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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 av_reduce(&st->r_frame_rate.den, &st->r_frame_rate.num,
00338 0x10000, fps, (1 << 30) - 1);
00339 st->avg_frame_rate = st->r_frame_rate;
00340 }
00341
00342 skip:
00343
00344 size = avio_tell(pb) - codec_pos;
00345 avio_skip(pb, codec_data_size - size);
00346
00347 return 0;
00348 }
00349
00352 static int rm_read_index(AVFormatContext *s)
00353 {
00354 AVIOContext *pb = s->pb;
00355 unsigned int size, n_pkts, str_id, next_off, n, pos, pts;
00356 AVStream *st;
00357
00358 do {
00359 if (avio_rl32(pb) != MKTAG('I','N','D','X'))
00360 return -1;
00361 size = avio_rb32(pb);
00362 if (size < 20)
00363 return -1;
00364 avio_skip(pb, 2);
00365 n_pkts = avio_rb32(pb);
00366 str_id = avio_rb16(pb);
00367 next_off = avio_rb32(pb);
00368 for (n = 0; n < s->nb_streams; n++)
00369 if (s->streams[n]->id == str_id) {
00370 st = s->streams[n];
00371 break;
00372 }
00373 if (n == s->nb_streams) {
00374 av_log(s, AV_LOG_ERROR,
00375 "Invalid stream index %d for index at pos %"PRId64"\n",
00376 str_id, avio_tell(pb));
00377 goto skip;
00378 } else if ((avio_size(pb) - avio_tell(pb)) / 14 < n_pkts) {
00379 av_log(s, AV_LOG_ERROR,
00380 "Nr. of packets in packet index for stream index %d "
00381 "exceeds filesize (%"PRId64" at %"PRId64" = %d)\n",
00382 str_id, avio_size(pb), avio_tell(pb),
00383 (avio_size(pb) - avio_tell(pb)) / 14);
00384 goto skip;
00385 }
00386
00387 for (n = 0; n < n_pkts; n++) {
00388 avio_skip(pb, 2);
00389 pts = avio_rb32(pb);
00390 pos = avio_rb32(pb);
00391 avio_skip(pb, 4);
00392
00393 av_add_index_entry(st, pos, pts, 0, 0, AVINDEX_KEYFRAME);
00394 }
00395
00396 skip:
00397 if (next_off && avio_tell(pb) < next_off &&
00398 avio_seek(pb, next_off, SEEK_SET) < 0) {
00399 av_log(s, AV_LOG_ERROR,
00400 "Non-linear index detected, not supported\n");
00401 return -1;
00402 }
00403 } while (next_off);
00404
00405 return 0;
00406 }
00407
00408 static int rm_read_header_old(AVFormatContext *s)
00409 {
00410 RMDemuxContext *rm = s->priv_data;
00411 AVStream *st;
00412
00413 rm->old_format = 1;
00414 st = avformat_new_stream(s, NULL);
00415 if (!st)
00416 return -1;
00417 st->priv_data = ff_rm_alloc_rmstream();
00418 return rm_read_audio_stream_info(s, s->pb, st, st->priv_data, 1);
00419 }
00420
00421 static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
00422 {
00423 RMDemuxContext *rm = s->priv_data;
00424 AVStream *st;
00425 AVIOContext *pb = s->pb;
00426 unsigned int tag;
00427 int tag_size;
00428 unsigned int start_time, duration;
00429 unsigned int data_off = 0, indx_off = 0;
00430 char buf[128];
00431 int flags = 0;
00432
00433 tag = avio_rl32(pb);
00434 if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
00435
00436 return rm_read_header_old(s);
00437 } else if (tag != MKTAG('.', 'R', 'M', 'F')) {
00438 return AVERROR(EIO);
00439 }
00440
00441 avio_rb32(pb);
00442 avio_rb16(pb);
00443 avio_rb32(pb);
00444 avio_rb32(pb);
00445
00446 for(;;) {
00447 if (pb->eof_reached)
00448 return -1;
00449 tag = avio_rl32(pb);
00450 tag_size = avio_rb32(pb);
00451 avio_rb16(pb);
00452 av_dlog(s, "tag=%c%c%c%c (%08x) size=%d\n",
00453 (tag ) & 0xff,
00454 (tag >> 8) & 0xff,
00455 (tag >> 16) & 0xff,
00456 (tag >> 24) & 0xff,
00457 tag,
00458 tag_size);
00459 if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A'))
00460 return -1;
00461 switch(tag) {
00462 case MKTAG('P', 'R', 'O', 'P'):
00463
00464 avio_rb32(pb);
00465 avio_rb32(pb);
00466 avio_rb32(pb);
00467 avio_rb32(pb);
00468 avio_rb32(pb);
00469 avio_rb32(pb);
00470 avio_rb32(pb);
00471 indx_off = avio_rb32(pb);
00472 data_off = avio_rb32(pb);
00473 avio_rb16(pb);
00474 flags = avio_rb16(pb);
00475 break;
00476 case MKTAG('C', 'O', 'N', 'T'):
00477 rm_read_metadata(s, pb, 1);
00478 break;
00479 case MKTAG('M', 'D', 'P', 'R'):
00480 st = avformat_new_stream(s, NULL);
00481 if (!st)
00482 return AVERROR(ENOMEM);
00483 st->id = avio_rb16(pb);
00484 avio_rb32(pb);
00485 st->codec->bit_rate = avio_rb32(pb);
00486 avio_rb32(pb);
00487 avio_rb32(pb);
00488 start_time = avio_rb32(pb);
00489 avio_rb32(pb);
00490 duration = avio_rb32(pb);
00491 st->start_time = start_time;
00492 st->duration = duration;
00493 get_str8(pb, buf, sizeof(buf));
00494 get_str8(pb, buf, sizeof(buf));
00495 st->codec->codec_type = AVMEDIA_TYPE_DATA;
00496 st->priv_data = ff_rm_alloc_rmstream();
00497 if (ff_rm_read_mdpr_codecdata(s, s->pb, st, st->priv_data,
00498 avio_rb32(pb)) < 0)
00499 return -1;
00500 break;
00501 case MKTAG('D', 'A', 'T', 'A'):
00502 goto header_end;
00503 default:
00504
00505 avio_skip(pb, tag_size - 10);
00506 break;
00507 }
00508 }
00509 header_end:
00510 rm->nb_packets = avio_rb32(pb);
00511 if (!rm->nb_packets && (flags & 4))
00512 rm->nb_packets = 3600 * 25;
00513 avio_rb32(pb);
00514
00515 if (!data_off)
00516 data_off = avio_tell(pb) - 18;
00517 if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
00518 avio_seek(pb, indx_off, SEEK_SET) >= 0) {
00519 rm_read_index(s);
00520 avio_seek(pb, data_off + 18, SEEK_SET);
00521 }
00522
00523 return 0;
00524 }
00525
00526 static int get_num(AVIOContext *pb, int *len)
00527 {
00528 int n, n1;
00529
00530 n = avio_rb16(pb);
00531 (*len)-=2;
00532 n &= 0x7FFF;
00533 if (n >= 0x4000) {
00534 return n - 0x4000;
00535 } else {
00536 n1 = avio_rb16(pb);
00537 (*len)-=2;
00538 return (n << 16) | n1;
00539 }
00540 }
00541
00542
00543 #define RAW_PACKET_SIZE 1000
00544
00545 static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){
00546 RMDemuxContext *rm = s->priv_data;
00547 AVIOContext *pb = s->pb;
00548 AVStream *st;
00549 uint32_t state=0xFFFFFFFF;
00550
00551 while(!pb->eof_reached){
00552 int len, num, i;
00553 *pos= avio_tell(pb) - 3;
00554 if(rm->remaining_len > 0){
00555 num= rm->current_stream;
00556 len= rm->remaining_len;
00557 *timestamp = AV_NOPTS_VALUE;
00558 *flags= 0;
00559 }else{
00560 state= (state<<8) + avio_r8(pb);
00561
00562 if(state == MKBETAG('I', 'N', 'D', 'X')){
00563 int n_pkts, expected_len;
00564 len = avio_rb32(pb);
00565 avio_skip(pb, 2);
00566 n_pkts = avio_rb32(pb);
00567 expected_len = 20 + n_pkts * 14;
00568 if (len == 20)
00569
00570 len = expected_len;
00571 else if (len != expected_len)
00572 av_log(s, AV_LOG_WARNING,
00573 "Index size %d (%d pkts) is wrong, should be %d.\n",
00574 len, n_pkts, expected_len);
00575 len -= 14;
00576 if(len<0)
00577 continue;
00578 goto skip;
00579 } else if (state == MKBETAG('D','A','T','A')) {
00580 av_log(s, AV_LOG_WARNING,
00581 "DATA tag in middle of chunk, file may be broken.\n");
00582 }
00583
00584 if(state > (unsigned)0xFFFF || state <= 12)
00585 continue;
00586 len=state - 12;
00587 state= 0xFFFFFFFF;
00588
00589 num = avio_rb16(pb);
00590 *timestamp = avio_rb32(pb);
00591 avio_r8(pb);
00592 *flags = avio_r8(pb);
00593 }
00594 for(i=0;i<s->nb_streams;i++) {
00595 st = s->streams[i];
00596 if (num == st->id)
00597 break;
00598 }
00599 if (i == s->nb_streams) {
00600 skip:
00601
00602 avio_skip(pb, len);
00603 rm->remaining_len = 0;
00604 continue;
00605 }
00606 *stream_index= i;
00607
00608 return len;
00609 }
00610 return -1;
00611 }
00612
00613 static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
00614 RMDemuxContext *rm, RMStream *vst,
00615 AVPacket *pkt, int len, int *pseq,
00616 int64_t *timestamp)
00617 {
00618 int hdr, seq, pic_num, len2, pos;
00619 int type;
00620
00621 hdr = avio_r8(pb); len--;
00622 type = hdr >> 6;
00623
00624 if(type != 3){
00625 seq = avio_r8(pb); len--;
00626 }
00627 if(type != 1){
00628 len2 = get_num(pb, &len);
00629 pos = get_num(pb, &len);
00630 pic_num = avio_r8(pb); len--;
00631 }
00632 if(len<0)
00633 return -1;
00634 rm->remaining_len = len;
00635 if(type&1){
00636 if(type == 3){
00637 len= len2;
00638 *timestamp = pos;
00639 }
00640 if(rm->remaining_len < len)
00641 return -1;
00642 rm->remaining_len -= len;
00643 if(av_new_packet(pkt, len + 9) < 0)
00644 return AVERROR(EIO);
00645 pkt->data[0] = 0;
00646 AV_WL32(pkt->data + 1, 1);
00647 AV_WL32(pkt->data + 5, 0);
00648 avio_read(pb, pkt->data + 9, len);
00649 return 0;
00650 }
00651
00652
00653 *pseq = seq;
00654 if((seq & 0x7F) == 1 || vst->curpic_num != pic_num){
00655 vst->slices = ((hdr & 0x3F) << 1) + 1;
00656 vst->videobufsize = len2 + 8*vst->slices + 1;
00657 av_free_packet(&vst->pkt);
00658 if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
00659 return AVERROR(ENOMEM);
00660 vst->videobufpos = 8*vst->slices + 1;
00661 vst->cur_slice = 0;
00662 vst->curpic_num = pic_num;
00663 vst->pktpos = avio_tell(pb);
00664 }
00665 if(type == 2)
00666 len = FFMIN(len, pos);
00667
00668 if(++vst->cur_slice > vst->slices)
00669 return 1;
00670 AV_WL32(vst->pkt.data - 7 + 8*vst->cur_slice, 1);
00671 AV_WL32(vst->pkt.data - 3 + 8*vst->cur_slice, vst->videobufpos - 8*vst->slices - 1);
00672 if(vst->videobufpos + len > vst->videobufsize)
00673 return 1;
00674 if (avio_read(pb, vst->pkt.data + vst->videobufpos, len) != len)
00675 return AVERROR(EIO);
00676 vst->videobufpos += len;
00677 rm->remaining_len-= len;
00678
00679 if (type == 2 || vst->videobufpos == vst->videobufsize) {
00680 vst->pkt.data[0] = vst->cur_slice-1;
00681 *pkt= vst->pkt;
00682 vst->pkt.data= NULL;
00683 vst->pkt.size= 0;
00684 if(vst->slices != vst->cur_slice)
00685 memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
00686 vst->videobufpos - 1 - 8*vst->slices);
00687 pkt->size = vst->videobufpos + 8*(vst->cur_slice - vst->slices);
00688 pkt->pts = AV_NOPTS_VALUE;
00689 pkt->pos = vst->pktpos;
00690 vst->slices = 0;
00691 return 0;
00692 }
00693
00694 return 1;
00695 }
00696
00697 static inline void
00698 rm_ac3_swap_bytes (AVStream *st, AVPacket *pkt)
00699 {
00700 uint8_t *ptr;
00701 int j;
00702
00703 if (st->codec->codec_id == CODEC_ID_AC3) {
00704 ptr = pkt->data;
00705 for (j=0;j<pkt->size;j+=2) {
00706 FFSWAP(int, ptr[0], ptr[1]);
00707 ptr += 2;
00708 }
00709 }
00710 }
00711
00716 void ff_rm_reorder_sipr_data(uint8_t *buf, int sub_packet_h, int framesize)
00717 {
00718 int n, bs = sub_packet_h * framesize * 2 / 96;
00719
00720 for (n = 0; n < 38; n++) {
00721 int j;
00722 int i = bs * sipr_swaps[n][0];
00723 int o = bs * sipr_swaps[n][1];
00724
00725
00726 for (j = 0; j < bs; j++, i++, o++) {
00727 int x = (buf[i >> 1] >> (4 * (i & 1))) & 0xF,
00728 y = (buf[o >> 1] >> (4 * (o & 1))) & 0xF;
00729
00730 buf[o >> 1] = (x << (4 * (o & 1))) |
00731 (buf[o >> 1] & (0xF << (4 * !(o & 1))));
00732 buf[i >> 1] = (y << (4 * (i & 1))) |
00733 (buf[i >> 1] & (0xF << (4 * !(i & 1))));
00734 }
00735 }
00736 }
00737
00738 int
00739 ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
00740 AVStream *st, RMStream *ast, int len, AVPacket *pkt,
00741 int *seq, int flags, int64_t timestamp)
00742 {
00743 RMDemuxContext *rm = s->priv_data;
00744
00745 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00746 rm->current_stream= st->id;
00747 if(rm_assemble_video_frame(s, pb, rm, ast, pkt, len, seq, ×tamp))
00748 return -1;
00749 } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00750 if ((ast->deint_id == DEINT_ID_GENR) ||
00751 (ast->deint_id == DEINT_ID_INT4) ||
00752 (ast->deint_id == DEINT_ID_SIPR)) {
00753 int x;
00754 int sps = ast->sub_packet_size;
00755 int cfs = ast->coded_framesize;
00756 int h = ast->sub_packet_h;
00757 int y = ast->sub_packet_cnt;
00758 int w = ast->audio_framesize;
00759
00760 if (flags & 2)
00761 y = ast->sub_packet_cnt = 0;
00762 if (!y)
00763 ast->audiotimestamp = timestamp;
00764
00765 switch (ast->deint_id) {
00766 case DEINT_ID_INT4:
00767 for (x = 0; x < h/2; x++)
00768 avio_read(pb, ast->pkt.data+x*2*w+y*cfs, cfs);
00769 break;
00770 case DEINT_ID_GENR:
00771 for (x = 0; x < w/sps; x++)
00772 avio_read(pb, ast->pkt.data+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps);
00773 break;
00774 case DEINT_ID_SIPR:
00775 avio_read(pb, ast->pkt.data + y * w, w);
00776 break;
00777 }
00778
00779 if (++(ast->sub_packet_cnt) < h)
00780 return -1;
00781 if (ast->deint_id == DEINT_ID_SIPR)
00782 ff_rm_reorder_sipr_data(ast->pkt.data, h, w);
00783
00784 ast->sub_packet_cnt = 0;
00785 rm->audio_stream_num = st->index;
00786 rm->audio_pkt_cnt = h * w / st->codec->block_align;
00787 } else if ((ast->deint_id == DEINT_ID_VBRF) ||
00788 (ast->deint_id == DEINT_ID_VBRS)) {
00789 int x;
00790 rm->audio_stream_num = st->index;
00791 ast->sub_packet_cnt = (avio_rb16(pb) & 0xf0) >> 4;
00792 if (ast->sub_packet_cnt) {
00793 for (x = 0; x < ast->sub_packet_cnt; x++)
00794 ast->sub_packet_lengths[x] = avio_rb16(pb);
00795 rm->audio_pkt_cnt = ast->sub_packet_cnt;
00796 ast->audiotimestamp = timestamp;
00797 } else
00798 return -1;
00799 } else {
00800 av_get_packet(pb, pkt, len);
00801 rm_ac3_swap_bytes(st, pkt);
00802 }
00803 } else
00804 av_get_packet(pb, pkt, len);
00805
00806 pkt->stream_index = st->index;
00807
00808 #if 0
00809 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00810 if(st->codec->codec_id == CODEC_ID_RV20){
00811 int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
00812 av_log(s, AV_LOG_DEBUG, "%d %"PRId64" %d\n", *timestamp, *timestamp*512LL/25, seq);
00813
00814 seq |= (timestamp&~0x3FFF);
00815 if(seq - timestamp > 0x2000) seq -= 0x4000;
00816 if(seq - timestamp < -0x2000) seq += 0x4000;
00817 }
00818 }
00819 #endif
00820
00821 pkt->pts = timestamp;
00822 if (flags & 2)
00823 pkt->flags |= AV_PKT_FLAG_KEY;
00824
00825 return st->codec->codec_type == AVMEDIA_TYPE_AUDIO ? rm->audio_pkt_cnt : 0;
00826 }
00827
00828 int
00829 ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
00830 AVStream *st, RMStream *ast, AVPacket *pkt)
00831 {
00832 RMDemuxContext *rm = s->priv_data;
00833
00834 assert (rm->audio_pkt_cnt > 0);
00835
00836 if (ast->deint_id == DEINT_ID_VBRF ||
00837 ast->deint_id == DEINT_ID_VBRS)
00838 av_get_packet(pb, pkt, ast->sub_packet_lengths[ast->sub_packet_cnt - rm->audio_pkt_cnt]);
00839 else {
00840 av_new_packet(pkt, st->codec->block_align);
00841 memcpy(pkt->data, ast->pkt.data + st->codec->block_align *
00842 (ast->sub_packet_h * ast->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt),
00843 st->codec->block_align);
00844 }
00845 rm->audio_pkt_cnt--;
00846 if ((pkt->pts = ast->audiotimestamp) != AV_NOPTS_VALUE) {
00847 ast->audiotimestamp = AV_NOPTS_VALUE;
00848 pkt->flags = AV_PKT_FLAG_KEY;
00849 } else
00850 pkt->flags = 0;
00851 pkt->stream_index = st->index;
00852
00853 return rm->audio_pkt_cnt;
00854 }
00855
00856 static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
00857 {
00858 RMDemuxContext *rm = s->priv_data;
00859 AVStream *st;
00860 int i, len, res, seq = 1;
00861 int64_t timestamp, pos;
00862 int flags;
00863
00864 for (;;) {
00865 if (rm->audio_pkt_cnt) {
00866
00867 st = s->streams[rm->audio_stream_num];
00868 ff_rm_retrieve_cache(s, s->pb, st, st->priv_data, pkt);
00869 flags = 0;
00870 } else {
00871 if (rm->old_format) {
00872 RMStream *ast;
00873
00874 st = s->streams[0];
00875 ast = st->priv_data;
00876 timestamp = AV_NOPTS_VALUE;
00877 len = !ast->audio_framesize ? RAW_PACKET_SIZE :
00878 ast->coded_framesize * ast->sub_packet_h / 2;
00879 flags = (seq++ == 1) ? 2 : 0;
00880 pos = avio_tell(s->pb);
00881 } else {
00882 len=sync(s, ×tamp, &flags, &i, &pos);
00883 if (len > 0)
00884 st = s->streams[i];
00885 }
00886
00887 if(len<0 || s->pb->eof_reached)
00888 return AVERROR(EIO);
00889
00890 res = ff_rm_parse_packet (s, s->pb, st, st->priv_data, len, pkt,
00891 &seq, flags, timestamp);
00892 if((flags&2) && (seq&0x7F) == 1)
00893 av_add_index_entry(st, pos, timestamp, 0, 0, AVINDEX_KEYFRAME);
00894 if (res)
00895 continue;
00896 }
00897
00898 if( (st->discard >= AVDISCARD_NONKEY && !(flags&2))
00899 || st->discard >= AVDISCARD_ALL){
00900 av_free_packet(pkt);
00901 } else
00902 break;
00903 }
00904
00905 return 0;
00906 }
00907
00908 static int rm_read_close(AVFormatContext *s)
00909 {
00910 int i;
00911
00912 for (i=0;i<s->nb_streams;i++)
00913 ff_rm_free_rmstream(s->streams[i]->priv_data);
00914
00915 return 0;
00916 }
00917
00918 static int rm_probe(AVProbeData *p)
00919 {
00920
00921 if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
00922 p->buf[2] == 'M' && p->buf[3] == 'F' &&
00923 p->buf[4] == 0 && p->buf[5] == 0) ||
00924 (p->buf[0] == '.' && p->buf[1] == 'r' &&
00925 p->buf[2] == 'a' && p->buf[3] == 0xfd))
00926 return AVPROBE_SCORE_MAX;
00927 else
00928 return 0;
00929 }
00930
00931 static int64_t rm_read_dts(AVFormatContext *s, int stream_index,
00932 int64_t *ppos, int64_t pos_limit)
00933 {
00934 RMDemuxContext *rm = s->priv_data;
00935 int64_t pos, dts;
00936 int stream_index2, flags, len, h;
00937
00938 pos = *ppos;
00939
00940 if(rm->old_format)
00941 return AV_NOPTS_VALUE;
00942
00943 avio_seek(s->pb, pos, SEEK_SET);
00944 rm->remaining_len=0;
00945 for(;;){
00946 int seq=1;
00947 AVStream *st;
00948
00949 len=sync(s, &dts, &flags, &stream_index2, &pos);
00950 if(len<0)
00951 return AV_NOPTS_VALUE;
00952
00953 st = s->streams[stream_index2];
00954 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00955 h= avio_r8(s->pb); len--;
00956 if(!(h & 0x40)){
00957 seq = avio_r8(s->pb); len--;
00958 }
00959 }
00960
00961 if((flags&2) && (seq&0x7F) == 1){
00962
00963 av_add_index_entry(st, pos, dts, 0, 0, AVINDEX_KEYFRAME);
00964 if(stream_index2 == stream_index)
00965 break;
00966 }
00967
00968 avio_skip(s->pb, len);
00969 }
00970 *ppos = pos;
00971 return dts;
00972 }
00973
00974 AVInputFormat ff_rm_demuxer = {
00975 .name = "rm",
00976 .long_name = NULL_IF_CONFIG_SMALL("RealMedia format"),
00977 .priv_data_size = sizeof(RMDemuxContext),
00978 .read_probe = rm_probe,
00979 .read_header = rm_read_header,
00980 .read_packet = rm_read_packet,
00981 .read_close = rm_read_close,
00982 .read_timestamp = rm_read_dts,
00983 };
00984
00985 AVInputFormat ff_rdt_demuxer = {
00986 .name = "rdt",
00987 .long_name = NULL_IF_CONFIG_SMALL("RDT demuxer"),
00988 .priv_data_size = sizeof(RMDemuxContext),
00989 .read_close = rm_read_close,
00990 .flags = AVFMT_NOFILE,
00991 };