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split asf patch by (Konstantin Andreyev <kandreyev at bcsii dot com>) 

Originally committed as revision 2850 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Konstantin Andreyev 2004-03-05 21:34:30 +00:00 committed by Michael Niedermayer
parent c0a0170c16
commit 542993b06e
3 changed files with 725 additions and 681 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

540
libavformat/asf-enc.c Normal file
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@ -0,0 +1,540 @@
/*
* Adaptive stream format encoder
* 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 "asf.h"
#undef NDEBUG
#include <assert.h>
#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;
}
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,
};
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

685
libavformat/asf.c
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@ -1,5 +1,5 @@
/*
* ASF compatible encoder and decoder.
* ASF compatible decoder.
* Copyright (c) 2000, 2001 Fabrice Bellard.
*
* This library is free software; you can redistribute it and/or
@ -19,661 +19,15 @@
#include "avformat.h"
#include "avi.h"
#include "mpegaudio.h"
#include "asf.h"
#undef NDEBUG
#include <assert.h>
#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 },
};
#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 */
@ -1520,39 +874,8 @@ static AVInputFormat asf_iformat = {
};
#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,
};
extern AVOutputFormat asf_oformat;
extern AVOutputFormat asf_stream_oformat;
#endif //CONFIG_ENCODERS
int asf_init(void)

181
libavformat/asf.h Normal file
View File

@ -0,0 +1,181 @@
/*
* 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
*/
#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 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 },
};