[vlc-devel] [PATCH] Adding invmem decoder (first relase)
Robert Paciorek
robert at opcode.eu.org
Tue Dec 2 13:01:05 CET 2008
---
modules/codec/Modules.am | 1 +
modules/codec/invmem.c | 205 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 206 insertions(+), 0 deletions(-)
create mode 100644 modules/codec/invmem.c
diff --git a/modules/codec/Modules.am b/modules/codec/Modules.am
index 0f87d0d..999f0b8 100644
--- a/modules/codec/Modules.am
+++ b/modules/codec/Modules.am
@@ -25,6 +25,7 @@ SOURCES_png = png.c
SOURCES_svcdsub = svcdsub.c
SOURCES_cvdsub = cvdsub.c
SOURCES_fake = fake.c
+SOURCES_invmem = invmem.c
SOURCES_realaudio = realaudio.c
SOURCES_realvideo = realvideo.c
SOURCES_sdl_image = sdl_image.c
diff --git a/modules/codec/invmem.c b/modules/codec/invmem.c
new file mode 100644
index 0000000..848a84b
--- /dev/null
+++ b/modules/codec/invmem.c
@@ -0,0 +1,205 @@
+/*****************************************************************************
+ * invmem_decoder.c: memory video driver for vlc
+ *****************************************************************************
+ * Copyright (C) 2008 the VideoLAN team
+ * $Id$
+ *
+ * Authors: Robert Paciorek <robert at opcode.eu.org> <http://opcode.eu.org/bercik>
+ * based on:
+ * - vmem video output module (Gildas Bazin <gbazin at videolan.org>)
+ * - png video decodec module (Sam Hocevar <sam at zoy.org>)
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_codec.h>
+
+#include <vlc_image.h>
+#include <vlc_filter.h>
+#include <vlc_charset.h>
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int OpenDecoder ( vlc_object_t * );
+static void CloseDecoder ( vlc_object_t * );
+
+static picture_t *DecodeBlock ( decoder_t *, block_t ** );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+#define T_WIDTH N_( "Width" )
+#define LT_WIDTH N_( "Video memory buffer width." )
+
+#define T_HEIGHT N_( "Height" )
+#define LT_HEIGHT N_( "Video memory buffer height." )
+
+#define T_LOCK N_( "Lock function" )
+#define LT_LOCK N_( "Address of the locking callback function. This " \
+ "function must return a valid memory address for use " \
+ "by the video renderer." )
+
+#define T_UNLOCK N_( "Unlock function" )
+#define LT_UNLOCK N_( "Address of the unlocking callback function" )
+
+#define T_DATA N_( "Callback data" )
+#define LT_DATA N_( "Data for the locking and unlocking functions" )
+
+vlc_module_begin();
+ set_category( CAT_INPUT );
+ set_subcategory( SUBCAT_INPUT_VCODEC );
+ set_shortname( N_("Memory video decoder") );
+ set_description( N_("Memory video decoder") );
+ set_capability( "decoder", 1000 );
+ set_callbacks( OpenDecoder, CloseDecoder );
+ add_shortcut( "invmem" );
+
+ add_integer( "invmem-width", "0", NULL, T_WIDTH, LT_WIDTH, false );
+ add_integer( "invmem-height", "0", NULL, T_HEIGHT, LT_HEIGHT, false );
+ add_string( "invmem-lock", "0", NULL, T_LOCK, LT_LOCK, true );
+ add_string( "invmem-unlock", "0", NULL, T_UNLOCK, LT_UNLOCK, true );
+ add_string( "invmem-data", "0", NULL, T_DATA, LT_DATA, true );
+vlc_module_end();
+
+
+struct decoder_sys_t
+{
+ void * (*pf_lock) (void *);
+ void (*pf_unlock) (void *);
+ void *p_data;
+
+ int i_width;
+ int i_height;
+
+ picture_t *p_pic
+};
+
+
+/*****************************************************************************
+ * OpenDecoder: probe the decoder and return score
+ *****************************************************************************/
+static int OpenDecoder( vlc_object_t *p_this )
+{
+ decoder_t *p_dec = (decoder_t*)p_this;
+ decoder_sys_t *p_sys;
+ char *psz_tmp;
+
+ msg_Dbg( p_dec, "Initialize INVMEM DECODER moduule" );
+
+ if( p_dec->fmt_in.i_codec != VLC_FOURCC('f','a','k','e'))
+ {
+ return VLC_EGENERIC;
+ }
+
+ /* Allocate the memory needed to store the decoder's structure */
+ if( ( p_dec->p_sys = p_sys =
+ (decoder_sys_t *)malloc(sizeof(decoder_sys_t)) ) == NULL )
+ return VLC_ENOMEM;
+
+ // get parametrs
+ p_sys->i_width = config_GetInt( p_this, "invmem-width" );
+ p_sys->i_height = config_GetInt( p_this, "invmem-height" );
+ if (p_sys->i_width == 0 || p_sys->i_height == 0) {
+ msg_Err( p_dec, "--vmem-width and --vmem-height must be > 0" );
+ return VLC_EGENERIC;
+ }
+
+ psz_tmp = config_GetPsz( p_dec, "invmem-lock" );
+ p_sys->pf_lock = (void * (*) (void *))(intptr_t)atoll( psz_tmp );
+ free( psz_tmp );
+
+ psz_tmp = config_GetPsz( p_dec, "invmem-unlock" );
+ p_sys->pf_unlock = (void (*) (void *))(intptr_t)atoll( psz_tmp );
+ free( psz_tmp );
+
+ psz_tmp = config_GetPsz( p_dec, "invmem-data" );
+ p_sys->p_data = (void *)(intptr_t)atoll( psz_tmp );
+ free( psz_tmp );
+
+ if( !p_sys->pf_lock || !p_sys->pf_unlock )
+ {
+ msg_Err( p_dec, "Invalid lock or unlock callbacks" );
+ return VLC_EGENERIC;
+ }
+
+ /* Set output properties */
+ p_dec->fmt_out.i_cat = VIDEO_ES;
+ //p_dec->fmt_out.i_codec = VLC_FOURCC('R','G','B','A');
+ p_dec->fmt_out.i_codec = VLC_FOURCC('R','V','2','4');
+ p_dec->fmt_out.video.i_width = p_dec->p_sys->i_width;
+ p_dec->fmt_out.video.i_height = p_dec->p_sys->i_height;
+ p_dec->fmt_out.video.i_aspect = VOUT_ASPECT_FACTOR * p_dec->p_sys->i_width / p_dec->p_sys->i_height;
+ p_dec->fmt_out.video.i_rmask = 0xff0000;
+ p_dec->fmt_out.video.i_gmask = 0x00ff00;
+ p_dec->fmt_out.video.i_bmask = 0x0000ff;
+ p_dec->fmt_out.i_cat = VIDEO_ES;
+
+ // create new picture
+ p_dec->p_sys->p_pic = p_dec->pf_vout_buffer_new( p_dec );
+
+ /* Set callbacks */
+ p_dec->pf_decode_video = DecodeBlock;
+
+ return VLC_SUCCESS;
+}
+
+/****************************************************************************
+ * DecodeBlock: the whole thing
+ ****************************************************************************
+ * This function must be fed with a complete compressed frame.
+ ****************************************************************************/
+static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
+{
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ if( !pp_block || !*pp_block ) return NULL;
+
+ // create new picture
+ picture_Release( p_dec->p_sys->p_pic );
+ p_dec->p_sys->p_pic = p_dec->pf_vout_buffer_new( p_dec );
+ p_dec->p_sys->p_pic->b_force = true;
+ p_dec->p_sys->p_pic->p->i_pitch = p_dec->p_sys->i_width*3;
+
+ // lock input and copy to picture
+ p_dec->p_sys->p_pic->p->p_pixels = p_dec->p_sys->pf_lock( p_dec->p_sys->p_data );
+
+ // unlock input
+ p_dec->p_sys->pf_unlock( p_dec->p_sys->p_data );
+
+ block_Release( *pp_block ); *pp_block = NULL;
+ return p_dec->p_sys->p_pic;
+}
+
+/*****************************************************************************
+ * CloseDecoder: png decoder destruction
+ *****************************************************************************/
+static void CloseDecoder( vlc_object_t *p_this )
+{
+ decoder_t *p_dec = (decoder_t *)p_this;
+ decoder_sys_t *p_sys = p_dec->p_sys;
+
+ free( p_sys );
+}
--
1.5.6.5
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