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mpv/video/hwdec.c
wm4 76276c9210 video: rewrite filtering glue code
Get rid of the old vf.c code. Replace it with a generic filtering
framework, which can potentially handle more than just --vf. At least
reimplementing --af with this code is planned.

This changes some --vf semantics (including runtime behavior and the
"vf" command). The most important ones are listed in interface-changes.

vf_convert.c is renamed to f_swscale.c. It is now an internal filter
that can not be inserted by the user manually.

f_lavfi.c is a refactor of player/lavfi.c. The latter will be removed
once --lavfi-complex is reimplemented on top of f_lavfi.c. (which is
conceptually easy, but a big mess due to the data flow changes).

The existing filters are all changed heavily. The data flow of the new
filter framework is different. Especially EOF handling changes - EOF is
now a "frame" rather than a state, and must be passed through exactly
once.

Another major thing is that all filters must support dynamic format
changes. The filter reconfig() function goes away. (This sounds complex,
but since all filters need to handle EOF draining anyway, they can use
the same code, and it removes the mess with reconfig() having to predict
the output format, which completely breaks with libavfilter anyway.)

In addition, there is no automatic format negotiation or conversion.
libavfilter's primitive and insufficient API simply doesn't allow us to
do this in a reasonable way. Instead, filters can use f_autoconvert as
sub-filter, and tell it which formats they support. This filter will in
turn add actual conversion filters, such as f_swscale, to perform
necessary format changes.

vf_vapoursynth.c uses the same basic principle of operation as before,
but with worryingly different details in data flow. Still appears to
work.

The hardware deint filters (vf_vavpp.c, vf_d3d11vpp.c, vf_vdpaupp.c) are
heavily changed. Fortunately, they all used refqueue.c, which is for
sharing the data flow logic (especially for managing future/past
surfaces and such). It turns out it can be used to factor out most of
the data flow. Some of these filters accepted software input. Instead of
having ad-hoc upload code in each filter, surface upload is now
delegated to f_autoconvert, which can use f_hwupload to perform this.

Exporting VO capabilities is still a big mess (mp_stream_info stuff).

The D3D11 code drops the redundant image formats, and all code uses the
hw_subfmt (sw_format in FFmpeg) instead. Although that too seems to be a
big mess for now.

f_async_queue is unused.
2018-01-30 03:10:27 -08:00

145 lines
3.7 KiB
C

#include <pthread.h>
#include <assert.h>
#include <libavutil/hwcontext.h>
#include "config.h"
#include "hwdec.h"
struct mp_hwdec_devices {
pthread_mutex_t lock;
struct mp_hwdec_ctx **hwctxs;
int num_hwctxs;
void (*load_api)(void *ctx);
void *load_api_ctx;
};
struct mp_hwdec_devices *hwdec_devices_create(void)
{
struct mp_hwdec_devices *devs = talloc_zero(NULL, struct mp_hwdec_devices);
pthread_mutex_init(&devs->lock, NULL);
return devs;
}
void hwdec_devices_destroy(struct mp_hwdec_devices *devs)
{
if (!devs)
return;
assert(!devs->num_hwctxs); // must have been hwdec_devices_remove()ed
assert(!devs->load_api); // must have been unset
pthread_mutex_destroy(&devs->lock);
talloc_free(devs);
}
struct mp_hwdec_ctx *hwdec_devices_get_by_lavc(struct mp_hwdec_devices *devs,
int av_hwdevice_type)
{
struct mp_hwdec_ctx *res = NULL;
pthread_mutex_lock(&devs->lock);
for (int n = 0; n < devs->num_hwctxs; n++) {
struct mp_hwdec_ctx *dev = devs->hwctxs[n];
if (dev->av_device_ref) {
AVHWDeviceContext *hwctx = (void *)dev->av_device_ref->data;
if (hwctx->type == av_hwdevice_type) {
res = dev;
break;
}
}
}
pthread_mutex_unlock(&devs->lock);
return res;
}
struct AVBufferRef *hwdec_devices_get_lavc(struct mp_hwdec_devices *devs,
int av_hwdevice_type)
{
struct mp_hwdec_ctx *ctx = hwdec_devices_get_by_lavc(devs, av_hwdevice_type);
if (!ctx)
return NULL;
return av_buffer_ref(ctx->av_device_ref);
}
struct mp_hwdec_ctx *hwdec_devices_get_first(struct mp_hwdec_devices *devs)
{
return hwdec_devices_get_n(devs, 0);
}
struct mp_hwdec_ctx *hwdec_devices_get_n(struct mp_hwdec_devices *devs, int n)
{
pthread_mutex_lock(&devs->lock);
struct mp_hwdec_ctx *res = n < devs->num_hwctxs ? devs->hwctxs[n] : NULL;
pthread_mutex_unlock(&devs->lock);
return res;
}
void hwdec_devices_add(struct mp_hwdec_devices *devs, struct mp_hwdec_ctx *ctx)
{
pthread_mutex_lock(&devs->lock);
MP_TARRAY_APPEND(devs, devs->hwctxs, devs->num_hwctxs, ctx);
pthread_mutex_unlock(&devs->lock);
}
void hwdec_devices_remove(struct mp_hwdec_devices *devs, struct mp_hwdec_ctx *ctx)
{
pthread_mutex_lock(&devs->lock);
for (int n = 0; n < devs->num_hwctxs; n++) {
if (devs->hwctxs[n] == ctx) {
MP_TARRAY_REMOVE_AT(devs->hwctxs, devs->num_hwctxs, n);
break;
}
}
pthread_mutex_unlock(&devs->lock);
}
void hwdec_devices_set_loader(struct mp_hwdec_devices *devs,
void (*load_api)(void *ctx), void *load_api_ctx)
{
devs->load_api = load_api;
devs->load_api_ctx = load_api_ctx;
}
void hwdec_devices_request_all(struct mp_hwdec_devices *devs)
{
if (devs->load_api && !hwdec_devices_get_first(devs))
devs->load_api(devs->load_api_ctx);
}
char *hwdec_devices_get_names(struct mp_hwdec_devices *devs)
{
char *res = NULL;
for (int n = 0; n < devs->num_hwctxs; n++) {
if (res)
ta_xstrdup_append(&res, ",");
ta_xstrdup_append(&res, devs->hwctxs[n]->driver_name);
}
return res;
}
static const struct hwcontext_fns *const hwcontext_fns[] = {
#if HAVE_D3D_HWACCEL
&hwcontext_fns_d3d11,
#endif
#if HAVE_D3D9_HWACCEL
&hwcontext_fns_dxva2,
#endif
#if HAVE_VAAPI
&hwcontext_fns_vaapi,
#endif
#if HAVE_VDPAU
&hwcontext_fns_vdpau,
#endif
NULL,
};
const struct hwcontext_fns *hwdec_get_hwcontext_fns(int av_hwdevice_type)
{
for (int n = 0; hwcontext_fns[n]; n++) {
if (hwcontext_fns[n]->av_hwdevice_type == av_hwdevice_type)
return hwcontext_fns[n];
}
return NULL;
}