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 {
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;
63 int64_t fsize= avio_size(pb);
66 /* Read the file header. */
67 avio_rb32(pb); /* Skip Magic. */
68 thp->version = avio_rb32(pb);
70 avio_rb32(pb); /* Max buf size. */
71 avio_rb32(pb); /* Max samples. */
73 thp->fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
74 thp->framecnt = avio_rb32(pb);
75 thp->first_framesz = avio_rb32(pb);
76 pb->maxsize = avio_rb32(pb);
77 if(fsize>0 && (!pb->maxsize || fsize < pb->maxsize))
80 thp->compoff = avio_rb32(pb);
81 avio_rb32(pb); /* offsetDataOffset. */
82 thp->first_frame = avio_rb32(pb);
83 thp->last_frame = avio_rb32(pb);
85 thp->next_framesz = thp->first_framesz;
86 thp->next_frame = thp->first_frame;
88 /* Read the component structure. */
89 avio_seek (pb, thp->compoff, SEEK_SET);
90 thp->compcount = avio_rb32(pb);
92 /* Read the list of component types. */
93 avio_read(pb, thp->components, 16);
95 for (i = 0; i < thp->compcount; i++) {
96 if (thp->components[i] == 0) {
100 /* Video component. */
101 st = avformat_new_stream(s, NULL);
103 return AVERROR(ENOMEM);
105 /* The denominator and numerator are switched because 1/fps
107 avpriv_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
108 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
109 st->codec->codec_id = CODEC_ID_THP;
110 st->codec->codec_tag = 0; /* no fourcc */
111 st->codec->width = avio_rb32(pb);
112 st->codec->height = avio_rb32(pb);
113 st->codec->sample_rate = av_q2d(thp->fps);
115 thp->video_stream_index = st->index;
117 if (thp->version == 0x11000)
118 avio_rb32(pb); /* Unknown. */
119 } else if (thp->components[i] == 1) {
120 if (thp->has_audio != 0)
123 /* Audio component. */
124 st = avformat_new_stream(s, NULL);
126 return AVERROR(ENOMEM);
128 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
129 st->codec->codec_id = CODEC_ID_ADPCM_THP;
130 st->codec->codec_tag = 0; /* no fourcc */
131 st->codec->channels = avio_rb32(pb); /* numChannels. */
132 st->codec->sample_rate = avio_rb32(pb); /* Frequency. */
134 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
136 thp->audio_stream_index = st->index;
144 static int thp_read_packet(AVFormatContext *s,
147 ThpDemuxContext *thp = s->priv_data;
148 AVIOContext *pb = s->pb;
152 if (thp->audiosize == 0) {
153 /* Terminate when last frame is reached. */
154 if (thp->frame >= thp->framecnt)
157 avio_seek(pb, thp->next_frame, SEEK_SET);
159 /* Locate the next frame and read out its size. */
160 thp->next_frame += thp->next_framesz;
161 thp->next_framesz = avio_rb32(pb);
163 avio_rb32(pb); /* Previous total size. */
164 size = avio_rb32(pb); /* Total size of this frame. */
166 /* Store the audiosize so the next time this function is called,
167 the audio can be read. */
169 thp->audiosize = avio_rb32(pb); /* Audio size. */
173 ret = av_get_packet(pb, pkt, size);
179 pkt->stream_index = thp->video_stream_index;
181 ret = av_get_packet(pb, pkt, thp->audiosize);
182 if (ret != thp->audiosize) {
187 pkt->stream_index = thp->audio_stream_index;
195 AVInputFormat ff_thp_demuxer = {
197 .long_name = NULL_IF_CONFIG_SMALL("THP"),
198 .priv_data_size = sizeof(ThpDemuxContext),
199 .read_probe = thp_probe,
200 .read_header = thp_read_header,
201 .read_packet = thp_read_packet