Add FFMPEG_ prefix to all multiple inclusion guards.
[libav.git] / libavformat / dsicin.c
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1/*
2 * Delphine Software International CIN File Demuxer
3 * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22/**
23 * @file dsicin.c
24 * Delphine Software International CIN file demuxer
25 */
26
27#include "avformat.h"
28
29
30typedef struct CinFileHeader {
31 int video_frame_size;
32 int video_frame_width;
33 int video_frame_height;
34 int audio_frequency;
35 int audio_bits;
36 int audio_stereo;
37 int audio_frame_size;
38} CinFileHeader;
39
40typedef struct CinFrameHeader {
41 int audio_frame_type;
42 int video_frame_type;
43 int pal_colors_count;
44 int audio_frame_size;
45 int video_frame_size;
46} CinFrameHeader;
47
48typedef struct CinDemuxContext {
49 int audio_stream_index;
50 int video_stream_index;
51 CinFileHeader file_header;
52 int64_t audio_stream_pts;
53 int64_t video_stream_pts;
54 CinFrameHeader frame_header;
55 int audio_buffer_size;
56} CinDemuxContext;
57
58
59static int cin_probe(AVProbeData *p)
60{
72450e50 61 /* header starts with this special marker */
fead30d4 62 if (AV_RL32(&p->buf[0]) != 0x55AA0000)
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63 return 0;
64
65 /* for accuracy, check some header field values */
fead30d4 66 if (AV_RL32(&p->buf[12]) != 22050 || p->buf[16] != 16 || p->buf[17] != 0)
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67 return 0;
68
69 return AVPROBE_SCORE_MAX;
70}
71
72static int cin_read_file_header(CinDemuxContext *cin, ByteIOContext *pb) {
73 CinFileHeader *hdr = &cin->file_header;
74
75 if (get_le32(pb) != 0x55AA0000)
76 return AVERROR_INVALIDDATA;
77
78 hdr->video_frame_size = get_le32(pb);
79 hdr->video_frame_width = get_le16(pb);
80 hdr->video_frame_height = get_le16(pb);
81 hdr->audio_frequency = get_le32(pb);
82 hdr->audio_bits = get_byte(pb);
83 hdr->audio_stereo = get_byte(pb);
84 hdr->audio_frame_size = get_le16(pb);
85
86 if (hdr->audio_frequency != 22050 || hdr->audio_bits != 16 || hdr->audio_stereo != 0)
87 return AVERROR_INVALIDDATA;
88
89 return 0;
90}
91
92static int cin_read_header(AVFormatContext *s, AVFormatParameters *ap)
93{
94 int rc;
e4141433 95 CinDemuxContext *cin = s->priv_data;
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96 CinFileHeader *hdr = &cin->file_header;
97 ByteIOContext *pb = &s->pb;
98 AVStream *st;
99
100 rc = cin_read_file_header(cin, pb);
101 if (rc)
102 return rc;
103
104 cin->video_stream_pts = 0;
105 cin->audio_stream_pts = 0;
106 cin->audio_buffer_size = 0;
107
108 /* initialize the video decoder stream */
109 st = av_new_stream(s, 0);
110 if (!st)
769e10f0 111 return AVERROR(ENOMEM);
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112
113 av_set_pts_info(st, 32, 1, 12);
114 cin->video_stream_index = st->index;
115 st->codec->codec_type = CODEC_TYPE_VIDEO;
116 st->codec->codec_id = CODEC_ID_DSICINVIDEO;
117 st->codec->codec_tag = 0; /* no fourcc */
118 st->codec->width = hdr->video_frame_width;
119 st->codec->height = hdr->video_frame_height;
120
121 /* initialize the audio decoder stream */
122 st = av_new_stream(s, 0);
123 if (!st)
769e10f0 124 return AVERROR(ENOMEM);
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125
126 av_set_pts_info(st, 32, 1, 22050);
127 cin->audio_stream_index = st->index;
128 st->codec->codec_type = CODEC_TYPE_AUDIO;
129 st->codec->codec_id = CODEC_ID_DSICINAUDIO;
130 st->codec->codec_tag = 0; /* no tag */
131 st->codec->channels = 1;
132 st->codec->sample_rate = 22050;
133 st->codec->bits_per_sample = 16;
134 st->codec->bit_rate = st->codec->sample_rate * st->codec->bits_per_sample * st->codec->channels;
135 st->codec->block_align = st->codec->channels * st->codec->bits_per_sample;
136
137 return 0;
138}
139
140static int cin_read_frame_header(CinDemuxContext *cin, ByteIOContext *pb) {
141 CinFrameHeader *hdr = &cin->frame_header;
142
143 hdr->video_frame_type = get_byte(pb);
144 hdr->audio_frame_type = get_byte(pb);
145 hdr->pal_colors_count = get_le16(pb);
146 hdr->video_frame_size = get_le32(pb);
147 hdr->audio_frame_size = get_le32(pb);
148
149 if (url_feof(pb) || url_ferror(pb))
6f3e0b21 150 return AVERROR(EIO);
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151
152 if (get_le32(pb) != 0xAA55AA55)
153 return AVERROR_INVALIDDATA;
154
155 return 0;
156}
157
158static int cin_read_packet(AVFormatContext *s, AVPacket *pkt)
159{
e4141433 160 CinDemuxContext *cin = s->priv_data;
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161 ByteIOContext *pb = &s->pb;
162 CinFrameHeader *hdr = &cin->frame_header;
163 int rc, palette_type, pkt_size;
164
165 if (cin->audio_buffer_size == 0) {
166 rc = cin_read_frame_header(cin, pb);
167 if (rc)
168 return rc;
169
170 if ((int16_t)hdr->pal_colors_count < 0) {
171 hdr->pal_colors_count = -(int16_t)hdr->pal_colors_count;
172 palette_type = 1;
173 } else {
174 palette_type = 0;
175 }
176
177 /* palette and video packet */
178 pkt_size = (palette_type + 3) * hdr->pal_colors_count + hdr->video_frame_size;
179
180 if (av_new_packet(pkt, 4 + pkt_size))
769e10f0 181 return AVERROR(ENOMEM);
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182
183 pkt->stream_index = cin->video_stream_index;
184 pkt->pts = cin->video_stream_pts++;
185
186 pkt->data[0] = palette_type;
187 pkt->data[1] = hdr->pal_colors_count & 0xFF;
188 pkt->data[2] = hdr->pal_colors_count >> 8;
189 pkt->data[3] = hdr->video_frame_type;
190
191 if (get_buffer(pb, &pkt->data[4], pkt_size) != pkt_size)
6f3e0b21 192 return AVERROR(EIO);
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193
194 /* sound buffer will be processed on next read_packet() call */
195 cin->audio_buffer_size = hdr->audio_frame_size;
196 return 0;
197 }
198
199 /* audio packet */
200 if (av_new_packet(pkt, cin->audio_buffer_size))
769e10f0 201 return AVERROR(ENOMEM);
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202
203 pkt->stream_index = cin->audio_stream_index;
204 pkt->pts = cin->audio_stream_pts;
205 cin->audio_stream_pts += cin->audio_buffer_size * 2 / cin->file_header.audio_frame_size;
206
207 if (get_buffer(pb, pkt->data, cin->audio_buffer_size) != cin->audio_buffer_size)
6f3e0b21 208 return AVERROR(EIO);
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209
210 cin->audio_buffer_size = 0;
211 return 0;
212}
213
214AVInputFormat dsicin_demuxer = {
215 "dsicin",
216 "Delphine Software International CIN format",
217 sizeof(CinDemuxContext),
218 cin_probe,
219 cin_read_header,
220 cin_read_packet,
221};