lavu/hwcontext: add AV_HWDEVICE_TYPE_MEDIACODEC

Signed-off-by: Matthieu Bouron <matthieu.bouron@gmail.com>

doc/APIchanges

@@ -15,6 +15,10 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2017-xx-xx - xxxxxxx - lavu 56.6.100 - hwcontext.h hwcontext_mediacodec.h
+  Add AV_HWDEVICE_TYPE_MEDIACODEC and a new installed header with
+  MediaCodec-specific hwcontext definitions.
+
 2017-xx-xx - xxxxxxc - lavc 58.7.100 - avcodec.h
   Add AV_CODEC_CAP_HARDWARE, AV_CODEC_CAP_HYBRID, and AVCodec.wrapper_name,
   and mark all AVCodecs accordingly.

libavutil/Makefile

@@ -37,6 +37,7 @@ HEADERS = adler32.h                                                     \
           hwcontext_drm.h                                               \
           hwcontext_dxva2.h                                             \
           hwcontext_qsv.h                                               \
+          hwcontext_mediacodec.h                                        \
           hwcontext_vaapi.h                                             \
           hwcontext_videotoolbox.h                                      \
           hwcontext_vdpau.h                                             \
@@ -166,6 +167,7 @@ OBJS-$(CONFIG_OPENCL)                   += hwcontext_opencl.o
 OBJS-$(CONFIG_VAAPI)                    += hwcontext_vaapi.o
 OBJS-$(CONFIG_VIDEOTOOLBOX)             += hwcontext_videotoolbox.o
 OBJS-$(CONFIG_VDPAU)                    += hwcontext_vdpau.o
+OBJS-$(CONFIG_MEDIACODEC)               += hwcontext_mediacodec.o
 
 OBJS += $(COMPAT_OBJS:%=../compat/%)
 

libavutil/hwcontext.c

@@ -55,6 +55,9 @@ static const HWContextType * const hw_table[] = {
 #endif
 #if CONFIG_VIDEOTOOLBOX
     &ff_hwcontext_type_videotoolbox,
+#endif
+#if CONFIG_MEDIACODEC
+    &ff_hwcontext_type_mediacodec,
 #endif
     NULL,
 };
@@ -69,6 +72,7 @@ static const char *const hw_type_names[] = {
     [AV_HWDEVICE_TYPE_VAAPI]  = "vaapi",
     [AV_HWDEVICE_TYPE_VDPAU]  = "vdpau",
     [AV_HWDEVICE_TYPE_VIDEOTOOLBOX] = "videotoolbox",
+    [AV_HWDEVICE_TYPE_MEDIACODEC] = "mediacodec",
 };
 
 enum AVHWDeviceType av_hwdevice_find_type_by_name(const char *name)

libavutil/hwcontext.h

@@ -35,6 +35,7 @@ enum AVHWDeviceType {
     AV_HWDEVICE_TYPE_D3D11VA,
     AV_HWDEVICE_TYPE_DRM,
     AV_HWDEVICE_TYPE_OPENCL,
+    AV_HWDEVICE_TYPE_MEDIACODEC,
 };
 
 typedef struct AVHWDeviceInternal AVHWDeviceInternal;

libavutil/hwcontext_internal.h

@@ -166,5 +166,6 @@ extern const HWContextType ff_hwcontext_type_qsv;
 extern const HWContextType ff_hwcontext_type_vaapi;
 extern const HWContextType ff_hwcontext_type_vdpau;
 extern const HWContextType ff_hwcontext_type_videotoolbox;
+extern const HWContextType ff_hwcontext_type_mediacodec;
 
 #endif /* AVUTIL_HWCONTEXT_INTERNAL_H */

libavutil/hwcontext_mediacodec.c

+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+
+#include "buffer.h"
+#include "common.h"
+#include "hwcontext.h"
+#include "hwcontext_internal.h"
+#include "hwcontext_mediacodec.h"
+
+static int mc_device_create(AVHWDeviceContext *ctx, const char *device,
+                            AVDictionary *opts, int flags)
+{
+    if (device && device[0]) {
+        av_log(ctx, AV_LOG_ERROR, "Device selection unsupported.\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    return 0;
+}
+
+const HWContextType ff_hwcontext_type_mediacodec = {
+    .type                 = AV_HWDEVICE_TYPE_MEDIACODEC,
+    .name                 = "mediacodec",
+
+    .device_hwctx_size    = sizeof(AVMediaCodecDeviceContext),
+
+    .device_create        = mc_device_create,
+
+    .pix_fmts = (const enum AVPixelFormat[]){
+        AV_PIX_FMT_MEDIACODEC,
+        AV_PIX_FMT_NONE
+    },
+};

libavutil/hwcontext_mediacodec.h

+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_HWCONTEXT_MEDIACODEC_H
+#define AVUTIL_HWCONTEXT_MEDIACODEC_H
+
+/**
+ * MediaCodec details.
+ *
+ * Allocated as AVHWDeviceContext.hwctx
+ */
+typedef struct AVMediaCodecDeviceContext {
+    /**
+     * android/view/Surface handle, to be filled by the user.
+     *
+     * This is the default surface used by decoders on this device.
+     */
+    void *surface;
+} AVMediaCodecDeviceContext;
+
+#endif /* AVUTIL_HWCONTEXT_MEDIACODEC_H */

libavutil/version.h

@@ -79,7 +79,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  56
-#define LIBAVUTIL_VERSION_MINOR   5
+#define LIBAVUTIL_VERSION_MINOR   6
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \