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1263b0a6ca
AVMediaCodecDeviceContext without surface or native_window is useless, it shouldn't be created at all. Such dummy AVHWDeviceContext is allowed before, and it's used by mpv player. Creating a ANativeWindow automatically breaks such usecases. So disable creating a ANativeWindow by default. It can be enabled via the create_window flag, or by set the AVDictionary of av_hwdevice_ctx_create(). The downside is that ffmpeg -hwaccel mediacodec -i input.mp4 \ -c:a copy -c:v hevc_mediacodec output.mp4 use ByteBuffer mode which isn't as efficient as before. The upside is libavfilter works now, which should be less surprise. To enable create_window on ffmpeg command line, use ffmpeg -hwaccel mediacodec \ -init_hw_device mediacodec=mediacodec,create_window=1 \ -i input.mp4 -c:a copy -c:v hevc_mediacodec output.mp4 Users should know what it is to enable create_window. It should be OK to take sometime to figure out the option. And there are comments inside hwcontext_mediacodec.h to help user figure it out. Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/*
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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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};
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