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Rev | Author | Line No. | Line |
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6148 | serge | 1 | /* |
2 | * Delphine Software International CIN File Demuxer |
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3 | * Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net) |
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4 | * |
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5 | * This file is part of FFmpeg. |
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6 | * |
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7 | * FFmpeg is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU Lesser General Public |
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9 | * License as published by the Free Software Foundation; either |
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10 | * version 2.1 of the License, or (at your option) any later version. |
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11 | * |
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12 | * FFmpeg is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | * Lesser General Public License for more details. |
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16 | * |
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17 | * You should have received a copy of the GNU Lesser General Public |
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18 | * License along with FFmpeg; if not, write to the Free Software |
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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20 | */ |
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21 | |||
22 | /** |
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23 | * @file |
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24 | * Delphine Software International CIN file demuxer |
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25 | */ |
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26 | |||
27 | #include "libavutil/channel_layout.h" |
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28 | #include "libavutil/intreadwrite.h" |
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29 | #include "avformat.h" |
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30 | #include "internal.h" |
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31 | #include "avio_internal.h" |
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32 | |||
33 | |||
34 | typedef struct CinFileHeader { |
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35 | int video_frame_size; |
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36 | int video_frame_width; |
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37 | int video_frame_height; |
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38 | int audio_frequency; |
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39 | int audio_bits; |
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40 | int audio_stereo; |
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41 | int audio_frame_size; |
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42 | } CinFileHeader; |
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43 | |||
44 | typedef struct CinFrameHeader { |
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45 | int audio_frame_type; |
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46 | int video_frame_type; |
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47 | int pal_colors_count; |
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48 | int audio_frame_size; |
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49 | int video_frame_size; |
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50 | } CinFrameHeader; |
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51 | |||
52 | typedef struct CinDemuxContext { |
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53 | int audio_stream_index; |
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54 | int video_stream_index; |
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55 | CinFileHeader file_header; |
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56 | int64_t audio_stream_pts; |
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57 | int64_t video_stream_pts; |
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58 | CinFrameHeader frame_header; |
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59 | int audio_buffer_size; |
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60 | } CinDemuxContext; |
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61 | |||
62 | |||
63 | static int cin_probe(AVProbeData *p) |
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64 | { |
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65 | /* header starts with this special marker */ |
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66 | if (AV_RL32(&p->buf[0]) != 0x55AA0000) |
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67 | return 0; |
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68 | |||
69 | /* for accuracy, check some header field values */ |
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70 | if (AV_RL32(&p->buf[12]) != 22050 || p->buf[16] != 16 || p->buf[17] != 0) |
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71 | return 0; |
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72 | |||
73 | return AVPROBE_SCORE_MAX; |
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74 | } |
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75 | |||
76 | static int cin_read_file_header(CinDemuxContext *cin, AVIOContext *pb) { |
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77 | CinFileHeader *hdr = &cin->file_header; |
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78 | |||
79 | if (avio_rl32(pb) != 0x55AA0000) |
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80 | return AVERROR_INVALIDDATA; |
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81 | |||
82 | hdr->video_frame_size = avio_rl32(pb); |
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83 | hdr->video_frame_width = avio_rl16(pb); |
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84 | hdr->video_frame_height = avio_rl16(pb); |
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85 | hdr->audio_frequency = avio_rl32(pb); |
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86 | hdr->audio_bits = avio_r8(pb); |
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87 | hdr->audio_stereo = avio_r8(pb); |
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88 | hdr->audio_frame_size = avio_rl16(pb); |
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89 | |||
90 | if (hdr->audio_frequency != 22050 || hdr->audio_bits != 16 || hdr->audio_stereo != 0) |
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91 | return AVERROR_INVALIDDATA; |
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92 | |||
93 | return 0; |
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94 | } |
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95 | |||
96 | static int cin_read_header(AVFormatContext *s) |
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97 | { |
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98 | int rc; |
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99 | CinDemuxContext *cin = s->priv_data; |
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100 | CinFileHeader *hdr = &cin->file_header; |
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101 | AVIOContext *pb = s->pb; |
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102 | AVStream *st; |
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103 | |||
104 | rc = cin_read_file_header(cin, pb); |
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105 | if (rc) |
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106 | return rc; |
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107 | |||
108 | cin->video_stream_pts = 0; |
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109 | cin->audio_stream_pts = 0; |
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110 | cin->audio_buffer_size = 0; |
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111 | |||
112 | /* initialize the video decoder stream */ |
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113 | st = avformat_new_stream(s, NULL); |
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114 | if (!st) |
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115 | return AVERROR(ENOMEM); |
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116 | |||
117 | avpriv_set_pts_info(st, 32, 1, 12); |
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118 | cin->video_stream_index = st->index; |
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119 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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120 | st->codec->codec_id = AV_CODEC_ID_DSICINVIDEO; |
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121 | st->codec->codec_tag = 0; /* no fourcc */ |
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122 | st->codec->width = hdr->video_frame_width; |
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123 | st->codec->height = hdr->video_frame_height; |
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124 | |||
125 | /* initialize the audio decoder stream */ |
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126 | st = avformat_new_stream(s, NULL); |
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127 | if (!st) |
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128 | return AVERROR(ENOMEM); |
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129 | |||
130 | avpriv_set_pts_info(st, 32, 1, 22050); |
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131 | cin->audio_stream_index = st->index; |
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132 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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133 | st->codec->codec_id = AV_CODEC_ID_DSICINAUDIO; |
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134 | st->codec->codec_tag = 0; /* no tag */ |
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135 | st->codec->channels = 1; |
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136 | st->codec->channel_layout = AV_CH_LAYOUT_MONO; |
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137 | st->codec->sample_rate = 22050; |
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138 | st->codec->bits_per_coded_sample = 8; |
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139 | st->codec->bit_rate = st->codec->sample_rate * st->codec->bits_per_coded_sample * st->codec->channels; |
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140 | |||
141 | return 0; |
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142 | } |
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143 | |||
144 | static int cin_read_frame_header(CinDemuxContext *cin, AVIOContext *pb) { |
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145 | CinFrameHeader *hdr = &cin->frame_header; |
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146 | |||
147 | hdr->video_frame_type = avio_r8(pb); |
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148 | hdr->audio_frame_type = avio_r8(pb); |
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149 | hdr->pal_colors_count = avio_rl16(pb); |
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150 | hdr->video_frame_size = avio_rl32(pb); |
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151 | hdr->audio_frame_size = avio_rl32(pb); |
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152 | |||
153 | if (url_feof(pb) || pb->error) |
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154 | return AVERROR(EIO); |
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155 | |||
156 | if (avio_rl32(pb) != 0xAA55AA55) |
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157 | return AVERROR_INVALIDDATA; |
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158 | if (hdr->video_frame_size < 0 || hdr->audio_frame_size < 0) |
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159 | return AVERROR_INVALIDDATA; |
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160 | |||
161 | return 0; |
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162 | } |
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163 | |||
164 | static int cin_read_packet(AVFormatContext *s, AVPacket *pkt) |
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165 | { |
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166 | CinDemuxContext *cin = s->priv_data; |
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167 | AVIOContext *pb = s->pb; |
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168 | CinFrameHeader *hdr = &cin->frame_header; |
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169 | int rc, palette_type, pkt_size; |
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170 | int ret; |
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171 | |||
172 | if (cin->audio_buffer_size == 0) { |
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173 | rc = cin_read_frame_header(cin, pb); |
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174 | if (rc) |
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175 | return rc; |
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176 | |||
177 | if ((int16_t)hdr->pal_colors_count < 0) { |
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178 | hdr->pal_colors_count = -(int16_t)hdr->pal_colors_count; |
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179 | palette_type = 1; |
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180 | } else { |
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181 | palette_type = 0; |
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182 | } |
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183 | |||
184 | /* palette and video packet */ |
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185 | pkt_size = (palette_type + 3) * hdr->pal_colors_count + hdr->video_frame_size; |
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186 | |||
187 | pkt_size = ffio_limit(pb, pkt_size); |
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188 | |||
189 | ret = av_new_packet(pkt, 4 + pkt_size); |
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190 | if (ret < 0) |
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191 | return ret; |
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192 | |||
193 | pkt->stream_index = cin->video_stream_index; |
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194 | pkt->pts = cin->video_stream_pts++; |
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195 | |||
196 | pkt->data[0] = palette_type; |
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197 | pkt->data[1] = hdr->pal_colors_count & 0xFF; |
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198 | pkt->data[2] = hdr->pal_colors_count >> 8; |
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199 | pkt->data[3] = hdr->video_frame_type; |
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200 | |||
201 | ret = avio_read(pb, &pkt->data[4], pkt_size); |
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202 | if (ret < 0) { |
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203 | av_free_packet(pkt); |
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204 | return ret; |
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205 | } |
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206 | if (ret < pkt_size) |
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207 | av_shrink_packet(pkt, 4 + ret); |
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208 | |||
209 | /* sound buffer will be processed on next read_packet() call */ |
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210 | cin->audio_buffer_size = hdr->audio_frame_size; |
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211 | return 0; |
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212 | } |
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213 | |||
214 | /* audio packet */ |
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215 | ret = av_get_packet(pb, pkt, cin->audio_buffer_size); |
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216 | if (ret < 0) |
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217 | return ret; |
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218 | |||
219 | pkt->stream_index = cin->audio_stream_index; |
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220 | pkt->pts = cin->audio_stream_pts; |
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221 | pkt->duration = cin->audio_buffer_size - (pkt->pts == 0); |
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222 | cin->audio_stream_pts += pkt->duration; |
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223 | cin->audio_buffer_size = 0; |
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224 | return 0; |
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225 | } |
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226 | |||
227 | AVInputFormat ff_dsicin_demuxer = { |
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228 | .name = "dsicin", |
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229 | .long_name = NULL_IF_CONFIG_SMALL("Delphine Software International CIN"), |
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230 | .priv_data_size = sizeof(CinDemuxContext), |
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231 | .read_probe = cin_probe, |
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232 | .read_header = cin_read_header, |
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233 | .read_packet = cin_read_packet, |
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234 | };>>>>>>> |