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.h"
27 typedef struct ThpDemuxContext {
30 unsigned first_framesz;
37 unsigned next_framesz;
38 int video_stream_index;
39 int audio_stream_index;
41 unsigned char components[16];
48 static int thp_probe(AVProbeData *p)
51 /* check file header */
52 if (AV_RL32(p->buf) != MKTAG('T', 'H', 'P', '\0'))
55 d = av_int2float(AV_RB32(p->buf + 16));
56 if (d < 0.1 || d > 1000 || isnan(d))
57 return AVPROBE_SCORE_MAX/4;
59 return AVPROBE_SCORE_MAX;
62 static int thp_read_header(AVFormatContext *s)
64 ThpDemuxContext *thp = s->priv_data;
66 AVIOContext *pb = s->pb;
67 int64_t fsize= avio_size(pb);
70 /* Read the file header. */
71 avio_rb32(pb); /* Skip Magic. */
72 thp->version = avio_rb32(pb);
74 avio_rb32(pb); /* Max buf size. */
75 avio_rb32(pb); /* Max samples. */
77 thp->fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
78 thp->framecnt = avio_rb32(pb);
79 thp->first_framesz = avio_rb32(pb);
80 pb->maxsize = avio_rb32(pb);
81 if(fsize>0 && (!pb->maxsize || fsize < pb->maxsize))
84 thp->compoff = avio_rb32(pb);
85 avio_rb32(pb); /* offsetDataOffset. */
86 thp->first_frame = avio_rb32(pb);
87 thp->last_frame = avio_rb32(pb);
89 thp->next_framesz = thp->first_framesz;
90 thp->next_frame = thp->first_frame;
92 /* Read the component structure. */
93 avio_seek (pb, thp->compoff, SEEK_SET);
94 thp->compcount = avio_rb32(pb);
96 /* Read the list of component types. */
97 avio_read(pb, thp->components, 16);
99 for (i = 0; i < thp->compcount; i++) {
100 if (thp->components[i] == 0) {
104 /* Video component. */
105 st = avformat_new_stream(s, NULL);
107 return AVERROR(ENOMEM);
109 /* The denominator and numerator are switched because 1/fps
111 avpriv_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
112 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
113 st->codecpar->codec_id = AV_CODEC_ID_THP;
114 st->codecpar->codec_tag = 0; /* no fourcc */
115 st->codecpar->width = avio_rb32(pb);
116 st->codecpar->height = avio_rb32(pb);
117 st->codecpar->sample_rate = av_q2d(thp->fps);
119 st->duration = thp->framecnt;
121 thp->video_stream_index = st->index;
123 if (thp->version == 0x11000)
124 avio_rb32(pb); /* Unknown. */
125 } else if (thp->components[i] == 1) {
126 if (thp->has_audio != 0)
129 /* Audio component. */
130 st = avformat_new_stream(s, NULL);
132 return AVERROR(ENOMEM);
134 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
135 st->codecpar->codec_id = AV_CODEC_ID_ADPCM_THP;
136 st->codecpar->codec_tag = 0; /* no fourcc */
137 st->codecpar->channels = avio_rb32(pb); /* numChannels. */
138 st->codecpar->sample_rate = avio_rb32(pb); /* Frequency. */
139 st->duration = avio_rb32(pb);
141 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
143 thp->audio_stream_index = st->index;
151 static int thp_read_packet(AVFormatContext *s,
154 ThpDemuxContext *thp = s->priv_data;
155 AVIOContext *pb = s->pb;
159 if (thp->audiosize == 0) {
160 /* Terminate when last frame is reached. */
161 if (thp->frame >= thp->framecnt)
164 avio_seek(pb, thp->next_frame, SEEK_SET);
166 /* Locate the next frame and read out its size. */
167 thp->next_frame += FFMAX(thp->next_framesz, 1);
168 thp->next_framesz = avio_rb32(pb);
170 avio_rb32(pb); /* Previous total size. */
171 size = avio_rb32(pb); /* Total size of this frame. */
173 /* Store the audiosize so the next time this function is called,
174 the audio can be read. */
176 thp->audiosize = avio_rb32(pb); /* Audio size. */
180 ret = av_get_packet(pb, pkt, size);
184 av_packet_unref(pkt);
188 pkt->stream_index = thp->video_stream_index;
190 ret = av_get_packet(pb, pkt, thp->audiosize);
193 if (ret != thp->audiosize) {
194 av_packet_unref(pkt);
198 pkt->stream_index = thp->audio_stream_index;
199 if (thp->audiosize >= 8)
200 pkt->duration = AV_RB32(&pkt->data[4]);
209 AVInputFormat ff_thp_demuxer = {
211 .long_name = NULL_IF_CONFIG_SMALL("THP"),
212 .priv_data_size = sizeof(ThpDemuxContext),
213 .read_probe = thp_probe,
214 .read_header = thp_read_header,
215 .read_packet = thp_read_packet