Use avpriv_report_missing_feature() where appropriate
[libav.git] / libavformat / oggparseopus.c
1 /*
2 * Opus parser for Ogg
3 * Copyright (c) 2012 Nicolas George
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <string.h>
23
24 #include "libavutil/intreadwrite.h"
25 #include "avformat.h"
26 #include "internal.h"
27 #include "oggdec.h"
28
29 struct oggopus_private {
30 int need_comments;
31 unsigned pre_skip;
32 int64_t cur_dts;
33 };
34
35 #define OPUS_HEAD_SIZE 19
36
37 static int opus_header(AVFormatContext *avf, int idx)
38 {
39 struct ogg *ogg = avf->priv_data;
40 struct ogg_stream *os = &ogg->streams[idx];
41 AVStream *st = avf->streams[idx];
42 struct oggopus_private *priv = os->private;
43 uint8_t *packet = os->buf + os->pstart;
44 uint8_t *extradata;
45
46 if (!priv) {
47 priv = os->private = av_mallocz(sizeof(*priv));
48 if (!priv)
49 return AVERROR(ENOMEM);
50 }
51 if (os->flags & OGG_FLAG_BOS) {
52 if (os->psize < OPUS_HEAD_SIZE || (AV_RL8(packet + 8) & 0xF0) != 0)
53 return AVERROR_INVALIDDATA;
54
55 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
56 st->codecpar->codec_id = AV_CODEC_ID_OPUS;
57 st->codecpar->channels = AV_RL8(packet + 9);
58 priv->pre_skip = AV_RL16(packet + 10);
59
60 st->codecpar->initial_padding = priv->pre_skip;
61
62 extradata = av_malloc(os->psize + AV_INPUT_BUFFER_PADDING_SIZE);
63 if (!extradata)
64 return AVERROR(ENOMEM);
65
66 memcpy(extradata, packet, os->psize);
67 st->codecpar->extradata = extradata;
68 st->codecpar->extradata_size = os->psize;
69
70 st->codecpar->sample_rate = 48000;
71 avpriv_set_pts_info(st, 64, 1, 48000);
72 priv->need_comments = 1;
73 return 1;
74 }
75
76 if (priv->need_comments) {
77 if (os->psize < 8 || memcmp(packet, "OpusTags", 8))
78 return AVERROR_INVALIDDATA;
79 ff_vorbis_stream_comment(avf, st, packet + 8, os->psize - 8);
80 priv->need_comments--;
81 return 1;
82 }
83
84 return 0;
85 }
86
87 static int opus_packet(AVFormatContext *avf, int idx)
88 {
89 struct ogg *ogg = avf->priv_data;
90 struct ogg_stream *os = &ogg->streams[idx];
91 AVStream *st = avf->streams[idx];
92 struct oggopus_private *priv = os->private;
93 uint8_t *packet = os->buf + os->pstart;
94 unsigned toc, toc_config, toc_count, frame_size, nb_frames = 1;
95
96 if (!os->psize)
97 return AVERROR_INVALIDDATA;
98
99 toc = *packet;
100 toc_config = toc >> 3;
101 toc_count = toc & 3;
102 frame_size = toc_config < 12 ? FFMAX(480, 960 * (toc_config & 3)) :
103 toc_config < 16 ? 480 << (toc_config & 1) :
104 120 << (toc_config & 3);
105 if (toc_count == 3) {
106 if (os->psize < 2)
107 return AVERROR_INVALIDDATA;
108 nb_frames = packet[1] & 0x3F;
109 } else if (toc_count) {
110 nb_frames = 2;
111 }
112
113 os->pduration = frame_size * nb_frames;
114 if (os->lastpts != AV_NOPTS_VALUE) {
115 if (st->start_time == AV_NOPTS_VALUE)
116 st->start_time = os->lastpts;
117 priv->cur_dts = os->lastdts = os->lastpts -= priv->pre_skip;
118 }
119
120 priv->cur_dts += os->pduration;
121 if ((os->flags & OGG_FLAG_EOS)) {
122 int64_t skip = priv->cur_dts - os->granule + priv->pre_skip;
123 skip = FFMIN(skip, os->pduration);
124 if (skip > 0) {
125 os->pduration = skip < os->pduration ? os->pduration - skip : 1;
126 avpriv_report_missing_feature(avf,
127 "Last packet truncated to %u since end trim support",
128 os->pduration);
129 return AVERROR_PATCHWELCOME;
130 }
131 }
132
133 return 0;
134 }
135
136 const struct ogg_codec ff_opus_codec = {
137 .name = "Opus",
138 .magic = "OpusHead",
139 .magicsize = 8,
140 .header = opus_header,
141 .packet = opus_packet,
142 .granule_is_start = 1,
143 .nb_header = 1,
144 };