mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-24 16:22:37 +00:00
1258 lines
37 KiB
C
1258 lines
37 KiB
C
/*
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* ASF compatible encoder and decoder.
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* Copyright (c) 2000, 2001 Fabrice Bellard.
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*
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* This library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "avformat.h"
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#include "avi.h"
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#include "mpegaudio.h"
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#define PACKET_SIZE 3200
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#define PACKET_HEADER_SIZE 12
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#define FRAME_HEADER_SIZE 17
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typedef struct {
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int num;
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int seq;
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/* use for reading */
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AVPacket pkt;
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int frag_offset;
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int timestamp;
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INT64 duration;
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int ds_span; /* descrambling */
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int ds_packet_size;
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int ds_chunk_size;
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int ds_data_size;
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int ds_silence_data;
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} ASFStream;
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typedef struct {
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UINT32 v1;
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UINT16 v2;
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UINT16 v3;
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UINT8 v4[8];
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} GUID;
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typedef struct __attribute__((packed)) {
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GUID guid; // generated by client computer
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uint64_t file_size; // in bytes
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// invalid if broadcasting
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uint64_t create_time; // time of creation, in 100-nanosecond units since 1.1.1601
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// invalid if broadcasting
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uint64_t packets_count; // how many packets are there in the file
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// invalid if broadcasting
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uint64_t play_time; // play time, in 100-nanosecond units
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// invalid if broadcasting
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uint64_t send_time; // time to send file, in 100-nanosecond units
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// invalid if broadcasting (could be ignored)
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uint32_t preroll; // timestamp of the first packet, in milliseconds
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// if nonzero - substract from time
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uint32_t ignore; // preroll is 64bit - but let's just ignore it
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uint32_t flags; // 0x01 - broadcast
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// 0x02 - seekable
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// rest is reserved should be 0
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uint32_t min_pktsize; // size of a data packet
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// invalid if broadcasting
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uint32_t max_pktsize; // shall be the same as for min_pktsize
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// invalid if broadcasting
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uint32_t max_bitrate; // bandwith of stream in bps
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// should be the sum of bitrates of the
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// individual media streams
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} ASFMainHeader;
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typedef struct {
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int seqno;
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int packet_size;
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int is_streamed;
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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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/* non streamed additonnal info */
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INT64 nb_packets;
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INT64 duration; /* in 100ns units */
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/* packet filling */
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int packet_size_left;
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int packet_timestamp_start;
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int packet_timestamp_end;
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int packet_nb_frames;
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UINT8 packet_buf[PACKET_SIZE];
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ByteIOContext pb;
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/* only for reading */
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uint64_t data_offset; /* begining of the first data packet */
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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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int packet_frag_offset;
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int packet_frag_size;
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int 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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int stream_index;
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ASFStream* asf_st; /* currently decoded stream */
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} ASFContext;
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static const GUID asf_header = {
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0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
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};
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static const GUID file_header = {
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0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
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};
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static const GUID stream_header = {
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0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
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};
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static const GUID audio_stream = {
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0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
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};
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static const GUID audio_conceal_none = {
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// 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
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// New value lifted from avifile
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0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
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};
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static const GUID video_stream = {
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0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
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};
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static const GUID video_conceal_none = {
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0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
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};
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static const GUID comment_header = {
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0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
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};
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static const GUID codec_comment_header = {
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0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
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};
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static const GUID codec_comment1_header = {
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0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
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};
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static const GUID data_header = {
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0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
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};
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static const GUID index_guid = {
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0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
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};
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static const GUID head1_guid = {
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0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
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};
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static const GUID head2_guid = {
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0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
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};
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/* I am not a number !!! This GUID is the one found on the PC used to
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generate the stream */
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static const GUID my_guid = {
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0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
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};
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static void put_guid(ByteIOContext *s, const GUID *g)
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{
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int i;
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put_le32(s, g->v1);
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put_le16(s, g->v2);
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put_le16(s, g->v3);
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for(i=0;i<8;i++)
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put_byte(s, g->v4[i]);
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}
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static void put_str16(ByteIOContext *s, const char *tag)
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{
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int c;
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put_le16(s,strlen(tag) + 1);
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for(;;) {
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c = (UINT8)*tag++;
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put_le16(s, c);
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if (c == '\0')
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break;
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}
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}
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static void put_str16_nolen(ByteIOContext *s, const char *tag)
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{
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int c;
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for(;;) {
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c = (UINT8)*tag++;
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put_le16(s, c);
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if (c == '\0')
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break;
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}
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}
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static INT64 put_header(ByteIOContext *pb, const GUID *g)
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{
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INT64 pos;
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pos = url_ftell(pb);
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put_guid(pb, g);
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put_le64(pb, 24);
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return pos;
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}
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/* update header size */
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static void end_header(ByteIOContext *pb, INT64 pos)
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{
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INT64 pos1;
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pos1 = url_ftell(pb);
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url_fseek(pb, pos + 16, SEEK_SET);
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put_le64(pb, pos1 - pos);
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url_fseek(pb, pos1, SEEK_SET);
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}
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/* write an asf chunk (only used in streaming case) */
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static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
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{
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ASFContext *asf = s->priv_data;
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ByteIOContext *pb = &s->pb;
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int length;
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length = payload_length + 8;
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put_le16(pb, type);
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put_le16(pb, length);
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put_le32(pb, asf->seqno);
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put_le16(pb, flags); /* unknown bytes */
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put_le16(pb, length);
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asf->seqno++;
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}
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/* convert from unix to windows time */
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static INT64 unix_to_file_time(int ti)
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{
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INT64 t;
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t = ti * INT64_C(10000000);
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t += INT64_C(116444736000000000);
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return t;
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}
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/* write the header (used two times if non streamed) */
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static int asf_write_header1(AVFormatContext *s, INT64 file_size, INT64 data_chunk_size)
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{
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ASFContext *asf = s->priv_data;
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ByteIOContext *pb = &s->pb;
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int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
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int has_title;
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AVCodecContext *enc;
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INT64 header_offset, cur_pos, hpos;
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int bit_rate;
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has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
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bit_rate = 0;
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for(n=0;n<s->nb_streams;n++) {
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enc = &s->streams[n]->codec;
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bit_rate += enc->bit_rate;
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}
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if (asf->is_streamed) {
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put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
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}
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put_guid(pb, &asf_header);
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put_le64(pb, -1); /* header length, will be patched after */
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put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
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put_byte(pb, 1); /* ??? */
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put_byte(pb, 2); /* ??? */
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/* file header */
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header_offset = url_ftell(pb);
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hpos = put_header(pb, &file_header);
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put_guid(pb, &my_guid);
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put_le64(pb, file_size);
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file_time = 0;
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put_le64(pb, unix_to_file_time(file_time));
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put_le64(pb, asf->nb_packets); /* number of packets */
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put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
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put_le64(pb, asf->duration); /* duration (in 100ns units) */
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put_le32(pb, 0); /* start time stamp */
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put_le32(pb, 0); /* ??? */
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put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
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put_le32(pb, asf->packet_size); /* packet size */
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put_le32(pb, asf->packet_size); /* packet size */
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put_le32(pb, bit_rate); /* Nominal data rate in bps */
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end_header(pb, hpos);
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/* unknown headers */
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hpos = put_header(pb, &head1_guid);
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put_guid(pb, &head2_guid);
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put_le32(pb, 6);
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put_le16(pb, 0);
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end_header(pb, hpos);
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/* title and other infos */
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if (has_title) {
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hpos = put_header(pb, &comment_header);
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put_le16(pb, 2 * (strlen(s->title) + 1));
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put_le16(pb, 2 * (strlen(s->author) + 1));
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put_le16(pb, 2 * (strlen(s->copyright) + 1));
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put_le16(pb, 2 * (strlen(s->comment) + 1));
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put_le16(pb, 0);
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put_str16_nolen(pb, s->title);
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put_str16_nolen(pb, s->author);
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put_str16_nolen(pb, s->copyright);
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put_str16_nolen(pb, s->comment);
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end_header(pb, hpos);
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}
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/* stream headers */
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for(n=0;n<s->nb_streams;n++) {
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INT64 es_pos;
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// ASFStream *stream = &asf->streams[n];
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enc = &s->streams[n]->codec;
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asf->streams[n].num = n + 1;
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asf->streams[n].seq = 0;
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switch(enc->codec_type) {
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case CODEC_TYPE_AUDIO:
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wav_extra_size = 0;
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extra_size = 18 + wav_extra_size;
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extra_size2 = 0;
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break;
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default:
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case CODEC_TYPE_VIDEO:
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wav_extra_size = 0;
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extra_size = 0x33;
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extra_size2 = 0;
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break;
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}
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hpos = put_header(pb, &stream_header);
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if (enc->codec_type == CODEC_TYPE_AUDIO) {
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put_guid(pb, &audio_stream);
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put_guid(pb, &audio_conceal_none);
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} else {
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put_guid(pb, &video_stream);
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put_guid(pb, &video_conceal_none);
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}
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put_le64(pb, 0); /* ??? */
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es_pos = url_ftell(pb);
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put_le32(pb, extra_size); /* wav header len */
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put_le32(pb, extra_size2); /* additional data len */
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put_le16(pb, n + 1); /* stream number */
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put_le32(pb, 0); /* ??? */
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if (enc->codec_type == CODEC_TYPE_AUDIO) {
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/* WAVEFORMATEX header */
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int wavsize = put_wav_header(pb, enc);
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if (wavsize < 0)
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return -1;
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if (wavsize != extra_size) {
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cur_pos = url_ftell(pb);
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url_fseek(pb, es_pos, SEEK_SET);
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put_le32(pb, wavsize); /* wav header len */
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url_fseek(pb, cur_pos, SEEK_SET);
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}
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} else {
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put_le32(pb, enc->width);
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put_le32(pb, enc->height);
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put_byte(pb, 2); /* ??? */
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put_le16(pb, 40); /* size */
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/* BITMAPINFOHEADER header */
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put_bmp_header(pb, enc, codec_bmp_tags, 1);
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}
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end_header(pb, hpos);
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}
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/* media comments */
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hpos = put_header(pb, &codec_comment_header);
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put_guid(pb, &codec_comment1_header);
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put_le32(pb, s->nb_streams);
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for(n=0;n<s->nb_streams;n++) {
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AVCodec *p;
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enc = &s->streams[n]->codec;
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p = avcodec_find_encoder(enc->codec_id);
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put_le16(pb, asf->streams[n].num);
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put_str16(pb, p ? p->name : enc->codec_name);
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put_le16(pb, 0); /* no parameters */
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/* id */
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if (enc->codec_type == CODEC_TYPE_AUDIO) {
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put_le16(pb, 2);
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put_le16(pb, codec_get_tag(codec_wav_tags, enc->codec_id));
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} else {
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put_le16(pb, 4);
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put_le32(pb, codec_get_tag(codec_bmp_tags, enc->codec_id));
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}
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}
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end_header(pb, hpos);
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/* patch the header size fields */
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cur_pos = url_ftell(pb);
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header_size = cur_pos - header_offset;
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if (asf->is_streamed) {
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header_size += 8 + 30 + 50;
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url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
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put_le16(pb, header_size);
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url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
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put_le16(pb, header_size);
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header_size -= 8 + 30 + 50;
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}
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header_size += 24 + 6;
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url_fseek(pb, header_offset - 14, SEEK_SET);
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put_le64(pb, header_size);
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url_fseek(pb, cur_pos, SEEK_SET);
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/* movie chunk, followed by packets of packet_size */
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asf->data_offset = cur_pos;
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put_guid(pb, &data_header);
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put_le64(pb, data_chunk_size);
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put_guid(pb, &my_guid);
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put_le64(pb, asf->nb_packets); /* nb packets */
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put_byte(pb, 1); /* ??? */
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put_byte(pb, 1); /* ??? */
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return 0;
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}
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static int asf_write_header(AVFormatContext *s)
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{
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ASFContext *asf = s->priv_data;
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av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
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asf->packet_size = PACKET_SIZE;
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asf->nb_packets = 0;
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if (asf_write_header1(s, 0, 50) < 0) {
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//av_free(asf);
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return -1;
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}
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put_flush_packet(&s->pb);
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|
|
asf->packet_nb_frames = 0;
|
|
asf->packet_timestamp_start = -1;
|
|
asf->packet_timestamp_end = -1;
|
|
asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
|
|
init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
|
|
NULL, NULL, NULL, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int asf_write_stream_header(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
|
|
asf->is_streamed = 1;
|
|
|
|
return asf_write_header(s);
|
|
}
|
|
|
|
/* write a fixed size packet */
|
|
static int put_packet(AVFormatContext *s,
|
|
unsigned int timestamp, unsigned int duration,
|
|
int nb_frames, int padsize)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ByteIOContext *pb = &s->pb;
|
|
int flags;
|
|
|
|
if (asf->is_streamed) {
|
|
put_chunk(s, 0x4424, asf->packet_size, 0);
|
|
}
|
|
|
|
put_byte(pb, 0x82);
|
|
put_le16(pb, 0);
|
|
|
|
flags = 0x01; /* nb segments present */
|
|
if (padsize > 0) {
|
|
if (padsize < 256)
|
|
flags |= 0x08;
|
|
else
|
|
flags |= 0x10;
|
|
}
|
|
put_byte(pb, flags); /* flags */
|
|
put_byte(pb, 0x5d);
|
|
if (flags & 0x10)
|
|
put_le16(pb, padsize - 2);
|
|
if (flags & 0x08)
|
|
put_byte(pb, padsize - 1);
|
|
put_le32(pb, timestamp);
|
|
put_le16(pb, duration);
|
|
put_byte(pb, nb_frames | 0x80);
|
|
|
|
return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
|
|
}
|
|
|
|
static void flush_packet(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
int hdr_size, ptr;
|
|
|
|
hdr_size = put_packet(s, asf->packet_timestamp_start,
|
|
asf->packet_timestamp_end - asf->packet_timestamp_start,
|
|
asf->packet_nb_frames, asf->packet_size_left);
|
|
|
|
/* Clear out the padding bytes */
|
|
ptr = asf->packet_size - hdr_size - asf->packet_size_left;
|
|
memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
|
|
|
|
put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
|
|
|
|
put_flush_packet(&s->pb);
|
|
asf->nb_packets++;
|
|
asf->packet_nb_frames = 0;
|
|
asf->packet_timestamp_start = -1;
|
|
asf->packet_timestamp_end = -1;
|
|
asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
|
|
init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
|
|
NULL, NULL, NULL, NULL);
|
|
}
|
|
|
|
static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestamp,
|
|
int payload_size, int frag_offset, int frag_len)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ByteIOContext *pb = &asf->pb;
|
|
int val;
|
|
|
|
val = stream->num;
|
|
if (s->streams[val - 1]->codec.coded_frame->key_frame /* && frag_offset == 0 */)
|
|
val |= 0x80;
|
|
put_byte(pb, val);
|
|
put_byte(pb, stream->seq);
|
|
put_le32(pb, frag_offset); /* fragment offset */
|
|
put_byte(pb, 0x08); /* flags */
|
|
put_le32(pb, payload_size);
|
|
put_le32(pb, timestamp);
|
|
put_le16(pb, frag_len);
|
|
}
|
|
|
|
|
|
/* Output a frame. We suppose that payload_size <= PACKET_SIZE.
|
|
|
|
It is there that you understand that the ASF format is really
|
|
crap. They have misread the MPEG Systems spec !
|
|
*/
|
|
static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
|
|
UINT8 *buf, int payload_size)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
int frag_pos, frag_len, frag_len1;
|
|
|
|
frag_pos = 0;
|
|
while (frag_pos < payload_size) {
|
|
frag_len = payload_size - frag_pos;
|
|
frag_len1 = asf->packet_size_left - FRAME_HEADER_SIZE;
|
|
if (frag_len1 > 0) {
|
|
if (frag_len > frag_len1)
|
|
frag_len = frag_len1;
|
|
put_frame_header(s, stream, timestamp+1, payload_size, frag_pos, frag_len);
|
|
put_buffer(&asf->pb, buf, frag_len);
|
|
asf->packet_size_left -= (frag_len + FRAME_HEADER_SIZE);
|
|
asf->packet_timestamp_end = timestamp;
|
|
if (asf->packet_timestamp_start == -1)
|
|
asf->packet_timestamp_start = timestamp;
|
|
asf->packet_nb_frames++;
|
|
} else {
|
|
frag_len = 0;
|
|
}
|
|
frag_pos += frag_len;
|
|
buf += frag_len;
|
|
/* output the frame if filled */
|
|
if (asf->packet_size_left <= FRAME_HEADER_SIZE)
|
|
flush_packet(s);
|
|
}
|
|
stream->seq++;
|
|
}
|
|
|
|
|
|
static int asf_write_packet(AVFormatContext *s, int stream_index,
|
|
UINT8 *buf, int size, int timestamp)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ASFStream *stream;
|
|
INT64 duration;
|
|
AVCodecContext *codec;
|
|
|
|
codec = &s->streams[stream_index]->codec;
|
|
stream = &asf->streams[stream_index];
|
|
|
|
if (codec->codec_type == CODEC_TYPE_AUDIO) {
|
|
duration = (codec->frame_number * codec->frame_size * INT64_C(10000000)) /
|
|
codec->sample_rate;
|
|
} else {
|
|
duration = codec->frame_number *
|
|
((INT64_C(10000000) * FRAME_RATE_BASE) / codec->frame_rate);
|
|
}
|
|
if (duration > asf->duration)
|
|
asf->duration = duration;
|
|
|
|
put_frame(s, stream, timestamp, buf, size);
|
|
return 0;
|
|
}
|
|
|
|
static int asf_write_trailer(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
INT64 file_size;
|
|
|
|
/* flush the current packet */
|
|
if (asf->pb.buf_ptr > asf->pb.buffer)
|
|
flush_packet(s);
|
|
|
|
if (asf->is_streamed) {
|
|
put_chunk(s, 0x4524, 0, 0); /* end of stream */
|
|
} else {
|
|
/* rewrite an updated header */
|
|
file_size = url_ftell(&s->pb);
|
|
url_fseek(&s->pb, 0, SEEK_SET);
|
|
asf_write_header1(s, file_size, file_size - asf->data_offset);
|
|
}
|
|
|
|
put_flush_packet(&s->pb);
|
|
return 0;
|
|
}
|
|
|
|
/**********************************/
|
|
/* decoding */
|
|
|
|
//#define DEBUG
|
|
|
|
#ifdef DEBUG
|
|
static void print_guid(const GUID *g)
|
|
{
|
|
int i;
|
|
printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
|
|
for(i=0;i<8;i++)
|
|
printf(" 0x%02x,", g->v4[i]);
|
|
printf("}\n");
|
|
}
|
|
#endif
|
|
|
|
static void get_guid(ByteIOContext *s, GUID *g)
|
|
{
|
|
int i;
|
|
|
|
g->v1 = get_le32(s);
|
|
g->v2 = get_le16(s);
|
|
g->v3 = get_le16(s);
|
|
for(i=0;i<8;i++)
|
|
g->v4[i] = get_byte(s);
|
|
}
|
|
|
|
#if 0
|
|
static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
|
|
{
|
|
int len, c;
|
|
char *q;
|
|
|
|
len = get_le16(pb);
|
|
q = buf;
|
|
while (len > 0) {
|
|
c = get_le16(pb);
|
|
if ((q - buf) < buf_size - 1)
|
|
*q++ = c;
|
|
len--;
|
|
}
|
|
*q = '\0';
|
|
}
|
|
#endif
|
|
|
|
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
|
|
{
|
|
int c;
|
|
char *q;
|
|
|
|
q = buf;
|
|
while (len > 0) {
|
|
c = get_le16(pb);
|
|
if ((q - buf) < buf_size - 1)
|
|
*q++ = c;
|
|
len-=2;
|
|
}
|
|
*q = '\0';
|
|
}
|
|
|
|
static int asf_probe(AVProbeData *pd)
|
|
{
|
|
GUID g;
|
|
const unsigned char *p;
|
|
int i;
|
|
|
|
/* check file header */
|
|
if (pd->buf_size <= 32)
|
|
return 0;
|
|
p = pd->buf;
|
|
g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
|
|
p += 4;
|
|
g.v2 = p[0] | (p[1] << 8);
|
|
p += 2;
|
|
g.v3 = p[0] | (p[1] << 8);
|
|
p += 2;
|
|
for(i=0;i<8;i++)
|
|
g.v4[i] = *p++;
|
|
|
|
if (!memcmp(&g, &asf_header, sizeof(GUID)))
|
|
return AVPROBE_SCORE_MAX;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
GUID g;
|
|
ByteIOContext *pb = &s->pb;
|
|
AVStream *st;
|
|
ASFStream *asf_st;
|
|
int size, i;
|
|
INT64 gsize;
|
|
|
|
av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
|
|
|
|
get_guid(pb, &g);
|
|
if (memcmp(&g, &asf_header, sizeof(GUID)))
|
|
goto fail;
|
|
get_le64(pb);
|
|
get_le32(pb);
|
|
get_byte(pb);
|
|
get_byte(pb);
|
|
memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
|
|
for(;;) {
|
|
get_guid(pb, &g);
|
|
gsize = get_le64(pb);
|
|
#ifdef DEBUG
|
|
printf("%08Lx: ", url_ftell(pb) - 24);
|
|
print_guid(&g);
|
|
printf(" size=0x%Lx\n", gsize);
|
|
#endif
|
|
if (gsize < 24)
|
|
goto fail;
|
|
if (!memcmp(&g, &file_header, sizeof(GUID))) {
|
|
get_guid(pb, &asf->hdr.guid);
|
|
asf->hdr.file_size = get_le64(pb);
|
|
asf->hdr.create_time = get_le64(pb);
|
|
asf->hdr.packets_count = get_le64(pb);
|
|
asf->hdr.play_time = get_le64(pb);
|
|
asf->hdr.send_time = get_le64(pb);
|
|
asf->hdr.preroll = get_le32(pb);
|
|
asf->hdr.ignore = get_le32(pb);
|
|
asf->hdr.flags = get_le32(pb);
|
|
asf->hdr.min_pktsize = get_le32(pb);
|
|
asf->hdr.max_pktsize = get_le32(pb);
|
|
asf->hdr.max_bitrate = get_le32(pb);
|
|
asf->packet_size = asf->hdr.max_pktsize;
|
|
asf->nb_packets = asf->hdr.packets_count;
|
|
} else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
|
|
int type, total_size;
|
|
unsigned int tag1;
|
|
INT64 pos1, pos2;
|
|
|
|
pos1 = url_ftell(pb);
|
|
|
|
st = av_mallocz(sizeof(AVStream));
|
|
if (!st)
|
|
goto fail;
|
|
avcodec_get_context_defaults(&st->codec);
|
|
s->streams[s->nb_streams] = st;
|
|
asf_st = av_mallocz(sizeof(ASFStream));
|
|
if (!asf_st)
|
|
goto fail;
|
|
st->priv_data = asf_st;
|
|
st->time_length = (asf->hdr.send_time - asf->hdr.preroll) / 10; // us
|
|
get_guid(pb, &g);
|
|
if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
|
|
type = CODEC_TYPE_AUDIO;
|
|
} else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
|
|
type = CODEC_TYPE_VIDEO;
|
|
} else {
|
|
goto fail;
|
|
}
|
|
get_guid(pb, &g);
|
|
total_size = get_le64(pb);
|
|
get_le32(pb);
|
|
get_le32(pb);
|
|
st->id = get_le16(pb) & 0x7f; /* stream id */
|
|
// mapping of asf ID to AV stream ID;
|
|
asf->asfid2avid[st->id] = s->nb_streams++;
|
|
|
|
get_le32(pb);
|
|
st->codec.codec_type = type;
|
|
st->codec.frame_rate = 15 * s->pts_den / s->pts_num; // 15 fps default
|
|
if (type == CODEC_TYPE_AUDIO) {
|
|
get_wav_header(pb, &st->codec, 1);
|
|
/* We have to init the frame size at some point .... */
|
|
pos2 = url_ftell(pb);
|
|
if (gsize > (pos2 + 8 - pos1 + 24)) {
|
|
asf_st->ds_span = get_byte(pb);
|
|
asf_st->ds_packet_size = get_le16(pb);
|
|
asf_st->ds_chunk_size = get_le16(pb);
|
|
asf_st->ds_data_size = get_le16(pb);
|
|
asf_st->ds_silence_data = get_byte(pb);
|
|
}
|
|
//printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
|
|
// asf_st->ds_packet_size, asf_st->ds_chunk_size,
|
|
// asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
|
|
if (asf_st->ds_span > 1) {
|
|
if (!asf_st->ds_chunk_size
|
|
|| (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
|
|
asf_st->ds_span = 0; // disable descrambling
|
|
}
|
|
switch (st->codec.codec_id) {
|
|
case CODEC_ID_MP3LAME:
|
|
st->codec.frame_size = MPA_FRAME_SIZE;
|
|
break;
|
|
case CODEC_ID_PCM_S16LE:
|
|
case CODEC_ID_PCM_S16BE:
|
|
case CODEC_ID_PCM_U16LE:
|
|
case CODEC_ID_PCM_U16BE:
|
|
case CODEC_ID_PCM_S8:
|
|
case CODEC_ID_PCM_U8:
|
|
case CODEC_ID_PCM_ALAW:
|
|
case CODEC_ID_PCM_MULAW:
|
|
st->codec.frame_size = 1;
|
|
break;
|
|
default:
|
|
/* This is probably wrong, but it prevents a crash later */
|
|
st->codec.frame_size = 1;
|
|
break;
|
|
}
|
|
} else {
|
|
get_le32(pb);
|
|
get_le32(pb);
|
|
get_byte(pb);
|
|
size = get_le16(pb); /* size */
|
|
get_le32(pb); /* size */
|
|
st->codec.width = get_le32(pb);
|
|
st->codec.height = get_le32(pb);
|
|
/* not available for asf */
|
|
get_le16(pb); /* panes */
|
|
get_le16(pb); /* depth */
|
|
tag1 = get_le32(pb);
|
|
url_fskip(pb, 20);
|
|
if (size > 40) {
|
|
st->codec.extradata_size = size - 40;
|
|
st->codec.extradata = av_mallocz(st->codec.extradata_size);
|
|
get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
|
|
}
|
|
st->codec.codec_tag = st->codec.fourcc = tag1;
|
|
st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
|
|
}
|
|
pos2 = url_ftell(pb);
|
|
url_fskip(pb, gsize - (pos2 - pos1 + 24));
|
|
} else if (!memcmp(&g, &data_header, sizeof(GUID))) {
|
|
break;
|
|
} else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
|
|
int len1, len2, len3, len4, len5;
|
|
|
|
len1 = get_le16(pb);
|
|
len2 = get_le16(pb);
|
|
len3 = get_le16(pb);
|
|
len4 = get_le16(pb);
|
|
len5 = get_le16(pb);
|
|
get_str16_nolen(pb, len1, s->title, sizeof(s->title));
|
|
get_str16_nolen(pb, len2, s->author, sizeof(s->author));
|
|
get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
|
|
get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
|
|
url_fskip(pb, len5);
|
|
#if 0
|
|
} else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
|
|
int v1, v2;
|
|
get_guid(pb, &g);
|
|
v1 = get_le32(pb);
|
|
v2 = get_le16(pb);
|
|
} else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
|
|
int len, v1, n, num;
|
|
char str[256], *q;
|
|
char tag[16];
|
|
|
|
get_guid(pb, &g);
|
|
print_guid(&g);
|
|
|
|
n = get_le32(pb);
|
|
for(i=0;i<n;i++) {
|
|
num = get_le16(pb); /* stream number */
|
|
get_str16(pb, str, sizeof(str));
|
|
get_str16(pb, str, sizeof(str));
|
|
len = get_le16(pb);
|
|
q = tag;
|
|
while (len > 0) {
|
|
v1 = get_byte(pb);
|
|
if ((q - tag) < sizeof(tag) - 1)
|
|
*q++ = v1;
|
|
len--;
|
|
}
|
|
*q = '\0';
|
|
}
|
|
#endif
|
|
} else if (url_feof(pb)) {
|
|
goto fail;
|
|
} else {
|
|
url_fseek(pb, gsize - 24, SEEK_CUR);
|
|
}
|
|
}
|
|
get_guid(pb, &g);
|
|
get_le64(pb);
|
|
get_byte(pb);
|
|
get_byte(pb);
|
|
if (url_feof(pb))
|
|
goto fail;
|
|
asf->data_offset = url_ftell(pb);
|
|
asf->packet_size_left = 0;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
AVStream *st = s->streams[i];
|
|
if (st) {
|
|
av_free(st->priv_data);
|
|
av_free(st->codec.extradata);
|
|
}
|
|
av_free(st);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
#define DO_2BITS(bits, var, defval) \
|
|
switch (bits & 3) \
|
|
{ \
|
|
case 3: var = get_le32(pb); rsize += 4; break; \
|
|
case 2: var = get_le16(pb); rsize += 2; break; \
|
|
case 1: var = get_byte(pb); rsize++; break; \
|
|
default: var = defval; break; \
|
|
}
|
|
|
|
static int asf_get_packet(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ByteIOContext *pb = &s->pb;
|
|
uint32_t packet_length, padsize;
|
|
int rsize = 11;
|
|
int c = get_byte(pb);
|
|
if (c != 0x82) {
|
|
if (!url_feof(pb))
|
|
printf("ff asf bad header %x at:%Ld\n", c, url_ftell(pb));
|
|
return -EIO;
|
|
}
|
|
if ((c & 0x0f) == 2) { // always true for now
|
|
if (get_le16(pb) != 0) {
|
|
if (!url_feof(pb))
|
|
printf("ff asf bad non zero\n");
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
asf->packet_flags = get_byte(pb);
|
|
asf->packet_property = get_byte(pb);
|
|
|
|
DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
|
|
DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
|
|
DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
|
|
|
|
asf->packet_timestamp = get_le32(pb);
|
|
get_le16(pb); /* duration */
|
|
// rsize has at least 11 bytes which have to be present
|
|
|
|
if (asf->packet_flags & 0x01) {
|
|
asf->packet_segsizetype = get_byte(pb); rsize++;
|
|
asf->packet_segments = asf->packet_segsizetype & 0x3f;
|
|
} else {
|
|
asf->packet_segments = 1;
|
|
asf->packet_segsizetype = 0x80;
|
|
}
|
|
asf->packet_size_left = packet_length - padsize - rsize;
|
|
if (packet_length < asf->hdr.min_pktsize)
|
|
padsize += asf->hdr.min_pktsize - packet_length;
|
|
asf->packet_padsize = padsize;
|
|
#ifdef DEBUG
|
|
printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ASFStream *asf_st = 0;
|
|
ByteIOContext *pb = &s->pb;
|
|
//static int pc = 0;
|
|
for (;;) {
|
|
int rsize = 0;
|
|
if (asf->packet_size_left < FRAME_HEADER_SIZE
|
|
|| asf->packet_segments < 1) {
|
|
//asf->packet_size_left <= asf->packet_padsize) {
|
|
int ret = asf->packet_size_left + asf->packet_padsize;
|
|
//printf("PacketLeftSize:%d Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
|
|
/* fail safe */
|
|
url_fskip(pb, ret);
|
|
ret = asf_get_packet(s);
|
|
//printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
|
|
if (ret < 0 || url_feof(pb))
|
|
return -EIO;
|
|
asf->packet_time_start = 0;
|
|
continue;
|
|
}
|
|
if (asf->packet_time_start == 0) {
|
|
/* read frame header */
|
|
int num = get_byte(pb);
|
|
asf->packet_segments--;
|
|
rsize++;
|
|
asf->packet_key_frame = (num & 0x80) >> 7;
|
|
asf->stream_index = asf->asfid2avid[num & 0x7f];
|
|
// sequence should be ignored!
|
|
DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
|
|
DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
|
|
DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
|
|
|
|
if (asf->packet_replic_size > 1) {
|
|
// it should be always at least 8 bytes - FIXME validate
|
|
asf->packet_obj_size = get_le32(pb);
|
|
asf->packet_frag_timestamp = get_le32(pb); // timestamp
|
|
if (asf->packet_replic_size > 8)
|
|
url_fskip(pb, asf->packet_replic_size - 8);
|
|
rsize += asf->packet_replic_size; // FIXME - check validity
|
|
} else {
|
|
// multipacket - frag_offset is begining timestamp
|
|
asf->packet_time_start = asf->packet_frag_offset;
|
|
asf->packet_frag_offset = 0;
|
|
asf->packet_frag_timestamp = asf->packet_timestamp;
|
|
|
|
if (asf->packet_replic_size == 1) {
|
|
asf->packet_time_delta = get_byte(pb);
|
|
rsize++;
|
|
}
|
|
}
|
|
if (asf->packet_flags & 0x01) {
|
|
DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
|
|
#undef DO_2BITS
|
|
//printf("Fragsize %d\n", asf->packet_frag_size);
|
|
} else {
|
|
asf->packet_frag_size = asf->packet_size_left - rsize;
|
|
//printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
|
|
}
|
|
if (asf->packet_replic_size == 1) {
|
|
asf->packet_multi_size = asf->packet_frag_size;
|
|
if (asf->packet_multi_size > asf->packet_size_left) {
|
|
asf->packet_segments = 0;
|
|
continue;
|
|
}
|
|
}
|
|
asf->packet_size_left -= rsize;
|
|
//printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
|
|
|
|
if (asf->stream_index < 0) {
|
|
asf->packet_time_start = 0;
|
|
/* unhandled packet (should not happen) */
|
|
url_fskip(pb, asf->packet_frag_size);
|
|
asf->packet_size_left -= asf->packet_frag_size;
|
|
printf("ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
|
|
continue;
|
|
}
|
|
asf->asf_st = s->streams[asf->stream_index]->priv_data;
|
|
}
|
|
asf_st = asf->asf_st;
|
|
|
|
if ((asf->packet_frag_offset != asf_st->frag_offset
|
|
|| (asf->packet_frag_offset
|
|
&& asf->packet_seq != asf_st->seq)) // seq should be ignored
|
|
) {
|
|
/* cannot continue current packet: free it */
|
|
// FIXME better check if packet was already allocated
|
|
printf("ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
|
|
asf_st->pkt.size,
|
|
asf->packet_obj_size,
|
|
asf->packet_frag_offset, asf_st->frag_offset,
|
|
asf->packet_seq, asf_st->seq, asf->packet_frag_size);
|
|
if (asf_st->pkt.size)
|
|
av_free_packet(&asf_st->pkt);
|
|
asf_st->frag_offset = 0;
|
|
if (asf->packet_frag_offset != 0) {
|
|
url_fskip(pb, asf->packet_frag_size);
|
|
printf("ff asf parser skiping %db\n", asf->packet_frag_size);
|
|
asf->packet_size_left -= asf->packet_frag_size;
|
|
continue;
|
|
}
|
|
}
|
|
if (asf->packet_replic_size == 1) {
|
|
// frag_offset is here used as the begining timestamp
|
|
asf->packet_frag_timestamp = asf->packet_time_start;
|
|
asf->packet_time_start += asf->packet_time_delta;
|
|
asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
|
|
asf->packet_size_left--;
|
|
asf->packet_multi_size--;
|
|
if (asf->packet_multi_size < asf->packet_obj_size)
|
|
{
|
|
asf->packet_time_start = 0;
|
|
url_fskip(pb, asf->packet_multi_size);
|
|
asf->packet_size_left -= asf->packet_multi_size;
|
|
continue;
|
|
}
|
|
asf->packet_multi_size -= asf->packet_obj_size;
|
|
//printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
|
|
}
|
|
if (asf_st->frag_offset == 0) {
|
|
/* new packet */
|
|
av_new_packet(&asf_st->pkt, asf->packet_obj_size);
|
|
asf_st->seq = asf->packet_seq;
|
|
asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
|
|
asf_st->pkt.stream_index = asf->stream_index;
|
|
if (asf->packet_key_frame)
|
|
asf_st->pkt.flags |= PKT_FLAG_KEY;
|
|
}
|
|
|
|
/* read data */
|
|
//printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
|
|
// asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
|
|
// asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
|
|
asf->packet_size_left -= asf->packet_frag_size;
|
|
if (asf->packet_size_left < 0)
|
|
continue;
|
|
get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
|
|
asf->packet_frag_size);
|
|
asf_st->frag_offset += asf->packet_frag_size;
|
|
/* test if whole packet is read */
|
|
if (asf_st->frag_offset == asf_st->pkt.size) {
|
|
/* return packet */
|
|
if (asf_st->ds_span > 1) {
|
|
/* packet descrambling */
|
|
char* newdata = av_malloc(asf_st->pkt.size);
|
|
if (newdata) {
|
|
int offset = 0;
|
|
while (offset < asf_st->pkt.size) {
|
|
int off = offset / asf_st->ds_chunk_size;
|
|
int row = off / asf_st->ds_span;
|
|
int col = off % asf_st->ds_span;
|
|
int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
|
|
//printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
|
|
memcpy(newdata + offset,
|
|
asf_st->pkt.data + idx * asf_st->ds_chunk_size,
|
|
asf_st->ds_chunk_size);
|
|
offset += asf_st->ds_chunk_size;
|
|
}
|
|
av_free(asf_st->pkt.data);
|
|
asf_st->pkt.data = newdata;
|
|
}
|
|
}
|
|
asf_st->frag_offset = 0;
|
|
memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
|
|
//printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
|
|
asf_st->pkt.size = 0;
|
|
asf_st->pkt.data = 0;
|
|
break; // packet completed
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_close(AVFormatContext *s)
|
|
{
|
|
int i;
|
|
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
AVStream *st = s->streams[i];
|
|
av_free(st->priv_data);
|
|
av_free(st->codec.extradata);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int asf_read_seek(AVFormatContext *s, int64_t pts)
|
|
{
|
|
printf("SEEK TO %Ld", pts);
|
|
return -1;
|
|
}
|
|
|
|
static AVInputFormat asf_iformat = {
|
|
"asf",
|
|
"asf format",
|
|
sizeof(ASFContext),
|
|
asf_probe,
|
|
asf_read_header,
|
|
asf_read_packet,
|
|
asf_read_close,
|
|
asf_read_seek,
|
|
};
|
|
|
|
static AVOutputFormat asf_oformat = {
|
|
"asf",
|
|
"asf format",
|
|
"application/octet-stream",
|
|
"asf,wmv",
|
|
sizeof(ASFContext),
|
|
#ifdef CONFIG_MP3LAME
|
|
CODEC_ID_MP3LAME,
|
|
#else
|
|
CODEC_ID_MP2,
|
|
#endif
|
|
CODEC_ID_MSMPEG4V3,
|
|
asf_write_header,
|
|
asf_write_packet,
|
|
asf_write_trailer,
|
|
};
|
|
|
|
static AVOutputFormat asf_stream_oformat = {
|
|
"asf_stream",
|
|
"asf format",
|
|
"application/octet-stream",
|
|
"asf,wmv",
|
|
sizeof(ASFContext),
|
|
#ifdef CONFIG_MP3LAME
|
|
CODEC_ID_MP3LAME,
|
|
#else
|
|
CODEC_ID_MP2,
|
|
#endif
|
|
CODEC_ID_MSMPEG4V3,
|
|
asf_write_stream_header,
|
|
asf_write_packet,
|
|
asf_write_trailer,
|
|
};
|
|
|
|
int asf_init(void)
|
|
{
|
|
av_register_input_format(&asf_iformat);
|
|
av_register_output_format(&asf_oformat);
|
|
av_register_output_format(&asf_stream_oformat);
|
|
return 0;
|
|
}
|