3 * Copyright (c) 2007 Marco Gerards
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/intfloat_readwrite.h"
27 typedef struct ThpDemuxContext {
38 int video_stream_index;
39 int audio_stream_index;
41 unsigned char components[16];
48 static int thp_probe(AVProbeData *p)
50 /* check file header */
51 if (AV_RL32(p->buf) == MKTAG('T', 'H', 'P', '\0'))
52 return AVPROBE_SCORE_MAX;
57 static int thp_read_header(AVFormatContext *s,
58 AVFormatParameters *ap)
60 ThpDemuxContext *thp = s->priv_data;
62 AVIOContext *pb = s->pb;
65 /* Read the file header. */
66 avio_rb32(pb); /* Skip Magic. */
67 thp->version = avio_rb32(pb);
69 avio_rb32(pb); /* Max buf size. */
70 avio_rb32(pb); /* Max samples. */
72 thp->fps = av_d2q(av_int2flt(avio_rb32(pb)), INT_MAX);
73 thp->framecnt = avio_rb32(pb);
74 thp->first_framesz = avio_rb32(pb);
75 avio_rb32(pb); /* Data size. */
77 thp->compoff = avio_rb32(pb);
78 avio_rb32(pb); /* offsetDataOffset. */
79 thp->first_frame = avio_rb32(pb);
80 thp->last_frame = avio_rb32(pb);
82 thp->next_framesz = thp->first_framesz;
83 thp->next_frame = thp->first_frame;
85 /* Read the component structure. */
86 avio_seek (pb, thp->compoff, SEEK_SET);
87 thp->compcount = avio_rb32(pb);
89 /* Read the list of component types. */
90 avio_read(pb, thp->components, 16);
92 for (i = 0; i < thp->compcount; i++) {
93 if (thp->components[i] == 0) {
97 /* Video component. */
98 st = avformat_new_stream(s, NULL);
100 return AVERROR(ENOMEM);
102 /* The denominator and numerator are switched because 1/fps
104 avpriv_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
105 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
106 st->codec->codec_id = CODEC_ID_THP;
107 st->codec->codec_tag = 0; /* no fourcc */
108 st->codec->width = avio_rb32(pb);
109 st->codec->height = avio_rb32(pb);
110 st->codec->sample_rate = av_q2d(thp->fps);
112 thp->video_stream_index = st->index;
114 if (thp->version == 0x11000)
115 avio_rb32(pb); /* Unknown. */
116 } else if (thp->components[i] == 1) {
117 if (thp->has_audio != 0)
120 /* Audio component. */
121 st = avformat_new_stream(s, NULL);
123 return AVERROR(ENOMEM);
125 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
126 st->codec->codec_id = CODEC_ID_ADPCM_THP;
127 st->codec->codec_tag = 0; /* no fourcc */
128 st->codec->channels = avio_rb32(pb); /* numChannels. */
129 st->codec->sample_rate = avio_rb32(pb); /* Frequency. */
131 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
133 thp->audio_stream_index = st->index;
141 static int thp_read_packet(AVFormatContext *s,
144 ThpDemuxContext *thp = s->priv_data;
145 AVIOContext *pb = s->pb;
149 if (thp->audiosize == 0) {
150 /* Terminate when last frame is reached. */
151 if (thp->frame >= thp->framecnt)
154 avio_seek(pb, thp->next_frame, SEEK_SET);
156 /* Locate the next frame and read out its size. */
157 thp->next_frame += thp->next_framesz;
158 thp->next_framesz = avio_rb32(pb);
160 avio_rb32(pb); /* Previous total size. */
161 size = avio_rb32(pb); /* Total size of this frame. */
163 /* Store the audiosize so the next time this function is called,
164 the audio can be read. */
166 thp->audiosize = avio_rb32(pb); /* Audio size. */
170 ret = av_get_packet(pb, pkt, size);
176 pkt->stream_index = thp->video_stream_index;
178 ret = av_get_packet(pb, pkt, thp->audiosize);
179 if (ret != thp->audiosize) {
184 pkt->stream_index = thp->audio_stream_index;
192 AVInputFormat ff_thp_demuxer = {
194 .long_name = NULL_IF_CONFIG_SMALL("THP"),
195 .priv_data_size = sizeof(ThpDemuxContext),
196 .read_probe = thp_probe,
197 .read_header = thp_read_header,
198 .read_packet = thp_read_packet