/*****************************************************************************
* vlc_es.h: Elementary stream formats descriptions
*****************************************************************************
* Copyright (C) 1999-2001 VLC authors and VideoLAN
* $Id: d80ec4d0bdf24100fcafd3536cee346e8dbd060d $
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef VLC_ES_H
#define VLC_ES_H 1
#include <vlc_fourcc.h>
/**
* \file
* This file defines the elementary streams format types
*/
/**
* video palette data
* \see video_format_t
* \see subs_format_t
*/
struct video_palette_t
{
int i_entries; /**< to keep the compatibility with ffmpeg's palette */
uint8_t palette[256][4]; /**< 4-byte RGBA/YUVA palette */
};
/**
* audio replay gain description
*/
#define AUDIO_REPLAY_GAIN_MAX (2)
#define AUDIO_REPLAY_GAIN_TRACK (0)
#define AUDIO_REPLAY_GAIN_ALBUM (1)
typedef struct
{
/* true if we have the peak value */
bool pb_peak[AUDIO_REPLAY_GAIN_MAX];
/* peak value where 1.0 means full sample value */
float pf_peak[AUDIO_REPLAY_GAIN_MAX];
/* true if we have the gain value */
bool pb_gain[AUDIO_REPLAY_GAIN_MAX];
/* gain value in dB */
float pf_gain[AUDIO_REPLAY_GAIN_MAX];
} audio_replay_gain_t;
/**
* audio format description
*/
struct audio_format_t
{
vlc_fourcc_t i_format; /**< audio format fourcc */
unsigned int i_rate; /**< audio sample-rate */
/* Describes the channels configuration of the samples (ie. number of
* channels which are available in the buffer, and positions). */
uint32_t i_physical_channels;
/* Describes from which original channels, before downmixing, the
* buffer is derived. */
uint32_t i_original_channels;
/* Optional - for A/52, SPDIF and DTS types : */
/* Bytes used by one compressed frame, depends on bitrate. */
unsigned int i_bytes_per_frame;
/* Number of sampleframes contained in one compressed frame. */
unsigned int i_frame_length;
/* Please note that it may be completely arbitrary - buffers are not
* obliged to contain a integral number of so-called "frames". It's
* just here for the division :
* buffer_size = i_nb_samples * i_bytes_per_frame / i_frame_length
*/
/* FIXME ? (used by the codecs) */
unsigned i_bitspersample;
unsigned i_blockalign;
uint8_t i_channels; /* must be <=32 */
};
/**
* video format description
*/
struct video_format_t
{
vlc_fourcc_t i_chroma; /**< picture chroma */
unsigned int i_width; /**< picture width */
unsigned int i_height; /**< picture height */
unsigned int i_x_offset; /**< start offset of visible area */
unsigned int i_y_offset; /**< start offset of visible area */
unsigned int i_visible_width; /**< width of visible area */
unsigned int i_visible_height; /**< height of visible area */
unsigned int i_bits_per_pixel; /**< number of bits per pixel */
unsigned int i_sar_num; /**< sample/pixel aspect ratio */
unsigned int i_sar_den;
unsigned int i_frame_rate; /**< frame rate numerator */
unsigned int i_frame_rate_base; /**< frame rate denominator */
uint32_t i_rmask, i_gmask, i_bmask; /**< color masks for RGB chroma */
int i_rrshift, i_lrshift;
int i_rgshift, i_lgshift;
int i_rbshift, i_lbshift;
video_palette_t *p_palette; /**< video palette from demuxer */
};
/**
* Initialize a video_format_t structure with chroma 'i_chroma'
* \param p_src pointer to video_format_t structure
* \param i_chroma chroma value to use
*/
static inline void video_format_Init( video_format_t *p_src, vlc_fourcc_t i_chroma )
{
memset( p_src, 0, sizeof( video_format_t ) );
p_src->i_chroma = i_chroma;
p_src->i_sar_num = p_src->i_sar_den = 1;
p_src->p_palette = NULL;
}
/**
* Copy video_format_t including the palette
* \param p_dst video_format_t to copy to
* \param p_src video_format_t to copy from
*/
static inline int video_format_Copy( video_format_t *p_dst, const video_format_t *p_src )
{
memcpy( p_dst, p_src, sizeof( *p_dst ) );
if( p_src->p_palette )
{
p_dst->p_palette = (video_palette_t *) malloc( sizeof( video_palette_t ) );
if( !p_dst->p_palette )
return VLC_ENOMEM;
memcpy( p_dst->p_palette, p_src->p_palette, sizeof( *p_dst->p_palette ) );
}
return VLC_SUCCESS;
}
/**
* Cleanup and free palette of this video_format_t
* \param p_src video_format_t structure to clean
*/
static inline void video_format_Clean( video_format_t *p_src )
{
free( p_src->p_palette );
memset( p_src, 0, sizeof( video_format_t ) );
p_src->p_palette = NULL;
}
/**
* It will fill up a video_format_t using the given arguments.
* Note that the video_format_t must already be initialized.
*/
VLC_API void video_format_Setup( video_format_t *, vlc_fourcc_t i_chroma, int i_width, int i_height, int i_sar_num, int i_sar_den );
/**
* It will copy the crop properties from a video_format_t to another.
*/
VLC_API void video_format_CopyCrop( video_format_t *, const video_format_t * );
/**
* It will compute the crop/ar properties when scaling.
*/
VLC_API void video_format_ScaleCropAr( video_format_t *, const video_format_t * );
/**
* This function will check if the first video format is similar
* to the second one.
*/
VLC_API bool video_format_IsSimilar( const video_format_t *, const video_format_t * );
/**
* It prints details about the given video_format_t
*/
VLC_API void video_format_Print( vlc_object_t *, const char *, const video_format_t * );
/**
* subtitles format description
*/
struct subs_format_t
{
/* the character encoding of the text of the subtitle.
* all gettext recognized shorts can be used */
char *psz_encoding;
int i_x_origin; /**< x coordinate of the subtitle. 0 = left */
int i_y_origin; /**< y coordinate of the subtitle. 0 = top */
struct
{
/* */
uint32_t palette[16+1];
/* the width of the original movie the spu was extracted from */
int i_original_frame_width;
/* the height of the original movie the spu was extracted from */
int i_original_frame_height;
} spu;
struct
{
int i_id;
} dvb;
struct
{
int i_magazine;
int i_page;
} teletext;
};
/**
* ES language definition
*/
typedef struct extra_languages_t
{
char *psz_language;
char *psz_description;
} extra_languages_t;
/**
* ES format definition
*/
struct es_format_t
{
int i_cat; /**< ES category @see es_format_category_e */
vlc_fourcc_t i_codec; /**< FOURCC value as used in vlc */
vlc_fourcc_t i_original_fourcc; /**< original FOURCC from the container */
int i_id; /**< es identifier, where means
-1: let the core mark the right id
>=0: valid id */
int i_group; /**< group identifier, where means:
-1 : standalone
>= 0 then a "group" (program) is created
for each value */
int i_priority; /**< priority, where means:
-2 : mean not selectable by the users
-1 : mean not selected by default even
when no other stream
>=0: priority */
char *psz_language; /**< human readible language name */
char *psz_description; /**< human readible description of language */
int i_extra_languages; /**< length in bytes of extra language data pointer */
extra_languages_t *p_extra_languages; /**< extra language data needed by some decoders */
audio_format_t audio; /**< description of audio format */
audio_replay_gain_t audio_replay_gain; /*< audio replay gain information */
video_format_t video; /**< description of video format */
subs_format_t subs; /**< description of subtitle format */
unsigned int i_bitrate; /**< bitrate of this ES */
int i_profile; /**< codec specific information (like real audio flavor, mpeg audio layer, h264 profile ...) */
int i_level; /**< codec specific information: indicates maximum restrictions on the stream (resolution, bitrate, codec features ...) */
bool b_packetized; /**< wether the data is packetized (ie. not truncated) */
int i_extra; /**< length in bytes of extra data pointer */
void *p_extra; /**< extra data needed by some decoders or muxers */
};
/** ES Categories */
enum es_format_category_e
{
UNKNOWN_ES = 0x00,
VIDEO_ES = 0x01,
AUDIO_ES = 0x02,
SPU_ES = 0x03,
NAV_ES = 0x04,
};
/**
* This function will fill all RGB shift from RGB masks.
*/
VLC_API void video_format_FixRgb( video_format_t * );
/**
* This function will initialize a es_format_t structure.
*/
VLC_API void es_format_Init( es_format_t *, int i_cat, vlc_fourcc_t i_codec );
/**
* This function will initialize a es_format_t structure from a video_format_t.
*/
VLC_API void es_format_InitFromVideo( es_format_t *, const video_format_t * );
/**
* This functions will copy a es_format_t.
*/
VLC_API int es_format_Copy( es_format_t *p_dst, const es_format_t *p_src );
/**
* This function will clean up a es_format_t and release all associated
* resources.
* You can call it multiple times on the same structure.
*/
VLC_API void es_format_Clean( es_format_t *fmt );
/**
* This function will check if the first ES format is similar
* to the second one.
*
* All descriptive fields are ignored.
*/
VLC_API bool es_format_IsSimilar( const es_format_t *, const es_format_t * );
#endif
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