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00022 #include "libavutil/avassert.h"
00023 #include "libavutil/avstring.h"
00024 #include "libavutil/channel_layout.h"
00025 #include "libavutil/intreadwrite.h"
00026 #include "libavutil/dict.h"
00027 #include "avformat.h"
00028 #include "internal.h"
00029 #include "rmsipr.h"
00030 #include "rm.h"
00031
00032 #define DEINT_ID_GENR MKTAG('g', 'e', 'n', 'r')
00033 #define DEINT_ID_INT0 MKTAG('I', 'n', 't', '0')
00034 #define DEINT_ID_INT4 MKTAG('I', 'n', 't', '4')
00035 #define DEINT_ID_SIPR MKTAG('s', 'i', 'p', 'r')
00036 #define DEINT_ID_VBRF MKTAG('v', 'b', 'r', 'f')
00037 #define DEINT_ID_VBRS MKTAG('v', 'b', 'r', 's')
00038
00039 struct RMStream {
00040 AVPacket pkt;
00041 int videobufsize;
00042 int videobufpos;
00043 int curpic_num;
00044 int cur_slice, slices;
00045 int64_t pktpos;
00046
00047 int64_t audiotimestamp;
00048 int sub_packet_cnt;
00049 int sub_packet_size, sub_packet_h, coded_framesize;
00050 int audio_framesize;
00051 int sub_packet_lengths[16];
00052 int32_t deint_id;
00053 };
00054
00055 typedef struct {
00056 int nb_packets;
00057 int old_format;
00058 int current_stream;
00059 int remaining_len;
00060 int audio_stream_num;
00061 int audio_pkt_cnt;
00062 } RMDemuxContext;
00063
00064 static inline void get_strl(AVIOContext *pb, char *buf, int buf_size, int len)
00065 {
00066 int i;
00067 char *q, r;
00068
00069 q = buf;
00070 for(i=0;i<len;i++) {
00071 r = avio_r8(pb);
00072 if (i < buf_size - 1)
00073 *q++ = r;
00074 }
00075 if (buf_size > 0) *q = '\0';
00076 }
00077
00078 static void get_str8(AVIOContext *pb, char *buf, int buf_size)
00079 {
00080 get_strl(pb, buf, buf_size, avio_r8(pb));
00081 }
00082
00083 static int rm_read_extradata(AVIOContext *pb, AVCodecContext *avctx, unsigned size)
00084 {
00085 if (size >= 1<<24)
00086 return -1;
00087 avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
00088 if (!avctx->extradata)
00089 return AVERROR(ENOMEM);
00090 avctx->extradata_size = avio_read(pb, avctx->extradata, size);
00091 memset(avctx->extradata + avctx->extradata_size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
00092 if (avctx->extradata_size != size)
00093 return AVERROR(EIO);
00094 return 0;
00095 }
00096
00097 static void rm_read_metadata(AVFormatContext *s, int wide)
00098 {
00099 char buf[1024];
00100 int i;
00101 for (i=0; i<FF_ARRAY_ELEMS(ff_rm_metadata); i++) {
00102 int len = wide ? avio_rb16(s->pb) : avio_r8(s->pb);
00103 get_strl(s->pb, buf, sizeof(buf), len);
00104 av_dict_set(&s->metadata, ff_rm_metadata[i], buf, 0);
00105 }
00106 }
00107
00108 RMStream *ff_rm_alloc_rmstream (void)
00109 {
00110 RMStream *rms = av_mallocz(sizeof(RMStream));
00111 rms->curpic_num = -1;
00112 return rms;
00113 }
00114
00115 void ff_rm_free_rmstream (RMStream *rms)
00116 {
00117 av_free_packet(&rms->pkt);
00118 }
00119
00120 static int rm_read_audio_stream_info(AVFormatContext *s, AVIOContext *pb,
00121 AVStream *st, RMStream *ast, int read_all)
00122 {
00123 char buf[256];
00124 uint32_t version;
00125 int ret;
00126
00127
00128 version = avio_rb16(pb);
00129 if (version == 3) {
00130 int header_size = avio_rb16(pb);
00131 int64_t startpos = avio_tell(pb);
00132 avio_skip(pb, 14);
00133 rm_read_metadata(s, 0);
00134 if ((startpos + header_size) >= avio_tell(pb) + 2) {
00135
00136 avio_r8(pb);
00137 get_str8(pb, buf, sizeof(buf));
00138 }
00139
00140 if ((startpos + header_size) > avio_tell(pb))
00141 avio_skip(pb, header_size + startpos - avio_tell(pb));
00142 st->codec->sample_rate = 8000;
00143 st->codec->channels = 1;
00144 st->codec->channel_layout = AV_CH_LAYOUT_MONO;
00145 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00146 st->codec->codec_id = AV_CODEC_ID_RA_144;
00147 ast->deint_id = DEINT_ID_INT0;
00148 } else {
00149 int flavor, sub_packet_h, coded_framesize, sub_packet_size;
00150 int codecdata_length;
00151
00152 avio_skip(pb, 2);
00153 avio_rb32(pb);
00154 avio_rb32(pb);
00155 avio_rb16(pb);
00156 avio_rb32(pb);
00157 flavor= avio_rb16(pb);
00158 ast->coded_framesize = coded_framesize = avio_rb32(pb);
00159 avio_rb32(pb);
00160 avio_rb32(pb);
00161 avio_rb32(pb);
00162 ast->sub_packet_h = sub_packet_h = avio_rb16(pb);
00163 st->codec->block_align= avio_rb16(pb);
00164 ast->sub_packet_size = sub_packet_size = avio_rb16(pb);
00165 avio_rb16(pb);
00166 if (version == 5) {
00167 avio_rb16(pb); avio_rb16(pb); avio_rb16(pb);
00168 }
00169 st->codec->sample_rate = avio_rb16(pb);
00170 avio_rb32(pb);
00171 st->codec->channels = avio_rb16(pb);
00172 if (version == 5) {
00173 ast->deint_id = avio_rl32(pb);
00174 avio_read(pb, buf, 4);
00175 buf[4] = 0;
00176 } else {
00177 get_str8(pb, buf, sizeof(buf));
00178 ast->deint_id = AV_RL32(buf);
00179 get_str8(pb, buf, sizeof(buf));
00180 }
00181 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00182 st->codec->codec_tag = AV_RL32(buf);
00183 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
00184 st->codec->codec_tag);
00185
00186 switch (st->codec->codec_id) {
00187 case AV_CODEC_ID_AC3:
00188 st->need_parsing = AVSTREAM_PARSE_FULL;
00189 break;
00190 case AV_CODEC_ID_RA_288:
00191 st->codec->extradata_size= 0;
00192 ast->audio_framesize = st->codec->block_align;
00193 st->codec->block_align = coded_framesize;
00194 break;
00195 case AV_CODEC_ID_COOK:
00196 st->need_parsing = AVSTREAM_PARSE_HEADERS;
00197 case AV_CODEC_ID_ATRAC3:
00198 case AV_CODEC_ID_SIPR:
00199 avio_rb16(pb); avio_r8(pb);
00200 if (version == 5)
00201 avio_r8(pb);
00202 codecdata_length = avio_rb32(pb);
00203 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
00204 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
00205 return -1;
00206 }
00207
00208 ast->audio_framesize = st->codec->block_align;
00209 if (st->codec->codec_id == AV_CODEC_ID_SIPR) {
00210 if (flavor > 3) {
00211 av_log(s, AV_LOG_ERROR, "bad SIPR file flavor %d\n",
00212 flavor);
00213 return -1;
00214 }
00215 st->codec->block_align = ff_sipr_subpk_size[flavor];
00216 } else {
00217 if(sub_packet_size <= 0){
00218 av_log(s, AV_LOG_ERROR, "sub_packet_size is invalid\n");
00219 return -1;
00220 }
00221 st->codec->block_align = ast->sub_packet_size;
00222 }
00223 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length)) < 0)
00224 return ret;
00225
00226 break;
00227 case AV_CODEC_ID_AAC:
00228 avio_rb16(pb); avio_r8(pb);
00229 if (version == 5)
00230 avio_r8(pb);
00231 codecdata_length = avio_rb32(pb);
00232 if(codecdata_length + FF_INPUT_BUFFER_PADDING_SIZE <= (unsigned)codecdata_length){
00233 av_log(s, AV_LOG_ERROR, "codecdata_length too large\n");
00234 return -1;
00235 }
00236 if (codecdata_length >= 1) {
00237 avio_r8(pb);
00238 if ((ret = rm_read_extradata(pb, st->codec, codecdata_length - 1)) < 0)
00239 return ret;
00240 }
00241 break;
00242 default:
00243 av_strlcpy(st->codec->codec_name, buf, sizeof(st->codec->codec_name));
00244 }
00245 if (ast->deint_id == DEINT_ID_INT4 ||
00246 ast->deint_id == DEINT_ID_GENR ||
00247 ast->deint_id == DEINT_ID_SIPR) {
00248 if (st->codec->block_align <= 0 ||
00249 ast->audio_framesize * sub_packet_h > (unsigned)INT_MAX ||
00250 ast->audio_framesize * sub_packet_h < st->codec->block_align)
00251 return AVERROR_INVALIDDATA;
00252 if (av_new_packet(&ast->pkt, ast->audio_framesize * sub_packet_h) < 0)
00253 return AVERROR(ENOMEM);
00254 }
00255 switch (ast->deint_id) {
00256 case DEINT_ID_INT4:
00257 if (ast->coded_framesize > ast->audio_framesize ||
00258 sub_packet_h <= 1 ||
00259 ast->coded_framesize * sub_packet_h > (2 + (sub_packet_h & 1)) * ast->audio_framesize)
00260 return AVERROR_INVALIDDATA;
00261 break;
00262 case DEINT_ID_GENR:
00263 if (ast->sub_packet_size <= 0 ||
00264 ast->sub_packet_size > ast->audio_framesize)
00265 return AVERROR_INVALIDDATA;
00266 break;
00267 case DEINT_ID_SIPR:
00268 case DEINT_ID_INT0:
00269 case DEINT_ID_VBRS:
00270 case DEINT_ID_VBRF:
00271 break;
00272 default:
00273 av_log(s, AV_LOG_ERROR, "Unknown interleaver %X\n", ast->deint_id);
00274 return AVERROR_INVALIDDATA;
00275 }
00276
00277 if (read_all) {
00278 avio_r8(pb);
00279 avio_r8(pb);
00280 avio_r8(pb);
00281 rm_read_metadata(s, 0);
00282 }
00283 }
00284 return 0;
00285 }
00286
00287 int
00288 ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
00289 AVStream *st, RMStream *rst, int codec_data_size, const uint8_t *mime)
00290 {
00291 unsigned int v;
00292 int size;
00293 int64_t codec_pos;
00294 int ret;
00295
00296 avpriv_set_pts_info(st, 64, 1, 1000);
00297 codec_pos = avio_tell(pb);
00298 v = avio_rb32(pb);
00299 if (v == MKTAG(0xfd, 'a', 'r', '.')) {
00300
00301 if (rm_read_audio_stream_info(s, pb, st, rst, 0))
00302 return -1;
00303 } else if (v == MKBETAG('L', 'S', 'D', ':')) {
00304 avio_seek(pb, -4, SEEK_CUR);
00305 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size)) < 0)
00306 return ret;
00307
00308 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
00309 st->codec->codec_tag = AV_RL32(st->codec->extradata);
00310 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
00311 st->codec->codec_tag);
00312 } else if(mime && !strcmp(mime, "logical-fileinfo")){
00313 int stream_count, rule_count, property_count, i;
00314 ff_free_stream(s, st);
00315 if (avio_rb16(pb) != 0) {
00316 av_log(s, AV_LOG_WARNING, "Unsupported version\n");
00317 goto skip;
00318 }
00319 stream_count = avio_rb16(pb);
00320 avio_skip(pb, 6*stream_count);
00321 rule_count = avio_rb16(pb);
00322 avio_skip(pb, 2*rule_count);
00323 property_count = avio_rb16(pb);
00324 for(i=0; i<property_count; i++){
00325 uint8_t name[128], val[128];
00326 avio_rb32(pb);
00327 if (avio_rb16(pb) != 0) {
00328 av_log(s, AV_LOG_WARNING, "Unsupported Name value property version\n");
00329 goto skip;
00330 }
00331 get_str8(pb, name, sizeof(name));
00332 switch(avio_rb32(pb)) {
00333 case 2: get_strl(pb, val, sizeof(val), avio_rb16(pb));
00334 av_dict_set(&s->metadata, name, val, 0);
00335 break;
00336 default: avio_skip(pb, avio_rb16(pb));
00337 }
00338 }
00339 } else {
00340 int fps;
00341 if (avio_rl32(pb) != MKTAG('V', 'I', 'D', 'O')) {
00342 fail1:
00343 av_log(s, AV_LOG_WARNING, "Unsupported stream type %08x\n", v);
00344 goto skip;
00345 }
00346 st->codec->codec_tag = avio_rl32(pb);
00347 st->codec->codec_id = ff_codec_get_id(ff_rm_codec_tags,
00348 st->codec->codec_tag);
00349 av_dlog(s, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
00350 if (st->codec->codec_id == AV_CODEC_ID_NONE)
00351 goto fail1;
00352 st->codec->width = avio_rb16(pb);
00353 st->codec->height = avio_rb16(pb);
00354 avio_skip(pb, 2);
00355 avio_skip(pb, 4);
00356 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
00357 st->need_parsing = AVSTREAM_PARSE_TIMESTAMPS;
00358 fps = avio_rb32(pb);
00359
00360 if ((ret = rm_read_extradata(pb, st->codec, codec_data_size - (avio_tell(pb) - codec_pos))) < 0)
00361 return ret;
00362
00363 av_reduce(&st->avg_frame_rate.den, &st->avg_frame_rate.num,
00364 0x10000, fps, (1 << 30) - 1);
00365 #if FF_API_R_FRAME_RATE
00366 st->r_frame_rate = st->avg_frame_rate;
00367 #endif
00368 }
00369
00370 skip:
00371
00372 size = avio_tell(pb) - codec_pos;
00373 avio_skip(pb, codec_data_size - size);
00374
00375 return 0;
00376 }
00377
00380 static int rm_read_index(AVFormatContext *s)
00381 {
00382 AVIOContext *pb = s->pb;
00383 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
00384 AVStream *st;
00385
00386 do {
00387 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
00388 return -1;
00389 size = avio_rb32(pb);
00390 if (size < 20)
00391 return -1;
00392 avio_skip(pb, 2);
00393 n_pkts = avio_rb32(pb);
00394 str_id = avio_rb16(pb);
00395 next_off = avio_rb32(pb);
00396 for (n = 0; n < s->nb_streams; n++)
00397 if (s->streams[n]->id == str_id) {
00398 st = s->streams[n];
00399 break;
00400 }
00401 if (n == s->nb_streams) {
00402 av_log(s, AV_LOG_ERROR,
00403 "Invalid stream index %d for index at pos %"PRId64"\n",
00404 str_id, avio_tell(pb));
00405 goto skip;
00406 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
00407 av_log(s, AV_LOG_ERROR,
00408 "Nr. of packets in packet index for stream index %d "
00409 "exceeds filesize (%"PRId64" at %"PRId64" = %"PRId64")\n",
00410 str_id, avio_size(pb), avio_tell(pb),
00411 (avio_size(pb) - avio_tell(pb)) / 14);
00412 goto skip;
00413 }
00414
00415 for (n = 0; n < n_pkts; n++) {
00416 avio_skip(pb, 2);
00417 pts = avio_rb32(pb);
00418 pos = avio_rb32(pb);
00419 avio_skip(pb, 4);
00420
00421 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
00422 }
00423
00424 skip:
00425 if (next_off && avio_tell(pb) < next_off &&
00426 avio_seek(pb, next_off, SEEK_SET) < 0) {
00427 av_log(s, AV_LOG_ERROR,
00428 "Non-linear index detected, not supported\n");
00429 return -1;
00430 }
00431 } while (next_off);
00432
00433 return 0;
00434 }
00435
00436 static int rm_read_header_old(AVFormatContext *s)
00437 {
00438 RMDemuxContext *rm = s->priv_data;
00439 AVStream *st;
00440
00441 rm->old_format = 1;
00442 st = avformat_new_stream(s, NULL);
00443 if (!st)
00444 return -1;
00445 st->priv_data = ff_rm_alloc_rmstream();
00446 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
00447 }
00448
00449 static int rm_read_header(AVFormatContext *s)
00450 {
00451 RMDemuxContext *rm = s->priv_data;
00452 AVStream *st;
00453 AVIOContext *pb = s->pb;
00454 unsigned int tag;
00455 int tag_size;
00456 unsigned int start_time, duration;
00457 unsigned int data_off = 0, indx_off = 0;
00458 char buf[128], mime[128];
00459 int flags = 0;
00460
00461 tag = avio_rl32(pb);
00462 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
00463
00464 return rm_read_header_old(s);
00465 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
00466 return AVERROR(EIO);
00467 }
00468
00469 tag_size = avio_rb32(pb);
00470 avio_skip(pb, tag_size - 8);
00471
00472 for(;;) {
00473 if (url_feof(pb))
00474 return -1;
00475 tag = avio_rl32(pb);
00476 tag_size = avio_rb32(pb);
00477 avio_rb16(pb);
00478 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
00479 (tag ) & 0xff,
00480 (tag >> 8) & 0xff,
00481 (tag >> 16) & 0xff,
00482 (tag >> 24) & 0xff,
00483 tag,
00484 tag_size);
00485 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
00486 return -1;
00487 switch(tag) {
00488 case MKTAG('P', 'R', 'O', 'P'):
00489
00490 avio_rb32(pb);
00491 avio_rb32(pb);
00492 avio_rb32(pb);
00493 avio_rb32(pb);
00494 avio_rb32(pb);
00495 duration = avio_rb32(pb);
00496 s->duration = av_rescale(duration, AV_TIME_BASE, 1000);
00497 avio_rb32(pb);
00498 indx_off = avio_rb32(pb);
00499 data_off = avio_rb32(pb);
00500 avio_rb16(pb);
00501 flags = avio_rb16(pb);
00502 break;
00503 case MKTAG('C', 'O', 'N', 'T'):
00504 rm_read_metadata(s, 1);
00505 break;
00506 case MKTAG('M', 'D', 'P', 'R'):
00507 st = avformat_new_stream(s, NULL);
00508 if (!st)
00509 return AVERROR(ENOMEM);
00510 st->id = avio_rb16(pb);
00511 avio_rb32(pb);
00512 st->codec->bit_rate = avio_rb32(pb);
00513 avio_rb32(pb);
00514 avio_rb32(pb);
00515 start_time = avio_rb32(pb);
00516 avio_rb32(pb);
00517 duration = avio_rb32(pb);
00518 st->start_time = start_time;
00519 st->duration = duration;
00520 if(duration>0)
00521 s->duration = AV_NOPTS_VALUE;
00522 get_str8(pb, buf, sizeof(buf));
00523 get_str8(pb, mime, sizeof(mime));
00524 st->codec->codec_type = AVMEDIA_TYPE_DATA;
00525 st->priv_data = ff_rm_alloc_rmstream();
00526 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
00527 avio_rb32(pb), mime) < 0)
00528 return -1;
00529 break;
00530 case MKTAG('D', 'A', 'T', 'A'):
00531 goto header_end;
00532 default:
00533
00534 avio_skip(pb, tag_size - 10);
00535 break;
00536 }
00537 }
00538 header_end:
00539 rm->nb_packets = avio_rb32(pb);
00540 if (!rm->nb_packets && (flags & 4))
00541 rm->nb_packets = 3600 * 25;
00542 avio_rb32(pb);
00543
00544 if (!data_off)
00545 data_off = avio_tell(pb) - 18;
00546 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
00547 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
00548 rm_read_index(s);
00549 avio_seek(pb, data_off + 18, SEEK_SET);
00550 }
00551
00552 return 0;
00553 }
00554
00555 static int get_num(AVIOContext *pb, int *len)
00556 {
00557 int n, n1;
00558
00559 n = avio_rb16(pb);
00560 (*len)-=2;
00561 n &= 0x7FFF;
00562 if (n >= 0x4000) {
00563 return n - 0x4000;
00564 } else {
00565 n1 = avio_rb16(pb);
00566 (*len)-=2;
00567 return (n << 16) | n1;
00568 }
00569 }
00570
00571
00572 #define RAW_PACKET_SIZE 1000
00573
00574 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
00575 RMDemuxContext *rm = s->priv_data;
00576 AVIOContext *pb = s->pb;
00577 AVStream *st;
00578 uint32_t state=0xFFFFFFFF;
00579
00580 while(!url_feof(pb)){
00581 int len, num, i;
00582 *pos= avio_tell(pb) - 3;
00583 if(rm->remaining_len > 0){
00584 num= rm->current_stream;
00585 len= rm->remaining_len;
00586 *timestamp = AV_NOPTS_VALUE;
00587 *flags= 0;
00588 }else{
00589 state= (state<<8) + avio_r8(pb);
00590
00591 if(state == MKBETAG('I', 'N', 'D', 'X')){
00592 int n_pkts, expected_len;
00593 len = avio_rb32(pb);
00594 avio_skip(pb, 2);
00595 n_pkts = avio_rb32(pb);
00596 expected_len = 20 + n_pkts * 14;
00597 if (len == 20)
00598
00599 len = expected_len;
00600 else if (len != expected_len)
00601 av_log(s, AV_LOG_WARNING,
00602 "Index size %d (%d pkts) is wrong, should be %d.\n",
00603 len, n_pkts, expected_len);
00604 len -= 14;
00605 if(len<0)
00606 continue;
00607 goto skip;
00608 } else if (state == MKBETAG('D','A','T','A')) {
00609 av_log(s, AV_LOG_WARNING,
00610 "DATA tag in middle of chunk, file may be broken.\n");
00611 }
00612
00613 if(state > (unsigned)0xFFFF || state <= 12)
00614 continue;
00615 len=state - 12;
00616 state= 0xFFFFFFFF;
00617
00618 num = avio_rb16(pb);
00619 *timestamp = avio_rb32(pb);
00620 avio_r8(pb);
00621 *flags = avio_r8(pb);
00622 }
00623 for(i=0;i<s->nb_streams;i++) {
00624 st = s->streams[i];
00625 if (num == st->id)
00626 break;
00627 }
00628 if (i == s->nb_streams) {
00629 skip:
00630
00631 avio_skip(pb, len);
00632 rm->remaining_len = 0;
00633 continue;
00634 }
00635 *stream_index= i;
00636
00637 return len;
00638 }
00639 return -1;
00640 }
00641
00642 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
00643 RMDemuxContext *rm, RMStream *vst,
00644 AVPacket *pkt, int len, int *pseq,
00645 int64_t *timestamp)
00646 {
00647 int hdr, seq, pic_num, len2, pos;
00648 int type;
00649
00650 hdr = avio_r8(pb); len--;
00651 type = hdr >> 6;
00652
00653 if(type != 3){
00654 seq = avio_r8(pb); len--;
00655 }
00656 if(type != 1){
00657 len2 = get_num(pb, &len);
00658 pos = get_num(pb, &len);
00659 pic_num = avio_r8(pb); len--;
00660 }
00661 if(len<0)
00662 return -1;
00663 rm->remaining_len = len;
00664 if(type&1){
00665 if(type == 3){
00666 len= len2;
00667 *timestamp = pos;
00668 }
00669 if(rm->remaining_len < len)
00670 return -1;
00671 rm->remaining_len -= len;
00672 if(av_new_packet(pkt, len + 9) < 0)
00673 return AVERROR(EIO);
00674 pkt->data[0] = 0;
00675 AV_WL32(pkt->data + 1, 1);
00676 AV_WL32(pkt->data + 5, 0);
00677 avio_read(pb, pkt->data + 9, len);
00678 return 0;
00679 }
00680
00681
00682 *pseq = seq;
00683 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
00684 vst->slices = ((hdr & 0x3F) << 1) + 1;
00685 vst->videobufsize = len2 + 8*vst->slices + 1;
00686 av_free_packet(&vst->pkt);
00687 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
00688 return AVERROR(ENOMEM);
00689 vst->videobufpos = 8*vst->slices + 1;
00690 vst->cur_slice = 0;
00691 vst->curpic_num = pic_num;
00692 vst->pktpos = avio_tell(pb);
00693 }
00694 if(type == 2)
00695 len = FFMIN(len, pos);
00696
00697 if(++vst->cur_slice > vst->slices)
00698 return 1;
00699 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
00700 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
00701 if(vst->videobufpos + len > vst->videobufsize)
00702 return 1;
00703 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
00704 return AVERROR(EIO);
00705 vst->videobufpos += len;
00706 rm->remaining_len-= len;
00707
00708 if (type == 2 || vst->videobufpos == vst->videobufsize) {
00709 vst->pkt.data[0] = vst->cur_slice-1;
00710 *pkt= vst->pkt;
00711 vst->pkt.data= NULL;
00712 vst->pkt.size= 0;
00713 if(vst->slices != vst->cur_slice)
00714 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
00715 vst->videobufpos - 1 - 8*vst->slices);
00716 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
00717 pkt->pts = AV_NOPTS_VALUE;
00718 pkt->pos = vst->pktpos;
00719 vst->slices = 0;
00720 return 0;
00721 }
00722
00723 return 1;
00724 }
00725
00726 static inline void
00727 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
00728 {
00729 uint8_t *ptr;
00730 int j;
00731
00732 if (st->codec->codec_id == AV_CODEC_ID_AC3) {
00733 ptr = pkt->data;
00734 for (j=0;j<pkt->size;j+=2) {
00735 FFSWAP(int, ptr[0], ptr[1]);
00736 ptr += 2;
00737 }
00738 }
00739 }
00740
00741 int
00742 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
00743 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
00744 int *seq, int flags, int64_t timestamp)
00745 {
00746 RMDemuxContext *rm = s->priv_data;
00747
00748 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00749 rm->current_stream= st->id;
00750 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
00751 return -1;
00752 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00753 if ((ast->deint_id == DEINT_ID_GENR) ||
00754 (ast->deint_id == DEINT_ID_INT4) ||
00755 (ast->deint_id == DEINT_ID_SIPR)) {
00756 int x;
00757 int sps = ast->sub_packet_size;
00758 int cfs = ast->coded_framesize;
00759 int h = ast->sub_packet_h;
00760 int y = ast->sub_packet_cnt;
00761 int w = ast->audio_framesize;
00762
00763 if (flags & 2)
00764 y = ast->sub_packet_cnt = 0;
00765 if (!y)
00766 ast->audiotimestamp = timestamp;
00767
00768 switch (ast->deint_id) {
00769 case DEINT_ID_INT4:
00770 for (x = 0; x < h/2; x++)
00771 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
00772 break;
00773 case DEINT_ID_GENR:
00774 for (x = 0; x < w/sps; x++)
00775 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
00776 break;
00777 case DEINT_ID_SIPR:
00778 avio_read(pb, ast->pkt.data + y * w, w);
00779 break;
00780 }
00781
00782 if (++(ast->sub_packet_cnt) < h)
00783 return -1;
00784 if (ast->deint_id == DEINT_ID_SIPR)
00785 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
00786
00787 ast->sub_packet_cnt = 0;
00788 rm->audio_stream_num = st->index;
00789 rm->audio_pkt_cnt = h * w / st->codec->block_align;
00790 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
00791 (ast->deint_id == DEINT_ID_VBRS)) {
00792 int x;
00793 rm->audio_stream_num = st->index;
00794 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
00795 if (ast->sub_packet_cnt) {
00796 for (x = 0; x < ast->sub_packet_cnt; x++)
00797 ast->sub_packet_lengths[x] = avio_rb16(pb);
00798 rm->audio_pkt_cnt = ast->sub_packet_cnt;
00799 ast->audiotimestamp = timestamp;
00800 } else
00801 return -1;
00802 } else {
00803 av_get_packet(pb, pkt, len);
00804 rm_ac3_swap_bytes(st, pkt);
00805 }
00806 } else
00807 av_get_packet(pb, pkt, len);
00808
00809 pkt->stream_index = st->index;
00810
00811 #if 0
00812 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00813 if(st->codec->codec_id == AV_CODEC_ID_RV20){
00814 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
00815 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
00816
00817 seq |= (timestamp&~0x3FFF);
00818 if(seq - timestamp > 0x2000) seq -= 0x4000;
00819 if(seq - timestamp < -0x2000) seq += 0x4000;
00820 }
00821 }
00822 #endif
00823
00824 pkt->pts = timestamp;
00825 if (flags & 2)
00826 pkt->flags |= AV_PKT_FLAG_KEY;
00827
00828 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
00829 }
00830
00831 int
00832 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
00833 AVStream *st, RMStream *ast, AVPacket *pkt)
00834 {
00835 RMDemuxContext *rm = s->priv_data;
00836
00837 av_assert0 (rm->audio_pkt_cnt > 0);
00838
00839 if (ast->deint_id == DEINT_ID_VBRF ||
00840 ast->deint_id == DEINT_ID_VBRS)
00841 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
00842 else {
00843 if(av_new_packet(pkt, st->codec->block_align) < 0)
00844 return AVERROR(ENOMEM);
00845 memcpy(pkt->data, ast->pkt.data + st->codec->block_align *
00846 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
00847 st->codec->block_align);
00848 }
00849 rm->audio_pkt_cnt--;
00850 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
00851 ast->audiotimestamp = AV_NOPTS_VALUE;
00852 pkt->flags = AV_PKT_FLAG_KEY;
00853 } else
00854 pkt->flags = 0;
00855 pkt->stream_index = st->index;
00856
00857 return rm->audio_pkt_cnt;
00858 }
00859
00860 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
00861 {
00862 RMDemuxContext *rm = s->priv_data;
00863 AVStream *st;
00864 int i, len, res, seq = 1;
00865 int64_t timestamp, pos;
00866 int flags;
00867
00868 for (;;) {
00869 if (rm->audio_pkt_cnt) {
00870
00871 st = s->streams[rm->audio_stream_num];
00872 res = ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
00873 if(res < 0)
00874 return res;
00875 flags = 0;
00876 } else {
00877 if (rm->old_format) {
00878 RMStream *ast;
00879
00880 st = s->streams[0];
00881 ast = st->priv_data;
00882 timestamp = AV_NOPTS_VALUE;
00883 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
00884 ast->coded_framesize * ast->sub_packet_h / 2;
00885 flags = (seq++ == 1) ? 2 : 0;
00886 pos = avio_tell(s->pb);
00887 } else {
00888 len=sync(s, ×tamp, &flags, &i, &pos);
00889 if (len > 0)
00890 st = s->streams[i];
00891 }
00892
00893 if(len<0 || url_feof(s->pb))
00894 return AVERROR(EIO);
00895
00896 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
00897 &seq, flags, timestamp);
00898 if((flags&2) && (seq&0x7F) == 1)
00899 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
00900 if (res)
00901 continue;
00902 }
00903
00904 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
00905 || st->discard >= AVDISCARD_ALL){
00906 av_free_packet(pkt);
00907 } else
00908 break;
00909 }
00910
00911 return 0;
00912 }
00913
00914 static int rm_read_close(AVFormatContext *s)
00915 {
00916 int i;
00917
00918 for (i=0;i<s->nb_streams;i++)
00919 ff_rm_free_rmstream(s->streams[i]->priv_data);
00920
00921 return 0;
00922 }
00923
00924 static int rm_probe(AVProbeData *p)
00925 {
00926
00927 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
00928 p->buf[2] == 'M' && p->buf[3] == 'F' &&
00929 p->buf[4] == 0 && p->buf[5] == 0) ||
00930 (p->buf[0] == '.' && p->buf[1] == 'r' &&
00931 p->buf[2] == 'a' && p->buf[3] == 0xfd))
00932 return AVPROBE_SCORE_MAX;
00933 else
00934 return 0;
00935 }
00936
00937 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
00938 int64_t *ppos, int64_t pos_limit)
00939 {
00940 RMDemuxContext *rm = s->priv_data;
00941 int64_t pos, dts;
00942 int stream_index2, flags, len, h;
00943
00944 pos = *ppos;
00945
00946 if(rm->old_format)
00947 return AV_NOPTS_VALUE;
00948
00949 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
00950 return AV_NOPTS_VALUE;
00951
00952 rm->remaining_len=0;
00953 for(;;){
00954 int seq=1;
00955 AVStream *st;
00956
00957 len=sync(s, &dts, &flags, &stream_index2, &pos);
00958 if(len<0)
00959 return AV_NOPTS_VALUE;
00960
00961 st = s->streams[stream_index2];
00962 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00963 h= avio_r8(s->pb); len--;
00964 if(!(h & 0x40)){
00965 seq = avio_r8(s->pb); len--;
00966 }
00967 }
00968
00969 if((flags&2) && (seq&0x7F) == 1){
00970 av_dlog(s, "%d %d-%d %"PRId64" %d\n",
00971 flags, stream_index2, stream_index, dts, seq);
00972 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
00973 if(stream_index2 == stream_index)
00974 break;
00975 }
00976
00977 avio_skip(s->pb, len);
00978 }
00979 *ppos = pos;
00980 return dts;
00981 }
00982
00983 AVInputFormat ff_rm_demuxer = {
00984 .name = "rm",
00985 .long_name = NULL_IF_CONFIG_SMALL("RealMedia"),
00986 .priv_data_size = sizeof(RMDemuxContext),
00987 .read_probe = rm_probe,
00988 .read_header = rm_read_header,
00989 .read_packet = rm_read_packet,
00990 .read_close = rm_read_close,
00991 .read_timestamp = rm_read_dts,
00992 };
00993
00994 AVInputFormat ff_rdt_demuxer = {
00995 .name = "rdt",
00996 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
00997 .priv_data_size = sizeof(RMDemuxContext),
00998 .read_close = rm_read_close,
00999 .flags = AVFMT_NOFILE,
01000 };