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vlc/modules/video_output/yuv.c
Rémi Denis-Courmont 5f68da68a5 No full point at end of configuration item short text
2010-02-15 00:01:48 +02:00

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/*****************************************************************************
* yuv.c : yuv video output
*****************************************************************************
* Copyright (C) 2008, M2X BV
* $Id$
*
* Authors: Jean-Paul Saman <jpsaman@videolan.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_vout_display.h>
#include <vlc_picture_pool.h>
#include <vlc_fs.h>
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define YUV_FILE_TEXT N_("device, fifo or filename")
#define YUV_FILE_LONGTEXT N_("device, fifo or filename to write yuv frames too.")
#define CHROMA_TEXT N_("Chroma used")
#define CHROMA_LONGTEXT N_(\
"Force use of a specific chroma for output. Default is I420.")
#define YUV4MPEG2_TEXT N_("YUV4MPEG2 header (default disabled)")
#define YUV4MPEG2_LONGTEXT N_("The YUV4MPEG2 header is compatible " \
"with mplayer yuv video ouput and requires YV12/I420 fourcc. By default "\
"vlc writes the fourcc of the picture frame into the output destination.")
#define CFG_PREFIX "yuv-"
static int Open (vlc_object_t *);
static void Close(vlc_object_t *);
vlc_module_begin()
set_shortname(N_("YUV output"))
set_description(N_("YUV video output"))
set_category(CAT_VIDEO)
set_subcategory(SUBCAT_VIDEO_VOUT)
set_capability("vout display", 0)
add_string(CFG_PREFIX "file", "stream.yuv", NULL,
YUV_FILE_TEXT, YUV_FILE_LONGTEXT, false)
add_string(CFG_PREFIX "chroma", NULL, NULL,
CHROMA_TEXT, CHROMA_LONGTEXT, true)
add_bool (CFG_PREFIX "yuv4mpeg2", false, NULL,
YUV4MPEG2_TEXT, YUV4MPEG2_LONGTEXT, true)
set_callbacks(Open, Close)
vlc_module_end()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static const char *const ppsz_vout_options[] = {
"file", "chroma", "yuv4mpeg2", NULL
};
/* */
static picture_pool_t *Pool (vout_display_t *, unsigned);
static void Display(vout_display_t *, picture_t *);
static int Control(vout_display_t *, int, va_list);
static void Manage (vout_display_t *);
/*****************************************************************************
* vout_display_sys_t: video output descriptor
*****************************************************************************/
struct vout_display_sys_t {
FILE *f;
bool is_first;
bool is_yuv4mpeg2;
picture_pool_t *pool;
};
/* */
static int Open(vlc_object_t *object)
{
vout_display_t *vd = (vout_display_t *)object;
vout_display_sys_t *sys;
/* Allocate instance and initialize some members */
vd->sys = sys = malloc(sizeof(*sys));
if (!sys)
return VLC_ENOMEM;
sys->is_first = false;
sys->is_yuv4mpeg2 = var_CreateGetBool(vd, CFG_PREFIX "yuv4mpeg2");
sys->pool = NULL;
/* */
char *psz_fcc = var_CreateGetNonEmptyString(vd, CFG_PREFIX "chroma");
const vlc_fourcc_t requested_chroma = vlc_fourcc_GetCodecFromString(VIDEO_ES,
psz_fcc);
free(psz_fcc);
const vlc_fourcc_t chroma = requested_chroma ? requested_chroma :
VLC_CODEC_I420;
if (sys->is_yuv4mpeg2) {
switch (chroma) {
case VLC_CODEC_YV12:
case VLC_CODEC_I420:
case VLC_CODEC_J420:
break;
default:
msg_Err(vd, "YUV4MPEG2 mode needs chroma YV12 not %4.4s as requested",
(char *)&chroma);
free(sys);
return VLC_EGENERIC;
}
}
msg_Dbg(vd, "Using chroma %4.4s", (char *)&chroma);
/* */
char *name = var_CreateGetNonEmptyString(vd, CFG_PREFIX "file");
if (!name) {
msg_Err(vd, "Empty file name");
free(sys);
return VLC_EGENERIC;
}
sys->f = vlc_fopen(name, "wb");
if (!sys->f) {
msg_Err(vd, "Failed to open %s", name);
free(name);
free(sys);
return VLC_EGENERIC;
}
msg_Dbg(vd, "Writing data to %s", name);
free(name);
/* */
video_format_t fmt = vd->fmt;
fmt.i_chroma = chroma;
video_format_FixRgb(&fmt);
/* */
vout_display_info_t info = vd->info;
info.has_hide_mouse = true;
/* */
vd->fmt = fmt;
vd->info = info;
vd->pool = Pool;
vd->prepare = NULL;
vd->display = Display;
vd->control = Control;
vd->manage = Manage;
vout_display_SendEventFullscreen(vd, false);
return VLC_SUCCESS;
}
/* */
static void Close(vlc_object_t *object)
{
vout_display_t *vd = (vout_display_t *)object;
vout_display_sys_t *sys = vd->sys;
if (sys->pool)
picture_pool_Delete(sys->pool);
fclose(sys->f);
free(sys);
}
/*****************************************************************************
*
*****************************************************************************/
static picture_pool_t *Pool(vout_display_t *vd, unsigned count)
{
vout_display_sys_t *sys = vd->sys;
if (!sys->pool)
sys->pool = picture_pool_NewFromFormat(&vd->fmt, count);
return sys->pool;
}
static void Display(vout_display_t *vd, picture_t *picture)
{
vout_display_sys_t *sys = vd->sys;
/* */
video_format_t fmt = vd->fmt;
fmt.i_sar_num = vd->source.i_sar_num;
fmt.i_sar_den = vd->source.i_sar_den;
/* */
char type;
if (picture->b_progressive)
type = 'p';
else if (picture->b_top_field_first)
type = 't';
else
type = 'b';
if (type != 'p') {
msg_Warn(vd, "Received a non progressive frame, "
"it will be written as progressive.");
type = 'p';
}
/* */
if (!sys->is_first) {
const char *header;
char buffer[5];
if (sys->is_yuv4mpeg2) {
/* MPlayer compatible header, unfortunately it doesn't tell you
* the exact fourcc used. */
header = "YUV4MPEG2";
} else {
snprintf(buffer, sizeof(buffer), "%4.4s",
(const char*)&fmt.i_chroma);
header = buffer;
}
fprintf(sys->f, "%s W%d H%d F%d:%d I%c A%d:%d\n",
header,
fmt.i_visible_width, fmt.i_visible_height,
fmt.i_frame_rate, fmt.i_frame_rate_base,
type,
fmt.i_sar_num, fmt.i_sar_den);
sys->is_first = true;
}
/* */
fprintf(sys->f, "FRAME\n");
for (int i = 0; i < picture->i_planes; i++) {
const plane_t *plane = &picture->p[i];
for( int y = 0; y < plane->i_visible_lines; y++) {
const size_t written = fwrite(&plane->p_pixels[y*plane->i_pitch],
1, plane->i_visible_pitch, sys->f);
if (written != (size_t)plane->i_visible_pitch)
msg_Warn(vd, "only %zd of %d bytes written",
written, plane->i_visible_pitch);
}
}
fflush(sys->f);
/* */
picture_Release(picture);
}
static int Control(vout_display_t *vd, int query, va_list args)
{
VLC_UNUSED(vd);
switch (query) {
case VOUT_DISPLAY_CHANGE_FULLSCREEN: {
const vout_display_cfg_t *cfg = va_arg(args, const vout_display_cfg_t *);
if (cfg->is_fullscreen)
return VLC_EGENERIC;
return VLC_SUCCESS;
}
default:
return VLC_EGENERIC;
}
}
static void Manage (vout_display_t *vd)
{
VLC_UNUSED(vd);
}
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