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"
26 typedef struct ThpDemuxContext {
37 int video_stream_index;
38 int audio_stream_index;
40 unsigned char components[16];
47 static int thp_probe(AVProbeData *p)
49 /* check file header */
50 if (AV_RL32(p->buf) == MKTAG('T', 'H', 'P', '\0'))
51 return AVPROBE_SCORE_MAX;
56 static int thp_read_header(AVFormatContext *s,
57 AVFormatParameters *ap)
59 ThpDemuxContext *thp = s->priv_data;
61 AVIOContext *pb = s->pb;
64 /* Read the file header. */
65 avio_rb32(pb); /* Skip Magic. */
66 thp->version = avio_rb32(pb);
68 avio_rb32(pb); /* Max buf size. */
69 avio_rb32(pb); /* Max samples. */
71 thp->fps = av_d2q(av_int2flt(avio_rb32(pb)), INT_MAX);
72 thp->framecnt = avio_rb32(pb);
73 thp->first_framesz = avio_rb32(pb);
74 avio_rb32(pb); /* Data size. */
76 thp->compoff = avio_rb32(pb);
77 avio_rb32(pb); /* offsetDataOffset. */
78 thp->first_frame = avio_rb32(pb);
79 thp->last_frame = avio_rb32(pb);
81 thp->next_framesz = thp->first_framesz;
82 thp->next_frame = thp->first_frame;
84 /* Read the component structure. */
85 avio_seek (pb, thp->compoff, SEEK_SET);
86 thp->compcount = avio_rb32(pb);
88 /* Read the list of component types. */
89 avio_read(pb, thp->components, 16);
91 for (i = 0; i < thp->compcount; i++) {
92 if (thp->components[i] == 0) {
96 /* Video component. */
97 st = av_new_stream(s, 0);
99 return AVERROR(ENOMEM);
101 /* The denominator and numerator are switched because 1/fps
103 av_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
104 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
105 st->codec->codec_id = CODEC_ID_THP;
106 st->codec->codec_tag = 0; /* no fourcc */
107 st->codec->width = avio_rb32(pb);
108 st->codec->height = avio_rb32(pb);
109 st->codec->sample_rate = av_q2d(thp->fps);
111 thp->video_stream_index = st->index;
113 if (thp->version == 0x11000)
114 avio_rb32(pb); /* Unknown. */
115 } else if (thp->components[i] == 1) {
116 if (thp->has_audio != 0)
119 /* Audio component. */
120 st = av_new_stream(s, 0);
122 return AVERROR(ENOMEM);
124 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
125 st->codec->codec_id = CODEC_ID_ADPCM_THP;
126 st->codec->codec_tag = 0; /* no fourcc */
127 st->codec->channels = avio_rb32(pb); /* numChannels. */
128 st->codec->sample_rate = avio_rb32(pb); /* Frequency. */
130 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
132 thp->audio_stream_index = st->index;
140 static int thp_read_packet(AVFormatContext *s,
143 ThpDemuxContext *thp = s->priv_data;
144 AVIOContext *pb = s->pb;
148 if (thp->audiosize == 0) {
149 /* Terminate when last frame is reached. */
150 if (thp->frame >= thp->framecnt)
153 avio_seek(pb, thp->next_frame, SEEK_SET);
155 /* Locate the next frame and read out its size. */
156 thp->next_frame += thp->next_framesz;
157 thp->next_framesz = avio_rb32(pb);
159 avio_rb32(pb); /* Previous total size. */
160 size = avio_rb32(pb); /* Total size of this frame. */
162 /* Store the audiosize so the next time this function is called,
163 the audio can be read. */
165 thp->audiosize = avio_rb32(pb); /* Audio size. */
169 ret = av_get_packet(pb, pkt, size);
175 pkt->stream_index = thp->video_stream_index;
177 ret = av_get_packet(pb, pkt, thp->audiosize);
178 if (ret != thp->audiosize) {
183 pkt->stream_index = thp->audio_stream_index;
191 AVInputFormat ff_thp_demuxer = {
193 .long_name = NULL_IF_CONFIG_SMALL("THP"),
194 .priv_data_size = sizeof(ThpDemuxContext),
195 .read_probe = thp_probe,
196 .read_header = thp_read_header,
197 .read_packet = thp_read_packet