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00032 #include "libavutil/intreadwrite.h"
00033 #include "libavutil/dict.h"
00034 #include "avformat.h"
00035 #include "internal.h"
00036
00037 #define ID_8SVX MKTAG('8','S','V','X')
00038 #define ID_VHDR MKTAG('V','H','D','R')
00039 #define ID_ATAK MKTAG('A','T','A','K')
00040 #define ID_RLSE MKTAG('R','L','S','E')
00041 #define ID_CHAN MKTAG('C','H','A','N')
00042 #define ID_PBM MKTAG('P','B','M',' ')
00043 #define ID_ILBM MKTAG('I','L','B','M')
00044 #define ID_BMHD MKTAG('B','M','H','D')
00045 #define ID_CMAP MKTAG('C','M','A','P')
00046
00047 #define ID_FORM MKTAG('F','O','R','M')
00048 #define ID_ANNO MKTAG('A','N','N','O')
00049 #define ID_AUTH MKTAG('A','U','T','H')
00050 #define ID_CHRS MKTAG('C','H','R','S')
00051 #define ID_COPYRIGHT MKTAG('(','c',')',' ')
00052 #define ID_CSET MKTAG('C','S','E','T')
00053 #define ID_FVER MKTAG('F','V','E','R')
00054 #define ID_NAME MKTAG('N','A','M','E')
00055 #define ID_TEXT MKTAG('T','E','X','T')
00056 #define ID_BODY MKTAG('B','O','D','Y')
00057 #define ID_ANNO MKTAG('A','N','N','O')
00058
00059 #define LEFT 2
00060 #define RIGHT 4
00061 #define STEREO 6
00062
00063 typedef enum {
00064 COMP_NONE,
00065 COMP_FIB,
00066 COMP_EXP
00067 } svx8_compression_type;
00068
00069 typedef enum {
00070 BITMAP_RAW,
00071 BITMAP_BYTERUN1
00072 } bitmap_compression_type;
00073
00074 typedef struct {
00075 uint64_t body_pos;
00076 uint32_t body_size;
00077 uint32_t sent_bytes;
00078 } IffDemuxContext;
00079
00080
00081
00082 static int get_metadata(AVFormatContext *s,
00083 const char *const tag,
00084 const unsigned data_size)
00085 {
00086 uint8_t *buf = ((data_size + 1) == 0) ? NULL : av_malloc(data_size + 1);
00087
00088 if (!buf)
00089 return AVERROR(ENOMEM);
00090
00091 if (avio_read(s->pb, buf, data_size) < 0) {
00092 av_free(buf);
00093 return AVERROR(EIO);
00094 }
00095 buf[data_size] = 0;
00096 av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
00097 return 0;
00098 }
00099
00100 static int iff_probe(AVProbeData *p)
00101 {
00102 const uint8_t *d = p->buf;
00103
00104 if ( AV_RL32(d) == ID_FORM &&
00105 (AV_RL32(d+8) == ID_8SVX || AV_RL32(d+8) == ID_PBM || AV_RL32(d+8) == ID_ILBM) )
00106 return AVPROBE_SCORE_MAX;
00107 return 0;
00108 }
00109
00110 static int iff_read_header(AVFormatContext *s,
00111 AVFormatParameters *ap)
00112 {
00113 IffDemuxContext *iff = s->priv_data;
00114 AVIOContext *pb = s->pb;
00115 AVStream *st;
00116 uint32_t chunk_id, data_size;
00117 int compression = -1;
00118
00119 st = avformat_new_stream(s, NULL);
00120 if (!st)
00121 return AVERROR(ENOMEM);
00122
00123 st->codec->channels = 1;
00124 avio_skip(pb, 8);
00125
00126 st->codec->codec_tag = avio_rl32(pb);
00127
00128 while(!pb->eof_reached) {
00129 uint64_t orig_pos;
00130 int res;
00131 const char *metadata_tag = NULL;
00132 chunk_id = avio_rl32(pb);
00133 data_size = avio_rb32(pb);
00134 orig_pos = avio_tell(pb);
00135
00136 switch(chunk_id) {
00137 case ID_VHDR:
00138 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00139
00140 if (data_size < 14)
00141 return AVERROR_INVALIDDATA;
00142 avio_skip(pb, 12);
00143 st->codec->sample_rate = avio_rb16(pb);
00144 if (data_size >= 16) {
00145 avio_skip(pb, 1);
00146 compression = avio_r8(pb);
00147 }
00148 break;
00149
00150 case ID_BODY:
00151 iff->body_pos = avio_tell(pb);
00152 iff->body_size = data_size;
00153 break;
00154
00155 case ID_CHAN:
00156 if (data_size < 4)
00157 return AVERROR_INVALIDDATA;
00158 st->codec->channels = (avio_rb32(pb) < 6) ? 1 : 2;
00159 break;
00160
00161 case ID_CMAP:
00162 st->codec->extradata_size = data_size;
00163 st->codec->extradata = av_malloc(data_size);
00164 if (!st->codec->extradata)
00165 return AVERROR(ENOMEM);
00166 if (avio_read(pb, st->codec->extradata, data_size) < 0)
00167 return AVERROR(EIO);
00168 break;
00169
00170 case ID_BMHD:
00171 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00172 if (data_size <= 8)
00173 return AVERROR_INVALIDDATA;
00174 st->codec->width = avio_rb16(pb);
00175 st->codec->height = avio_rb16(pb);
00176 avio_skip(pb, 4);
00177 st->codec->bits_per_coded_sample = avio_r8(pb);
00178 if (data_size >= 11) {
00179 avio_skip(pb, 1);
00180 compression = avio_r8(pb);
00181 }
00182 if (data_size >= 16) {
00183 avio_skip(pb, 3);
00184 st->sample_aspect_ratio.num = avio_r8(pb);
00185 st->sample_aspect_ratio.den = avio_r8(pb);
00186 }
00187 break;
00188
00189 case ID_ANNO:
00190 case ID_TEXT:
00191 metadata_tag = "comment";
00192 break;
00193
00194 case ID_AUTH:
00195 metadata_tag = "artist";
00196 break;
00197
00198 case ID_COPYRIGHT:
00199 metadata_tag = "copyright";
00200 break;
00201
00202 case ID_NAME:
00203 metadata_tag = "title";
00204 break;
00205 }
00206
00207 if (metadata_tag) {
00208 if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
00209 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!", metadata_tag);
00210 return res;
00211 }
00212 }
00213 avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
00214 }
00215
00216 avio_seek(pb, iff->body_pos, SEEK_SET);
00217
00218 switch(st->codec->codec_type) {
00219 case AVMEDIA_TYPE_AUDIO:
00220 avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
00221
00222 switch(compression) {
00223 case COMP_NONE:
00224 st->codec->codec_id = CODEC_ID_PCM_S8_PLANAR;
00225 break;
00226 case COMP_FIB:
00227 st->codec->codec_id = CODEC_ID_8SVX_FIB;
00228 break;
00229 case COMP_EXP:
00230 st->codec->codec_id = CODEC_ID_8SVX_EXP;
00231 break;
00232 default:
00233 av_log(s, AV_LOG_ERROR, "unknown compression method\n");
00234 return -1;
00235 }
00236
00237 st->codec->bits_per_coded_sample = 8;
00238 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample;
00239 st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
00240 break;
00241
00242 case AVMEDIA_TYPE_VIDEO:
00243 switch (compression) {
00244 case BITMAP_RAW:
00245 st->codec->codec_id = CODEC_ID_IFF_ILBM;
00246 break;
00247 case BITMAP_BYTERUN1:
00248 st->codec->codec_id = CODEC_ID_IFF_BYTERUN1;
00249 break;
00250 default:
00251 av_log(s, AV_LOG_ERROR, "unknown compression method\n");
00252 return AVERROR_INVALIDDATA;
00253 }
00254 break;
00255 default:
00256 return -1;
00257 }
00258
00259 return 0;
00260 }
00261
00262 static int iff_read_packet(AVFormatContext *s,
00263 AVPacket *pkt)
00264 {
00265 IffDemuxContext *iff = s->priv_data;
00266 AVIOContext *pb = s->pb;
00267 int ret;
00268
00269 if(iff->sent_bytes >= iff->body_size)
00270 return AVERROR_EOF;
00271
00272 ret = av_get_packet(pb, pkt, iff->body_size);
00273 if (ret < 0)
00274 return ret;
00275
00276 if(iff->sent_bytes == 0)
00277 pkt->flags |= AV_PKT_FLAG_KEY;
00278 iff->sent_bytes = iff->body_size;
00279
00280 pkt->stream_index = 0;
00281 return ret;
00282 }
00283
00284 AVInputFormat ff_iff_demuxer = {
00285 .name = "IFF",
00286 .long_name = NULL_IF_CONFIG_SMALL("IFF format"),
00287 .priv_data_size = sizeof(IffDemuxContext),
00288 .read_probe = iff_probe,
00289 .read_header = iff_read_header,
00290 .read_packet = iff_read_packet,
00291 };