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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 if (data_size < 3 || data_size > 768 || data_size % 3) {
00163 av_log(s, AV_LOG_ERROR, "Invalid CMAP chunk size %d\n",
00164 data_size);
00165 return AVERROR_INVALIDDATA;
00166 }
00167 st->codec->extradata_size = data_size;
00168 st->codec->extradata = av_malloc(data_size);
00169 if (!st->codec->extradata)
00170 return AVERROR(ENOMEM);
00171 if (avio_read(pb, st->codec->extradata, data_size) < 0)
00172 return AVERROR(EIO);
00173 break;
00174
00175 case ID_BMHD:
00176 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00177 if (data_size <= 8)
00178 return AVERROR_INVALIDDATA;
00179 st->codec->width = avio_rb16(pb);
00180 st->codec->height = avio_rb16(pb);
00181 avio_skip(pb, 4);
00182 st->codec->bits_per_coded_sample = avio_r8(pb);
00183 if (data_size >= 11) {
00184 avio_skip(pb, 1);
00185 compression = avio_r8(pb);
00186 }
00187 if (data_size >= 16) {
00188 avio_skip(pb, 3);
00189 st->sample_aspect_ratio.num = avio_r8(pb);
00190 st->sample_aspect_ratio.den = avio_r8(pb);
00191 }
00192 break;
00193
00194 case ID_ANNO:
00195 case ID_TEXT:
00196 metadata_tag = "comment";
00197 break;
00198
00199 case ID_AUTH:
00200 metadata_tag = "artist";
00201 break;
00202
00203 case ID_COPYRIGHT:
00204 metadata_tag = "copyright";
00205 break;
00206
00207 case ID_NAME:
00208 metadata_tag = "title";
00209 break;
00210 }
00211
00212 if (metadata_tag) {
00213 if ((res = get_metadata(s, metadata_tag, data_size)) < 0) {
00214 av_log(s, AV_LOG_ERROR, "cannot allocate metadata tag %s!", metadata_tag);
00215 return res;
00216 }
00217 }
00218 avio_skip(pb, data_size - (avio_tell(pb) - orig_pos) + (data_size & 1));
00219 }
00220
00221 avio_seek(pb, iff->body_pos, SEEK_SET);
00222
00223 switch(st->codec->codec_type) {
00224 case AVMEDIA_TYPE_AUDIO:
00225 avpriv_set_pts_info(st, 32, 1, st->codec->sample_rate);
00226
00227 switch(compression) {
00228 case COMP_NONE:
00229 st->codec->codec_id = CODEC_ID_PCM_S8_PLANAR;
00230 break;
00231 case COMP_FIB:
00232 st->codec->codec_id = CODEC_ID_8SVX_FIB;
00233 break;
00234 case COMP_EXP:
00235 st->codec->codec_id = CODEC_ID_8SVX_EXP;
00236 break;
00237 default:
00238 av_log(s, AV_LOG_ERROR, "unknown compression method\n");
00239 return -1;
00240 }
00241
00242 st->codec->bits_per_coded_sample = 8;
00243 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample;
00244 st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
00245 break;
00246
00247 case AVMEDIA_TYPE_VIDEO:
00248 switch (compression) {
00249 case BITMAP_RAW:
00250 st->codec->codec_id = CODEC_ID_IFF_ILBM;
00251 break;
00252 case BITMAP_BYTERUN1:
00253 st->codec->codec_id = CODEC_ID_IFF_BYTERUN1;
00254 break;
00255 default:
00256 av_log(s, AV_LOG_ERROR, "unknown compression method\n");
00257 return AVERROR_INVALIDDATA;
00258 }
00259 break;
00260 default:
00261 return -1;
00262 }
00263
00264 return 0;
00265 }
00266
00267 static int iff_read_packet(AVFormatContext *s,
00268 AVPacket *pkt)
00269 {
00270 IffDemuxContext *iff = s->priv_data;
00271 AVIOContext *pb = s->pb;
00272 int ret;
00273
00274 if(iff->sent_bytes >= iff->body_size)
00275 return AVERROR_EOF;
00276
00277 ret = av_get_packet(pb, pkt, iff->body_size);
00278 if (ret < 0)
00279 return ret;
00280
00281 if(iff->sent_bytes == 0)
00282 pkt->flags |= AV_PKT_FLAG_KEY;
00283 iff->sent_bytes = iff->body_size;
00284
00285 pkt->stream_index = 0;
00286 return ret;
00287 }
00288
00289 AVInputFormat ff_iff_demuxer = {
00290 .name = "IFF",
00291 .long_name = NULL_IF_CONFIG_SMALL("IFF format"),
00292 .priv_data_size = sizeof(IffDemuxContext),
00293 .read_probe = iff_probe,
00294 .read_header = iff_read_header,
00295 .read_packet = iff_read_packet,
00296 };