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mpv/libmpcodecs/vf_dlopen.c

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/*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "config.h"
#include "mp_msg.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "m_option.h"
#include "m_struct.h"
#include "vf_dlopen.h"
#ifdef _WIN32
# include <windows.h>
# define DLLOpen(name) LoadLibrary(name)
# define DLLClose(handle) FreeLibrary(handle)
# define DLLSymbol(handle, name) ((void *)GetProcAddress(handle, name))
#else
# include <dlfcn.h>
# define DLLOpen(name) dlopen(name, RTLD_NOW)
# define DLLClose(handle) dlclose(handle)
# define DLLSymbol(handle, name) dlsym(handle, name)
#endif
static struct vf_priv_s {
const char *cfg_dllname;
int cfg_argc;
const char *cfg_argv[4];
void *dll;
struct vf_dlopen_context filter;
// output mp_image_t stuff
mp_image_t *outpic[FILTER_MAX_OUTCNT];
// generic
unsigned int out_cnt, out_width, out_height;
// multi frame output
unsigned int outbufferpos;
unsigned int outbufferlen;
mp_image_t *outbuffermpi;
// qscale buffer
unsigned char *qbuffer;
size_t qbuffersize;
unsigned int outfmt;
int argc;
} const vf_priv_dflt = {};
//===========================================================================//
static void set_imgprop(struct vf_dlopen_picdata *out, const mp_image_t *mpi)
{
int i;
out->planes = mpi->num_planes;
for (i = 0; i < mpi->num_planes; ++i) {
out->plane[i] = mpi->planes[i];
out->planestride[i] = mpi->stride[i];
out->planewidth[i] =
i ? (/*mpi->chroma_width*/ mpi->w >> mpi->chroma_x_shift) : mpi->w;
out->planeheight[i] =
i ? (/*mpi->chroma_height*/ mpi->h >> mpi->chroma_y_shift) : mpi->h;
out->planexshift[i] = i ? mpi->chroma_x_shift : 0;
out->planeyshift[i] = i ? mpi->chroma_y_shift : 0;
}
}
static int config(struct vf_instance *vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int fmt)
{
vf->priv->filter.in_width = width;
vf->priv->filter.in_height = height;
vf->priv->filter.in_d_width = d_width;
vf->priv->filter.in_d_height = d_height;
vf->priv->filter.in_fmt = mp_imgfmt_to_name(fmt);
vf->priv->filter.out_width = width;
vf->priv->filter.out_height = height;
vf->priv->filter.out_d_width = d_width;
vf->priv->filter.out_d_height = d_height;
vf->priv->filter.out_fmt = NULL;
vf->priv->filter.out_cnt = 1;
if (!vf->priv->filter.in_fmt) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "invalid input/output format\n");
return 0;
}
if (vf->priv->filter.config && vf->priv->filter.config(&vf->priv->filter) < 0) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "filter config failed\n");
return 0;
}
// copy away stuff to sanity island
vf->priv->out_cnt = vf->priv->filter.out_cnt;
vf->priv->out_width = vf->priv->filter.out_width;
vf->priv->out_height = vf->priv->filter.out_height;
if (vf->priv->filter.out_fmt)
vf->priv->outfmt = mp_imgfmt_from_name(bstr0(vf->priv->filter.out_fmt),
false);
else {
struct vf_dlopen_formatpair *p = vf->priv->filter.format_mapping;
vf->priv->outfmt = 0;
if (p) {
for (; p->from; ++p) {
// TODO support pixel format classes in matching
if (!strcmp(p->from, vf->priv->filter.in_fmt)) {
vf->priv->outfmt = mp_imgfmt_from_name(bstr0(p->to), false);
break;
}
}
} else
vf->priv->outfmt = fmt;
vf->priv->filter.out_fmt = mp_imgfmt_to_name(vf->priv->outfmt);
}
if (!vf->priv->outfmt) {
mp_msg(MSGT_VFILTER, MSGL_ERR,
"filter config wants an unsupported output format\n");
return 0;
}
if (!vf->priv->out_cnt || vf->priv->out_cnt > FILTER_MAX_OUTCNT) {
mp_msg(MSGT_VFILTER, MSGL_ERR,
"filter config wants to yield zero or too many output frames\n");
return 0;
}
if (vf->priv->out_cnt >= 2) {
int i;
for (i = 0; i < vf->priv->out_cnt; ++i) {
vf->priv->outpic[i] =
alloc_mpi(vf->priv->out_width, vf->priv->out_height,
vf->priv->outfmt);
set_imgprop(&vf->priv->filter.outpic[i], vf->priv->outpic[i]);
}
}
return vf_next_config(vf, vf->priv->out_width,
vf->priv->out_height,
vf->priv->filter.out_d_width,
vf->priv->filter.out_d_height,
flags, vf->priv->outfmt);
}
static void uninit(struct vf_instance *vf)
{
if (vf->priv->filter.uninit)
vf->priv->filter.uninit(&vf->priv->filter);
memset(&vf->priv->filter, 0, sizeof(&vf->priv->filter));
if (vf->priv->dll) {
DLLClose(vf->priv->dll);
vf->priv->dll = NULL;
}
if (vf->priv->out_cnt >= 2) {
int i;
for (i = 0; i < vf->priv->out_cnt; ++i) {
free_mp_image(vf->priv->outpic[i]);
vf->priv->outpic[i] = NULL;
}
}
if (vf->priv->qbuffer) {
free(vf->priv->qbuffer);
vf->priv->qbuffer = NULL;
}
}
// NOTE: only called if (vf->priv->out_cnt >= 2) {
static int continue_put_image(struct vf_instance *vf)
{
int k;
int ret = 0;
mp_image_t *dmpi =
vf_get_image(vf->next, vf->priv->outfmt, MP_IMGTYPE_EXPORT, 0,
vf->priv->outpic[vf->priv->outbufferpos]->w,
vf->priv->outpic[vf->priv->outbufferpos]->h);
for (k = 0; k < vf->priv->outpic[vf->priv->outbufferpos]->num_planes;
++k) {
dmpi->planes[k] = vf->priv->outpic[vf->priv->outbufferpos]->planes[k];
dmpi->stride[k] = vf->priv->outpic[vf->priv->outbufferpos]->stride[k];
}
// pass through qscale if we can
vf_clone_mpi_attributes(dmpi, vf->priv->outbuffermpi);
ret =
vf_next_put_image(vf, dmpi,
vf->priv->filter.outpic[vf->priv->outbufferpos].pts);
++vf->priv->outbufferpos;
// more frames left?
if (vf->priv->outbufferpos < vf->priv->outbufferlen)
vf_queue_frame(vf, continue_put_image);
return ret;
}
static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
{
int i, k;
set_imgprop(&vf->priv->filter.inpic, mpi);
if (mpi->qscale) {
if (mpi->qscale_type != 0) {
k = mpi->qstride * ((mpi->height + 15) >> 4);
if (vf->priv->qbuffersize != k) {
vf->priv->qbuffer = realloc(vf->priv->qbuffer, k);
vf->priv->qbuffersize = k;
}
for (i = 0; i < k; ++i)
vf->priv->qbuffer[i] = norm_qscale(mpi->qscale[i],
mpi->qscale_type);
vf->priv->filter.inpic_qscale = vf->priv->qbuffer;
} else
vf->priv->filter.inpic_qscale = mpi->qscale;
vf->priv->filter.inpic_qscalestride = mpi->qstride;
vf->priv->filter.inpic_qscaleshift = 4;
} else {
vf->priv->filter.inpic_qscale = NULL;
vf->priv->filter.inpic_qscalestride = 0;
vf->priv->filter.inpic_qscaleshift = 0;
}
vf->priv->filter.inpic.pts = pts;
if (vf->priv->out_cnt >= 2) {
// more than one out pic
int ret = vf->priv->filter.put_image(&vf->priv->filter);
if (ret <= 0)
return ret;
vf->priv->outbuffermpi = mpi;
vf->priv->outbufferlen = ret;
vf->priv->outbufferpos = 0;
return continue_put_image(vf);
} else {
// efficient case: exactly one out pic
mp_image_t *dmpi =
vf_get_image(vf->next, vf->priv->outfmt,
MP_IMGTYPE_TEMP,
MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
vf->priv->out_width, vf->priv->out_height);
set_imgprop(&vf->priv->filter.outpic[0], dmpi);
int ret = vf->priv->filter.put_image(&vf->priv->filter);
if (ret <= 0)
return ret;
// pass through qscale if we can
vf_clone_mpi_attributes(dmpi, mpi);
return vf_next_put_image(vf, dmpi, vf->priv->filter.outpic[0].pts);
}
}
//===========================================================================//
static int query_format(struct vf_instance *vf, unsigned int fmt)
{
if (IMGFMT_IS_HWACCEL(fmt) || fmt == IMGFMT_MJPEG || fmt == IMGFMT_MPEGPES)
return 0; // these can't really be filtered
if (fmt == IMGFMT_RGB8 || fmt == IMGFMT_BGR8)
return 0; // we don't have palette support, sorry
const char *fmtname = mp_imgfmt_to_name(fmt);
if (!fmtname)
return 0;
struct vf_dlopen_formatpair *p = vf->priv->filter.format_mapping;
unsigned int outfmt = 0;
if (p) {
for (; p->from; ++p) {
// TODO support pixel format classes in matching
if (!strcmp(p->from, fmtname)) {
outfmt = mp_imgfmt_from_name(bstr0(p->to), false);
break;
}
}
} else
outfmt = fmt;
if (!outfmt)
return 0;
return vf_next_query_format(vf, outfmt);
}
static int vf_open(vf_instance_t *vf, char *args)
{
if (!vf->priv->cfg_dllname) {
mp_msg(MSGT_VFILTER, MSGL_ERR,
"usage: -vf dlopen=filename.so:function:args\n");
return 0;
}
vf->priv->dll = DLLOpen(vf->priv->cfg_dllname);
if (!vf->priv->dll) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "library not found: %s\n",
vf->priv->cfg_dllname);
return 0;
}
vf_dlopen_getcontext_func *func =
(vf_dlopen_getcontext_func *) DLLSymbol(vf->priv->dll, "vf_dlopen_getcontext");
if (!func) {
mp_msg(MSGT_VFILTER, MSGL_ERR, "library is not a filter: %s\n",
vf->priv->cfg_dllname);
return 0;
}
memset(&vf->priv->filter, 0, sizeof(vf->priv->filter));
vf->priv->filter.major_version = VF_DLOPEN_MAJOR_VERSION;
vf->priv->filter.minor_version = VF_DLOPEN_MINOR_VERSION;
// count arguments
for (vf->priv->cfg_argc = 0;
vf->priv->cfg_argc < sizeof(vf->priv->cfg_argv) / sizeof(vf->priv->cfg_argv[0]) && vf->priv->cfg_argv[vf->priv->cfg_argc];
++vf->priv->cfg_argc)
;
if (func(&vf->priv->filter, vf->priv->cfg_argc, vf->priv->cfg_argv) < 0) {
mp_msg(MSGT_VFILTER, MSGL_ERR,
"function did not create a filter: %s\n",
vf->priv->cfg_dllname);
return 0;
}
if (!vf->priv->filter.put_image) {
mp_msg(MSGT_VFILTER, MSGL_ERR,
"function did not create a filter that can put images: %s\n",
vf->priv->cfg_dllname);
return 0;
}
vf->put_image = put_image;
vf->query_format = query_format;
vf->config = config;
vf->uninit = uninit;
return 1;
}
#define ST_OFF(f) M_ST_OFF(struct vf_priv_s, f)
static m_option_t vf_opts_fields[] = {
{"dll", ST_OFF(cfg_dllname), CONF_TYPE_STRING, 0, 0, 0, NULL},
{"a0", ST_OFF(cfg_argv[0]), CONF_TYPE_STRING, 0, 0, 0, NULL},
{"a1", ST_OFF(cfg_argv[1]), CONF_TYPE_STRING, 0, 0, 0, NULL},
{"a2", ST_OFF(cfg_argv[2]), CONF_TYPE_STRING, 0, 0, 0, NULL},
{"a3", ST_OFF(cfg_argv[3]), CONF_TYPE_STRING, 0, 0, 0, NULL},
{ NULL, NULL, 0, 0, 0, 0, NULL }
};
static const m_struct_t vf_opts = {
"dlopen",
sizeof(struct vf_priv_s),
&vf_priv_dflt,
vf_opts_fields
};
const vf_info_t vf_info_dlopen = {
"Dynamic library filter",
"dlopen",
"Rudolf Polzer",
"",
vf_open,
&vf_opts
};
//===========================================================================//
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