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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.
TODO: fix the whole syncing mechanism
$Log$
Revision 1.11 2002/04/30 23:29:38 alex
completed real seeking - working very well with audio only files
Revision 1.10 2002/04/24 15:36:06 albeu
Added demuxer uninit
Revision 1.9 2002/03/15 15:51:37 alex
added PRE-ALPHA seeking ability and index table generator (like avi's one)
Revision 1.8 2002/01/23 19:41:01 alex
fixed num_of_packets and current_packet handling, bug found by Mike Melanson
Revision 1.7 2002/01/18 11:02:52 alex
fix dnet support
Revision 1.6 2002/01/04 19:32:58 alex
updated/extended some parts, based on RMFF (also initial ATRAC3 hackings and notes)
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
RV30
*/
#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 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_aid;
int current_vid;
int current_apacket;
int current_vpacket;
/* 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)
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;
}
// 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;
sh_audio_t *sh_audio = NULL;
int len;
int timestamp;
int stream_id;
int i;
int flags;
loop:
/* 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))
return 0; /* EOF */
stream_skip(demuxer->stream, 2); /* version */
len = stream_read_word(demuxer->stream);
if (len == -256) /* EOF */
return 0;
if (len < 12)
{
printf("bad packet len (%d)\n", len);
stream_skip(demuxer->stream, len);
goto loop;
}
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);
/* flags: */
/* 0x1 - reliable */
/* 0x2 - keyframe */
// printf("packet#%d: pos: %d, len: %d, stream_id: %d, timestamp: %d, flags: %x\n",
// priv->current_packet, stream_tell(demuxer->stream)-12, len, stream_id, timestamp, flags);
priv->current_packet++;
len -= 12;
/* check if stream_id is audio stream */
for (i = 0; i < priv->last_a_stream; i++)
{
if (priv->a_streams[i] == stream_id)
{
// printf("packet is audio (id: %d)\n", stream_id);
ds = demuxer->audio; /* FIXME */
sh_audio = ds->sh;
priv->current_apacket++;
break;
}
}
/* check if stream_id is video stream */
for (i = 0; i < priv->last_v_stream; i++)
{
if (priv->v_streams[i] == stream_id)
{
// printf("packet is video (id: %d)\n", stream_id);
ds = demuxer->video; /* FIXME */
priv->current_vpacket++;
break;
}
}
/* id not found */
if (ds == NULL)
{
printf("unknown stream id (%d)\n", stream_id);
stream_skip(demuxer->stream, len);
goto loop;
}
demuxer->filepos = stream_tell(demuxer->stream);
#if 0
ds_read_packet(ds, demuxer->stream, len, timestamp/90000.0f,
demuxer->filepos, (flags & 0x2) ? 0x10 : 0);
#else
{
demux_packet_t *dp = new_demux_packet(len);
stream_read(demuxer->stream, dp->buffer, len);
/* if DNET, swap bytes! */
if (sh_audio != NULL)
if (sh_audio->format == 0x2000)
{
char *ptr = dp->buffer;
for (i = 0; i < len; i += 2)
{
const char tmp = ptr[0];
ptr[0] = ptr[1];
ptr[1] = tmp;
ptr += 2;
}
}
dp->pts = timestamp/90000.0f;
dp->pos = demuxer->filepos;
dp->flags = (flags & 0x2) ? 0x10 : 0;
ds_add_packet(ds, dp);
}
#endif
return 1;
}
void demux_open_real(demuxer_t* demuxer)
{
real_priv_t* priv = demuxer->priv;
int num_of_headers;
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);
printf("File version: %d\n", i);
num_of_headers = stream_read_dword(demuxer->stream);
// stream_skip(demuxer->stream, 4); /* number of headers */
priv->current_vid = priv->current_aid = -1;
/* 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 */
if (chunk_size < 10)
goto fail;
printf("Chunk: %.4s (%x) (size: 0x%x, offset: 0x%x)\n",
(char *)&chunk_id, chunk_id, chunk_size, chunk_pos);
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);
printf("First index chunk offset: 0x%x\n", priv->index_chunk_offset);
priv->data_chunk_offset = stream_read_dword(demuxer->stream)+10;
printf("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)
{
printf("Flags (%x): ", flags);
if (flags & 0x1)
printf("[save allowed] ");
if (flags & 0x2)
printf("[perfect play (more buffers)] ");
if (flags & 0x4)
printf("[live broadcast] ");
printf("\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);
printf("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);
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 version;
printf("Found audio stream!\n");
version = stream_read_word(demuxer->stream);
printf("version: %d\n", version);
// stream_skip(demuxer->stream, 2); /* version (4 or 5) */
stream_skip(demuxer->stream, 2);
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 */
stream_skip(demuxer->stream, 2); /* add codec info */
stream_skip(demuxer->stream, 4); /* coded frame size */
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 2); /* 1 */
// stream_skip(demuxer->stream, 2); /* coded frame size */
frame_size = stream_read_word(demuxer->stream);
printf("frame_size: %d\n", frame_size);
stream_skip(demuxer->stream, 4);
if (version == 5)
stream_skip(demuxer->stream, 6);
sh->samplerate = stream_read_word(demuxer->stream);
stream_skip(demuxer->stream, 4);
sh->channels = stream_read_word(demuxer->stream);
printf("samplerate: %d, channels: %d\n",
sh->samplerate, sh->channels);
if (version == 5)
{
stream_skip(demuxer->stream, 4);
stream_read(demuxer->stream, buf, 4);
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 = 16;
sh->wf->nSamplesPerSec = sh->samplerate;
sh->wf->nAvgBytesPerSec = bitrate;
sh->wf->nBlockAlign = frame_size;
sh->wf->cbSize = 0;
tmp = 1; /* supported audio codec */
switch (MKTAG(buf[0], buf[1], buf[2], buf[3]))
{
case MKTAG('d', 'n', 'e', 't'):
printf("Audio: DNET -> AC3\n");
sh->format = 0x2000;
break;
case MKTAG('s', 'i', 'p', 'r'):
printf("Audio: SiproLab's ACELP.net\n");
sh->format = 0x130;
/* for buggy directshow loader */
sh->wf = realloc(sh->wf, 18+4);
sh->wf->wBitsPerSample = 0;
sh->wf->nAvgBytesPerSec = 1055;
sh->wf->nBlockAlign = 19;
// sh->wf->nBlockAlign = frame_size / 288;
sh->wf->cbSize = 4;
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;
case MKTAG('c', 'o', 'o', 'k'):
printf("Audio: Real's GeneralCooker (?) (RealAudio G2?) (unsupported)\n");
tmp = 0;
break;
case MKTAG('a', 't', 'r', 'c'):
printf("Audio: Sony ATRAC3 (RealAudio 8) (unsupported)\n");
sh->format = 0x270;
sh->wf->nAvgBytesPerSec = 16537; // 8268
sh->wf->nBlockAlign = 384; // 192
sh->wf->wBitsPerSample = 0; /* from AVI created by VirtualDub */
/* 14 bytes extra header needed ! */
sh->wf->cbSize = 14;
sh->wf = realloc(sh->wf, 18+sh->wf->cbSize);
break;
default:
printf("Audio: Unknown (%s)\n", buf);
tmp = 0;
sh->format = MKTAG(buf[0], buf[1], buf[2], buf[3]);
}
sh->wf->wFormatTag = sh->format;
print_wave_header(sh->wf);
if (tmp)
{
/* insert as stream */
demuxer->audio->sh = sh;
sh->ds = demuxer->audio;
demuxer->audio->id = stream_id;
if (priv->last_a_stream+1 < MAX_STREAMS)
{
priv->a_streams[priv->last_a_stream] = stream_id;
priv->last_a_stream++;
}
priv->current_aid = stream_id;
}
else
free(sh->wf);
// break;
}
else
// case MKTAG('V', 'I', 'D', 'O'):
{
/* video header */
sh_video_t *sh = new_sh_video(demuxer, stream_id);
tmp = stream_read_dword_le(demuxer->stream);
printf("video: %.4s (%x)\n", (char *)&tmp, tmp);
if (tmp != MKTAG('V', 'I', 'D', 'O'))
{
mp_msg(MSGT_DEMUX, MSGL_ERR, "Not audio/video stream or unsupported!\n");
goto skip_this_chunk;
}
sh->format = stream_read_dword_le(demuxer->stream); /* fourcc */
printf("video fourcc: %.4s (%x)\n", (char *)&sh->format, sh->format);
/* emulate BITMAPINFOHEADER */
sh->bih = malloc(sizeof(BITMAPINFOHEADER));
memset(sh->bih, 0, sizeof(BITMAPINFOHEADER));
sh->bih->biSize = 40;
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;
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 2);
stream_skip(demuxer->stream, 4);
stream_skip(demuxer->stream, 2);
/* h263 hack */
tmp = stream_read_dword(demuxer->stream);
printf("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:
/* codec id: rv20 */
break;
default:
/* codec id: none */
printf("unknown id: %x\n", tmp);
}
/* insert as stream */
demuxer->video->sh = sh;
sh->ds = demuxer->video;
demuxer->video->id = stream_id;
if (priv->last_v_stream+1 < MAX_STREAMS)
{
priv->v_streams[priv->last_v_stream] = stream_id;
priv->last_v_stream++;
}
priv->current_vid = stream_id;
}
// break;
// default:
skip_this_chunk:
/* skip codec info */
tmp = stream_tell(demuxer->stream) - codec_pos;
stream_skip(demuxer->stream, codec_data_size - tmp);
break;
// }
}
case MKTAG('D', 'A', 'T', 'A'):
goto header_end;
case MKTAG('I', 'N', 'D', 'X'):
default:
printf("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 */
printf("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) || (index_mode == 2)))
parse_index_chunk(demuxer);
fail:
return;
}
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 video_chunk_pos = d_video->pos;
int vid = priv->current_vid, aid = priv->current_aid;
int next_offset;
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);
stream_seek(demuxer->stream, next_offset);
}
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