FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* RTP packetizer for VC-2 HQ payload format (draft version 1) - experimental
3			* Copyright (c) 2016 Thomas Volkert <thomas@netzeal.de>
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			#include "libavutil/intreadwrite.h"
23			#include "libavcodec/dirac.h"
24			#include "libavcodec/get_bits.h"
25			#include "libavcodec/golomb.h"
26
27			#include "avformat.h"
28			#include "rtpenc.h"
29
30			#define RTP_VC2HQ_PL_HEADER_SIZE 4
31
32			#define DIRAC_DATA_UNIT_HEADER_SIZE 13
33			#define DIRAC_PIC_NR_SIZE 4
34			#define DIRAC_RTP_PCODE_HQ_PIC_FRAGMENT 0xEC
35
36		✗	static void send_packet(AVFormatContext *ctx, uint8_t parse_code, int info_hdr_size, const uint8_t *buf, int size, int i, int f, int rtp_m)
37			{
38		✗	RTPMuxContext *rtp_ctx = ctx->priv_data;
39
40		✗	AV_WB16(&rtp_ctx->buf[0], 0); /* extended sequence number */
41		✗	AV_WB8 (&rtp_ctx->buf[2], i ? (f ? (0x03) : (0x02)) : 0x00); /* flags: interlaced, second field */
42		✗	AV_WB8 (&rtp_ctx->buf[3], parse_code);
43		✗	if (size > 0)
44		✗	memcpy(&rtp_ctx->buf[4 + info_hdr_size], buf, size);
45		✗	ff_rtp_send_data(ctx, rtp_ctx->buf, RTP_VC2HQ_PL_HEADER_SIZE + info_hdr_size + size, rtp_m);
46		✗	}
47
48		✗	static int send_picture(AVFormatContext *ctx, const uint8_t *buf, int size, int interlaced)
49			{
50		✗	RTPMuxContext *rtp_ctx = ctx->priv_data;
51			GetBitContext gc;
52			int lvl, second_field;
53			uint32_t pic_nr, wavelet_depth, prefix_bytes, size_scaler;
54			uint16_t frag_len;
55		✗	char *info_hdr = &rtp_ctx->buf[4];
56
57		✗	if (size < DIRAC_PIC_NR_SIZE)
58		✗	return AVERROR(EINVAL);
59
60		✗	pic_nr = AV_RB32(&buf[0]);
61		✗	buf += DIRAC_PIC_NR_SIZE;
62		✗	size -= DIRAC_PIC_NR_SIZE;
63		✗	second_field = interlaced && (pic_nr & 0x01);
64
65		✗	init_get_bits(&gc, buf, 8 * size);
66		✗	get_interleaved_ue_golomb(&gc); /* wavelet_idx */
67		✗	wavelet_depth = get_interleaved_ue_golomb(&gc);
68		✗	get_interleaved_ue_golomb(&gc); /* num_x */
69		✗	get_interleaved_ue_golomb(&gc); /* num_y */
70		✗	prefix_bytes = get_interleaved_ue_golomb(&gc);
71		✗	size_scaler = get_interleaved_ue_golomb(&gc);
72			/* pass the quantization matrices */
73		✗	get_interleaved_ue_golomb(&gc);
74		✗	for(lvl = 0; lvl < wavelet_depth; lvl++)
75			{
76		✗	get_interleaved_ue_golomb(&gc);
77		✗	get_interleaved_ue_golomb(&gc);
78		✗	get_interleaved_ue_golomb(&gc);
79			}
80
81		✗	frag_len = (get_bits_count(&gc) + 7) / 8; /* length of transform parameters */
82
83		✗	AV_WB32(&info_hdr[ 0], pic_nr);
84		✗	AV_WB16(&info_hdr[ 4], prefix_bytes);
85		✗	AV_WB16(&info_hdr[ 6], size_scaler);
86		✗	AV_WB16(&info_hdr[ 8], frag_len);
87		✗	AV_WB16(&info_hdr[10], 0 /* nr. of slices */);
88		✗	send_packet(ctx, DIRAC_RTP_PCODE_HQ_PIC_FRAGMENT, 12, buf, frag_len, interlaced, second_field, 0);
89		✗	buf += frag_len;
90		✗	size -= frag_len;
91
92		✗	while (size > 0) {
93		✗	frag_len = FFMIN(rtp_ctx->max_payload_size - 20 /* pl header */, size);
94		✗	AV_WB16(&info_hdr[ 8], frag_len);
95		✗	AV_WB16(&info_hdr[10], 1 /* nr. of slices */);
96		✗	AV_WB16(&info_hdr[12], 0 /* slice x */);
97		✗	AV_WB16(&info_hdr[14], 0 /* slice y */);
98
99		✗	size -= frag_len;
100		✗	send_packet(ctx, DIRAC_RTP_PCODE_HQ_PIC_FRAGMENT, 16, buf, frag_len, interlaced, second_field, size > 0 ? 0 : 1);
101		✗	buf += frag_len;
102			}
103		✗	return 0;
104			}
105
106		✗	void ff_rtp_send_vc2hq(AVFormatContext *ctx, const uint8_t *frame_buf, int frame_size, int interlaced)
107			{
108		✗	const uint8_t *end = frame_buf + frame_size;
109		✗	const uint8_t *unit = frame_buf;
110			uint8_t parse_code;
111			uint32_t unit_size;
112
113		✗	while (unit < end) {
114		✗	parse_code = unit[4];
115		✗	unit_size = AV_RB32(&unit[5]);
116
117		✗	if (unit_size > end - unit)
118		✗	break;
119
120		✗	switch (parse_code) {
121			/* sequence header */
122			/* end of sequence */
123		✗	case DIRAC_PCODE_SEQ_HEADER:
124			case DIRAC_PCODE_END_SEQ:
125		✗	if (unit_size >= DIRAC_DATA_UNIT_HEADER_SIZE)
126		✗	send_packet(ctx, parse_code, 0, unit + DIRAC_DATA_UNIT_HEADER_SIZE, unit_size - DIRAC_DATA_UNIT_HEADER_SIZE, 0, 0, 0);
127		✗	break;
128			/* HQ picture */
129		✗	case DIRAC_PCODE_PICTURE_HQ:
130		✗	if (unit_size >= DIRAC_DATA_UNIT_HEADER_SIZE)
131		✗	send_picture(ctx, unit + DIRAC_DATA_UNIT_HEADER_SIZE, unit_size - DIRAC_DATA_UNIT_HEADER_SIZE, interlaced);
132		✗	break;
133			/* parse codes without specification */
134		✗	case DIRAC_PCODE_AUX:
135			case DIRAC_PCODE_PAD:
136		✗	break;
137		✗	default:
138		✗	avpriv_report_missing_feature(ctx, "VC-2 parse code %d", parse_code);
139		✗	break;
140			}
141		✗	unit += unit_size;
142			}
143		✗	}
144