libmp4.h

uclinux 下的vlc播放器源代码

#define MP4_TEXT_DISPLAY_FLAG_COLOR_HILITE       (1<<16)
#define MP4_TEXT_DISPLAY_FLAG_WRITE_VERTICALLY   (1<<17)

typedef struct
{
    uint32_t i_reserved1;
    uint16_t i_reserved2;

    uint16_t i_data_reference_index;

    uint32_t i_display_flags;   // TextDescription and Tx3gDescription

    int8_t i_justification_horizontal; // left(0), centered(1), right(-1)
    int8_t i_justification_vertical;   // top(0), centered(1), bottom(-1)

    uint16_t i_background_color[4];

    uint16_t i_text_box_top;
    uint16_t i_text_box_left;
    uint16_t i_text_box_bottom;
    uint16_t i_text_box_right;

    // TODO to complete
} MP4_Box_data_sample_text_t;

typedef struct MP4_Box_data_sample_hint_s
{
    uint8_t  i_reserved1[6];
    uint16_t i_data_reference_index;

    uint8_t *p_data;

} MP4_Box_data_sample_hint_t;

typedef struct MP4_Box_data_moviehintinformation_rtp_s
{
    uint32_t i_description_format;
    unsigned char *psz_text;

} MP4_Box_data_moviehintinformation_rtp_t;



typedef struct MP4_Box_data_stsd_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_entry_count;

    /* it contains SampleEntry handled as if it was Box */

} MP4_Box_data_stsd_t;


typedef struct MP4_Box_data_stsz_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_sample_size;
    uint32_t i_sample_count;

    uint32_t *i_entry_size; /* array , empty if i_sample_size != 0 */

} MP4_Box_data_stsz_t;

typedef struct MP4_Box_data_stz2_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_sample_size; /* 24 bits */
    uint8_t  i_field_size;
    uint32_t i_sample_count;

    uint32_t *i_entry_size; /* array: unsigned int(i_field_size) entry_size */

} MP4_Box_data_stz2_t;

typedef struct MP4_Box_data_stsc_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_entry_count;

    uint32_t *i_first_chunk; /* theses are arrays */
    uint32_t *i_samples_per_chunk;
    uint32_t *i_sample_description_index;

} MP4_Box_data_stsc_t;


typedef struct MP4_Box_data_co64_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_entry_count;

    uint64_t *i_chunk_offset;

} MP4_Box_data_co64_t;


typedef struct MP4_Box_data_stss_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_entry_count;

    uint32_t *i_sample_number;

} MP4_Box_data_stss_t;

typedef struct MP4_Box_data_stsh_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_entry_count;

    uint32_t *i_shadowed_sample_number;
    uint32_t *i_sync_sample_number;

} MP4_Box_data_stsh_t;

typedef struct MP4_Box_data_stdp_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint16_t *i_priority;

} MP4_Box_data_stdp_t;

typedef struct MP4_Box_data_padb_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_sample_count;

    uint16_t *i_reserved1;   /* 1bit  */
    uint16_t *i_pad2;        /* 3bits */
    uint16_t *i_reserved2;   /* 1bit  */
    uint16_t *i_pad1;        /* 3bits */


} MP4_Box_data_padb_t;


typedef struct MP4_Box_data_elst_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_entry_count;

    uint64_t *i_segment_duration;
    int64_t  *i_media_time;
    uint16_t *i_media_rate_integer;
    uint16_t *i_media_rate_fraction;


} MP4_Box_data_elst_t;

typedef struct MP4_Box_data_cprt_s
{
    uint8_t  i_version;
    uint32_t i_flags;
    /* 1 pad bit */
    unsigned char i_language[3];

    unsigned char *psz_notice;
} MP4_Box_data_cprt_t;


/* DecoderConfigDescriptor */
typedef struct MP4_descriptor_decoder_config_s
{
    uint8_t i_objectTypeIndication;
    uint8_t i_streamType;
    int     b_upStream;
    int     i_buffer_sizeDB;
    int     i_max_bitrate;
    int     i_avg_bitrate;

    int     i_decoder_specific_info_len;
    uint8_t *p_decoder_specific_info;
    /* some other stuff */

} MP4_descriptor_decoder_config_t;

typedef struct MP4_descriptor_SL_config_s
{

    int i_dummy; /* ANSI C forbids empty structures */

} MP4_descriptor_SL_config_t;


typedef struct MP4_descriptor_ES_s
{
    uint16_t i_ES_ID;
    int      b_stream_dependence;
    int      b_url;
    int      b_OCRstream;
    int      i_stream_priority;

    int      i_depend_on_ES_ID; /* if b_stream_dependence set */

    unsigned char *psz_URL;

    uint16_t i_OCR_ES_ID;       /* if b_OCRstream */
    MP4_descriptor_decoder_config_t *p_decConfigDescr;

    MP4_descriptor_SL_config_t *p_slConfigDescr;

    /* some other stuff ... */

} MP4_descriptor_ES_t;

/* ES descriptor */
typedef struct MP4_Box_data_esds_s
{
    uint8_t  i_version;
    uint32_t i_flags;

    MP4_descriptor_ES_t es_descriptor;

} MP4_Box_data_esds_t;


typedef struct MP4_Box_data_dcom_s
{
    uint32_t i_algorithm; /* fourcc */

} MP4_Box_data_dcom_t;

typedef struct MP4_Box_data_cmvd_s
{
    uint32_t i_uncompressed_size;
    uint32_t i_compressed_size;

    int     b_compressed; /* Set to 1 if compressed data, 0 if uncompressed */
    uint8_t *p_data;

} MP4_Box_data_cmvd_t;

typedef struct MP4_Box_data_cmov_s
{
    struct MP4_Box_s *p_moov; /* uncompressed moov */

} MP4_Box_data_cmov_t;

typedef struct
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_ref_type;
    char     *psz_ref;

} MP4_Box_data_rdrf_t;

typedef struct
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_rate;

} MP4_Box_data_rmdr_t;

typedef struct
{
    uint8_t  i_version;
    uint32_t i_flags;

    uint32_t i_gestaltType;
    uint32_t i_val1;
    uint32_t i_val2;
    uint16_t i_checkType;   /* 0: val1 is version min
                               1: gestalt value & val2 == val1 */

} MP4_Box_data_rmvc_t;

typedef struct
{
    uint8_t  i_version;
    uint32_t i_flags;


} MP4_Box_data_rmcd_t;

typedef struct
{
    uint32_t i_quality;

} MP4_Box_data_rmqu_t;

typedef struct
{
    char *psz_text;

} MP4_Box_data_0xa9xxx_t;

typedef struct
{
    uint8_t i_version;
    uint8_t i_profile;
    uint8_t i_profile_compatibility;
    uint8_t i_level;

    uint8_t i_reserved1;     /* 6 bits */
    uint8_t i_length_size;

    uint8_t i_reserved2;    /* 3 bits */
    uint8_t  i_sps;
    uint16_t *i_sps_length;
    uint8_t  **sps;

    uint8_t  i_pps;
    uint16_t *i_pps_length;
    uint8_t  **pps;

    /* XXX: Hack raw avcC atom payload */
    int     i_avcC;
    uint8_t *p_avcC;

} MP4_Box_data_avcC_t;

/*
typedef struct MP4_Box_data__s
{
    uint8_t  i_version;
    uint32_t i_flags;

} MP4_Box_data__t;

*/

typedef union MP4_Box_data_s
{
    MP4_Box_data_ftyp_t *p_ftyp;
    MP4_Box_data_mvhd_t *p_mvhd;
    MP4_Box_data_tkhd_t *p_tkhd;
    MP4_Box_data_mdhd_t *p_mdhd;
    MP4_Box_data_hdlr_t *p_hdlr;
    MP4_Box_data_vmhd_t *p_vmhd;
    MP4_Box_data_smhd_t *p_smhd;
    MP4_Box_data_hmhd_t *p_hmhd;
    MP4_Box_data_url_t  *p_url;
    MP4_Box_data_urn_t  *p_urn;
    MP4_Box_data_dref_t *p_dref;
    MP4_Box_data_stts_t *p_stts;
    MP4_Box_data_ctts_t *p_ctts;
    MP4_Box_data_stsd_t *p_stsd;
        MP4_Box_data_sample_vide_t *p_sample_vide;
        MP4_Box_data_sample_soun_t *p_sample_soun;
        MP4_Box_data_sample_text_t *p_sample_text;
        MP4_Box_data_sample_hint_t *p_sample_hint;

        MP4_Box_data_esds_t *p_esds;
        MP4_Box_data_avcC_t *p_avcC;

    MP4_Box_data_stsz_t *p_stsz;
    MP4_Box_data_stz2_t *p_stz2;
    MP4_Box_data_stsc_t *p_stsc;
    MP4_Box_data_co64_t *p_co64;
    MP4_Box_data_stss_t *p_stss;
    MP4_Box_data_stsh_t *p_stsh;
    MP4_Box_data_stdp_t *p_stdp;
    MP4_Box_data_padb_t *p_padb;
    MP4_Box_data_elst_t *p_elst;
    MP4_Box_data_cprt_t *p_cprt;

    MP4_Box_data_dcom_t *p_dcom;
    MP4_Box_data_cmvd_t *p_cmvd;
    MP4_Box_data_cmov_t *p_cmov;

    MP4_Box_data_moviehintinformation_rtp_t p_moviehintinformation_rtp;

    MP4_Box_data_rdrf_t *p_rdrf;
    MP4_Box_data_rmdr_t *p_rmdr;
    MP4_Box_data_rmqu_t *p_rmqu;
    MP4_Box_data_rmvc_t *p_rmvc;

    MP4_Box_data_0xa9xxx_t *p_0xa9xxx;

    void                *p_data; /* for unknow type */
} MP4_Box_data_t;



/* the most basic structure */
typedef struct MP4_Box_s
{
    off_t        i_pos;      /* absolute position */

    uint32_t     i_type;
    uint32_t     i_shortsize;

    UUID_t       i_uuid;  /* Set if i_type == "uuid" */

    uint64_t     i_size; /* always set so use it */

    MP4_Box_data_t   data;   /* union of pointers on extended data depending
                                on i_type (or i_usertype) */

    struct MP4_Box_s *p_father; /* pointer on the father Box */

    struct MP4_Box_s *p_first;  /* pointer on the first child Box */
    struct MP4_Box_s *p_last;

    struct MP4_Box_s *p_next;   /* pointer on the next boxes at the same level */

} MP4_Box_t;



/*****************************************************************************
 * MP4_BoxGetRoot : Parse the entire file, and create all boxes in memory
 *****************************************************************************
 *  The first box is a virtual box "root" and is the father for all first
 *  level boxes
 *****************************************************************************/
MP4_Box_t *MP4_BoxGetRoot( stream_t * );

/*****************************************************************************
 * MP4_FreeBox : free memory allocated after read with MP4_ReadBox
 *               or MP4_BoxGetRoot, this means also children boxes
 * XXX : all children have to be allocated by a malloc !! and
 *         p_box is freed
 *****************************************************************************/
void MP4_BoxFree( stream_t *, MP4_Box_t *p_box );

/*****************************************************************************
 * MP4_DumpBoxStructure: print the structure of the p_box
 *****************************************************************************
 * Usefull while debugging
 *****************************************************************************/
void MP4_BoxDumpStructure( stream_t *p_input, MP4_Box_t *p_box );


/*****************************************************************************
 * MP4_BoxGet: find a box given a path relative to p_box
 *****************************************************************************
 * Path Format: . .. / as usual
 *              [number] to specifie box number ex: trak[12]
 *
 * ex: /moov/trak[12]
 *     ../mdia
 *****************************************************************************/
MP4_Box_t *MP4_BoxGet( MP4_Box_t *p_box, char *psz_fmt, ... );

/*****************************************************************************
 * MP4_BoxCount: find number of box given a path relative to p_box
 *****************************************************************************
 * Path Format: . .. / as usual
 *              [number] to specifie box number ex: trak[12]
 *
 * ex: /moov/trak
 *     ../mdia
 *****************************************************************************/
int MP4_BoxCount( MP4_Box_t *p_box, char *psz_fmt, ... );

int MP4_ReadBoxCommon( stream_t *p_stream, MP4_Box_t *p_box );
int MP4_ReadBox_sample_vide( stream_t *p_stream, MP4_Box_t *p_box );
void MP4_FreeBox_sample_vide( MP4_Box_t *p_box );

#endif