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/*
* Copyright (C) 2012 Xidorn Quan
*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdlib.h>
#include "config.h"
#include "mp_msg.h"
#include "vd_internal.h"
static const vd_info_t info = {
"black video generator",
"black",
"",
"Xidorn Quan",
"no decoding, always outputs black frames"
};
LIBVD_EXTERN(black)
typedef struct {
unsigned char *planes[MP_MAX_PLANES];
int stride[MP_MAX_PLANES];
int buffer_filled;
int w, h;
} vd_black_ctx;
static const unsigned int fmt_list[] = {
IMGFMT_YV12,
IMGFMT_IYUV,
IMGFMT_I420,
IMGFMT_UYVY,
IMGFMT_YUY2,
IMGFMT_BGR24,
IMGFMT_RGB24,
0
};
// to set/get/query special features/parameters
static int control(sh_video_t *sh, int cmd, void *arg, ...)
{
unsigned int format;
const unsigned int *p;
switch (cmd) {
case VDCTRL_QUERY_FORMAT:
format = *(unsigned int *)arg;
for (p = fmt_list; *p; ++p)
if (format == *p)
return CONTROL_TRUE;
return CONTROL_FALSE;
}
return CONTROL_UNKNOWN;
}
// init driver
static int init(sh_video_t *sh)
{
unsigned int format;
vd_black_ctx *ctx;
int w, h;
int i;
ctx = sh->context = calloc(1, sizeof(*ctx));
if (!ctx)
return 0;
ctx->w = w = sh->disp_w;
ctx->h = h = sh->disp_h;
if (!mpcodecs_config_vo(sh, w, h, IMGFMT_BGR24))
goto error;
format = sh->codec->outfmt[sh->outfmtidx];
mp_msg(MSGT_DECVIDEO, MSGL_INFO, "[vd_black] format: %s\n", vo_format_name(format));
switch (format) {
case IMGFMT_RGB24:
case IMGFMT_BGR24:
ctx->planes[0] = malloc(w * h * 3);
if (!ctx->planes[0])
goto error;
ctx->stride[0] = w * 3;
memset(ctx->planes[0], 0, w * h * 3);
break;
case IMGFMT_UYVY:
case IMGFMT_YUY2:
ctx->planes[0] = malloc(w * h * 2);
ctx->stride[0] = w * 2;
if (format == IMGFMT_UYVY) {
for (i = 0; i < w * h * 2; i += 4) {
ctx->planes[0][i + 0] = 128;
ctx->planes[0][i + 1] = 16;
ctx->planes[0][i + 2] = 128;
ctx->planes[0][i + 3] = 16;
}
} else {
for (i = 0; i < w * h * 2; i += 4) {
ctx->planes[0][i + 0] = 16;
ctx->planes[0][i + 1] = 128;
ctx->planes[0][i + 2] = 16;
ctx->planes[0][i + 3] = 128;
}
}
break;
case IMGFMT_YV12:
case IMGFMT_IYUV:
case IMGFMT_I420:
ctx->planes[0] = malloc(w * h);
ctx->planes[1] = malloc(w * h / 4);
ctx->planes[2] = malloc(w * h / 4);
if (!ctx->planes[0] || !ctx->planes[1] || !ctx->planes[2])
goto error;
ctx->stride[0] = w;
ctx->stride[1] = w / 2;
ctx->stride[2] = w / 2;
memset(ctx->planes[0], 16, w * h);
memset(ctx->planes[1], 128, w * h / 4);
memset(ctx->planes[2], 128, w * h / 4);
break;
default:
goto error;
}
return 1;
error:
uninit(sh);
return 0;
}
// uninit driver
static void uninit(sh_video_t *sh)
{
int i;
vd_black_ctx *ctx = sh->context;
for (i = 0; i < MP_MAX_PLANES; ++i) {
free(ctx->planes[i]);
ctx->planes[i] = NULL;
}
free(ctx);
}
// decode a frame
static mp_image_t* decode(sh_video_t *sh, void *data, int len, int flags)
{
mp_image_t *mpi = NULL;
vd_black_ctx *ctx = sh->context;
int i;
if (sh->num_buffered_pts == FF_ARRAY_ELEMS(sh->buffered_pts) - 1)
ctx->buffer_filled = 1;
if (!ctx->buffer_filled || !sh->num_buffered_pts)
return NULL;
mpi = mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, MP_IMGFLAG_PRESERVE,
ctx->w, ctx->h);
if (!mpi)
return NULL;
for (i = 0; i < MP_MAX_PLANES; ++i) {
mpi->planes[i] = ctx->planes[i];
mpi->stride[i] = ctx->stride[i];
}
return mpi;
}
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