ffmpeg / libavformat / asfdec.c @ 133055c5
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/*
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* ASF compatible demuxer
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* Copyright (c) 2000, 2001 Fabrice Bellard
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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//#define DEBUG
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#include "libavutil/common.h" |
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#include "libavutil/avstring.h" |
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#include "libavcodec/mpegaudio.h" |
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#include "avformat.h" |
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#include "riff.h" |
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#include "asf.h" |
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#include "asfcrypt.h" |
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#include "avlanguage.h" |
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void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
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typedef struct { |
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int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID |
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ASFStream streams[128]; ///< it's max number and it's not that big |
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uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming) |
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AVRational dar[128];
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char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US) |
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/* non streamed additonnal info */
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/* packet filling */
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int packet_size_left;
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/* only for reading */
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uint64_t data_offset; ///< beginning of the first data packet
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uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
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uint64_t data_object_size; ///< size of the data object
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int index_read;
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ASFMainHeader hdr; |
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int packet_flags;
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int packet_property;
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int packet_timestamp;
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int packet_segsizetype;
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int packet_segments;
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int packet_seq;
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int packet_replic_size;
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int packet_key_frame;
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int packet_padsize;
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unsigned int packet_frag_offset; |
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unsigned int packet_frag_size; |
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int64_t packet_frag_timestamp; |
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int packet_multi_size;
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int packet_obj_size;
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int packet_time_delta;
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int packet_time_start;
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int64_t packet_pos; |
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int stream_index;
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ASFStream* asf_st; ///< currently decoded stream
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} ASFContext; |
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#undef NDEBUG
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#include <assert.h> |
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#define ASF_MAX_STREAMS 127 |
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#define FRAME_HEADER_SIZE 17 |
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// Fix Me! FRAME_HEADER_SIZE may be different.
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static const ff_asf_guid index_guid = { |
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0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb |
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}; |
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static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */ |
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0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2 |
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}; |
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/**********************************/
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/* decoding */
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#ifdef DEBUG
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#define PRINT_IF_GUID(g,cmp) \
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if (!ff_guidcmp(g, &cmp)) \
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av_dlog(NULL, "(GUID: %s) ", #cmp) |
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static void print_guid(const ff_asf_guid *g) |
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{ |
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int i;
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PRINT_IF_GUID(g, ff_asf_header); |
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else PRINT_IF_GUID(g, ff_asf_file_header);
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else PRINT_IF_GUID(g, ff_asf_stream_header);
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else PRINT_IF_GUID(g, ff_asf_audio_stream);
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else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
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else PRINT_IF_GUID(g, ff_asf_video_stream);
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else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
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else PRINT_IF_GUID(g, ff_asf_command_stream);
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else PRINT_IF_GUID(g, ff_asf_comment_header);
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else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
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else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
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else PRINT_IF_GUID(g, ff_asf_data_header);
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else PRINT_IF_GUID(g, index_guid);
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else PRINT_IF_GUID(g, ff_asf_head1_guid);
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else PRINT_IF_GUID(g, ff_asf_head2_guid);
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else PRINT_IF_GUID(g, ff_asf_my_guid);
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else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
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else PRINT_IF_GUID(g, ff_asf_extended_content_header);
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else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
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else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
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else PRINT_IF_GUID(g, ff_asf_metadata_header);
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else PRINT_IF_GUID(g, ff_asf_marker_header);
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else PRINT_IF_GUID(g, stream_bitrate_guid);
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else PRINT_IF_GUID(g, ff_asf_language_guid);
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else
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av_dlog(NULL, "(GUID: unknown) "); |
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for(i=0;i<16;i++) |
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av_dlog(NULL, " 0x%02x,", (*g)[i]); |
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av_dlog(NULL, "}\n"); |
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} |
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#undef PRINT_IF_GUID
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#else
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#define print_guid(g)
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#endif
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void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
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{ |
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assert(sizeof(*g) == 16); |
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avio_read(s, *g, sizeof(*g));
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} |
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static int asf_probe(AVProbeData *pd) |
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{ |
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/* check file header */
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if (!ff_guidcmp(pd->buf, &ff_asf_header))
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return AVPROBE_SCORE_MAX;
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else
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return 0; |
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} |
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static int get_value(AVIOContext *pb, int type){ |
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switch(type){
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case 2: return avio_rl32(pb); |
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case 3: return avio_rl32(pb); |
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case 4: return avio_rl64(pb); |
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case 5: return avio_rl16(pb); |
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default:return INT_MIN; |
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} |
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} |
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static void get_tag(AVFormatContext *s, const char *key, int type, int len) |
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{ |
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char *value;
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int64_t off = avio_tell(s->pb); |
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if ((unsigned)len >= (UINT_MAX - 1)/2) |
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return;
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value = av_malloc(2*len+1); |
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if (!value)
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goto finish;
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if (type == 0) { // UTF16-LE |
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avio_get_str16le(s->pb, len, value, 2*len + 1); |
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} else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD |
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uint64_t num = get_value(s->pb, type); |
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snprintf(value, len, "%"PRIu64, num);
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} else {
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av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
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goto finish;
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} |
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av_metadata_set2(&s->metadata, key, value, 0);
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finish:
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av_freep(&value); |
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avio_seek(s->pb, off + len, SEEK_SET); |
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} |
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static int asf_read_file_properties(AVFormatContext *s, int64_t size) |
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{ |
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ASFContext *asf = s->priv_data; |
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AVIOContext *pb = s->pb; |
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ff_get_guid(pb, &asf->hdr.guid); |
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asf->hdr.file_size = avio_rl64(pb); |
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asf->hdr.create_time = avio_rl64(pb); |
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avio_rl64(pb); /* number of packets */
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asf->hdr.play_time = avio_rl64(pb); |
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asf->hdr.send_time = avio_rl64(pb); |
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asf->hdr.preroll = avio_rl32(pb); |
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asf->hdr.ignore = avio_rl32(pb); |
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asf->hdr.flags = avio_rl32(pb); |
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asf->hdr.min_pktsize = avio_rl32(pb); |
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asf->hdr.max_pktsize = avio_rl32(pb); |
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asf->hdr.max_bitrate = avio_rl32(pb); |
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s->packet_size = asf->hdr.max_pktsize; |
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return 0; |
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} |
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static int asf_read_stream_properties(AVFormatContext *s, int64_t size) |
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{ |
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ASFContext *asf = s->priv_data; |
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AVIOContext *pb = s->pb; |
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AVStream *st; |
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ASFStream *asf_st; |
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ff_asf_guid g; |
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enum AVMediaType type;
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int type_specific_size, sizeX;
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uint64_t total_size; |
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unsigned int tag1; |
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int64_t pos1, pos2, start_time; |
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int test_for_ext_stream_audio, is_dvr_ms_audio=0; |
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if (s->nb_streams == ASF_MAX_STREAMS) {
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av_log(s, AV_LOG_ERROR, "too many streams\n");
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return AVERROR(EINVAL);
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} |
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pos1 = avio_tell(pb); |
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st = av_new_stream(s, 0);
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if (!st)
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return AVERROR(ENOMEM);
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av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */ |
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asf_st = av_mallocz(sizeof(ASFStream));
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if (!asf_st)
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return AVERROR(ENOMEM);
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st->priv_data = asf_st; |
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start_time = asf->hdr.preroll; |
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asf_st->stream_language_index = 128; // invalid stream index means no language info |
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if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming... |
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st->duration = asf->hdr.play_time / |
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(10000000 / 1000) - start_time; |
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} |
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ff_get_guid(pb, &g); |
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test_for_ext_stream_audio = 0;
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if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
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type = AVMEDIA_TYPE_AUDIO; |
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} else if (!ff_guidcmp(&g, &ff_asf_video_stream)) { |
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type = AVMEDIA_TYPE_VIDEO; |
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} else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) { |
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type = AVMEDIA_TYPE_VIDEO; |
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st->codec->codec_id = CODEC_ID_MJPEG; |
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} else if (!ff_guidcmp(&g, &ff_asf_command_stream)) { |
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type = AVMEDIA_TYPE_DATA; |
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} else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) { |
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test_for_ext_stream_audio = 1;
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type = AVMEDIA_TYPE_UNKNOWN; |
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} else {
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return -1; |
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} |
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ff_get_guid(pb, &g); |
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total_size = avio_rl64(pb); |
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type_specific_size = avio_rl32(pb); |
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avio_rl32(pb); |
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st->id = avio_rl16(pb) & 0x7f; /* stream id */ |
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// mapping of asf ID to AV stream ID;
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asf->asfid2avid[st->id] = s->nb_streams - 1;
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avio_rl32(pb); |
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if (test_for_ext_stream_audio) {
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ff_get_guid(pb, &g); |
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if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
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type = AVMEDIA_TYPE_AUDIO; |
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is_dvr_ms_audio=1;
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ff_get_guid(pb, &g); |
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avio_rl32(pb); |
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avio_rl32(pb); |
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avio_rl32(pb); |
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ff_get_guid(pb, &g); |
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avio_rl32(pb); |
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} |
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} |
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st->codec->codec_type = type; |
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if (type == AVMEDIA_TYPE_AUDIO) {
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ff_get_wav_header(pb, st->codec, type_specific_size); |
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if (is_dvr_ms_audio) {
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// codec_id and codec_tag are unreliable in dvr_ms
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// files. Set them later by probing stream.
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st->codec->codec_id = CODEC_ID_PROBE; |
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st->codec->codec_tag = 0;
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} |
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if (st->codec->codec_id == CODEC_ID_AAC) {
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st->need_parsing = AVSTREAM_PARSE_NONE; |
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} else {
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st->need_parsing = AVSTREAM_PARSE_FULL; |
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} |
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/* We have to init the frame size at some point .... */
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pos2 = avio_tell(pb); |
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if (size >= (pos2 + 8 - pos1 + 24)) { |
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asf_st->ds_span = avio_r8(pb); |
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asf_st->ds_packet_size = avio_rl16(pb); |
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asf_st->ds_chunk_size = avio_rl16(pb); |
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avio_rl16(pb); //ds_data_size
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avio_r8(pb); //ds_silence_data
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} |
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//printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
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// asf_st->ds_packet_size, asf_st->ds_chunk_size,
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// asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
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if (asf_st->ds_span > 1) { |
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if (!asf_st->ds_chunk_size
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|| (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
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|| asf_st->ds_packet_size % asf_st->ds_chunk_size) |
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asf_st->ds_span = 0; // disable descrambling |
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} |
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switch (st->codec->codec_id) {
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case CODEC_ID_MP3:
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st->codec->frame_size = MPA_FRAME_SIZE; |
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break;
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case CODEC_ID_PCM_S16LE:
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case CODEC_ID_PCM_S16BE:
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case CODEC_ID_PCM_U16LE:
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case CODEC_ID_PCM_U16BE:
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case CODEC_ID_PCM_S8:
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case CODEC_ID_PCM_U8:
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case CODEC_ID_PCM_ALAW:
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case CODEC_ID_PCM_MULAW:
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st->codec->frame_size = 1;
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break;
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default:
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/* This is probably wrong, but it prevents a crash later */
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st->codec->frame_size = 1;
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break;
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} |
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} else if (type == AVMEDIA_TYPE_VIDEO && |
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size - (avio_tell(pb) - pos1 + 24) >= 51) { |
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avio_rl32(pb); |
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avio_rl32(pb); |
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avio_r8(pb); |
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avio_rl16(pb); /* size */
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sizeX= avio_rl32(pb); /* size */
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st->codec->width = avio_rl32(pb); |
347 |
st->codec->height = avio_rl32(pb); |
348 |
/* not available for asf */
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avio_rl16(pb); /* panes */
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st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
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tag1 = avio_rl32(pb); |
352 |
avio_skip(pb, 20);
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// av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
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if (sizeX > 40) { |
355 |
st->codec->extradata_size = sizeX - 40;
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st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
357 |
avio_read(pb, st->codec->extradata, st->codec->extradata_size); |
358 |
} |
359 |
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/* Extract palette from extradata if bpp <= 8 */
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/* This code assumes that extradata contains only palette */
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/* This is true for all paletted codecs implemented in ffmpeg */
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if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) { |
364 |
int av_unused i;
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st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
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#if HAVE_BIGENDIAN
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for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++) |
368 |
st->codec->palctrl->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]); |
369 |
#else
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memcpy(st->codec->palctrl->palette, st->codec->extradata, |
371 |
FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)); |
372 |
#endif
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st->codec->palctrl->palette_changed = 1;
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} |
375 |
|
376 |
st->codec->codec_tag = tag1; |
377 |
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1); |
378 |
if(tag1 == MKTAG('D', 'V', 'R', ' ')){ |
379 |
st->need_parsing = AVSTREAM_PARSE_FULL; |
380 |
// issue658 containse wrong w/h and MS even puts a fake seq header with wrong w/h in extradata while a correct one is in te stream. maximum lameness
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st->codec->width = |
382 |
st->codec->height = 0;
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av_freep(&st->codec->extradata); |
384 |
st->codec->extradata_size=0;
|
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} |
386 |
if(st->codec->codec_id == CODEC_ID_H264)
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st->need_parsing = AVSTREAM_PARSE_FULL_ONCE; |
388 |
} |
389 |
pos2 = avio_tell(pb); |
390 |
avio_skip(pb, size - (pos2 - pos1 + 24));
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|
392 |
return 0; |
393 |
} |
394 |
|
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static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size) |
396 |
{ |
397 |
ASFContext *asf = s->priv_data; |
398 |
AVIOContext *pb = s->pb; |
399 |
ff_asf_guid g; |
400 |
int ext_len, payload_ext_ct, stream_ct, i;
|
401 |
uint32_t ext_d, leak_rate, stream_num; |
402 |
unsigned int stream_languageid_index; |
403 |
|
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avio_rl64(pb); // starttime
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405 |
avio_rl64(pb); // endtime
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406 |
leak_rate = avio_rl32(pb); // leak-datarate
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407 |
avio_rl32(pb); // bucket-datasize
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408 |
avio_rl32(pb); // init-bucket-fullness
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409 |
avio_rl32(pb); // alt-leak-datarate
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avio_rl32(pb); // alt-bucket-datasize
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411 |
avio_rl32(pb); // alt-init-bucket-fullness
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avio_rl32(pb); // max-object-size
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413 |
avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
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414 |
stream_num = avio_rl16(pb); // stream-num
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415 |
|
416 |
stream_languageid_index = avio_rl16(pb); // stream-language-id-index
|
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if (stream_num < 128) |
418 |
asf->streams[stream_num].stream_language_index = stream_languageid_index; |
419 |
|
420 |
avio_rl64(pb); // avg frametime in 100ns units
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stream_ct = avio_rl16(pb); //stream-name-count
|
422 |
payload_ext_ct = avio_rl16(pb); //payload-extension-system-count
|
423 |
|
424 |
if (stream_num < 128) |
425 |
asf->stream_bitrates[stream_num] = leak_rate; |
426 |
|
427 |
for (i=0; i<stream_ct; i++){ |
428 |
avio_rl16(pb); |
429 |
ext_len = avio_rl16(pb); |
430 |
avio_skip(pb, ext_len); |
431 |
} |
432 |
|
433 |
for (i=0; i<payload_ext_ct; i++){ |
434 |
ff_get_guid(pb, &g); |
435 |
ext_d=avio_rl16(pb); |
436 |
ext_len=avio_rl32(pb); |
437 |
avio_skip(pb, ext_len); |
438 |
} |
439 |
|
440 |
return 0; |
441 |
} |
442 |
|
443 |
static int asf_read_content_desc(AVFormatContext *s, int64_t size) |
444 |
{ |
445 |
AVIOContext *pb = s->pb; |
446 |
int len1, len2, len3, len4, len5;
|
447 |
|
448 |
len1 = avio_rl16(pb); |
449 |
len2 = avio_rl16(pb); |
450 |
len3 = avio_rl16(pb); |
451 |
len4 = avio_rl16(pb); |
452 |
len5 = avio_rl16(pb); |
453 |
get_tag(s, "title" , 0, len1); |
454 |
get_tag(s, "author" , 0, len2); |
455 |
get_tag(s, "copyright", 0, len3); |
456 |
get_tag(s, "comment" , 0, len4); |
457 |
avio_skip(pb, len5); |
458 |
|
459 |
return 0; |
460 |
} |
461 |
|
462 |
static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size) |
463 |
{ |
464 |
AVIOContext *pb = s->pb; |
465 |
ASFContext *asf = s->priv_data; |
466 |
int desc_count, i, ret;
|
467 |
|
468 |
desc_count = avio_rl16(pb); |
469 |
for(i=0;i<desc_count;i++) { |
470 |
int name_len,value_type,value_len;
|
471 |
char name[1024]; |
472 |
|
473 |
name_len = avio_rl16(pb); |
474 |
if (name_len%2) // must be even, broken lavf versions wrote len-1 |
475 |
name_len += 1;
|
476 |
if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) |
477 |
avio_skip(pb, name_len - ret); |
478 |
value_type = avio_rl16(pb); |
479 |
value_len = avio_rl16(pb); |
480 |
if (!value_type && value_len%2) |
481 |
value_len += 1;
|
482 |
/**
|
483 |
* My sample has that stream set to 0 maybe that mean the container.
|
484 |
* Asf stream count start at 1. I am using 0 to the container value since it's unused
|
485 |
*/
|
486 |
if (!strcmp(name, "AspectRatioX")){ |
487 |
asf->dar[0].num= get_value(s->pb, value_type);
|
488 |
} else if(!strcmp(name, "AspectRatioY")){ |
489 |
asf->dar[0].den= get_value(s->pb, value_type);
|
490 |
} else
|
491 |
get_tag(s, name, value_type, value_len); |
492 |
} |
493 |
|
494 |
return 0; |
495 |
} |
496 |
|
497 |
static int asf_read_language_list(AVFormatContext *s, int64_t size) |
498 |
{ |
499 |
AVIOContext *pb = s->pb; |
500 |
ASFContext *asf = s->priv_data; |
501 |
int j, ret;
|
502 |
int stream_count = avio_rl16(pb);
|
503 |
for(j = 0; j < stream_count; j++) { |
504 |
char lang[6]; |
505 |
unsigned int lang_len = avio_r8(pb); |
506 |
if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len) |
507 |
avio_skip(pb, lang_len - ret); |
508 |
if (j < 128) |
509 |
av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
|
510 |
} |
511 |
|
512 |
return 0; |
513 |
} |
514 |
|
515 |
static int asf_read_metadata(AVFormatContext *s, int64_t size) |
516 |
{ |
517 |
AVIOContext *pb = s->pb; |
518 |
ASFContext *asf = s->priv_data; |
519 |
int n, stream_num, name_len, value_len, value_type, value_num;
|
520 |
int ret, i;
|
521 |
n = avio_rl16(pb); |
522 |
|
523 |
for(i=0;i<n;i++) { |
524 |
char name[1024]; |
525 |
|
526 |
avio_rl16(pb); //lang_list_index
|
527 |
stream_num= avio_rl16(pb); |
528 |
name_len= avio_rl16(pb); |
529 |
value_type= avio_rl16(pb); |
530 |
value_len= avio_rl32(pb); |
531 |
|
532 |
if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len) |
533 |
avio_skip(pb, name_len - ret); |
534 |
//av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
|
535 |
value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
|
536 |
avio_skip(pb, value_len - 2);
|
537 |
|
538 |
if(stream_num<128){ |
539 |
if (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num; |
540 |
else if(!strcmp(name, "AspectRatioY")) asf->dar[stream_num].den= value_num; |
541 |
} |
542 |
} |
543 |
|
544 |
return 0; |
545 |
} |
546 |
|
547 |
static int asf_read_marker(AVFormatContext *s, int64_t size) |
548 |
{ |
549 |
AVIOContext *pb = s->pb; |
550 |
int i, count, name_len, ret;
|
551 |
char name[1024]; |
552 |
|
553 |
avio_rl64(pb); // reserved 16 bytes
|
554 |
avio_rl64(pb); // ...
|
555 |
count = avio_rl32(pb); // markers count
|
556 |
avio_rl16(pb); // reserved 2 bytes
|
557 |
name_len = avio_rl16(pb); // name length
|
558 |
for(i=0;i<name_len;i++){ |
559 |
avio_r8(pb); // skip the name
|
560 |
} |
561 |
|
562 |
for(i=0;i<count;i++){ |
563 |
int64_t pres_time; |
564 |
int name_len;
|
565 |
|
566 |
avio_rl64(pb); // offset, 8 bytes
|
567 |
pres_time = avio_rl64(pb); // presentation time
|
568 |
avio_rl16(pb); // entry length
|
569 |
avio_rl32(pb); // send time
|
570 |
avio_rl32(pb); // flags
|
571 |
name_len = avio_rl32(pb); // name length
|
572 |
if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len) |
573 |
avio_skip(pb, name_len - ret); |
574 |
ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name ); |
575 |
} |
576 |
|
577 |
return 0; |
578 |
} |
579 |
|
580 |
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap) |
581 |
{ |
582 |
ASFContext *asf = s->priv_data; |
583 |
ff_asf_guid g; |
584 |
AVIOContext *pb = s->pb; |
585 |
int i;
|
586 |
int64_t gsize; |
587 |
|
588 |
ff_get_guid(pb, &g); |
589 |
if (ff_guidcmp(&g, &ff_asf_header))
|
590 |
return -1; |
591 |
avio_rl64(pb); |
592 |
avio_rl32(pb); |
593 |
avio_r8(pb); |
594 |
avio_r8(pb); |
595 |
memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid)); |
596 |
for(;;) {
|
597 |
uint64_t gpos= avio_tell(pb); |
598 |
ff_get_guid(pb, &g); |
599 |
gsize = avio_rl64(pb); |
600 |
av_dlog(s, "%08"PRIx64": ", gpos); |
601 |
print_guid(&g); |
602 |
av_dlog(s, " size=0x%"PRIx64"\n", gsize); |
603 |
if (!ff_guidcmp(&g, &ff_asf_data_header)) {
|
604 |
asf->data_object_offset = avio_tell(pb); |
605 |
// if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
|
606 |
if (!(asf->hdr.flags & 0x01) && gsize >= 100) { |
607 |
asf->data_object_size = gsize - 24;
|
608 |
} else {
|
609 |
asf->data_object_size = (uint64_t)-1;
|
610 |
} |
611 |
break;
|
612 |
} |
613 |
if (gsize < 24) |
614 |
return -1; |
615 |
if (!ff_guidcmp(&g, &ff_asf_file_header)) {
|
616 |
asf_read_file_properties(s, gsize); |
617 |
} else if (!ff_guidcmp(&g, &ff_asf_stream_header)) { |
618 |
asf_read_stream_properties(s, gsize); |
619 |
} else if (!ff_guidcmp(&g, &ff_asf_comment_header)) { |
620 |
asf_read_content_desc(s, gsize); |
621 |
} else if (!ff_guidcmp(&g, &ff_asf_language_guid)) { |
622 |
asf_read_language_list(s, gsize); |
623 |
} else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) { |
624 |
asf_read_ext_content_desc(s, gsize); |
625 |
} else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) { |
626 |
asf_read_metadata(s, gsize); |
627 |
} else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) { |
628 |
asf_read_ext_stream_properties(s, gsize); |
629 |
|
630 |
// there could be a optional stream properties object to follow
|
631 |
// if so the next iteration will pick it up
|
632 |
continue;
|
633 |
} else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) { |
634 |
int v1, v2;
|
635 |
ff_get_guid(pb, &g); |
636 |
v1 = avio_rl32(pb); |
637 |
v2 = avio_rl16(pb); |
638 |
continue;
|
639 |
} else if (!ff_guidcmp(&g, &ff_asf_marker_header)) { |
640 |
asf_read_marker(s, gsize); |
641 |
} else if (url_feof(pb)) { |
642 |
return -1; |
643 |
} else {
|
644 |
if (!s->keylen) {
|
645 |
if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
|
646 |
av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
|
647 |
} else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) { |
648 |
av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
|
649 |
} else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) { |
650 |
av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
|
651 |
} |
652 |
} |
653 |
} |
654 |
if(avio_tell(pb) != gpos + gsize)
|
655 |
av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", avio_tell(pb)-gpos, gsize); |
656 |
avio_seek(pb, gpos + gsize, SEEK_SET); |
657 |
} |
658 |
ff_get_guid(pb, &g); |
659 |
avio_rl64(pb); |
660 |
avio_r8(pb); |
661 |
avio_r8(pb); |
662 |
if (url_feof(pb))
|
663 |
return -1; |
664 |
asf->data_offset = avio_tell(pb); |
665 |
asf->packet_size_left = 0;
|
666 |
|
667 |
|
668 |
for(i=0; i<128; i++){ |
669 |
int stream_num= asf->asfid2avid[i];
|
670 |
if(stream_num>=0){ |
671 |
AVStream *st = s->streams[stream_num]; |
672 |
if (!st->codec->bit_rate)
|
673 |
st->codec->bit_rate = asf->stream_bitrates[i]; |
674 |
if (asf->dar[i].num > 0 && asf->dar[i].den > 0){ |
675 |
av_reduce(&st->sample_aspect_ratio.num, |
676 |
&st->sample_aspect_ratio.den, |
677 |
asf->dar[i].num, asf->dar[i].den, INT_MAX); |
678 |
} else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set. |
679 |
av_reduce(&st->sample_aspect_ratio.num, |
680 |
&st->sample_aspect_ratio.den, |
681 |
asf->dar[0].num, asf->dar[0].den, INT_MAX); |
682 |
|
683 |
//av_log(s, AV_LOG_INFO, "i=%d, st->codec->codec_type:%d, dar %d:%d sar=%d:%d\n", i, st->codec->codec_type, dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
|
684 |
|
685 |
// copy and convert language codes to the frontend
|
686 |
if (asf->streams[i].stream_language_index < 128) { |
687 |
const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index]; |
688 |
if (rfc1766 && strlen(rfc1766) > 1) { |
689 |
const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any |
690 |
const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL); |
691 |
if (iso6392)
|
692 |
av_metadata_set2(&st->metadata, "language", iso6392, 0); |
693 |
} |
694 |
} |
695 |
} |
696 |
} |
697 |
|
698 |
ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
|
699 |
|
700 |
return 0; |
701 |
} |
702 |
|
703 |
#define DO_2BITS(bits, var, defval) \
|
704 |
switch (bits & 3) \ |
705 |
{ \ |
706 |
case 3: var = avio_rl32(pb); rsize += 4; break; \ |
707 |
case 2: var = avio_rl16(pb); rsize += 2; break; \ |
708 |
case 1: var = avio_r8(pb); rsize++; break; \ |
709 |
default: var = defval; break; \ |
710 |
} |
711 |
|
712 |
/**
|
713 |
* Load a single ASF packet into the demuxer.
|
714 |
* @param s demux context
|
715 |
* @param pb context to read data from
|
716 |
* @return 0 on success, <0 on error
|
717 |
*/
|
718 |
static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb) |
719 |
{ |
720 |
ASFContext *asf = s->priv_data; |
721 |
uint32_t packet_length, padsize; |
722 |
int rsize = 8; |
723 |
int c, d, e, off;
|
724 |
|
725 |
// if we do not know packet size, allow skipping up to 32 kB
|
726 |
off= 32768;
|
727 |
if (s->packet_size > 0) |
728 |
off= (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
|
729 |
|
730 |
c=d=e=-1;
|
731 |
while(off-- > 0){ |
732 |
c=d; d=e; |
733 |
e= avio_r8(pb); |
734 |
if(c == 0x82 && !d && !e) |
735 |
break;
|
736 |
} |
737 |
|
738 |
if (c != 0x82) { |
739 |
/**
|
740 |
* This code allows handling of -EAGAIN at packet boundaries (i.e.
|
741 |
* if the packet sync code above triggers -EAGAIN). This does not
|
742 |
* imply complete -EAGAIN handling support at random positions in
|
743 |
* the stream.
|
744 |
*/
|
745 |
if (pb->error == AVERROR(EAGAIN))
|
746 |
return AVERROR(EAGAIN);
|
747 |
if (!url_feof(pb))
|
748 |
av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb)); |
749 |
} |
750 |
if ((c & 0x8f) == 0x82) { |
751 |
if (d || e) {
|
752 |
if (!url_feof(pb))
|
753 |
av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
|
754 |
return -1; |
755 |
} |
756 |
c= avio_r8(pb); |
757 |
d= avio_r8(pb); |
758 |
rsize+=3;
|
759 |
}else{
|
760 |
avio_seek(pb, -1, SEEK_CUR); //FIXME |
761 |
} |
762 |
|
763 |
asf->packet_flags = c; |
764 |
asf->packet_property = d; |
765 |
|
766 |
DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
|
767 |
DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored |
768 |
DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length |
769 |
|
770 |
//the following checks prevent overflows and infinite loops
|
771 |
if(!packet_length || packet_length >= (1U<<29)){ |
772 |
av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, avio_tell(pb)); |
773 |
return -1; |
774 |
} |
775 |
if(padsize >= packet_length){
|
776 |
av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb)); |
777 |
return -1; |
778 |
} |
779 |
|
780 |
asf->packet_timestamp = avio_rl32(pb); |
781 |
avio_rl16(pb); /* duration */
|
782 |
// rsize has at least 11 bytes which have to be present
|
783 |
|
784 |
if (asf->packet_flags & 0x01) { |
785 |
asf->packet_segsizetype = avio_r8(pb); rsize++; |
786 |
asf->packet_segments = asf->packet_segsizetype & 0x3f;
|
787 |
} else {
|
788 |
asf->packet_segments = 1;
|
789 |
asf->packet_segsizetype = 0x80;
|
790 |
} |
791 |
asf->packet_size_left = packet_length - padsize - rsize; |
792 |
if (packet_length < asf->hdr.min_pktsize)
|
793 |
padsize += asf->hdr.min_pktsize - packet_length; |
794 |
asf->packet_padsize = padsize; |
795 |
av_dlog(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
|
796 |
return 0; |
797 |
} |
798 |
|
799 |
/**
|
800 |
*
|
801 |
* @return <0 if error
|
802 |
*/
|
803 |
static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){ |
804 |
ASFContext *asf = s->priv_data; |
805 |
int rsize = 1; |
806 |
int num = avio_r8(pb);
|
807 |
int64_t ts0, ts1; |
808 |
|
809 |
asf->packet_segments--; |
810 |
asf->packet_key_frame = num >> 7;
|
811 |
asf->stream_index = asf->asfid2avid[num & 0x7f];
|
812 |
// sequence should be ignored!
|
813 |
DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0); |
814 |
DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0); |
815 |
DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
|
816 |
//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);
|
817 |
if (asf->packet_replic_size >= 8) { |
818 |
asf->packet_obj_size = avio_rl32(pb); |
819 |
if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){ |
820 |
av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
|
821 |
return -1; |
822 |
} |
823 |
asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
|
824 |
if(asf->packet_replic_size >= 8+38+4){ |
825 |
// for(i=0; i<asf->packet_replic_size-8; i++)
|
826 |
// av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb));
|
827 |
// av_log(s, AV_LOG_DEBUG, "\n");
|
828 |
avio_skip(pb, 10);
|
829 |
ts0= avio_rl64(pb); |
830 |
ts1= avio_rl64(pb); |
831 |
avio_skip(pb, 12);
|
832 |
avio_rl32(pb); |
833 |
avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4); |
834 |
if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000; |
835 |
else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
|
836 |
}else
|
837 |
avio_skip(pb, asf->packet_replic_size - 8);
|
838 |
rsize += asf->packet_replic_size; // FIXME - check validity
|
839 |
} else if (asf->packet_replic_size==1){ |
840 |
// multipacket - frag_offset is beginning timestamp
|
841 |
asf->packet_time_start = asf->packet_frag_offset; |
842 |
asf->packet_frag_offset = 0;
|
843 |
asf->packet_frag_timestamp = asf->packet_timestamp; |
844 |
|
845 |
asf->packet_time_delta = avio_r8(pb); |
846 |
rsize++; |
847 |
}else if(asf->packet_replic_size!=0){ |
848 |
av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
|
849 |
return -1; |
850 |
} |
851 |
if (asf->packet_flags & 0x01) { |
852 |
DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal |
853 |
if(asf->packet_frag_size > asf->packet_size_left - rsize){
|
854 |
av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
|
855 |
return -1; |
856 |
} |
857 |
//printf("Fragsize %d\n", asf->packet_frag_size);
|
858 |
} else {
|
859 |
asf->packet_frag_size = asf->packet_size_left - rsize; |
860 |
//printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
|
861 |
} |
862 |
if (asf->packet_replic_size == 1) { |
863 |
asf->packet_multi_size = asf->packet_frag_size; |
864 |
if (asf->packet_multi_size > asf->packet_size_left)
|
865 |
return -1; |
866 |
} |
867 |
asf->packet_size_left -= rsize; |
868 |
//printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
|
869 |
|
870 |
return 0; |
871 |
} |
872 |
|
873 |
/**
|
874 |
* Parse data from individual ASF packets (which were previously loaded
|
875 |
* with asf_get_packet()).
|
876 |
* @param s demux context
|
877 |
* @param pb context to read data from
|
878 |
* @param pkt pointer to store packet data into
|
879 |
* @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
|
880 |
* packets need to be loaded (through asf_get_packet())
|
881 |
*/
|
882 |
static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) |
883 |
{ |
884 |
ASFContext *asf = s->priv_data; |
885 |
ASFStream *asf_st = 0;
|
886 |
for (;;) {
|
887 |
int ret;
|
888 |
if(url_feof(pb))
|
889 |
return AVERROR_EOF;
|
890 |
if (asf->packet_size_left < FRAME_HEADER_SIZE
|
891 |
|| asf->packet_segments < 1) {
|
892 |
//asf->packet_size_left <= asf->packet_padsize) {
|
893 |
int ret = asf->packet_size_left + asf->packet_padsize;
|
894 |
//printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb));
|
895 |
assert(ret>=0);
|
896 |
/* fail safe */
|
897 |
avio_skip(pb, ret); |
898 |
|
899 |
asf->packet_pos= avio_tell(pb); |
900 |
if (asf->data_object_size != (uint64_t)-1 && |
901 |
(asf->packet_pos - asf->data_object_offset >= asf->data_object_size)) |
902 |
return AVERROR_EOF; /* Do not exceed the size of the data object */ |
903 |
return 1; |
904 |
} |
905 |
if (asf->packet_time_start == 0) { |
906 |
if(asf_read_frame_header(s, pb) < 0){ |
907 |
asf->packet_segments= 0;
|
908 |
continue;
|
909 |
} |
910 |
if (asf->stream_index < 0 |
911 |
|| s->streams[asf->stream_index]->discard >= AVDISCARD_ALL |
912 |
|| (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY) |
913 |
) { |
914 |
asf->packet_time_start = 0;
|
915 |
/* unhandled packet (should not happen) */
|
916 |
avio_skip(pb, asf->packet_frag_size); |
917 |
asf->packet_size_left -= asf->packet_frag_size; |
918 |
if(asf->stream_index < 0) |
919 |
av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
|
920 |
continue;
|
921 |
} |
922 |
asf->asf_st = s->streams[asf->stream_index]->priv_data; |
923 |
} |
924 |
asf_st = asf->asf_st; |
925 |
|
926 |
if (asf->packet_replic_size == 1) { |
927 |
// frag_offset is here used as the beginning timestamp
|
928 |
asf->packet_frag_timestamp = asf->packet_time_start; |
929 |
asf->packet_time_start += asf->packet_time_delta; |
930 |
asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb); |
931 |
asf->packet_size_left--; |
932 |
asf->packet_multi_size--; |
933 |
if (asf->packet_multi_size < asf->packet_obj_size)
|
934 |
{ |
935 |
asf->packet_time_start = 0;
|
936 |
avio_skip(pb, asf->packet_multi_size); |
937 |
asf->packet_size_left -= asf->packet_multi_size; |
938 |
continue;
|
939 |
} |
940 |
asf->packet_multi_size -= asf->packet_obj_size; |
941 |
//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);
|
942 |
} |
943 |
if( /*asf->packet_frag_size == asf->packet_obj_size*/ |
944 |
asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size |
945 |
&& asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){ |
946 |
av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
|
947 |
asf_st->frag_offset, asf->packet_frag_size, |
948 |
asf->packet_obj_size, asf_st->pkt.size); |
949 |
asf->packet_obj_size= asf_st->pkt.size; |
950 |
} |
951 |
|
952 |
if ( asf_st->pkt.size != asf->packet_obj_size
|
953 |
|| asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
|
954 |
if(asf_st->pkt.data){
|
955 |
av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
|
956 |
asf_st->frag_offset = 0;
|
957 |
av_free_packet(&asf_st->pkt); |
958 |
} |
959 |
/* new packet */
|
960 |
av_new_packet(&asf_st->pkt, asf->packet_obj_size); |
961 |
asf_st->seq = asf->packet_seq; |
962 |
asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll; |
963 |
asf_st->pkt.stream_index = asf->stream_index; |
964 |
asf_st->pkt.pos = |
965 |
asf_st->packet_pos= asf->packet_pos; |
966 |
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
|
967 |
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
|
968 |
//s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
|
969 |
if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
|
970 |
asf->packet_key_frame = 1;
|
971 |
if (asf->packet_key_frame)
|
972 |
asf_st->pkt.flags |= AV_PKT_FLAG_KEY; |
973 |
} |
974 |
|
975 |
/* read data */
|
976 |
//printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
|
977 |
// s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
|
978 |
// asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
|
979 |
asf->packet_size_left -= asf->packet_frag_size; |
980 |
if (asf->packet_size_left < 0) |
981 |
continue;
|
982 |
|
983 |
if( asf->packet_frag_offset >= asf_st->pkt.size
|
984 |
|| asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){ |
985 |
av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
|
986 |
asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size); |
987 |
continue;
|
988 |
} |
989 |
|
990 |
ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset, |
991 |
asf->packet_frag_size); |
992 |
if (ret != asf->packet_frag_size) {
|
993 |
if (ret < 0 || asf->packet_frag_offset + ret == 0) |
994 |
return ret < 0 ? ret : AVERROR_EOF; |
995 |
if (asf_st->ds_span > 1) { |
996 |
// scrambling, we can either drop it completely or fill the remainder
|
997 |
// TODO: should we fill the whole packet instead of just the current
|
998 |
// fragment?
|
999 |
memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
|
1000 |
asf->packet_frag_size - ret); |
1001 |
ret = asf->packet_frag_size; |
1002 |
} else
|
1003 |
// no scrambling, so we can return partial packets
|
1004 |
av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret); |
1005 |
} |
1006 |
if (s->key && s->keylen == 20) |
1007 |
ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset, |
1008 |
ret); |
1009 |
asf_st->frag_offset += ret; |
1010 |
/* test if whole packet is read */
|
1011 |
if (asf_st->frag_offset == asf_st->pkt.size) {
|
1012 |
//workaround for macroshit radio DVR-MS files
|
1013 |
if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
|
1014 |
&& asf_st->pkt.size > 100){
|
1015 |
int i;
|
1016 |
for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++); |
1017 |
if(i == asf_st->pkt.size){
|
1018 |
av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
|
1019 |
asf_st->frag_offset = 0;
|
1020 |
av_free_packet(&asf_st->pkt); |
1021 |
continue;
|
1022 |
} |
1023 |
} |
1024 |
|
1025 |
/* return packet */
|
1026 |
if (asf_st->ds_span > 1) { |
1027 |
if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
|
1028 |
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);
|
1029 |
}else{
|
1030 |
/* packet descrambling */
|
1031 |
uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE); |
1032 |
if (newdata) {
|
1033 |
int offset = 0; |
1034 |
memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
|
1035 |
while (offset < asf_st->pkt.size) {
|
1036 |
int off = offset / asf_st->ds_chunk_size;
|
1037 |
int row = off / asf_st->ds_span;
|
1038 |
int col = off % asf_st->ds_span;
|
1039 |
int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
|
1040 |
//printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
|
1041 |
|
1042 |
assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size); |
1043 |
assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
|
1044 |
memcpy(newdata + offset, |
1045 |
asf_st->pkt.data + idx * asf_st->ds_chunk_size, |
1046 |
asf_st->ds_chunk_size); |
1047 |
offset += asf_st->ds_chunk_size; |
1048 |
} |
1049 |
av_free(asf_st->pkt.data); |
1050 |
asf_st->pkt.data = newdata; |
1051 |
} |
1052 |
} |
1053 |
} |
1054 |
asf_st->frag_offset = 0;
|
1055 |
*pkt= asf_st->pkt; |
1056 |
//printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
|
1057 |
asf_st->pkt.size = 0;
|
1058 |
asf_st->pkt.data = 0;
|
1059 |
break; // packet completed |
1060 |
} |
1061 |
} |
1062 |
return 0; |
1063 |
} |
1064 |
|
1065 |
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt) |
1066 |
{ |
1067 |
ASFContext *asf = s->priv_data; |
1068 |
|
1069 |
for (;;) {
|
1070 |
int ret;
|
1071 |
|
1072 |
/* parse cached packets, if any */
|
1073 |
if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0) |
1074 |
return ret;
|
1075 |
if ((ret = ff_asf_get_packet(s, s->pb)) < 0) |
1076 |
assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
|
1077 |
asf->packet_time_start = 0;
|
1078 |
} |
1079 |
|
1080 |
return 0; |
1081 |
} |
1082 |
|
1083 |
// Added to support seeking after packets have been read
|
1084 |
// If information is not reset, read_packet fails due to
|
1085 |
// leftover information from previous reads
|
1086 |
static void asf_reset_header(AVFormatContext *s) |
1087 |
{ |
1088 |
ASFContext *asf = s->priv_data; |
1089 |
ASFStream *asf_st; |
1090 |
int i;
|
1091 |
|
1092 |
asf->packet_size_left = 0;
|
1093 |
asf->packet_segments = 0;
|
1094 |
asf->packet_flags = 0;
|
1095 |
asf->packet_property = 0;
|
1096 |
asf->packet_timestamp = 0;
|
1097 |
asf->packet_segsizetype = 0;
|
1098 |
asf->packet_segments = 0;
|
1099 |
asf->packet_seq = 0;
|
1100 |
asf->packet_replic_size = 0;
|
1101 |
asf->packet_key_frame = 0;
|
1102 |
asf->packet_padsize = 0;
|
1103 |
asf->packet_frag_offset = 0;
|
1104 |
asf->packet_frag_size = 0;
|
1105 |
asf->packet_frag_timestamp = 0;
|
1106 |
asf->packet_multi_size = 0;
|
1107 |
asf->packet_obj_size = 0;
|
1108 |
asf->packet_time_delta = 0;
|
1109 |
asf->packet_time_start = 0;
|
1110 |
|
1111 |
for(i=0; i<s->nb_streams; i++){ |
1112 |
asf_st= s->streams[i]->priv_data; |
1113 |
av_free_packet(&asf_st->pkt); |
1114 |
asf_st->frag_offset=0;
|
1115 |
asf_st->seq=0;
|
1116 |
} |
1117 |
asf->asf_st= NULL;
|
1118 |
} |
1119 |
|
1120 |
static int asf_read_close(AVFormatContext *s) |
1121 |
{ |
1122 |
int i;
|
1123 |
|
1124 |
asf_reset_header(s); |
1125 |
for(i=0;i<s->nb_streams;i++) { |
1126 |
AVStream *st = s->streams[i]; |
1127 |
av_free(st->codec->palctrl); |
1128 |
} |
1129 |
return 0; |
1130 |
} |
1131 |
|
1132 |
static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit) |
1133 |
{ |
1134 |
AVPacket pkt1, *pkt = &pkt1; |
1135 |
ASFStream *asf_st; |
1136 |
int64_t pts; |
1137 |
int64_t pos= *ppos; |
1138 |
int i;
|
1139 |
int64_t start_pos[ASF_MAX_STREAMS]; |
1140 |
|
1141 |
for(i=0; i<s->nb_streams; i++){ |
1142 |
start_pos[i]= pos; |
1143 |
} |
1144 |
|
1145 |
if (s->packet_size > 0) |
1146 |
pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
|
1147 |
*ppos= pos; |
1148 |
avio_seek(s->pb, pos, SEEK_SET); |
1149 |
|
1150 |
//printf("asf_read_pts\n");
|
1151 |
asf_reset_header(s); |
1152 |
for(;;){
|
1153 |
if (av_read_frame(s, pkt) < 0){ |
1154 |
av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
|
1155 |
return AV_NOPTS_VALUE;
|
1156 |
} |
1157 |
|
1158 |
pts= pkt->pts; |
1159 |
|
1160 |
av_free_packet(pkt); |
1161 |
if(pkt->flags&AV_PKT_FLAG_KEY){
|
1162 |
i= pkt->stream_index; |
1163 |
|
1164 |
asf_st= s->streams[i]->priv_data; |
1165 |
|
1166 |
// assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
|
1167 |
pos= asf_st->packet_pos; |
1168 |
|
1169 |
av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
|
1170 |
start_pos[i]= asf_st->packet_pos + 1;
|
1171 |
|
1172 |
if(pkt->stream_index == stream_index)
|
1173 |
break;
|
1174 |
} |
1175 |
} |
1176 |
|
1177 |
*ppos= pos; |
1178 |
//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
|
1179 |
|
1180 |
return pts;
|
1181 |
} |
1182 |
|
1183 |
static void asf_build_simple_index(AVFormatContext *s, int stream_index) |
1184 |
{ |
1185 |
ff_asf_guid g; |
1186 |
ASFContext *asf = s->priv_data; |
1187 |
int64_t current_pos= avio_tell(s->pb); |
1188 |
int i;
|
1189 |
|
1190 |
avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET); |
1191 |
ff_get_guid(s->pb, &g); |
1192 |
|
1193 |
/* the data object can be followed by other top-level objects,
|
1194 |
skip them until the simple index object is reached */
|
1195 |
while (ff_guidcmp(&g, &index_guid)) {
|
1196 |
int64_t gsize= avio_rl64(s->pb); |
1197 |
if (gsize < 24 || url_feof(s->pb)) { |
1198 |
avio_seek(s->pb, current_pos, SEEK_SET); |
1199 |
return;
|
1200 |
} |
1201 |
avio_skip(s->pb, gsize-24);
|
1202 |
ff_get_guid(s->pb, &g); |
1203 |
} |
1204 |
|
1205 |
{ |
1206 |
int64_t itime, last_pos=-1;
|
1207 |
int pct, ict;
|
1208 |
int64_t av_unused gsize= avio_rl64(s->pb); |
1209 |
ff_get_guid(s->pb, &g); |
1210 |
itime=avio_rl64(s->pb); |
1211 |
pct=avio_rl32(s->pb); |
1212 |
ict=avio_rl32(s->pb); |
1213 |
av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict); |
1214 |
|
1215 |
for (i=0;i<ict;i++){ |
1216 |
int pktnum=avio_rl32(s->pb);
|
1217 |
int pktct =avio_rl16(s->pb);
|
1218 |
int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum; |
1219 |
int64_t index_pts= av_rescale(itime, i, 10000);
|
1220 |
|
1221 |
if(pos != last_pos){
|
1222 |
av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
|
1223 |
av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
|
1224 |
last_pos=pos; |
1225 |
} |
1226 |
} |
1227 |
asf->index_read= 1;
|
1228 |
} |
1229 |
avio_seek(s->pb, current_pos, SEEK_SET); |
1230 |
} |
1231 |
|
1232 |
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags) |
1233 |
{ |
1234 |
ASFContext *asf = s->priv_data; |
1235 |
AVStream *st = s->streams[stream_index]; |
1236 |
int64_t pos; |
1237 |
int index;
|
1238 |
|
1239 |
if (s->packet_size <= 0) |
1240 |
return -1; |
1241 |
|
1242 |
/* Try using the protocol's read_seek if available */
|
1243 |
if(s->pb) {
|
1244 |
int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
|
1245 |
if(ret >= 0) |
1246 |
asf_reset_header(s); |
1247 |
if (ret != AVERROR(ENOSYS))
|
1248 |
return ret;
|
1249 |
} |
1250 |
|
1251 |
if (!asf->index_read)
|
1252 |
asf_build_simple_index(s, stream_index); |
1253 |
|
1254 |
if(!(asf->index_read && st->index_entries)){
|
1255 |
if(av_seek_frame_binary(s, stream_index, pts, flags)<0) |
1256 |
return -1; |
1257 |
}else{
|
1258 |
index= av_index_search_timestamp(st, pts, flags); |
1259 |
if(index<0) |
1260 |
return -1; |
1261 |
|
1262 |
/* find the position */
|
1263 |
pos = st->index_entries[index].pos; |
1264 |
|
1265 |
// various attempts to find key frame have failed so far
|
1266 |
// asf_reset_header(s);
|
1267 |
// avio_seek(s->pb, pos, SEEK_SET);
|
1268 |
// key_pos = pos;
|
1269 |
// for(i=0;i<16;i++){
|
1270 |
// pos = avio_tell(s->pb);
|
1271 |
// if (av_read_frame(s, &pkt) < 0){
|
1272 |
// av_log(s, AV_LOG_INFO, "seek failed\n");
|
1273 |
// return -1;
|
1274 |
// }
|
1275 |
// asf_st = s->streams[stream_index]->priv_data;
|
1276 |
// pos += st->parser->frame_offset;
|
1277 |
//
|
1278 |
// if (pkt.size > b) {
|
1279 |
// b = pkt.size;
|
1280 |
// key_pos = pos;
|
1281 |
// }
|
1282 |
//
|
1283 |
// av_free_packet(&pkt);
|
1284 |
// }
|
1285 |
|
1286 |
/* do the seek */
|
1287 |
av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos); |
1288 |
avio_seek(s->pb, pos, SEEK_SET); |
1289 |
} |
1290 |
asf_reset_header(s); |
1291 |
return 0; |
1292 |
} |
1293 |
|
1294 |
AVInputFormat ff_asf_demuxer = { |
1295 |
"asf",
|
1296 |
NULL_IF_CONFIG_SMALL("ASF format"),
|
1297 |
sizeof(ASFContext),
|
1298 |
asf_probe, |
1299 |
asf_read_header, |
1300 |
asf_read_packet, |
1301 |
asf_read_close, |
1302 |
asf_read_seek, |
1303 |
asf_read_pts, |
1304 |
}; |