path: root/libmpdemux/demux_ogg.c

#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <math.h>
#include <inttypes.h>

#include "mp_msg.h"
#include "help_mp.h"
#include "stream/stream.h"
#include "demuxer.h"
#include "stheader.h"
#include "libavutil/intreadwrite.h"

#define FOURCC_VORBIS mmioFOURCC('v', 'r', 'b', 's')
#define FOURCC_SPEEX  mmioFOURCC('s', 'p', 'x', ' ')
#define FOURCC_THEORA mmioFOURCC('t', 'h', 'e', 'o')

#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>
extern int _ilog (unsigned int); /* defined in many places in theora/lib/ */
#endif

#define BLOCK_SIZE 4096

/* 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 __attribute__((__packed__)) 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;

	ogg_int16_t padding;

	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 speex;
  int theora;
  int flac;
  int text;
  int id;

  vorbis_info      vi;
  int vi_inited;

  void *ogg_d;
} 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;

  /* Used for subtitle switching. */
  int n_text;
  int *text_ids;
  char **text_langs;
} 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 char *dvdsub_lang, *audio_lang;
extern int dvdsub_id;

//-------- 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;
//FILE* subout;

void demux_ogg_add_sub (ogg_stream_t* os,ogg_packet* pack) {
  int lcv;
  char *packet = pack->packet;

  if (pack->bytes < 4)
    return;
  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]);

  if (((unsigned char)packet[0]) == 0x88) { // some subtitle text
    // Find data start
    double endpts = MP_NOPTS_VALUE;
    int32_t duration = 0;
    int16_t hdrlen = (*packet & PACKET_LEN_BITS01)>>6, i;
    hdrlen |= (*packet & PACKET_LEN_BITS2) <<1;
    lcv = 1 + hdrlen;
    if (pack->bytes < lcv)
      return;
    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;
      endpts = 1.0 + pts + (float)duration/1000.0;
    }
    sub_clear_text(&ogg_sub, MP_NOPTS_VALUE);
    sub_add_text(&ogg_sub, &packet[lcv], pack->bytes - lcv, endpts);
  }

  mp_msg(MSGT_DEMUX,MSGL_DBG2,"Ogg sub lines: %d  first: '%s'\n",
      ogg_sub.lines, ogg_sub.text[0]);
#ifdef USE_ICONV
  subcp_recode(&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