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 {
39 int video_stream_index;
40 int audio_stream_index;
42 unsigned char components[16];
49 static int thp_probe(AVProbeData *p)
51 /* check file header */
52 if (AV_RL32(p->buf) == MKTAG('T', 'H', 'P', '\0'))
53 return AVPROBE_SCORE_MAX;
58 static int thp_read_header(AVFormatContext *s,
59 AVFormatParameters *ap)
61 ThpDemuxContext *thp = s->priv_data;
63 AVIOContext *pb = s->pb;
64 int64_t fsize= avio_size(pb);
67 /* Read the file header. */
68 avio_rb32(pb); /* Skip Magic. */
69 thp->version = avio_rb32(pb);
71 avio_rb32(pb); /* Max buf size. */
72 avio_rb32(pb); /* Max samples. */
74 thp->fps = av_d2q(av_int2float(avio_rb32(pb)), INT_MAX);
75 thp->framecnt = avio_rb32(pb);
76 thp->first_framesz = avio_rb32(pb);
77 thp->data_size = avio_rb32(pb);
78 if(fsize>0 && (!thp->data_size || fsize < thp->data_size))
79 thp->data_size= fsize;
81 thp->compoff = avio_rb32(pb);
82 avio_rb32(pb); /* offsetDataOffset. */
83 thp->first_frame = avio_rb32(pb);
84 thp->last_frame = avio_rb32(pb);
86 thp->next_framesz = thp->first_framesz;
87 thp->next_frame = thp->first_frame;
89 /* Read the component structure. */
90 avio_seek (pb, thp->compoff, SEEK_SET);
91 thp->compcount = avio_rb32(pb);
93 /* Read the list of component types. */
94 avio_read(pb, thp->components, 16);
96 for (i = 0; i < thp->compcount; i++) {
97 if (thp->components[i] == 0) {
101 /* Video component. */
102 st = avformat_new_stream(s, NULL);
104 return AVERROR(ENOMEM);
106 /* The denominator and numerator are switched because 1/fps
108 avpriv_set_pts_info(st, 64, thp->fps.den, thp->fps.num);
109 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
110 st->codec->codec_id = CODEC_ID_THP;
111 st->codec->codec_tag = 0; /* no fourcc */
112 st->codec->width = avio_rb32(pb);
113 st->codec->height = avio_rb32(pb);
114 st->codec->sample_rate = av_q2d(thp->fps);
116 thp->video_stream_index = st->index;
118 if (thp->version == 0x11000)
119 avio_rb32(pb); /* Unknown. */
120 } else if (thp->components[i] == 1) {
121 if (thp->has_audio != 0)
124 /* Audio component. */
125 st = avformat_new_stream(s, NULL);
127 return AVERROR(ENOMEM);
129 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
130 st->codec->codec_id = CODEC_ID_ADPCM_THP;
131 st->codec->codec_tag = 0; /* no fourcc */
132 st->codec->channels = avio_rb32(pb); /* numChannels. */
133 st->codec->sample_rate = avio_rb32(pb); /* Frequency. */
135 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
137 thp->audio_stream_index = st->index;
145 static int thp_read_packet(AVFormatContext *s,
148 ThpDemuxContext *thp = s->priv_data;
149 AVIOContext *pb = s->pb;
153 if (thp->audiosize == 0) {
154 /* Terminate when last frame is reached. */
155 if (thp->frame >= thp->framecnt)
158 avio_seek(pb, thp->next_frame, SEEK_SET);
160 /* Locate the next frame and read out its size. */
161 thp->next_frame += thp->next_framesz;
162 thp->next_framesz = avio_rb32(pb);
164 avio_rb32(pb); /* Previous total size. */
165 size = avio_rb32(pb); /* Total size of this frame. */
166 if(thp->data_size && avio_tell(pb) + size > thp->data_size) {
167 av_log(s, AV_LOG_ERROR, "Video packet truncated\n");
168 size= thp->data_size - avio_tell(pb);
171 /* Store the audiosize so the next time this function is called,
172 the audio can be read. */
174 thp->audiosize = avio_rb32(pb); /* Audio size. */
178 ret = av_get_packet(pb, pkt, size);
184 pkt->stream_index = thp->video_stream_index;
186 if(thp->data_size && avio_tell(pb) + thp->audiosize > thp->data_size){
187 av_log(s, AV_LOG_ERROR, "Audio packet truncated\n");
188 thp->audiosize= thp->data_size - avio_tell(pb);
191 ret = av_get_packet(pb, pkt, thp->audiosize);
192 if (ret != thp->audiosize) {
197 pkt->stream_index = thp->audio_stream_index;
205 AVInputFormat ff_thp_demuxer = {
207 .long_name = NULL_IF_CONFIG_SMALL("THP"),
208 .priv_data_size = sizeof(ThpDemuxContext),
209 .read_probe = thp_probe,
210 .read_header = thp_read_header,
211 .read_packet = thp_read_packet