mirror of https://git.ffmpeg.org/ffmpeg.git
1727 lines
60 KiB
C
1727 lines
60 KiB
C
/*
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* Microsoft Advanced Streaming Format demuxer
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* Copyright (c) 2014 Alexandra Hájková
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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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#include "libavutil/attributes.h"
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/bswap.h"
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#include "libavutil/common.h"
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#include "libavutil/dict.h"
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#include "libavutil/internal.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "libavutil/time_internal.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "avlanguage.h"
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#include "id3v2.h"
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#include "internal.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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#define ASF_BOOL 0x2
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#define ASF_WORD 0x5
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#define ASF_GUID 0x6
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#define ASF_DWORD 0x3
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#define ASF_QWORD 0x4
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#define ASF_UNICODE 0x0
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#define ASF_FLAG_BROADCAST 0x1
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#define ASF_BYTE_ARRAY 0x1
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#define ASF_TYPE_AUDIO 0x2
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#define ASF_TYPE_VIDEO 0x1
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#define ASF_STREAM_NUM 0x7F
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#define ASF_MAX_STREAMS 128
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#define BMP_HEADER_SIZE 40
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#define ASF_NUM_OF_PAYLOADS 0x3F
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#define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60
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#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
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typedef struct GUIDParseTable {
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const char *name;
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ff_asf_guid guid;
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int (*read_object)(AVFormatContext *, const struct GUIDParseTable *);
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int is_subobject;
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} GUIDParseTable;
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typedef struct ASFPacket {
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AVPacket avpkt;
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int64_t dts;
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uint32_t frame_num; // ASF payloads with the same number are parts of the same frame
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int flags;
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int data_size;
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int duration;
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int size_left;
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uint8_t stream_index;
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} ASFPacket;
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typedef struct ASFStream {
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uint8_t stream_index; // from packet header
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int index; // stream index in AVFormatContext, set in asf_read_stream_properties
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int type;
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int indexed; // added index entries from the Simple Index Object or not
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int8_t span; // for deinterleaving
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uint16_t virtual_pkt_len;
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uint16_t virtual_chunk_len;
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int16_t lang_idx;
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ASFPacket pkt;
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} ASFStream;
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typedef struct ASFStreamData{
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char langs[32];
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AVDictionary *asf_met; // for storing per-stream metadata
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AVRational aspect_ratio;
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} ASFStreamData;
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typedef struct ASFContext {
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int data_reached;
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int is_simple_index; // is simple index present or not 1/0
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int is_header;
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uint64_t preroll;
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uint64_t nb_packets; // ASF packets
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uint32_t packet_size;
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int64_t send_time;
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int duration;
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uint32_t b_flags; // flags with broadcast flag
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uint32_t prop_flags; // file properties object flags
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uint64_t data_size; // data object size
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uint64_t unknown_size; // size of the unknown object
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int64_t offset; // offset of the current object
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int64_t data_offset;
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int64_t first_packet_offset; // packet offset
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int64_t unknown_offset; // for top level header objects or subobjects without specified behavior
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// ASF file must not contain more than 128 streams according to the specification
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ASFStream *asf_st[ASF_MAX_STREAMS];
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ASFStreamData asf_sd[ASF_MAX_STREAMS];
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int nb_streams;
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int stream_index; // from packet header, for the subpayload case
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// packet parameteres
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uint64_t sub_header_offset; // offset of subplayload header
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int64_t sub_dts;
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uint8_t dts_delta; // for subpayloads
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uint32_t packet_size_internal; // packet size stored inside ASFPacket, can be 0
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int64_t dts;
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int64_t packet_offset; // offset of the current packet inside Data Object
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uint32_t pad_len; // padding after payload
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uint32_t rep_data_len;
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// packet state
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uint64_t sub_left; // subpayloads left or not
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unsigned int nb_sub; // number of subpayloads read so far from the current ASF packet
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uint16_t mult_sub_len; // total length of subpayloads array inside multiple payload
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uint64_t nb_mult_left; // multiple payloads left
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int return_subpayload;
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enum {
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PARSE_PACKET_HEADER,
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READ_SINGLE,
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READ_MULTI,
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READ_MULTI_SUB
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} state;
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} ASFContext;
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static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size);
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static const GUIDParseTable *find_guid(ff_asf_guid guid);
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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/2;
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else
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return 0;
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}
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static void swap_guid(ff_asf_guid guid)
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{
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FFSWAP(unsigned char, guid[0], guid[3]);
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FFSWAP(unsigned char, guid[1], guid[2]);
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FFSWAP(unsigned char, guid[4], guid[5]);
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FFSWAP(unsigned char, guid[6], guid[7]);
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}
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static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
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{
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if (avio_tell(pb) != offset + size)
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avio_seek(pb, offset + size, SEEK_SET);
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}
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static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
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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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uint64_t size = avio_rl64(pb);
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int ret;
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if (asf->is_header)
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asf->unknown_size = size;
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asf->is_header = 0;
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if (!g->is_subobject) {
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if (!(ret = strcmp(g->name, "Header Extension")))
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avio_skip(pb, 22); // skip reserved fields and Data Size
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if ((ret = detect_unknown_subobject(s, asf->unknown_offset,
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asf->unknown_size)) < 0)
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return ret;
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} else
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avio_skip(pb, size - 24);
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return 0;
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}
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static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
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{
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char *q = buf;
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int ret = 0;
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if (buflen <= 0)
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return AVERROR(EINVAL);
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while (ret + 1 < maxlen) {
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uint8_t tmp;
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uint32_t ch;
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GET_UTF16(ch, (ret += 2) <= maxlen ? avio_rl16(pb) : 0, break;);
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PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)
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}
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*q = 0;
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return ret;
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}
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static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
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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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uint64_t size = avio_rl64(pb);
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int i, nb_markers, ret;
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size_t len;
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char name[1024];
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avio_skip(pb, 8);
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avio_skip(pb, 8); // skip reserved GUID
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nb_markers = avio_rl32(pb);
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avio_skip(pb, 2); // skip reserved field
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len = avio_rl16(pb);
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for (i = 0; i < len; i++)
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avio_skip(pb, 1);
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for (i = 0; i < nb_markers; i++) {
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int64_t pts;
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avio_skip(pb, 8);
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pts = avio_rl64(pb);
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pts -= asf->preroll * 10000;
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avio_skip(pb, 2); // entry length
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avio_skip(pb, 4); // send time
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avio_skip(pb, 4); // flags
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len = avio_rl32(pb);
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if ((ret = avio_get_str16le(pb, len, name,
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sizeof(name))) < len)
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avio_skip(pb, len - ret);
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avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
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AV_NOPTS_VALUE, name);
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}
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align_position(pb, asf->offset, size);
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return 0;
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}
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static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len,
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unsigned char *ch, uint16_t buflen)
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{
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AVIOContext *pb = s->pb;
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avio_get_str16le(pb, len, ch, buflen);
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if (av_dict_set(&s->metadata, title, ch, 0) < 0)
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av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
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return 0;
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}
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static int asf_read_value(AVFormatContext *s, uint8_t *name, uint16_t name_len,
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uint16_t val_len, int type, AVDictionary **met)
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{
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int ret;
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uint8_t *value;
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uint16_t buflen = 2 * val_len + 1;
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AVIOContext *pb = s->pb;
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value = av_malloc(buflen);
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if (!value)
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return AVERROR(ENOMEM);
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if (type == ASF_UNICODE) {
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// get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer
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if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
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goto failed;
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if (av_dict_set(met, name, value, 0) < 0)
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av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
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} else {
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char buf[256];
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if (val_len > sizeof(buf)) {
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ret = AVERROR_INVALIDDATA;
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goto failed;
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}
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if ((ret = avio_read(pb, value, val_len)) < 0)
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goto failed;
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if (ret < 2 * val_len)
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value[ret] = '\0';
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else
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value[2 * val_len - 1] = '\0';
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snprintf(buf, sizeof(buf), "%s", value);
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if (av_dict_set(met, name, buf, 0) < 0)
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av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
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}
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av_freep(&value);
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return 0;
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failed:
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av_freep(&value);
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return ret;
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}
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static int asf_read_generic_value(AVFormatContext *s, uint8_t *name, uint16_t name_len,
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int type, AVDictionary **met)
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{
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AVIOContext *pb = s->pb;
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uint64_t value;
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char buf[32];
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switch (type) {
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case ASF_BOOL:
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value = avio_rl32(pb);
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break;
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case ASF_DWORD:
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value = avio_rl32(pb);
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break;
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case ASF_QWORD:
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value = avio_rl64(pb);
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break;
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case ASF_WORD:
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value = avio_rl16(pb);
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break;
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default:
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av_freep(&name);
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return AVERROR_INVALIDDATA;
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}
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snprintf(buf, sizeof(buf), "%"PRIu64, value);
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if (av_dict_set(met, name, buf, 0) < 0)
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av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
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return 0;
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}
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/* MSDN claims that this should be "compatible with the ID3 frame, APIC",
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* but in reality this is only loosely similar */
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static int asf_read_picture(AVFormatContext *s, int len)
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{
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ASFContext *asf = s->priv_data;
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AVPacket pkt = { 0 };
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const CodecMime *mime = ff_id3v2_mime_tags;
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enum AVCodecID id = AV_CODEC_ID_NONE;
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char mimetype[64];
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uint8_t *desc = NULL;
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AVStream *st = NULL;
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int ret, type, picsize, desc_len;
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ASFStream *asf_st;
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/* type + picsize + mime + desc */
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if (len < 1 + 4 + 2 + 2) {
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av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
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return AVERROR_INVALIDDATA;
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}
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/* picture type */
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type = avio_r8(s->pb);
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len--;
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if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
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av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
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type = 0;
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}
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/* picture data size */
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picsize = avio_rl32(s->pb);
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len -= 4;
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/* picture MIME type */
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len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
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while (mime->id != AV_CODEC_ID_NONE) {
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if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
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id = mime->id;
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break;
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}
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mime++;
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}
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if (id == AV_CODEC_ID_NONE) {
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av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
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mimetype);
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return 0;
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}
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if (picsize >= len) {
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av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
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picsize, len);
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return AVERROR_INVALIDDATA;
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}
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/* picture description */
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desc_len = (len - picsize) * 2 + 1;
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desc = av_malloc(desc_len);
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if (!desc)
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return AVERROR(ENOMEM);
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len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
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ret = av_get_packet(s->pb, &pkt, picsize);
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if (ret < 0)
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goto fail;
|
|
|
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st = avformat_new_stream(s, NULL);
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if (!st) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
|
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asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
|
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asf_st = asf->asf_st[asf->nb_streams];
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if (!asf_st) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
|
|
|
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st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
|
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st->codec->codec_type = asf_st->type = AVMEDIA_TYPE_VIDEO;
|
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st->codec->codec_id = id;
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st->attached_pic = pkt;
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st->attached_pic.stream_index = asf_st->index = st->index;
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st->attached_pic.flags |= AV_PKT_FLAG_KEY;
|
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|
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asf->nb_streams++;
|
|
|
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if (*desc) {
|
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if (av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL) < 0)
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av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
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} else
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av_freep(&desc);
|
|
|
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if (av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0) < 0)
|
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av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
|
|
|
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return 0;
|
|
|
|
fail:
|
|
av_freep(&desc);
|
|
av_free_packet(&pkt);
|
|
return ret;
|
|
}
|
|
|
|
static void get_id3_tag(AVFormatContext *s, int len)
|
|
{
|
|
ID3v2ExtraMeta *id3v2_extra_meta = NULL;
|
|
|
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ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
|
|
if (id3v2_extra_meta)
|
|
ff_id3v2_parse_apic(s, &id3v2_extra_meta);
|
|
ff_id3v2_free_extra_meta(&id3v2_extra_meta);
|
|
}
|
|
|
|
static int process_metadata(AVFormatContext *s, uint8_t *name, uint16_t name_len,
|
|
uint16_t val_len, uint16_t type, AVDictionary **met)
|
|
{
|
|
int ret;
|
|
ff_asf_guid guid;
|
|
|
|
if (val_len) {
|
|
switch (type) {
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case ASF_UNICODE:
|
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asf_read_value(s, name, name_len, val_len, type, met);
|
|
break;
|
|
case ASF_BYTE_ARRAY:
|
|
if (!strcmp(name, "WM/Picture")) // handle cover art
|
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asf_read_picture(s, val_len);
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else if (!strcmp(name, "ID3")) // handle ID3 tag
|
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get_id3_tag(s, val_len);
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|
else
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asf_read_value(s, name, name_len, val_len, type, met);
|
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break;
|
|
case ASF_GUID:
|
|
ff_get_guid(s->pb, &guid);
|
|
break;
|
|
default:
|
|
if ((ret = asf_read_generic_value(s, name, name_len, type, met)) < 0)
|
|
return ret;
|
|
break;
|
|
}
|
|
}
|
|
av_freep(&name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint64_t size = avio_rl64(pb);
|
|
uint16_t nb_desc = avio_rl16(pb);
|
|
int i, ret;
|
|
|
|
for (i = 0; i < nb_desc; i++) {
|
|
uint16_t name_len, type, val_len;
|
|
uint8_t *name = NULL;
|
|
|
|
name_len = avio_rl16(pb);
|
|
if (!name_len)
|
|
return AVERROR_INVALIDDATA;
|
|
name = av_malloc(name_len);
|
|
if (!name)
|
|
return AVERROR(ENOMEM);
|
|
avio_get_str16le(pb, name_len, name,
|
|
name_len);
|
|
type = avio_rl16(pb);
|
|
val_len = avio_rl16(pb);
|
|
|
|
if ((ret = process_metadata(s, name, name_len, val_len, type, &s->metadata)) < 0)
|
|
return ret;
|
|
}
|
|
|
|
align_position(pb, asf->offset, size);
|
|
return 0;
|
|
}
|
|
|
|
static AVStream *find_stream(AVFormatContext *s, uint16_t st_num)
|
|
{
|
|
AVStream *st = NULL;
|
|
ASFContext *asf = s->priv_data;
|
|
int i;
|
|
|
|
for (i = 0; i < asf->nb_streams; i++) {
|
|
if (asf->asf_st[i]->stream_index == st_num) {
|
|
st = s->streams[asf->asf_st[i]->index];
|
|
break;
|
|
}
|
|
}
|
|
|
|
return st;
|
|
}
|
|
|
|
static void asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint16_t value = 0;
|
|
|
|
value = avio_rl16(pb);
|
|
|
|
if (st_num < ASF_MAX_STREAMS) {
|
|
if (!strcmp(name, "AspectRatioX"))
|
|
asf->asf_sd[st_num].aspect_ratio.num = value;
|
|
else
|
|
asf->asf_sd[st_num].aspect_ratio.den = value;
|
|
}
|
|
}
|
|
|
|
static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint64_t size = avio_rl64(pb);
|
|
uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list
|
|
int i, ret;
|
|
|
|
for (i = 0; i < nb_recs; i++) {
|
|
uint16_t name_len, buflen, type, val_len, st_num;
|
|
uint8_t *name = NULL;
|
|
|
|
avio_skip(pb, 2); // skip reserved field
|
|
st_num = avio_rl16(pb);
|
|
name_len = avio_rl16(pb);
|
|
buflen = 2 * name_len + 1;
|
|
if (!name_len)
|
|
break;
|
|
type = avio_rl16(pb);
|
|
val_len = avio_rl32(pb);
|
|
name = av_malloc(name_len);
|
|
if (!name)
|
|
return AVERROR(ENOMEM);
|
|
avio_get_str16le(pb, name_len, name,
|
|
buflen);
|
|
|
|
if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) {
|
|
asf_store_aspect_ratio(s, st_num, name);
|
|
} else {
|
|
if (st_num < ASF_MAX_STREAMS) {
|
|
if ((ret = process_metadata(s, name, name_len, val_len, type,
|
|
&asf->asf_sd[st_num].asf_met)) < 0)
|
|
break;
|
|
} else
|
|
av_freep(&name);
|
|
}
|
|
}
|
|
|
|
align_position(pb, asf->offset, size);
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int i;
|
|
static const char *const titles[] =
|
|
{ "Title", "Author", "Copyright", "Description", "Rate" };
|
|
uint16_t len[5], buflen[5] = { 0 };
|
|
uint8_t *ch;
|
|
uint64_t size = avio_rl64(pb);
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
len[i] = avio_rl16(pb);
|
|
// utf8 string should be <= 2 * utf16 string, extra byte for the terminator
|
|
buflen[i] = 2 * len[i] + 1;
|
|
}
|
|
|
|
for (i = 0; i < 5; i++) {
|
|
ch = av_malloc(buflen[i]);
|
|
if (!ch)
|
|
return(AVERROR(ENOMEM));
|
|
asf_read_metadata(s, titles[i], len[i], ch, buflen[i]);
|
|
av_freep(&ch);
|
|
}
|
|
align_position(pb, asf->offset, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint64_t creation_time;
|
|
|
|
avio_rl64(pb); // read object size
|
|
avio_skip(pb, 16); // skip File ID
|
|
avio_skip(pb, 8); // skip File size
|
|
creation_time = avio_rl64(pb);
|
|
if (!(asf->b_flags & ASF_FLAG_BROADCAST)) {
|
|
struct tm tmbuf;
|
|
struct tm *tm;
|
|
char buf[64];
|
|
|
|
// creation date is in 100 ns units from 1 Jan 1601, conversion to s
|
|
creation_time /= 10000000;
|
|
// there are 11644473600 seconds between 1 Jan 1601 and 1 Jan 1970
|
|
creation_time -= 11644473600;
|
|
tm = gmtime_r(&creation_time, &tmbuf);
|
|
if (tm) {
|
|
if (!strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm))
|
|
buf[0] = '\0';
|
|
} else
|
|
buf[0] = '\0';
|
|
if (buf[0]) {
|
|
if (av_dict_set(&s->metadata, "creation_time", buf, 0) < 0)
|
|
av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
|
|
}
|
|
}
|
|
asf->nb_packets = avio_rl64(pb);
|
|
asf->duration = avio_rl64(pb) / 10000; // stream duration
|
|
avio_skip(pb, 8); // skip send duration
|
|
asf->preroll = avio_rl64(pb);
|
|
asf->duration -= asf->preroll;
|
|
asf->b_flags = avio_rl32(pb);
|
|
avio_skip(pb, 4); // skip minimal packet size
|
|
asf->packet_size = avio_rl32(pb);
|
|
avio_skip(pb, 4); // skip max_bitrate
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int parse_video_info(AVIOContext *pb, AVStream *st)
|
|
{
|
|
uint16_t size;
|
|
unsigned int tag;
|
|
|
|
st->codec->width = avio_rl32(pb);
|
|
st->codec->height = avio_rl32(pb);
|
|
avio_skip(pb, 1); // skip reserved flags
|
|
size = avio_rl16(pb); // size of the Format Data
|
|
tag = ff_get_bmp_header(pb, st, NULL);
|
|
st->codec->codec_tag = tag;
|
|
st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
|
|
|
|
if (size > BMP_HEADER_SIZE) {
|
|
int ret;
|
|
st->codec->extradata_size = size - BMP_HEADER_SIZE;
|
|
if (!(st->codec->extradata = av_malloc(st->codec->extradata_size +
|
|
FF_INPUT_BUFFER_PADDING_SIZE))) {
|
|
st->codec->extradata_size = 0;
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
memset(st->codec->extradata + st->codec->extradata_size , 0,
|
|
FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if ((ret = avio_read(pb, st->codec->extradata,
|
|
st->codec->extradata_size)) < 0)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint64_t size;
|
|
uint32_t err_data_len, ts_data_len; // type specific data length
|
|
uint16_t flags;
|
|
ff_asf_guid stream_type;
|
|
enum AVMediaType type;
|
|
int i, ret;
|
|
uint8_t stream_index;
|
|
AVStream *st;
|
|
ASFStream *asf_st;
|
|
|
|
// ASF file must not contain more than 128 streams according to the specification
|
|
if (asf->nb_streams >= ASF_MAX_STREAMS)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
size = avio_rl64(pb);
|
|
ff_get_guid(pb, &stream_type);
|
|
if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
|
|
type = AVMEDIA_TYPE_AUDIO;
|
|
else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
|
|
type = AVMEDIA_TYPE_VIDEO;
|
|
else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
|
|
type = AVMEDIA_TYPE_VIDEO;
|
|
else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
|
|
type = AVMEDIA_TYPE_DATA;
|
|
else if (!ff_guidcmp(&stream_type,
|
|
&ff_asf_ext_stream_embed_stream_header))
|
|
type = AVMEDIA_TYPE_UNKNOWN;
|
|
else
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
ff_get_guid(pb, &stream_type); // error correction type
|
|
avio_skip(pb, 8); // skip the time offset
|
|
ts_data_len = avio_rl32(pb);
|
|
err_data_len = avio_rl32(pb);
|
|
flags = avio_rl16(pb); // bit 15 - Encrypted Content
|
|
|
|
stream_index = flags & ASF_STREAM_NUM;
|
|
for (i = 0; i < asf->nb_streams; i++)
|
|
if (stream_index == asf->asf_st[i]->stream_index) {
|
|
av_log(s, AV_LOG_WARNING,
|
|
"Duplicate stream found, this stream will be ignored.\n");
|
|
align_position(pb, asf->offset, size);
|
|
return 0;
|
|
}
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
|
|
st->codec->codec_type = type;
|
|
asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
|
|
if (!asf->asf_st[asf->nb_streams])
|
|
return AVERROR(ENOMEM);
|
|
asf_st = asf->asf_st[asf->nb_streams];
|
|
asf->nb_streams++;
|
|
asf_st->stream_index = stream_index;
|
|
asf_st->index = st->index;
|
|
asf_st->indexed = 0;
|
|
st->id = flags & ASF_STREAM_NUM;
|
|
av_init_packet(&asf_st->pkt.avpkt);
|
|
asf_st->pkt.data_size = 0;
|
|
avio_skip(pb, 4); // skip reserved field
|
|
|
|
switch (type) {
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
asf_st->type = AVMEDIA_TYPE_AUDIO;
|
|
if ((ret = ff_get_wav_header(s, pb, st->codec, ts_data_len, 0)) < 0)
|
|
return ret;
|
|
break;
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
asf_st->type = AVMEDIA_TYPE_VIDEO;
|
|
if ((ret = parse_video_info(pb, st)) < 0)
|
|
return ret;
|
|
break;
|
|
default:
|
|
avio_skip(pb, ts_data_len);
|
|
break;
|
|
}
|
|
|
|
if (err_data_len) {
|
|
if (type == AVMEDIA_TYPE_AUDIO) {
|
|
uint8_t span = avio_r8(pb);
|
|
if (span > 1) {
|
|
asf_st->span = span;
|
|
asf_st->virtual_pkt_len = avio_rl16(pb);
|
|
asf_st->virtual_chunk_len = avio_rl16(pb);
|
|
if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(pb, err_data_len - 5);
|
|
} else
|
|
avio_skip(pb, err_data_len - 1);
|
|
} else
|
|
avio_skip(pb, err_data_len);
|
|
}
|
|
|
|
align_position(pb, asf->offset, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
|
|
{
|
|
// language abbr should contain at least 2 chars
|
|
if (rfc1766 && strlen(rfc1766) > 1) {
|
|
const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
|
|
const char *iso6392 = av_convert_lang_to(primary_tag,
|
|
AV_LANG_ISO639_2_BIBL);
|
|
if (iso6392)
|
|
if (av_dict_set(met, "language", iso6392, 0) < 0)
|
|
av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
|
|
}
|
|
}
|
|
|
|
static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st = NULL;
|
|
ff_asf_guid guid;
|
|
uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
|
|
int i, ret;
|
|
uint32_t bitrate;
|
|
uint64_t start_time, end_time, time_per_frame;
|
|
uint64_t size = avio_rl64(pb);
|
|
|
|
start_time = avio_rl64(pb);
|
|
end_time = avio_rl64(pb);
|
|
bitrate = avio_rl32(pb);
|
|
avio_skip(pb, 28); // skip some unused values
|
|
st_num = avio_rl16(pb);
|
|
st_num &= ASF_STREAM_NUM;
|
|
lang_idx = avio_rl16(pb); // Stream Language ID Index
|
|
for (i = 0; i < asf->nb_streams; i++) {
|
|
if (st_num == asf->asf_st[i]->stream_index) {
|
|
st = s->streams[asf->asf_st[i]->index];
|
|
asf->asf_st[i]->lang_idx = lang_idx;
|
|
break;
|
|
}
|
|
}
|
|
time_per_frame = avio_rl64(pb); // average time per frame
|
|
if (st) {
|
|
st->start_time = start_time;
|
|
st->duration = end_time - start_time;
|
|
st->codec->bit_rate = bitrate;
|
|
st->avg_frame_rate.num = 10000000;
|
|
st->avg_frame_rate.den = time_per_frame;
|
|
}
|
|
nb_st_name = avio_rl16(pb);
|
|
nb_pay_exts = avio_rl16(pb);
|
|
for (i = 0; i < nb_st_name; i++) {
|
|
uint16_t len;
|
|
|
|
avio_rl16(pb); // Language ID Index
|
|
len = avio_rl16(pb);
|
|
avio_skip(pb, len);
|
|
}
|
|
|
|
for (i = 0; i < nb_pay_exts; i++) {
|
|
uint32_t len;
|
|
avio_skip(pb, 16); // Extension System ID
|
|
avio_skip(pb, 2); // Extension Data Size
|
|
len = avio_rl32(pb);
|
|
avio_skip(pb, len);
|
|
}
|
|
|
|
if ((ret = ff_get_guid(pb, &guid)) < 0) {
|
|
align_position(pb, asf->offset, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
g = find_guid(guid);
|
|
if (g && !(strcmp(g->name, "Stream Properties"))) {
|
|
if ((ret = g->read_object(s, g)) < 0)
|
|
return ret;
|
|
}
|
|
|
|
align_position(pb, asf->offset, size);
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int i, ret;
|
|
uint64_t size = avio_rl64(pb);
|
|
uint16_t nb_langs = avio_rl16(pb);
|
|
|
|
if (nb_langs < ASF_MAX_STREAMS) {
|
|
for (i = 0; i < nb_langs; i++) {
|
|
size_t len;
|
|
len = avio_r8(pb);
|
|
if (!len)
|
|
len = 6;
|
|
if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
|
|
sizeof(asf->asf_sd[i].langs))) < 0) {
|
|
return ret;
|
|
}
|
|
}
|
|
}
|
|
|
|
align_position(pb, asf->offset, size);
|
|
return 0;
|
|
}
|
|
|
|
// returns data object offset when reading this object for the first time
|
|
static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint64_t size = asf->data_size = avio_rl64(pb);
|
|
int i;
|
|
|
|
if (!asf->data_reached && pb->seekable) {
|
|
asf->data_reached = 1;
|
|
asf->data_offset = asf->offset;
|
|
}
|
|
|
|
for (i = 0; i < asf->nb_streams; i++) {
|
|
if (!(asf->b_flags & ASF_FLAG_BROADCAST))
|
|
s->streams[i]->duration = asf->duration;
|
|
}
|
|
asf->nb_mult_left = 0;
|
|
asf->sub_left = 0;
|
|
asf->state = PARSE_PACKET_HEADER;
|
|
asf->return_subpayload = 0;
|
|
asf->packet_size_internal = 0;
|
|
avio_skip(pb, 16); // skip File ID
|
|
size = avio_rl64(pb); // Total Data Packets
|
|
if (size != asf->nb_packets)
|
|
av_log(s, AV_LOG_WARNING,
|
|
"Number of Packets from File Properties Object is not equal to Total"
|
|
"Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
|
|
size, asf->nb_packets);
|
|
avio_skip(pb, 2); // skip reserved field
|
|
asf->first_packet_offset = avio_tell(pb);
|
|
if (pb->seekable)
|
|
align_position(pb, asf->offset, asf->data_size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st = NULL;
|
|
uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
|
|
uint32_t pkt_num, nb_entries;
|
|
int32_t prev_pkt_num = -1;
|
|
int i;
|
|
uint64_t size = avio_rl64(pb);
|
|
|
|
// simple index objects should be ordered by stream number, this loop tries to find
|
|
// the first not indexed video stream
|
|
for (i = 0; i < asf->nb_streams; i++) {
|
|
if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
|
|
asf->asf_st[i]->indexed = 1;
|
|
st = s->streams[asf->asf_st[i]->index];
|
|
break;
|
|
}
|
|
}
|
|
if (!st) {
|
|
avio_skip(pb, size - 24); // if there's no video stream, skip index object
|
|
return 0;
|
|
}
|
|
avio_skip(pb, 16); // skip File ID
|
|
interval = avio_rl64(pb);
|
|
avio_skip(pb, 4);
|
|
nb_entries = avio_rl32(pb);
|
|
for (i = 0; i < nb_entries; i++) {
|
|
pkt_num = avio_rl32(pb);
|
|
avio_skip(pb, 2);
|
|
if (prev_pkt_num != pkt_num) {
|
|
av_add_index_entry(st, asf->first_packet_offset + asf->packet_size *
|
|
pkt_num, av_rescale(interval, i, 10000),
|
|
asf->packet_size, 0, AVINDEX_KEYFRAME);
|
|
prev_pkt_num = pkt_num;
|
|
}
|
|
}
|
|
asf->is_simple_index = 1;
|
|
align_position(pb, asf->offset, size);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const GUIDParseTable gdef[] = {
|
|
{ "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
|
|
{ "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
|
|
{ "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
|
|
{ "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
|
|
{ "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
|
|
{ "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
|
|
{ "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
|
|
{ "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
|
|
{ "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
|
|
{ "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
|
|
{ "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
|
|
{ "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
|
|
{ "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
|
|
{ "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
|
|
{ "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
|
|
{ "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
|
|
{ "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
|
|
{ "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
|
|
{ "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
|
|
{ "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
|
|
{ "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
|
|
{ "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
|
|
{ "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
|
|
{ "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
|
|
{ "Extended Stream Properties", { 0x14, 0xE6, 0xA5, 0xCB, 0xC6, 0x72, 0x43, 0x32, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A }, asf_read_ext_stream_properties, 1 },
|
|
{ "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
|
|
{ "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
|
|
{ "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
|
|
{ "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
|
|
{ "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
|
|
{ "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
|
|
{ "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
|
|
{ "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
|
|
{ "Content Encryption System Windows Media DRM Network Devices",
|
|
{ 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
|
|
{ "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
|
|
{ "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
|
|
{ "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
|
|
{ "Bandwith Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
|
|
{ "Bandwith Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
|
|
{ "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
|
|
{ "Payload Extension System File Name", { 0xE1, 0x65, 0xEC, 0x0E, 0x19, 0xED, 0x45, 0xD7, 0xB4, 0xA7, 0x25, 0xCB, 0xD1, 0xE2, 0x8E, 0x9B }, asf_read_unknown, 1 },
|
|
{ "Payload Extension System Content Type", { 0xD5, 0x90, 0xDC, 0x20, 0x07, 0xBC, 0x43, 0x6C, 0x9C, 0xF7, 0xF3, 0xBB, 0xFB, 0xF1, 0xA4, 0xDC }, asf_read_unknown, 1 },
|
|
{ "Payload Extension System Pixel Aspect Ratio", { 0x1, 0x1E, 0xE5, 0x54, 0xF9, 0xEA, 0x4B, 0xC8, 0x82, 0x1A, 0x37, 0x6B, 0x74, 0xE4, 0xC4, 0xB8 }, asf_read_unknown, 1 },
|
|
{ "Payload Extension System Sample Duration", { 0xC6, 0xBD, 0x94, 0x50, 0x86, 0x7F, 0x49, 0x07, 0x83, 0xA3, 0xC7, 0x79, 0x21, 0xB7, 0x33, 0xAD }, asf_read_unknown, 1 },
|
|
{ "Payload Extension System Encryption Sample ID", { 0x66, 0x98, 0xB8, 0x4E, 0x0A, 0xFA, 0x43, 0x30, 0xAE, 0xB2, 0x1C, 0x0A, 0x98, 0xD7, 0xA4, 0x4D }, asf_read_unknown, 1 },
|
|
{ "Payload Extension System Degradable JPEG", { 0x00, 0xE1, 0xAF, 0x06, 0x7B, 0xEC, 0x11, 0xD1, 0xA5, 0x82, 0x00, 0xC0, 0x4F, 0xC2, 0x9C, 0xFB }, asf_read_unknown, 1 },
|
|
};
|
|
|
|
#define READ_LEN(flag, name, len) \
|
|
do { \
|
|
if ((flag) == name ## IS_BYTE) \
|
|
len = avio_r8(pb); \
|
|
else if ((flag) == name ## IS_WORD) \
|
|
len = avio_rl16(pb); \
|
|
else if ((flag) == name ## IS_DWORD) \
|
|
len = avio_rl32(pb); \
|
|
else \
|
|
len = 0; \
|
|
} while(0)
|
|
|
|
static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint8_t sub_len;
|
|
int ret, i;
|
|
|
|
if (is_header) {
|
|
asf->dts_delta = avio_r8(pb);
|
|
if (asf->nb_mult_left) {
|
|
asf->mult_sub_len = avio_rl16(pb); // total
|
|
}
|
|
asf->sub_header_offset = avio_tell(pb);
|
|
asf->nb_sub = 0;
|
|
asf->sub_left = 1;
|
|
}
|
|
sub_len = avio_r8(pb);
|
|
if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
|
|
return ret;
|
|
for (i = 0; i < asf->nb_streams; i++) {
|
|
if (asf->stream_index == asf->asf_st[i]->stream_index) {
|
|
pkt->stream_index = asf->asf_st[i]->index;
|
|
break;
|
|
}
|
|
}
|
|
asf->return_subpayload = 1;
|
|
if (!sub_len)
|
|
asf->return_subpayload = 0;
|
|
|
|
if (sub_len)
|
|
asf->nb_sub++;
|
|
pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
|
|
if (asf->nb_mult_left && (avio_tell(pb) >=
|
|
(asf->sub_header_offset + asf->mult_sub_len))) {
|
|
asf->sub_left = 0;
|
|
asf->nb_mult_left--;
|
|
}
|
|
if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
|
|
asf->sub_left = 0;
|
|
if (!asf->nb_mult_left) {
|
|
avio_skip(pb, asf->pad_len);
|
|
if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
|
|
if (!asf->packet_size)
|
|
return AVERROR_INVALIDDATA;
|
|
av_log(s, AV_LOG_WARNING,
|
|
"Position %"PRId64" wrong, should be %"PRId64"\n",
|
|
avio_tell(pb), asf->packet_offset + asf->packet_size);
|
|
avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void reset_packet(ASFPacket *asf_pkt)
|
|
{
|
|
asf_pkt->size_left = 0;
|
|
asf_pkt->data_size = 0;
|
|
asf_pkt->duration = 0;
|
|
asf_pkt->flags = 0;
|
|
asf_pkt->dts = 0;
|
|
asf_pkt->duration = 0;
|
|
av_free_packet(&asf_pkt->avpkt);
|
|
av_init_packet(&asf_pkt->avpkt);
|
|
}
|
|
|
|
static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int ret;
|
|
|
|
if (!asf_pkt->data_size) {
|
|
asf_pkt->data_size = asf_pkt->size_left = avio_rl32(pb); // read media object size
|
|
if (asf_pkt->data_size <= 0)
|
|
return AVERROR_EOF;
|
|
if ((ret = av_new_packet(&asf_pkt->avpkt, asf_pkt->data_size)) < 0)
|
|
return ret;
|
|
} else
|
|
avio_skip(pb, 4); // reading of media object size is already done
|
|
asf_pkt->dts = avio_rl32(pb); // read presentation time
|
|
if (asf->rep_data_len && (asf->rep_data_len >= 8))
|
|
avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt,
|
|
ASFPacket *asf_pkt)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint16_t pay_len;
|
|
unsigned char *p;
|
|
int ret;
|
|
int skip = 0;
|
|
|
|
// if replicated lenght is 1, subpayloads are present
|
|
if (asf->rep_data_len == 1) {
|
|
asf->sub_left = 1;
|
|
asf->state = READ_MULTI_SUB;
|
|
pkt->flags = asf_pkt->flags;
|
|
if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
|
|
return ret;
|
|
} else {
|
|
if (asf->rep_data_len)
|
|
if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
|
|
return ret;
|
|
pay_len = avio_rl16(pb); // payload length should be WORD
|
|
if (pay_len > asf->packet_size) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Error: invalid data packet size, pay_len %"PRIu16", "
|
|
"asf->packet_size %"PRIu32", offset %"PRId64".\n",
|
|
pay_len, asf->packet_size, avio_tell(pb));
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
|
|
if (pay_len > asf_pkt->size_left) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Error: invalid buffer size, pay_len %d, data size left %d.\n",
|
|
pay_len, asf_pkt->size_left);
|
|
skip = pay_len - asf_pkt->size_left;
|
|
pay_len = asf_pkt->size_left;
|
|
}
|
|
if ((ret = avio_read(pb, p, pay_len)) < 0)
|
|
return ret;
|
|
if (s->key && s->keylen == 20)
|
|
ff_asfcrypt_dec(s->key, p, ret);
|
|
avio_skip(pb, skip);
|
|
asf_pkt->size_left -= pay_len;
|
|
asf->nb_mult_left--;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_single_payload(AVFormatContext *s, AVPacket *pkt,
|
|
ASFPacket *asf_pkt)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int64_t offset;
|
|
uint64_t size;
|
|
unsigned char *p;
|
|
int ret;
|
|
|
|
if (!asf_pkt->data_size) {
|
|
asf_pkt->data_size = asf_pkt->size_left = avio_rl32(pb); // read media object size
|
|
if (asf_pkt->data_size <= 0)
|
|
return AVERROR_EOF;
|
|
if ((ret = av_new_packet(&asf_pkt->avpkt, asf_pkt->data_size)) < 0)
|
|
return ret;
|
|
} else
|
|
avio_skip(pb, 4); // skip media object size
|
|
asf_pkt->dts = avio_rl32(pb); // read presentation time
|
|
if (asf->rep_data_len >= 8)
|
|
avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
|
|
offset = avio_tell(pb);
|
|
|
|
// size of the payload - size of the packet without header and padding
|
|
if (asf->packet_size_internal)
|
|
size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
|
|
else
|
|
size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
|
|
if (size > asf->packet_size) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Error: invalid data packet size, offset %"PRId64".\n",
|
|
avio_tell(pb));
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
|
|
if (size > asf_pkt->size_left)
|
|
return AVERROR_INVALIDDATA;
|
|
if (asf_pkt->size_left > size)
|
|
asf_pkt->size_left -= size;
|
|
else
|
|
asf_pkt->size_left = 0;
|
|
if ((ret = avio_read(pb, p, size)) < 0)
|
|
return ret;
|
|
if (s->key && s->keylen == 20)
|
|
ff_asfcrypt_dec(s->key, p, ret);
|
|
if (asf->packet_size_internal)
|
|
avio_skip(pb, asf->packet_size - asf->packet_size_internal);
|
|
avio_skip(pb, asf->pad_len); // skip padding
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int ret, i;
|
|
ASFPacket *asf_pkt = NULL;
|
|
|
|
if (!asf->sub_left) {
|
|
uint32_t off_len, media_len;
|
|
uint8_t stream_num;
|
|
|
|
stream_num = avio_r8(pb);
|
|
asf->stream_index = stream_num & ASF_STREAM_NUM;
|
|
for (i = 0; i < asf->nb_streams; i++) {
|
|
if (asf->stream_index == asf->asf_st[i]->stream_index) {
|
|
asf_pkt = &asf->asf_st[i]->pkt;
|
|
asf_pkt->stream_index = asf->asf_st[i]->index;
|
|
asf_pkt->dts = asf->dts;
|
|
break;
|
|
}
|
|
}
|
|
if (!asf_pkt)
|
|
return AVERROR_INVALIDDATA;
|
|
if (stream_num >> 7)
|
|
asf_pkt->flags |= AV_PKT_FLAG_KEY;
|
|
READ_LEN(asf->prop_flags & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE,
|
|
ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
|
|
READ_LEN(asf->prop_flags & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE,
|
|
ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
|
|
READ_LEN(asf->prop_flags & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE,
|
|
ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
|
|
if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
|
|
av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
|
|
reset_packet(asf_pkt);
|
|
}
|
|
asf_pkt->frame_num = media_len;
|
|
asf->sub_dts = off_len;
|
|
if (asf->nb_mult_left) {
|
|
if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
|
|
return ret;
|
|
} else if (asf->rep_data_len == 1) {
|
|
asf->sub_left = 1;
|
|
asf->state = READ_SINGLE;
|
|
pkt->flags = asf_pkt->flags;
|
|
if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
|
|
return ret;
|
|
} else {
|
|
if ((ret = asf_read_single_payload(s, pkt, asf_pkt)) < 0)
|
|
return ret;
|
|
}
|
|
} else {
|
|
for (i = 0; i <= asf->nb_streams; i++) {
|
|
if (asf->stream_index == asf->asf_st[i]->stream_index) {
|
|
asf_pkt = &asf->asf_st[i]->pkt;
|
|
break;
|
|
}
|
|
}
|
|
if (!asf_pkt)
|
|
return AVERROR_INVALIDDATA;
|
|
pkt->flags = asf_pkt->flags;
|
|
pkt->dts = asf_pkt->dts;
|
|
pkt->stream_index = asf->asf_st[i]->index;
|
|
if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_packet_header(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint64_t size;
|
|
uint32_t av_unused seq;
|
|
unsigned char error_flags, len_flags, pay_flags;
|
|
|
|
asf->packet_offset = avio_tell(pb);
|
|
error_flags = avio_r8(pb); // read Error Correction Flags
|
|
if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT)
|
|
if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
|
|
size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
|
|
avio_skip(pb, size);
|
|
}
|
|
len_flags = avio_r8(pb);
|
|
asf->prop_flags = avio_r8(pb);
|
|
READ_LEN(len_flags & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE,
|
|
ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
|
|
READ_LEN(len_flags & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE,
|
|
ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
|
|
READ_LEN(len_flags & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE,
|
|
ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
|
|
asf->send_time = avio_rl32(pb); // send time
|
|
avio_skip(pb, 2); // skip duration
|
|
if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
|
|
pay_flags = avio_r8(pb);
|
|
asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ASFStream *asf_st = asf->asf_st[st_num];
|
|
unsigned char *p = asf_pkt->avpkt.data;
|
|
uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
|
|
uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
|
|
int nchunks = pkt_len / chunk_len;
|
|
AVPacket pkt;
|
|
int pos = 0, j, l, ret;
|
|
|
|
|
|
if ((ret = av_new_packet(&pkt, asf_pkt->data_size)) < 0)
|
|
return ret;
|
|
|
|
while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
|
|
if (pos >= asf_pkt->data_size) {
|
|
break;
|
|
}
|
|
for (l = 0; l < pkt_len; l++) {
|
|
if (pos >= asf_pkt->data_size) {
|
|
break;
|
|
}
|
|
for (j = 0; j < asf_st->span; j++) {
|
|
if ((pos + chunk_len) >= asf_pkt->data_size)
|
|
break;
|
|
memcpy(pkt.data + pos,
|
|
p + (j * nchunks + l) * chunk_len,
|
|
chunk_len);
|
|
pos += chunk_len;
|
|
}
|
|
}
|
|
p += asf_st->span * pkt_len;
|
|
if (p > asf_pkt->avpkt.data + asf_pkt->data_size)
|
|
break;
|
|
}
|
|
av_free_packet(&asf_pkt->avpkt);
|
|
asf_pkt->avpkt = pkt;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int ret, i;
|
|
|
|
if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
|
|
!(asf->b_flags & ASF_FLAG_BROADCAST))
|
|
return AVERROR_EOF;
|
|
while (!pb->eof_reached) {
|
|
if (asf->state == PARSE_PACKET_HEADER) {
|
|
asf_read_packet_header(s);
|
|
if (!asf->nb_mult_left)
|
|
asf->state = READ_SINGLE;
|
|
else
|
|
asf->state = READ_MULTI;
|
|
}
|
|
if ((ret = asf_read_payload(s, pkt)) < 0)
|
|
return ret;
|
|
switch (asf->state) {
|
|
case READ_SINGLE:
|
|
if (!asf->sub_left)
|
|
asf->state = PARSE_PACKET_HEADER;
|
|
break;
|
|
case READ_MULTI_SUB:
|
|
if (!asf->sub_left && !asf->nb_mult_left) {
|
|
asf->state = PARSE_PACKET_HEADER;
|
|
if (!asf->return_subpayload)
|
|
avio_skip(pb, asf->pad_len); // skip padding
|
|
if (asf->packet_offset + asf->packet_size > avio_tell(pb))
|
|
avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
|
|
} else if (!asf->sub_left)
|
|
asf->state = READ_MULTI;
|
|
break;
|
|
case READ_MULTI:
|
|
if (!asf->nb_mult_left) {
|
|
asf->state = PARSE_PACKET_HEADER;
|
|
if (!asf->return_subpayload) {
|
|
avio_skip(pb, asf->pad_len); // skip padding
|
|
}
|
|
if (asf->packet_offset + asf->packet_size > avio_tell(pb))
|
|
avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
|
|
}
|
|
break;
|
|
}
|
|
if (asf->return_subpayload) {
|
|
asf->return_subpayload = 0;
|
|
return 0;
|
|
}
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
|
|
if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
|
|
if (asf->asf_st[i]->span > 1 &&
|
|
asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
|
|
if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
|
|
return ret;
|
|
av_packet_move_ref(pkt, &asf_pkt->avpkt);
|
|
pkt->stream_index = asf->asf_st[i]->index;
|
|
pkt->flags = asf_pkt->flags;
|
|
pkt->dts = asf_pkt->dts - asf->preroll;
|
|
asf_pkt->data_size = 0;
|
|
asf_pkt->frame_num = 0;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pb->eof_reached)
|
|
return AVERROR_EOF;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_close(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
int i;
|
|
|
|
for (i = 0; i < asf->nb_streams; i++) {
|
|
av_free_packet(&asf->asf_st[i]->pkt.avpkt);
|
|
av_freep(&asf->asf_st[i]);
|
|
av_dict_free(&asf->asf_sd[i].asf_met);
|
|
}
|
|
|
|
asf->nb_streams = 0;
|
|
return 0;
|
|
}
|
|
|
|
static void reset_packet_state(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
int i;
|
|
|
|
asf->state = PARSE_PACKET_HEADER;
|
|
asf->offset = 0;
|
|
asf->return_subpayload = 0;
|
|
asf->sub_left = 0;
|
|
asf->sub_header_offset = 0;
|
|
asf->packet_offset = asf->first_packet_offset;
|
|
asf->pad_len = 0;
|
|
asf->rep_data_len = 0;
|
|
asf->dts_delta = 0;
|
|
asf->mult_sub_len = 0;
|
|
asf->nb_mult_left = 0;
|
|
asf->nb_sub = 0;
|
|
asf->prop_flags = 0;
|
|
asf->sub_dts = 0;
|
|
asf->dts = 0;
|
|
for (i = 0; i < asf->nb_streams; i++) {
|
|
ASFPacket *pkt = &asf->asf_st[i]->pkt;
|
|
pkt->size_left = 0;
|
|
pkt->data_size = 0;
|
|
pkt->duration = 0;
|
|
pkt->flags = 0;
|
|
pkt->dts = 0;
|
|
pkt->duration = 0;
|
|
av_free_packet(&pkt->avpkt);
|
|
av_init_packet(&pkt->avpkt);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Find a timestamp for the requested position within the payload
|
|
* where the pos (position) is the offset inside the Data Object.
|
|
* When position is not on the packet boundary, asf_read_timestamp tries
|
|
* to find the closest packet offset after this position. If this packet
|
|
* is a key frame, this packet timestamp is read and an index entry is created
|
|
* for the packet. If this packet belongs to the requested stream,
|
|
* asf_read_timestamp upgrades pos to the packet beginning offset and
|
|
* returns this packet's dts. So returned dts is the dts of the first key frame with
|
|
* matching stream number after given position.
|
|
*/
|
|
static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
|
|
int64_t *pos, int64_t pos_limit)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
|
|
AVPacket pkt;
|
|
int n;
|
|
|
|
data_end = asf->data_offset + asf->data_size;
|
|
|
|
n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
|
|
asf->packet_size;
|
|
n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
|
|
pkt_pos = asf->first_packet_offset + n * asf->packet_size;
|
|
|
|
avio_seek(s->pb, pkt_pos, SEEK_SET);
|
|
pkt_offset = pkt_pos;
|
|
|
|
reset_packet_state(s);
|
|
while (avio_tell(s->pb) < data_end) {
|
|
|
|
int i, ret, st_found;
|
|
|
|
av_init_packet(&pkt);
|
|
pkt_offset = avio_tell(s->pb);
|
|
if ((ret = asf_read_packet(s, &pkt)) < 0) {
|
|
dts = AV_NOPTS_VALUE;
|
|
return ret;
|
|
}
|
|
// ASFPacket may contain fragments of packets belonging to different streams,
|
|
// pkt_offset is the offset of the first fragment within it.
|
|
if ((pkt_offset >= (pkt_pos + asf->packet_size)))
|
|
pkt_pos += asf->packet_size;
|
|
for (i = 0; i < asf->nb_streams; i++) {
|
|
ASFStream *st = asf->asf_st[i];
|
|
|
|
st_found = 0;
|
|
if (pkt.flags & AV_PKT_FLAG_KEY) {
|
|
dts = pkt.dts;
|
|
if (dts) {
|
|
av_add_index_entry(s->streams[pkt.stream_index], pkt_pos,
|
|
dts, pkt.size, 0, AVINDEX_KEYFRAME);
|
|
if (stream_index == st->index) {
|
|
st_found = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (st_found)
|
|
break;
|
|
av_free_packet(&pkt);
|
|
}
|
|
*pos = pkt_pos;
|
|
|
|
av_free_packet(&pkt);
|
|
return dts;
|
|
}
|
|
|
|
static int asf_read_seek(AVFormatContext *s, int stream_index,
|
|
int64_t timestamp, int flags)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
int idx, ret;
|
|
|
|
if (s->streams[stream_index]->nb_index_entries && asf->is_simple_index) {
|
|
idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags);
|
|
if (idx < 0 || idx >= s->streams[stream_index]->nb_index_entries)
|
|
return AVERROR_INVALIDDATA;
|
|
avio_seek(s->pb, s->streams[stream_index]->index_entries[idx].pos, SEEK_SET);
|
|
} else {
|
|
if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
|
|
return ret;
|
|
}
|
|
|
|
reset_packet_state(s);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const GUIDParseTable *find_guid(ff_asf_guid guid)
|
|
{
|
|
int j, ret;
|
|
const GUIDParseTable *g;
|
|
|
|
swap_guid(guid);
|
|
g = gdef;
|
|
for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
|
|
if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
|
|
return g;
|
|
g++;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
const GUIDParseTable *g = NULL;
|
|
ff_asf_guid guid;
|
|
int ret;
|
|
|
|
while (avio_tell(pb) <= offset + size) {
|
|
if (avio_tell(pb) == asf->offset)
|
|
break;
|
|
asf->offset = avio_tell(pb);
|
|
if ((ret = ff_get_guid(pb, &guid)) < 0)
|
|
return ret;
|
|
g = find_guid(guid);
|
|
if (g) {
|
|
if ((ret = g->read_object(s, g)) < 0)
|
|
return ret;
|
|
} else {
|
|
GUIDParseTable g2;
|
|
|
|
g2.name = "Unknown";
|
|
g2.is_subobject = 1;
|
|
asf_read_unknown(s, &g2);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_header(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
const GUIDParseTable *g = NULL;
|
|
ff_asf_guid guid;
|
|
int i, ret;
|
|
uint64_t size;
|
|
|
|
asf->preroll = 0;
|
|
asf->is_simple_index = 0;
|
|
ff_get_guid(pb, &guid);
|
|
if (ff_guidcmp(&guid, &ff_asf_header))
|
|
return AVERROR_INVALIDDATA;
|
|
avio_skip(pb, 8); // skip header object size
|
|
avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
|
|
asf->data_reached = 0;
|
|
|
|
/* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
|
|
* for the first time,
|
|
* Index object is processed and got eof and then seeking back to the Data is performed.
|
|
*/
|
|
while (1) {
|
|
// for the cases when object size is invalid
|
|
if (avio_tell(pb) == asf->offset)
|
|
break;
|
|
asf->offset = avio_tell(pb);
|
|
if ((ret = ff_get_guid(pb, &guid)) < 0) {
|
|
if (ret == AVERROR_EOF && asf->data_reached)
|
|
break;
|
|
else
|
|
goto failed;
|
|
}
|
|
g = find_guid(guid);
|
|
if (g) {
|
|
asf->unknown_offset = asf->offset;
|
|
asf->is_header = 1;
|
|
if ((ret = g->read_object(s, g)) < 0)
|
|
goto failed;
|
|
} else {
|
|
size = avio_rl64(pb);
|
|
align_position(pb, asf->offset, size);
|
|
}
|
|
if (asf->data_reached && !pb->seekable)
|
|
break;
|
|
}
|
|
|
|
if (!asf->data_reached) {
|
|
av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
|
|
ret = AVERROR_INVALIDDATA;
|
|
goto failed;
|
|
}
|
|
if (pb->seekable)
|
|
avio_seek(pb, asf->first_packet_offset, SEEK_SET);
|
|
|
|
for (i = 0; i < asf->nb_streams; i++) {
|
|
const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
|
|
AVStream *st = s->streams[asf->asf_st[i]->index];
|
|
set_language(s, rfc1766, &st->metadata);
|
|
}
|
|
|
|
for (i = 0; i < ASF_MAX_STREAMS; i++) {
|
|
AVStream *st = NULL;
|
|
|
|
st = find_stream(s, i);
|
|
if (st) {
|
|
av_dict_copy(&st->metadata, asf->asf_sd[i].asf_met, AV_DICT_IGNORE_SUFFIX);
|
|
if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
|
|
st->sample_aspect_ratio.num = asf->asf_sd[i].aspect_ratio.num;
|
|
st->sample_aspect_ratio.den = asf->asf_sd[i].aspect_ratio.den;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
failed:
|
|
asf_read_close(s);
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat ff_asf_o_demuxer = {
|
|
.name = "asf_o",
|
|
.long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
|
|
.priv_data_size = sizeof(ASFContext),
|
|
.read_probe = asf_probe,
|
|
.read_header = asf_read_header,
|
|
.read_packet = asf_read_packet,
|
|
.read_close = asf_read_close,
|
|
.read_timestamp = asf_read_timestamp,
|
|
.read_seek = asf_read_seek,
|
|
.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
|
|
};
|