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mpv/video/filter/vf.c

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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <sys/types.h>
#include <libavutil/buffer.h>
#include <libavutil/common.h>
#include <libavutil/mem.h>
#include "config.h"
#include "common/common.h"
#include "common/global.h"
#include "common/msg.h"
#include "options/m_option.h"
#include "options/m_config.h"
#include "options/options.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "video/mp_image_pool.h"
#include "vf.h"
extern const vf_info_t vf_info_crop;
extern const vf_info_t vf_info_expand;
extern const vf_info_t vf_info_scale;
extern const vf_info_t vf_info_format;
extern const vf_info_t vf_info_noformat;
extern const vf_info_t vf_info_flip;
extern const vf_info_t vf_info_rotate;
extern const vf_info_t vf_info_mirror;
extern const vf_info_t vf_info_gradfun;
extern const vf_info_t vf_info_dsize;
extern const vf_info_t vf_info_pullup;
extern const vf_info_t vf_info_sub;
extern const vf_info_t vf_info_yadif;
extern const vf_info_t vf_info_stereo3d;
extern const vf_info_t vf_info_convert;
extern const vf_info_t vf_info_lavfi;
extern const vf_info_t vf_info_lavfi_bridge;
extern const vf_info_t vf_info_vaapi;
extern const vf_info_t vf_info_vapoursynth;
extern const vf_info_t vf_info_vapoursynth_lazy;
extern const vf_info_t vf_info_vdpaupp;
extern const vf_info_t vf_info_buffer;
extern const vf_info_t vf_info_d3d11vpp;
// list of available filters:
static const vf_info_t *const filter_list[] = {
#if HAVE_GPL
&vf_info_crop,
&vf_info_expand,
&vf_info_scale,
&vf_info_format,
&vf_info_noformat,
&vf_info_flip,
&vf_info_mirror,
&vf_info_rotate,
&vf_info_gradfun,
&vf_info_pullup,
&vf_info_yadif,
&vf_info_stereo3d,
&vf_info_dsize,
&vf_info_sub,
#endif
&vf_info_convert,
&vf_info_lavfi,
&vf_info_lavfi_bridge,
&vf_info_buffer,
#if HAVE_VAPOURSYNTH_CORE && HAVE_VAPOURSYNTH
&vf_info_vapoursynth,
#endif
#if HAVE_VAPOURSYNTH_CORE && HAVE_VAPOURSYNTH_LAZY
&vf_info_vapoursynth_lazy,
#endif
#if HAVE_VAAPI
&vf_info_vaapi,
#endif
#if HAVE_VDPAU
&vf_info_vdpaupp,
#endif
#if HAVE_D3D_HWACCEL
&vf_info_d3d11vpp,
#endif
NULL
};
static void vf_uninit_filter(vf_instance_t *vf);
static bool get_desc(struct m_obj_desc *dst, int index)
{
if (index >= MP_ARRAY_SIZE(filter_list) - 1)
return false;
const vf_info_t *vf = filter_list[index];
*dst = (struct m_obj_desc) {
.name = vf->name,
.description = vf->description,
.priv_size = vf->priv_size,
.priv_defaults = vf->priv_defaults,
.options = vf->options,
.p = vf,
.print_help = vf->print_help,
};
return true;
}
// For the vf option
const struct m_obj_list vf_obj_list = {
.get_desc = get_desc,
.description = "video filters",
.allow_disable_entries = true,
.allow_unknown_entries = true,
};
// Try the cmd on each filter (starting with the first), and stop at the first
// filter which does not return CONTROL_UNKNOWN for it.
int vf_control_any(struct vf_chain *c, int cmd, void *arg)
{
for (struct vf_instance *cur = c->first; cur; cur = cur->next) {
if (cur->control) {
int r = cur->control(cur, cmd, arg);
if (r != CONTROL_UNKNOWN)
return r;
}
}
return CONTROL_UNKNOWN;
}
int vf_control_by_label(struct vf_chain *c,int cmd, void *arg, bstr label)
{
char *label_str = bstrdup0(NULL, label);
struct vf_instance *cur = vf_find_by_label(c, label_str);
talloc_free(label_str);
if (cur) {
return cur->control ? cur->control(cur, cmd, arg) : CONTROL_NA;
} else {
return CONTROL_UNKNOWN;
}
}
static void vf_control_all(struct vf_chain *c, int cmd, void *arg)
{
for (struct vf_instance *cur = c->first; cur; cur = cur->next) {
if (cur->control)
cur->control(cur, cmd, arg);
}
}
int vf_send_command(struct vf_chain *c, char *label, char *cmd, char *arg)
{
char *args[2] = {cmd, arg};
if (strcmp(label, "all") == 0) {
vf_control_all(c, VFCTRL_COMMAND, args);
return 0;
} else {
return vf_control_by_label(c, VFCTRL_COMMAND, args, bstr0(label));
}
}
static void vf_fix_img_params(struct mp_image *img, struct mp_image_params *p)
{
// Filters must absolutely set these correctly.
assert(img->w == p->w && img->h == p->h);
assert(img->imgfmt == p->imgfmt);
// Too many things don't set this correctly.
// If --colormatrix is used, decoder and filter chain disagree too.
// In general, it's probably more convenient to force these here,
// instead of requiring filters to set these correctly.
img->params = *p;
}
// Get a new image for filter output, with size and pixel format according to
// the last vf_config call.
struct mp_image *vf_alloc_out_image(struct vf_instance *vf)
{
struct mp_image_params *p = &vf->fmt_out;
assert(p->imgfmt);
struct mp_image *img = mp_image_pool_get(vf->out_pool, p->imgfmt, p->w, p->h);
if (img)
vf_fix_img_params(img, p);
return img;
}
// Returns false on failure; then the image can't be written to.
bool vf_make_out_image_writeable(struct vf_instance *vf, struct mp_image *img)
{
struct mp_image_params *p = &vf->fmt_out;
assert(p->imgfmt);
assert(p->imgfmt == img->imgfmt);
assert(p->w == img->w && p->h == img->h);
return mp_image_pool_make_writeable(vf->out_pool, img);
}
//============================================================================
// The default callback assumes all formats are passed through.
static int vf_default_query_format(struct vf_instance *vf, unsigned int fmt)
{
return vf_next_query_format(vf, fmt);
}
void vf_print_filter_chain(struct vf_chain *c, int msglevel,
struct vf_instance *vf)
{
if (!mp_msg_test(c->log, msglevel))
return;
for (vf_instance_t *f = c->first; f; f = f->next) {
char b[256] = {0};
mp_snprintf_cat(b, sizeof(b), " [%s] ", f->full_name);
if (f->label)
mp_snprintf_cat(b, sizeof(b), "\"%s\" ", f->label);
mp_snprintf_cat(b, sizeof(b), "%s", mp_image_params_to_str(&f->fmt_out));
if (f->autoinserted)
mp_snprintf_cat(b, sizeof(b), " [a]");
if (f == vf)
mp_snprintf_cat(b, sizeof(b), " <---");
mp_msg(c->log, msglevel, "%s\n", b);
}
}
static struct vf_instance *vf_open(struct vf_chain *c, const char *name,
char **args)
{
const char *lavfi_name = NULL;
char **lavfi_args = NULL;
struct m_obj_desc desc;
if (!m_obj_list_find(&desc, &vf_obj_list, bstr0(name))) {
if (!m_obj_list_find(&desc, &vf_obj_list, bstr0("lavfi-bridge"))) {
MP_ERR(c, "Couldn't find video filter '%s'.\n", name);
return NULL;
}
lavfi_name = name;
lavfi_args = args;
args = NULL;
if (strncmp(lavfi_name, "lavfi-", 6) == 0)
lavfi_name += 6;
}
vf_instance_t *vf = talloc_zero(NULL, struct vf_instance);
*vf = (vf_instance_t) {
.full_name = talloc_strdup(vf, name),
.info = desc.p,
.log = mp_log_new(vf, c->log, name),
.hwdec_devs = c->hwdec_devs,
.query_format = vf_default_query_format,
.out_pool = talloc_steal(vf, mp_image_pool_new(16)),
.chain = c,
};
struct m_config *config =
m_config_from_obj_desc_and_args(vf, vf->log, c->global, &desc,
name, c->opts->vf_defs, args);
if (!config)
goto error;
if (lavfi_name) {
// Pass the filter arguments as proper sub-options to the bridge filter.
struct m_config_option *name_opt = m_config_get_co(config, bstr0("name"));
assert(name_opt);
assert(name_opt->opt->type == &m_option_type_string);
if (m_config_set_option_raw(config, name_opt, &lavfi_name, 0) < 0)
goto error;
struct m_config_option *opts = m_config_get_co(config, bstr0("opts"));
assert(opts);
assert(opts->opt->type == &m_option_type_keyvalue_list);
if (m_config_set_option_raw(config, opts, &lavfi_args, 0) < 0)
goto error;
vf->full_name = talloc_asprintf(vf, "%s (lavfi)", vf->full_name);
}
vf->priv = config->optstruct;
int retcode = vf->info->open(vf);
if (retcode < 1)
goto error;
return vf;
error:
MP_ERR(c, "Creating filter '%s' failed.\n", name);
talloc_free(vf);
return NULL;
}
static vf_instance_t *vf_open_filter(struct vf_chain *c, const char *name,
char **args)
{
int i, l = 0;
for (i = 0; args && args[2 * i]; i++)
l += 1 + strlen(args[2 * i]) + 1 + strlen(args[2 * i + 1]);
l += strlen(name);
char *str = malloc(l + 1);
if (!str)
return NULL;
char *p = str;
p += sprintf(str, "%s", name);
for (i = 0; args && args[2 * i]; i++)
p += sprintf(p, " %s=%s", args[2 * i], args[2 * i + 1]);
MP_INFO(c, "Opening video filter: [%s]\n", str);
free(str);
return vf_open(c, name, args);
}
void vf_remove_filter(struct vf_chain *c, struct vf_instance *vf)
{
assert(vf != c->first && vf != c->last); // these are sentinels
struct vf_instance *prev = c->first;
while (prev && prev->next != vf)
prev = prev->next;
assert(prev); // not inserted
prev->next = vf->next;
vf_uninit_filter(vf);
c->initialized = 0;
}
struct vf_instance *vf_append_filter(struct vf_chain *c, const char *name,
char **args)
{
struct vf_instance *vf = vf_open_filter(c, name, args);
if (vf) {
// Insert it before the last filter, which is the "out" pseudo-filter
// (But after the "in" pseudo-filter)
struct vf_instance **pprev = &c->first->next;
while (*pprev && (*pprev)->next)
pprev = &(*pprev)->next;
vf->next = *pprev ? *pprev : NULL;
*pprev = vf;
c->initialized = 0;
}
return vf;
}
int vf_append_filter_list(struct vf_chain *c, struct m_obj_settings *list)
{
for (int n = 0; list && list[n].name; n++) {
if (!list[n].enabled)
continue;
struct vf_instance *vf =
vf_append_filter(c, list[n].name, list[n].attribs);
if (vf) {
if (list[n].label) {
vf->label = talloc_strdup(vf, list[n].label);
} else {
for (int i = 0; i < 100; i++) {
char* label = talloc_asprintf(vf, "%s.%02d", list[n].name, i);
if (vf_find_by_label(c, label)) {
talloc_free(label);
} else {
vf->label = label;
break;
}
}
}
}
}
return 0;
}
// Used by filters to add a filtered frame to the output queue.
// Ownership of img is transferred from caller to the filter chain.
void vf_add_output_frame(struct vf_instance *vf, struct mp_image *img)
{
if (img) {
vf_fix_img_params(img, &vf->fmt_out);
MP_TARRAY_APPEND(vf, vf->out_queued, vf->num_out_queued, img);
}
}
static bool vf_has_output_frame(struct vf_instance *vf)
{
if (!vf->num_out_queued && vf->filter_out) {
if (vf->filter_out(vf) < 0)
MP_ERR(vf, "Error filtering frame.\n");
}
return vf->num_out_queued > 0;
}
static struct mp_image *vf_dequeue_output_frame(struct vf_instance *vf)
{
struct mp_image *res = NULL;
if (vf_has_output_frame(vf)) {
res = vf->out_queued[0];
MP_TARRAY_REMOVE_AT(vf->out_queued, vf->num_out_queued, 0);
}
return res;
}
static int vf_do_filter(struct vf_instance *vf, struct mp_image *img)
{
assert(vf->fmt_in.imgfmt);
if (img)
assert(mp_image_params_equal(&img->params, &vf->fmt_in));
if (vf->filter_ext) {
int r = vf->filter_ext(vf, img);
if (r < 0)
MP_ERR(vf, "Error filtering frame.\n");
return r;
} else {
if (img) {
if (vf->filter)
img = vf->filter(vf, img);
vf_add_output_frame(vf, img);
}
return 0;
}
}
// Input a frame into the filter chain. Ownership of img is transferred.
// Return >= 0 on success, < 0 on failure (even if output frames were produced)
int vf_filter_frame(struct vf_chain *c, struct mp_image *img)
{
assert(img);
if (c->initialized < 1) {
talloc_free(img);
return -1;
}
assert(mp_image_params_equal(&img->params, &c->input_params));
return vf_do_filter(c->first, img);
}
// Similar to vf_output_frame(), but only ensure that the filter "until" has
// output, instead of the end of the filter chain.
static int vf_output_frame_until(struct vf_chain *c, struct vf_instance *until,
bool eof)
{
if (until->num_out_queued)
return 1;
if (c->initialized < 1)
return -1;
while (1) {
struct vf_instance *last = NULL;
for (struct vf_instance * cur = c->first; cur; cur = cur->next) {
// Flush remaining frames on EOF, but do that only if the previous
// filters have been flushed (i.e. they have no more output).
if (eof && !last) {
int r = vf_do_filter(cur, NULL);
if (r < 0)
return r;
}
if (vf_has_output_frame(cur))
last = cur;
if (cur == until)
break;
}
if (!last)
return 0;
if (last == until)
return 1;
int r = vf_do_filter(last->next, vf_dequeue_output_frame(last));
if (r < 0)
return r;
}
}
// Output the next queued image (if any) from the full filter chain.
// The frame can be retrieved with vf_read_output_frame().
// eof: if set, assume there's no more input i.e. vf_filter_frame() will
// not be called (until reset) - flush all internally delayed frames
// returns: -1: error, 0: no output, 1: output available
int vf_output_frame(struct vf_chain *c, bool eof)
{
return vf_output_frame_until(c, c->last, eof);
}
struct mp_image *vf_read_output_frame(struct vf_chain *c)
{
if (!c->last->num_out_queued)
vf_output_frame(c, false);
return vf_dequeue_output_frame(c->last);
}
// Undo the previous vf_read_output_frame().
void vf_unread_output_frame(struct vf_chain *c, struct mp_image *img)
{
struct vf_instance *vf = c->last;
MP_TARRAY_INSERT_AT(vf, vf->out_queued, vf->num_out_queued, 0, img);
}
// Some filters (vf_vapoursynth) filter on separate threads, and may need new
// input from the decoder, even though the core does not need a new output image
// yet (this is required to get proper pipelining in the filter). If the filter
// needs new data, it will call c->wakeup_callback, which in turn causes the
// core to recheck the filter chain, calling this function. Each filter is asked
// whether it needs a frame (with vf->needs_input), and if so, it will try to
// feed it a new frame. If this fails, it will request a new frame from the
// core by returning 1.
// returns -1: error, 0: nothing needed, 1: add new frame with vf_filter_frame()
int vf_needs_input(struct vf_chain *c)
{
struct vf_instance *prev = c->first;
for (struct vf_instance *cur = c->first; cur; cur = cur->next) {
while (cur->needs_input && cur->needs_input(cur)) {
// Get frames from preceding filters, or if there are none,
// request new frames from decoder.
int r = vf_output_frame_until(c, prev, false);
if (r < 1)
return r < 0 ? -1 : 1;
r = vf_do_filter(cur, vf_dequeue_output_frame(prev));
if (r < 0)
return r;
}
prev = cur;
}
return 0;
}
static void vf_forget_frames(struct vf_instance *vf)
{
for (int n = 0; n < vf->num_out_queued; n++)
talloc_free(vf->out_queued[n]);
vf->num_out_queued = 0;
}
static void vf_chain_forget_frames(struct vf_chain *c)
{
for (struct vf_instance *cur = c->first; cur; cur = cur->next)
vf_forget_frames(cur);
}
void vf_seek_reset(struct vf_chain *c)
{
vf_control_all(c, VFCTRL_SEEK_RESET, NULL);
vf_chain_forget_frames(c);
}
int vf_next_query_format(struct vf_instance *vf, unsigned int fmt)
{
return fmt >= IMGFMT_START && fmt < IMGFMT_END
? vf->last_outfmts[fmt - IMGFMT_START] : 0;
}
// Mark accepted input formats in fmts[]. Note that ->query_format will
// typically (but not always) call vf_next_query_format() to check whether
// an output format is supported.
static void query_formats(uint8_t *fmts, struct vf_instance *vf)
{
for (int n = IMGFMT_START; n < IMGFMT_END; n++)
fmts[n - IMGFMT_START] = vf->query_format(vf, n);
}
static bool is_conv_filter(struct vf_instance *vf)
{
return vf && (strcmp(vf->info->name, "convert") == 0 || vf->autoinserted);
}
static const char *find_conv_filter(uint8_t *fmts_in, uint8_t *fmts_out)
{
for (int n = 0; filter_list[n]; n++) {
if (filter_list[n]->test_conversion) {
for (int a = IMGFMT_START; a < IMGFMT_END; a++) {
for (int b = IMGFMT_START; b < IMGFMT_END; b++) {
if (fmts_in[a - IMGFMT_START] && fmts_out[b - IMGFMT_START] &&
filter_list[n]->test_conversion(a, b))
return filter_list[n]->name;
}
}
}
}
return "convert";
}
static void update_formats(struct vf_chain *c, struct vf_instance *vf,
uint8_t *fmts)
{
if (vf->next)
update_formats(c, vf->next, vf->last_outfmts);
query_formats(fmts, vf);
bool has_in = false, has_out = false;
for (int n = IMGFMT_START; n < IMGFMT_END; n++) {
has_in |= !!fmts[n - IMGFMT_START];
has_out |= !!vf->last_outfmts[n - IMGFMT_START];
}
if (has_out && !has_in && !is_conv_filter(vf) &&
!is_conv_filter(vf->next))
{
// If there are output formats, but no input formats (meaning the
// filters after vf work, but vf can't output any format the filters
// after it accept), try to insert a conversion filter.
MP_INFO(c, "Using conversion filter.\n");
// Determine which output formats the filter _could_ accept. For this
// to work after the conversion filter is inserted, it is assumed that
// conversion filters have a single set of in/output formats that can
// be converted to each other.
uint8_t out_formats[IMGFMT_END - IMGFMT_START];
for (int n = IMGFMT_START; n < IMGFMT_END; n++) {
out_formats[n - IMGFMT_START] = vf->last_outfmts[n - IMGFMT_START];
vf->last_outfmts[n - IMGFMT_START] = 1;
}
query_formats(fmts, vf);
const char *filter = find_conv_filter(fmts, out_formats);
char **args = NULL;
char *args_no_warn[] = {"warn", "no", NULL};
if (strcmp(filter, "scale") == 0)
args = args_no_warn;
struct vf_instance *conv = vf_open(c, filter, args);
if (conv) {
conv->autoinserted = true;
conv->next = vf->next;
vf->next = conv;
update_formats(c, conv, vf->last_outfmts);
query_formats(fmts, vf);
}
}
for (int n = IMGFMT_START; n < IMGFMT_END; n++)
has_in |= !!fmts[n - IMGFMT_START];
if (!has_in) {
// Pretend all out formats work. All this does it getting better
// error messages in some cases, so we can configure all filter
// until it fails, which will be visible in vf_print_filter_chain().
for (int n = IMGFMT_START; n < IMGFMT_END; n++)
vf->last_outfmts[n - IMGFMT_START] = 1;
query_formats(fmts, vf);
}
}
// Insert a conversion filter _after_ vf.
// vf needs to have been successfully configured, vf->next unconfigured but
// with formats negotiated.
static void auto_insert_conversion_filter_if_needed(struct vf_chain *c,
struct vf_instance *vf)
{
if (!vf->next || vf->next->query_format(vf->next, vf->fmt_out.imgfmt) ||
is_conv_filter(vf) || is_conv_filter(vf->next))
return;
MP_INFO(c, "Using conversion filter.\n");
uint8_t fmts[IMGFMT_END - IMGFMT_START];
query_formats(fmts, vf->next);
uint8_t out_formats[IMGFMT_END - IMGFMT_START];
for (int n = IMGFMT_START; n < IMGFMT_END; n++)
out_formats[n - IMGFMT_START] = n == vf->fmt_out.imgfmt;
const char *filter = find_conv_filter(out_formats, fmts);
char **args = NULL;
char *args_no_warn[] = {"warn", "no", NULL};
if (strcmp(filter, "scale") == 0)
args = args_no_warn;
struct vf_instance *conv = vf_open(c, filter, args);
if (conv) {
conv->autoinserted = true;
conv->next = vf->next;
vf->next = conv;
update_formats(c, conv, vf->last_outfmts);
}
}
static int vf_reconfig_wrapper(struct vf_instance *vf,
const struct mp_image_params *p)
{
vf_forget_frames(vf);
if (vf->out_pool)
mp_image_pool_clear(vf->out_pool);
if (!vf->query_format(vf, p->imgfmt))
return -2;
vf->fmt_out = vf->fmt_in = *p;
if (!mp_image_params_valid(&vf->fmt_in))
return -2;
int r = 0;
if (vf->reconfig)
r = vf->reconfig(vf, &vf->fmt_in, &vf->fmt_out);
if (!mp_image_params_equal(&vf->fmt_in, p))
r = -2;
if (!mp_image_params_valid(&vf->fmt_out))
r = -2;
// Fix csp in case of pixel format change
if (r >= 0)
mp_image_params_guess_csp(&vf->fmt_out);
return r;
}
int vf_reconfig(struct vf_chain *c, const struct mp_image_params *params)
{
int r = 0;
vf_seek_reset(c);
for (struct vf_instance *vf = c->first; vf; ) {
struct vf_instance *next = vf->next;
if (vf->autoinserted)
vf_remove_filter(c, vf);
vf = next;
}
c->input_params = *params;
c->first->fmt_in = *params;
struct mp_image_params cur = *params;
uint8_t unused[IMGFMT_END - IMGFMT_START];
update_formats(c, c->first, unused);
AVBufferRef *hwfctx = c->in_hwframes_ref;
struct vf_instance *failing = NULL;
for (struct vf_instance *vf = c->first; vf; vf = vf->next) {
av_buffer_unref(&vf->in_hwframes_ref);
av_buffer_unref(&vf->out_hwframes_ref);
vf->in_hwframes_ref = hwfctx ? av_buffer_ref(hwfctx) : NULL;
vf->out_hwframes_ref = hwfctx ? av_buffer_ref(hwfctx) : NULL;
r = vf_reconfig_wrapper(vf, &cur);
if (r < 0) {
failing = vf;
break;
}
cur = vf->fmt_out;
hwfctx = vf->out_hwframes_ref;
// Recheck if the new output format works with the following filters.
auto_insert_conversion_filter_if_needed(c, vf);
}
c->output_params = cur;
c->initialized = r < 0 ? -1 : 1;
int loglevel = r < 0 ? MSGL_WARN : MSGL_V;
if (r == -2)
MP_ERR(c, "Image formats incompatible or invalid.\n");
mp_msg(c->log, loglevel, "Video filter chain:\n");
vf_print_filter_chain(c, loglevel, failing);
if (r < 0)
c->output_params = (struct mp_image_params){0};
return r;
}
// Hack to get mp_image.hwctx before vf_reconfig()
void vf_set_proto_frame(struct vf_chain *c, struct mp_image *img)
{
av_buffer_unref(&c->in_hwframes_ref);
c->in_hwframes_ref = img && img->hwctx ? av_buffer_ref(img->hwctx) : NULL;
}
struct vf_instance *vf_find_by_label(struct vf_chain *c, const char *label)
{
struct vf_instance *vf = c->first;
while (vf) {
if (vf->label && label && strcmp(vf->label, label) == 0)
return vf;
vf = vf->next;
}
return NULL;
}
static void vf_uninit_filter(vf_instance_t *vf)
{
av_buffer_unref(&vf->in_hwframes_ref);
av_buffer_unref(&vf->out_hwframes_ref);
if (vf->uninit)
vf->uninit(vf);
vf_forget_frames(vf);
talloc_free(vf);
}
static int input_query_format(struct vf_instance *vf, unsigned int fmt)
{
// Setting fmt_in is guaranteed by vf_reconfig().
if (fmt == vf->fmt_in.imgfmt)
return vf_next_query_format(vf, fmt);
return 0;
}
static int output_query_format(struct vf_instance *vf, unsigned int fmt)
{
struct vf_chain *c = (void *)vf->priv;
if (fmt >= IMGFMT_START && fmt < IMGFMT_END)
return c->allowed_output_formats[fmt - IMGFMT_START];
return 0;
}
struct vf_chain *vf_new(struct mpv_global *global)
{
struct vf_chain *c = talloc_ptrtype(NULL, c);
*c = (struct vf_chain){
.opts = global->opts,
.log = mp_log_new(c, global->log, "!vf"),
.global = global,
};
static const struct vf_info in = { .name = "in" };
c->first = talloc(c, struct vf_instance);
*c->first = (struct vf_instance) {
.full_name = "in",
.log = c->log,
.info = &in,
.query_format = input_query_format,
};
static const struct vf_info out = { .name = "out" };
c->last = talloc(c, struct vf_instance);
*c->last = (struct vf_instance) {
.full_name = "out",
.log = c->log,
.info = &out,
.query_format = output_query_format,
.priv = (void *)c,
};
c->first->next = c->last;
return c;
}
void vf_destroy(struct vf_chain *c)
{
if (!c)
return;
av_buffer_unref(&c->in_hwframes_ref);
while (c->first) {
vf_instance_t *vf = c->first;
c->first = vf->next;
vf_uninit_filter(vf);
}
vf_chain_forget_frames(c);
talloc_free(c);
}
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