Add support for H.264 and HEVC hardware encoding for AMD GPUs based on AMF SDK

Requires AMF headers for at least version 1.4.4.1.

Signed-off-by: Mikhail Mironov <mikhail.mironov@amd.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

1 files changed, 158 insertions, 0 deletions

diff --git a/libavcodec/amfenc.h b/libavcodec/amfenc.h
new file mode 100644
index 0000000000..f3b82be770
--- /dev/null
+++ b/libavcodec/amfenc.h
@@ -0,0 +1,158 @@
+/*
+ * AMD AMF support
+ * Copyright (C) 2017 Luca Barbato
+ * Copyright (C) 2017 Mikhail Mironov <mikhail.mironov@amd.com>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#ifndef AVCODEC_AMFENC_H
+#define AVCODEC_AMFENC_H
+
+#include <AMF/core/Factory.h>
+
+#include <AMF/components/VideoEncoderVCE.h>
+#include <AMF/components/VideoEncoderHEVC.h>
+
+#include "libavutil/fifo.h"
+
+#include "config.h"
+#include "avcodec.h"
+
+
+/**
+* AMF trace writer callback class
+* Used to capture all AMF logging
+*/
+
+typedef struct AmfTraceWriter {
+    AMFTraceWriterVtbl *vtbl;
+    AVCodecContext     *avctx;
+} AmfTraceWriter;
+
+/**
+* AMF encoder context
+*/
+
+typedef struct AmfContext {
+    AVClass            *avclass;
+    // access to AMF runtime
+    amf_handle          library; ///< handle to DLL library
+    AMFFactory         *factory; ///< pointer to AMF factory
+    AMFDebug           *debug;   ///< pointer to AMF debug interface
+    AMFTrace           *trace;   ///< pointer to AMF trace interface
+
+    amf_uint64          version; ///< version of AMF runtime
+    AmfTraceWriter      tracer;  ///< AMF writer registered with AMF
+    AMFContext         *context; ///< AMF context
+    //encoder
+    AMFComponent       *encoder; ///< AMF encoder object
+    amf_bool            eof;     ///< flag indicating EOF happened
+    AMF_SURFACE_FORMAT  format;  ///< AMF surface format
+
+    AVBufferRef        *hw_device_ctx; ///< pointer to HW accelerator (decoder)
+    AVBufferRef        *hw_frames_ctx; ///< pointer to HW accelerator (frame allocator)
+
+    // helpers to handle async calls
+    int                 delayed_drain;
+    AMFSurface         *delayed_surface;
+    AVFrame            *delayed_frame;
+
+    // shift dts back by max_b_frames in timing
+    AVFifoBuffer       *timestamp_list;
+    int64_t             timestamp_last;
+    int64_t             dts_delay;
+
+    // common encoder options
+    int                 log_to_dbg;
+    char                *writer_id;
+
+    // Static options, have to be set before Init() call
+    int                 usage;
+    int                 profile;
+    int                 level;
+    int                 preanalysis;
+    int                 quality;
+    int                 b_frame_delta_qp;
+    int                 ref_b_frame_delta_qp;
+
+    // Dynamic options, can be set after Init() call
+
+    int                 rate_control_mode;
+    int                 enforce_hrd;
+    int                 filler_data;
+    int                 enable_vbaq;
+    int                 skip_frame;
+    int                 qp_i;
+    int                 qp_p;
+    int                 qp_b;
+    int                 max_au_size;
+    int                 header_spacing;
+    int                 b_frame_ref;
+    int                 intra_refresh_mb;
+    int                 coding_mode;
+    int                 me_half_pel;
+    int                 me_quarter_pel;
+    int                 aud;
+
+    // HEVC - specific options
+
+    int                 gops_per_idr;
+    int                 header_insertion_mode;
+    int                 min_qp_i;
+    int                 max_qp_i;
+    int                 min_qp_p;
+    int                 max_qp_p;
+    int                 tier;
+} AmfContext;
+
+/**
+* Common encoder initization function
+*/
+int ff_amf_encode_init(AVCodecContext *avctx);
+/**
+* Common encoder termination function
+*/
+int ff_amf_encode_close(AVCodecContext *avctx);
+
+/**
+* Ecoding one frame - common function for all AMF encoders
+*/
+
+int ff_amf_send_frame(AVCodecContext *avctx, const AVFrame *frame);
+int ff_amf_receive_packet(AVCodecContext *avctx, AVPacket *avpkt);
+
+/**
+* Supported formats
+*/
+extern const enum AVPixelFormat ff_amf_pix_fmts[];
+
+/**
+* Error handling helper
+*/
+#define AMF_RETURN_IF_FALSE(avctx, exp, ret_value, /*message,*/ ...) \
+    if (!(exp)) { \
+        av_log(avctx, AV_LOG_ERROR, __VA_ARGS__); \
+        return ret_value; \
+    }
+
+#define AMF_COMMON_OPTIONS \
+    { "log_to_dbg",     "Enable AMF logging to debug output",   OFFSET(log_to_dbg), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE }, \
+    { "writer_id",      "Enable AMF logging to writer id",      OFFSET(writer_id),  AV_OPT_TYPE_STRING, { .str = "libavcodec" }, 0, 1, VE } \
+
+#endif //AVCODEC_AMFENC_H