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00021 #include "avformat.h"
00022 #include <unistd.h>
00023
00024
00025 #define FFM_HEADER_SIZE 14
00026 #define PACKET_ID 0x666d
00027
00028
00029 #define FRAME_HEADER_SIZE 8
00030 #define FLAG_KEY_FRAME 0x01
00031
00032 typedef struct FFMStream {
00033 int64_t pts;
00034 } FFMStream;
00035
00036 enum {
00037 READ_HEADER,
00038 READ_DATA,
00039 };
00040
00041 typedef struct FFMContext {
00042
00043 offset_t write_index, file_size;
00044 int read_state;
00045 uint8_t header[FRAME_HEADER_SIZE];
00046
00047
00048 int first_packet;
00049 int first_frame_in_packet;
00050 int packet_size;
00051 int frame_offset;
00052 int64_t pts;
00053 uint8_t *packet_ptr, *packet_end;
00054 uint8_t packet[FFM_PACKET_SIZE];
00055 } FFMContext;
00056
00057 static int64_t get_pts(AVFormatContext *s, offset_t pos);
00058
00059
00060 int ffm_nopts = 0;
00061
00062 #ifdef CONFIG_MUXERS
00063 static void flush_packet(AVFormatContext *s)
00064 {
00065 FFMContext *ffm = s->priv_data;
00066 int fill_size, h;
00067 ByteIOContext *pb = s->pb;
00068
00069 fill_size = ffm->packet_end - ffm->packet_ptr;
00070 memset(ffm->packet_ptr, 0, fill_size);
00071
00072 if (url_ftell(pb) % ffm->packet_size)
00073 av_abort();
00074
00075
00076 put_be16(pb, PACKET_ID);
00077 put_be16(pb, fill_size);
00078 put_be64(pb, ffm->pts);
00079 h = ffm->frame_offset;
00080 if (ffm->first_packet)
00081 h |= 0x8000;
00082 put_be16(pb, h);
00083 put_buffer(pb, ffm->packet, ffm->packet_end - ffm->packet);
00084 put_flush_packet(pb);
00085
00086
00087 ffm->frame_offset = 0;
00088 ffm->pts = 0;
00089 ffm->packet_ptr = ffm->packet;
00090 ffm->first_packet = 0;
00091 }
00092
00093
00094 static void ffm_write_data(AVFormatContext *s,
00095 const uint8_t *buf, int size,
00096 int64_t pts, int first)
00097 {
00098 FFMContext *ffm = s->priv_data;
00099 int len;
00100
00101 if (first && ffm->frame_offset == 0)
00102 ffm->frame_offset = ffm->packet_ptr - ffm->packet + FFM_HEADER_SIZE;
00103 if (first && ffm->pts == 0)
00104 ffm->pts = pts;
00105
00106
00107 while (size > 0) {
00108 len = ffm->packet_end - ffm->packet_ptr;
00109 if (len > size)
00110 len = size;
00111 memcpy(ffm->packet_ptr, buf, len);
00112
00113 ffm->packet_ptr += len;
00114 buf += len;
00115 size -= len;
00116 if (ffm->packet_ptr >= ffm->packet_end) {
00117
00118 if (ffm->pts == 0)
00119 ffm->pts = pts;
00120
00121 flush_packet(s);
00122 }
00123 }
00124 }
00125
00126 static int ffm_write_header(AVFormatContext *s)
00127 {
00128 FFMContext *ffm = s->priv_data;
00129 AVStream *st;
00130 FFMStream *fst;
00131 ByteIOContext *pb = s->pb;
00132 AVCodecContext *codec;
00133 int bit_rate, i;
00134
00135 ffm->packet_size = FFM_PACKET_SIZE;
00136
00137
00138 put_le32(pb, MKTAG('F', 'F', 'M', '1'));
00139 put_be32(pb, ffm->packet_size);
00140
00141 put_be64(pb, ffm->packet_size);
00142
00143 put_be32(pb, s->nb_streams);
00144 bit_rate = 0;
00145 for(i=0;i<s->nb_streams;i++) {
00146 st = s->streams[i];
00147 bit_rate += st->codec->bit_rate;
00148 }
00149 put_be32(pb, bit_rate);
00150
00151
00152 for(i=0;i<s->nb_streams;i++) {
00153 st = s->streams[i];
00154 fst = av_mallocz(sizeof(FFMStream));
00155 if (!fst)
00156 goto fail;
00157 av_set_pts_info(st, 64, 1, 1000000);
00158 st->priv_data = fst;
00159
00160 codec = st->codec;
00161
00162 put_be32(pb, codec->codec_id);
00163 put_byte(pb, codec->codec_type);
00164 put_be32(pb, codec->bit_rate);
00165 put_be32(pb, st->quality);
00166 put_be32(pb, codec->flags);
00167 put_be32(pb, codec->flags2);
00168 put_be32(pb, codec->debug);
00169
00170 switch(codec->codec_type) {
00171 case CODEC_TYPE_VIDEO:
00172 put_be32(pb, codec->time_base.num);
00173 put_be32(pb, codec->time_base.den);
00174 put_be16(pb, codec->width);
00175 put_be16(pb, codec->height);
00176 put_be16(pb, codec->gop_size);
00177 put_be32(pb, codec->pix_fmt);
00178 put_byte(pb, codec->qmin);
00179 put_byte(pb, codec->qmax);
00180 put_byte(pb, codec->max_qdiff);
00181 put_be16(pb, (int) (codec->qcompress * 10000.0));
00182 put_be16(pb, (int) (codec->qblur * 10000.0));
00183 put_be32(pb, codec->bit_rate_tolerance);
00184 put_strz(pb, codec->rc_eq);
00185 put_be32(pb, codec->rc_max_rate);
00186 put_be32(pb, codec->rc_min_rate);
00187 put_be32(pb, codec->rc_buffer_size);
00188 put_be64(pb, av_dbl2int(codec->i_quant_factor));
00189 put_be64(pb, av_dbl2int(codec->b_quant_factor));
00190 put_be64(pb, av_dbl2int(codec->i_quant_offset));
00191 put_be64(pb, av_dbl2int(codec->b_quant_offset));
00192 put_be32(pb, codec->dct_algo);
00193 put_be32(pb, codec->strict_std_compliance);
00194 put_be32(pb, codec->max_b_frames);
00195 put_be32(pb, codec->luma_elim_threshold);
00196 put_be32(pb, codec->chroma_elim_threshold);
00197 put_be32(pb, codec->mpeg_quant);
00198 put_be32(pb, codec->intra_dc_precision);
00199 put_be32(pb, codec->me_method);
00200 put_be32(pb, codec->mb_decision);
00201 put_be32(pb, codec->nsse_weight);
00202 put_be32(pb, codec->frame_skip_cmp);
00203 put_be64(pb, av_dbl2int(codec->rc_buffer_aggressivity));
00204 put_be32(pb, codec->codec_tag);
00205 break;
00206 case CODEC_TYPE_AUDIO:
00207 put_be32(pb, codec->sample_rate);
00208 put_le16(pb, codec->channels);
00209 put_le16(pb, codec->frame_size);
00210 break;
00211 default:
00212 return -1;
00213 }
00214
00215 if (ffm_nopts)
00216 fst->pts = 0;
00217 else
00218 fst->pts = av_gettime();
00219 }
00220
00221
00222 while ((url_ftell(pb) % ffm->packet_size) != 0)
00223 put_byte(pb, 0);
00224
00225 put_flush_packet(pb);
00226
00227
00228 ffm->packet_ptr = ffm->packet;
00229 ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE;
00230 assert(ffm->packet_end >= ffm->packet);
00231 ffm->frame_offset = 0;
00232 ffm->pts = 0;
00233 ffm->first_packet = 1;
00234
00235 return 0;
00236 fail:
00237 for(i=0;i<s->nb_streams;i++) {
00238 st = s->streams[i];
00239 av_freep(&st->priv_data);
00240 }
00241 return -1;
00242 }
00243
00244 static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
00245 {
00246 AVStream *st = s->streams[pkt->stream_index];
00247 FFMStream *fst = st->priv_data;
00248 int64_t pts;
00249 uint8_t header[FRAME_HEADER_SIZE];
00250 int duration;
00251 int size= pkt->size;
00252
00253
00254 if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
00255 duration = ((float)st->codec->frame_size / st->codec->sample_rate * 1000000.0);
00256 } else {
00257 duration = (1000000.0 * st->codec->time_base.num / (float)st->codec->time_base.den);
00258 }
00259
00260 pts = fst->pts;
00261
00262 header[0] = pkt->stream_index;
00263 header[1] = 0;
00264 if (pkt->flags & PKT_FLAG_KEY)
00265 header[1] |= FLAG_KEY_FRAME;
00266 header[2] = (size >> 16) & 0xff;
00267 header[3] = (size >> 8) & 0xff;
00268 header[4] = size & 0xff;
00269 header[5] = (duration >> 16) & 0xff;
00270 header[6] = (duration >> 8) & 0xff;
00271 header[7] = duration & 0xff;
00272 ffm_write_data(s, header, FRAME_HEADER_SIZE, pts, 1);
00273 ffm_write_data(s, pkt->data, size, pts, 0);
00274
00275 fst->pts += duration;
00276 return 0;
00277 }
00278
00279 static int ffm_write_trailer(AVFormatContext *s)
00280 {
00281 ByteIOContext *pb = s->pb;
00282 FFMContext *ffm = s->priv_data;
00283
00284
00285 if (ffm->packet_ptr > ffm->packet)
00286 flush_packet(s);
00287
00288 put_flush_packet(pb);
00289
00290 if (!url_is_streamed(pb)) {
00291 int64_t size;
00292
00293 size = url_ftell(pb);
00294 url_fseek(pb, 8, SEEK_SET);
00295 put_be64(pb, size);
00296 put_flush_packet(pb);
00297 }
00298
00299 return 0;
00300 }
00301 #endif //CONFIG_MUXERS
00302
00303
00304
00305 static int ffm_is_avail_data(AVFormatContext *s, int size)
00306 {
00307 FFMContext *ffm = s->priv_data;
00308 offset_t pos, avail_size;
00309 int len;
00310
00311 len = ffm->packet_end - ffm->packet_ptr;
00312 if (!ffm_nopts) {
00313
00314 if (size <= len)
00315 return 1;
00316 }
00317 pos = url_ftell(s->pb);
00318 if (pos == ffm->write_index) {
00319
00320 return 0;
00321 } else if (pos < ffm->write_index) {
00322 avail_size = ffm->write_index - pos;
00323 } else {
00324 avail_size = (ffm->file_size - pos) + (ffm->write_index - FFM_PACKET_SIZE);
00325 }
00326 avail_size = (avail_size / ffm->packet_size) * (ffm->packet_size - FFM_HEADER_SIZE) + len;
00327 if (size <= avail_size)
00328 return 1;
00329 else
00330 return 0;
00331 }
00332
00333
00334 static int ffm_read_data(AVFormatContext *s,
00335 uint8_t *buf, int size, int first)
00336 {
00337 FFMContext *ffm = s->priv_data;
00338 ByteIOContext *pb = s->pb;
00339 int len, fill_size, size1, frame_offset;
00340
00341 size1 = size;
00342 while (size > 0) {
00343 redo:
00344 len = ffm->packet_end - ffm->packet_ptr;
00345 if (len > size)
00346 len = size;
00347 if (len == 0) {
00348 if (url_ftell(pb) == ffm->file_size)
00349 url_fseek(pb, ffm->packet_size, SEEK_SET);
00350 retry_read:
00351 get_be16(pb);
00352 fill_size = get_be16(pb);
00353 ffm->pts = get_be64(pb);
00354 ffm->first_frame_in_packet = 1;
00355 frame_offset = get_be16(pb);
00356 get_buffer(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
00357 ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size);
00358 if (ffm->packet_end < ffm->packet)
00359 return -1;
00360
00361
00362 if (ffm->first_packet || (frame_offset & 0x8000)) {
00363 if (!frame_offset) {
00364
00365 if (url_ftell(pb) >= ffm->packet_size * 3) {
00366 url_fseek(pb, -ffm->packet_size * 2, SEEK_CUR);
00367 goto retry_read;
00368 }
00369
00370 return 0;
00371 }
00372 ffm->first_packet = 0;
00373 if ((frame_offset & 0x7ffff) < FFM_HEADER_SIZE)
00374 return -1;
00375 ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
00376 if (!first)
00377 break;
00378 } else {
00379 ffm->packet_ptr = ffm->packet;
00380 }
00381 goto redo;
00382 }
00383 memcpy(buf, ffm->packet_ptr, len);
00384 buf += len;
00385 ffm->packet_ptr += len;
00386 size -= len;
00387 first = 0;
00388 }
00389 return size1 - size;
00390 }
00391
00392
00393 static void adjust_write_index(AVFormatContext *s)
00394 {
00395 FFMContext *ffm = s->priv_data;
00396 ByteIOContext *pb = s->pb;
00397 int64_t pts;
00398
00399 offset_t pos_min, pos_max;
00400 int64_t pts_start;
00401 offset_t ptr = url_ftell(pb);
00402
00403
00404 pos_min = 0;
00405 pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
00406
00407 pts_start = get_pts(s, pos_min);
00408
00409 pts = get_pts(s, pos_max);
00410
00411 if (pts - 100000 > pts_start)
00412 goto end;
00413
00414 ffm->write_index = FFM_PACKET_SIZE;
00415
00416 pts_start = get_pts(s, pos_min);
00417
00418 pts = get_pts(s, pos_max);
00419
00420 if (pts - 100000 <= pts_start) {
00421 while (1) {
00422 offset_t newpos;
00423 int64_t newpts;
00424
00425 newpos = ((pos_max + pos_min) / (2 * FFM_PACKET_SIZE)) * FFM_PACKET_SIZE;
00426
00427 if (newpos == pos_min)
00428 break;
00429
00430 newpts = get_pts(s, newpos);
00431
00432 if (newpts - 100000 <= pts) {
00433 pos_max = newpos;
00434 pts = newpts;
00435 } else {
00436 pos_min = newpos;
00437 }
00438 }
00439 ffm->write_index += pos_max;
00440 }
00441
00442
00443
00444
00445 end:
00446 url_fseek(pb, ptr, SEEK_SET);
00447 }
00448
00449
00450 static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
00451 {
00452 FFMContext *ffm = s->priv_data;
00453 AVStream *st;
00454 FFMStream *fst;
00455 ByteIOContext *pb = s->pb;
00456 AVCodecContext *codec;
00457 int i, nb_streams;
00458 uint32_t tag;
00459
00460
00461 tag = get_le32(pb);
00462 if (tag != MKTAG('F', 'F', 'M', '1'))
00463 goto fail;
00464 ffm->packet_size = get_be32(pb);
00465 if (ffm->packet_size != FFM_PACKET_SIZE)
00466 goto fail;
00467 ffm->write_index = get_be64(pb);
00468
00469 if (!url_is_streamed(pb)) {
00470 ffm->file_size = url_fsize(pb);
00471 adjust_write_index(s);
00472 } else {
00473 ffm->file_size = (UINT64_C(1) << 63) - 1;
00474 }
00475
00476 nb_streams = get_be32(pb);
00477 get_be32(pb);
00478
00479 for(i=0;i<nb_streams;i++) {
00480 char rc_eq_buf[128];
00481
00482 st = av_new_stream(s, 0);
00483 if (!st)
00484 goto fail;
00485 fst = av_mallocz(sizeof(FFMStream));
00486 if (!fst)
00487 goto fail;
00488 s->streams[i] = st;
00489
00490 av_set_pts_info(st, 64, 1, 1000000);
00491
00492 st->priv_data = fst;
00493
00494 codec = st->codec;
00495
00496 codec->codec_id = get_be32(pb);
00497 codec->codec_type = get_byte(pb);
00498 codec->bit_rate = get_be32(pb);
00499 st->quality = get_be32(pb);
00500 codec->flags = get_be32(pb);
00501 codec->flags2 = get_be32(pb);
00502 codec->debug = get_be32(pb);
00503
00504 switch(codec->codec_type) {
00505 case CODEC_TYPE_VIDEO:
00506 codec->time_base.num = get_be32(pb);
00507 codec->time_base.den = get_be32(pb);
00508 codec->width = get_be16(pb);
00509 codec->height = get_be16(pb);
00510 codec->gop_size = get_be16(pb);
00511 codec->pix_fmt = get_be32(pb);
00512 codec->qmin = get_byte(pb);
00513 codec->qmax = get_byte(pb);
00514 codec->max_qdiff = get_byte(pb);
00515 codec->qcompress = get_be16(pb) / 10000.0;
00516 codec->qblur = get_be16(pb) / 10000.0;
00517 codec->bit_rate_tolerance = get_be32(pb);
00518 codec->rc_eq = av_strdup(get_strz(pb, rc_eq_buf, sizeof(rc_eq_buf)));
00519 codec->rc_max_rate = get_be32(pb);
00520 codec->rc_min_rate = get_be32(pb);
00521 codec->rc_buffer_size = get_be32(pb);
00522 codec->i_quant_factor = av_int2dbl(get_be64(pb));
00523 codec->b_quant_factor = av_int2dbl(get_be64(pb));
00524 codec->i_quant_offset = av_int2dbl(get_be64(pb));
00525 codec->b_quant_offset = av_int2dbl(get_be64(pb));
00526 codec->dct_algo = get_be32(pb);
00527 codec->strict_std_compliance = get_be32(pb);
00528 codec->max_b_frames = get_be32(pb);
00529 codec->luma_elim_threshold = get_be32(pb);
00530 codec->chroma_elim_threshold = get_be32(pb);
00531 codec->mpeg_quant = get_be32(pb);
00532 codec->intra_dc_precision = get_be32(pb);
00533 codec->me_method = get_be32(pb);
00534 codec->mb_decision = get_be32(pb);
00535 codec->nsse_weight = get_be32(pb);
00536 codec->frame_skip_cmp = get_be32(pb);
00537 codec->rc_buffer_aggressivity = av_int2dbl(get_be64(pb));
00538 codec->codec_tag = get_be32(pb);
00539 break;
00540 case CODEC_TYPE_AUDIO:
00541 codec->sample_rate = get_be32(pb);
00542 codec->channels = get_le16(pb);
00543 codec->frame_size = get_le16(pb);
00544 break;
00545 default:
00546 goto fail;
00547 }
00548
00549 }
00550
00551
00552 while ((url_ftell(pb) % ffm->packet_size) != 0)
00553 get_byte(pb);
00554
00555
00556 ffm->packet_ptr = ffm->packet;
00557 ffm->packet_end = ffm->packet;
00558 ffm->frame_offset = 0;
00559 ffm->pts = 0;
00560 ffm->read_state = READ_HEADER;
00561 ffm->first_packet = 1;
00562 return 0;
00563 fail:
00564 for(i=0;i<s->nb_streams;i++) {
00565 st = s->streams[i];
00566 if (st) {
00567 av_freep(&st->priv_data);
00568 av_free(st);
00569 }
00570 }
00571 return -1;
00572 }
00573
00574
00575 static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
00576 {
00577 int size;
00578 FFMContext *ffm = s->priv_data;
00579 int duration;
00580
00581 switch(ffm->read_state) {
00582 case READ_HEADER:
00583 if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE)) {
00584 return AVERROR(EAGAIN);
00585 }
00586 #if 0
00587 printf("pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
00588 url_ftell(s->pb), s->pb.pos, ffm->write_index, ffm->file_size);
00589 #endif
00590 if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
00591 FRAME_HEADER_SIZE)
00592 return AVERROR(EAGAIN);
00593 #if 0
00594 {
00595 int i;
00596 for(i=0;i<FRAME_HEADER_SIZE;i++)
00597 printf("%02x ", ffm->header[i]);
00598 printf("\n");
00599 }
00600 #endif
00601 ffm->read_state = READ_DATA;
00602
00603 case READ_DATA:
00604 size = AV_RB24(ffm->header + 2);
00605 if (!ffm_is_avail_data(s, size)) {
00606 return AVERROR(EAGAIN);
00607 }
00608
00609 duration = AV_RB24(ffm->header + 5);
00610
00611 av_new_packet(pkt, size);
00612 pkt->stream_index = ffm->header[0];
00613 pkt->pos = url_ftell(s->pb);
00614 if (ffm->header[1] & FLAG_KEY_FRAME)
00615 pkt->flags |= PKT_FLAG_KEY;
00616
00617 ffm->read_state = READ_HEADER;
00618 if (ffm_read_data(s, pkt->data, size, 0) != size) {
00619
00620 av_free_packet(pkt);
00621 return AVERROR(EAGAIN);
00622 }
00623 if (ffm->first_frame_in_packet)
00624 {
00625 pkt->pts = ffm->pts;
00626 ffm->first_frame_in_packet = 0;
00627 }
00628 pkt->duration = duration;
00629 break;
00630 }
00631 return 0;
00632 }
00633
00634
00635
00636
00637
00638 static void ffm_seek1(AVFormatContext *s, offset_t pos1)
00639 {
00640 FFMContext *ffm = s->priv_data;
00641 ByteIOContext *pb = s->pb;
00642 offset_t pos;
00643
00644 pos = pos1 + ffm->write_index;
00645 if (pos >= ffm->file_size)
00646 pos -= (ffm->file_size - FFM_PACKET_SIZE);
00647 #ifdef DEBUG_SEEK
00648 printf("seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
00649 #endif
00650 url_fseek(pb, pos, SEEK_SET);
00651 }
00652
00653 static int64_t get_pts(AVFormatContext *s, offset_t pos)
00654 {
00655 ByteIOContext *pb = s->pb;
00656 int64_t pts;
00657
00658 ffm_seek1(s, pos);
00659 url_fskip(pb, 4);
00660 pts = get_be64(pb);
00661 #ifdef DEBUG_SEEK
00662 printf("pts=%0.6f\n", pts / 1000000.0);
00663 #endif
00664 return pts;
00665 }
00666
00667
00668
00669
00670 static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, int flags)
00671 {
00672 FFMContext *ffm = s->priv_data;
00673 offset_t pos_min, pos_max, pos;
00674 int64_t pts_min, pts_max, pts;
00675 double pos1;
00676
00677 #ifdef DEBUG_SEEK
00678 printf("wanted_pts=%0.6f\n", wanted_pts / 1000000.0);
00679 #endif
00680
00681
00682 pos_min = 0;
00683 pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
00684 while (pos_min <= pos_max) {
00685 pts_min = get_pts(s, pos_min);
00686 pts_max = get_pts(s, pos_max);
00687
00688 pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
00689 (double)(pts_max - pts_min);
00690 pos = (((int64_t)pos1) / FFM_PACKET_SIZE) * FFM_PACKET_SIZE;
00691 if (pos <= pos_min)
00692 pos = pos_min;
00693 else if (pos >= pos_max)
00694 pos = pos_max;
00695 pts = get_pts(s, pos);
00696
00697 if (pts == wanted_pts) {
00698 goto found;
00699 } else if (pts > wanted_pts) {
00700 pos_max = pos - FFM_PACKET_SIZE;
00701 } else {
00702 pos_min = pos + FFM_PACKET_SIZE;
00703 }
00704 }
00705 pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
00706 if (pos > 0)
00707 pos -= FFM_PACKET_SIZE;
00708 found:
00709 ffm_seek1(s, pos);
00710 return 0;
00711 }
00712
00713 #ifdef CONFIG_FFSERVER
00714 offset_t ffm_read_write_index(int fd)
00715 {
00716 uint8_t buf[8];
00717
00718 lseek(fd, 8, SEEK_SET);
00719 read(fd, buf, 8);
00720 return AV_RB64(buf);
00721 }
00722
00723 void ffm_write_write_index(int fd, offset_t pos)
00724 {
00725 uint8_t buf[8];
00726 int i;
00727
00728 for(i=0;i<8;i++)
00729 buf[i] = (pos >> (56 - i * 8)) & 0xff;
00730 lseek(fd, 8, SEEK_SET);
00731 write(fd, buf, 8);
00732 }
00733
00734 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size)
00735 {
00736 FFMContext *ffm = s->priv_data;
00737 ffm->write_index = pos;
00738 ffm->file_size = file_size;
00739 }
00740 #endif // CONFIG_FFSERVER
00741
00742 static int ffm_read_close(AVFormatContext *s)
00743 {
00744 AVStream *st;
00745 int i;
00746
00747 for(i=0;i<s->nb_streams;i++) {
00748 st = s->streams[i];
00749 av_freep(&st->priv_data);
00750 }
00751 return 0;
00752 }
00753
00754 static int ffm_probe(AVProbeData *p)
00755 {
00756 if (
00757 p->buf[0] == 'F' && p->buf[1] == 'F' && p->buf[2] == 'M' &&
00758 p->buf[3] == '1')
00759 return AVPROBE_SCORE_MAX + 1;
00760 return 0;
00761 }
00762
00763 #ifdef CONFIG_FFM_DEMUXER
00764 AVInputFormat ffm_demuxer = {
00765 "ffm",
00766 "ffm format",
00767 sizeof(FFMContext),
00768 ffm_probe,
00769 ffm_read_header,
00770 ffm_read_packet,
00771 ffm_read_close,
00772 ffm_seek,
00773 };
00774 #endif
00775 #ifdef CONFIG_FFM_MUXER
00776 AVOutputFormat ffm_muxer = {
00777 "ffm",
00778 "ffm format",
00779 "",
00780 "ffm",
00781 sizeof(FFMContext),
00782
00783 CODEC_ID_MP2,
00784 CODEC_ID_MPEG1VIDEO,
00785 ffm_write_header,
00786 ffm_write_packet,
00787 ffm_write_trailer,
00788 };
00789 #endif //CONFIG_FFM_MUXER