/* * ASF compatible demuxer * Copyright (c) 2000, 2001 Fabrice Bellard. * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "avformat.h" #include "riff.h" #include "mpegaudio.h" #include "asf.h" #include "common.h" #include "asfcrypt.h" extern void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format); #undef NDEBUG #include <assert.h> #define FRAME_HEADER_SIZE 17 // Fix Me! FRAME_HEADER_SIZE may be different. static const GUID index_guid = { 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb }; static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */ 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2 }; /**********************************/ /* decoding */ //#define DEBUG #ifdef DEBUG #define PRINT_IF_GUID(g,cmp) \ if (!memcmp(g, &cmp, sizeof(GUID))) \ printf("(GUID: %s) ", #cmp) static void print_guid(const GUID *g) { int i; PRINT_IF_GUID(g, asf_header); else PRINT_IF_GUID(g, file_header); else PRINT_IF_GUID(g, stream_header); else PRINT_IF_GUID(g, audio_stream); else PRINT_IF_GUID(g, audio_conceal_none); else PRINT_IF_GUID(g, video_stream); else PRINT_IF_GUID(g, video_conceal_none); else PRINT_IF_GUID(g, command_stream); else PRINT_IF_GUID(g, comment_header); else PRINT_IF_GUID(g, codec_comment_header); else PRINT_IF_GUID(g, codec_comment1_header); else PRINT_IF_GUID(g, data_header); else PRINT_IF_GUID(g, index_guid); else PRINT_IF_GUID(g, head1_guid); else PRINT_IF_GUID(g, head2_guid); else PRINT_IF_GUID(g, my_guid); else PRINT_IF_GUID(g, ext_stream_header); else PRINT_IF_GUID(g, extended_content_header); else PRINT_IF_GUID(g, ext_stream_embed_stream_header); else PRINT_IF_GUID(g, ext_stream_audio_stream); else PRINT_IF_GUID(g, metadata_header); else PRINT_IF_GUID(g, stream_bitrate_guid); else printf("(GUID: unknown) "); for(i=0;i<16;i++) printf(" 0x%02x,", (*g)[i]); printf("}\n"); } #undef PRINT_IF_GUID #endif static void get_guid(ByteIOContext *s, GUID *g) { assert(sizeof(*g) == 16); get_buffer(s, *g, sizeof(*g)); } #if 0 static void get_str16(ByteIOContext *pb, char *buf, int buf_size) { int len, c; char *q; len = get_le16(pb); q = buf; while (len > 0) { c = get_le16(pb); if ((q - buf) < buf_size - 1) *q++ = c; len--; } *q = '\0'; } #endif static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size) { char* q = buf; len /= 2; while (len--) { uint8_t tmp; PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;) } *q = '\0'; } static int asf_probe(AVProbeData *pd) { /* check file header */ if (!memcmp(pd->buf, &asf_header, sizeof(GUID))) return AVPROBE_SCORE_MAX; else return 0; } static int get_value(ByteIOContext *pb, int type){ switch(type){ case 2: return get_le32(pb); case 3: return get_le32(pb); case 4: return get_le64(pb); case 5: return get_le16(pb); default:return INT_MIN; } } static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap) { ASFContext *asf = s->priv_data; GUID g; ByteIOContext *pb = s->pb; AVStream *st; ASFStream *asf_st; int size, i; int64_t gsize; AVRational dar[128]; uint32_t bitrate[128]; memset(dar, 0, sizeof(dar)); memset(bitrate, 0, sizeof(bitrate)); get_guid(pb, &g); if (memcmp(&g, &asf_header, sizeof(GUID))) goto fail; get_le64(pb); get_le32(pb); get_byte(pb); get_byte(pb); memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); for(;;) { get_guid(pb, &g); gsize = get_le64(pb); #ifdef DEBUG printf("%08"PRIx64": ", url_ftell(pb) - 24); print_guid(&g); printf(" size=0x%"PRIx64"\n", gsize); #endif if (!memcmp(&g, &data_header, sizeof(GUID))) { asf->data_object_offset = url_ftell(pb); // if not streaming, gsize is not unlimited (how?), and there is enough space in the file.. if (!(asf->hdr.flags & 0x01) && gsize >= 100) { asf->data_object_size = gsize - 24; } else { asf->data_object_size = (uint64_t)-1; } break; } if (gsize < 24) goto fail; if (!memcmp(&g, &file_header, sizeof(GUID))) { get_guid(pb, &asf->hdr.guid); asf->hdr.file_size = get_le64(pb); asf->hdr.create_time = get_le64(pb); asf->nb_packets = get_le64(pb); asf->hdr.send_time = get_le64(pb); asf->hdr.play_time = get_le64(pb); asf->hdr.preroll = get_le32(pb); asf->hdr.ignore = get_le32(pb); asf->hdr.flags = get_le32(pb); asf->hdr.min_pktsize = get_le32(pb); asf->hdr.max_pktsize = get_le32(pb); asf->hdr.max_bitrate = get_le32(pb); asf->packet_size = asf->hdr.max_pktsize; } else if (!memcmp(&g, &stream_header, sizeof(GUID))) { int type, type_specific_size, sizeX; uint64_t total_size; unsigned int tag1; int64_t pos1, pos2, start_time; int test_for_ext_stream_audio, is_dvr_ms_audio=0; pos1 = url_ftell(pb); st = av_new_stream(s, 0); if (!st) goto fail; av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ asf_st = av_mallocz(sizeof(ASFStream)); if (!asf_st) goto fail; st->priv_data = asf_st; start_time = asf->hdr.preroll; if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming... st->duration = asf->hdr.send_time / (10000000 / 1000) - start_time; } get_guid(pb, &g); test_for_ext_stream_audio = 0; if (!memcmp(&g, &audio_stream, sizeof(GUID))) { type = CODEC_TYPE_AUDIO; } else if (!memcmp(&g, &video_stream, sizeof(GUID))) { type = CODEC_TYPE_VIDEO; } else if (!memcmp(&g, &command_stream, sizeof(GUID))) { type = CODEC_TYPE_UNKNOWN; } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) { test_for_ext_stream_audio = 1; type = CODEC_TYPE_UNKNOWN; } else { goto fail; } get_guid(pb, &g); total_size = get_le64(pb); type_specific_size = get_le32(pb); get_le32(pb); st->id = get_le16(pb) & 0x7f; /* stream id */ // mapping of asf ID to AV stream ID; asf->asfid2avid[st->id] = s->nb_streams - 1; get_le32(pb); if (test_for_ext_stream_audio) { get_guid(pb, &g); if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) { type = CODEC_TYPE_AUDIO; is_dvr_ms_audio=1; get_guid(pb, &g); get_le32(pb); get_le32(pb); get_le32(pb); get_guid(pb, &g); get_le32(pb); } } st->codec->codec_type = type; if (type == CODEC_TYPE_AUDIO) { get_wav_header(pb, st->codec, type_specific_size); if (is_dvr_ms_audio) { // codec_id and codec_tag are unreliable in dvr_ms // files. Set them later by probing stream. st->codec->codec_id = CODEC_ID_NONE; st->codec->codec_tag = 0; } st->need_parsing = AVSTREAM_PARSE_FULL; /* We have to init the frame size at some point .... */ pos2 = url_ftell(pb); if (gsize >= (pos2 + 8 - pos1 + 24)) { asf_st->ds_span = get_byte(pb); asf_st->ds_packet_size = get_le16(pb); asf_st->ds_chunk_size = get_le16(pb); get_le16(pb); //ds_data_size get_byte(pb); //ds_silence_data } //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n", // asf_st->ds_packet_size, asf_st->ds_chunk_size, // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data); if (asf_st->ds_span > 1) { if (!asf_st->ds_chunk_size || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1) || asf_st->ds_packet_size % asf_st->ds_chunk_size) asf_st->ds_span = 0; // disable descrambling } switch (st->codec->codec_id) { case CODEC_ID_MP3: st->codec->frame_size = MPA_FRAME_SIZE; break; case CODEC_ID_PCM_S16LE: case CODEC_ID_PCM_S16BE: case CODEC_ID_PCM_U16LE: case CODEC_ID_PCM_U16BE: case CODEC_ID_PCM_S8: case CODEC_ID_PCM_U8: case CODEC_ID_PCM_ALAW: case CODEC_ID_PCM_MULAW: st->codec->frame_size = 1; break; default: /* This is probably wrong, but it prevents a crash later */ st->codec->frame_size = 1; break; } } else if (type == CODEC_TYPE_VIDEO) { get_le32(pb); get_le32(pb); get_byte(pb); size = get_le16(pb); /* size */ sizeX= get_le32(pb); /* size */ st->codec->width = get_le32(pb); st->codec->height = get_le32(pb); /* not available for asf */ get_le16(pb); /* panes */ st->codec->bits_per_sample = get_le16(pb); /* depth */ tag1 = get_le32(pb); url_fskip(pb, 20); // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX); size= sizeX; if (size > 40) { st->codec->extradata_size = size - 40; st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); get_buffer(pb, st->codec->extradata, st->codec->extradata_size); } /* Extract palette from extradata if bpp <= 8 */ /* This code assumes that extradata contains only palette */ /* This is true for all paletted codecs implemented in ffmpeg */ if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) { st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl)); #ifdef WORDS_BIGENDIAN for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++) st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]); #else memcpy(st->codec->palctrl->palette, st->codec->extradata, FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); #endif st->codec->palctrl->palette_changed = 1; } st->codec->codec_tag = tag1; st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1); if(tag1 == MKTAG('D', 'V', 'R', ' ')) st->need_parsing = AVSTREAM_PARSE_FULL; } pos2 = url_ftell(pb); url_fskip(pb, gsize - (pos2 - pos1 + 24)); } else if (!memcmp(&g, &comment_header, sizeof(GUID))) { int len1, len2, len3, len4, len5; len1 = get_le16(pb); len2 = get_le16(pb); len3 = get_le16(pb); len4 = get_le16(pb); len5 = get_le16(pb); get_str16_nolen(pb, len1, s->title , sizeof(s->title)); get_str16_nolen(pb, len2, s->author , sizeof(s->author)); get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright)); get_str16_nolen(pb, len4, s->comment , sizeof(s->comment)); url_fskip(pb, len5); } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) { int stream_count = get_le16(pb); int j; // av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n"); // av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams); for(j = 0; j < stream_count; j++) { int flags, bitrate, stream_id; flags= get_le16(pb); bitrate= get_le32(pb); stream_id= (flags & 0x7f); // av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate); asf->stream_bitrates[stream_id]= bitrate; } } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) { int desc_count, i; desc_count = get_le16(pb); for(i=0;i<desc_count;i++) { int name_len,value_type,value_len; uint64_t value_num = 0; char name[1024]; name_len = get_le16(pb); get_str16_nolen(pb, name_len, name, sizeof(name)); value_type = get_le16(pb); value_len = get_le16(pb); if (value_type <= 1) // unicode or byte { if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album)); else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre)); else if(!strcmp(name,"WM/Year" )) { char year[8]; get_str16_nolen(pb, value_len, year, sizeof(year)); s->year = atoi(year); } else if(!strcmp(name,"WM/Track") && s->track == 0) { char track[8]; get_str16_nolen(pb, value_len, track, sizeof(track)); s->track = strtol(track, NULL, 10) + 1; } else if(!strcmp(name,"WM/TrackNumber")) { char track[8]; get_str16_nolen(pb, value_len, track, sizeof(track)); s->track = strtol(track, NULL, 10); } else url_fskip(pb, value_len); } else if (value_type <= 5) // boolean or DWORD or QWORD or WORD { value_num= get_value(pb, value_type); if (!strcmp(name,"WM/Track" ) && s->track == 0) s->track = value_num + 1; if (!strcmp(name,"WM/TrackNumber")) s->track = value_num; }else url_fskip(pb, value_len); } } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) { int n, stream_num, name_len, value_len, value_type, value_num; n = get_le16(pb); for(i=0;i<n;i++) { char name[1024]; get_le16(pb); //lang_list_index stream_num= get_le16(pb); name_len= get_le16(pb); value_type= get_le16(pb); value_len= get_le32(pb); get_str16_nolen(pb, name_len, name, sizeof(name)); //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name); value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere url_fskip(pb, value_len - 2); if(stream_num<128){ if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num; else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num; } } } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) { int ext_len, payload_ext_ct, stream_ct; uint32_t ext_d, leak_rate, stream_num; int64_t pos_ex_st; pos_ex_st = url_ftell(pb); get_le64(pb); // starttime get_le64(pb); // endtime leak_rate = get_le32(pb); // leak-datarate get_le32(pb); // bucket-datasize get_le32(pb); // init-bucket-fullness get_le32(pb); // alt-leak-datarate get_le32(pb); // alt-bucket-datasize get_le32(pb); // alt-init-bucket-fullness get_le32(pb); // max-object-size get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved) stream_num = get_le16(pb); // stream-num get_le16(pb); // stream-language-id-index get_le64(pb); // avg frametime in 100ns units stream_ct = get_le16(pb); //stream-name-count payload_ext_ct = get_le16(pb); //payload-extension-system-count if (stream_num < 128) bitrate[stream_num] = leak_rate; for (i=0; i<stream_ct; i++){ get_le16(pb); ext_len = get_le16(pb); url_fseek(pb, ext_len, SEEK_CUR); } for (i=0; i<payload_ext_ct; i++){ get_guid(pb, &g); ext_d=get_le16(pb); ext_len=get_le32(pb); url_fseek(pb, ext_len, SEEK_CUR); } // there could be a optional stream properties object to follow // if so the next iteration will pick it up } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) { int v1, v2; get_guid(pb, &g); v1 = get_le32(pb); v2 = get_le16(pb); #if 0 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) { int len, v1, n, num; char str[256], *q; char tag[16]; get_guid(pb, &g); print_guid(&g); n = get_le32(pb); for(i=0;i<n;i++) { num = get_le16(pb); /* stream number */ get_str16(pb, str, sizeof(str)); get_str16(pb, str, sizeof(str)); len = get_le16(pb); q = tag; while (len > 0) { v1 = get_byte(pb); if ((q - tag) < sizeof(tag) - 1) *q++ = v1; len--; } *q = '\0'; } #endif } else if (url_feof(pb)) { goto fail; } else { url_fseek(pb, gsize - 24, SEEK_CUR); } } get_guid(pb, &g); get_le64(pb); get_byte(pb); get_byte(pb); if (url_feof(pb)) goto fail; asf->data_offset = url_ftell(pb); asf->packet_size_left = 0; for(i=0; i<128; i++){ int stream_num= asf->asfid2avid[i]; if(stream_num>=0){ AVCodecContext *codec= s->streams[stream_num]->codec; if (!codec->bit_rate) codec->bit_rate = bitrate[i]; if (dar[i].num > 0 && dar[i].den > 0) av_reduce(&codec->sample_aspect_ratio.num, &codec->sample_aspect_ratio.den, dar[i].num, dar[i].den, INT_MAX); //av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, codec->sample_aspect_ratio.num, codec->sample_aspect_ratio.den); } } return 0; fail: for(i=0;i<s->nb_streams;i++) { AVStream *st = s->streams[i]; if (st) { av_free(st->priv_data); av_free(st->codec->extradata); } av_free(st); } return -1; } #define DO_2BITS(bits, var, defval) \ switch (bits & 3) \ { \ case 3: var = get_le32(pb); rsize += 4; break; \ case 2: var = get_le16(pb); rsize += 2; break; \ case 1: var = get_byte(pb); rsize++; break; \ default: var = defval; break; \ } /** * * @return <0 in case of an error */ static int asf_get_packet(AVFormatContext *s) { ASFContext *asf = s->priv_data; ByteIOContext *pb = s->pb; uint32_t packet_length, padsize; int rsize = 8; int c, d, e, off; off= (url_ftell(s->pb) - s->data_offset) % asf->packet_size + 3; c=d=e=-1; while(off-- > 0){ c=d; d=e; e= get_byte(pb); if(c == 0x82 && !d && !e) break; } if (c != 0x82) { if (!url_feof(pb)) av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb)); } if ((c & 0x8f) == 0x82) { if (d || e) { if (!url_feof(pb)) av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n"); return -1; } c= get_byte(pb); d= get_byte(pb); rsize+=3; }else{ url_fseek(pb, -1, SEEK_CUR); //FIXME } asf->packet_flags = c; asf->packet_property = d; DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size); DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length //the following checks prevent overflows and infinite loops if(packet_length >= (1U<<29)){ av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb)); return -1; } if(padsize >= packet_length){ av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb)); return -1; } asf->packet_timestamp = get_le32(pb); get_le16(pb); /* duration */ // rsize has at least 11 bytes which have to be present if (asf->packet_flags & 0x01) { asf->packet_segsizetype = get_byte(pb); rsize++; asf->packet_segments = asf->packet_segsizetype & 0x3f; } else { asf->packet_segments = 1; asf->packet_segsizetype = 0x80; } asf->packet_size_left = packet_length - padsize - rsize; if (packet_length < asf->hdr.min_pktsize) padsize += asf->hdr.min_pktsize - packet_length; asf->packet_padsize = padsize; #ifdef DEBUG printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left); #endif return 0; } /** * * @return <0 if error */ static int asf_read_frame_header(AVFormatContext *s){ ASFContext *asf = s->priv_data; ByteIOContext *pb = s->pb; int rsize = 1; int num = get_byte(pb); int64_t ts0, ts1; asf->packet_segments--; asf->packet_key_frame = num >> 7; asf->stream_index = asf->asfid2avid[num & 0x7f]; // sequence should be ignored! DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0); DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0); DO_2BITS(asf->packet_property, asf->packet_replic_size, 0); //printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size); if (asf->packet_replic_size >= 8) { asf->packet_obj_size = get_le32(pb); if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){ av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n"); return -1; } asf->packet_frag_timestamp = get_le32(pb); // timestamp if(asf->packet_replic_size >= 8+38+4){ // for(i=0; i<asf->packet_replic_size-8; i++) // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb)); // av_log(s, AV_LOG_DEBUG, "\n"); url_fskip(pb, 10); ts0= get_le64(pb); ts1= get_le64(pb); url_fskip(pb, 12); get_le32(pb); url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4); if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000; else asf->packet_frag_timestamp= AV_NOPTS_VALUE; }else url_fskip(pb, asf->packet_replic_size - 8); rsize += asf->packet_replic_size; // FIXME - check validity } else if (asf->packet_replic_size==1){ // multipacket - frag_offset is beginning timestamp asf->packet_time_start = asf->packet_frag_offset; asf->packet_frag_offset = 0; asf->packet_frag_timestamp = asf->packet_timestamp; asf->packet_time_delta = get_byte(pb); rsize++; }else if(asf->packet_replic_size!=0){ av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size); return -1; } if (asf->packet_flags & 0x01) { DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal if(asf->packet_frag_size > asf->packet_size_left - rsize){ av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n"); return -1; } //printf("Fragsize %d\n", asf->packet_frag_size); } else { asf->packet_frag_size = asf->packet_size_left - rsize; //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize); } if (asf->packet_replic_size == 1) { asf->packet_multi_size = asf->packet_frag_size; if (asf->packet_multi_size > asf->packet_size_left) return -1; } asf->packet_size_left -= rsize; //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize); return 0; } static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) { ASFContext *asf = s->priv_data; ASFStream *asf_st = 0; ByteIOContext *pb = s->pb; //static int pc = 0; for (;;) { if(url_feof(pb)) return AVERROR(EIO); if (asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1) { //asf->packet_size_left <= asf->packet_padsize) { int ret = asf->packet_size_left + asf->packet_padsize; //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb)); assert(ret>=0); /* fail safe */ url_fskip(pb, ret); asf->packet_pos= url_ftell(s->pb); if (asf->data_object_size != (uint64_t)-1 && (asf->packet_pos - asf->data_object_offset >= asf->data_object_size)) return AVERROR(EIO); /* Do not exceed the size of the data object */ ret = asf_get_packet(s); //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++); if (ret < 0) assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1); asf->packet_time_start = 0; continue; } if (asf->packet_time_start == 0) { if(asf_read_frame_header(s) < 0){ asf->packet_segments= 0; continue; } if (asf->stream_index < 0 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY) ) { asf->packet_time_start = 0; /* unhandled packet (should not happen) */ url_fskip(pb, asf->packet_frag_size); asf->packet_size_left -= asf->packet_frag_size; if(asf->stream_index < 0) av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size); continue; } asf->asf_st = s->streams[asf->stream_index]->priv_data; } asf_st = asf->asf_st; if (asf->packet_replic_size == 1) { // frag_offset is here used as the beginning timestamp asf->packet_frag_timestamp = asf->packet_time_start; asf->packet_time_start += asf->packet_time_delta; asf->packet_obj_size = asf->packet_frag_size = get_byte(pb); asf->packet_size_left--; asf->packet_multi_size--; if (asf->packet_multi_size < asf->packet_obj_size) { asf->packet_time_start = 0; url_fskip(pb, asf->packet_multi_size); asf->packet_size_left -= asf->packet_multi_size; continue; } asf->packet_multi_size -= asf->packet_obj_size; //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size); } if( /*asf->packet_frag_size == asf->packet_obj_size*/ asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){ av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n", asf_st->frag_offset, asf->packet_frag_size, asf->packet_obj_size, asf_st->pkt.size); asf->packet_obj_size= asf_st->pkt.size; } if ( asf_st->pkt.size != asf->packet_obj_size || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient? if(asf_st->pkt.data){ av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size); asf_st->frag_offset = 0; av_free_packet(&asf_st->pkt); } /* new packet */ av_new_packet(&asf_st->pkt, asf->packet_obj_size); asf_st->seq = asf->packet_seq; asf_st->pkt.pts = asf->packet_frag_timestamp; asf_st->pkt.stream_index = asf->stream_index; asf_st->pkt.pos = asf_st->packet_pos= asf->packet_pos; //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n", //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY, //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size); if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO) asf->packet_key_frame = 1; if (asf->packet_key_frame) asf_st->pkt.flags |= PKT_FLAG_KEY; } /* read data */ //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n", // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset, // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data); asf->packet_size_left -= asf->packet_frag_size; if (asf->packet_size_left < 0) continue; if( asf->packet_frag_offset >= asf_st->pkt.size || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){ av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n", asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size); continue; } get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset, asf->packet_frag_size); if (s->key && s->keylen == 20) ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset, asf->packet_frag_size); asf_st->frag_offset += asf->packet_frag_size; /* test if whole packet is read */ if (asf_st->frag_offset == asf_st->pkt.size) { //workaround for macroshit radio DVR-MS files if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO && asf_st->pkt.size > 100){ int i; for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++); if(i == asf_st->pkt.size){ av_log(s, AV_LOG_DEBUG, "discarding ms fart\n"); asf_st->frag_offset = 0; av_free_packet(&asf_st->pkt); continue; } } /* return packet */ if (asf_st->ds_span > 1) { if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){ av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span); }else{ /* packet descrambling */ uint8_t *newdata = av_malloc(asf_st->pkt.size); if (newdata) { int offset = 0; while (offset < asf_st->pkt.size) { int off = offset / asf_st->ds_chunk_size; int row = off / asf_st->ds_span; int col = off % asf_st->ds_span; int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size; //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx); assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size); assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size); memcpy(newdata + offset, asf_st->pkt.data + idx * asf_st->ds_chunk_size, asf_st->ds_chunk_size); offset += asf_st->ds_chunk_size; } av_free(asf_st->pkt.data); asf_st->pkt.data = newdata; } } } asf_st->frag_offset = 0; *pkt= asf_st->pkt; //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size); asf_st->pkt.size = 0; asf_st->pkt.data = 0; break; // packet completed } } return 0; } // Added to support seeking after packets have been read // If information is not reset, read_packet fails due to // leftover information from previous reads static void asf_reset_header(AVFormatContext *s) { ASFContext *asf = s->priv_data; ASFStream *asf_st; int i; asf->packet_nb_frames = 0; asf->packet_size_left = 0; asf->packet_segments = 0; asf->packet_flags = 0; asf->packet_property = 0; asf->packet_timestamp = 0; asf->packet_segsizetype = 0; asf->packet_segments = 0; asf->packet_seq = 0; asf->packet_replic_size = 0; asf->packet_key_frame = 0; asf->packet_padsize = 0; asf->packet_frag_offset = 0; asf->packet_frag_size = 0; asf->packet_frag_timestamp = 0; asf->packet_multi_size = 0; asf->packet_obj_size = 0; asf->packet_time_delta = 0; asf->packet_time_start = 0; for(i=0; i<s->nb_streams; i++){ asf_st= s->streams[i]->priv_data; av_free_packet(&asf_st->pkt); asf_st->frag_offset=0; asf_st->seq=0; } asf->asf_st= NULL; } static int asf_read_close(AVFormatContext *s) { int i; asf_reset_header(s); for(i=0;i<s->nb_streams;i++) { AVStream *st = s->streams[i]; av_free(st->priv_data); av_free(st->codec->palctrl); } return 0; } static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit) { ASFContext *asf = s->priv_data; AVPacket pkt1, *pkt = &pkt1; ASFStream *asf_st; int64_t pts; int64_t pos= *ppos; int i; int64_t start_pos[s->nb_streams]; for(i=0; i<s->nb_streams; i++){ start_pos[i]= pos; } pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset; *ppos= pos; url_fseek(s->pb, pos, SEEK_SET); //printf("asf_read_pts\n"); asf_reset_header(s); for(;;){ if (av_read_frame(s, pkt) < 0){ av_log(s, AV_LOG_INFO, "asf_read_pts failed\n"); return AV_NOPTS_VALUE; } pts= pkt->pts; av_free_packet(pkt); if(pkt->flags&PKT_FLAG_KEY){ i= pkt->stream_index; asf_st= s->streams[i]->priv_data; // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0); pos= asf_st->packet_pos; av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME); start_pos[i]= asf_st->packet_pos + 1; if(pkt->stream_index == stream_index) break; } } *ppos= pos; //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts); return pts; } static void asf_build_simple_index(AVFormatContext *s, int stream_index) { GUID g; ASFContext *asf = s->priv_data; int64_t gsize, itime; int64_t pos, current_pos, index_pts; int i; int pct,ict; current_pos = url_ftell(s->pb); url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET); get_guid(s->pb, &g); if (!memcmp(&g, &index_guid, sizeof(GUID))) { gsize = get_le64(s->pb); get_guid(s->pb, &g); itime=get_le64(s->pb); pct=get_le32(s->pb); ict=get_le32(s->pb); av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict); for (i=0;i<ict;i++){ int pktnum=get_le32(s->pb); int pktct =get_le16(s->pb); av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct); pos=s->data_offset + asf->packet_size*(int64_t)pktnum; index_pts=av_rescale(itime, i, 10000); av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME); } asf->index_read= 1; } url_fseek(s->pb, current_pos, SEEK_SET); } static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags) { ASFContext *asf = s->priv_data; AVStream *st = s->streams[stream_index]; int64_t pos; int index; if (asf->packet_size <= 0) return -1; /* Try using the protocol's read_seek if available */ if(s->pb) { int ret = av_url_read_fseek(s->pb, stream_index, pts, flags); if(ret >= 0) asf_reset_header(s); if (ret != AVERROR(ENOSYS)) return ret; } if (!asf->index_read) asf_build_simple_index(s, stream_index); if(!(asf->index_read && st->index_entries)){ if(av_seek_frame_binary(s, stream_index, pts, flags)<0) return -1; }else{ index= av_index_search_timestamp(st, pts, flags); if(index<0) return -1; /* find the position */ pos = st->index_entries[index].pos; pts = st->index_entries[index].timestamp; // various attempts to find key frame have failed so far // asf_reset_header(s); // url_fseek(s->pb, pos, SEEK_SET); // key_pos = pos; // for(i=0;i<16;i++){ // pos = url_ftell(s->pb); // if (av_read_frame(s, &pkt) < 0){ // av_log(s, AV_LOG_INFO, "seek failed\n"); // return -1; // } // asf_st = s->streams[stream_index]->priv_data; // pos += st->parser->frame_offset; // // if (pkt.size > b) { // b = pkt.size; // key_pos = pos; // } // // av_free_packet(&pkt); // } /* do the seek */ av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos); url_fseek(s->pb, pos, SEEK_SET); } asf_reset_header(s); return 0; } AVInputFormat asf_demuxer = { "asf", "asf format", sizeof(ASFContext), asf_probe, asf_read_header, asf_read_packet, asf_read_close, asf_read_seek, asf_read_pts, };