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00022 #include "libavutil/avstring.h"
00023 #include "libavutil/intreadwrite.h"
00024 #include "libavutil/dict.h"
00025 #include "avformat.h"
00026 #include "internal.h"
00027 #include "riff.h"
00028 #include "rm.h"
00029
00030 #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r') ///< interleaving for Cooker/Atrac
00031 #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0') ///< no interleaving needed
00032 #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4') ///< interleaving for 28.8
00033 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r') ///< interleaving for Sipro
00034 #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f') ///< VBR case for AAC
00035 #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's') ///< VBR case for AAC
00036
00037 struct RMStream {
00038 AVPacket pkt;
00039 int videobufsize;
00040 int videobufpos;
00041 int curpic_num;
00042 int cur_slice, slices;
00043 int64_t pktpos;
00044
00045 int64_t audiotimestamp;
00046 int sub_packet_cnt;
00047 int sub_packet_size, sub_packet_h, coded_framesize;
00048 int audio_framesize;
00049 int sub_packet_lengths[16];
00050 int32_t deint_id;
00051 };
00052
00053 typedef struct {
00054 int nb_packets;
00055 int old_format;
00056 int current_stream;
00057 int remaining_len;
00058 int audio_stream_num;
00059 int audio_pkt_cnt;
00060 } RMDemuxContext;
00061
00062 static const unsigned char sipr_swaps[38][2] = {
00063 { 0, 63 }, { 1, 22 }, { 2, 44 }, { 3, 90 },
00064 { 5, 81 }, { 7, 31 }, { 8, 86 }, { 9, 58 },
00065 { 10, 36 }, { 12, 68 }, { 13, 39 }, { 14, 73 },
00066 { 15, 53 }, { 16, 69 }, { 17, 57 }, { 19, 88 },
00067 { 20, 34 }, { 21, 71 }, { 24, 46 }, { 25, 94 },
00068 { 26, 54 }, { 28, 75 }, { 29, 50 }, { 32, 70 },
00069 { 33, 92 }, { 35, 74 }, { 38, 85 }, { 40, 56 },
00070 { 42, 87 }, { 43, 65 }, { 45, 59 }, { 48, 79 },
00071 { 49, 93 }, { 51, 89 }, { 55, 95 }, { 61, 76 },
00072 { 67, 83 }, { 77, 80 }
00073 };
00074
00075 const unsigned char ff_sipr_subpk_size[4] = { 29, 19, 37, 20 };
00076
00077 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
00078 {
00079 int i;
00080 char *q, r;
00081
00082 q = buf;
00083 for(i=0;i<len;i++) {
00084 r = avio_r8(pb);
00085 if (i < buf_size - 1)
00086 *q++ = r;
00087 }
00088 if (buf_size > 0) *q = '\0';
00089 }
00090
00091 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
00092 {
00093 get_strl(pb, buf, buf_size, avio_r8(pb));
00094 }
00095
00096 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
00097 {
00098 if (size >= 1<<24)
00099 return -1;
00100 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
00101 if (!avctx->extradata)
00102 return AVERROR(ENOMEM);
00103 avctx->extradata_size = avio_read(pb, avctx->extradata, size);
00104 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
00105 if (avctx->extradata_size != size)
00106 return AVERROR(EIO);
00107 return 0;
00108 }
00109
00110 static void rm_read_metadata(AVFormatContext *s, AVIOContext *pb, int wide)
00111 {
00112 char buf[1024];
00113 int i;
00114 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
00115 int len = wide ? avio_rb16(pb) : avio_r8(pb);
00116 get_strl(pb, buf, sizeof(buf), len);
00117 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
00118 }
00119 }
00120
00121 RMStream *ff_rm_alloc_rmstream (void)
00122 {
00123 RMStream *rms = av_mallocz(sizeof(RMStream));
00124 rms->curpic_num = -1;
00125 return rms;
00126 }
00127
00128 void ff_rm_free_rmstream (RMStream *rms)
00129 {
00130 av_free_packet(&rms->pkt);
00131 }
00132
00133 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
00134 AVStream *st, RMStream *ast, int read_all)
00135 {
00136 char buf[256];
00137 uint32_t version;
00138 int ret;
00139
00140
00141 version = avio_rb16(pb);
00142 if (version == 3) {
00143 int header_size = avio_rb16(pb);
00144 int64_t startpos = avio_tell(pb);
00145 avio_skip(pb, 14);
00146 rm_read_metadata(s, pb, 0);
00147 if ((startpos + header_size) >= avio_tell(pb) + 2) {
00148
00149 avio_r8(pb);
00150 get_str8(pb, buf, sizeof(buf));
00151 }
00152
00153 if ((startpos + header_size) > avio_tell(pb))
00154 avio_skip(pb, header_size + startpos - avio_tell(pb));
00155 st->codec->sample_rate = 8000;
00156 st->codec->channels = 1;
00157 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00158 st->codec->codec_id = CODEC_ID_RA_144;
00159 ast->deint_id = DEINT_ID_INT0;
00160 } else {
00161 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
00162 int codecdata_length;
00163
00164 avio_skip(pb, 2);
00165 avio_rb32(pb);
00166 avio_rb32(pb);
00167 avio_rb16(pb);
00168 avio_rb32(pb);
00169 flavor= avio_rb16(pb);
00170 ast->coded_framesize = coded_framesize = avio_rb32(pb);
00171 avio_rb32(pb);
00172 avio_rb32(pb);
00173 avio_rb32(pb);
00174 ast->sub_packet_h = sub_packet_h = avio_rb16(pb);
00175 st->codec->block_align= avio_rb16(pb);
00176 ast->sub_packet_size = sub_packet_size = avio_rb16(pb);
00177 avio_rb16(pb);
00178 if (version == 5) {
00179 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
00180 }
00181 st->codec->sample_rate = avio_rb16(pb);
00182 avio_rb32(pb);
00183 st->codec->channels = avio_rb16(pb);
00184 if (version == 5) {
00185 ast->deint_id = avio_rl32(pb);
00186 avio_read(pb, buf, 4);
00187 buf[4] = 0;
00188 } else {
00189 get_str8(pb, buf, sizeof(buf));
00190 ast->deint_id = AV_RL32(buf);
00191 get_str8(pb, buf, sizeof(buf));
00192 }
00193 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00194 st->codec->codec_tag = AV_RL32(buf);
00195 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
00196 st->codec->codec_tag);
00197
00198 switch (st->codec->codec_id) {
00199 case CODEC_ID_AC3:
00200 st->need_parsing = AVSTREAM_PARSE_FULL;
00201 break;
00202 case CODEC_ID_RA_288:
00203 st->codec->extradata_size= 0;
00204 ast->audio_framesize = st->codec->block_align;
00205 st->codec->block_align = coded_framesize;
00206 break;
00207 case CODEC_ID_COOK:
00208 case CODEC_ID_ATRAC3:
00209 case CODEC_ID_SIPR:
00210 avio_rb16(pb); avio_r8(pb);
00211 if (version == 5)
00212 avio_r8(pb);
00213 codecdata_length = avio_rb32(pb);
00214 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
00215 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
00216 return -1;
00217 }
00218
00219 ast->audio_framesize = st->codec->block_align;
00220 if (st->codec->codec_id == CODEC_ID_SIPR) {
00221 if (flavor > 3) {
00222 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
00223 flavor);
00224 return -1;
00225 }
00226 st->codec->block_align = ff_sipr_subpk_size[flavor];
00227 } else {
00228 if(sub_packet_size <= 0){
00229 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
00230 return -1;
00231 }
00232 st->codec->block_align = ast->sub_packet_size;
00233 }
00234 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
00235 return ret;
00236 break;
00237 case CODEC_ID_AAC:
00238 avio_rb16(pb); avio_r8(pb);
00239 if (version == 5)
00240 avio_r8(pb);
00241 codecdata_length = avio_rb32(pb);
00242 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
00243 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
00244 return -1;
00245 }
00246 if (codecdata_length >= 1) {
00247 avio_r8(pb);
00248 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
00249 return ret;
00250 }
00251 break;
00252 default:
00253 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
00254 }
00255 if (ast->deint_id == DEINT_ID_INT4 ||
00256 ast->deint_id == DEINT_ID_GENR ||
00257 ast->deint_id == DEINT_ID_SIPR) {
00258 if (st->codec->block_align <= 0 ||
00259 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
00260 ast->audio_framesize * sub_packet_h < st->codec->block_align)
00261 return AVERROR_INVALIDDATA;
00262 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
00263 return AVERROR(ENOMEM);
00264 }
00265 switch (ast->deint_id) {
00266 case DEINT_ID_INT4:
00267 if (ast->coded_framesize > ast->audio_framesize ||
00268 sub_packet_h <= 1 ||
00269 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
00270 return AVERROR_INVALIDDATA;
00271 break;
00272 case DEINT_ID_GENR:
00273 if (ast->sub_packet_size <= 0 ||
00274 ast->sub_packet_size > ast->audio_framesize)
00275 return AVERROR_INVALIDDATA;
00276 break;
00277 case DEINT_ID_SIPR:
00278 case DEINT_ID_INT0:
00279 case DEINT_ID_VBRS:
00280 case DEINT_ID_VBRF:
00281 break;
00282 default:
00283 av_log(NULL,0,"Unknown interleaver %X\n", ast->deint_id);
00284 return AVERROR_INVALIDDATA;
00285 }
00286
00287 if (read_all) {
00288 avio_r8(pb);
00289 avio_r8(pb);
00290 avio_r8(pb);
00291 rm_read_metadata(s, pb, 0);
00292 }
00293 }
00294 return 0;
00295 }
00296
00297 int
00298 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
00299 AVStream *st, RMStream *rst, int codec_data_size)
00300 {
00301 unsigned int v;
00302 int size;
00303 int64_t codec_pos;
00304 int ret;
00305
00306 avpriv_set_pts_info(st, 64, 1, 1000);
00307 codec_pos = avio_tell(pb);
00308 v = avio_rb32(pb);
00309 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
00310
00311 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
00312 return -1;
00313 } else {
00314 int fps;
00315 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
00316 fail1:
00317 av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
00318 goto skip;
00319 }
00320 st->codec->codec_tag = avio_rl32(pb);
00321 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
00322 st->codec->codec_tag);
00323
00324 if (st->codec->codec_id == CODEC_ID_NONE)
00325 goto fail1;
00326 st->codec->width = avio_rb16(pb);
00327 st->codec->height = avio_rb16(pb);
00328 avio_skip(pb, 2);
00329 avio_skip(pb, 4);
00330 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00331 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
00332 fps = avio_rb32(pb);
00333
00334 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
00335 return ret;
00336
00337 if (fps > 0) {
00338 av_reduce(&st->r_frame_rate.den, &st->r_frame_rate.num,
00339 0x10000, fps, (1 << 30) - 1);
00340 } else if (s->error_recognition & AV_EF_EXPLODE) {
00341 av_log(s, AV_LOG_ERROR, "Invalid framerate\n");
00342 return AVERROR_INVALIDDATA;
00343 }
00344 st->avg_frame_rate = st->r_frame_rate;
00345 }
00346
00347 skip:
00348
00349 size = avio_tell(pb) - codec_pos;
00350 avio_skip(pb, codec_data_size - size);
00351
00352 return 0;
00353 }
00354
00357 static int rm_read_index(AVFormatContext *s)
00358 {
00359 AVIOContext *pb = s->pb;
00360 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
00361 AVStream *st;
00362
00363 do {
00364 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
00365 return -1;
00366 size = avio_rb32(pb);
00367 if (size < 20)
00368 return -1;
00369 avio_skip(pb, 2);
00370 n_pkts = avio_rb32(pb);
00371 str_id = avio_rb16(pb);
00372 next_off = avio_rb32(pb);
00373 for (n = 0; n < s->nb_streams; n++)
00374 if (s->streams[n]->id == str_id) {
00375 st = s->streams[n];
00376 break;
00377 }
00378 if (n == s->nb_streams) {
00379 av_log(s, AV_LOG_ERROR,
00380 "Invalid stream index %d for index at pos %"PRId64"\n",
00381 str_id, avio_tell(pb));
00382 goto skip;
00383 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
00384 av_log(s, AV_LOG_ERROR,
00385 "Nr. of packets in packet index for stream index %d "
00386 "exceeds filesize (%"PRId64" at %"PRId64" = %d)\n",
00387 str_id, avio_size(pb), avio_tell(pb),
00388 (avio_size(pb) - avio_tell(pb)) / 14);
00389 goto skip;
00390 }
00391
00392 for (n = 0; n < n_pkts; n++) {
00393 avio_skip(pb, 2);
00394 pts = avio_rb32(pb);
00395 pos = avio_rb32(pb);
00396 avio_skip(pb, 4);
00397
00398 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
00399 }
00400
00401 skip:
00402 if (next_off && avio_tell(pb) < next_off &&
00403 avio_seek(pb, next_off, SEEK_SET) < 0) {
00404 av_log(s, AV_LOG_ERROR,
00405 "Non-linear index detected, not supported\n");
00406 return -1;
00407 }
00408 } while (next_off);
00409
00410 return 0;
00411 }
00412
00413 static int rm_read_header_old(AVFormatContext *s)
00414 {
00415 RMDemuxContext *rm = s->priv_data;
00416 AVStream *st;
00417
00418 rm->old_format = 1;
00419 st = avformat_new_stream(s, NULL);
00420 if (!st)
00421 return -1;
00422 st->priv_data = ff_rm_alloc_rmstream();
00423 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
00424 }
00425
00426 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
00427 {
00428 RMDemuxContext *rm = s->priv_data;
00429 AVStream *st;
00430 AVIOContext *pb = s->pb;
00431 unsigned int tag;
00432 int tag_size;
00433 unsigned int start_time, duration;
00434 unsigned int data_off = 0, indx_off = 0;
00435 char buf[128];
00436 int flags = 0;
00437
00438 tag = avio_rl32(pb);
00439 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
00440
00441 return rm_read_header_old(s);
00442 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
00443 return AVERROR(EIO);
00444 }
00445
00446 avio_rb32(pb);
00447 avio_rb16(pb);
00448 avio_rb32(pb);
00449 avio_rb32(pb);
00450
00451 for(;;) {
00452 if (pb->eof_reached)
00453 return -1;
00454 tag = avio_rl32(pb);
00455 tag_size = avio_rb32(pb);
00456 avio_rb16(pb);
00457 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
00458 (tag ) & 0xff,
00459 (tag >> 8) & 0xff,
00460 (tag >> 16) & 0xff,
00461 (tag >> 24) & 0xff,
00462 tag,
00463 tag_size);
00464 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
00465 return -1;
00466 switch(tag) {
00467 case MKTAG('P', 'R', 'O', 'P'):
00468
00469 avio_rb32(pb);
00470 avio_rb32(pb);
00471 avio_rb32(pb);
00472 avio_rb32(pb);
00473 avio_rb32(pb);
00474 avio_rb32(pb);
00475 avio_rb32(pb);
00476 indx_off = avio_rb32(pb);
00477 data_off = avio_rb32(pb);
00478 avio_rb16(pb);
00479 flags = avio_rb16(pb);
00480 break;
00481 case MKTAG('C', 'O', 'N', 'T'):
00482 rm_read_metadata(s, pb, 1);
00483 break;
00484 case MKTAG('M', 'D', 'P', 'R'):
00485 st = avformat_new_stream(s, NULL);
00486 if (!st)
00487 return AVERROR(ENOMEM);
00488 st->id = avio_rb16(pb);
00489 avio_rb32(pb);
00490 st->codec->bit_rate = avio_rb32(pb);
00491 avio_rb32(pb);
00492 avio_rb32(pb);
00493 start_time = avio_rb32(pb);
00494 avio_rb32(pb);
00495 duration = avio_rb32(pb);
00496 st->start_time = start_time;
00497 st->duration = duration;
00498 get_str8(pb, buf, sizeof(buf));
00499 get_str8(pb, buf, sizeof(buf));
00500 st->codec->codec_type = AVMEDIA_TYPE_DATA;
00501 st->priv_data = ff_rm_alloc_rmstream();
00502 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
00503 avio_rb32(pb)) < 0)
00504 return -1;
00505 break;
00506 case MKTAG('D', 'A', 'T', 'A'):
00507 goto header_end;
00508 default:
00509
00510 avio_skip(pb, tag_size - 10);
00511 break;
00512 }
00513 }
00514 header_end:
00515 rm->nb_packets = avio_rb32(pb);
00516 if (!rm->nb_packets && (flags & 4))
00517 rm->nb_packets = 3600 * 25;
00518 avio_rb32(pb);
00519
00520 if (!data_off)
00521 data_off = avio_tell(pb) - 18;
00522 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
00523 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
00524 rm_read_index(s);
00525 avio_seek(pb, data_off + 18, SEEK_SET);
00526 }
00527
00528 return 0;
00529 }
00530
00531 static int get_num(AVIOContext *pb, int *len)
00532 {
00533 int n, n1;
00534
00535 n = avio_rb16(pb);
00536 (*len)-=2;
00537 n &= 0x7FFF;
00538 if (n >= 0x4000) {
00539 return n - 0x4000;
00540 } else {
00541 n1 = avio_rb16(pb);
00542 (*len)-=2;
00543 return (n << 16) | n1;
00544 }
00545 }
00546
00547
00548 #define RAW_PACKET_SIZE 1000
00549
00550 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
00551 RMDemuxContext *rm = s->priv_data;
00552 AVIOContext *pb = s->pb;
00553 AVStream *st;
00554 uint32_t state=0xFFFFFFFF;
00555
00556 while(!pb->eof_reached){
00557 int len, num, i;
00558 *pos= avio_tell(pb) - 3;
00559 if(rm->remaining_len > 0){
00560 num= rm->current_stream;
00561 len= rm->remaining_len;
00562 *timestamp = AV_NOPTS_VALUE;
00563 *flags= 0;
00564 }else{
00565 state= (state<<8) + avio_r8(pb);
00566
00567 if(state == MKBETAG('I', 'N', 'D', 'X')){
00568 int n_pkts, expected_len;
00569 len = avio_rb32(pb);
00570 avio_skip(pb, 2);
00571 n_pkts = avio_rb32(pb);
00572 expected_len = 20 + n_pkts * 14;
00573 if (len == 20)
00574
00575 len = expected_len;
00576 else if (len != expected_len)
00577 av_log(s, AV_LOG_WARNING,
00578 "Index size %d (%d pkts) is wrong, should be %d.\n",
00579 len, n_pkts, expected_len);
00580 len -= 14;
00581 if(len<0)
00582 continue;
00583 goto skip;
00584 } else if (state == MKBETAG('D','A','T','A')) {
00585 av_log(s, AV_LOG_WARNING,
00586 "DATA tag in middle of chunk, file may be broken.\n");
00587 }
00588
00589 if(state > (unsigned)0xFFFF || state <= 12)
00590 continue;
00591 len=state - 12;
00592 state= 0xFFFFFFFF;
00593
00594 num = avio_rb16(pb);
00595 *timestamp = avio_rb32(pb);
00596 avio_r8(pb);
00597 *flags = avio_r8(pb);
00598 }
00599 for(i=0;i<s->nb_streams;i++) {
00600 st = s->streams[i];
00601 if (num == st->id)
00602 break;
00603 }
00604 if (i == s->nb_streams) {
00605 skip:
00606
00607 avio_skip(pb, len);
00608 rm->remaining_len = 0;
00609 continue;
00610 }
00611 *stream_index= i;
00612
00613 return len;
00614 }
00615 return -1;
00616 }
00617
00618 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
00619 RMDemuxContext *rm, RMStream *vst,
00620 AVPacket *pkt, int len, int *pseq,
00621 int64_t *timestamp)
00622 {
00623 int hdr, seq, pic_num, len2, pos;
00624 int type;
00625
00626 hdr = avio_r8(pb); len--;
00627 type = hdr >> 6;
00628
00629 if(type != 3){
00630 seq = avio_r8(pb); len--;
00631 }
00632 if(type != 1){
00633 len2 = get_num(pb, &len);
00634 pos = get_num(pb, &len);
00635 pic_num = avio_r8(pb); len--;
00636 }
00637 if(len<0)
00638 return -1;
00639 rm->remaining_len = len;
00640 if(type&1){
00641 if(type == 3){
00642 len= len2;
00643 *timestamp = pos;
00644 }
00645 if(rm->remaining_len < len)
00646 return -1;
00647 rm->remaining_len -= len;
00648 if(av_new_packet(pkt, len + 9) < 0)
00649 return AVERROR(EIO);
00650 pkt->data[0] = 0;
00651 AV_WL32(pkt->data + 1, 1);
00652 AV_WL32(pkt->data + 5, 0);
00653 avio_read(pb, pkt->data + 9, len);
00654 return 0;
00655 }
00656
00657
00658 *pseq = seq;
00659 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
00660 vst->slices = ((hdr & 0x3F) << 1) + 1;
00661 vst->videobufsize = len2 + 8*vst->slices + 1;
00662 av_free_packet(&vst->pkt);
00663 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
00664 return AVERROR(ENOMEM);
00665 vst->videobufpos = 8*vst->slices + 1;
00666 vst->cur_slice = 0;
00667 vst->curpic_num = pic_num;
00668 vst->pktpos = avio_tell(pb);
00669 }
00670 if(type == 2)
00671 len = FFMIN(len, pos);
00672
00673 if(++vst->cur_slice > vst->slices)
00674 return 1;
00675 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
00676 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
00677 if(vst->videobufpos + len > vst->videobufsize)
00678 return 1;
00679 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
00680 return AVERROR(EIO);
00681 vst->videobufpos += len;
00682 rm->remaining_len-= len;
00683
00684 if (type == 2 || vst->videobufpos == vst->videobufsize) {
00685 vst->pkt.data[0] = vst->cur_slice-1;
00686 *pkt= vst->pkt;
00687 vst->pkt.data= NULL;
00688 vst->pkt.size= 0;
00689 if(vst->slices != vst->cur_slice)
00690 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
00691 vst->videobufpos - 1 - 8*vst->slices);
00692 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
00693 pkt->pts = AV_NOPTS_VALUE;
00694 pkt->pos = vst->pktpos;
00695 vst->slices = 0;
00696 return 0;
00697 }
00698
00699 return 1;
00700 }
00701
00702 static inline void
00703 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
00704 {
00705 uint8_t *ptr;
00706 int j;
00707
00708 if (st->codec->codec_id == CODEC_ID_AC3) {
00709 ptr = pkt->data;
00710 for (j=0;j<pkt->size;j+=2) {
00711 FFSWAP(int, ptr[0], ptr[1]);
00712 ptr += 2;
00713 }
00714 }
00715 }
00716
00721 void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
00722 {
00723 int n, bs = sub_packet_h * framesize * 2 / 96;
00724
00725 for (n = 0; n < 38; n++) {
00726 int j;
00727 int i = bs * sipr_swaps[n][0];
00728 int o = bs * sipr_swaps[n][1];
00729
00730
00731 for (j = 0; j < bs; j++, i++, o++) {
00732 int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF,
00733 y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF;
00734
00735 buf[o >> 1] = (x << (4 * (o & 1))) |
00736 (buf[o >> 1] & (0xF << (4 * !(o & 1))));
00737 buf[i >> 1] = (y << (4 * (i & 1))) |
00738 (buf[i >> 1] & (0xF << (4 * !(i & 1))));
00739 }
00740 }
00741 }
00742
00743 int
00744 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
00745 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
00746 int *seq, int flags, int64_t timestamp)
00747 {
00748 RMDemuxContext *rm = s->priv_data;
00749
00750 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00751 rm->current_stream= st->id;
00752 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
00753 return -1;
00754 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00755 if ((ast->deint_id == DEINT_ID_GENR) ||
00756 (ast->deint_id == DEINT_ID_INT4) ||
00757 (ast->deint_id == DEINT_ID_SIPR)) {
00758 int x;
00759 int sps = ast->sub_packet_size;
00760 int cfs = ast->coded_framesize;
00761 int h = ast->sub_packet_h;
00762 int y = ast->sub_packet_cnt;
00763 int w = ast->audio_framesize;
00764
00765 if (flags & 2)
00766 y = ast->sub_packet_cnt = 0;
00767 if (!y)
00768 ast->audiotimestamp = timestamp;
00769
00770 switch (ast->deint_id) {
00771 case DEINT_ID_INT4:
00772 for (x = 0; x < h/2; x++)
00773 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
00774 break;
00775 case DEINT_ID_GENR:
00776 for (x = 0; x < w/sps; x++)
00777 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
00778 break;
00779 case DEINT_ID_SIPR:
00780 avio_read(pb, ast->pkt.data + y * w, w);
00781 break;
00782 }
00783
00784 if (++(ast->sub_packet_cnt) < h)
00785 return -1;
00786 if (ast->deint_id == DEINT_ID_SIPR)
00787 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
00788
00789 ast->sub_packet_cnt = 0;
00790 rm->audio_stream_num = st->index;
00791 rm->audio_pkt_cnt = h * w / st->codec->block_align;
00792 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
00793 (ast->deint_id == DEINT_ID_VBRS)) {
00794 int x;
00795 rm->audio_stream_num = st->index;
00796 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
00797 if (ast->sub_packet_cnt) {
00798 for (x = 0; x < ast->sub_packet_cnt; x++)
00799 ast->sub_packet_lengths[x] = avio_rb16(pb);
00800 rm->audio_pkt_cnt = ast->sub_packet_cnt;
00801 ast->audiotimestamp = timestamp;
00802 } else
00803 return -1;
00804 } else {
00805 av_get_packet(pb, pkt, len);
00806 rm_ac3_swap_bytes(st, pkt);
00807 }
00808 } else
00809 av_get_packet(pb, pkt, len);
00810
00811 pkt->stream_index = st->index;
00812
00813 #if 0
00814 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00815 if(st->codec->codec_id == CODEC_ID_RV20){
00816 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
00817 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
00818
00819 seq |= (timestamp&~0x3FFF);
00820 if(seq - timestamp > 0x2000) seq -= 0x4000;
00821 if(seq - timestamp < -0x2000) seq += 0x4000;
00822 }
00823 }
00824 #endif
00825
00826 pkt->pts = timestamp;
00827 if (flags & 2)
00828 pkt->flags |= AV_PKT_FLAG_KEY;
00829
00830 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
00831 }
00832
00833 int
00834 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
00835 AVStream *st, RMStream *ast, AVPacket *pkt)
00836 {
00837 RMDemuxContext *rm = s->priv_data;
00838
00839 assert (rm->audio_pkt_cnt > 0);
00840
00841 if (ast->deint_id == DEINT_ID_VBRF ||
00842 ast->deint_id == DEINT_ID_VBRS)
00843 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
00844 else {
00845 av_new_packet(pkt, st->codec->block_align);
00846 memcpy(pkt->data, ast->pkt.data + st->codec->block_align *
00847 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
00848 st->codec->block_align);
00849 }
00850 rm->audio_pkt_cnt--;
00851 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
00852 ast->audiotimestamp = AV_NOPTS_VALUE;
00853 pkt->flags = AV_PKT_FLAG_KEY;
00854 } else
00855 pkt->flags = 0;
00856 pkt->stream_index = st->index;
00857
00858 return rm->audio_pkt_cnt;
00859 }
00860
00861 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
00862 {
00863 RMDemuxContext *rm = s->priv_data;
00864 AVStream *st;
00865 int i, len, res, seq = 1;
00866 int64_t timestamp, pos;
00867 int flags;
00868
00869 for (;;) {
00870 if (rm->audio_pkt_cnt) {
00871
00872 st = s->streams[rm->audio_stream_num];
00873 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
00874 flags = 0;
00875 } else {
00876 if (rm->old_format) {
00877 RMStream *ast;
00878
00879 st = s->streams[0];
00880 ast = st->priv_data;
00881 timestamp = AV_NOPTS_VALUE;
00882 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
00883 ast->coded_framesize * ast->sub_packet_h / 2;
00884 flags = (seq++ == 1) ? 2 : 0;
00885 pos = avio_tell(s->pb);
00886 } else {
00887 len=sync(s, ×tamp, &flags, &i, &pos);
00888 if (len > 0)
00889 st = s->streams[i];
00890 }
00891
00892 if(len<0 || s->pb->eof_reached)
00893 return AVERROR(EIO);
00894
00895 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
00896 &seq, flags, timestamp);
00897 if((flags&2) && (seq&0x7F) == 1)
00898 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
00899 if (res)
00900 continue;
00901 }
00902
00903 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
00904 || st->discard >= AVDISCARD_ALL){
00905 av_free_packet(pkt);
00906 } else
00907 break;
00908 }
00909
00910 return 0;
00911 }
00912
00913 static int rm_read_close(AVFormatContext *s)
00914 {
00915 int i;
00916
00917 for (i=0;i<s->nb_streams;i++)
00918 ff_rm_free_rmstream(s->streams[i]->priv_data);
00919
00920 return 0;
00921 }
00922
00923 static int rm_probe(AVProbeData *p)
00924 {
00925
00926 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
00927 p->buf[2] == 'M' && p->buf[3] == 'F' &&
00928 p->buf[4] == 0 && p->buf[5] == 0) ||
00929 (p->buf[0] == '.' && p->buf[1] == 'r' &&
00930 p->buf[2] == 'a' && p->buf[3] == 0xfd))
00931 return AVPROBE_SCORE_MAX;
00932 else
00933 return 0;
00934 }
00935
00936 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
00937 int64_t *ppos, int64_t pos_limit)
00938 {
00939 RMDemuxContext *rm = s->priv_data;
00940 int64_t pos, dts;
00941 int stream_index2, flags, len, h;
00942
00943 pos = *ppos;
00944
00945 if(rm->old_format)
00946 return AV_NOPTS_VALUE;
00947
00948 avio_seek(s->pb, pos, SEEK_SET);
00949 rm->remaining_len=0;
00950 for(;;){
00951 int seq=1;
00952 AVStream *st;
00953
00954 len=sync(s, &dts, &flags, &stream_index2, &pos);
00955 if(len<0)
00956 return AV_NOPTS_VALUE;
00957
00958 st = s->streams[stream_index2];
00959 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00960 h= avio_r8(s->pb); len--;
00961 if(!(h & 0x40)){
00962 seq = avio_r8(s->pb); len--;
00963 }
00964 }
00965
00966 if((flags&2) && (seq&0x7F) == 1){
00967
00968 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
00969 if(stream_index2 == stream_index)
00970 break;
00971 }
00972
00973 avio_skip(s->pb, len);
00974 }
00975 *ppos = pos;
00976 return dts;
00977 }
00978
00979 AVInputFormat ff_rm_demuxer = {
00980 .name = "rm",
00981 .long_name = NULL_IF_CONFIG_SMALL("RealMedia format"),
00982 .priv_data_size = sizeof(RMDemuxContext),
00983 .read_probe = rm_probe,
00984 .read_header = rm_read_header,
00985 .read_packet = rm_read_packet,
00986 .read_close = rm_read_close,
00987 .read_timestamp = rm_read_dts,
00988 };
00989
00990 AVInputFormat ff_rdt_demuxer = {
00991 .name = "rdt",
00992 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
00993 .priv_data_size = sizeof(RMDemuxContext),
00994 .read_close = rm_read_close,
00995 .flags = AVFMT_NOFILE,
00996 };