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FFmpeg/libavformat/asf-enc.c

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/*
* 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
#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
#define ASF_PACKET_ERROR_CORRECTION_FLAGS (\
ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\
)
#if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
# define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
#else
# define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
#endif
#define ASF_PPI_PROPERTY_FLAGS (\
ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \
)
#define ASF_PPI_LENGTH_TYPE_FLAGS 0
#define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
# define ASF_PPI_SEQUENCE_FIELD_SIZE 1
#endif
#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
# define ASF_PPI_SEQUENCE_FIELD_SIZE 2
#endif
#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
# define ASF_PPI_SEQUENCE_FIELD_SIZE 4
#endif
#ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
# define ASF_PPI_SEQUENCE_FIELD_SIZE 0
#endif
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
#endif
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
#endif
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
#endif
#ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
#endif
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
#endif
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
#endif
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
#endif
#ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
#endif
#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
#endif
#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
#endif
#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
#endif
#ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
#endif
#if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
#endif
#if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
#endif
#if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
#endif
#ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
#endif
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
#endif
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
#endif
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
#endif
#ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
#endif
#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
#endif
#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
# define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
#endif
#ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
# define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
#endif
#define PACKET_HEADER_MIN_SIZE (\
ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \
ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \
1 + /*Length Type Flags*/ \
1 + /*Property Flags*/ \
ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \
ASF_PPI_SEQUENCE_FIELD_SIZE + \
ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \
4 + /*Send Time Field*/ \
2 /*Duration Field*/ \
)
// Replicated Data shall be at least 8 bytes long.
#define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
#define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\
1 + /*Stream Number*/ \
ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
ASF_PAYLOAD_REPLICATED_DATA_LENGTH \
)
#define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\
1 + /*Stream Number*/ \
ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
ASF_PAYLOAD_LENGTH_FIELD_SIZE \
)
#define SINGLE_PAYLOAD_DATA_LENGTH (\
PACKET_SIZE - \
PACKET_HEADER_MIN_SIZE - \
PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
)
#define MULTI_PAYLOAD_CONSTANT (\
PACKET_SIZE - \
PACKET_HEADER_MIN_SIZE - \
1 - /*Payload Flags*/ \
2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
)
static int preroll_time = 2000;
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); //size
put_le32(pb, asf->seqno);//sequence number
put_le16(pb, flags); /* unknown bytes */
put_le16(pb, length); //size_confirm
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_payloads = 0;
asf->prev_packet_sent_time = 0;
asf->packet_timestamp_start = -1;
asf->packet_timestamp_end = -1;
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);
}
static int put_payload_parsing_info(
AVFormatContext *s,
unsigned int sendtime,
unsigned int duration,
int nb_payloads,
int padsize
)
{
ASFContext *asf = s->priv_data;
ByteIOContext *pb = &s->pb;
int ppi_size, i;
unsigned char *start_ppi_ptr = pb->buf_ptr;
int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
put_byte(pb, 0x0);
}
if (asf->multi_payloads_present)
iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
if (padsize > 0) {
if (padsize < 256)
iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
else
iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
}
put_byte(pb, iLengthTypeFlags);
put_byte(pb, ASF_PPI_PROPERTY_FLAGS);
if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
put_le16(pb, padsize - 2);
if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
put_byte(pb, padsize - 1);
put_le32(pb, sendtime);
put_le16(pb, duration);
if (asf->multi_payloads_present)
put_byte(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
ppi_size = pb->buf_ptr - start_ppi_ptr;
return ppi_size;
}
static void flush_packet(AVFormatContext *s)
{
ASFContext *asf = s->priv_data;
int packet_hdr_size, packet_filled_size;
if (asf->is_streamed) {
put_chunk(s, 0x4424, asf->packet_size, 0);
}
packet_hdr_size = put_payload_parsing_info(
s,
asf->packet_timestamp_start,
asf->packet_timestamp_end - asf->packet_timestamp_start,
asf->packet_nb_payloads,
asf->packet_size_left
);
packet_filled_size = PACKET_SIZE - packet_hdr_size - asf->packet_size_left;
memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
put_buffer(&s->pb, asf->packet_buf, asf->packet_size - packet_hdr_size);
put_flush_packet(&s->pb);
asf->nb_packets++;
asf->packet_nb_payloads = 0;
asf->prev_packet_sent_time = asf->packet_timestamp_start;
asf->packet_timestamp_start = -1;
asf->packet_timestamp_end = -1;
init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
NULL, NULL, NULL, NULL);
}
static void put_payload_header(
AVFormatContext *s,
ASFStream *stream,
int presentation_time,
int m_obj_size,
int m_obj_offset,
int payload_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)
val |= ASF_PL_FLAG_KEY_FRAME;
put_byte(pb, val);
put_byte(pb, stream->seq); //Media object number
put_le32(pb, m_obj_offset); //Offset Into Media Object
// Replicated Data shall be at least 8 bytes long.
// The first 4 bytes of data shall contain the
// Size of the Media Object that the payload belongs to.
// The next 4 bytes of data shall contain the
// Presentation Time for the media object that the payload belongs to.
put_byte(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
put_le32(pb, m_obj_size); //Replicated Data - Media Object Size
put_le32(pb, presentation_time);//Replicated Data - Presentation Time
if (asf->multi_payloads_present){
put_le16(pb, payload_len); //payload length
}
}
static void put_frame(
AVFormatContext *s,
ASFStream *stream,
int timestamp,
const uint8_t *buf,
int m_obj_size
)
{
ASFContext *asf = s->priv_data;
int m_obj_offset, payload_len, frag_len1;
m_obj_offset = 0;
while (m_obj_offset < m_obj_size) {
payload_len = m_obj_size - m_obj_offset;
if (asf->packet_timestamp_start == -1) {
asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
if (asf->multi_payloads_present){
asf->packet_size_left = PACKET_SIZE; //For debug
asf->packet_size_left = PACKET_SIZE - PACKET_HEADER_MIN_SIZE - 1;
frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
}
else {
asf->packet_size_left = PACKET_SIZE - PACKET_HEADER_MIN_SIZE;
frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
}
if (asf->prev_packet_sent_time > timestamp)
asf->packet_timestamp_start = asf->prev_packet_sent_time;
else
asf->packet_timestamp_start = timestamp;
}
else {
// multi payloads
frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS;
if (asf->prev_packet_sent_time > timestamp)
asf->packet_timestamp_start = asf->prev_packet_sent_time;
else if (asf->packet_timestamp_start >= timestamp)
asf->packet_timestamp_start = timestamp;
}
if (frag_len1 > 0) {
if (payload_len > frag_len1)
payload_len = frag_len1;
else if (payload_len == (frag_len1 - 1))
payload_len = frag_len1 - 2; //additional byte need to put padding length
put_payload_header(s, stream, timestamp+preroll_time, m_obj_size, m_obj_offset, payload_len);
put_buffer(&asf->pb, buf, payload_len);
if (asf->multi_payloads_present)
asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
else
asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
asf->packet_timestamp_end = timestamp;
asf->packet_nb_payloads++;
} else {
payload_len = 0;
}
m_obj_offset += payload_len;
buf += payload_len;
if (!asf->multi_payloads_present)
flush_packet(s);
else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + 1))
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