if (get_bits_left(&s->gb) == 64) { /* special dummy frames */
35		✗	return FRAME_SKIPPED;
36			}
37
38			/* picture header */
39		✗	if (get_bits(&s->gb, 22) != 0x20) {
40		✗	av_log(s->avctx, AV_LOG_ERROR, "Bad picture start code\n");
41		✗	return -1;
42			}
43		✗	s->picture_number = get_bits(&s->gb, 8); /* picture timestamp */
44
45		✗	if (check_marker(s->avctx, &s->gb, "after picture_number") != 1) {
46		✗	return -1; /* marker */
47			}
48		✗	if (get_bits1(&s->gb) != 0) {
49		✗	av_log(s->avctx, AV_LOG_ERROR, "Bad H.263 id\n");
50		✗	return -1; /* H.263 id */
51			}
52		✗	skip_bits1(&s->gb); /* split screen off */
53		✗	skip_bits1(&s->gb); /* camera off */
54		✗	skip_bits1(&s->gb); /* freeze picture release off */
55
56		✗	format = get_bits(&s->gb, 3);
57		✗	if (format == 0 || format == 6) {
58		✗	av_log(s->avctx, AV_LOG_ERROR, "Intel H.263 free format not supported\n");
59		✗	return -1;
60			}
61		✗	s->h263_plus = 0;
62
63		✗	s->pict_type = AV_PICTURE_TYPE_I + get_bits1(&s->gb);
64
65		✗	s->h263_long_vectors = get_bits1(&s->gb);
66
67		✗	if (get_bits1(&s->gb) != 0) {
68		✗	av_log(s->avctx, AV_LOG_ERROR, "SAC not supported\n");
69		✗	return -1; /* SAC: off */
70			}
71		✗	s->obmc= get_bits1(&s->gb);
72		✗	s->pb_frame = get_bits1(&s->gb);
73
74		✗	if (format < 6) {
75		✗	s->width = ff_h263_format[format][0];
76		✗	s->height = ff_h263_format[format][1];
77		✗	s->avctx->sample_aspect_ratio.num = 12;
78		✗	s->avctx->sample_aspect_ratio.den = 11;
79			} else {
80		✗	format = get_bits(&s->gb, 3);
81		✗	if(format == 0 || format == 7){
82		✗	av_log(s->avctx, AV_LOG_ERROR, "Wrong Intel H.263 format\n");
83		✗	return -1;
84			}
85		✗	if(get_bits(&s->gb, 2))
86		✗	av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
87		✗	s->loop_filter = get_bits1(&s->gb) * !s->avctx->lowres;
88		✗	if(get_bits1(&s->gb))
89		✗	av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
90		✗	if(get_bits1(&s->gb))
91		✗	s->pb_frame = 2;
92		✗	if(get_bits(&s->gb, 5))
93		✗	av_log(s->avctx, AV_LOG_ERROR, "Bad value for reserved field\n");
94		✗	if(get_bits(&s->gb, 5) != 1)
95		✗	av_log(s->avctx, AV_LOG_ERROR, "Invalid marker\n");
96			}
97		✗	if(format == 6){
98		✗	int ar = get_bits(&s->gb, 4);
99		✗	skip_bits(&s->gb, 9); // display width
100		✗	check_marker(s->avctx, &s->gb, "in dimensions");
101		✗	skip_bits(&s->gb, 9); // display height
102		✗	if(ar == 15){
103		✗	s->avctx->sample_aspect_ratio.num = get_bits(&s->gb, 8); // aspect ratio - width
104		✗	s->avctx->sample_aspect_ratio.den = get_bits(&s->gb, 8); // aspect ratio - height
105			} else {
106		✗	s->avctx->sample_aspect_ratio = ff_h263_pixel_aspect[ar];
107			}
108		✗	if (s->avctx->sample_aspect_ratio.num == 0)
109		✗	av_log(s->avctx, AV_LOG_ERROR, "Invalid aspect ratio.\n");
110			}
111
112		✗	s->chroma_qscale= s->qscale = get_bits(&s->gb, 5);
113		✗	skip_bits1(&s->gb); /* Continuous Presence Multipoint mode: off */
114
115		✗	if(s->pb_frame){
116		✗	skip_bits(&s->gb, 3); //temporal reference for B-frame
117		✗	skip_bits(&s->gb, 2); //dbquant
118			}
119
120			/* PEI */
121		✗	if (skip_1stop_8data_bits(&s->gb) < 0)
122		✗	return AVERROR_INVALIDDATA;
123		✗	s->f_code = 1;
124
125		✗	ff_h263_show_pict_info(s);
126
127		✗	return 0;
128			}
129
130			const FFCodec ff_h263i_decoder = {
131			.p.name = "h263i",
132			CODEC_LONG_NAME("Intel H.263"),
133			.p.type = AVMEDIA_TYPE_VIDEO,
134			.p.id = AV_CODEC_ID_H263I,
135			.priv_data_size = sizeof(MpegEncContext),
136			.init = ff_h263_decode_init,
137			.close = ff_h263_decode_end,
138			FF_CODEC_DECODE_CB(ff_h263_decode_frame),
139			.p.capabilities = AV_CODEC_CAP_DRAW_HORIZ_BAND | AV_CODEC_CAP_DR1,
140			.caps_internal = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
141			.p.pix_fmts = (const enum AVPixelFormat[]) {
142			AV_PIX_FMT_YUV420P,
143			AV_PIX_FMT_NONE
144			},
145			};
146