mirror of https://code.videolan.org/videolan/vlc
259 lines
7.0 KiB
C
259 lines
7.0 KiB
C
/*****************************************************************************
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* picture.c: libvlc API picture management
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*****************************************************************************
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* Copyright (C) 2018 VLC authors and VideoLAN
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*
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* Authors: Hugo Beauzée-Luyssen <hugo@beauzee.fr>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdckdint.h>
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#include <vlc/libvlc.h>
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#include <vlc/libvlc_picture.h>
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#include "libvlc_internal.h"
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#include <vlc_atomic.h>
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#include <vlc_picture.h>
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#include <vlc_block.h>
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#include <vlc_image.h>
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#include <vlc_input.h>
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#include <vlc_fs.h>
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#include "picture_internal.h"
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struct libvlc_picture_t
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{
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vlc_atomic_rc_t rc;
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libvlc_picture_type_t type;
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block_t* converted;
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video_format_t fmt;
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libvlc_time_t time;
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input_attachment_t* attachment;
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};
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struct libvlc_picture_list_t
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{
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size_t count;
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libvlc_picture_t* pictures[];
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};
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libvlc_picture_t* libvlc_picture_new( vlc_object_t* p_obj, picture_t* input,
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libvlc_picture_type_t type,
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unsigned int width, unsigned int height,
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bool crop )
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{
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libvlc_picture_t *pic = malloc( sizeof( *pic ) );
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if ( unlikely( pic == NULL ) )
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return NULL;
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vlc_atomic_rc_init( &pic->rc );
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pic->type = type;
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pic->time = libvlc_time_from_vlc_tick( input->date );
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pic->attachment = NULL;
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static const vlc_fourcc_t table[] = {
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[libvlc_picture_Jpg] = VLC_CODEC_JPEG,
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[libvlc_picture_Png] = VLC_CODEC_PNG,
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[libvlc_picture_Argb] = VLC_CODEC_ARGB,
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[libvlc_picture_WebP] = VLC_CODEC_WEBP,
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};
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assert(ARRAY_SIZE(table) > type && table[type] != 0);
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vlc_fourcc_t format = table[type];
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if ( picture_Export( p_obj, &pic->converted, &pic->fmt,
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input, format, width, height, crop ) != VLC_SUCCESS )
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{
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free( pic );
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return NULL;
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}
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return pic;
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}
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static void libvlc_picture_block_release( block_t* block )
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{
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free( block );
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}
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static const struct vlc_block_callbacks block_cbs =
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{
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libvlc_picture_block_release,
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};
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static bool IsSupportedByLibVLC(vlc_fourcc_t fcc)
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{
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switch (fcc)
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{
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case VLC_CODEC_PNG:
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case VLC_CODEC_JPEG:
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case VLC_CODEC_WEBP:
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return true;
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default:
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return false;
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}
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}
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static libvlc_picture_t* libvlc_picture_from_attachment( input_attachment_t* attachment )
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{
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vlc_fourcc_t fcc = image_Mime2Fourcc( attachment->psz_mime );
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if (!IsSupportedByLibVLC(fcc))
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return NULL;
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libvlc_picture_t *pic = malloc( sizeof( *pic ) );
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if ( unlikely( pic == NULL ) )
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return NULL;
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pic->converted = block_New(&block_cbs, attachment->p_data,
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attachment->i_data);
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if ( unlikely( pic->converted == NULL ) )
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{
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free(pic);
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return NULL;
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}
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vlc_atomic_rc_init( &pic->rc );
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pic->attachment = vlc_input_attachment_Hold( attachment );
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pic->time = VLC_TICK_INVALID;
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video_format_Init( &pic->fmt, 0 );
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switch ( fcc )
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{
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case VLC_CODEC_PNG:
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pic->type = libvlc_picture_Png;
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break;
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case VLC_CODEC_JPEG:
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pic->type = libvlc_picture_Jpg;
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break;
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case VLC_CODEC_WEBP:
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pic->type = libvlc_picture_WebP;
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break;
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default:
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vlc_assert_unreachable();
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}
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return pic;
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}
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libvlc_picture_t *libvlc_picture_retain( libvlc_picture_t* pic )
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{
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vlc_atomic_rc_inc( &pic->rc );
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return pic;
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}
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void libvlc_picture_release( libvlc_picture_t* pic )
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{
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if ( vlc_atomic_rc_dec( &pic->rc ) == false )
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return;
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video_format_Clean( &pic->fmt );
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if ( pic->converted )
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block_Release( pic->converted );
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if ( pic->attachment )
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vlc_input_attachment_Release( pic->attachment );
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free( pic );
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}
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int libvlc_picture_save( const libvlc_picture_t* pic, const char* path )
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{
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FILE* file = vlc_fopen( path, "wb" );
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if ( !file )
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return -1;
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size_t res = fwrite( pic->converted->p_buffer,
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pic->converted->i_buffer, 1, file );
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fclose( file );
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return res == 1 ? 0 : -1;
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}
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const unsigned char* libvlc_picture_get_buffer( const libvlc_picture_t* pic,
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size_t *size )
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{
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assert( size != NULL );
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*size = pic->converted->i_buffer;
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return pic->converted->p_buffer;
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}
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libvlc_picture_type_t libvlc_picture_type( const libvlc_picture_t* pic )
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{
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return pic->type;
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}
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unsigned int libvlc_picture_get_stride( const libvlc_picture_t *pic )
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{
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assert( pic->type == libvlc_picture_Argb );
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return pic->fmt.i_width * 4;
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}
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unsigned int libvlc_picture_get_width( const libvlc_picture_t* pic )
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{
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return pic->fmt.i_visible_width;
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}
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unsigned int libvlc_picture_get_height( const libvlc_picture_t* pic )
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{
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return pic->fmt.i_visible_height;
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}
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libvlc_time_t libvlc_picture_get_time( const libvlc_picture_t* pic )
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{
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return pic->time;
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}
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libvlc_picture_list_t* libvlc_picture_list_from_attachments( input_attachment_t* const* attachments,
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size_t nb_attachments )
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{
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size_t size = 0;
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libvlc_picture_list_t* list;
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if (ckd_mul(&size, nb_attachments, sizeof (libvlc_picture_t *)) ||
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ckd_add(&size, sizeof (*list), size))
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return NULL;
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list = malloc( size );
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if ( !list )
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return NULL;
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list->count = 0;
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for ( size_t i = 0; i < nb_attachments; ++i )
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{
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input_attachment_t* a = attachments[i];
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libvlc_picture_t *pic = libvlc_picture_from_attachment( a );
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if( !pic )
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continue;
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list->pictures[list->count] = pic;
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list->count++;
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}
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return list;
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}
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size_t libvlc_picture_list_count( const libvlc_picture_list_t* list )
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{
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assert( list );
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return list->count;
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}
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libvlc_picture_t* libvlc_picture_list_at( const libvlc_picture_list_t* list,
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size_t index )
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{
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assert( list );
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return list->pictures[index];
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}
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void libvlc_picture_list_destroy( libvlc_picture_list_t* list )
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{
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if ( !list )
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return;
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for ( size_t i = 0; i < list->count; ++i )
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libvlc_picture_release( list->pictures[i] );
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free( list );
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}
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