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mpv/libmpdemux/demux_ogg.c

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#include "config.h"
#ifdef HAVE_OGGVORBIS
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <math.h>
#include "../mp_msg.h"
#include "../help_mp.h"
#include "stream.h"
#include "demuxer.h"
#include "stheader.h"
#ifdef TREMOR
#include <tremor/ogg.h>
#include <tremor/ivorbiscodec.h>
#else
#include <ogg/ogg.h>
#include <vorbis/codec.h>
#endif
#ifdef HAVE_OGGTHEORA
#include <theora/theora.h>
#endif
#define BLOCK_SIZE 4096
/// Vorbis decoder context : we need the vorbis_info for vorbis timestamping
/// Shall we put this struct def in a common header ?
typedef struct ov_struct_st {
vorbis_info vi; /* struct that stores all the static vorbis bitstream
settings */
vorbis_comment vc; /* struct that stores all the bitstream user comments */
vorbis_dsp_state vd; /* central working state for the packet->PCM decoder */
vorbis_block vb; /* local working space for packet->PCM decode */
float rg_scale; /* replaygain scale */
#ifdef TREMOR
int rg_scale_int;
#endif
} ov_struct_t;
/* Theora decoder context : we won't be able to interpret granule positions
* without using theora_granule_time with the theora_state of the stream.
* This is duplicated in `vd_theora.c'; put this in a common header?
*/
#ifdef HAVE_OGGTHEORA
typedef struct theora_struct_st {
theora_state st;
theora_comment cc;
theora_info inf;
} theora_struct_t;
#endif
//// OggDS headers
// Header for the new header format
typedef struct stream_header_video
{
ogg_int32_t width;
ogg_int32_t height;
} stream_header_video;
typedef struct stream_header_audio
{
ogg_int16_t channels;
ogg_int16_t blockalign;
ogg_int32_t avgbytespersec;
} stream_header_audio;
typedef struct stream_header
{
char streamtype[8];
char subtype[4];
ogg_int32_t size; // size of the structure
ogg_int64_t time_unit; // in reference time
ogg_int64_t samples_per_unit;
ogg_int32_t default_len; // in media time
ogg_int32_t buffersize;
ogg_int16_t bits_per_sample;
union
{
// Video specific
stream_header_video video;
// Audio specific
stream_header_audio audio;
} sh;
} stream_header;
/// Our private datas
typedef struct ogg_syncpoint {
int64_t granulepos;
off_t page_pos;
} ogg_syncpoint_t;
/// A logical stream
typedef struct ogg_stream {
/// Timestamping stuff
float samplerate; /// granulpos 2 time
int64_t lastpos;
int32_t lastsize;
// Logical stream state
ogg_stream_state stream;
int hdr_packets;
int vorbis;
int theora;
int flac;
int text;
} ogg_stream_t;
typedef struct ogg_demuxer {
/// Physical stream state
ogg_sync_state sync;
/// Current page
ogg_page page;
/// Logical streams
ogg_stream_t *subs;
int num_sub;
ogg_syncpoint_t* syncpoints;
int num_syncpoint;
off_t pos, last_size;
int64_t final_granulepos;
} ogg_demuxer_t;
#define NUM_VORBIS_HDR_PACKETS 3
/// Some defines from OggDS
#define PACKET_TYPE_HEADER 0x01
#define PACKET_TYPE_BITS 0x07
#define PACKET_LEN_BITS01 0xc0
#define PACKET_LEN_BITS2 0x02
#define PACKET_IS_SYNCPOINT 0x08
extern int index_mode;
extern char *dvdsub_lang, *audio_lang;
//-------- subtitle support - should be moved to decoder layer, and queue
// - subtitles up in demuxer buffer...
#include "../subreader.h"
#include "../libvo/sub.h"
#define OGG_SUB_MAX_LINE 128
static subtitle ogg_sub;
extern subtitle* vo_sub;
static float clear_sub;
//FILE* subout;
static
uint16_t get_uint16 (const void *buf)
{
uint16_t ret;
unsigned char *tmp;
tmp = (unsigned char *) buf;
ret = tmp[1] & 0xff;
ret = (ret << 8) + (tmp[0] & 0xff);
return (ret);
}
static
uint32_t get_uint32 (const void *buf)
{
uint32_t ret;
unsigned char *tmp;
tmp = (unsigned char *) buf;
ret = tmp[3] & 0xff;
ret = (ret << 8) + (tmp[2] & 0xff);
ret = (ret << 8) + (tmp[1] & 0xff);
ret = (ret << 8) + (tmp[0] & 0xff);
return (ret);
}
static
uint64_t get_uint64 (const void *buf)
{
uint64_t ret;
unsigned char *tmp;
tmp = (unsigned char *) buf;
ret = tmp[7] & 0xff;
ret = (ret << 8) + (tmp[6] & 0xff);
ret = (ret << 8) + (tmp[5] & 0xff);
ret = (ret << 8) + (tmp[4] & 0xff);
ret = (ret << 8) + (tmp[3] & 0xff);
ret = (ret << 8) + (tmp[2] & 0xff);
ret = (ret << 8) + (tmp[1] & 0xff);
ret = (ret << 8) + (tmp[0] & 0xff);
return (ret);
}
void demux_ogg_init_sub () {
int lcv;
if(!ogg_sub.text[0]) // not yet allocated
for (lcv = 0; lcv < SUB_MAX_TEXT; lcv++) {
ogg_sub.text[lcv] = (char*)malloc(OGG_SUB_MAX_LINE);
}
}
void demux_ogg_add_sub (ogg_stream_t* os,ogg_packet* pack) {
int lcv;
int line_pos = 0;
int ignoring = 0;
char *packet = pack->packet;
mp_msg(MSGT_DEMUX,MSGL_DBG2,"\ndemux_ogg_add_sub %02X %02X %02X '%s'\n",
(unsigned char)packet[0],
(unsigned char)packet[1],
(unsigned char)packet[2],
&packet[3]);
ogg_sub.lines = 0;
if (((unsigned char)packet[0]) == 0x88) { // some subtitle text
// Find data start
int32_t duration = 0;
int16_t hdrlen = (*packet & PACKET_LEN_BITS01)>>6, i;
hdrlen |= (*packet & PACKET_LEN_BITS2) <<1;
lcv = 1 + hdrlen;
for (i = hdrlen; i > 0; i--) {
duration <<= 8;
duration |= (unsigned char)packet[i];
}
if ((hdrlen > 0) && (duration > 0)) {
float pts;
if(pack->granulepos == -1)
pack->granulepos = os->lastpos + os->lastsize;
pts = (float)pack->granulepos/(float)os->samplerate;
clear_sub = 1.0 + pts + (float)duration/1000.0;
}
while (1) {
int c = packet[lcv++];
if(c=='\n' || c==0 || line_pos >= OGG_SUB_MAX_LINE-1){
ogg_sub.text[ogg_sub.lines][line_pos] = 0; // close sub
if(line_pos) ogg_sub.lines++;
if(!c || ogg_sub.lines>=SUB_MAX_TEXT) break; // EOL or TooMany
line_pos = 0;
}
switch (c) {
case '\r':
case '\n': // just ignore linefeeds for now
// their placement seems rather haphazard
break;
case '<': // some html markup, ignore for now
ignoring = 1;
break;
case '>':
ignoring = 0;
break;
default:
if(!ignoring)
ogg_sub.text[ogg_sub.lines][line_pos++] = c;
break;
}
}
}
mp_msg(MSGT_DEMUX,MSGL_DBG2,"Ogg sub lines: %d first: '%s'\n",
ogg_sub.lines, ogg_sub.text[0]);
#ifdef USE_ICONV
subcp_recode1(&ogg_sub);
#endif
vo_sub = &ogg_sub;
vo_osd_changed(OSDTYPE_SUBTITLE);
}
// get the logical stream of the current page
// fill os if non NULL and return the stream id
static int demux_ogg_get_page_stream(ogg_demuxer_t* ogg_d,ogg_stream_state** os) {
int id,s_no;
ogg_page* page = &ogg_d->page;
s_no = ogg_page_serialno(page);
for(id= 0; id < ogg_d->num_sub ; id++) {
if(s_no == ogg_d->subs[id].stream.serialno)
break;
}
if(id == ogg_d->num_sub) {
// If we have only one vorbis stream allow the stream id to change
// it's normal on radio stream (each song have an different id).
// But we (or the codec?) should check that the samplerate, etc
// doesn't change (for radio stream it's ok)
if(ogg_d->num_sub == 1 && ogg_d->subs[0].vorbis) {
ogg_stream_reset(&ogg_d->subs[0].stream);
ogg_stream_init(&ogg_d->subs[0].stream,s_no);
id = 0;
} else
return -1;
}
if(os)
*os = &ogg_d->subs[id].stream;
return id;
}
static unsigned char* demux_ogg_read_packet(ogg_stream_t* os,ogg_packet* pack,void *context,float* pts,int* flags) {
unsigned char* data;
*pts = 0;
*flags = 0;
if(os->vorbis) {
data = pack->packet;
if(*pack->packet & PACKET_TYPE_HEADER)
os->hdr_packets++;
else if (context )
{
vorbis_info *vi = &((ov_struct_t*)context)->vi;
// When we dump the audio, there is no vi, but we don't care of timestamp in this case
int32_t blocksize = vorbis_packet_blocksize(vi,pack) / vi->channels;
// Calculate the timestamp if the packet don't have any
if(pack->granulepos == -1) {
pack->granulepos = os->lastpos;
if(os->lastsize > 0)
pack->granulepos += os->lastsize;
}
*pts = pack->granulepos / (float)vi->rate;
os->lastsize = blocksize;
os->lastpos = pack->granulepos;
}
# ifdef HAVE_OGGTHEORA
} else if (os->theora) {
/* we pass complete packets to theora, mustn't strip the header! */
data = pack->packet;
os->lastsize = 1;
/* header packets beginn on 1-bit: thus check (*data&0x80). We don't
have theora_state st, until all header packets were passed to the
decoder. */
if (context != NULL && !(*data&0x80))
{
theora_info *thi = ((theora_struct_t*)context)->st.i;
int keyframe_granule_shift=_ilog(thi->keyframe_frequency_force-1);
int64_t iframemask = (1 << keyframe_granule_shift) - 1;
if (pack->granulepos >= 0)
{
os->lastpos = pack->granulepos >> keyframe_granule_shift;
os->lastpos += pack->granulepos & iframemask;
*flags = ((pack->granulepos & iframemask) == 0);
}
else
{
os->lastpos++;
}
pack->granulepos = os->lastpos;
*pts = (double)os->lastpos / (double)os->samplerate;
}
#endif /* HAVE_OGGTHEORA */
# ifdef HAVE_FLAC
} else if (os->flac) {
/* we pass complete packets to flac, mustn't strip the header! */
data = pack->packet;
#endif /* HAVE_FLAC */
} else {
if(*pack->packet & PACKET_TYPE_HEADER)
os->hdr_packets++;
else {
// Find data start
int16_t hdrlen = (*pack->packet & PACKET_LEN_BITS01)>>6;
hdrlen |= (*pack->packet & PACKET_LEN_BITS2) <<1;
data = pack->packet + 1 + hdrlen;
// Calculate the timestamp
if(pack->granulepos == -1)
pack->granulepos = os->lastpos + (os->lastsize ? os->lastsize : 1);
// If we alredy have a timestamp it can be a syncpoint
if(*pack->packet & PACKET_IS_SYNCPOINT)
*flags = 1;
*pts = pack->granulepos/os->samplerate;
// Save the packet length and timestamp
os->lastsize = 0;
while(hdrlen) {
os->lastsize <<= 8;
os->lastsize |= pack->packet[hdrlen];
hdrlen--;
}
os->lastpos = pack->granulepos;
}
}
return data;
}
// check if clang has substring from comma separated langlist
static int demux_ogg_check_lang(char *clang, char *langlist)
{
char *c;
if (!langlist || !*langlist)
return 0;
while ((c = strchr(langlist, ',')))
{
if (!strncasecmp(clang, langlist, c - langlist))
return 1;
langlist = &c[1];
}
if (!strncasecmp(clang, langlist, strlen(langlist)))
return 1;
return 0;
}
/// Try to print out comments and also check for LANGUAGE= tag
static void demux_ogg_check_comments(demuxer_t *d, ogg_stream_t *os, int id, vorbis_comment *vc)
{
char *hdr, *val;
char **cmt = vc->user_comments;
while(*cmt)
{
hdr = NULL;
if (!strncasecmp(*cmt, "ENCODED_USING=", 14))
{
hdr = "Software";
val = *cmt + 14;
}
else if (!strncasecmp(*cmt, "LANGUAGE=", 9))
{
val = *cmt + 9;
// check for -slang if subs are uninitialized yet
if (os->text && d->sub->id == -1 && demux_ogg_check_lang(val, dvdsub_lang))
{
d->sub->id = id;
mp_msg(MSGT_DEMUX, MSGL_V, "Ogg demuxer: Displaying subtitle stream id %d which matched -slang %s\n", id, val);
}
else
hdr = "Language";
}
else if (!strncasecmp(*cmt, "ENCODER_URL=", 12))
{
hdr = "Encoder URL";
val = *cmt + 12;
}
else if (!strncasecmp(*cmt, "TITLE=", 6))
{
hdr = "Name";
val = *cmt + 6;
}
if (hdr)
mp_msg(MSGT_DEMUX, MSGL_V, " %s: %s\n", hdr, val);
cmt++;
}
}
/// Calculate the timestamp and add the packet to the demux stream
// return 1 if the packet was added, 0 otherwise
static int demux_ogg_add_packet(demux_stream_t* ds,ogg_stream_t* os,int id,ogg_packet* pack) {
demuxer_t* d = ds->demuxer;
demux_packet_t* dp;
unsigned char* data;
float pts = 0;
int flags = 0;
void *context = NULL;
// If packet is an comment header then we try to get comments at first
if (pack->bytes >= 7 && !memcmp(pack->packet, "\003vorbis", 7))
{
vorbis_info vi;
vorbis_comment vc;
vorbis_info_init(&vi);
vorbis_comment_init(&vc);
vi.rate = 1L; // it's checked by vorbis_synthesis_headerin()
if(vorbis_synthesis_headerin(&vi, &vc, pack) == 0) // if no errors
demux_ogg_check_comments(d, os, id, &vc);
vorbis_comment_clear(&vc);
vorbis_info_clear(&vi);
}
if (os->text) {
if (id == d->sub->id) // don't want to add subtitles to the demuxer for now
demux_ogg_add_sub(os,pack);
return 0;
}
// If packet is an header we jump it except for vorbis and theora
// (PACKET_TYPE_HEADER bit doesn't even exist for theora ?!)
// We jump nothing for FLAC. Ain't this great? Packet contents have to be
// handled differently for each and every stream type. The joy! The joy!
if(!os->flac && ((*pack->packet & PACKET_TYPE_HEADER) &&
(ds != d->audio || ( ((sh_audio_t*)ds->sh)->format != 0xFFFE || os->hdr_packets >= NUM_VORBIS_HDR_PACKETS ) ) &&
(ds != d->video || (((sh_video_t*)ds->sh)->format != 0xFFFC))))
return 0;
// For vorbis packet the packet is the data, for other codec we must jump
// the header
if(ds == d->audio && ((sh_audio_t*)ds->sh)->format == 0xFFFE)
context = ((sh_audio_t *)ds->sh)->context;
if (ds == d->video && ((sh_audio_t*)ds->sh)->format == 0xFFFC)
context = ((sh_video_t *)ds->sh)->context;
data = demux_ogg_read_packet(os,pack,context,&pts,&flags);
if(d->video->id < 0)
((sh_audio_t*)ds->sh)->delay = pts;
/// Clear subtitles if necessary (for broken files)
if ((clear_sub > 0) && (pts >= clear_sub)) {
ogg_sub.lines = 0;
vo_sub = &ogg_sub;
vo_osd_changed(OSDTYPE_SUBTITLE);
clear_sub = -1;
}
/// Send the packet
dp = new_demux_packet(pack->bytes-(data-pack->packet));
memcpy(dp->buffer,data,pack->bytes-(data-pack->packet));
dp->pts = pts;
dp->flags = flags;
ds_add_packet(ds,dp);
mp_msg(MSGT_DEMUX,MSGL_DBG2,"New dp: %p ds=%p pts=%5.3f len=%d flag=%d \n",
dp, ds, pts, dp->len, flags);
return 1;
}
/// if -forceidx build a table of all syncpoints to make seeking easier
/// otherwise try to get at least the final_granulepos
void demux_ogg_scan_stream(demuxer_t* demuxer) {
ogg_demuxer_t* ogg_d = demuxer->priv;
stream_t *s = demuxer->stream;
ogg_sync_state* sync = &ogg_d->sync;
ogg_page* page= &ogg_d->page;
ogg_stream_state* oss;
ogg_stream_t* os;
ogg_packet op;
int np,sid,p;
void *context = NULL;
off_t pos, last_pos;
pos = last_pos = demuxer->movi_start;
// Reset the stream
if(index_mode == 2) {
stream_seek(s,demuxer->movi_start);
} else {
//the 270000 are just a wild guess
stream_seek(s,max(ogg_d->pos,demuxer->movi_end-270000));
}
ogg_sync_reset(sync);
// Get the serial number of the stream we use
if(demuxer->video->id >= 0) {
sid = demuxer->video->id;
/* demux_ogg_read_packet needs decoder context for Theora streams */
if (((sh_video_t*)demuxer->video->sh)->format == 0xFFFC)
context = ((sh_video_t*)demuxer->video->sh)->context;
}
else {
sid = demuxer->audio->id;
/* demux_ogg_read_packet needs decoder context for Vorbis streams */
if(((sh_audio_t*)demuxer->audio->sh)->format == 0xFFFE)
context = ((sh_audio_t*)demuxer->audio->sh)->context;
}
os = &ogg_d->subs[sid];
oss = &os->stream;
while(1) {
np = ogg_sync_pageseek(sync,page);
if(np < 0) { // We had to skip some bytes
if(index_mode == 2) mp_msg(MSGT_DEMUX,MSGL_ERR,"Bad page sync while building syncpoints table (%d)\n",-np);
pos += -np;
continue;
}
if(np <= 0) { // We need more data
char* buf = ogg_sync_buffer(sync,BLOCK_SIZE);
int len = stream_read(s,buf,BLOCK_SIZE);
if(len == 0 && s->eof)
break;
ogg_sync_wrote(sync,len);
continue;
}
// The page is ready
//ogg_sync_pageout(sync,page);
if(ogg_page_serialno(page) != os->stream.serialno) { // It isn't a page from the stream we want
pos += np;
continue;
}
if(ogg_stream_pagein(oss,page) != 0) {
mp_msg(MSGT_DEMUX,MSGL_ERR,"Pagein error ????\n");
pos += np;
continue;
}
p = 0;
while(ogg_stream_packetout(oss,&op) == 1) {
float pts;
int flags;
demux_ogg_read_packet(os,&op,context,&pts,&flags);
if(op.granulepos >= 0) ogg_d->final_granulepos = op.granulepos;
if(index_mode == 2 && (flags || (os->vorbis && op.granulepos >= 0))) {
ogg_d->syncpoints = (ogg_syncpoint_t*)realloc(ogg_d->syncpoints,(ogg_d->num_syncpoint+1)*sizeof(ogg_syncpoint_t));
ogg_d->syncpoints[ogg_d->num_syncpoint].granulepos = op.granulepos;
ogg_d->syncpoints[ogg_d->num_syncpoint].page_pos = (ogg_page_continued(page) && p == 0) ? last_pos : pos;
ogg_d->num_syncpoint++;
}
p++;
}
if(p > 1 || (p == 1 && ! ogg_page_continued(page)))
last_pos = pos;
pos += np;
if(index_mode == 2) mp_msg(MSGT_DEMUX,MSGL_INFO,"Building syncpoint table %d%%\r",(int)(pos*100/s->end_pos));
}
if(index_mode == 2) mp_msg(MSGT_DEMUX,MSGL_INFO,"\n");
if(index_mode == 2) mp_msg(MSGT_DEMUX,MSGL_V,"Ogg syncpoints table builed: %d syncpoints\n",ogg_d->num_syncpoint);
mp_msg(MSGT_DEMUX,MSGL_V,"Ogg stream length (granulepos): %lld\n",ogg_d->final_granulepos);
stream_reset(s);
stream_seek(s,demuxer->movi_start);
ogg_sync_reset(sync);
for(np = 0 ; np < ogg_d->num_sub ; np++) {
ogg_stream_reset(&ogg_d->subs[np].stream);
ogg_d->subs[np].lastpos = ogg_d->subs[np].lastsize = ogg_d->subs[np].hdr_packets = 0;
}
// Get the first page
while(1) {
np = ogg_sync_pageout(sync,page);
if(np <= 0) { // We need more data
char* buf = ogg_sync_buffer(sync,BLOCK_SIZE);
int len = stream_read(s,buf,BLOCK_SIZE);
if(len == 0 && s->eof) {
mp_msg(MSGT_DEMUX,MSGL_ERR,"EOF while trying to get the first page !!!!\n");
break;
}
ogg_sync_wrote(sync,len);
continue;
}
demux_ogg_get_page_stream(ogg_d,&oss);
ogg_stream_pagein(oss,page);
break;
}
}
extern void print_wave_header(WAVEFORMATEX *h);
extern void print_video_header(BITMAPINFOHEADER *h);
/// Open an ogg physical stream
int demux_ogg_open(demuxer_t* demuxer) {
ogg_demuxer_t* ogg_d;
stream_t *s;
char* buf;
int np,s_no, n_audio = 0, n_video = 0, n_text = 0;
int audio_id = -1, video_id = -1, text_id = -1;
ogg_sync_state* sync;
ogg_page* page;
ogg_packet pack;
sh_audio_t* sh_a;
sh_video_t* sh_v;
#ifdef USE_ICONV
subcp_open_noenca();
#endif
clear_sub = -1;
s = demuxer->stream;
ogg_d = (ogg_demuxer_t*)calloc(1,sizeof(ogg_demuxer_t));
sync = &ogg_d->sync;
page = &ogg_d->page;
ogg_sync_init(sync);
while(1) {
/// Try to get a page
ogg_d->pos += ogg_d->last_size;
np = ogg_sync_pageseek(sync,page);
/// Error
if(np < 0) {
mp_msg(MSGT_DEMUX,MSGL_DBG2,"Ogg demuxer : Bad page sync\n");
free(ogg_d);
return 0;
}
/// Need some more data
if(np == 0) {
int len;
buf = ogg_sync_buffer(sync,BLOCK_SIZE);
len = stream_read(s,buf,BLOCK_SIZE);
if(len == 0 && s->eof) {
free(ogg_d);
return 0;
}
ogg_sync_wrote(sync,len);
continue;
}
ogg_d->last_size = np;
// We got one page now
if( ! ogg_page_bos(page) ) { // It's not a begining page
// Header parsing end here, we need to get the page otherwise it will be lost
int id = demux_ogg_get_page_stream(ogg_d,NULL);
if(id >= 0)
ogg_stream_pagein(&ogg_d->subs[id].stream,page);
else
mp_msg(MSGT_DEMUX,MSGL_ERR,"Ogg : Warning found none bos page from unknown stream %d\n",ogg_page_serialno(page));
break;
}
/// Init the data structure needed for a logical stream
ogg_d->subs = (ogg_stream_t*)realloc(ogg_d->subs,(ogg_d->num_sub+1)*sizeof(ogg_stream_t));
memset(&ogg_d->subs[ogg_d->num_sub],0,sizeof(ogg_stream_t));
/// Get the stream serial number
s_no = ogg_page_serialno(page);
ogg_stream_init(&ogg_d->subs[ogg_d->num_sub].stream,s_no);
mp_msg(MSGT_DEMUX,MSGL_DBG2,"Ogg : Found a stream with serial=%d\n",s_no);
// Take the first page
ogg_stream_pagein(&ogg_d->subs[ogg_d->num_sub].stream,page);
// Get first packet of the page
ogg_stream_packetout(&ogg_d->subs[ogg_d->num_sub].stream,&pack);
// Reset our vars
sh_a = NULL;
sh_v = NULL;
// Check for Vorbis
if(pack.bytes >= 7 && ! strncmp(&pack.packet[1],"vorbis", 6) ) {
sh_a = new_sh_audio(demuxer,ogg_d->num_sub);
sh_a->format = 0xFFFE;
ogg_d->subs[ogg_d->num_sub].vorbis = 1;
n_audio++;
mp_msg(MSGT_DEMUX,MSGL_V,"Ogg : stream %d is vorbis\n",ogg_d->num_sub);
// check for Theora
# ifdef HAVE_OGGTHEORA
} else if (pack.bytes >= 7 && !strncmp (&pack.packet[1], "theora", 6)) {
int errorCode = 0;
theora_info inf;
theora_comment cc;
theora_info_init (&inf);
theora_comment_init (&cc);
errorCode = theora_decode_header (&inf, &cc, &pack);
if (errorCode)
mp_msg(MSGT_DEMUX,MSGL_ERR,"Theora header parsing failed: %i \n",
errorCode);
else
{
sh_v = new_sh_video(demuxer,ogg_d->num_sub);
sh_v->context = NULL;
sh_v->bih = (BITMAPINFOHEADER*)calloc(1,sizeof(BITMAPINFOHEADER));
sh_v->bih->biSize=sizeof(BITMAPINFOHEADER);
sh_v->bih->biCompression= sh_v->format = 0xFFFC;
sh_v->fps = ((double)inf.fps_numerator)/
(double)inf.fps_denominator;
sh_v->frametime = ((double)inf.fps_denominator)/
(double)inf.fps_numerator;
sh_v->disp_w = sh_v->bih->biWidth = inf.width;
sh_v->disp_h = sh_v->bih->biHeight = inf.height;
sh_v->bih->biBitCount = 24;
sh_v->bih->biPlanes = 3;
sh_v->bih->biSizeImage = ((sh_v->bih->biBitCount/8) *
sh_v->bih->biWidth*sh_v->bih->biHeight);
ogg_d->subs[ogg_d->num_sub].samplerate = sh_v->fps;
ogg_d->subs[ogg_d->num_sub].theora = 1;
n_video++;
mp_msg(MSGT_DEMUX,MSGL_V,
"Ogg : stream %d is theora v%i.%i.%i %i:%i, %.3f FPS,"
" aspect %i:%i\n", ogg_d->num_sub,
(int)inf.version_major,
(int)inf.version_minor,
(int)inf.version_subminor,
inf.width, inf.height,
sh_v->fps,
inf.aspect_numerator, inf.aspect_denominator);
if(verbose>0) print_video_header(sh_v->bih);
}
# endif /* HAVE_OGGTHEORA */
# ifdef HAVE_FLAC
} else if (pack.bytes >= 4 && !strncmp (&pack.packet[0], "fLaC", 4)) {
sh_a = new_sh_audio(demuxer,ogg_d->num_sub);
sh_a->format = mmioFOURCC('f', 'L', 'a', 'C');
n_audio++;
ogg_d->subs[ogg_d->num_sub].flac = 1;
sh_a->wf = NULL;
mp_msg(MSGT_DEMUX,MSGL_V,"Ogg : stream %d is FLAC\n",ogg_d->num_sub);
# endif /* HAVE_FLAC */
/// Check for old header
} else if(pack.bytes >= 142 && ! strncmp(&pack.packet[1],"Direct Show Samples embedded in Ogg",35) ) {
// Old video header
if(get_uint32 (pack.packet+96) == 0x05589f80 && pack.bytes >= 184) {
sh_v = new_sh_video(demuxer,ogg_d->num_sub);
sh_v->bih = (BITMAPINFOHEADER*)calloc(1,sizeof(BITMAPINFOHEADER));
sh_v->bih->biSize=sizeof(BITMAPINFOHEADER);
sh_v->bih->biCompression=
sh_v->format = mmioFOURCC(pack.packet[68],pack.packet[69],
pack.packet[70],pack.packet[71]);
sh_v->frametime = get_uint64(pack.packet+164)*0.0000001;
sh_v->fps = 1/sh_v->frametime;
sh_v->disp_w = sh_v->bih->biWidth = get_uint32(pack.packet+176);
sh_v->disp_h = sh_v->bih->biHeight = get_uint32(pack.packet+180);
sh_v->bih->biBitCount = get_uint16(pack.packet+182);
if(!sh_v->bih->biBitCount) sh_v->bih->biBitCount=24; // hack, FIXME
sh_v->bih->biPlanes=1;
sh_v->bih->biSizeImage=(sh_v->bih->biBitCount>>3)*sh_v->bih->biWidth*sh_v->bih->biHeight;
ogg_d->subs[ogg_d->num_sub].samplerate = sh_v->fps;
n_video++;
mp_msg(MSGT_DEMUX,MSGL_V,"Ogg stream %d is video (old hdr)\n",ogg_d->num_sub);
if(verbose>0) print_video_header(sh_v->bih);
// Old audio header
} else if(get_uint32(pack.packet+96) == 0x05589F81) {
unsigned int extra_size;
sh_a = new_sh_audio(demuxer,ogg_d->num_sub);
extra_size = get_uint16(pack.packet+140);
sh_a->wf = (WAVEFORMATEX*)calloc(1,sizeof(WAVEFORMATEX)+extra_size);
sh_a->format = sh_a->wf->wFormatTag = get_uint16(pack.packet+124);
sh_a->channels = sh_a->wf->nChannels = get_uint16(pack.packet+126);
sh_a->samplerate = sh_a->wf->nSamplesPerSec = get_uint32(pack.packet+128);
sh_a->wf->nAvgBytesPerSec = get_uint32(pack.packet+132);
sh_a->wf->nBlockAlign = get_uint16(pack.packet+136);
sh_a->wf->wBitsPerSample = get_uint16(pack.packet+138);
sh_a->samplesize = (sh_a->wf->wBitsPerSample+7)/8;
sh_a->wf->cbSize = extra_size;
if(extra_size > 0)
memcpy(sh_a->wf+sizeof(WAVEFORMATEX),pack.packet+142,extra_size);
ogg_d->subs[ogg_d->num_sub].samplerate = sh_a->samplerate; // * sh_a->channels;
n_audio++;
mp_msg(MSGT_DEMUX,MSGL_V,"Ogg stream %d is audio (old hdr)\n",ogg_d->num_sub);
if(verbose>0) print_wave_header(sh_a->wf);
} else
mp_msg(MSGT_DEMUX,MSGL_WARN,"Ogg stream %d contains an old header but the header type is unknown\n",ogg_d->num_sub);
// Check new header
} else if ( (*pack.packet & PACKET_TYPE_BITS ) == PACKET_TYPE_HEADER &&
pack.bytes >= (int)sizeof(stream_header)+1) {
stream_header *st = (stream_header*)(pack.packet+1);
/// New video header
if(strncmp(st->streamtype,"video",5) == 0) {
sh_v = new_sh_video(demuxer,ogg_d->num_sub);
sh_v->bih = (BITMAPINFOHEADER*)calloc(1,sizeof(BITMAPINFOHEADER));
sh_v->bih->biSize=sizeof(BITMAPINFOHEADER);
sh_v->bih->biCompression=
sh_v->format = mmioFOURCC(st->subtype[0],st->subtype[1],
st->subtype[2],st->subtype[3]);
sh_v->frametime = get_uint64(&st->time_unit)*0.0000001;
sh_v->fps = 1.0/sh_v->frametime;
sh_v->bih->biBitCount = get_uint16(&st->bits_per_sample);
sh_v->disp_w = sh_v->bih->biWidth = get_uint32(&st->sh.video.width);
sh_v->disp_h = sh_v->bih->biHeight = get_uint32(&st->sh.video.height);
if(!sh_v->bih->biBitCount) sh_v->bih->biBitCount=24; // hack, FIXME
sh_v->bih->biPlanes=1;
sh_v->bih->biSizeImage=(sh_v->bih->biBitCount>>3)*sh_v->bih->biWidth*sh_v->bih->biHeight;
ogg_d->subs[ogg_d->num_sub].samplerate= sh_v->fps;
n_video++;
mp_msg(MSGT_DEMUX,MSGL_V,"Ogg stream %d is video (new hdr)\n",ogg_d->num_sub);
if(verbose>0) print_video_header(sh_v->bih);
/// New audio header
} else if(strncmp(st->streamtype,"audio",5) == 0) {
char buffer[5];
unsigned int extra_size = get_uint32 (&st->size) - sizeof(stream_header);
memcpy(buffer,st->subtype,4);
buffer[4] = '\0';
sh_a = new_sh_audio(demuxer,ogg_d->num_sub);
sh_a->wf = (WAVEFORMATEX*)calloc(1,sizeof(WAVEFORMATEX)+extra_size);
sh_a->format = sh_a->wf->wFormatTag = strtol(buffer, NULL, 16);
sh_a->channels = sh_a->wf->nChannels = get_uint16(&st->sh.audio.channels);
sh_a->samplerate = sh_a->wf->nSamplesPerSec = get_uint64(&st->samples_per_unit);
sh_a->wf->nAvgBytesPerSec = get_uint32(&st->sh.audio.avgbytespersec);
sh_a->wf->nBlockAlign = get_uint16(&st->sh.audio.blockalign);
sh_a->wf->wBitsPerSample = get_uint16(&st->bits_per_sample);
sh_a->samplesize = (sh_a->wf->wBitsPerSample+7)/8;
sh_a->wf->cbSize = extra_size;
if(extra_size)
memcpy(sh_a->wf+sizeof(WAVEFORMATEX),st+1,extra_size);
ogg_d->subs[ogg_d->num_sub].samplerate = sh_a->samplerate; // * sh_a->channels;
n_audio++;
mp_msg(MSGT_DEMUX,MSGL_V,"Ogg stream %d is audio (new hdr)\n",ogg_d->num_sub);
if(verbose>0) print_wave_header(sh_a->wf);
/// Check for text (subtitles) header
} else if (strncmp(st->streamtype, "text", 4) == 0) {
mp_msg(MSGT_DEMUX, MSGL_V, "Ogg stream %d is text\n", ogg_d->num_sub);
ogg_d->subs[ogg_d->num_sub].samplerate= get_uint64(&st->time_unit)/10;
ogg_d->subs[ogg_d->num_sub].text = 1;
if (demuxer->sub->id == n_text)
text_id = ogg_d->num_sub;
n_text++;
demux_ogg_init_sub();
//// Unknown header type
} else
mp_msg(MSGT_DEMUX,MSGL_ERR,"Ogg stream %d has a header marker but is of an unknown type\n",ogg_d->num_sub);
/// Unknown (invalid ?) header
} else
mp_msg(MSGT_DEMUX,MSGL_ERR,"Ogg stream %d is of an unknown type\n",ogg_d->num_sub);
if(sh_a || sh_v) {
demux_stream_t* ds = NULL;
if(sh_a) {
// If the audio stream is not defined we took the first one
if(demuxer->audio->id == -1) {
demuxer->audio->id = n_audio - 1;
// if(sh_a->wf) print_wave_header(sh_a->wf);
}
/// Is it the stream we want
if(demuxer->audio->id == (n_audio - 1)) {
demuxer->audio->sh = sh_a;
sh_a->ds = demuxer->audio;
ds = demuxer->audio;
audio_id = ogg_d->num_sub;
}
}
if(sh_v) {
/// Also for video
if(demuxer->video->id == -1) {
demuxer->video->id = n_video - 1;
// if(sh_v->bih) print_video_header(sh_v->bih);
}
if(demuxer->video->id == (n_video - 1)) {
demuxer->video->sh = sh_v;
sh_v->ds = demuxer->video;
ds = demuxer->video;
video_id = ogg_d->num_sub;
}
}
/// Add the header packets if the stream isn't seekable
if(ds && !s->end_pos) {
/// Finish the page, otherwise packets will be lost
do {
demux_ogg_add_packet(ds,&ogg_d->subs[ogg_d->num_sub],ogg_d->num_sub,&pack);
} while(ogg_stream_packetout(&ogg_d->subs[ogg_d->num_sub].stream,&pack) == 1);
}
}
ogg_d->num_sub++;
}
if(!n_video && !n_audio) {
free(ogg_d);
return 0;
}
/// Finish to setup the demuxer
demuxer->priv = ogg_d;
if(!n_video || (video_id < 0))
demuxer->video->id = -2;
else
demuxer->video->id = video_id;
if(!n_audio || (audio_id < 0))
demuxer->audio->id = -2;
else
demuxer->audio->id = audio_id;
/* Disable the subs only if there are no text streams at all.
Otherwise the stream to display might be chosen later when the comment
packet is encountered and the user used -slang instead of -sid. */
if(!n_text)
demuxer->sub->id = -2;
else if (text_id >= 0) {
demuxer->sub->id = text_id;
mp_msg(MSGT_DEMUX, MSGL_V, "Ogg demuxer: Displaying subtitle stream id %d\n", text_id);
}
ogg_d->final_granulepos=0;
if(!s->end_pos)
demuxer->seekable = 0;
else {
demuxer->movi_start = s->start_pos; // Needed for XCD (Ogg written in MODE2)
demuxer->movi_end = s->end_pos;
demuxer->seekable = 1;
demux_ogg_scan_stream(demuxer);
}
mp_msg(MSGT_DEMUX,MSGL_V,"Ogg demuxer : found %d audio stream%s, %d video stream%s and %d text stream%s\n",n_audio,n_audio>1?"s":"",n_video,n_video>1?"s":"",n_text,n_text>1?"s":"");
return 1;
}
int demux_ogg_fill_buffer(demuxer_t *d) {
ogg_demuxer_t* ogg_d;
stream_t *s;
demux_stream_t *ds;
ogg_sync_state* sync;
ogg_stream_state* os;
ogg_page* page;
ogg_packet pack;
int np = 0, id=0;
s = d->stream;
ogg_d = d->priv;
sync = &ogg_d->sync;
page = &ogg_d->page;
/// Find the stream we are working on
if ( (id = demux_ogg_get_page_stream(ogg_d,&os)) < 0) {
mp_msg(MSGT_DEMUX,MSGL_ERR,"Ogg demuxer : can't get current stream\n");
return 0;
}
while(1) {
np = 0;
ds = NULL;
/// Try to get some packet from the current page
while( (np = ogg_stream_packetout(os,&pack)) != 1) {
/// No packet we go the next page
if(np == 0) {
while(1) {
int pa,len;
char *buf;
ogg_d->pos += ogg_d->last_size;
/// Get the next page from the physical stream
while( (pa = ogg_sync_pageseek(sync,page)) <= 0) {
/// Error : we skip some bytes
if(pa < 0) {
mp_msg(MSGT_DEMUX,MSGL_WARN,"Ogg : Page out not synced, we skip some bytes\n");
ogg_d->pos -= pa;
continue;
}
/// We need more data
buf = ogg_sync_buffer(sync,BLOCK_SIZE);
len = stream_read(s,buf,BLOCK_SIZE);
if(len == 0 && s->eof) {
mp_msg(MSGT_DEMUX,MSGL_DBG2,"Ogg : Stream EOF !!!!\n");
return 0;
}
ogg_sync_wrote(sync,len);
} /// Page loop
ogg_d->last_size = pa;
/// Find the page's logical stream
if( (id = demux_ogg_get_page_stream(ogg_d,&os)) < 0) {
mp_msg(MSGT_DEMUX,MSGL_ERR,"Ogg demuxer error : we met an unknown stream\n");
return 0;
}
/// Take the page
if(ogg_stream_pagein(os,page) == 0)
break;
/// Page was invalid => retry
mp_msg(MSGT_DEMUX,MSGL_WARN,"Ogg demuxer : got invalid page !!!!!\n");
ogg_d->pos += ogg_d->last_size;
}
} else /// Packet was corrupted
mp_msg(MSGT_DEMUX,MSGL_WARN,"Ogg : bad packet in stream %d\n",id);
} /// Packet loop
/// Is the actual logical stream in use ?
if(id == d->audio->id)
ds = d->audio;
else if(id == d->video->id)
ds = d->video;
else if (ogg_d->subs[id].text)
ds = d->sub;
if(ds) {
if(!demux_ogg_add_packet(ds,&ogg_d->subs[id],id,&pack))
continue; /// Unuseful packet, get another
d->filepos = ogg_d->pos;
return 1;
}
} /// while(1)
}
/// For avi with Ogg audio stream we have to create an ogg demuxer for this
// stream, then we join the avi and ogg demuxer with a demuxers demuxer
demuxer_t* init_avi_with_ogg(demuxer_t* demuxer) {
demuxer_t *od;
ogg_demuxer_t *ogg_d;
stream_t* s;
uint32_t hdrsizes[3];
demux_packet_t *dp;
sh_audio_t *sh_audio = demuxer->audio->sh;
int np;
unsigned char *p = NULL,*buf;
int plen;
/// Check that the cbSize is enouth big for the following reads
if(sh_audio->wf->cbSize < 22+3*sizeof(uint32_t)) {
mp_msg(MSGT_DEMUX,MSGL_ERR,"AVI Ogg : Initial audio header is too small !!!!!\n");
goto fallback;
}
/// Get the size of the 3 header packet
memcpy(hdrsizes, ((unsigned char*)sh_audio->wf)+22+sizeof(WAVEFORMATEX), 3*sizeof(uint32_t));
// printf("\n!!!!!! hdr sizes: %d %d %d \n",hdrsizes[0],hdrsizes[1],hdrsizes[2]);
/// Check the size
if(sh_audio->wf->cbSize < 22+3*sizeof(uint32_t)+hdrsizes[0]+hdrsizes[1] + hdrsizes[2]) {
mp_msg(MSGT_DEMUX,MSGL_ERR,"AVI Ogg : Audio header is too small !!!!!\n");
goto fallback;
}
// Build the ogg demuxer private datas
ogg_d = (ogg_demuxer_t*)calloc(1,sizeof(ogg_demuxer_t));
ogg_d->num_sub = 1;
ogg_d->subs = (ogg_stream_t*)malloc(sizeof(ogg_stream_t));
ogg_d->subs[0].vorbis = 1;
// Init the ogg physical stream
ogg_sync_init(&ogg_d->sync);
// Get the first page of the stream : we assume there only 1 logical stream
while((np = ogg_sync_pageout(&ogg_d->sync,&ogg_d->page)) <= 0 ) {
if(np < 0) {
mp_msg(MSGT_DEMUX,MSGL_ERR,"AVI Ogg error : Can't init using first stream packets\n");
free(ogg_d);
goto fallback;
}
// Add some data
plen = ds_get_packet(demuxer->audio,&p);
buf = ogg_sync_buffer(&ogg_d->sync,plen);
memcpy(buf,p,plen);
ogg_sync_wrote(&ogg_d->sync,plen);
}
// Init the logical stream
mp_msg(MSGT_DEMUX,MSGL_DBG2,"AVI Ogg found page with serial %d\n",ogg_page_serialno(&ogg_d->page));
ogg_stream_init(&ogg_d->subs[0].stream,ogg_page_serialno(&ogg_d->page));
// Write the page
ogg_stream_pagein(&ogg_d->subs[0].stream,&ogg_d->page);
// Create the ds_stream and the ogg demuxer
s = new_ds_stream(demuxer->audio);
od = new_demuxer(s,DEMUXER_TYPE_OGG,0,-2,-2);
/// Add the header packets in the ogg demuxer audio stream
// Initial header
dp = new_demux_packet(hdrsizes[0]);
memcpy(dp->buffer,((unsigned char*)sh_audio->wf)+22+sizeof(WAVEFORMATEX)+3*sizeof(uint32_t),hdrsizes[0]);
ds_add_packet(od->audio,dp);
/// Comments
dp = new_demux_packet(hdrsizes[1]);
memcpy(dp->buffer,((unsigned char*)sh_audio->wf)+22+sizeof(WAVEFORMATEX)+3*sizeof(uint32_t)+hdrsizes[0],hdrsizes[1]);
ds_add_packet(od->audio,dp);
/// Code book
dp = new_demux_packet(hdrsizes[2]);
memcpy(dp->buffer,((unsigned char*)sh_audio->wf)+22+sizeof(WAVEFORMATEX)+3*sizeof(uint32_t)+hdrsizes[0]+hdrsizes[1],hdrsizes[2]);
ds_add_packet(od->audio,dp);
// Finish setting up the ogg demuxer
od->priv = ogg_d;
sh_audio = new_sh_audio(od,0);
od->audio->id = 0;
od->video->id = -2;
od->audio->sh = sh_audio;
sh_audio->ds = od->audio;
sh_audio->format = 0xFFFE;
/// Return the joined demuxers
return new_demuxers_demuxer(demuxer,od,demuxer);
fallback:
demuxer->audio->id = -2;
return demuxer;
}
extern void resync_audio_stream(sh_audio_t *sh_audio);
void demux_ogg_seek(demuxer_t *demuxer,float rel_seek_secs,int flags) {
ogg_demuxer_t* ogg_d = demuxer->priv;
ogg_sync_state* sync = &ogg_d->sync;
ogg_page* page= &ogg_d->page;
ogg_stream_state* oss;
ogg_stream_t* os;
demux_stream_t* ds;
sh_audio_t* sh_audio = demuxer->audio->sh;
ogg_packet op;
float rate;
int i,sp,first,precision=1,do_seek=1;
vorbis_info* vi = NULL;
int64_t gp = 0, old_gp;
void *context = NULL;
off_t pos, old_pos;
int np;
int is_gp_valid;
float pts;
int is_keyframe;
if(demuxer->video->id >= 0) {
ds = demuxer->video;
/* demux_ogg_read_packet needs decoder context for Theora streams */
if (((sh_video_t*)demuxer->video->sh)->format == 0xFFFC)
context = ((sh_video_t*)demuxer->video->sh)->context;
rate = ogg_d->subs[ds->id].samplerate;
} else {
ds = demuxer->audio;
/* demux_ogg_read_packet needs decoder context for Vorbis streams */
if(((sh_audio_t*)demuxer->audio->sh)->format == 0xFFFE)
context = ((sh_audio_t*)demuxer->audio->sh)->context;
vi = &((ov_struct_t*)((sh_audio_t*)ds->sh)->context)->vi;
rate = (float)vi->rate;
}
os = &ogg_d->subs[ds->id];
oss = &os->stream;
old_gp = os->lastpos;
old_pos = ogg_d->pos;
//calculate the granulepos to seek to
gp = flags & 1 ? 0 : os->lastpos;
if(flags & 2) {
if (ogg_d->final_granulepos > 0)
gp += ogg_d->final_granulepos * rel_seek_secs;
else
gp += rel_seek_secs * (demuxer->movi_end - demuxer->movi_start) * os->lastpos / ogg_d->pos;
} else
gp += rel_seek_secs * rate;
if (gp < 0) gp = 0;
//calculate the filepos to seek to
if(ogg_d->syncpoints) {
for(sp = 0; sp < ogg_d->num_syncpoint ; sp++) {
if(ogg_d->syncpoints[sp].granulepos >= gp) break;
}
if(sp >= ogg_d->num_syncpoint) return;
if (sp > 0 && ogg_d->syncpoints[sp].granulepos - gp > gp - ogg_d->syncpoints[sp-1].granulepos)
sp--;
if (ogg_d->syncpoints[sp].granulepos == os->lastpos) {
if (sp > 0 && gp < os->lastpos) sp--;
if (sp < ogg_d->num_syncpoint-1 && gp > os->lastpos) sp++;
}
pos = ogg_d->syncpoints[sp].page_pos;
precision = 0;
} else {
pos = flags & 1 ? 0 : ogg_d->pos;
if(flags & 2)
pos += (demuxer->movi_end - demuxer->movi_start) * rel_seek_secs;
else {
if (ogg_d->final_granulepos > 0) {
pos += rel_seek_secs * (demuxer->movi_end - demuxer->movi_start) / (ogg_d->final_granulepos / rate);
} else if (os->lastpos > 0) {
pos += rel_seek_secs * ogg_d->pos / (os->lastpos / rate);
}
}
if (pos < 0) pos = 0;
if (pos > (demuxer->movi_end - demuxer->movi_start)) return;
} // if(ogg_d->syncpoints)
while(1) {
if (do_seek) {
stream_seek(demuxer->stream,pos+demuxer->movi_start);
ogg_sync_reset(sync);
for(i = 0 ; i < ogg_d->num_sub ; i++) {
ogg_stream_reset(&ogg_d->subs[i].stream);
ogg_d->subs[i].lastpos = ogg_d->subs[i].lastsize = 0;
}
ogg_d->pos = pos;
ogg_d->last_size = 0;
/* we just guess that we reached correct granulepos, in case a
subsequent search occurs before we read a valid granulepos */
os->lastpos = gp;
first = !(ogg_d->syncpoints);
do_seek=0;
}
ogg_d->pos += ogg_d->last_size;
ogg_d->last_size = 0;
np = ogg_sync_pageseek(sync,page);
if(np < 0)
ogg_d->pos -= np;
if(np <= 0) { // We need more data
char* buf = ogg_sync_buffer(sync,BLOCK_SIZE);
int len = stream_read(demuxer->stream,buf,BLOCK_SIZE);
if(len == 0 && demuxer->stream->eof) {
mp_msg(MSGT_DEMUX,MSGL_ERR,"EOF while trying to seek !!!!\n");
break;
}
ogg_sync_wrote(sync,len);
continue;
}
ogg_d->last_size = np;
if(ogg_page_serialno(page) != oss->serialno)
continue;
if(ogg_stream_pagein(oss,page) != 0)
continue;
while(1) {
np = ogg_stream_packetout(oss,&op);
if(np < 0)
continue;
else if(np == 0)
break;
if (first) { /* Discard the first packet as it's probably broken,
and we don't have any other means to decide whether it is
complete or not. */
first = 0;
break;
}
is_gp_valid = (op.granulepos >= 0);
demux_ogg_read_packet(os,&op,context,&pts,&is_keyframe);
if (precision && is_gp_valid) {
precision--;
if (abs(gp - op.granulepos) > rate && (op.granulepos != old_gp)) {
//prepare another seek because we are off by more than 1s
pos += (gp - op.granulepos) * (pos - old_pos) / (op.granulepos - old_gp);
if (pos < 0) pos = 0;
if (pos < (demuxer->movi_end - demuxer->movi_start)) {
do_seek=1;
break;
}
}
}
if (is_gp_valid && (pos > 0) && (old_gp > gp)
&& (2 * (old_gp - op.granulepos) < old_gp - gp)) {
/* prepare another seek because looking for a syncpoint
destroyed the backward search */
pos = old_pos - 1.5 * (old_pos - pos);
if (pos < 0) pos = 0;
if (pos < (demuxer->movi_end - demuxer->movi_start)) {
do_seek=1;
break;
}
}
if(!precision && (is_keyframe || os->vorbis) ) {
ogg_sub.lines = 0;
vo_sub = &ogg_sub;
vo_osd_changed(OSDTYPE_SUBTITLE);
clear_sub = -1;
demux_ogg_add_packet(ds,os,ds->id,&op);
if(sh_audio)
resync_audio_stream(sh_audio);
return;
}
}
}
mp_msg(MSGT_DEMUX,MSGL_ERR,"Can't find the good packet :(\n");
}
void demux_close_ogg(demuxer_t* demuxer) {
ogg_demuxer_t* ogg_d = demuxer->priv;
if(!ogg_d)
return;
#ifdef USE_ICONV
subcp_close();
#endif
if(ogg_d->subs)
free(ogg_d->subs);
if(ogg_d->syncpoints)
free(ogg_d->syncpoints);
free(ogg_d);
}
int demux_ogg_control(demuxer_t *demuxer,int cmd, void *arg){
ogg_demuxer_t* ogg_d = demuxer->priv;
ogg_stream_t* os;
float rate;
if(demuxer->video->id >= 0) {
os = &ogg_d->subs[demuxer->video->id];
rate = os->samplerate;
} else {
os = &ogg_d->subs[demuxer->audio->id];
rate = (float)((ov_struct_t*)((sh_audio_t*)demuxer->audio->sh)->context)->vi.rate;
}
switch(cmd) {
case DEMUXER_CTRL_GET_TIME_LENGTH:
if (ogg_d->final_granulepos<=0) return DEMUXER_CTRL_DONTKNOW;
*((unsigned long *)arg)=ogg_d->final_granulepos / rate;
return DEMUXER_CTRL_GUESS;
case DEMUXER_CTRL_GET_PERCENT_POS:
if (ogg_d->final_granulepos<=0) return DEMUXER_CTRL_DONTKNOW;
*((int *)arg)=(int)( (os->lastpos*100) / ogg_d->final_granulepos);
return DEMUXER_CTRL_OK;
default:
return DEMUXER_CTRL_NOTIMPL;
}
}
#endif
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