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00032 #include "libavutil/intreadwrite.h"
00033 #include "libavcodec/iff.h"
00034 #include "avformat.h"
00035
00036 #define ID_8SVX MKTAG('8','S','V','X')
00037 #define ID_VHDR MKTAG('V','H','D','R')
00038 #define ID_ATAK MKTAG('A','T','A','K')
00039 #define ID_RLSE MKTAG('R','L','S','E')
00040 #define ID_CHAN MKTAG('C','H','A','N')
00041 #define ID_PBM MKTAG('P','B','M',' ')
00042 #define ID_ILBM MKTAG('I','L','B','M')
00043 #define ID_BMHD MKTAG('B','M','H','D')
00044 #define ID_CMAP MKTAG('C','M','A','P')
00045
00046 #define ID_FORM MKTAG('F','O','R','M')
00047 #define ID_ANNO MKTAG('A','N','N','O')
00048 #define ID_AUTH MKTAG('A','U','T','H')
00049 #define ID_CHRS MKTAG('C','H','R','S')
00050 #define ID_COPYRIGHT MKTAG('(','c',')',' ')
00051 #define ID_CSET MKTAG('C','S','E','T')
00052 #define ID_FVER MKTAG('F','V','E','R')
00053 #define ID_NAME MKTAG('N','A','M','E')
00054 #define ID_TEXT MKTAG('T','E','X','T')
00055 #define ID_BODY MKTAG('B','O','D','Y')
00056 #define ID_ANNO MKTAG('A','N','N','O')
00057
00058 #define LEFT 2
00059 #define RIGHT 4
00060 #define STEREO 6
00061
00062 #define PACKET_SIZE 1024
00063
00064 typedef enum {
00065 COMP_NONE,
00066 COMP_FIB,
00067 COMP_EXP
00068 } svx8_compression_type;
00069
00070 typedef enum {
00071 BITMAP_RAW,
00072 BITMAP_BYTERUN1
00073 } bitmap_compression_type;
00074
00075 typedef struct {
00076 uint64_t body_pos;
00077 uint32_t body_size;
00078 uint32_t sent_bytes;
00079 uint32_t audio_frame_count;
00080 } IffDemuxContext;
00081
00082
00083 static void interleave_stereo(const uint8_t *src, uint8_t *dest, int size)
00084 {
00085 uint8_t *end = dest + size;
00086 size = size>>1;
00087
00088 while(dest < end) {
00089 *dest++ = *src;
00090 *dest++ = *(src+size);
00091 src++;
00092 }
00093 }
00094
00095 static int iff_probe(AVProbeData *p)
00096 {
00097 const uint8_t *d = p->buf;
00098
00099 if ( AV_RL32(d) == ID_FORM &&
00100 (AV_RL32(d+8) == ID_8SVX || AV_RL32(d+8) == ID_PBM || AV_RL32(d+8) == ID_ILBM) )
00101 return AVPROBE_SCORE_MAX;
00102 return 0;
00103 }
00104
00105 static int iff_read_header(AVFormatContext *s,
00106 AVFormatParameters *ap)
00107 {
00108 IffDemuxContext *iff = s->priv_data;
00109 ByteIOContext *pb = s->pb;
00110 AVStream *st;
00111 uint32_t chunk_id, data_size;
00112 int compression = -1;
00113 char *buf;
00114
00115 st = av_new_stream(s, 0);
00116 if (!st)
00117 return AVERROR(ENOMEM);
00118
00119 st->codec->channels = 1;
00120 url_fskip(pb, 8);
00121
00122 st->codec->codec_tag = get_le32(pb);
00123
00124 while(!url_feof(pb)) {
00125 uint64_t orig_pos;
00126 chunk_id = get_le32(pb);
00127 data_size = get_be32(pb);
00128 orig_pos = url_ftell(pb);
00129
00130 switch(chunk_id) {
00131 case ID_VHDR:
00132 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00133
00134 if (data_size < 14)
00135 return AVERROR_INVALIDDATA;
00136 url_fskip(pb, 12);
00137 st->codec->sample_rate = get_be16(pb);
00138 if (data_size >= 16) {
00139 url_fskip(pb, 1);
00140 compression = get_byte(pb);
00141 }
00142 break;
00143
00144 case ID_BODY:
00145 iff->body_pos = url_ftell(pb);
00146 iff->body_size = data_size;
00147 break;
00148
00149 case ID_CHAN:
00150 if (data_size < 4)
00151 return AVERROR_INVALIDDATA;
00152 st->codec->channels = (get_be32(pb) < 6) ? 1 : 2;
00153 break;
00154
00155 case ID_CMAP:
00156 st->codec->extradata_size = data_size;
00157 st->codec->extradata = av_malloc(data_size);
00158 if (!st->codec->extradata)
00159 return AVERROR(ENOMEM);
00160 if (get_buffer(pb, st->codec->extradata, data_size) < 0)
00161 return AVERROR(EIO);
00162 break;
00163
00164 case ID_BMHD:
00165 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00166 if (data_size <= 8)
00167 return AVERROR_INVALIDDATA;
00168 st->codec->width = get_be16(pb);
00169 st->codec->height = get_be16(pb);
00170 url_fskip(pb, 4);
00171 st->codec->bits_per_coded_sample = get_byte(pb);
00172 if (data_size >= 11) {
00173 url_fskip(pb, 1);
00174 compression = get_byte(pb);
00175 }
00176 if (data_size >= 16) {
00177 url_fskip(pb, 3);
00178 st->sample_aspect_ratio.num = get_byte(pb);
00179 st->sample_aspect_ratio.den = get_byte(pb);
00180 }
00181 break;
00182
00183 case ID_ANNO:
00184 buf = av_malloc(data_size + 1);
00185 if (!buf)
00186 break;
00187 get_buffer(pb, buf, data_size);
00188 buf[data_size] = 0;
00189 av_metadata_set2(&s->metadata, "comment", buf, AV_METADATA_DONT_STRDUP_VAL);
00190 break;
00191 }
00192
00193 url_fskip(pb, data_size - (url_ftell(pb) - orig_pos) + (data_size & 1));
00194 }
00195
00196 url_fseek(pb, iff->body_pos, SEEK_SET);
00197
00198 switch(st->codec->codec_type) {
00199 case AVMEDIA_TYPE_AUDIO:
00200 av_set_pts_info(st, 32, 1, st->codec->sample_rate);
00201
00202 switch(compression) {
00203 case COMP_NONE:
00204 st->codec->codec_id = CODEC_ID_PCM_S8;
00205 break;
00206 case COMP_FIB:
00207 st->codec->codec_id = CODEC_ID_8SVX_FIB;
00208 break;
00209 case COMP_EXP:
00210 st->codec->codec_id = CODEC_ID_8SVX_EXP;
00211 break;
00212 default:
00213 av_log(s, AV_LOG_ERROR, "iff: unknown compression method\n");
00214 return -1;
00215 }
00216
00217 st->codec->bits_per_coded_sample = 8;
00218 st->codec->bit_rate = st->codec->channels * st->codec->sample_rate * st->codec->bits_per_coded_sample;
00219 st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
00220 break;
00221
00222 case AVMEDIA_TYPE_VIDEO:
00223 switch (compression) {
00224 case BITMAP_RAW:
00225 if (st->codec->codec_tag == ID_ILBM) {
00226 st->codec->codec_id = CODEC_ID_IFF_ILBM;
00227 } else {
00228 st->codec->codec_id = CODEC_ID_RAWVIDEO;
00229 st->codec->pix_fmt = PIX_FMT_PAL8;
00230 st->codec->codec_tag = 0;
00231 }
00232 break;
00233 case BITMAP_BYTERUN1:
00234 st->codec->codec_id = CODEC_ID_IFF_BYTERUN1;
00235 break;
00236 default:
00237 av_log(s, AV_LOG_ERROR, "unknown compression method\n");
00238 return AVERROR_INVALIDDATA;
00239 }
00240 break;
00241 default:
00242 return -1;
00243 }
00244
00245 return 0;
00246 }
00247
00248 static int iff_read_packet(AVFormatContext *s,
00249 AVPacket *pkt)
00250 {
00251 IffDemuxContext *iff = s->priv_data;
00252 ByteIOContext *pb = s->pb;
00253 AVStream *st = s->streams[0];
00254 int ret;
00255
00256 if(iff->sent_bytes >= iff->body_size)
00257 return AVERROR(EIO);
00258
00259 if(s->streams[0]->codec->channels == 2) {
00260 uint8_t sample_buffer[PACKET_SIZE];
00261
00262 ret = get_buffer(pb, sample_buffer, PACKET_SIZE);
00263 if(av_new_packet(pkt, PACKET_SIZE) < 0) {
00264 av_log(s, AV_LOG_ERROR, "iff: cannot allocate packet \n");
00265 return AVERROR(ENOMEM);
00266 }
00267 interleave_stereo(sample_buffer, pkt->data, PACKET_SIZE);
00268 } else if (s->streams[0]->codec->codec_id == CODEC_ID_RAWVIDEO) {
00269 if(av_new_packet(pkt, iff->body_size + AVPALETTE_SIZE) < 0) {
00270 return AVERROR(ENOMEM);
00271 }
00272
00273 ret = ff_cmap_read_palette(st->codec, (uint32_t*)(pkt->data + iff->body_size));
00274 if (ret < 0)
00275 return ret;
00276 av_freep(&st->codec->extradata);
00277 st->codec->extradata_size = 0;
00278
00279 ret = get_buffer(pb, pkt->data, iff->body_size);
00280 } else if (s->streams[0]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00281 ret = av_get_packet(pb, pkt, iff->body_size);
00282 } else {
00283 ret = av_get_packet(pb, pkt, PACKET_SIZE);
00284 }
00285
00286 if(iff->sent_bytes == 0)
00287 pkt->flags |= AV_PKT_FLAG_KEY;
00288
00289 if(s->streams[0]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00290 iff->sent_bytes += PACKET_SIZE;
00291 } else {
00292 iff->sent_bytes = iff->body_size;
00293 }
00294 pkt->stream_index = 0;
00295 if(s->streams[0]->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00296 pkt->pts = iff->audio_frame_count;
00297 iff->audio_frame_count += ret / s->streams[0]->codec->channels;
00298 }
00299 return ret;
00300 }
00301
00302 AVInputFormat iff_demuxer = {
00303 "IFF",
00304 NULL_IF_CONFIG_SMALL("IFF format"),
00305 sizeof(IffDemuxContext),
00306 iff_probe,
00307 iff_read_header,
00308 iff_read_packet,
00309 };
