compression.h

/*****************************************************************
 * gavl - a general purpose audio/video processing library
 *
 * Copyright (c) 2001 - 2011 Members of the Gmerlin project
 * gmerlin-general@lists.sourceforge.net
 * http://gmerlin.sourceforge.net
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * *****************************************************************/

#ifndef GAVL_COMPRESSION_H_INCLUDED
#define GAVL_COMPRESSION_H_INCLUDED

#include <gavl/gavldefs.h>

#ifdef __cplusplus
extern "C" {
#endif

#define GAVL_COMPRESSION_HAS_P_FRAMES (1<<0) //!< Not all frames are keyframes
#define GAVL_COMPRESSION_HAS_B_FRAMES (1<<1) //!< Frames don't appear in presentation order 
#define GAVL_COMPRESSION_HAS_FIELD_PICTURES (1<<2) //!< Packets can consist of 2 consecutive fields
#define GAVL_COMPRESSION_SBR                (1<<3) //!< Samplerate got doubled by decoder, format and sample counts are for the upsampled rate

typedef enum
  {
    GAVL_CODEC_ID_NONE  = 0, 
    /* Audio */
    GAVL_CODEC_ID_ALAW  = 1, 
    GAVL_CODEC_ID_ULAW,      
    GAVL_CODEC_ID_MP2,       
    GAVL_CODEC_ID_MP3,       
    GAVL_CODEC_ID_AC3,       
    GAVL_CODEC_ID_AAC,       
    GAVL_CODEC_ID_VORBIS,    
    GAVL_CODEC_ID_FLAC,      
    
    /* Video */
    GAVL_CODEC_ID_JPEG = 0x10000, 
    GAVL_CODEC_ID_PNG,            
    GAVL_CODEC_ID_TIFF,           
    GAVL_CODEC_ID_TGA,            
    GAVL_CODEC_ID_MPEG1,          
    GAVL_CODEC_ID_MPEG2,          
    GAVL_CODEC_ID_MPEG4_ASP,      
    GAVL_CODEC_ID_H264,           
    GAVL_CODEC_ID_THEORA,         
    GAVL_CODEC_ID_DIRAC,          
    GAVL_CODEC_ID_DV,             
  } gavl_codec_id_t;

typedef struct
  {
  int flags; 
  gavl_codec_id_t id; 
  
  uint8_t * global_header; 
  int global_header_len;   
  
  int bitrate;             
  int palette_size;        
  } gavl_compression_info_t;

GAVL_PUBLIC
void gavl_compression_info_free(gavl_compression_info_t* info);

GAVL_PUBLIC
void gavl_compression_info_dump(const gavl_compression_info_t * info);

GAVL_PUBLIC
void gavl_compression_info_copy(gavl_compression_info_t * dst,
                                const gavl_compression_info_t * src);

  
GAVL_PUBLIC
const char * gavl_compression_get_extension(gavl_codec_id_t id, int * separate);

GAVL_PUBLIC
int gavl_compression_need_pixelformat(gavl_codec_id_t id);

GAVL_PUBLIC
int gavl_compression_constant_frame_samples(gavl_codec_id_t id);

  
  
#define GAVL_PACKET_TYPE_I 'I'      //!< Packet is an I-frame
#define GAVL_PACKET_TYPE_P 'P'      //!< Packet is a P-frame
#define GAVL_PACKET_TYPE_B 'B'      //!< Packet is a B-frame
#define GAVL_PACKET_TYPE_MASK 0xff  //!< Mask for frame type

#define GAVL_PACKET_KEYFRAME (1<<8) //!< Packet is a keyframe
#define GAVL_PACKET_LAST     (1<<9) //!< Packet is the last in the stream (only Xiph codecs need this flag)

typedef struct
  {
  uint8_t * data; 
  int data_len;   
  int data_alloc; 

  int flags;      

  int64_t pts;      
  int64_t duration; 

  int field2_offset; 
  int header_size;   
  int sequence_end_pos;    

  } gavl_packet_t;

GAVL_PUBLIC
void gavl_packet_alloc(gavl_packet_t * p, int len);

GAVL_PUBLIC
void gavl_packet_free(gavl_packet_t * p);

GAVL_PUBLIC
void gavl_packet_dump(const gavl_packet_t * p);

#ifdef __cplusplus
}
#endif
 

#endif // GAVL_COMPRESSION_H_INCLUDED