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mpv/libmpdemux/demux_real.c

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/*
Real parser & demuxer
(C) Alex Beregszaszi <alex@naxine.org>
Based on FFmpeg's libav/rm.c.
Audio codecs: (supported by RealPlayer8 for Linux)
DNET - RealAudio 3.0, really it's AC3 in swapped-byteorder
SIPR - SiproLab's audio codec, ACELP decoder working with MPlayer,
needs fine-tuning too :)
ATRC - RealAudio 8 (ATRAC3) - www.minidisc.org/atrac3_article.pdf,
ACM decoder uploaded, needs some fine-tuning to work
-> RealAudio 8
COOK/COKR - Real Cooker -> RealAudio G2
Video codecs: (supported by RealPlayer8 for Linux)
RV10 - H.263 based, working with libavcodec's decoder
RV20-RV40 - using RealPlayer's codec plugins
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
#include "bswap.h"
//#define mp_dbg(mod,lev, args... ) mp_msg_c((mod<<8)|lev, ## args )
#define MKTAG(a, b, c, d) (a | (b << 8) | (c << 16) | (d << 24))
#define MAX_STREAMS 32
typedef struct {
int timestamp;
int offset;
int packetno;
int len; /* only filled by our index generator */
int flags; /* only filled by our index generator */
} real_index_table_t;
typedef struct {
/* for seeking */
int index_chunk_offset;
real_index_table_t *index_table[MAX_STREAMS];
// int *index_table[MAX_STREAMS];
int index_table_size[MAX_STREAMS];
int data_chunk_offset;
int num_of_packets;
int current_packet;
int current_apacket;
int current_vpacket;
// timestamp correction:
int kf_pts; // timestamp of next video keyframe
int a_pts; // previous audio timestamp
float v_pts; // previous video timestamp
/* stream id table */
// int last_a_stream;
// int a_streams[MAX_STREAMS];
// int last_v_stream;
// int v_streams[MAX_STREAMS];
} real_priv_t;
/* originally from FFmpeg */
static void get_str(int isbyte, demuxer_t *demuxer, char *buf, int buf_size)
{
int len;
if (isbyte)
len = stream_read_char(demuxer->stream);
else
len = stream_read_word(demuxer->stream);
stream_read(demuxer->stream, buf, (len > buf_size) ? buf_size : len);
if (len > buf_size)
stream_skip(demuxer->stream, len-buf_size);
printf("read_str: %d bytes read\n", len);
}
static void skip_str(int isbyte, demuxer_t *demuxer)
{
int len;
if (isbyte)
len = stream_read_char(demuxer->stream);
else
len = stream_read_word(demuxer->stream);
stream_skip(demuxer->stream, len);
printf("skip_str: %d bytes skipped\n", len);
}
static void dump_index(demuxer_t *demuxer, int stream_id)
{
real_priv_t *priv = demuxer->priv;
real_index_table_t *index;
int i, entries;
if (verbose<=0)
return;
if (stream_id > MAX_STREAMS)
return;
index = priv->index_table[stream_id];
entries = priv->index_table_size[stream_id];
printf("Index table for stream %d\n", stream_id);
for (i = 0; i < entries; i++)
{
printf("packetno: %x pos: %x len: %x timestamp: %x flags: %x\n",
index[i].packetno, index[i].offset, index[i].len, index[i].timestamp,
index[i].flags);
}
}
static int parse_index_chunk(demuxer_t *demuxer)
{
real_priv_t *priv = demuxer->priv;
int origpos = stream_tell(demuxer->stream);
int next_header_pos = priv->index_chunk_offset;
int i, entries, stream_id;
read_index:
stream_seek(demuxer->stream, next_header_pos);
i = stream_read_dword_le(demuxer->stream);
if ((i == -256) || (i != MKTAG('I', 'N', 'D', 'X')))
{
printf("Something went wrong, no index chunk found on given address (%d)\n",
next_header_pos);
goto end;
}
printf("Reading index table from index chunk (%d)\n",
next_header_pos);
i = stream_read_dword(demuxer->stream);
printf("size: %d bytes\n", i);
i = stream_read_word(demuxer->stream);
if (i != 0)
printf("Hmm, index table with unknown version (%d), please report it to MPlayer developers!\n", i);
entries = stream_read_dword(demuxer->stream);
printf("entries: %d\n", entries);
stream_id = stream_read_word(demuxer->stream);
printf("stream_id: %d\n", stream_id);
next_header_pos = stream_read_dword(demuxer->stream);
printf("next_header_pos: %d\n", next_header_pos);
if (entries <= 0)
{
if (next_header_pos)
goto read_index;
i = entries;
goto end;
}
priv->index_table_size[stream_id] = entries;
priv->index_table[stream_id] = malloc(priv->index_table_size[stream_id] * sizeof(real_index_table_t));
for (i = 0; i < entries; i++)
{
stream_skip(demuxer->stream, 2); /* version */
priv->index_table[stream_id][i].timestamp = stream_read_dword(demuxer->stream);
priv->index_table[stream_id][i].offset = stream_read_dword(demuxer->stream);
priv->index_table[stream_id][i].packetno = stream_read_dword(demuxer->stream);
// printf("Index table: Stream#%d: entry: %d: pos: %d\n",
// stream_id, i, priv->index_table[stream_id][i].offset);
}
dump_index(demuxer, stream_id);
if (next_header_pos > 0)
goto read_index;
end:
demuxer->seekable = 1; /* got index, we're able to seek */
if (i == -256)
stream_reset(demuxer->stream);
stream_seek(demuxer->stream, origpos);
if (i == -256)
return 0;
else
return 1;
}
static int generate_index(demuxer_t *demuxer)
{
real_priv_t *priv = demuxer->priv;
int origpos = stream_tell(demuxer->stream);
int data_pos = priv->data_chunk_offset-10;
int num_of_packets = 0;
int i, entries = 0;
int len, stream_id = 0, timestamp, flags;
int tab_pos = 0;
read_index:
stream_seek(demuxer->stream, data_pos);
i = stream_read_dword_le(demuxer->stream);
if ((i == -256) || (i != MKTAG('D', 'A', 'T', 'A')))
{
printf("Something went wrong, no data chunk found on given address (%d)\n",
data_pos);
goto end;
}
stream_skip(demuxer->stream, 4); /* chunk size */
stream_skip(demuxer->stream, 2); /* version */
num_of_packets = stream_read_dword(demuxer->stream);
printf("Generating index table from raw data (pos: 0x%x) for %d packets\n",
data_pos, num_of_packets);
data_pos = stream_read_dword_le(demuxer->stream)-10; /* next data chunk */
for (i = 0; i < MAX_STREAMS; i++)
{
priv->index_table_size[i] = num_of_packets;
priv->index_table[i] = malloc(priv->index_table_size[i] * sizeof(real_index_table_t));
// priv->index_table[stream_id] = realloc(priv->index_table[stream_id],
// priv->index_table_size[stream_id] * sizeof(real_index_table_t));
}
tab_pos = 0;
// memset(priv->index_table_size, 0, sizeof(int)*MAX_STREAMS);
// memset(priv->index_table, 0, sizeof(real_index_table_t)*MAX_STREAMS);
while (tab_pos < num_of_packets)
{
i = stream_read_char(demuxer->stream);
if (i == -256)
goto end;
stream_skip(demuxer->stream, 1);
// stream_skip(demuxer->stream, 2); /* version */
len = stream_read_word(demuxer->stream);
stream_id = stream_read_word(demuxer->stream);
timestamp = stream_read_dword(demuxer->stream);
stream_skip(demuxer->stream, 1); /* reserved */
flags = stream_read_char(demuxer->stream);
i = tab_pos;
// priv->index_table_size[stream_id] = i;
// if (priv->index_table[stream_id] == NULL)
// priv->index_table[stream_id] = malloc(priv->index_table_size[stream_id] * sizeof(real_index_table_t));
// else
// priv->index_table[stream_id] = realloc(priv->index_table[stream_id],
// priv->index_table_size[stream_id] * sizeof(real_index_table_t));
priv->index_table[stream_id][i].timestamp = timestamp;
priv->index_table[stream_id][i].offset = stream_tell(demuxer->stream)-12;
priv->index_table[stream_id][i].len = len;
priv->index_table[stream_id][i].packetno = entries;
priv->index_table[stream_id][i].flags = flags;
tab_pos++;
/* skip data */
stream_skip(demuxer->stream, len-12);
}
dump_index(demuxer, stream_id);
if (data_pos)
goto read_index;
end:
demuxer->seekable = 1; /* got index, we're able to seek */
if (i == -256)
stream_reset(demuxer->stream);
stream_seek(demuxer->stream, origpos);
if (i == -256)
return 0;
else
return 1;
}
int real_check_file(demuxer_t* demuxer)
{
real_priv_t *priv;
int c;
mp_msg(MSGT_DEMUX,MSGL_V,"Checking for REAL\n");
c = stream_read_dword_le(demuxer->stream);
if (c == -256)
return 0; /* EOF */
if (c != MKTAG('.', 'R', 'M', 'F'))
return 0; /* bad magic */
priv = malloc(sizeof(real_priv_t));
memset(priv, 0, sizeof(real_priv_t));
demuxer->priv = priv;
return 1;
}
void hexdump(char *, unsigned long);
static float real_fix_timestamp(real_priv_t* priv, unsigned char* s, int timestamp, float frametime, unsigned int format){
float v_pts;
int kf=timestamp;
if(format==0x30335652){ // RV30 timestamps:
kf=2*(((s[1]&15)<<8)+s[2]); // 12-bit timestamp from frame header
//kf=((s[1]<<8)+s[2])>>3; // 12-bit timestamp from frame header
if(verbose>1) printf("\nTS: %08X (%04X) %02X %02X %02X %02X\n",timestamp,kf,s[0],s[1],s[2],s[3]);
kf|=timestamp&(~0x1fff); // combine with packet timestamp
if(kf<timestamp-4096) kf+=8192; else // workaround wrap-around problems
if(kf>timestamp+4096) kf-=8192;
if(!(s[0]&0x8) || !(s[0]&0x10)){ // P || I frame -> swap timestamps
int tmp=kf;
kf=priv->kf_pts;
priv->kf_pts=tmp;
// if(kf<=tmp) kf=0;
}
}
v_pts=kf*0.001f;
if(v_pts<priv->v_pts || !kf) v_pts=priv->v_pts+frametime;
priv->v_pts=v_pts;
// printf("\n#T# %5d/%5d (%5.3f) %5.3f \n",kf,timestamp,frametime,v_pts);
return v_pts;
}
typedef struct dp_hdr_s {
uint32_t chunks; // number of chunks
uint32_t timestamp; // timestamp from packet header
uint32_t len; // length of actual data
uint32_t chunktab; // offset to chunk offset array
} dp_hdr_t;
// return value:
// 0 = EOF or no stream found
// 1 = successfully read a packet
int demux_real_fill_buffer(demuxer_t *demuxer)
{
real_priv_t *priv = demuxer->priv;
demux_stream_t *ds = NULL;
int len;
int timestamp;
int stream_id;
#ifdef CRACK_MATRIX
int i;
#endif
int flags;
int version;
int reserved;
while(1){
/* also don't check if no num_of_packets was defined in header */
if ((priv->current_packet > priv->num_of_packets) &&
(priv->num_of_packets != -10)){
printf("num_of_packets reached!\n");
return 0; /* EOF */
}
demuxer->filepos = stream_tell(demuxer->stream);
version = stream_read_word(demuxer->stream); /* version */
len = stream_read_word(demuxer->stream);
if (len == -256){ /* EOF */
// printf("len==-256!\n");
return 0;
}
if (len < 12){
printf("%08X: packet v%d len=%d \n",(int)demuxer->filepos,(int)version,(int)len);
printf("bad packet len (%d)\n", len);
stream_skip(demuxer->stream, len);
continue; //goto loop;
}
stream_id = stream_read_word(demuxer->stream);
timestamp = stream_read_dword(demuxer->stream);
reserved = stream_read_char(demuxer->stream);
flags = stream_read_char(demuxer->stream);
/* flags: */
/* 0x1 - reliable */
/* 0x2 - keyframe */
// printf("%08X: packet v%d len=%4d id=%d pts=%6d rvd=%d flags=%d \n",
// (int)demuxer->filepos,(int)version,(int)len, stream_id,
// (int) timestamp, reserved, flags);
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "len:%d\n", len);
mp_dbg(MSGT_DEMUX,MSGL_V, "\npacket#%d: pos: 0x%0x, len: %d, id: %d, pts: %d, flags: %x rvd:%d\n",
priv->current_packet, (int)demuxer->filepos, len, stream_id, timestamp, flags, reserved);
priv->current_packet++;
len -= 12;
// printf("s_id=%d aid=%d vid=%d \n",stream_id,demuxer->audio->id,demuxer->video->id);
/* check stream_id: */
if(demuxer->audio->id==stream_id){
got_audio:
ds=demuxer->audio;
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "packet is audio (id: %d)\n", stream_id);
// parse audio chunk:
{
#ifdef CRACK_MATRIX
int spos=stream_tell(demuxer->stream);
static int cnt=0;
static int cnt2=CRACK_MATRIX;
#endif
demux_packet_t *dp = new_demux_packet(len);
stream_read(demuxer->stream, dp->buffer, len);
#ifdef CRACK_MATRIX
printf("*** audio block len=%d\n",len);
{ // HACK - used for reverse engineering the descrambling matrix
FILE* f=fopen("test.rm","r+");
fseek(f,spos,SEEK_SET);
++cnt;
// for(i=0;i<len;i++) dp->buffer[i]=i/0x12;
// for(i=0;i<len;i++) dp->buffer[i]=i;
// for(i=0;i<len;i++) dp->buffer[i]=cnt;
// for(i=0;i<len;i++) dp->buffer[i]=cnt<<4;
for(i=0;i<len;i++) dp->buffer[i]=(i==cnt2) ? (cnt+16*(8+cnt)) : 0;
if(cnt==6){ cnt=0; ++cnt2; }
fwrite(dp->buffer, len, 1, f);
fclose(f);
if(cnt2>0x150) *((int*)NULL)=1; // sig11 :)
}
#endif
if( ((sh_audio_t *)ds->sh)->format == 0x2000) {
// if DNET, swap bytes, as DNET is byte-swapped AC3:
char *ptr = dp->buffer;
int i;
for (i = 0; i < len; i += 2)
{
const char tmp = ptr[0];
ptr[0] = ptr[1];
ptr[1] = tmp;
ptr += 2;
}
}
dp->pts = (priv->a_pts==timestamp) ? 0 : (timestamp/1000.0f);
priv->a_pts=timestamp;
dp->pos = demuxer->filepos;
dp->flags = (flags & 0x2) ? 0x10 : 0;
ds_add_packet(ds, dp);
}
return 1;
}
if(demuxer->video->id==stream_id){
got_video:
ds=demuxer->video;
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "packet is video (id: %d)\n", stream_id);
// parse video chunk:
{
// we need a more complicated, 2nd level demuxing, as the video
// frames are stored fragmented in the video chunks :(
sh_video_t *sh_video = ds->sh;
demux_packet_t *dp;
int vpkg_header, vpkg_length, vpkg_offset;
int vpkg_seqnum=-1;
int vpkg_subseq=0;
while(len>2){
dp_hdr_t* dp_hdr;
unsigned char* dp_data;
uint32_t* extra;
// printf("xxx len=%d \n",len);
// read packet header
// bit 7: 1=last block in block chain
// bit 6: 1=short header (only one block?)
vpkg_header=stream_read_char(demuxer->stream); --len;
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "hdr: %0.2X (len=%d) ",vpkg_header,len);
if (0x40==(vpkg_header&0xc0)) {
// seems to be a very short header
// 2 bytes, purpose of the second byte yet unknown
int bummer;
bummer=stream_read_char(demuxer->stream); --len;
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "%0.2X",bummer);
vpkg_offset=0;
vpkg_length=len;
} else {
if (0==(vpkg_header&0x40)) {
// sub-seqnum (bits 0-6: number of fragment. bit 7: ???)
vpkg_subseq=stream_read_char(demuxer->stream);
--len;
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "subseq: %0.2X ",vpkg_subseq);
vpkg_subseq&=0x7f;
}
// size of the complete packet
// bit 14 is always one (same applies to the offset)
vpkg_length=stream_read_word(demuxer->stream);
len-=2;
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "l: %0.2X %0.2X ",vpkg_length>>8,vpkg_length&0xff);
if (!(vpkg_length&0xC000)) {
vpkg_length<<=16;
vpkg_length|=stream_read_word(demuxer->stream);
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "l+: %0.2X %0.2X ",(vpkg_length>>8)&0xff,vpkg_length&0xff);
len-=2;
} else
vpkg_length&=0x3fff;
// offset of the following data inside the complete packet
// Note: if (hdr&0xC0)==0x80 then offset is relative to the
// _end_ of the packet, so it's equal to fragment size!!!
vpkg_offset=stream_read_word(demuxer->stream);
len-=2;
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "o: %0.2X %0.2X ",vpkg_offset>>8,vpkg_offset&0xff);
if (!(vpkg_offset&0xC000)) {
vpkg_offset<<=16;
vpkg_offset|=stream_read_word(demuxer->stream);
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "o+: %0.2X %0.2X ",(vpkg_offset>>8)&0xff,vpkg_offset&0xff);
len-=2;
} else
vpkg_offset&=0x3fff;
vpkg_seqnum=stream_read_char(demuxer->stream); --len;
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "seq: %0.2X ",vpkg_seqnum);
}
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "\n");
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "blklen=%d\n", len);
mp_msg(MSGT_DEMUX,MSGL_DBG2, "block: hdr=0x%0x, len=%d, offset=%d, seqnum=%d\n",
vpkg_header, vpkg_length, vpkg_offset, vpkg_seqnum);
if(ds->asf_packet){
dp=ds->asf_packet;
dp_hdr=(dp_hdr_t*)dp->buffer;
dp_data=dp->buffer+sizeof(dp_hdr_t);
extra=(uint32_t*)(dp->buffer+dp_hdr->chunktab);
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "we have an incomplete packet (oldseq=%d new=%d)\n",ds->asf_seq,vpkg_seqnum);
// we have an incomplete packet:
if(ds->asf_seq!=vpkg_seqnum){
// this fragment is for new packet, close the old one
mp_msg(MSGT_DEMUX,MSGL_DBG2, "closing probably incomplete packet, len: %d \n",dp->len);
dp->pts=(dp_hdr->len<3)?0:
real_fix_timestamp(priv,dp_data,dp_hdr->timestamp,sh_video->frametime,sh_video->format);
ds_add_packet(ds,dp);
ds->asf_packet=NULL;
} else {
// append data to it!
++dp_hdr->chunks;
mp_msg(MSGT_DEMUX,MSGL_DBG2,"[chunks=%d subseq=%d]\n",dp_hdr->chunks,vpkg_subseq);
if(dp_hdr->chunktab+8*(1+dp_hdr->chunks)>dp->len){
// increase buffer size, this should not happen!
mp_msg(MSGT_DEMUX,MSGL_WARN, "chunktab buffer too small!!!!!\n");
dp->len=dp_hdr->chunktab+8*(4+dp_hdr->chunks);
dp->buffer=realloc(dp->buffer,dp->len);
// re-calc pointers:
dp_hdr=(dp_hdr_t*)dp->buffer;
dp_data=dp->buffer+sizeof(dp_hdr_t);
extra=(uint32_t*)(dp->buffer+dp_hdr->chunktab);
}
extra[2*dp_hdr->chunks+0]=1;
extra[2*dp_hdr->chunks+1]=dp_hdr->len;
if(0x80==(vpkg_header&0xc0)){
// last fragment!
if(dp_hdr->len!=vpkg_length-vpkg_offset)
mp_msg(MSGT_DEMUX,MSGL_V,"warning! assembled.len=%d frag.len=%d total.len=%d \n",dp->len,vpkg_offset,vpkg_length-vpkg_offset);
stream_read(demuxer->stream, dp_data+dp_hdr->len, vpkg_offset);
if(dp_data[dp_hdr->len]&0x20) --dp_hdr->chunks; else
dp_hdr->len+=vpkg_offset;
len-=vpkg_offset;
mp_dbg(MSGT_DEMUX,MSGL_DBG2, "fragment (%d bytes) appended, %d bytes left\n",vpkg_offset,len);
// we know that this is the last fragment -> we can close the packet!
dp->pts=(dp_hdr->len<3)?0:
real_fix_timestamp(priv,dp_data,dp_hdr->timestamp,sh_video->frametime,sh_video->format);
ds_add_packet(ds,dp);
ds->asf_packet=NULL;
// continue parsing
continue;
}
// non-last fragment:
if(dp_hdr->len!=vpkg_offset)
mp_msg(MSGT_DEMUX,MSGL_V,"warning! assembled.len=%d offset=%d frag.len=%d total.len=%d \n",dp->len,vpkg_offset,len,vpkg_length);
stream_read(demuxer->stream, dp_data+dp_hdr->len, len);
if(dp_data[dp_hdr->len]&0x20) --dp_hdr->chunks; else
dp_hdr->len+=len;
len=0;
break; // no more fragments in this chunk!
}
}
// create new packet!
dp = new_demux_packet(sizeof(dp_hdr_t)+vpkg_length+8*(1+2*(vpkg_header&0x3F)));
// the timestamp seems to be in milliseconds
dp->pts = 0; // timestamp/1000.0f; //timestamp=0;
dp->pos = demuxer->filepos;
dp->flags = (flags & 0x2) ? 0x10 : 0;
ds->asf_seq = vpkg_seqnum;
dp_hdr=(dp_hdr_t*)dp->buffer;
dp_hdr->chunks=0;
dp_hdr->timestamp=timestamp;
dp_hdr->chunktab=sizeof(dp_hdr_t)+vpkg_length;
dp_data=dp->buffer+sizeof(dp_hdr_t);
extra=(uint32_t*)(dp->buffer+dp_hdr->chunktab);
extra[0]=1; extra[1]=0; // offset of the first chunk
if(0x00==(vpkg_header&0xc0)){
// first fragment:
dp_hdr->len=len;
stream_read(demuxer->stream, dp_data, len);
ds->asf_packet=dp;
len=0;
break;
}
// whole packet (not fragmented):
dp_hdr->len=vpkg_length; len-=vpkg_length;
stream_read(demuxer->stream, dp_data, vpkg_length);
dp->pts=(dp_hdr->len<3)?0:
real_fix_timestamp(priv,dp_data,dp_hdr->timestamp,sh_video->frametime,sh_video->format);
ds_add_packet(ds,dp);
} // while(len>0)
if(len){
printf("\n******** !!!!!!!! BUG!! len=%d !!!!!!!!!!! ********\n",len);
if(len>0) stream_skip(demuxer->stream, len);
}
}
return 1;
}
if(demuxer->audio->id==-1 && demuxer->a_streams[stream_id]){
sh_audio_t *sh = demuxer->a_streams[stream_id];
demuxer->audio->id=stream_id;
sh->ds=demuxer->audio;
demuxer->audio->sh=sh;
mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected RM audio ID = %d\n",stream_id);
goto got_audio;
}
if(demuxer->video->id==-1 && demuxer->v_streams[stream_id]){
sh_video_t *sh = demuxer->v_streams[stream_id];
demuxer->video->id=stream_id;
sh->ds=demuxer->video;
demuxer->video->sh=sh;
mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected RM video ID = %d\n",stream_id);
goto got_video;
}
mp_msg(MSGT_DEMUX,MSGL_DBG2, "unknown stream id (%d)\n", stream_id);
stream_skip(demuxer->stream, len);
}// goto loop;
}
extern void print_wave_header(WAVEFORMATEX *h);
void demux_open_real(demuxer_t* demuxer)
{
real_priv_t* priv = demuxer->priv;
int num_of_headers;
int a_streams=0;
int v_streams=0;
int i;
stream_skip(demuxer->stream, 4); /* header size */
stream_skip(demuxer->stream, 2); /* version */
// stream_skip(demuxer->stream, 4);
i = stream_read_dword(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V, "real: File version: %d\n", i);
num_of_headers = stream_read_dword(demuxer->stream);
// stream_skip(demuxer->stream, 4); /* number of headers */
/* parse chunks */
for (i = 1; i < num_of_headers; i++)
{
int chunk_id, chunk_pos, chunk_size;
chunk_pos = stream_tell(demuxer->stream);
chunk_id = stream_read_dword_le(demuxer->stream);
chunk_size = stream_read_dword(demuxer->stream);
stream_skip(demuxer->stream, 2); /* version */
mp_msg(MSGT_DEMUX,MSGL_V, "Chunk: %.4s (%x) (size: 0x%x, offset: 0x%x)\n",
(char *)&chunk_id, chunk_id, chunk_size, chunk_pos);
if (chunk_size < 10){
mp_msg(MSGT_DEMUX,MSGL_ERR,"demux_real: invalid chunksize! (%d)\n",chunk_size);
return;
}
switch(chunk_id)
{
case MKTAG('P', 'R', 'O', 'P'):
/* Properties header */
stream_skip(demuxer->stream, 4); /* max bitrate */
stream_skip(demuxer->stream, 4); /* avg bitrate */
stream_skip(demuxer->stream, 4); /* max packet size */
stream_skip(demuxer->stream, 4); /* avg packet size */
stream_skip(demuxer->stream, 4); /* nb packets */
stream_skip(demuxer->stream, 4); /* duration */
stream_skip(demuxer->stream, 4); /* preroll */
priv->index_chunk_offset = stream_read_dword(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"First index chunk offset: 0x%x\n", priv->index_chunk_offset);
priv->data_chunk_offset = stream_read_dword(demuxer->stream)+10;
mp_msg(MSGT_DEMUX,MSGL_V,"First data chunk offset: 0x%x\n", priv->data_chunk_offset);
stream_skip(demuxer->stream, 2); /* nb streams */
#if 0
stream_skip(demuxer->stream, 2); /* flags */
#else
{
int flags = stream_read_word(demuxer->stream);
if (flags)
{
mp_msg(MSGT_DEMUX,MSGL_V,"Flags (%x): ", flags);
if (flags & 0x1)
mp_msg(MSGT_DEMUX,MSGL_V,"[save allowed] ");
if (flags & 0x2)
mp_msg(MSGT_DEMUX,MSGL_V,"[perfect play (more buffers)] ");
if (flags & 0x4)
mp_msg(MSGT_DEMUX,MSGL_V,"[live broadcast] ");
mp_msg(MSGT_DEMUX,MSGL_V,"\n");
}
}
#endif
break;
case MKTAG('C', 'O', 'N', 'T'):
{
/* Content description header */
char *buf;
int len;
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
buf[len] = 0;
demux_info_add(demuxer, "name", buf);
free(buf);
}
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
buf[len] = 0;
demux_info_add(demuxer, "author", buf);
free(buf);
}
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
buf[len] = 0;
demux_info_add(demuxer, "copyright", buf);
free(buf);
}
len = stream_read_word(demuxer->stream);
if (len > 0)
{
buf = malloc(len+1);
stream_read(demuxer->stream, buf, len);
buf[len] = 0;
demux_info_add(demuxer, "comment", buf);
free(buf);
}
break;
}
case MKTAG('M', 'D', 'P', 'R'):
{
/* Media properties header */
int stream_id;
int bitrate;
int codec_data_size;
int codec_pos;
int tmp;
stream_id = stream_read_word(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"Found new stream (id: %d)\n", stream_id);
stream_skip(demuxer->stream, 4); /* max bitrate */
bitrate = stream_read_dword(demuxer->stream); /* avg bitrate */
stream_skip(demuxer->stream, 4); /* max packet size */
stream_skip(demuxer->stream, 4); /* avg packet size */
stream_skip(demuxer->stream, 4); /* start time */
stream_skip(demuxer->stream, 4); /* preroll */
stream_skip(demuxer->stream, 4); /* duration */
skip_str(1, demuxer); /* stream description (name) */
skip_str(1, demuxer); /* mimetype */
/* Type specific header */
codec_data_size = stream_read_dword(demuxer->stream);
codec_pos = stream_tell(demuxer->stream);
tmp = stream_read_dword(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_DBG2,"demux_real: type_spec: len=%d fpos=0x%X first_dword=0x%X (%.4s) \n",
(int)codec_data_size,(int)codec_pos,tmp,&tmp);
#if 1
// skip unknown shit - FIXME: find a better/cleaner way!
{ int len=codec_data_size;
while(--len>=8){
if(tmp==MKTAG(0xfd, 'a', 'r', '.')) break; // audio
if(tmp==MKTAG('O', 'D', 'I', 'V')) break; // video
tmp=(tmp<<8)|stream_read_char(demuxer->stream);
}
}
#endif
#ifdef MP_DEBUG
#define stream_skip(st,siz) { int i; for(i=0;i<siz;i++) mp_msg(MSGT_DEMUX,MSGL_V," %02X",stream_read_char(st)); mp_msg(MSGT_DEMUX,MSGL_V,"\n");}
#endif
if (tmp == MKTAG(0xfd, 'a', 'r', '.'))
{
/* audio header */
sh_audio_t *sh = new_sh_audio(demuxer, stream_id);
char buf[128]; /* for codec name */
int frame_size;
int sub_packet_size;
int sub_packet_h;
int version;
int flavor;
int coded_frame_size;
int codecdata_length;
mp_msg(MSGT_DEMUX,MSGL_V,"Found audio stream!\n");
version = stream_read_word(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"version: %d\n", version);
// stream_skip(demuxer->stream, 2); /* version (4 or 5) */
stream_skip(demuxer->stream, 2); // 00 00
stream_skip(demuxer->stream, 4); /* .ra4 or .ra5 */
stream_skip(demuxer->stream, 4); // ???
stream_skip(demuxer->stream, 2); /* version (4 or 5) */
stream_skip(demuxer->stream, 4); // header size == 0x4E
flavor = stream_read_word(demuxer->stream);/* codec flavor id */
coded_frame_size = stream_read_dword(demuxer->stream);/* needed by codec */
//stream_skip(demuxer->stream, 4); /* coded frame size */
stream_skip(demuxer->stream, 4); // big number
stream_skip(demuxer->stream, 4); // bigger number
stream_skip(demuxer->stream, 4); // 2 || -''-
// stream_skip(demuxer->stream, 2); // 0x10
sub_packet_h = stream_read_word(demuxer->stream);
// stream_skip(demuxer->stream, 2); /* coded frame size */
frame_size = stream_read_word(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"frame_size: %d\n", frame_size);
sub_packet_size = stream_read_word(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"sub_packet_size: %d\n", sub_packet_size);
stream_skip(demuxer->stream, 2); // 0
if (version == 5)
stream_skip(demuxer->stream, 6); //0,srate,0
sh->samplerate = stream_read_word(demuxer->stream);
stream_skip(demuxer->stream, 2); // 0
sh->samplesize = stream_read_word(demuxer->stream)/8;
sh->channels = stream_read_word(demuxer->stream);
mp_msg(MSGT_DEMUX,MSGL_V,"samplerate: %d, channels: %d\n",
sh->samplerate, sh->channels);
if (version == 5)
{
stream_skip(demuxer->stream, 4); // "genr"
stream_read(demuxer->stream, buf, 4); // fourcc
buf[4] = 0;
}
else
{
/* Desc #1 */
skip_str(1, demuxer);
/* Desc #2 */
get_str(1, demuxer, buf, sizeof(buf));
}
/* Emulate WAVEFORMATEX struct: */
sh->wf = malloc(sizeof(WAVEFORMATEX));
memset(sh->wf, 0, sizeof(WAVEFORMATEX));
sh->wf->nChannels = sh->channels;
sh->wf->wBitsPerSample = sh->samplesize*8;
sh->wf->nSamplesPerSec = sh->samplerate;
sh->wf->nAvgBytesPerSec = bitrate;
sh->wf->nBlockAlign = frame_size;
sh->wf->cbSize = 0;
sh->format = MKTAG(buf[0], buf[1], buf[2], buf[3]);
switch (sh->format){
case MKTAG('d', 'n', 'e', 't'):
mp_msg(MSGT_DEMUX,MSGL_V,"Audio: DNET (AC3 with low-bitrate extension)\n");
break;
case MKTAG('s', 'i', 'p', 'r'):
mp_msg(MSGT_DEMUX,MSGL_V,"Audio: SiproLab's ACELP.net\n");
break;
case MKTAG('c', 'o', 'o', 'k'):
mp_msg(MSGT_DEMUX,MSGL_V,"Audio: Real's GeneralCooker (?) (RealAudio G2?) (unsupported)\n");
break;
case MKTAG('a', 't', 'r', 'c'):
mp_msg(MSGT_DEMUX,MSGL_V,"Audio: Sony ATRAC3 (RealAudio 8) (unsupported)\n");
break;
default:
mp_msg(MSGT_DEMUX,MSGL_V,"Audio: Unknown (%s)\n", buf);
}
switch (sh->format)
{
case MKTAG('d', 'n', 'e', 't'):
mp_msg(MSGT_DEMUX,MSGL_V,"Audio: DNET -> AC3\n");
sh->format = 0x2000;
break;
case MKTAG('s', 'i', 'p', 'r'):
#if 0
sh->format = 0x130;
/* for buggy directshow loader */
sh->wf->cbSize = 4;
sh->wf = realloc(sh->wf, sizeof(WAVEFORMATEX)+sh->wf->cbSize);
sh->wf->wBitsPerSample = 0;
sh->wf->nAvgBytesPerSec = 1055;
sh->wf->nBlockAlign = 19;
// sh->wf->nBlockAlign = frame_size / 288;
buf[0] = 30;
buf[1] = 1;
buf[2] = 1;
buf[3] = 0;
memcpy((sh->wf+18), (char *)&buf[0], 4);
// sh->wf[sizeof(WAVEFORMATEX)+1] = 30;
// sh->wf[sizeof(WAVEFORMATEX)+2] = 1;
// sh->wf[sizeof(WAVEFORMATEX)+3] = 1;
// sh->wf[sizeof(WAVEFORMATEX)+4] = 0;
break;
#endif
case MKTAG('a', 't', 'r', 'c'):
#if 0
sh->format = 0x270;
/* 14 bytes extra header needed ! */
sh->wf->cbSize = 14;
sh->wf = realloc(sh->wf, sizeof(WAVEFORMATEX)+sh->wf->cbSize);
sh->wf->nAvgBytesPerSec = 16537; // 8268
sh->wf->nBlockAlign = 384; // 192
sh->wf->wBitsPerSample = 0; /* from AVI created by VirtualDub */
break;
#endif
case MKTAG('c', 'o', 'o', 'k'):
// realaudio codec plugins - common:
// sh->wf->cbSize = 4+2+24;
stream_skip(demuxer->stream,3); // Skip 3 unknown bytes
if (version==5)
stream_skip(demuxer->stream,1); // Skip 1 additional unknown byte
codecdata_length=stream_read_dword(demuxer->stream);
sh->wf->cbSize = 10+codecdata_length;
sh->wf = realloc(sh->wf, sizeof(WAVEFORMATEX)+sh->wf->cbSize);
((short*)(sh->wf+1))[0]=sub_packet_size;
((short*)(sh->wf+1))[1]=sub_packet_h;
((short*)(sh->wf+1))[2]=flavor;
((short*)(sh->wf+1))[3]=coded_frame_size;
((short*)(sh->wf+1))[4]=codecdata_length;
// stream_read(demuxer->stream, ((char*)(sh->wf+1))+6, 24); // extras
stream_read(demuxer->stream, ((char*)(sh->wf+1))+10, codecdata_length); // extras
break;
default:
mp_msg(MSGT_DEMUX,MSGL_V,"Audio: Unknown (%s)\n", buf);
}
sh->wf->wFormatTag = sh->format;
print_wave_header(sh->wf);
if(demuxer->audio->id==stream_id){
demuxer->audio->id=stream_id;
sh->ds=demuxer->audio;
demuxer->audio->sh=sh;
}
++a_streams;
#ifdef stream_skip
#undef stream_skip
#endif
}
else
// case MKTAG('V', 'I', 'D', 'O'):
if(tmp == MKTAG('O', 'D', 'I', 'V'))
{
/* video header */
sh_video_t *sh = new_sh_video(demuxer, stream_id);
sh->format = stream_read_dword_le(demuxer->stream); /* fourcc */
mp_msg(MSGT_DEMUX,MSGL_V,"video fourcc: %.4s (%x)\n", (char *)&sh->format, sh->format);
/* emulate BITMAPINFOHEADER */
sh->bih = malloc(sizeof(BITMAPINFOHEADER)+8);
memset(sh->bih, 0, sizeof(BITMAPINFOHEADER)+8);
sh->bih->biSize = 48;
sh->disp_w = sh->bih->biWidth = stream_read_word(demuxer->stream);
sh->disp_h = sh->bih->biHeight = stream_read_word(demuxer->stream);
sh->bih->biPlanes = 1;
sh->bih->biBitCount = 24;
sh->bih->biCompression = sh->format;
sh->bih->biSizeImage= sh->bih->biWidth*sh->bih->biHeight*3;
sh->fps = stream_read_word(demuxer->stream);
sh->frametime = 1.0f/sh->fps;
#if 1
stream_skip(demuxer->stream, 4);
#else
printf("unknown1: 0x%X \n",stream_read_dword(demuxer->stream));
printf("unknown2: 0x%X \n",stream_read_word(demuxer->stream));
printf("unknown3: 0x%X \n",stream_read_word(demuxer->stream));
#endif
if (sh->format==0x30335652 ||
sh->format==0x30325652 ) {
sh->fps = stream_read_word(demuxer->stream);
sh->frametime = 1.0f/sh->fps;
} else {
int fps=stream_read_word(demuxer->stream);
printf("realvid: ignoring FPS = %d\n",fps);
}
stream_skip(demuxer->stream, 2);
// read codec sub-format (to make difference between low and high rate codec)
((unsigned int*)(sh->bih+1))[0]=stream_read_dword(demuxer->stream);
/* h263 hack */
tmp = stream_read_dword(demuxer->stream);
((unsigned int*)(sh->bih+1))[1]=tmp;
mp_msg(MSGT_DEMUX,MSGL_V,"H.263 ID: %x\n", tmp);
switch (tmp)
{
case 0x10000000:
/* sub id: 0 */
/* codec id: rv10 */
break;
case 0x10003000:
case 0x10003001:
/* sub id: 3 */
/* codec id: rv10 */
sh->bih->biCompression = sh->format = mmioFOURCC('R', 'V', '1', '3');
break;
case 0x20001000:
case 0x20100001:
case 0x20200002:
/* codec id: rv20 */
break;
case 0x30202002:
/* codec id: rv30 */
break;
case 0x40000000:
/* codec id: rv40 */
break;
default:
/* codec id: none */
mp_msg(MSGT_DEMUX,MSGL_V,"unknown id: %x\n", tmp);
}
if(demuxer->video->id==stream_id){
demuxer->video->id=stream_id;
sh->ds=demuxer->video;
demuxer->video->sh=sh;
}
++v_streams;
}
else {
mp_msg(MSGT_DEMUX, MSGL_ERR, "Not audio/video stream or unsupported!\n");
}
// break;
// default:
//skip_this_chunk:
/* skip codec info */
tmp = stream_tell(demuxer->stream) - codec_pos;
mp_msg(MSGT_DEMUX,MSGL_V,"### skipping %d bytes of codec info\n", codec_data_size - tmp);
#if 0
{ int i;
for(i=0;i<codec_data_size - tmp;i++)
printf(" %02X",stream_read_char(demuxer->stream));
printf("\n");
}
#else
stream_skip(demuxer->stream, codec_data_size - tmp);
#endif
break;
// }
}
case MKTAG('D', 'A', 'T', 'A'):
goto header_end;
case MKTAG('I', 'N', 'D', 'X'):
default:
mp_msg(MSGT_DEMUX,MSGL_V,"Unknown chunk: %x\n", chunk_id);
stream_skip(demuxer->stream, chunk_size - 10);
break;
}
}
header_end:
priv->num_of_packets = stream_read_dword(demuxer->stream);
// stream_skip(demuxer->stream, 4); /* number of packets */
stream_skip(demuxer->stream, 4); /* next data header */
mp_msg(MSGT_DEMUX,MSGL_V,"Packets in file: %d\n", priv->num_of_packets);
if (priv->num_of_packets == 0)
priv->num_of_packets = -10;
/* disable seeking */
demuxer->seekable = 0;
if (index_mode == 2)
generate_index(demuxer);
else if (priv->index_chunk_offset && (index_mode == 1))
parse_index_chunk(demuxer);
// detect streams:
if(demuxer->video->id==-1 && v_streams>0){
// find the valid video stream:
if(!ds_fill_buffer(demuxer->video)){
mp_msg(MSGT_DEMUXER,MSGL_INFO,"RM: " MSGTR_MissingVideoStream);
}
}
if(demuxer->audio->id==-1 && a_streams>0){
// find the valid audio stream:
if(!ds_fill_buffer(demuxer->audio)){
mp_msg(MSGT_DEMUXER,MSGL_INFO,"RM: " MSGTR_MissingAudioStream);
}
}
}
void demux_close_real(demuxer_t *demuxer)
{
real_priv_t* priv = demuxer->priv;
if (priv)
free(priv);
return;
}
/* please upload RV10 samples WITH INDEX CHUNK */
int demux_seek_real(demuxer_t *demuxer, float rel_seek_secs, int flags)
{
real_priv_t *priv = demuxer->priv;
demux_stream_t *d_audio = demuxer->audio;
demux_stream_t *d_video = demuxer->video;
sh_audio_t *sh_audio = d_audio->sh;
sh_video_t *sh_video = d_video->sh;
int vid = d_video->id, aid = d_audio->id;
int next_offset = 0;
int rel_seek_frames = 0;
int streams = 0;
if ((index_mode != 1) && (index_mode != 2))
return 0;
if (sh_video)
streams |= 1;
if (sh_audio)
streams |= 2;
// printf("streams: %d\n", streams);
if (!streams)
return 0;
if (flags & 1)
/* seek absolute */
priv->current_apacket = priv->current_vpacket = 0;
/* flags & 2 ? */
if (streams & 1)
rel_seek_frames = (int)(sh_video->fps*rel_seek_secs);
else if (streams & 2)
rel_seek_frames = (int)(rel_seek_secs);
// printf("rel_seek_frames: %d\n", rel_seek_frames);
if (streams & 2)
priv->current_apacket += rel_seek_frames;
if (streams & 1)
priv->current_vpacket += rel_seek_frames;
if (
((streams & 2) && (priv->current_apacket > priv->index_table_size[aid])) ||
((streams & 1) && (priv->current_vpacket > priv->index_table_size[vid])) )
return 0;
/* both video and audio stream */
if (streams == 3)
{
// if (priv->current_apacket > priv->current_vpacket)
// {
/* search keyframe */
while (!(priv->index_table[vid][priv->current_vpacket].flags & 0x2))
priv->current_vpacket++;
next_offset = priv->index_table[vid][priv->current_vpacket].offset;
// }
// else
// {
// next_offset = priv->index_table[aid][priv->current_apacket].offset;
// }
}
else
{
if (streams & 1)
{
/* search keyframe */
while (!(priv->index_table[vid][priv->current_vpacket].flags & 0x2))
priv->current_vpacket++;
next_offset = priv->index_table[vid][priv->current_vpacket].offset;
}
else if (streams & 2)
{
next_offset = priv->index_table[aid][priv->current_apacket].offset;
}
}
// printf("seek: pos: %d, current packets: a: %d, v: %d\n",
// next_offset, priv->current_apacket, priv->current_vpacket);
return stream_seek(demuxer->stream, next_offset);
}
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