1694 lines
52 KiB
C
1694 lines
52 KiB
C
/*
|
|
* ASF compatible encoder and decoder.
|
|
* Copyright (c) 2000, 2001 Fabrice Bellard.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include "avformat.h"
|
|
#include "avi.h"
|
|
//#include "mpegaudio.h"
|
|
#include <iconv.h>
|
|
|
|
#undef NDEBUG
|
|
#include <assert.h>
|
|
#define MPA_FRAME_SIZE 1152
|
|
#define PACKET_SIZE 3200
|
|
#define PACKET_HEADER_SIZE 12
|
|
#define FRAME_HEADER_SIZE 17
|
|
|
|
typedef struct {
|
|
int num;
|
|
int seq;
|
|
/* use for reading */
|
|
AVPacket pkt;
|
|
int frag_offset;
|
|
int timestamp;
|
|
int64_t duration;
|
|
|
|
int ds_span; /* descrambling */
|
|
int ds_packet_size;
|
|
int ds_chunk_size;
|
|
int ds_data_size;
|
|
int ds_silence_data;
|
|
|
|
int packet_pos;
|
|
|
|
} ASFStream;
|
|
|
|
typedef struct {
|
|
uint32_t v1;
|
|
uint16_t v2;
|
|
uint16_t v3;
|
|
uint8_t v4[8];
|
|
} GUID;
|
|
|
|
typedef struct {
|
|
GUID guid; // generated by client computer
|
|
uint64_t file_size; // in bytes
|
|
// invalid if broadcasting
|
|
uint64_t create_time; // time of creation, in 100-nanosecond units since 1.1.1601
|
|
// invalid if broadcasting
|
|
uint64_t packets_count; // how many packets are there in the file
|
|
// invalid if broadcasting
|
|
uint64_t play_time; // play time, in 100-nanosecond units
|
|
// invalid if broadcasting
|
|
uint64_t send_time; // time to send file, in 100-nanosecond units
|
|
// invalid if broadcasting (could be ignored)
|
|
uint32_t preroll; // timestamp of the first packet, in milliseconds
|
|
// if nonzero - substract from time
|
|
uint32_t ignore; // preroll is 64bit - but let's just ignore it
|
|
uint32_t flags; // 0x01 - broadcast
|
|
// 0x02 - seekable
|
|
// rest is reserved should be 0
|
|
uint32_t min_pktsize; // size of a data packet
|
|
// invalid if broadcasting
|
|
uint32_t max_pktsize; // shall be the same as for min_pktsize
|
|
// invalid if broadcasting
|
|
uint32_t max_bitrate; // bandwith of stream in bps
|
|
// should be the sum of bitrates of the
|
|
// individual media streams
|
|
} ASFMainHeader;
|
|
|
|
|
|
typedef struct {
|
|
int seqno;
|
|
int packet_size;
|
|
int is_streamed;
|
|
int asfid2avid[128]; /* conversion table from asf ID 2 AVStream ID */
|
|
ASFStream streams[128]; /* it's max number and it's not that big */
|
|
/* non streamed additonnal info */
|
|
int64_t nb_packets;
|
|
int64_t duration; /* in 100ns units */
|
|
/* packet filling */
|
|
int packet_size_left;
|
|
int packet_timestamp_start;
|
|
int packet_timestamp_end;
|
|
int packet_nb_frames;
|
|
uint8_t packet_buf[PACKET_SIZE];
|
|
ByteIOContext pb;
|
|
/* only for reading */
|
|
uint64_t data_offset; /* begining of the first data packet */
|
|
|
|
ASFMainHeader hdr;
|
|
|
|
int packet_flags;
|
|
int packet_property;
|
|
int packet_timestamp;
|
|
int packet_segsizetype;
|
|
int packet_segments;
|
|
int packet_seq;
|
|
int packet_replic_size;
|
|
int packet_key_frame;
|
|
int packet_padsize;
|
|
int packet_frag_offset;
|
|
int packet_frag_size;
|
|
int packet_frag_timestamp;
|
|
int packet_multi_size;
|
|
int packet_obj_size;
|
|
int packet_time_delta;
|
|
int packet_time_start;
|
|
int packet_pos;
|
|
|
|
int stream_index;
|
|
ASFStream* asf_st; /* currently decoded stream */
|
|
} ASFContext;
|
|
|
|
static const GUID asf_header = {
|
|
0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
|
|
};
|
|
|
|
static const GUID file_header = {
|
|
0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
|
|
};
|
|
|
|
static const GUID stream_header = {
|
|
0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
|
|
};
|
|
|
|
static const GUID audio_stream = {
|
|
0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
|
|
};
|
|
|
|
static const GUID audio_conceal_none = {
|
|
// 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
|
|
// New value lifted from avifile
|
|
0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
|
|
};
|
|
|
|
static const GUID video_stream = {
|
|
0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
|
|
};
|
|
|
|
static const GUID video_conceal_none = {
|
|
0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
|
|
};
|
|
|
|
|
|
static const GUID comment_header = {
|
|
0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
|
|
};
|
|
|
|
static const GUID codec_comment_header = {
|
|
0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
|
|
};
|
|
static const GUID codec_comment1_header = {
|
|
0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
|
|
};
|
|
|
|
static const GUID data_header = {
|
|
0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
|
|
};
|
|
|
|
static const GUID index_guid = {
|
|
0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
|
|
};
|
|
|
|
static const GUID head1_guid = {
|
|
0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
|
|
};
|
|
|
|
static const GUID head2_guid = {
|
|
0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
|
|
};
|
|
|
|
static const GUID extended_content_header = {
|
|
0xD2D0A440, 0xE307, 0x11D2, { 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50 },
|
|
};
|
|
|
|
/* I am not a number !!! This GUID is the one found on the PC used to
|
|
generate the stream */
|
|
static const GUID my_guid = {
|
|
0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
|
|
};
|
|
|
|
const CodecTag codec_wav_tags[] = {
|
|
{ CODEC_ID_MP2, 0x50 },
|
|
{ CODEC_ID_MP3, 0x55 },
|
|
{ CODEC_ID_AC3, 0x2000 },
|
|
{ CODEC_ID_PCM_S16LE, 0x01 },
|
|
{ CODEC_ID_PCM_U8, 0x01 }, /* must come after s16le in this list */
|
|
{ CODEC_ID_PCM_ALAW, 0x06 },
|
|
{ CODEC_ID_PCM_MULAW, 0x07 },
|
|
{ CODEC_ID_ADPCM_MS, 0x02 },
|
|
{ CODEC_ID_ADPCM_IMA_WAV, 0x11 },
|
|
{ CODEC_ID_ADPCM_IMA_DK4, 0x61 }, /* rogue format number */
|
|
{ CODEC_ID_ADPCM_IMA_DK3, 0x62 }, /* rogue format number */
|
|
{ CODEC_ID_WMAV1, 0x160 },
|
|
{ CODEC_ID_WMAV2, 0x161 },
|
|
{ 0, 0 },
|
|
};
|
|
|
|
enum CodecID codec_get_id(const CodecTag *tags, unsigned int tag)
|
|
{
|
|
while (tags->id != 0) {
|
|
if( toupper((tag >> 0)&0xFF) == toupper((tags->tag >> 0)&0xFF)
|
|
&& toupper((tag >> 8)&0xFF) == toupper((tags->tag >> 8)&0xFF)
|
|
&& toupper((tag >>16)&0xFF) == toupper((tags->tag >>16)&0xFF)
|
|
&& toupper((tag >>24)&0xFF) == toupper((tags->tag >>24)&0xFF))
|
|
return tags->id;
|
|
tags++;
|
|
}
|
|
return CODEC_ID_NONE;
|
|
}
|
|
|
|
int wav_codec_get_id(unsigned int tag, int bps)
|
|
{
|
|
int id;
|
|
id = codec_get_id(codec_wav_tags, tag);
|
|
if (id <= 0)
|
|
return id;
|
|
/* handle specific u8 codec */
|
|
if (id == CODEC_ID_PCM_S16LE && bps == 8)
|
|
id = CODEC_ID_PCM_U8;
|
|
return id;
|
|
}
|
|
|
|
void get_wav_header(ByteIOContext *pb, AVCodecContext *codec, int size)
|
|
{
|
|
int id;
|
|
|
|
id = get_le16(pb);
|
|
codec->codec_type = CODEC_TYPE_AUDIO;
|
|
codec->codec_tag = id;
|
|
codec->channels = get_le16(pb);
|
|
codec->sample_rate = get_le32(pb);
|
|
codec->bit_rate = get_le32(pb) * 8;
|
|
codec->block_align = get_le16(pb);
|
|
if (size == 14) { /* We're dealing with plain vanilla WAVEFORMAT */
|
|
codec->bits_per_sample = 8;
|
|
}else
|
|
codec->bits_per_sample = get_le16(pb);
|
|
codec->codec_id = wav_codec_get_id(id, codec->bits_per_sample);
|
|
|
|
if (size > 16) { /* We're obviously dealing with WAVEFORMATEX */
|
|
codec->extradata_size = get_le16(pb);
|
|
if (codec->extradata_size > 0) {
|
|
if (codec->extradata_size > size - 18)
|
|
codec->extradata_size = size - 18;
|
|
codec->extradata = av_mallocz(codec->extradata_size);
|
|
get_buffer(pb, codec->extradata, codec->extradata_size);
|
|
} else
|
|
codec->extradata_size = 0;
|
|
|
|
/* It is possible for the chunk to contain garbage at the end */
|
|
if (size - codec->extradata_size - 18 > 0)
|
|
url_fskip(pb, size - codec->extradata_size - 18);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
static void put_guid(ByteIOContext *s, const GUID *g)
|
|
{
|
|
int i;
|
|
|
|
put_le32(s, g->v1);
|
|
put_le16(s, g->v2);
|
|
put_le16(s, g->v3);
|
|
for(i=0;i<8;i++)
|
|
put_byte(s, g->v4[i]);
|
|
}
|
|
|
|
static void put_str16(ByteIOContext *s, const char *tag)
|
|
{
|
|
int c;
|
|
|
|
put_le16(s,strlen(tag) + 1);
|
|
for(;;) {
|
|
c = (uint8_t)*tag++;
|
|
put_le16(s, c);
|
|
if (c == '\0')
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void put_str16_nolen(ByteIOContext *s, const char *tag)
|
|
{
|
|
int c;
|
|
|
|
for(;;) {
|
|
c = (uint8_t)*tag++;
|
|
put_le16(s, c);
|
|
if (c == '\0')
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int64_t put_header(ByteIOContext *pb, const GUID *g)
|
|
{
|
|
int64_t pos;
|
|
|
|
pos = url_ftell(pb);
|
|
put_guid(pb, g);
|
|
put_le64(pb, 24);
|
|
return pos;
|
|
}
|
|
|
|
/* update header size */
|
|
static void end_header(ByteIOContext *pb, int64_t pos)
|
|
{
|
|
int64_t pos1;
|
|
|
|
pos1 = url_ftell(pb);
|
|
url_fseek(pb, pos + 16, SEEK_SET);
|
|
put_le64(pb, pos1 - pos);
|
|
url_fseek(pb, pos1, SEEK_SET);
|
|
}
|
|
|
|
/* write an asf chunk (only used in streaming case) */
|
|
static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ByteIOContext *pb = &s->pb;
|
|
int length;
|
|
|
|
length = payload_length + 8;
|
|
put_le16(pb, type);
|
|
put_le16(pb, length);
|
|
put_le32(pb, asf->seqno);
|
|
put_le16(pb, flags); /* unknown bytes */
|
|
put_le16(pb, length);
|
|
asf->seqno++;
|
|
}
|
|
|
|
/* convert from unix to windows time */
|
|
static int64_t unix_to_file_time(int ti)
|
|
{
|
|
int64_t t;
|
|
|
|
t = ti * int64_t_C(10000000);
|
|
t += int64_t_C(116444736000000000);
|
|
return t;
|
|
}
|
|
|
|
/* write the header (used two times if non streamed) */
|
|
static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ByteIOContext *pb = &s->pb;
|
|
int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
|
|
int has_title;
|
|
AVCodecContext *enc;
|
|
int64_t header_offset, cur_pos, hpos;
|
|
int bit_rate;
|
|
|
|
has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
|
|
|
|
bit_rate = 0;
|
|
for(n=0;n<s->nb_streams;n++) {
|
|
enc = &s->streams[n]->codec;
|
|
|
|
bit_rate += enc->bit_rate;
|
|
}
|
|
|
|
if (asf->is_streamed) {
|
|
put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
|
|
}
|
|
|
|
put_guid(pb, &asf_header);
|
|
put_le64(pb, -1); /* header length, will be patched after */
|
|
put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
|
|
put_byte(pb, 1); /* ??? */
|
|
put_byte(pb, 2); /* ??? */
|
|
|
|
/* file header */
|
|
header_offset = url_ftell(pb);
|
|
hpos = put_header(pb, &file_header);
|
|
put_guid(pb, &my_guid);
|
|
put_le64(pb, file_size);
|
|
file_time = 0;
|
|
put_le64(pb, unix_to_file_time(file_time));
|
|
put_le64(pb, asf->nb_packets); /* number of packets */
|
|
put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
|
|
put_le64(pb, asf->duration); /* duration (in 100ns units) */
|
|
put_le32(pb, 0); /* start time stamp */
|
|
put_le32(pb, 0); /* ??? */
|
|
put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
|
|
put_le32(pb, asf->packet_size); /* packet size */
|
|
put_le32(pb, asf->packet_size); /* packet size */
|
|
put_le32(pb, bit_rate); /* Nominal data rate in bps */
|
|
end_header(pb, hpos);
|
|
|
|
/* unknown headers */
|
|
hpos = put_header(pb, &head1_guid);
|
|
put_guid(pb, &head2_guid);
|
|
put_le32(pb, 6);
|
|
put_le16(pb, 0);
|
|
end_header(pb, hpos);
|
|
|
|
/* title and other infos */
|
|
if (has_title) {
|
|
hpos = put_header(pb, &comment_header);
|
|
put_le16(pb, 2 * (strlen(s->title) + 1));
|
|
put_le16(pb, 2 * (strlen(s->author) + 1));
|
|
put_le16(pb, 2 * (strlen(s->copyright) + 1));
|
|
put_le16(pb, 2 * (strlen(s->comment) + 1));
|
|
put_le16(pb, 0);
|
|
put_str16_nolen(pb, s->title);
|
|
put_str16_nolen(pb, s->author);
|
|
put_str16_nolen(pb, s->copyright);
|
|
put_str16_nolen(pb, s->comment);
|
|
end_header(pb, hpos);
|
|
}
|
|
|
|
/* stream headers */
|
|
for(n=0;n<s->nb_streams;n++) {
|
|
int64_t es_pos;
|
|
// ASFStream *stream = &asf->streams[n];
|
|
|
|
enc = &s->streams[n]->codec;
|
|
asf->streams[n].num = n + 1;
|
|
asf->streams[n].seq = 0;
|
|
|
|
switch(enc->codec_type) {
|
|
case CODEC_TYPE_AUDIO:
|
|
wav_extra_size = 0;
|
|
extra_size = 18 + wav_extra_size;
|
|
extra_size2 = 0;
|
|
break;
|
|
default:
|
|
case CODEC_TYPE_VIDEO:
|
|
wav_extra_size = 0;
|
|
extra_size = 0x33;
|
|
extra_size2 = 0;
|
|
break;
|
|
}
|
|
|
|
hpos = put_header(pb, &stream_header);
|
|
if (enc->codec_type == CODEC_TYPE_AUDIO) {
|
|
put_guid(pb, &audio_stream);
|
|
put_guid(pb, &audio_conceal_none);
|
|
} else {
|
|
put_guid(pb, &video_stream);
|
|
put_guid(pb, &video_conceal_none);
|
|
}
|
|
put_le64(pb, 0); /* ??? */
|
|
es_pos = url_ftell(pb);
|
|
put_le32(pb, extra_size); /* wav header len */
|
|
put_le32(pb, extra_size2); /* additional data len */
|
|
put_le16(pb, n + 1); /* stream number */
|
|
put_le32(pb, 0); /* ??? */
|
|
|
|
if (enc->codec_type == CODEC_TYPE_AUDIO) {
|
|
/* WAVEFORMATEX header */
|
|
int wavsize = put_wav_header(pb, enc);
|
|
|
|
if (wavsize < 0)
|
|
return -1;
|
|
if (wavsize != extra_size) {
|
|
cur_pos = url_ftell(pb);
|
|
url_fseek(pb, es_pos, SEEK_SET);
|
|
put_le32(pb, wavsize); /* wav header len */
|
|
url_fseek(pb, cur_pos, SEEK_SET);
|
|
}
|
|
} else {
|
|
put_le32(pb, enc->width);
|
|
put_le32(pb, enc->height);
|
|
put_byte(pb, 2); /* ??? */
|
|
put_le16(pb, 40); /* size */
|
|
|
|
/* BITMAPINFOHEADER header */
|
|
put_bmp_header(pb, enc, codec_bmp_tags, 1);
|
|
}
|
|
end_header(pb, hpos);
|
|
}
|
|
|
|
/* media comments */
|
|
|
|
hpos = put_header(pb, &codec_comment_header);
|
|
put_guid(pb, &codec_comment1_header);
|
|
put_le32(pb, s->nb_streams);
|
|
for(n=0;n<s->nb_streams;n++) {
|
|
AVCodec *p;
|
|
|
|
enc = &s->streams[n]->codec;
|
|
p = avcodec_find_encoder(enc->codec_id);
|
|
|
|
put_le16(pb, asf->streams[n].num);
|
|
put_str16(pb, p ? p->name : enc->codec_name);
|
|
put_le16(pb, 0); /* no parameters */
|
|
|
|
|
|
/* id */
|
|
if (enc->codec_type == CODEC_TYPE_AUDIO) {
|
|
put_le16(pb, 2);
|
|
if(!enc->codec_tag)
|
|
enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
|
|
if(!enc->codec_tag)
|
|
return -1;
|
|
put_le16(pb, enc->codec_tag);
|
|
} else {
|
|
put_le16(pb, 4);
|
|
if(!enc->codec_tag)
|
|
enc->codec_tag = codec_get_tag(codec_bmp_tags, enc->codec_id);
|
|
if(!enc->codec_tag)
|
|
return -1;
|
|
put_le32(pb, enc->codec_tag);
|
|
}
|
|
}
|
|
end_header(pb, hpos);
|
|
|
|
/* patch the header size fields */
|
|
|
|
cur_pos = url_ftell(pb);
|
|
header_size = cur_pos - header_offset;
|
|
if (asf->is_streamed) {
|
|
header_size += 8 + 30 + 50;
|
|
|
|
url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
|
|
put_le16(pb, header_size);
|
|
url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
|
|
put_le16(pb, header_size);
|
|
|
|
header_size -= 8 + 30 + 50;
|
|
}
|
|
header_size += 24 + 6;
|
|
url_fseek(pb, header_offset - 14, SEEK_SET);
|
|
put_le64(pb, header_size);
|
|
url_fseek(pb, cur_pos, SEEK_SET);
|
|
|
|
/* movie chunk, followed by packets of packet_size */
|
|
asf->data_offset = cur_pos;
|
|
put_guid(pb, &data_header);
|
|
put_le64(pb, data_chunk_size);
|
|
put_guid(pb, &my_guid);
|
|
put_le64(pb, asf->nb_packets); /* nb packets */
|
|
put_byte(pb, 1); /* ??? */
|
|
put_byte(pb, 1); /* ??? */
|
|
return 0;
|
|
}
|
|
|
|
static int asf_write_header(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
|
|
av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
|
|
|
|
asf->packet_size = PACKET_SIZE;
|
|
asf->nb_packets = 0;
|
|
|
|
if (asf_write_header1(s, 0, 50) < 0) {
|
|
//av_free(asf);
|
|
return -1;
|
|
}
|
|
|
|
put_flush_packet(&s->pb);
|
|
|
|
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,
|
|
const uint8_t *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,
|
|
const uint8_t *buf, int size, int64_t timestamp)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ASFStream *stream;
|
|
int64_t 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_t_C(10000000)) /
|
|
codec->sample_rate;
|
|
} else {
|
|
duration = av_rescale(codec->frame_number * codec->frame_rate_base, 10000000, 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_t 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;
|
|
}
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
/**********************************/
|
|
/* decoding */
|
|
|
|
//#define DEBUG
|
|
|
|
#ifdef DEBUG
|
|
#define PRINT_IF_GUID(g,cmp) \
|
|
if (!memcmp(g, &cmp, sizeof(GUID))) \
|
|
printf("(GUID: %s) ", #cmp)
|
|
|
|
static void print_guid(const GUID *g)
|
|
{
|
|
int i;
|
|
PRINT_IF_GUID(g, asf_header);
|
|
else PRINT_IF_GUID(g, file_header);
|
|
else PRINT_IF_GUID(g, stream_header);
|
|
else PRINT_IF_GUID(g, audio_stream);
|
|
else PRINT_IF_GUID(g, audio_conceal_none);
|
|
else PRINT_IF_GUID(g, video_stream);
|
|
else PRINT_IF_GUID(g, video_conceal_none);
|
|
else PRINT_IF_GUID(g, comment_header);
|
|
else PRINT_IF_GUID(g, codec_comment_header);
|
|
else PRINT_IF_GUID(g, codec_comment1_header);
|
|
else PRINT_IF_GUID(g, data_header);
|
|
else PRINT_IF_GUID(g, index_guid);
|
|
else PRINT_IF_GUID(g, head1_guid);
|
|
else PRINT_IF_GUID(g, head2_guid);
|
|
else PRINT_IF_GUID(g, my_guid);
|
|
else
|
|
printf("(GUID: unknown) ");
|
|
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");
|
|
}
|
|
#undef PRINT_IF_GUID(g,cmp)
|
|
#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 char *getlocale()
|
|
{
|
|
char *str;
|
|
|
|
str = strstr(getenv("LANG"), ".");
|
|
if(str)
|
|
*str++;
|
|
else
|
|
str = "US-ASCII";
|
|
|
|
return str;
|
|
}
|
|
|
|
static void tag_recode(char *before, unsigned int len)
|
|
{
|
|
return;
|
|
int result;
|
|
iconv_t frt;
|
|
char ansb[len];
|
|
char ansa[len];
|
|
char *ansbptr = ansb;
|
|
char *ansaptr = ansa;
|
|
unsigned int len1 = 2 * len;
|
|
unsigned int length = len;
|
|
|
|
memcpy(ansb, before, len);
|
|
frt = iconv_open(getlocale(), "UNICODE");
|
|
if (frt == (iconv_t) - 1)
|
|
{
|
|
return;
|
|
}
|
|
result = iconv(frt, &ansbptr, &len, &ansaptr, &len1);
|
|
if (result == (size_t) - 1)
|
|
{
|
|
return;
|
|
}
|
|
else
|
|
memcpy(before, ansa, length);
|
|
if (iconv_close(frt) != 0)
|
|
if (iconv_close(frt) != 0)
|
|
return;
|
|
return;
|
|
}
|
|
|
|
static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
|
|
{
|
|
int c, lenz;
|
|
char *q;
|
|
|
|
q = buf;
|
|
lenz = len;
|
|
while (len > 0) {
|
|
c = get_byte(pb);
|
|
if ((q - buf) < buf_size-1)
|
|
*q++ = c;
|
|
len--;
|
|
}
|
|
tag_recode(buf, lenz);
|
|
}
|
|
|
|
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;
|
|
int i;
|
|
int64_t 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, type_specific_size;
|
|
//unsigned int tag1;
|
|
int64_t pos1, pos2;
|
|
|
|
pos1 = url_ftell(pb);
|
|
|
|
st = av_new_stream(s, 0);
|
|
if (!st)
|
|
goto fail;
|
|
asf_st = av_mallocz(sizeof(ASFStream));
|
|
if (!asf_st)
|
|
goto fail;
|
|
st->priv_data = asf_st;
|
|
st->start_time = asf->hdr.preroll / (10000000 / AV_TIME_BASE);
|
|
st->duration = (asf->hdr.send_time - asf->hdr.preroll) /
|
|
(10000000 / AV_TIME_BASE);
|
|
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);
|
|
type_specific_size = get_le32(pb);
|
|
get_le32(pb);
|
|
st->id = get_le16(pb) & 0x7f; /* stream id */
|
|
// mapping of asf ID to AV stream ID;
|
|
asf->asfid2avid[st->id] = s->nb_streams - 1;
|
|
|
|
get_le32(pb);
|
|
st->codec.codec_type = type;
|
|
/* 1 fps default (XXX: put 0 fps instead) */
|
|
st->codec.frame_rate = 1;
|
|
st->codec.frame_rate_base = 1;
|
|
if (type == CODEC_TYPE_AUDIO) {
|
|
get_wav_header(pb, &st->codec, type_specific_size);
|
|
st->need_parsing = 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_MP3:
|
|
st->codec.frame_size = MPA_FRAME_SIZE;
|
|
break;
|
|
case CODEC_ID_PCM_S16LE:
|
|
case CODEC_ID_PCM_S16BE:
|
|
case CODEC_ID_PCM_U16LE:
|
|
case CODEC_ID_PCM_U16BE:
|
|
case CODEC_ID_PCM_S8:
|
|
case CODEC_ID_PCM_U8:
|
|
case CODEC_ID_PCM_ALAW:
|
|
case CODEC_ID_PCM_MULAW:
|
|
st->codec.frame_size = 1;
|
|
break;
|
|
default:
|
|
/* This is probably wrong, but it prevents a crash later */
|
|
st->codec.frame_size = 1;
|
|
break;
|
|
}
|
|
}
|
|
#if 0
|
|
} 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 */
|
|
st->codec.bits_per_sample = 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);
|
|
}
|
|
|
|
/* Extract palette from extradata if bpp <= 8 */
|
|
/* This code assumes that extradata contains only palette */
|
|
/* This is true for all paletted codecs implemented in ffmpeg */
|
|
if (st->codec.extradata_size && (st->codec.bits_per_sample <= 8)) {
|
|
st->codec.palctrl = av_mallocz(sizeof(AVPaletteControl));
|
|
#ifdef WORDS_BIGENDIAN
|
|
for (i = 0; i < FFMIN(st->codec.extradata_size, AVPALETTE_SIZE)/4; i++)
|
|
st->codec.palctrl->palette[i] = bswap_32(((uint32_t*)st->codec.extradata)[i]);
|
|
#else
|
|
memcpy(st->codec.palctrl->palette, st->codec.extradata,
|
|
FFMIN(st->codec.extradata_size, AVPALETTE_SIZE));
|
|
#endif
|
|
st->codec.palctrl->palette_changed = 1;
|
|
}
|
|
|
|
st->codec.codec_tag = tag1;
|
|
st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
|
|
}
|
|
#endif
|
|
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);
|
|
} else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
|
|
int desc_count, i;
|
|
|
|
desc_count = get_le16(pb);
|
|
for(i=0;i<desc_count;i++)
|
|
{
|
|
int name_len,value_type,value_len,value_num = 0;
|
|
char *name, *value;
|
|
|
|
name_len = get_le16(pb);
|
|
name = (char *)av_mallocz(name_len);
|
|
get_str16_nolen(pb, name_len, name, name_len);
|
|
value_type = get_le16(pb);
|
|
value_len = get_le16(pb);
|
|
if ((value_type == 0) || (value_type == 1)) // unicode or byte
|
|
{
|
|
value = (char *)av_mallocz(value_len);
|
|
get_str16_nolen(pb, value_len, value, value_len);
|
|
if (strcmp(name,"WM/AlbumTitle")==0) { strcpy(s->album, value); }
|
|
if (strcmp(name,"WM/Genre")==0) { strcpy(s->genre, value); }
|
|
if (strcmp(name,"WM/Year")==0) s->year = atoi(value);
|
|
av_free(value);
|
|
}
|
|
if ((value_type >= 2) || (value_type <= 5)) // boolean or DWORD or QWORD or WORD
|
|
{
|
|
if (value_type==2) value_num = get_le32(pb);
|
|
if (value_type==3) value_num = get_le32(pb);
|
|
if (value_type==4) value_num = get_le64(pb);
|
|
if (value_type==5) value_num = get_le16(pb);
|
|
if (strcmp(name,"WM/Track")==0) s->track = value_num + 1;
|
|
if (strcmp(name,"WM/TrackNumber")==0) s->track = value_num;
|
|
}
|
|
av_free(name);
|
|
}
|
|
#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 = 9;
|
|
int c;
|
|
|
|
assert((url_ftell(&s->pb) - s->data_offset) % asf->packet_size == 0);
|
|
|
|
c = get_byte(pb);
|
|
if (c != 0x82) {
|
|
if (!url_feof(pb))
|
|
printf("ff asf bad header %x at:%lld\n", c, url_ftell(pb));
|
|
}
|
|
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;
|
|
}
|
|
rsize+=2;
|
|
/* }else{
|
|
if (!url_feof(pb))
|
|
printf("ff asf bad header %x at:%lld\n", c, url_ftell(pb));
|
|
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);
|
|
asf->packet_pos= url_ftell(&s->pb);
|
|
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);
|
|
//printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
|
|
if (asf->packet_replic_size > 1) {
|
|
assert(asf->packet_replic_size >= 8);
|
|
// 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 if (asf->packet_replic_size==1){
|
|
// 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;
|
|
|
|
asf->packet_time_delta = get_byte(pb);
|
|
rsize++;
|
|
}else{
|
|
assert(asf->packet_replic_size==0);
|
|
}
|
|
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;
|
|
asf_st->packet_pos= asf->packet_pos;
|
|
//printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
|
|
//asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
|
|
//s->streams[asf->stream_index]->codec.codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
|
|
if (s->streams[asf->stream_index]->codec.codec_type == CODEC_TYPE_AUDIO)
|
|
asf->packet_key_frame = 1;
|
|
if (asf->packet_key_frame)
|
|
asf_st->pkt.flags |= PKT_FLAG_KEY;
|
|
}
|
|
|
|
/* read data */
|
|
//printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
|
|
// asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
|
|
// asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
|
|
asf->packet_size_left -= asf->packet_frag_size;
|
|
if (asf->packet_size_left < 0)
|
|
continue;
|
|
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 */
|
|
unsigned 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);
|
|
av_free(st->codec.palctrl);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// Added to support seeking after packets have been read
|
|
// If information is not reset, read_packet fails due to
|
|
// leftover information from previous reads
|
|
static void asf_reset_header(AVFormatContext *s)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
ASFStream *asf_st;
|
|
int i;
|
|
|
|
asf->packet_nb_frames = 0;
|
|
asf->packet_timestamp_start = -1;
|
|
asf->packet_timestamp_end = -1;
|
|
asf->packet_size_left = 0;
|
|
asf->packet_segments = 0;
|
|
asf->packet_flags = 0;
|
|
asf->packet_property = 0;
|
|
asf->packet_timestamp = 0;
|
|
asf->packet_segsizetype = 0;
|
|
asf->packet_segments = 0;
|
|
asf->packet_seq = 0;
|
|
asf->packet_replic_size = 0;
|
|
asf->packet_key_frame = 0;
|
|
asf->packet_padsize = 0;
|
|
asf->packet_frag_offset = 0;
|
|
asf->packet_frag_size = 0;
|
|
asf->packet_frag_timestamp = 0;
|
|
asf->packet_multi_size = 0;
|
|
asf->packet_obj_size = 0;
|
|
asf->packet_time_delta = 0;
|
|
asf->packet_time_start = 0;
|
|
|
|
for(i=0; i<s->nb_streams; i++){
|
|
asf_st= s->streams[i]->priv_data;
|
|
av_free_packet(&asf_st->pkt);
|
|
asf_st->frag_offset=0;
|
|
asf_st->seq=0;
|
|
}
|
|
asf->asf_st= NULL;
|
|
}
|
|
|
|
static int64_t asf_read_pts(AVFormatContext *s, int64_t *ppos, int stream_index)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVPacket pkt1, *pkt = &pkt1;
|
|
ASFStream *asf_st;
|
|
int64_t pts;
|
|
int64_t pos= *ppos;
|
|
int i;
|
|
int64_t start_pos[s->nb_streams];
|
|
|
|
for(i=0; i<s->nb_streams; i++){
|
|
start_pos[i]= pos;
|
|
}
|
|
|
|
//printf("asf_read_pts\n");
|
|
url_fseek(&s->pb, pos*asf->packet_size + s->data_offset, SEEK_SET);
|
|
asf_reset_header(s);
|
|
for(;;){
|
|
if (av_read_frame(s, pkt) < 0){
|
|
printf("seek failed\n");
|
|
return AV_NOPTS_VALUE;
|
|
}
|
|
pts= pkt->pts;
|
|
|
|
av_free_packet(pkt);
|
|
if(pkt->flags&PKT_FLAG_KEY){
|
|
i= pkt->stream_index;
|
|
|
|
asf_st= s->streams[i]->priv_data;
|
|
|
|
assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
|
|
pos= (asf_st->packet_pos - s->data_offset) / asf->packet_size;
|
|
|
|
av_add_index_entry(s->streams[i], pos, pts, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
|
|
start_pos[i]= pos + 1;
|
|
|
|
if(pkt->stream_index == stream_index)
|
|
break;
|
|
}
|
|
}
|
|
|
|
*ppos= pos;
|
|
//printf("found keyframe at %Ld stream %d stamp:%Ld\n", *ppos, stream_index, pts);
|
|
|
|
return pts;
|
|
}
|
|
|
|
static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts)
|
|
{
|
|
ASFContext *asf = s->priv_data;
|
|
AVStream *st;
|
|
int64_t pos;
|
|
int64_t pos_min, pos_max, pts_min, pts_max, cur_pts, pos_limit;
|
|
int no_change;
|
|
|
|
if (stream_index == -1)
|
|
stream_index= av_find_default_stream_index(s);
|
|
|
|
if (asf->packet_size <= 0)
|
|
return -1;
|
|
|
|
pts_max=
|
|
pts_min= AV_NOPTS_VALUE;
|
|
pos_max= pos_limit= -1; // gcc thinks its uninitalized
|
|
|
|
st= s->streams[stream_index];
|
|
if(st->index_entries){
|
|
AVIndexEntry *e;
|
|
int index;
|
|
|
|
index= av_index_search_timestamp(st, pts);
|
|
e= &st->index_entries[index];
|
|
if(e->timestamp <= pts){
|
|
pos_min= e->pos;
|
|
pts_min= e->timestamp;
|
|
#ifdef DEBUG_SEEK
|
|
printf("unsing cached pos_min=0x%llx dts_min=%0.3f\n",
|
|
pos_min,pts_min / 90000.0);
|
|
#endif
|
|
}else{
|
|
assert(index==0);
|
|
}
|
|
index++;
|
|
if(index < st->nb_index_entries){
|
|
e= &st->index_entries[index];
|
|
assert(e->timestamp >= pts);
|
|
pos_max= e->pos;
|
|
pts_max= e->timestamp;
|
|
pos_limit= pos_max - e->min_distance;
|
|
#ifdef DEBUG_SEEK
|
|
printf("unsing cached pos_max=0x%llx dts_max=%0.3f\n",
|
|
pos_max,pts_max / 90000.0);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
if(pts_min == AV_NOPTS_VALUE){
|
|
pos_min = 0;
|
|
pts_min = asf_read_pts(s, &pos_min, stream_index);
|
|
if (pts_min == AV_NOPTS_VALUE) return -1;
|
|
}
|
|
if(pts_max == AV_NOPTS_VALUE){
|
|
pos_max = (url_filesize(url_fileno(&s->pb)) - 1 - s->data_offset) / asf->packet_size; //FIXME wrong
|
|
pts_max = s->duration; //FIXME wrong
|
|
pos_limit= pos_max;
|
|
}
|
|
|
|
no_change=0;
|
|
while (pos_min < pos_limit) {
|
|
int64_t start_pos;
|
|
assert(pos_limit <= pos_max);
|
|
|
|
if(no_change==0){
|
|
int64_t approximate_keyframe_distance= pos_max - pos_limit;
|
|
// interpolate position (better than dichotomy)
|
|
pos = (int64_t)((double)(pos_max - pos_min) *
|
|
(double)(pts - pts_min) /
|
|
(double)(pts_max - pts_min)) + pos_min - approximate_keyframe_distance;
|
|
}else if(no_change==1){
|
|
// bisection, if interpolation failed to change min or max pos last time
|
|
pos = (pos_min + pos_limit)>>1;
|
|
}else{
|
|
// linear search if bisection failed, can only happen if there are very few or no keyframes between min/max
|
|
pos=pos_min;
|
|
}
|
|
if(pos <= pos_min)
|
|
pos= pos_min + 1;
|
|
else if(pos > pos_limit)
|
|
pos= pos_limit;
|
|
start_pos= pos;
|
|
|
|
// read the next timestamp
|
|
cur_pts = asf_read_pts(s, &pos, stream_index);
|
|
if(pos == pos_max)
|
|
no_change++;
|
|
else
|
|
no_change=0;
|
|
|
|
#ifdef DEBUG_SEEK
|
|
printf("%Ld %Ld %Ld / %Ld %Ld %Ld target:%Ld limit:%Ld start:%Ld\n", pos_min, pos, pos_max, pts_min, cur_pts, pts_max, pts, pos_limit, start_pos);
|
|
#endif
|
|
assert (cur_pts != AV_NOPTS_VALUE);
|
|
if (pts < cur_pts) {
|
|
pos_limit = start_pos - 1;
|
|
pos_max = pos;
|
|
pts_max = cur_pts;
|
|
} else {
|
|
pos_min = pos;
|
|
pts_min = cur_pts;
|
|
/* check if we are lucky */
|
|
if (pts == cur_pts)
|
|
break;
|
|
}
|
|
}
|
|
pos = pos_min;
|
|
url_fseek(&s->pb, pos*asf->packet_size + s->data_offset, SEEK_SET);
|
|
asf_reset_header(s);
|
|
return 0;
|
|
}
|
|
|
|
static AVInputFormat asf_iformat = {
|
|
"asf",
|
|
"asf format",
|
|
sizeof(ASFContext),
|
|
asf_probe,
|
|
asf_read_header,
|
|
asf_read_packet,
|
|
asf_read_close,
|
|
asf_read_seek,
|
|
};
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
static AVOutputFormat asf_oformat = {
|
|
"asf",
|
|
"asf format",
|
|
"video/x-ms-asf",
|
|
"asf,wmv",
|
|
sizeof(ASFContext),
|
|
#ifdef CONFIG_MP3LAME
|
|
CODEC_ID_MP3,
|
|
#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",
|
|
"video/x-ms-asf",
|
|
"asf,wmv",
|
|
sizeof(ASFContext),
|
|
#ifdef CONFIG_MP3LAME
|
|
CODEC_ID_MP3,
|
|
#else
|
|
CODEC_ID_MP2,
|
|
#endif
|
|
CODEC_ID_MSMPEG4V3,
|
|
asf_write_stream_header,
|
|
asf_write_packet,
|
|
asf_write_trailer,
|
|
};
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
int asf_init(void)
|
|
{
|
|
av_register_input_format(&asf_iformat);
|
|
#ifdef CONFIG_ENCODERS
|
|
av_register_output_format(&asf_oformat);
|
|
av_register_output_format(&asf_stream_oformat);
|
|
#endif //CONFIG_ENCODERS
|
|
return 0;
|
|
}
|