blob: bd4f3ad03aefb5f812ec2581a0beac12cf1d6809
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 |
24 | * Delphine Software International CIN file demuxer |
25 | */ |
26 | |
27 | #include "libavutil/channel_layout.h" |
28 | #include "libavutil/intreadwrite.h" |
29 | #include "avformat.h" |
30 | #include "internal.h" |
31 | #include "avio_internal.h" |
32 | |
33 | |
34 | typedef struct CinFileHeader { |
35 | int video_frame_size; |
36 | int video_frame_width; |
37 | int video_frame_height; |
38 | int audio_frequency; |
39 | int audio_bits; |
40 | int audio_stereo; |
41 | int audio_frame_size; |
42 | } CinFileHeader; |
43 | |
44 | typedef struct CinFrameHeader { |
45 | int audio_frame_type; |
46 | int video_frame_type; |
47 | int pal_colors_count; |
48 | int audio_frame_size; |
49 | int video_frame_size; |
50 | } CinFrameHeader; |
51 | |
52 | typedef struct CinDemuxContext { |
53 | int audio_stream_index; |
54 | int video_stream_index; |
55 | CinFileHeader file_header; |
56 | int64_t audio_stream_pts; |
57 | int64_t video_stream_pts; |
58 | CinFrameHeader frame_header; |
59 | int audio_buffer_size; |
60 | } CinDemuxContext; |
61 | |
62 | |
63 | static int cin_probe(AVProbeData *p) |
64 | { |
65 | /* header starts with this special marker */ |
66 | if (AV_RL32(&p->buf[0]) != 0x55AA0000) |
67 | return 0; |
68 | |
69 | /* for accuracy, check some header field values */ |
70 | if (AV_RL32(&p->buf[12]) != 22050 || p->buf[16] != 16 || p->buf[17] != 0) |
71 | return 0; |
72 | |
73 | return AVPROBE_SCORE_MAX; |
74 | } |
75 | |
76 | static int cin_read_file_header(CinDemuxContext *cin, AVIOContext *pb) { |
77 | CinFileHeader *hdr = &cin->file_header; |
78 | |
79 | if (avio_rl32(pb) != 0x55AA0000) |
80 | return AVERROR_INVALIDDATA; |
81 | |
82 | hdr->video_frame_size = avio_rl32(pb); |
83 | hdr->video_frame_width = avio_rl16(pb); |
84 | hdr->video_frame_height = avio_rl16(pb); |
85 | hdr->audio_frequency = avio_rl32(pb); |
86 | hdr->audio_bits = avio_r8(pb); |
87 | hdr->audio_stereo = avio_r8(pb); |
88 | hdr->audio_frame_size = avio_rl16(pb); |
89 | |
90 | if (hdr->audio_frequency != 22050 || hdr->audio_bits != 16 || hdr->audio_stereo != 0) |
91 | return AVERROR_INVALIDDATA; |
92 | |
93 | return 0; |
94 | } |
95 | |
96 | static int cin_read_header(AVFormatContext *s) |
97 | { |
98 | int rc; |
99 | CinDemuxContext *cin = s->priv_data; |
100 | CinFileHeader *hdr = &cin->file_header; |
101 | AVIOContext *pb = s->pb; |
102 | AVStream *st; |
103 | |
104 | rc = cin_read_file_header(cin, pb); |
105 | if (rc) |
106 | return rc; |
107 | |
108 | cin->video_stream_pts = 0; |
109 | cin->audio_stream_pts = 0; |
110 | cin->audio_buffer_size = 0; |
111 | |
112 | /* initialize the video decoder stream */ |
113 | st = avformat_new_stream(s, NULL); |
114 | if (!st) |
115 | return AVERROR(ENOMEM); |
116 | |
117 | avpriv_set_pts_info(st, 32, 1, 12); |
118 | cin->video_stream_index = st->index; |
119 | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
120 | st->codecpar->codec_id = AV_CODEC_ID_DSICINVIDEO; |
121 | st->codecpar->codec_tag = 0; /* no fourcc */ |
122 | st->codecpar->width = hdr->video_frame_width; |
123 | st->codecpar->height = hdr->video_frame_height; |
124 | |
125 | /* initialize the audio decoder stream */ |
126 | st = avformat_new_stream(s, NULL); |
127 | if (!st) |
128 | return AVERROR(ENOMEM); |
129 | |
130 | avpriv_set_pts_info(st, 32, 1, 22050); |
131 | cin->audio_stream_index = st->index; |
132 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
133 | st->codecpar->codec_id = AV_CODEC_ID_DSICINAUDIO; |
134 | st->codecpar->codec_tag = 0; /* no tag */ |
135 | st->codecpar->channels = 1; |
136 | st->codecpar->channel_layout = AV_CH_LAYOUT_MONO; |
137 | st->codecpar->sample_rate = 22050; |
138 | st->codecpar->bits_per_coded_sample = 8; |
139 | st->codecpar->bit_rate = st->codecpar->sample_rate * st->codecpar->bits_per_coded_sample * st->codecpar->channels; |
140 | |
141 | return 0; |
142 | } |
143 | |
144 | static int cin_read_frame_header(CinDemuxContext *cin, AVIOContext *pb) { |
145 | CinFrameHeader *hdr = &cin->frame_header; |
146 | |
147 | hdr->video_frame_type = avio_r8(pb); |
148 | hdr->audio_frame_type = avio_r8(pb); |
149 | hdr->pal_colors_count = avio_rl16(pb); |
150 | hdr->video_frame_size = avio_rl32(pb); |
151 | hdr->audio_frame_size = avio_rl32(pb); |
152 | |
153 | if (avio_feof(pb) || pb->error) |
154 | return AVERROR(EIO); |
155 | |
156 | if (avio_rl32(pb) != 0xAA55AA55) |
157 | return AVERROR_INVALIDDATA; |
158 | if (hdr->video_frame_size < 0 || hdr->audio_frame_size < 0) |
159 | return AVERROR_INVALIDDATA; |
160 | |
161 | return 0; |
162 | } |
163 | |
164 | static int cin_read_packet(AVFormatContext *s, AVPacket *pkt) |
165 | { |
166 | CinDemuxContext *cin = s->priv_data; |
167 | AVIOContext *pb = s->pb; |
168 | CinFrameHeader *hdr = &cin->frame_header; |
169 | int rc, palette_type, pkt_size; |
170 | int ret; |
171 | |
172 | if (cin->audio_buffer_size == 0) { |
173 | rc = cin_read_frame_header(cin, pb); |
174 | if (rc) |
175 | return rc; |
176 | |
177 | if ((int16_t)hdr->pal_colors_count < 0) { |
178 | hdr->pal_colors_count = -(int16_t)hdr->pal_colors_count; |
179 | palette_type = 1; |
180 | } else { |
181 | palette_type = 0; |
182 | } |
183 | |
184 | /* palette and video packet */ |
185 | pkt_size = (palette_type + 3) * hdr->pal_colors_count + hdr->video_frame_size; |
186 | |
187 | pkt_size = ffio_limit(pb, pkt_size); |
188 | |
189 | ret = av_new_packet(pkt, 4 + pkt_size); |
190 | if (ret < 0) |
191 | return ret; |
192 | |
193 | pkt->stream_index = cin->video_stream_index; |
194 | pkt->pts = cin->video_stream_pts++; |
195 | |
196 | pkt->data[0] = palette_type; |
197 | pkt->data[1] = hdr->pal_colors_count & 0xFF; |
198 | pkt->data[2] = hdr->pal_colors_count >> 8; |
199 | pkt->data[3] = hdr->video_frame_type; |
200 | |
201 | ret = avio_read(pb, &pkt->data[4], pkt_size); |
202 | if (ret < 0) { |
203 | av_packet_unref(pkt); |
204 | return ret; |
205 | } |
206 | if (ret < pkt_size) |
207 | av_shrink_packet(pkt, 4 + ret); |
208 | |
209 | /* sound buffer will be processed on next read_packet() call */ |
210 | cin->audio_buffer_size = hdr->audio_frame_size; |
211 | return 0; |
212 | } |
213 | |
214 | /* audio packet */ |
215 | ret = av_get_packet(pb, pkt, cin->audio_buffer_size); |
216 | if (ret < 0) |
217 | return ret; |
218 | |
219 | pkt->stream_index = cin->audio_stream_index; |
220 | pkt->pts = cin->audio_stream_pts; |
221 | pkt->duration = cin->audio_buffer_size - (pkt->pts == 0); |
222 | cin->audio_stream_pts += pkt->duration; |
223 | cin->audio_buffer_size = 0; |
224 | return 0; |
225 | } |
226 | |
227 | AVInputFormat ff_dsicin_demuxer = { |
228 | .name = "dsicin", |
229 | .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN"), |
230 | .priv_data_size = sizeof(CinDemuxContext), |
231 | .read_probe = cin_probe, |
232 | .read_header = cin_read_header, |
233 | .read_packet = cin_read_packet, |
234 | }; |
235 |