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4349 | Serge | 1 | /* |
2 | * RAW demuxers |
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3 | * Copyright (c) 2001 Fabrice Bellard |
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4 | * Copyright (c) 2005 Alex Beregszaszi |
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5 | * |
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6 | * This file is part of FFmpeg. |
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7 | * |
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8 | * FFmpeg is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU Lesser General Public |
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10 | * License as published by the Free Software Foundation; either |
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11 | * version 2.1 of the License, or (at your option) any later version. |
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12 | * |
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13 | * FFmpeg is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | * Lesser General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU Lesser General Public |
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19 | * License along with FFmpeg; if not, write to the Free Software |
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20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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21 | */ |
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22 | |||
23 | #include "avformat.h" |
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24 | #include "internal.h" |
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25 | #include "avio_internal.h" |
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26 | #include "rawdec.h" |
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27 | #include "libavutil/opt.h" |
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28 | #include "libavutil/parseutils.h" |
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29 | #include "libavutil/pixdesc.h" |
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30 | #include "libavutil/avassert.h" |
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31 | |||
32 | #define RAW_PACKET_SIZE 1024 |
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33 | |||
34 | int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt) |
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35 | { |
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36 | int ret, size; |
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37 | |||
38 | size = RAW_PACKET_SIZE; |
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39 | |||
40 | if (av_new_packet(pkt, size) < 0) |
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41 | return AVERROR(ENOMEM); |
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42 | |||
43 | pkt->pos= avio_tell(s->pb); |
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44 | pkt->stream_index = 0; |
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45 | ret = ffio_read_partial(s->pb, pkt->data, size); |
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46 | if (ret < 0) { |
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47 | av_free_packet(pkt); |
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48 | return ret; |
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49 | } |
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50 | av_shrink_packet(pkt, ret); |
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51 | return ret; |
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52 | } |
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53 | |||
54 | int ff_raw_audio_read_header(AVFormatContext *s) |
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55 | { |
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56 | AVStream *st = avformat_new_stream(s, NULL); |
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57 | if (!st) |
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58 | return AVERROR(ENOMEM); |
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59 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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60 | st->codec->codec_id = s->iformat->raw_codec_id; |
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61 | st->need_parsing = AVSTREAM_PARSE_FULL_RAW; |
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62 | st->start_time = 0; |
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63 | /* the parameters will be extracted from the compressed bitstream */ |
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64 | |||
65 | return 0; |
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66 | } |
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67 | |||
68 | /* MPEG-1/H.263 input */ |
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69 | int ff_raw_video_read_header(AVFormatContext *s) |
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70 | { |
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71 | AVStream *st; |
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72 | FFRawVideoDemuxerContext *s1 = s->priv_data; |
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73 | int ret = 0; |
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74 | |||
75 | |||
76 | st = avformat_new_stream(s, NULL); |
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77 | if (!st) { |
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78 | ret = AVERROR(ENOMEM); |
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79 | goto fail; |
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80 | } |
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81 | |||
82 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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83 | st->codec->codec_id = s->iformat->raw_codec_id; |
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84 | st->need_parsing = AVSTREAM_PARSE_FULL_RAW; |
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85 | |||
86 | st->codec->time_base = av_inv_q(s1->framerate); |
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87 | avpriv_set_pts_info(st, 64, 1, 1200000); |
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88 | |||
89 | fail: |
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90 | return ret; |
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91 | } |
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92 | |||
93 | static int ff_raw_data_read_header(AVFormatContext *s) |
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94 | { |
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95 | AVStream *st = avformat_new_stream(s, NULL); |
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96 | if (!st) |
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97 | return AVERROR(ENOMEM); |
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98 | st->codec->codec_type = AVMEDIA_TYPE_DATA; |
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99 | st->codec->codec_id = s->iformat->raw_codec_id; |
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100 | st->start_time = 0; |
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101 | return 0; |
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102 | } |
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103 | |||
104 | /* Note: Do not forget to add new entries to the Makefile as well. */ |
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105 | |||
106 | #define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x) |
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107 | #define DEC AV_OPT_FLAG_DECODING_PARAM |
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108 | const AVOption ff_rawvideo_options[] = { |
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109 | { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC}, |
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110 | { NULL }, |
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111 | }; |
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112 | |||
113 | #if CONFIG_DATA_DEMUXER |
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114 | AVInputFormat ff_data_demuxer = { |
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115 | .name = "data", |
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116 | .long_name = NULL_IF_CONFIG_SMALL("raw data"), |
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117 | .read_header = ff_raw_data_read_header, |
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118 | .read_packet = ff_raw_read_partial_packet, |
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119 | .raw_codec_id = AV_CODEC_ID_NONE, |
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120 | }; |
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121 | #endif |
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122 | |||
123 | #if CONFIG_LATM_DEMUXER |
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124 | AVInputFormat ff_latm_demuxer = { |
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125 | .name = "latm", |
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126 | .long_name = NULL_IF_CONFIG_SMALL("raw LOAS/LATM"), |
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127 | .read_header = ff_raw_audio_read_header, |
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128 | .read_packet = ff_raw_read_partial_packet, |
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129 | .flags = AVFMT_GENERIC_INDEX, |
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130 | .extensions = "latm", |
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131 | .raw_codec_id = AV_CODEC_ID_AAC_LATM, |
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132 | }; |
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133 | #endif |
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134 | |||
135 | #if CONFIG_MJPEG_DEMUXER |
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136 | FF_DEF_RAWVIDEO_DEMUXER(mjpeg, "raw MJPEG video", NULL, "mjpg,mjpeg,mpo", AV_CODEC_ID_MJPEG) |
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137 | #endif |
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138 | |||
139 | #if CONFIG_MLP_DEMUXER |
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140 | AVInputFormat ff_mlp_demuxer = { |
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141 | .name = "mlp", |
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142 | .long_name = NULL_IF_CONFIG_SMALL("raw MLP"), |
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143 | .read_header = ff_raw_audio_read_header, |
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144 | .read_packet = ff_raw_read_partial_packet, |
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145 | .flags = AVFMT_GENERIC_INDEX, |
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146 | .extensions = "mlp", |
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147 | .raw_codec_id = AV_CODEC_ID_MLP, |
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148 | }; |
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149 | #endif |
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150 | |||
151 | #if CONFIG_TRUEHD_DEMUXER |
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152 | AVInputFormat ff_truehd_demuxer = { |
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153 | .name = "truehd", |
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154 | .long_name = NULL_IF_CONFIG_SMALL("raw TrueHD"), |
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155 | .read_header = ff_raw_audio_read_header, |
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156 | .read_packet = ff_raw_read_partial_packet, |
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157 | .flags = AVFMT_GENERIC_INDEX, |
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158 | .extensions = "thd", |
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159 | .raw_codec_id = AV_CODEC_ID_TRUEHD, |
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160 | }; |
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161 | #endif |
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162 | |||
163 | #if CONFIG_SHORTEN_DEMUXER |
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164 | AVInputFormat ff_shorten_demuxer = { |
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165 | .name = "shn", |
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166 | .long_name = NULL_IF_CONFIG_SMALL("raw Shorten"), |
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167 | .read_header = ff_raw_audio_read_header, |
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168 | .read_packet = ff_raw_read_partial_packet, |
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169 | .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK, |
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170 | .extensions = "shn", |
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171 | .raw_codec_id = AV_CODEC_ID_SHORTEN, |
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172 | }; |
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173 | #endif |
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174 | |||
175 | #if CONFIG_VC1_DEMUXER |
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176 | FF_DEF_RAWVIDEO_DEMUXER(vc1, "raw VC-1", NULL, "vc1", AV_CODEC_ID_VC1) |
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177 | #endif>> |