mirror of https://code.videolan.org/videolan/vlc
libvlc: Add a new more extensible struct libvlc_media_track_t
Due to the way this struct is allocated, it can be extended later without breaking ABI. Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
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@ -170,6 +170,52 @@ typedef struct libvlc_media_track_info_t
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} libvlc_media_track_info_t;
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typedef struct libvlc_audio_track_t
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{
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unsigned i_channels;
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unsigned i_rate;
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} libvlc_audio_track_t;
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typedef struct libvlc_video_track_t
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{
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unsigned i_height;
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unsigned i_width;
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unsigned i_sar_num;
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unsigned i_sar_den;
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unsigned i_frame_rate_num;
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unsigned i_frame_rate_den;
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} libvlc_video_track_t;
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typedef struct libvlc_subtitle_track_t
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{
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char *psz_encoding;
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} libvlc_subtitle_track_t;
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typedef struct libvlc_media_track_t
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{
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/* Codec fourcc */
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uint32_t i_codec;
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uint32_t i_original_fourcc;
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int i_id;
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libvlc_track_type_t i_type;
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/* Codec specific */
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int i_profile;
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int i_level;
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union {
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libvlc_audio_track_t *audio;
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libvlc_video_track_t *video;
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libvlc_subtitle_track_t *subtitle;
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};
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unsigned int i_bitrate;
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char *psz_language;
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char *psz_description;
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} libvlc_media_track_t;
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/**
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* Create a media with a certain given media resource location,
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* for instance a valid URL.
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@ -503,16 +549,51 @@ LIBVLC_API void *libvlc_media_get_user_data( libvlc_media_t *p_md );
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* before calling this function.
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* Not doing this will result in an empty array.
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*
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* \deprecated Use libvlc_media_tracks_get instead
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*
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* \param p_md media descriptor object
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* \param tracks address to store an allocated array of Elementary Streams
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* descriptions (must be freed by the caller) [OUT]
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*
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* \return the number of Elementary Streams
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*/
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LIBVLC_API
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LIBVLC_DEPRECATED LIBVLC_API
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int libvlc_media_get_tracks_info( libvlc_media_t *p_md,
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libvlc_media_track_info_t **tracks );
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/**
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* Get media descriptor's elementary streams description
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*
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* Note, you need to call libvlc_media_parse() or play the media at least once
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* before calling this function.
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* Not doing this will result in an empty array.
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*
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* \version LibVLC 2.1.0 and later.
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*
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* \param p_md media descriptor object
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* \param tracks address to store an allocated array of Elementary Streams
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* descriptions (must be freed with libvlc_media_tracks_release
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by the caller) [OUT]
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*
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* \return the number of Elementary Streams
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*/
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LIBVLC_API
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int libvlc_media_tracks_get( libvlc_media_t *p_md,
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libvlc_media_track_t ***tracks );
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/**
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* Release media descriptor's elementary streams description array
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*
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* \version LibVLC 2.1.0 and later.
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*
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* \param p_tracks tracks info array to release
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* \param i_count number of elements in the array
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*/
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LIBVLC_API
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void libvlc_media_tracks_release( libvlc_media_track_t **p_tracks,
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int i_count );
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/** @}*/
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# ifdef __cplusplus
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@ -168,6 +168,8 @@ libvlc_media_set_meta
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libvlc_media_set_state
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libvlc_media_set_user_data
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libvlc_media_subitems
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libvlc_media_tracks_get
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libvlc_media_tracks_release
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libvlc_new
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libvlc_playlist_play
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libvlc_release
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113
lib/media.c
113
lib/media.c
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@ -734,3 +734,116 @@ libvlc_media_get_tracks_info( libvlc_media_t *p_md, libvlc_media_track_info_t **
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vlc_mutex_unlock( &p_input_item->lock );
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return i_es;
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}
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int
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libvlc_media_tracks_get( libvlc_media_t *p_md, libvlc_media_track_t *** pp_es )
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{
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assert( p_md );
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input_item_t *p_input_item = p_md->p_input_item;
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vlc_mutex_lock( &p_input_item->lock );
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const int i_es = p_input_item->i_es;
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*pp_es = (i_es > 0) ? calloc( i_es, sizeof(**pp_es) ) : NULL;
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if( !*pp_es ) /* no ES, or OOM */
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{
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vlc_mutex_unlock( &p_input_item->lock );
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return 0;
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}
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/* Fill array */
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for( int i = 0; i < i_es; i++ )
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{
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libvlc_media_track_t *p_mes = calloc( 1, sizeof(*p_mes) );
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if ( p_mes )
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{
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p_mes->audio = malloc( __MAX(__MAX(sizeof(*p_mes->audio),
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sizeof(*p_mes->video)),
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sizeof(*p_mes->subtitle)) );
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}
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if ( !p_mes || !p_mes->audio )
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{
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libvlc_media_tracks_release( *pp_es, i_es );
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*pp_es = NULL;
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return 0;
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}
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(*pp_es)[i] = p_mes;
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const es_format_t *p_es = p_input_item->es[i];
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p_mes->i_codec = p_es->i_codec;
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p_mes->i_original_fourcc = p_es->i_original_fourcc;
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p_mes->i_id = p_es->i_id;
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p_mes->i_profile = p_es->i_profile;
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p_mes->i_level = p_es->i_level;
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p_mes->i_bitrate = p_es->i_bitrate;
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p_mes->psz_language = p_es->psz_language != NULL ? strdup(p_es->psz_language) : NULL;
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p_mes->psz_description = p_es->psz_description != NULL ? strdup(p_es->psz_description) : NULL;
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switch(p_es->i_cat)
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{
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case UNKNOWN_ES:
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default:
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p_mes->i_type = libvlc_track_unknown;
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break;
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case VIDEO_ES:
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p_mes->i_type = libvlc_track_video;
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p_mes->video->i_height = p_es->video.i_height;
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p_mes->video->i_width = p_es->video.i_width;
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p_mes->video->i_sar_num = p_es->video.i_sar_num;
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p_mes->video->i_sar_den = p_es->video.i_sar_den;
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p_mes->video->i_frame_rate_num = p_es->video.i_frame_rate;
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p_mes->video->i_frame_rate_den = p_es->video.i_frame_rate_base;
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break;
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case AUDIO_ES:
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p_mes->i_type = libvlc_track_audio;
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p_mes->audio->i_channels = p_es->audio.i_channels;
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p_mes->audio->i_rate = p_es->audio.i_rate;
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break;
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case SPU_ES:
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p_mes->i_type = libvlc_track_text;
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p_mes->subtitle->psz_encoding = p_es->subs.psz_encoding != NULL ?
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strdup(p_es->subs.psz_encoding) : NULL;
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break;
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}
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}
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vlc_mutex_unlock( &p_input_item->lock );
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return i_es;
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}
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/**************************************************************************
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* Release media descriptor's elementary streams description array
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**************************************************************************/
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void libvlc_media_tracks_release( libvlc_media_track_t **p_tracks, int i_count )
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{
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if( !p_tracks )
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return;
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for( int i = 0; i < i_count; ++i )
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{
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if ( !p_tracks[i] )
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continue;
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free( p_tracks[i]->psz_language );
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free( p_tracks[i]->psz_description );
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switch( p_tracks[i]->i_type )
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{
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case libvlc_track_audio:
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break;
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case libvlc_track_video:
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break;
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case libvlc_track_text:
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free( p_tracks[i]->subtitle->psz_encoding );
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break;
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case libvlc_track_unknown:
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default:
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break;
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}
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free( p_tracks[i]->audio );
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free( p_tracks[i] );
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}
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free( p_tracks );
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}
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