856 lines
26 KiB
C
856 lines
26 KiB
C
/*
|
|
* "Real" compatible mux and demux.
|
|
* 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"
|
|
|
|
/* in ms */
|
|
#define BUFFER_DURATION 0
|
|
|
|
typedef struct {
|
|
int nb_packets;
|
|
int packet_total_size;
|
|
int packet_max_size;
|
|
/* codec related output */
|
|
int bit_rate;
|
|
float frame_rate;
|
|
int nb_frames; /* current frame number */
|
|
int total_frames; /* total number of frames */
|
|
int num;
|
|
AVCodecContext *enc;
|
|
} StreamInfo;
|
|
|
|
typedef struct {
|
|
StreamInfo streams[2];
|
|
StreamInfo *audio_stream, *video_stream;
|
|
int data_pos; /* position of the data after the header */
|
|
int nb_packets;
|
|
int old_format;
|
|
} RMContext;
|
|
|
|
static void put_str(ByteIOContext *s, const char *tag)
|
|
{
|
|
put_be16(s,strlen(tag));
|
|
while (*tag) {
|
|
put_byte(s, *tag++);
|
|
}
|
|
}
|
|
|
|
static void put_str8(ByteIOContext *s, const char *tag)
|
|
{
|
|
put_byte(s, strlen(tag));
|
|
while (*tag) {
|
|
put_byte(s, *tag++);
|
|
}
|
|
}
|
|
|
|
static void rv10_write_header(AVFormatContext *ctx,
|
|
int data_size, int index_pos)
|
|
{
|
|
RMContext *rm = ctx->priv_data;
|
|
ByteIOContext *s = &ctx->pb;
|
|
StreamInfo *stream;
|
|
unsigned char *data_offset_ptr, *start_ptr;
|
|
const char *desc, *mimetype;
|
|
int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i;
|
|
int bit_rate, v, duration, flags, data_pos;
|
|
|
|
start_ptr = s->buf_ptr;
|
|
|
|
put_tag(s, ".RMF");
|
|
put_be32(s,18); /* header size */
|
|
put_be16(s,0);
|
|
put_be32(s,0);
|
|
put_be32(s,4 + ctx->nb_streams); /* num headers */
|
|
|
|
put_tag(s,"PROP");
|
|
put_be32(s, 50);
|
|
put_be16(s, 0);
|
|
packet_max_size = 0;
|
|
packet_total_size = 0;
|
|
nb_packets = 0;
|
|
bit_rate = 0;
|
|
duration = 0;
|
|
for(i=0;i<ctx->nb_streams;i++) {
|
|
StreamInfo *stream = &rm->streams[i];
|
|
bit_rate += stream->bit_rate;
|
|
if (stream->packet_max_size > packet_max_size)
|
|
packet_max_size = stream->packet_max_size;
|
|
nb_packets += stream->nb_packets;
|
|
packet_total_size += stream->packet_total_size;
|
|
/* select maximum duration */
|
|
v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate);
|
|
if (v > duration)
|
|
duration = v;
|
|
}
|
|
put_be32(s, bit_rate); /* max bit rate */
|
|
put_be32(s, bit_rate); /* avg bit rate */
|
|
put_be32(s, packet_max_size); /* max packet size */
|
|
if (nb_packets > 0)
|
|
packet_avg_size = packet_total_size / nb_packets;
|
|
else
|
|
packet_avg_size = 0;
|
|
put_be32(s, packet_avg_size); /* avg packet size */
|
|
put_be32(s, nb_packets); /* num packets */
|
|
put_be32(s, duration); /* duration */
|
|
put_be32(s, BUFFER_DURATION); /* preroll */
|
|
put_be32(s, index_pos); /* index offset */
|
|
/* computation of data the data offset */
|
|
data_offset_ptr = s->buf_ptr;
|
|
put_be32(s, 0); /* data offset : will be patched after */
|
|
put_be16(s, ctx->nb_streams); /* num streams */
|
|
flags = 1 | 2; /* save allowed & perfect play */
|
|
if (url_is_streamed(s))
|
|
flags |= 4; /* live broadcast */
|
|
put_be16(s, flags);
|
|
|
|
/* comments */
|
|
|
|
put_tag(s,"CONT");
|
|
size = strlen(ctx->title) + strlen(ctx->author) + strlen(ctx->copyright) +
|
|
strlen(ctx->comment) + 4 * 2 + 10;
|
|
put_be32(s,size);
|
|
put_be16(s,0);
|
|
put_str(s, ctx->title);
|
|
put_str(s, ctx->author);
|
|
put_str(s, ctx->copyright);
|
|
put_str(s, ctx->comment);
|
|
|
|
for(i=0;i<ctx->nb_streams;i++) {
|
|
int codec_data_size;
|
|
|
|
stream = &rm->streams[i];
|
|
|
|
if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
|
|
desc = "The Audio Stream";
|
|
mimetype = "audio/x-pn-realaudio";
|
|
codec_data_size = 73;
|
|
} else {
|
|
desc = "The Video Stream";
|
|
mimetype = "video/x-pn-realvideo";
|
|
codec_data_size = 34;
|
|
}
|
|
|
|
put_tag(s,"MDPR");
|
|
size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size;
|
|
put_be32(s, size);
|
|
put_be16(s, 0);
|
|
|
|
put_be16(s, i); /* stream number */
|
|
put_be32(s, stream->bit_rate); /* max bit rate */
|
|
put_be32(s, stream->bit_rate); /* avg bit rate */
|
|
put_be32(s, stream->packet_max_size); /* max packet size */
|
|
if (stream->nb_packets > 0)
|
|
packet_avg_size = stream->packet_total_size /
|
|
stream->nb_packets;
|
|
else
|
|
packet_avg_size = 0;
|
|
put_be32(s, packet_avg_size); /* avg packet size */
|
|
put_be32(s, 0); /* start time */
|
|
put_be32(s, BUFFER_DURATION); /* preroll */
|
|
/* duration */
|
|
if (url_is_streamed(s) || !stream->total_frames)
|
|
put_be32(s, (int)(3600 * 1000));
|
|
else
|
|
put_be32(s, (int)(stream->total_frames * 1000 / stream->frame_rate));
|
|
put_str8(s, desc);
|
|
put_str8(s, mimetype);
|
|
put_be32(s, codec_data_size);
|
|
|
|
if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
|
|
int coded_frame_size, fscode, sample_rate;
|
|
sample_rate = stream->enc->sample_rate;
|
|
coded_frame_size = (stream->enc->bit_rate *
|
|
stream->enc->frame_size) / (8 * sample_rate);
|
|
/* audio codec info */
|
|
put_tag(s, ".ra");
|
|
put_byte(s, 0xfd);
|
|
put_be32(s, 0x00040000); /* version */
|
|
put_tag(s, ".ra4");
|
|
put_be32(s, 0x01b53530); /* stream length */
|
|
put_be16(s, 4); /* unknown */
|
|
put_be32(s, 0x39); /* header size */
|
|
|
|
switch(sample_rate) {
|
|
case 48000:
|
|
case 24000:
|
|
case 12000:
|
|
fscode = 1;
|
|
break;
|
|
default:
|
|
case 44100:
|
|
case 22050:
|
|
case 11025:
|
|
fscode = 2;
|
|
break;
|
|
case 32000:
|
|
case 16000:
|
|
case 8000:
|
|
fscode = 3;
|
|
}
|
|
put_be16(s, fscode); /* codec additional info, for AC3, seems
|
|
to be a frequency code */
|
|
/* special hack to compensate rounding errors... */
|
|
if (coded_frame_size == 557)
|
|
coded_frame_size--;
|
|
put_be32(s, coded_frame_size); /* frame length */
|
|
put_be32(s, 0x51540); /* unknown */
|
|
put_be32(s, 0x249f0); /* unknown */
|
|
put_be32(s, 0x249f0); /* unknown */
|
|
put_be16(s, 0x01);
|
|
/* frame length : seems to be very important */
|
|
put_be16(s, coded_frame_size);
|
|
put_be32(s, 0); /* unknown */
|
|
put_be16(s, stream->enc->sample_rate); /* sample rate */
|
|
put_be32(s, 0x10); /* unknown */
|
|
put_be16(s, stream->enc->channels);
|
|
put_str8(s, "Int0"); /* codec name */
|
|
put_str8(s, "dnet"); /* codec name */
|
|
put_be16(s, 0); /* title length */
|
|
put_be16(s, 0); /* author length */
|
|
put_be16(s, 0); /* copyright length */
|
|
put_byte(s, 0); /* end of header */
|
|
} else {
|
|
/* video codec info */
|
|
put_be32(s,34); /* size */
|
|
put_tag(s,"VIDORV10");
|
|
put_be16(s, stream->enc->width);
|
|
put_be16(s, stream->enc->height);
|
|
put_be16(s, (int) stream->frame_rate); /* frames per seconds ? */
|
|
put_be32(s,0); /* unknown meaning */
|
|
put_be16(s, (int) stream->frame_rate); /* unknown meaning */
|
|
put_be32(s,0); /* unknown meaning */
|
|
put_be16(s, 8); /* unknown meaning */
|
|
/* Seems to be the codec version: only use basic H263. The next
|
|
versions seems to add a diffential DC coding as in
|
|
MPEG... nothing new under the sun */
|
|
put_be32(s,0x10000000);
|
|
//put_be32(s,0x10003000);
|
|
}
|
|
}
|
|
|
|
/* patch data offset field */
|
|
data_pos = s->buf_ptr - start_ptr;
|
|
rm->data_pos = data_pos;
|
|
data_offset_ptr[0] = data_pos >> 24;
|
|
data_offset_ptr[1] = data_pos >> 16;
|
|
data_offset_ptr[2] = data_pos >> 8;
|
|
data_offset_ptr[3] = data_pos;
|
|
|
|
/* data stream */
|
|
put_tag(s,"DATA");
|
|
put_be32(s,data_size + 10 + 8);
|
|
put_be16(s,0);
|
|
|
|
put_be32(s, nb_packets); /* number of packets */
|
|
put_be32(s,0); /* next data header */
|
|
}
|
|
|
|
static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream,
|
|
int length, int key_frame)
|
|
{
|
|
int timestamp;
|
|
ByteIOContext *s = &ctx->pb;
|
|
|
|
stream->nb_packets++;
|
|
stream->packet_total_size += length;
|
|
if (length > stream->packet_max_size)
|
|
stream->packet_max_size = length;
|
|
|
|
put_be16(s,0); /* version */
|
|
put_be16(s,length + 12);
|
|
put_be16(s, stream->num); /* stream number */
|
|
timestamp = (1000 * (float)stream->nb_frames) / stream->frame_rate;
|
|
put_be32(s, timestamp); /* timestamp */
|
|
put_byte(s, 0); /* reserved */
|
|
put_byte(s, key_frame ? 2 : 0); /* flags */
|
|
}
|
|
|
|
static int rm_write_header(AVFormatContext *s)
|
|
{
|
|
RMContext *rm = s->priv_data;
|
|
StreamInfo *stream;
|
|
int n;
|
|
AVCodecContext *codec;
|
|
|
|
for(n=0;n<s->nb_streams;n++) {
|
|
s->streams[n]->id = n;
|
|
codec = &s->streams[n]->codec;
|
|
stream = &rm->streams[n];
|
|
memset(stream, 0, sizeof(StreamInfo));
|
|
stream->num = n;
|
|
stream->bit_rate = codec->bit_rate;
|
|
stream->enc = codec;
|
|
|
|
switch(codec->codec_type) {
|
|
case CODEC_TYPE_AUDIO:
|
|
rm->audio_stream = stream;
|
|
stream->frame_rate = (float)codec->sample_rate / (float)codec->frame_size;
|
|
/* XXX: dummy values */
|
|
stream->packet_max_size = 1024;
|
|
stream->nb_packets = 0;
|
|
stream->total_frames = stream->nb_packets;
|
|
break;
|
|
case CODEC_TYPE_VIDEO:
|
|
rm->video_stream = stream;
|
|
stream->frame_rate = (float)codec->frame_rate / (float)codec->frame_rate_base;
|
|
/* XXX: dummy values */
|
|
stream->packet_max_size = 4096;
|
|
stream->nb_packets = 0;
|
|
stream->total_frames = stream->nb_packets;
|
|
break;
|
|
default:
|
|
av_abort();
|
|
}
|
|
}
|
|
|
|
rv10_write_header(s, 0, 0);
|
|
put_flush_packet(&s->pb);
|
|
return 0;
|
|
}
|
|
|
|
static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size)
|
|
{
|
|
uint8_t *buf1;
|
|
RMContext *rm = s->priv_data;
|
|
ByteIOContext *pb = &s->pb;
|
|
StreamInfo *stream = rm->audio_stream;
|
|
int i;
|
|
|
|
/* XXX: suppress this malloc */
|
|
buf1= (uint8_t*) av_malloc( size * sizeof(uint8_t) );
|
|
|
|
write_packet_header(s, stream, size, stream->enc->coded_frame->key_frame);
|
|
|
|
/* for AC3, the words seems to be reversed */
|
|
for(i=0;i<size;i+=2) {
|
|
buf1[i] = buf[i+1];
|
|
buf1[i+1] = buf[i];
|
|
}
|
|
put_buffer(pb, buf1, size);
|
|
put_flush_packet(pb);
|
|
stream->nb_frames++;
|
|
av_free(buf1);
|
|
return 0;
|
|
}
|
|
|
|
static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size)
|
|
{
|
|
RMContext *rm = s->priv_data;
|
|
ByteIOContext *pb = &s->pb;
|
|
StreamInfo *stream = rm->video_stream;
|
|
int key_frame = stream->enc->coded_frame->key_frame;
|
|
|
|
/* XXX: this is incorrect: should be a parameter */
|
|
|
|
/* Well, I spent some time finding the meaning of these bits. I am
|
|
not sure I understood everything, but it works !! */
|
|
#if 1
|
|
write_packet_header(s, stream, size + 7, key_frame);
|
|
/* bit 7: '1' if final packet of a frame converted in several packets */
|
|
put_byte(pb, 0x81);
|
|
/* bit 7: '1' if I frame. bits 6..0 : sequence number in current
|
|
frame starting from 1 */
|
|
if (key_frame) {
|
|
put_byte(pb, 0x81);
|
|
} else {
|
|
put_byte(pb, 0x01);
|
|
}
|
|
put_be16(pb, 0x4000 | (size)); /* total frame size */
|
|
put_be16(pb, 0x4000 | (size)); /* offset from the start or the end */
|
|
#else
|
|
/* full frame */
|
|
write_packet_header(s, size + 6);
|
|
put_byte(pb, 0xc0);
|
|
put_be16(pb, 0x4000 | size); /* total frame size */
|
|
put_be16(pb, 0x4000 + packet_number * 126); /* position in stream */
|
|
#endif
|
|
put_byte(pb, stream->nb_frames & 0xff);
|
|
|
|
put_buffer(pb, buf, size);
|
|
put_flush_packet(pb);
|
|
|
|
stream->nb_frames++;
|
|
return 0;
|
|
}
|
|
|
|
static int rm_write_packet(AVFormatContext *s, int stream_index,
|
|
const uint8_t *buf, int size, int64_t pts)
|
|
{
|
|
if (s->streams[stream_index]->codec.codec_type ==
|
|
CODEC_TYPE_AUDIO)
|
|
return rm_write_audio(s, buf, size);
|
|
else
|
|
return rm_write_video(s, buf, size);
|
|
}
|
|
|
|
static int rm_write_trailer(AVFormatContext *s)
|
|
{
|
|
RMContext *rm = s->priv_data;
|
|
int data_size, index_pos, i;
|
|
ByteIOContext *pb = &s->pb;
|
|
|
|
if (!url_is_streamed(&s->pb)) {
|
|
/* end of file: finish to write header */
|
|
index_pos = url_fseek(pb, 0, SEEK_CUR);
|
|
data_size = index_pos - rm->data_pos;
|
|
|
|
/* index */
|
|
put_tag(pb, "INDX");
|
|
put_be32(pb, 10 + 10 * s->nb_streams);
|
|
put_be16(pb, 0);
|
|
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
put_be32(pb, 0); /* zero indices */
|
|
put_be16(pb, i); /* stream number */
|
|
put_be32(pb, 0); /* next index */
|
|
}
|
|
/* undocumented end header */
|
|
put_be32(pb, 0);
|
|
put_be32(pb, 0);
|
|
|
|
url_fseek(pb, 0, SEEK_SET);
|
|
for(i=0;i<s->nb_streams;i++)
|
|
rm->streams[i].total_frames = rm->streams[i].nb_frames;
|
|
rv10_write_header(s, data_size, index_pos);
|
|
} else {
|
|
/* undocumented end header */
|
|
put_be32(pb, 0);
|
|
put_be32(pb, 0);
|
|
}
|
|
put_flush_packet(pb);
|
|
return 0;
|
|
}
|
|
|
|
/***************************************************/
|
|
|
|
static void get_str(ByteIOContext *pb, char *buf, int buf_size)
|
|
{
|
|
int len, i;
|
|
char *q;
|
|
|
|
len = get_be16(pb);
|
|
q = buf;
|
|
for(i=0;i<len;i++) {
|
|
if (i < buf_size - 1)
|
|
*q++ = get_byte(pb);
|
|
}
|
|
*q = '\0';
|
|
}
|
|
|
|
static void get_str8(ByteIOContext *pb, char *buf, int buf_size)
|
|
{
|
|
int len, i;
|
|
char *q;
|
|
|
|
len = get_byte(pb);
|
|
q = buf;
|
|
for(i=0;i<len;i++) {
|
|
if (i < buf_size - 1)
|
|
*q++ = get_byte(pb);
|
|
}
|
|
*q = '\0';
|
|
}
|
|
|
|
static void rm_read_audio_stream_info(AVFormatContext *s, AVStream *st,
|
|
int read_all)
|
|
{
|
|
ByteIOContext *pb = &s->pb;
|
|
char buf[128];
|
|
uint32_t version;
|
|
int i;
|
|
|
|
/* ra type header */
|
|
version = get_be32(pb); /* version */
|
|
if (((version >> 16) & 0xff) == 3) {
|
|
/* very old version */
|
|
for(i = 0; i < 14; i++)
|
|
get_byte(pb);
|
|
get_str8(pb, s->title, sizeof(s->title));
|
|
get_str8(pb, s->author, sizeof(s->author));
|
|
get_str8(pb, s->copyright, sizeof(s->copyright));
|
|
get_str8(pb, s->comment, sizeof(s->comment));
|
|
get_byte(pb);
|
|
get_str8(pb, buf, sizeof(buf));
|
|
st->codec.sample_rate = 8000;
|
|
st->codec.channels = 1;
|
|
st->codec.codec_type = CODEC_TYPE_AUDIO;
|
|
st->codec.codec_id = CODEC_ID_RA_144;
|
|
} else {
|
|
/* old version (4) */
|
|
get_be32(pb); /* .ra4 */
|
|
get_be32(pb);
|
|
get_be16(pb);
|
|
get_be32(pb); /* header size */
|
|
get_be16(pb); /* add codec info */
|
|
get_be32(pb); /* coded frame size */
|
|
get_be32(pb); /* ??? */
|
|
get_be32(pb); /* ??? */
|
|
get_be32(pb); /* ??? */
|
|
get_be16(pb); /* 1 */
|
|
get_be16(pb); /* coded frame size */
|
|
get_be32(pb);
|
|
st->codec.sample_rate = get_be16(pb);
|
|
get_be32(pb);
|
|
st->codec.channels = get_be16(pb);
|
|
get_str8(pb, buf, sizeof(buf)); /* desc */
|
|
get_str8(pb, buf, sizeof(buf)); /* desc */
|
|
st->codec.codec_type = CODEC_TYPE_AUDIO;
|
|
if (!strcmp(buf, "dnet")) {
|
|
st->codec.codec_id = CODEC_ID_AC3;
|
|
} else {
|
|
st->codec.codec_id = CODEC_ID_NONE;
|
|
pstrcpy(st->codec.codec_name, sizeof(st->codec.codec_name),
|
|
buf);
|
|
}
|
|
if (read_all) {
|
|
get_byte(pb);
|
|
get_byte(pb);
|
|
get_byte(pb);
|
|
|
|
get_str8(pb, s->title, sizeof(s->title));
|
|
get_str8(pb, s->author, sizeof(s->author));
|
|
get_str8(pb, s->copyright, sizeof(s->copyright));
|
|
get_str8(pb, s->comment, sizeof(s->comment));
|
|
}
|
|
}
|
|
}
|
|
|
|
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
RMContext *rm = s->priv_data;
|
|
AVStream *st;
|
|
|
|
rm->old_format = 1;
|
|
st = av_new_stream(s, 0);
|
|
if (!st)
|
|
goto fail;
|
|
rm_read_audio_stream_info(s, st, 1);
|
|
return 0;
|
|
fail:
|
|
return -1;
|
|
}
|
|
|
|
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
RMContext *rm = s->priv_data;
|
|
AVStream *st;
|
|
ByteIOContext *pb = &s->pb;
|
|
unsigned int tag, v;
|
|
int tag_size, size, codec_data_size, i;
|
|
int64_t codec_pos;
|
|
unsigned int h263_hack_version, start_time, duration;
|
|
char buf[128];
|
|
int flags = 0;
|
|
|
|
tag = get_le32(pb);
|
|
if (tag == MKTAG('.', 'r', 'a', 0xfd)) {
|
|
/* very old .ra format */
|
|
return rm_read_header_old(s, ap);
|
|
} else if (tag != MKTAG('.', 'R', 'M', 'F')) {
|
|
return -EIO;
|
|
}
|
|
|
|
get_be32(pb); /* header size */
|
|
get_be16(pb);
|
|
get_be32(pb);
|
|
get_be32(pb); /* number of headers */
|
|
|
|
for(;;) {
|
|
if (url_feof(pb))
|
|
goto fail;
|
|
tag = get_le32(pb);
|
|
tag_size = get_be32(pb);
|
|
get_be16(pb);
|
|
#if 0
|
|
printf("tag=%c%c%c%c (%08x) size=%d\n",
|
|
(tag) & 0xff,
|
|
(tag >> 8) & 0xff,
|
|
(tag >> 16) & 0xff,
|
|
(tag >> 24) & 0xff,
|
|
tag,
|
|
tag_size);
|
|
#endif
|
|
if (tag_size < 10)
|
|
goto fail;
|
|
switch(tag) {
|
|
case MKTAG('P', 'R', 'O', 'P'):
|
|
/* file header */
|
|
get_be32(pb); /* max bit rate */
|
|
get_be32(pb); /* avg bit rate */
|
|
get_be32(pb); /* max packet size */
|
|
get_be32(pb); /* avg packet size */
|
|
get_be32(pb); /* nb packets */
|
|
get_be32(pb); /* duration */
|
|
get_be32(pb); /* preroll */
|
|
get_be32(pb); /* index offset */
|
|
get_be32(pb); /* data offset */
|
|
get_be16(pb); /* nb streams */
|
|
flags = get_be16(pb); /* flags */
|
|
break;
|
|
case MKTAG('C', 'O', 'N', 'T'):
|
|
get_str(pb, s->title, sizeof(s->title));
|
|
get_str(pb, s->author, sizeof(s->author));
|
|
get_str(pb, s->copyright, sizeof(s->copyright));
|
|
get_str(pb, s->comment, sizeof(s->comment));
|
|
break;
|
|
case MKTAG('M', 'D', 'P', 'R'):
|
|
st = av_new_stream(s, 0);
|
|
if (!st)
|
|
goto fail;
|
|
st->id = get_be16(pb);
|
|
get_be32(pb); /* max bit rate */
|
|
st->codec.bit_rate = get_be32(pb); /* bit rate */
|
|
get_be32(pb); /* max packet size */
|
|
get_be32(pb); /* avg packet size */
|
|
start_time = get_be32(pb); /* start time */
|
|
get_be32(pb); /* preroll */
|
|
duration = get_be32(pb); /* duration */
|
|
st->start_time = start_time * (AV_TIME_BASE / 1000);
|
|
st->duration = duration * (AV_TIME_BASE / 1000);
|
|
get_str8(pb, buf, sizeof(buf)); /* desc */
|
|
get_str8(pb, buf, sizeof(buf)); /* mimetype */
|
|
codec_data_size = get_be32(pb);
|
|
codec_pos = url_ftell(pb);
|
|
|
|
v = get_be32(pb);
|
|
if (v == MKTAG(0xfd, 'a', 'r', '.')) {
|
|
/* ra type header */
|
|
rm_read_audio_stream_info(s, st, 0);
|
|
} else {
|
|
if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) {
|
|
fail1:
|
|
fprintf(stderr, "Unsupported video codec\n");
|
|
goto fail;
|
|
}
|
|
st->codec.codec_tag = get_le32(pb);
|
|
if (st->codec.codec_tag != MKTAG('R', 'V', '1', '0'))
|
|
goto fail1;
|
|
st->codec.width = get_be16(pb);
|
|
st->codec.height = get_be16(pb);
|
|
st->codec.frame_rate_base= 1;
|
|
st->codec.frame_rate = get_be16(pb) * st->codec.frame_rate_base;
|
|
st->codec.codec_type = CODEC_TYPE_VIDEO;
|
|
get_be32(pb);
|
|
get_be16(pb);
|
|
get_be32(pb);
|
|
get_be16(pb);
|
|
/* modification of h263 codec version (!) */
|
|
h263_hack_version = get_be32(pb);
|
|
switch(h263_hack_version) {
|
|
case 0x10000000:
|
|
case 0x10003000:
|
|
case 0x10003001:
|
|
st->codec.sub_id = h263_hack_version;
|
|
st->codec.codec_id = CODEC_ID_RV10;
|
|
break;
|
|
default:
|
|
/* not handled */
|
|
st->codec.codec_id = CODEC_ID_NONE;
|
|
break;
|
|
}
|
|
}
|
|
/* skip codec info */
|
|
size = url_ftell(pb) - codec_pos;
|
|
url_fskip(pb, codec_data_size - size);
|
|
break;
|
|
case MKTAG('D', 'A', 'T', 'A'):
|
|
goto header_end;
|
|
default:
|
|
/* unknown tag: skip it */
|
|
url_fskip(pb, tag_size - 10);
|
|
break;
|
|
}
|
|
}
|
|
header_end:
|
|
rm->nb_packets = get_be32(pb); /* number of packets */
|
|
if (!rm->nb_packets && (flags & 4))
|
|
rm->nb_packets = 3600 * 25;
|
|
get_be32(pb); /* next data header */
|
|
return 0;
|
|
|
|
fail:
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
av_free(s->streams[i]);
|
|
}
|
|
return -EIO;
|
|
}
|
|
|
|
static int get_num(ByteIOContext *pb, int *len)
|
|
{
|
|
int n, n1;
|
|
|
|
n = get_be16(pb);
|
|
(*len)-=2;
|
|
if (n >= 0x4000) {
|
|
return n - 0x4000;
|
|
} else {
|
|
n1 = get_be16(pb);
|
|
(*len)-=2;
|
|
return (n << 16) | n1;
|
|
}
|
|
}
|
|
|
|
/* multiple of 20 bytes for ra144 (ugly) */
|
|
#define RAW_PACKET_SIZE 1000
|
|
|
|
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
RMContext *rm = s->priv_data;
|
|
ByteIOContext *pb = &s->pb;
|
|
AVStream *st;
|
|
int len, num, timestamp, i, tmp, j;
|
|
uint8_t *ptr;
|
|
int flags;
|
|
|
|
if (rm->old_format) {
|
|
/* just read raw bytes */
|
|
len = RAW_PACKET_SIZE;
|
|
av_new_packet(pkt, len);
|
|
pkt->stream_index = 0;
|
|
len = get_buffer(pb, pkt->data, len);
|
|
if (len <= 0) {
|
|
av_free_packet(pkt);
|
|
return -EIO;
|
|
}
|
|
pkt->size = len;
|
|
st = s->streams[0];
|
|
} else {
|
|
redo:
|
|
if (rm->nb_packets == 0)
|
|
return -EIO;
|
|
get_be16(pb);
|
|
len = get_be16(pb);
|
|
if (len < 12)
|
|
return -EIO;
|
|
num = get_be16(pb);
|
|
timestamp = get_be32(pb);
|
|
get_byte(pb); /* reserved */
|
|
flags = get_byte(pb); /* flags */
|
|
rm->nb_packets--;
|
|
len -= 12;
|
|
|
|
st = NULL;
|
|
for(i=0;i<s->nb_streams;i++) {
|
|
st = s->streams[i];
|
|
if (num == st->id)
|
|
break;
|
|
}
|
|
if (i == s->nb_streams) {
|
|
/* skip packet if unknown number */
|
|
url_fskip(pb, len);
|
|
goto redo;
|
|
}
|
|
|
|
if (st->codec.codec_type == CODEC_TYPE_VIDEO) {
|
|
int full_frame, h, pic_num;
|
|
|
|
h= get_byte(pb);
|
|
if ((h & 0xc0) == 0xc0) {
|
|
int len2, pos;
|
|
full_frame = 1;
|
|
len2= get_num(pb, &len);
|
|
pos = get_num(pb, &len);
|
|
//printf("pos:%d\n",len);
|
|
len -= 2;
|
|
} else {
|
|
int seq, frame_size, pos;
|
|
full_frame = 0;
|
|
seq = get_byte(pb);
|
|
frame_size = get_num(pb, &len);
|
|
pos = get_num(pb, &len);
|
|
//printf("seq:%d, size:%d, pos:%d\n",seq,frame_size,pos);
|
|
len -= 3;
|
|
}
|
|
/* picture number */
|
|
pic_num= get_byte(pb);
|
|
|
|
//XXX/FIXME/HACK, demuxer should be fixed to send complete frames ...
|
|
if(st->codec.slice_offset==NULL)
|
|
st->codec.slice_offset= (int*)av_malloc(sizeof(int));
|
|
st->codec.slice_count= full_frame;
|
|
st->codec.slice_offset[0]= 0;
|
|
}
|
|
|
|
av_new_packet(pkt, len);
|
|
pkt->stream_index = i;
|
|
get_buffer(pb, pkt->data, len);
|
|
}
|
|
|
|
/* for AC3, needs to swap bytes */
|
|
if (st->codec.codec_id == CODEC_ID_AC3) {
|
|
ptr = pkt->data;
|
|
for(j=0;j<len;j+=2) {
|
|
tmp = ptr[0];
|
|
ptr[0] = ptr[1];
|
|
ptr[1] = tmp;
|
|
ptr += 2;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int rm_read_close(AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int rm_probe(AVProbeData *p)
|
|
{
|
|
/* check file header */
|
|
if (p->buf_size <= 32)
|
|
return 0;
|
|
if ((p->buf[0] == '.' && p->buf[1] == 'R' &&
|
|
p->buf[2] == 'M' && p->buf[3] == 'F' &&
|
|
p->buf[4] == 0 && p->buf[5] == 0) ||
|
|
(p->buf[0] == '.' && p->buf[1] == 'r' &&
|
|
p->buf[2] == 'a' && p->buf[3] == 0xfd))
|
|
return AVPROBE_SCORE_MAX;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static AVInputFormat rm_iformat = {
|
|
"rm",
|
|
"rm format",
|
|
sizeof(RMContext),
|
|
rm_probe,
|
|
rm_read_header,
|
|
rm_read_packet,
|
|
rm_read_close,
|
|
};
|
|
|
|
static AVOutputFormat rm_oformat = {
|
|
"rm",
|
|
"rm format",
|
|
"application/vnd.rn-realmedia",
|
|
"rm,ra",
|
|
sizeof(RMContext),
|
|
CODEC_ID_AC3,
|
|
CODEC_ID_RV10,
|
|
rm_write_header,
|
|
rm_write_packet,
|
|
rm_write_trailer,
|
|
};
|
|
|
|
int rm_init(void)
|
|
{
|
|
av_register_input_format(&rm_iformat);
|
|
av_register_output_format(&rm_oformat);
|
|
return 0;
|
|
}
|