FFmpeg
libavutil
hwcontext_mediacodec.c
Go to the documentation of this file.
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include <android/native_window.h>
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#include <dlfcn.h>
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#include <media/NdkMediaCodec.h>
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#include "
buffer.h
"
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#include "
common.h
"
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#include "
hwcontext.h
"
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#include "
hwcontext_internal.h
"
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#include "
hwcontext_mediacodec.h
"
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typedef
struct
MediaCodecDeviceContext
{
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AVMediaCodecDeviceContext
ctx
;
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void
*
libmedia
;
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media_status_t (*
create_surface
)(ANativeWindow **surface);
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}
MediaCodecDeviceContext
;
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static
int
mc_device_create
(
AVHWDeviceContext
*
ctx
,
const
char
*device,
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AVDictionary
*
opts
,
int
flags
)
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{
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const
AVDictionaryEntry
*
entry
=
NULL
;
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MediaCodecDeviceContext
*
s
=
ctx
->hwctx;
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AVMediaCodecDeviceContext
*dev = &
s
->ctx;
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if
(device && device[0]) {
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av_log
(
ctx
,
AV_LOG_ERROR
,
"Device selection unsupported.\n"
);
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return
AVERROR_UNKNOWN
;
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}
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while
((
entry
=
av_dict_iterate
(
opts
,
entry
))) {
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if
(!strcmp(
entry
->key,
"create_window"
))
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dev->
create_window
= atoi(
entry
->value);
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}
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av_log
(
ctx
,
AV_LOG_DEBUG
,
"%s createPersistentInputSurface\n"
,
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dev->
create_window
?
"Enable"
:
"Disable"
);
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return
0;
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}
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static
int
mc_device_init
(
AVHWDeviceContext
*
ctx
)
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{
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MediaCodecDeviceContext
*
s
=
ctx
->hwctx;
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AVMediaCodecDeviceContext
*dev = (
AVMediaCodecDeviceContext
*)
s
;
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ANativeWindow *native_window =
NULL
;
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if
(dev->
surface
)
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return
0;
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if
(dev->
native_window
)
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return
0;
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// For backward compatibility, don't return error for a dummy
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// AVHWDeviceContext without surface or native_window.
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if
(!dev->
create_window
)
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return
0;
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s
->libmedia = dlopen(
"libmediandk.so"
, RTLD_NOW);
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if
(!
s
->libmedia)
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return
AVERROR_UNKNOWN
;
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s
->create_surface = dlsym(
s
->libmedia,
"AMediaCodec_createPersistentInputSurface"
);
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if
(!
s
->create_surface)
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return
AVERROR_UNKNOWN
;
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s
->create_surface(&native_window);
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dev->
native_window
= native_window;
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return
0;
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}
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static
void
mc_device_uninit
(
AVHWDeviceContext
*
ctx
)
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{
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MediaCodecDeviceContext
*
s
=
ctx
->hwctx;
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AVMediaCodecDeviceContext
*dev =
ctx
->hwctx;
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if
(!
s
->libmedia)
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return
;
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if
(dev->
native_window
) {
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ANativeWindow_release(dev->
native_window
);
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dev->
native_window
=
NULL
;
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}
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dlclose(
s
->libmedia);
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s
->libmedia =
NULL
;
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}
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const
HWContextType
ff_hwcontext_type_mediacodec
= {
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.
type
=
AV_HWDEVICE_TYPE_MEDIACODEC
,
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.name =
"mediacodec"
,
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.device_hwctx_size =
sizeof
(
MediaCodecDeviceContext
),
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.device_create =
mc_device_create
,
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.
device_init
=
mc_device_init
,
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.device_uninit =
mc_device_uninit
,
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.
pix_fmts
= (
const
enum
AVPixelFormat
[]){
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AV_PIX_FMT_MEDIACODEC
,
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AV_PIX_FMT_NONE
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},
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};
AVPixelFormat
AVPixelFormat
Pixel format.
Definition:
pixfmt.h:71
entry
#define entry
Definition:
aom_film_grain_template.c:66
mc_device_create
static int mc_device_create(AVHWDeviceContext *ctx, const char *device, AVDictionary *opts, int flags)
Definition:
hwcontext_mediacodec.c:39
AVMediaCodecDeviceContext::surface
void * surface
android/view/Surface handle, to be filled by the user.
Definition:
hwcontext_mediacodec.h:33
MediaCodecDeviceContext::create_surface
media_status_t(* create_surface)(ANativeWindow **surface)
Definition:
hwcontext_mediacodec.c:35
AV_HWDEVICE_TYPE_MEDIACODEC
@ AV_HWDEVICE_TYPE_MEDIACODEC
Definition:
hwcontext.h:38
AVMediaCodecDeviceContext::create_window
int create_window
Enable createPersistentInputSurface automatically.
Definition:
hwcontext_mediacodec.h:58
AVDictionary
Definition:
dict.c:34
AVERROR_UNKNOWN
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition:
error.h:73
hwcontext_mediacodec.h
AVHWDeviceContext
This struct aggregates all the (hardware/vendor-specific) "high-level" state, i.e.
Definition:
hwcontext.h:60
HWContextType::type
enum AVHWDeviceType type
Definition:
hwcontext_internal.h:30
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition:
log.h:209
device_init
static int device_init(AVFormatContext *ctx, int *width, int *height, uint32_t pixelformat)
Definition:
v4l2.c:214
s
#define s(width, name)
Definition:
cbs_vp9.c:198
MediaCodecDeviceContext::libmedia
void * libmedia
Definition:
hwcontext_mediacodec.c:34
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition:
libkvazaar.c:304
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition:
log.h:230
ctx
AVFormatContext * ctx
Definition:
movenc.c:49
AV_PIX_FMT_MEDIACODEC
@ AV_PIX_FMT_MEDIACODEC
hardware decoding through MediaCodec
Definition:
pixfmt.h:316
opts
AVDictionary * opts
Definition:
movenc.c:51
NULL
#define NULL
Definition:
coverity.c:32
ff_hwcontext_type_mediacodec
const HWContextType ff_hwcontext_type_mediacodec
Definition:
hwcontext_mediacodec.c:107
AVMediaCodecDeviceContext
MediaCodec details.
Definition:
hwcontext_mediacodec.h:27
MediaCodecDeviceContext
Definition:
hwcontext_mediacodec.c:31
mc_device_uninit
static void mc_device_uninit(AVHWDeviceContext *ctx)
Definition:
hwcontext_mediacodec.c:92
buffer.h
common.h
AVMediaCodecDeviceContext::native_window
void * native_window
Pointer to ANativeWindow.
Definition:
hwcontext_mediacodec.h:45
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition:
pixfmt.h:72
hwcontext_internal.h
AVDictionaryEntry
Definition:
dict.h:89
MediaCodecDeviceContext::ctx
AVMediaCodecDeviceContext ctx
Definition:
hwcontext_mediacodec.c:32
flags
#define flags(name, subs,...)
Definition:
cbs_av1.c:482
hwcontext.h
av_log
#define av_log(a,...)
Definition:
tableprint_vlc.h:27
HWContextType
Definition:
hwcontext_internal.h:29
av_dict_iterate
const AVDictionaryEntry * av_dict_iterate(const AVDictionary *m, const AVDictionaryEntry *prev)
Iterate over a dictionary.
Definition:
dict.c:44
mc_device_init
static int mc_device_init(AVHWDeviceContext *ctx)
Definition:
hwcontext_mediacodec.c:62
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