lavc: Add support for RockChip Media Process Platform

This adds hardware decoding for H.264 / HEVC / VP8 / VP9 using the MPP
Rockchip API.  It returns frames holding an AVDRMFrameDescriptor struct
in buf[0] that allows drm / dmabuf usage.  Tested on RK3288 (TinkerBoard)
and RK3328.

Signed-off-by: Mark Thompson <sw@jkqxz.net>

Changelog

@@ -50,6 +50,7 @@ version <next>:
 - KMS screen grabber
 - CUDA thumbnail filter
 - V4L2 mem2mem HW assisted codecs
+- Rockchip MPP hardware decoding
 
 
 version 3.3:

configure

@@ -316,6 +316,7 @@ External library support:
   --disable-nvenc          disable Nvidia video encoding code [autodetect]
   --enable-omx             enable OpenMAX IL code [no]
   --enable-omx-rpi         enable OpenMAX IL code for Raspberry Pi [no]
+  --enable-rkmpp           enable Rockchip Media Process Platform code [no]
   --disable-vaapi          disable Video Acceleration API (mainly Unix/Intel) code [autodetect]
   --disable-vda            disable Apple Video Decode Acceleration code [autodetect]
   --disable-vdpau          disable Nvidia Video Decode and Presentation API for Unix code [autodetect]
@@ -1567,6 +1568,7 @@ EXTERNAL_LIBRARY_VERSION3_LIST="
     libopencore_amrnb
     libopencore_amrwb
     libvo_amrwbenc
+    rkmpp
 "
 
 EXTERNAL_LIBRARY_GPLV3_LIST="
@@ -2801,6 +2803,8 @@ h264_qsv_decoder_deps="libmfx"
 h264_qsv_decoder_select="h264_mp4toannexb_bsf h264_parser qsvdec h264_qsv_hwaccel"
 h264_qsv_encoder_deps="libmfx"
 h264_qsv_encoder_select="qsvenc"
+h264_rkmpp_decoder_deps="rkmpp"
+h264_rkmpp_decoder_select="h264_mp4toannexb_bsf"
 h264_vaapi_encoder_deps="VAEncPictureParameterBufferH264"
 h264_vaapi_encoder_select="vaapi_encode golomb"
 h264_vda_decoder_deps="vda"
@@ -2818,6 +2822,8 @@ hevc_qsv_decoder_deps="libmfx"
 hevc_qsv_decoder_select="hevc_mp4toannexb_bsf hevc_parser qsvdec hevc_qsv_hwaccel"
 hevc_qsv_encoder_deps="libmfx"
 hevc_qsv_encoder_select="hevcparse qsvenc"
+hevc_rkmpp_decoder_deps="rkmpp"
+hevc_rkmpp_decoder_select="hevc_mp4toannexb_bsf"
 hevc_vaapi_encoder_deps="VAEncPictureParameterBufferHEVC"
 hevc_vaapi_encoder_select="vaapi_encode golomb"
 hevc_v4l2m2m_decoder_deps="v4l2_m2m hevc_v4l2_m2m"
@@ -2864,12 +2870,14 @@ vp8_cuvid_decoder_deps="cuda cuvid"
 vp8_mediacodec_decoder_deps="mediacodec"
 vp8_qsv_decoder_deps="libmfx"
 vp8_qsv_decoder_select="qsvdec vp8_qsv_hwaccel vp8_parser"
+vp8_rkmpp_decoder_deps="rkmpp"
 vp8_vaapi_encoder_deps="VAEncPictureParameterBufferVP8"
 vp8_vaapi_encoder_select="vaapi_encode"
 vp8_v4l2m2m_decoder_deps="v4l2_m2m vp8_v4l2_m2m"
 vp8_v4l2m2m_encoder_deps="v4l2_m2m vp8_v4l2_m2m"
 vp9_cuvid_decoder_deps="cuda cuvid"
 vp9_mediacodec_decoder_deps="mediacodec"
+vp9_rkmpp_decoder_deps="rkmpp"
 vp9_vaapi_encoder_deps="VAEncPictureParameterBufferVP9"
 vp9_vaapi_encoder_select="vaapi_encode"
 vp9_v4l2m2m_decoder_deps="v4l2_m2m vp9_v4l2_m2m"
@@ -6066,6 +6074,13 @@ enabled openssl           && { use_pkg_config "" openssl openssl/ssl.h OPENSSL_i
                                check_lib openssl openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
                                check_lib openssl openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
                                die "ERROR: openssl not found"; }
+enabled rkmpp             && { { require_pkg_config rockchip_mpp rockchip_mpp rockchip/rk_mpi.h mpp_create ||
+                                 die "ERROR : Rockchip MPP was not found."; } &&
+                               { check_func_headers rockchip/rk_mpi_cmd.h "MPP_DEC_GET_FREE_PACKET_SLOT_COUNT" ||
+                                 die "ERROR: Rockchip MPP is outdated, please get a more recent one."; } &&
+                               { enabled libdrm ||
+                                 die "ERROR: rkmpp requires --enable-libdrm"; }
+                             }
 
 if enabled gcrypt; then
     GCRYPT_CONFIG="${cross_prefix}libgcrypt-config"

libavcodec/Makefile

@@ -341,6 +341,7 @@ OBJS-$(CONFIG_H264_VDA_DECODER)        += vda_h264_dec.o
 OBJS-$(CONFIG_H264_OMX_ENCODER)        += omx.o
 OBJS-$(CONFIG_H264_QSV_DECODER)        += qsvdec_h2645.o
 OBJS-$(CONFIG_H264_QSV_ENCODER)        += qsvenc_h264.o
+OBJS-$(CONFIG_H264_RKMPP_DECODER)      += rkmppdec.o
 OBJS-$(CONFIG_H264_VAAPI_ENCODER)      += vaapi_encode_h264.o vaapi_encode_h26x.o
 OBJS-$(CONFIG_H264_VIDEOTOOLBOX_ENCODER) += videotoolboxenc.o
 OBJS-$(CONFIG_H264_V4L2M2M_DECODER)    += v4l2_m2m_dec.o
@@ -357,6 +358,7 @@ OBJS-$(CONFIG_NVENC_HEVC_ENCODER)      += nvenc_hevc.o
 OBJS-$(CONFIG_HEVC_QSV_DECODER)        += qsvdec_h2645.o
 OBJS-$(CONFIG_HEVC_QSV_ENCODER)        += qsvenc_hevc.o hevc_ps_enc.o       \
                                           hevc_data.o
+OBJS-$(CONFIG_HEVC_RKMPP_DECODER)      += rkmppdec.o
 OBJS-$(CONFIG_HEVC_VAAPI_ENCODER)      += vaapi_encode_h265.o vaapi_encode_h26x.o
 OBJS-$(CONFIG_HEVC_V4L2M2M_DECODER)    += v4l2_m2m_dec.o
 OBJS-$(CONFIG_HEVC_V4L2M2M_ENCODER)    += v4l2_m2m_enc.o
@@ -636,6 +638,7 @@ OBJS-$(CONFIG_VP8_DECODER)             += vp8.o vp56rac.o
 OBJS-$(CONFIG_VP8_CUVID_DECODER)       += cuvid.o
 OBJS-$(CONFIG_VP8_MEDIACODEC_DECODER)  += mediacodecdec.o
 OBJS-$(CONFIG_VP8_QSV_DECODER)         += qsvdec_other.o
+OBJS-$(CONFIG_VP8_RKMPP_DECODER)       += rkmppdec.o
 OBJS-$(CONFIG_VP8_VAAPI_ENCODER)       += vaapi_encode_vp8.o
 OBJS-$(CONFIG_VP8_V4L2M2M_DECODER)     += v4l2_m2m_dec.o
 OBJS-$(CONFIG_VP8_V4L2M2M_ENCODER)     += v4l2_m2m_enc.o
@@ -644,6 +647,7 @@ OBJS-$(CONFIG_VP9_DECODER)             += vp9.o vp9data.o vp9dsp.o vp9lpf.o vp9r
                                           vp9dsp_8bpp.o vp9dsp_10bpp.o vp9dsp_12bpp.o
 OBJS-$(CONFIG_VP9_CUVID_DECODER)       += cuvid.o
 OBJS-$(CONFIG_VP9_MEDIACODEC_DECODER)  += mediacodecdec.o
+OBJS-$(CONFIG_VP9_RKMPP_DECODER)       += rkmppdec.o
 OBJS-$(CONFIG_VP9_VAAPI_ENCODER)       += vaapi_encode_vp9.o
 OBJS-$(CONFIG_VPLAYER_DECODER)         += textdec.o ass.o
 OBJS-$(CONFIG_VP9_V4L2M2M_DECODER)     += v4l2_m2m_dec.o

libavcodec/allcodecs.c

@@ -215,6 +215,7 @@ static void register_all(void)
     REGISTER_DECODER(H264_MEDIACODEC,   h264_mediacodec);
     REGISTER_DECODER(H264_MMAL,         h264_mmal);
     REGISTER_DECODER(H264_QSV,          h264_qsv);
+    REGISTER_DECODER(H264_RKMPP,        h264_rkmpp);
     REGISTER_DECODER(H264_VDA,          h264_vda);
 #if FF_API_VDPAU
     REGISTER_DECODER(H264_VDPAU,        h264_vdpau);
@@ -222,6 +223,7 @@ static void register_all(void)
     REGISTER_ENCDEC (HAP,               hap);
     REGISTER_DECODER(HEVC,              hevc);
     REGISTER_DECODER(HEVC_QSV,          hevc_qsv);
+    REGISTER_DECODER(HEVC_RKMPP,        hevc_rkmpp);
     REGISTER_ENCDEC (HEVC_V4L2M2M,      hevc_v4l2m2m);
     REGISTER_DECODER(HNM4_VIDEO,        hnm4_video);
     REGISTER_DECODER(HQ_HQA,            hq_hqa);
@@ -380,8 +382,10 @@ static void register_all(void)
     REGISTER_DECODER(VP6F,              vp6f);
     REGISTER_DECODER(VP7,               vp7);
     REGISTER_DECODER(VP8,               vp8);
+    REGISTER_DECODER(VP8_RKMPP,         vp8_rkmpp);
     REGISTER_ENCDEC (VP8_V4L2M2M,       vp8_v4l2m2m);
     REGISTER_DECODER(VP9,               vp9);
+    REGISTER_DECODER(VP9_RKMPP,         vp9_rkmpp);
     REGISTER_DECODER(VP9_V4L2M2M,       vp9_v4l2m2m);
     REGISTER_DECODER(VQA,               vqa);
     REGISTER_DECODER(BITPACKED,         bitpacked);

libavcodec/rkmppdec.c

@@ -0,0 +1,596 @@
+/*
+ * RockChip MPP Video Decoder
+ * Copyright (c) 2017 Lionel CHAZALLON
+ *
+ * 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 <drm_fourcc.h>
+#include <pthread.h>
+#include <rockchip/mpp_buffer.h>
+#include <rockchip/rk_mpi.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "avcodec.h"
+#include "decode.h"
+#include "internal.h"
+#include "libavutil/buffer.h"
+#include "libavutil/common.h"
+#include "libavutil/frame.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_drm.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/log.h"
+
+#define RECEIVE_FRAME_TIMEOUT   100
+#define FRAMEGROUP_MAX_FRAMES   16
+
+typedef struct {
+    MppCtx ctx;
+    MppApi *mpi;
+    MppBufferGroup frame_group;
+
+    char first_frame;
+    char first_packet;
+    char eos_reached;
+
+    AVBufferRef *frames_ref;
+    AVBufferRef *device_ref;
+} RKMPPDecoder;
+
+typedef struct {
+    AVClass *av_class;
+    AVBufferRef *decoder_ref;
+} RKMPPDecodeContext;
+
+typedef struct {
+    MppFrame frame;
+    AVBufferRef *decoder_ref;
+} RKMPPFrameContext;
+
+static MppCodingType rkmpp_get_codingtype(AVCodecContext *avctx)
+{
+    switch (avctx->codec_id) {
+    case AV_CODEC_ID_H264:          return MPP_VIDEO_CodingAVC;
+    case AV_CODEC_ID_HEVC:          return MPP_VIDEO_CodingHEVC;
+    case AV_CODEC_ID_VP8:           return MPP_VIDEO_CodingVP8;
+    case AV_CODEC_ID_VP9:           return MPP_VIDEO_CodingVP9;
+    default:                        return MPP_VIDEO_CodingUnused;
+    }
+}
+
+static uint32_t rkmpp_get_frameformat(MppFrameFormat mppformat)
+{
+    switch (mppformat) {
+    case MPP_FMT_YUV420SP:          return DRM_FORMAT_NV12;
+#ifdef DRM_FORMAT_NV12_10
+    case MPP_FMT_YUV420SP_10BIT:    return DRM_FORMAT_NV12_10;
+#endif
+    default:                        return 0;
+    }
+}
+
+static int rkmpp_write_data(AVCodecContext *avctx, uint8_t *buffer, int size, int64_t pts)
+{
+    RKMPPDecodeContext *rk_context = avctx->priv_data;
+    RKMPPDecoder *decoder = (RKMPPDecoder *)rk_context->decoder_ref->data;
+    int ret;
+    MppPacket packet;
+
+    // create the MPP packet
+    ret = mpp_packet_init(&packet, buffer, size);
+    if (ret != MPP_OK) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to init MPP packet (code = %d)\n", ret);
+        return AVERROR_UNKNOWN;
+    }
+
+    mpp_packet_set_pts(packet, pts);
+
+    if (!buffer)
+        mpp_packet_set_eos(packet);
+
+    ret = decoder->mpi->decode_put_packet(decoder->ctx, packet);
+    if (ret != MPP_OK) {
+        if (ret == MPP_ERR_BUFFER_FULL) {
+            av_log(avctx, AV_LOG_DEBUG, "Buffer full writing %d bytes to decoder\n", size);
+            ret = AVERROR(EAGAIN);
+        } else
+            ret = AVERROR_UNKNOWN;
+    }
+    else
+        av_log(avctx, AV_LOG_DEBUG, "Wrote %d bytes to decoder\n", size);
+
+    mpp_packet_deinit(&packet);
+
+    return ret;
+}
+
+static int rkmpp_close_decoder(AVCodecContext *avctx)
+{
+    RKMPPDecodeContext *rk_context = avctx->priv_data;
+    av_buffer_unref(&rk_context->decoder_ref);
+    return 0;
+}
+
+static void rkmpp_release_decoder(void *opaque, uint8_t *data)
+{
+    RKMPPDecoder *decoder = (RKMPPDecoder *)data;
+
+    if (decoder->mpi) {
+        decoder->mpi->reset(decoder->ctx);
+        mpp_destroy(decoder->ctx);
+        decoder->ctx = NULL;
+    }
+
+    if (decoder->frame_group) {
+        mpp_buffer_group_put(decoder->frame_group);
+        decoder->frame_group = NULL;
+    }
+
+    av_buffer_unref(&decoder->frames_ref);
+    av_buffer_unref(&decoder->device_ref);
+
+    av_free(decoder);
+}
+
+static int rkmpp_init_decoder(AVCodecContext *avctx)
+{
+    RKMPPDecodeContext *rk_context = avctx->priv_data;
+    RKMPPDecoder *decoder = NULL;
+    MppCodingType codectype = MPP_VIDEO_CodingUnused;
+    int ret;
+    RK_S64 paramS64;
+    RK_S32 paramS32;
+
+    avctx->pix_fmt = AV_PIX_FMT_DRM_PRIME;
+
+    // create a decoder and a ref to it
+    decoder = av_mallocz(sizeof(RKMPPDecoder));
+    if (!decoder) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    rk_context->decoder_ref = av_buffer_create((uint8_t *)decoder, sizeof(*decoder), rkmpp_release_decoder,
+                                               NULL, AV_BUFFER_FLAG_READONLY);
+    if (!rk_context->decoder_ref) {
+        av_free(decoder);
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    av_log(avctx, AV_LOG_DEBUG, "Initializing RKMPP decoder.\n");
+
+    codectype = rkmpp_get_codingtype(avctx);
+    if (codectype == MPP_VIDEO_CodingUnused) {
+        av_log(avctx, AV_LOG_ERROR, "Unknown codec type (%d).\n", avctx->codec_id);
+        ret = AVERROR_UNKNOWN;
+        goto fail;
+    }
+
+    ret = mpp_check_support_format(MPP_CTX_DEC, codectype);
+    if (ret != MPP_OK) {
+        av_log(avctx, AV_LOG_ERROR, "Codec type (%d) unsupported by MPP\n", avctx->codec_id);
+        ret = AVERROR_UNKNOWN;
+        goto fail;
+    }
+
+    // Create the MPP context
+    ret = mpp_create(&decoder->ctx, &decoder->mpi);
+    if (ret != MPP_OK) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to create MPP context (code = %d).\n", ret);
+        ret = AVERROR_UNKNOWN;
+        goto fail;
+    }
+
+    // initialize mpp
+    ret = mpp_init(decoder->ctx, MPP_CTX_DEC, codectype);
+    if (ret != MPP_OK) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to initialize MPP context (code = %d).\n", ret);
+        ret = AVERROR_UNKNOWN;
+        goto fail;
+    }
+
+    // make decode calls blocking with a timeout
+    paramS32 = MPP_POLL_BLOCK;
+    ret = decoder->mpi->control(decoder->ctx, MPP_SET_OUTPUT_BLOCK, &paramS32);
+    if (ret != MPP_OK) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to set blocking mode on MPI (code = %d).\n", ret);
+        ret = AVERROR_UNKNOWN;
+        goto fail;
+    }
+
+    paramS64 = RECEIVE_FRAME_TIMEOUT;
+    ret = decoder->mpi->control(decoder->ctx, MPP_SET_OUTPUT_BLOCK_TIMEOUT, &paramS64);
+    if (ret != MPP_OK) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to set block timeout on MPI (code = %d).\n", ret);
+        ret = AVERROR_UNKNOWN;
+        goto fail;
+    }
+
+    ret = mpp_buffer_group_get_internal(&decoder->frame_group, MPP_BUFFER_TYPE_ION);
+    if (ret) {
+       av_log(avctx, AV_LOG_ERROR, "Failed to retrieve buffer group (code = %d)\n", ret);
+       ret = AVERROR_UNKNOWN;
+       goto fail;
+    }
+
+    ret = decoder->mpi->control(decoder->ctx, MPP_DEC_SET_EXT_BUF_GROUP, decoder->frame_group);
+    if (ret) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to assign buffer group (code = %d)\n", ret);
+        ret = AVERROR_UNKNOWN;
+        goto fail;
+    }
+
+    ret = mpp_buffer_group_limit_config(decoder->frame_group, 0, FRAMEGROUP_MAX_FRAMES);
+    if (ret) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to set buffer group limit (code = %d)\n", ret);
+        ret = AVERROR_UNKNOWN;
+        goto fail;
+    }
+
+    decoder->first_packet = 1;
+
+    av_log(avctx, AV_LOG_DEBUG, "RKMPP decoder initialized successfully.\n");
+
+    decoder->device_ref = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_DRM);
+    if (!decoder->device_ref) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+    ret = av_hwdevice_ctx_init(decoder->device_ref);
+    if (ret < 0)
+        goto fail;
+
+    return 0;
+
+fail:
+    av_log(avctx, AV_LOG_ERROR, "Failed to initialize RKMPP decoder.\n");
+    rkmpp_close_decoder(avctx);
+    return ret;
+}
+
+static int rkmpp_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
+{
+    RKMPPDecodeContext *rk_context = avctx->priv_data;
+    RKMPPDecoder *decoder = (RKMPPDecoder *)rk_context->decoder_ref->data;
+    int ret;
+
+    // handle EOF
+    if (!avpkt->size) {
+        av_log(avctx, AV_LOG_DEBUG, "End of stream.\n");
+        decoder->eos_reached = 1;
+        ret = rkmpp_write_data(avctx, NULL, 0, 0);
+        if (ret)
+            av_log(avctx, AV_LOG_ERROR, "Failed to send EOS to decoder (code = %d)\n", ret);
+        return ret;
+    }
+
+    // on first packet, send extradata
+    if (decoder->first_packet) {
+        if (avctx->extradata_size) {
+            ret = rkmpp_write_data(avctx, avctx->extradata,
+                                            avctx->extradata_size,
+                                            avpkt->pts);
+            if (ret) {
+                av_log(avctx, AV_LOG_ERROR, "Failed to write extradata to decoder (code = %d)\n", ret);
+                return ret;
+            }
+        }
+        decoder->first_packet = 0;
+    }
+
+    // now send packet
+    ret = rkmpp_write_data(avctx, avpkt->data, avpkt->size, avpkt->pts);
+    if (ret && ret!=AVERROR(EAGAIN))
+        av_log(avctx, AV_LOG_ERROR, "Failed to write data to decoder (code = %d)\n", ret);
+
+    return ret;
+}
+
+static void rkmpp_release_frame(void *opaque, uint8_t *data)
+{
+    AVDRMFrameDescriptor *desc = (AVDRMFrameDescriptor *)data;
+    AVBufferRef *framecontextref = (AVBufferRef *)opaque;
+    RKMPPFrameContext *framecontext = (RKMPPFrameContext *)framecontextref->data;
+
+    mpp_frame_deinit(&framecontext->frame);
+    av_buffer_unref(&framecontext->decoder_ref);
+    av_buffer_unref(&framecontextref);
+
+    av_free(desc);
+}
+
+static int rkmpp_retrieve_frame(AVCodecContext *avctx, AVFrame *frame)
+{
+    RKMPPDecodeContext *rk_context = avctx->priv_data;
+    RKMPPDecoder *decoder = (RKMPPDecoder *)rk_context->decoder_ref->data;
+    RKMPPFrameContext *framecontext = NULL;
+    AVBufferRef *framecontextref = NULL;
+    int ret;
+    MppFrame mppframe = NULL;
+    MppBuffer buffer = NULL;
+    AVDRMFrameDescriptor *desc = NULL;
+    AVDRMLayerDescriptor *layer = NULL;
+    int retrycount = 0;
+    int mode;
+    MppFrameFormat mppformat;
+    uint32_t drmformat;
+
+    // on start of decoding, MPP can return -1, which is supposed to be expected
+    // this is due to some internal MPP init which is not completed, that will
+    // only happen in the first few frames queries, but should not be interpreted
+    // as an error, Therefore we need to retry a couple times when we get -1
+    // in order to let it time to complete it's init, then we sleep a bit between retries.
+retry_get_frame:
+    ret = decoder->mpi->decode_get_frame(decoder->ctx, &mppframe);
+    if (ret != MPP_OK && ret != MPP_ERR_TIMEOUT && !decoder->first_frame) {
+        if (retrycount < 5) {
+            av_log(avctx, AV_LOG_DEBUG, "Failed to get a frame, retrying (code = %d, retrycount = %d)\n", ret, retrycount);
+            usleep(10000);
+            retrycount++;
+            goto retry_get_frame;
+        } else {
+            av_log(avctx, AV_LOG_ERROR, "Failed to get a frame from MPP (code = %d)\n", ret);
+            goto fail;
+        }
+    }
+
+    if (mppframe) {
+        // Check wether we have a special frame or not
+        if (mpp_frame_get_info_change(mppframe)) {
+            AVHWFramesContext *hwframes;
+
+            av_log(avctx, AV_LOG_INFO, "Decoder noticed an info change (%dx%d), format=%d\n",
+                                        (int)mpp_frame_get_width(mppframe), (int)mpp_frame_get_height(mppframe),
+                                        (int)mpp_frame_get_fmt(mppframe));
+
+            avctx->width = mpp_frame_get_width(mppframe);
+            avctx->height = mpp_frame_get_height(mppframe);
+
+            decoder->mpi->control(decoder->ctx, MPP_DEC_SET_INFO_CHANGE_READY, NULL);
+            decoder->first_frame = 1;
+
+            av_buffer_unref(&decoder->frames_ref);
+
+            decoder->frames_ref = av_hwframe_ctx_alloc(decoder->device_ref);
+            if (!decoder->frames_ref) {
+                ret = AVERROR(ENOMEM);
+                goto fail;
+            }
+
+            mppformat = mpp_frame_get_fmt(mppframe);
+            drmformat = rkmpp_get_frameformat(mppformat);
+
+            hwframes = (AVHWFramesContext*)decoder->frames_ref->data;
+            hwframes->format    = AV_PIX_FMT_DRM_PRIME;
+            hwframes->sw_format = drmformat == DRM_FORMAT_NV12 ? AV_PIX_FMT_NV12 : AV_PIX_FMT_NONE;
+            hwframes->width     = avctx->width;
+            hwframes->height    = avctx->height;
+            ret = av_hwframe_ctx_init(decoder->frames_ref);
+            if (ret < 0)
+                goto fail;
+
+            // here decoder is fully initialized, we need to feed it again with data
+            ret = AVERROR(EAGAIN);
+            goto fail;
+        } else if (mpp_frame_get_eos(mppframe)) {
+            av_log(avctx, AV_LOG_DEBUG, "Received a EOS frame.\n");
+            decoder->eos_reached = 1;
+            ret = AVERROR_EOF;
+            goto fail;
+        } else if (mpp_frame_get_discard(mppframe)) {
+            av_log(avctx, AV_LOG_DEBUG, "Received a discard frame.\n");
+            ret = AVERROR(EAGAIN);
+            goto fail;
+        } else if (mpp_frame_get_errinfo(mppframe)) {
+            av_log(avctx, AV_LOG_ERROR, "Received a errinfo frame.\n");
+            ret = AVERROR_UNKNOWN;
+            goto fail;
+        }
+
+        // here we should have a valid frame
+        av_log(avctx, AV_LOG_DEBUG, "Received a frame.\n");
+
+        // setup general frame fields
+        frame->format           = AV_PIX_FMT_DRM_PRIME;
+        frame->width            = mpp_frame_get_width(mppframe);
+        frame->height           = mpp_frame_get_height(mppframe);
+        frame->pts              = mpp_frame_get_pts(mppframe);
+        frame->color_range      = mpp_frame_get_color_range(mppframe);
+        frame->color_primaries  = mpp_frame_get_color_primaries(mppframe);
+        frame->color_trc        = mpp_frame_get_color_trc(mppframe);
+        frame->colorspace       = mpp_frame_get_colorspace(mppframe);
+
+        mode = mpp_frame_get_mode(mppframe);
+        frame->interlaced_frame = ((mode & MPP_FRAME_FLAG_FIELD_ORDER_MASK) == MPP_FRAME_FLAG_DEINTERLACED);
+        frame->top_field_first  = ((mode & MPP_FRAME_FLAG_FIELD_ORDER_MASK) == MPP_FRAME_FLAG_TOP_FIRST);
+
+        mppformat = mpp_frame_get_fmt(mppframe);
+        drmformat = rkmpp_get_frameformat(mppformat);
+
+        // now setup the frame buffer info
+        buffer = mpp_frame_get_buffer(mppframe);
+        if (buffer) {
+            desc = av_mallocz(sizeof(AVDRMFrameDescriptor));
+            if (!desc) {
+                ret = AVERROR(ENOMEM);
+                goto fail;
+            }
+
+            desc->nb_objects = 1;
+            desc->objects[0].fd = mpp_buffer_get_fd(buffer);
+            desc->objects[0].size = mpp_buffer_get_size(buffer);
+
+            desc->nb_layers = 1;
+            layer = &desc->layers[0];
+            layer->format = drmformat;
+            layer->nb_planes = 2;
+
+            layer->planes[0].object_index = 0;
+            layer->planes[0].offset = 0;
+            layer->planes[0].pitch = mpp_frame_get_hor_stride(mppframe);
+
+            layer->planes[1].object_index = 0;
+            layer->planes[1].offset = layer->planes[0].pitch * mpp_frame_get_ver_stride(mppframe);
+            layer->planes[1].pitch = layer->planes[0].pitch;
+
+            // we also allocate a struct in buf[0] that will allow to hold additionnal information
+            // for releasing properly MPP frames and decoder
+            framecontextref = av_buffer_allocz(sizeof(*framecontext));
+            if (!framecontextref) {
+                ret = AVERROR(ENOMEM);
+                goto fail;
+            }
+
+            // MPP decoder needs to be closed only when all frames have been released.
+            framecontext = (RKMPPFrameContext *)framecontextref->data;
+            framecontext->decoder_ref = av_buffer_ref(rk_context->decoder_ref);
+            framecontext->frame = mppframe;
+
+            frame->data[0]  = (uint8_t *)desc;
+            frame->buf[0]   = av_buffer_create((uint8_t *)desc, sizeof(*desc), rkmpp_release_frame,
+                                               framecontextref, AV_BUFFER_FLAG_READONLY);
+
+            if (!frame->buf[0]) {
+                ret = AVERROR(ENOMEM);
+                goto fail;
+            }
+
+            frame->hw_frames_ctx = av_buffer_ref(decoder->frames_ref);
+            if (!frame->hw_frames_ctx) {
+                ret = AVERROR(ENOMEM);
+                goto fail;
+            }
+
+            decoder->first_frame = 0;
+            return 0;
+        } else {
+            av_log(avctx, AV_LOG_ERROR, "Failed to retrieve the frame buffer, frame is dropped (code = %d)\n", ret);
+            mpp_frame_deinit(&mppframe);
+        }
+    } else if (decoder->eos_reached) {
+        return AVERROR_EOF;
+    } else if (ret == MPP_ERR_TIMEOUT) {
+        av_log(avctx, AV_LOG_DEBUG, "Timeout when trying to get a frame from MPP\n");
+    }
+
+    return AVERROR(EAGAIN);
+
+fail:
+    if (mppframe)
+        mpp_frame_deinit(&mppframe);
+
+    if (framecontext)
+        av_buffer_unref(&framecontext->decoder_ref);
+
+    if (framecontextref)
+        av_buffer_unref(&framecontextref);
+
+    if (desc)
+        av_free(desc);
+
+    return ret;
+}
+
+static int rkmpp_receive_frame(AVCodecContext *avctx, AVFrame *frame)
+{
+    RKMPPDecodeContext *rk_context = avctx->priv_data;
+    RKMPPDecoder *decoder = (RKMPPDecoder *)rk_context->decoder_ref->data;
+    int ret = MPP_NOK;
+    AVPacket pkt = {0};
+    RK_S32 freeslots;
+
+    if (!decoder->eos_reached) {
+        // we get the available slots in decoder
+        ret = decoder->mpi->control(decoder->ctx, MPP_DEC_GET_FREE_PACKET_SLOT_COUNT, &freeslots);
+        if (ret != MPP_OK) {
+            av_log(avctx, AV_LOG_ERROR, "Failed to get decoder free slots (code = %d).\n", ret);
+            return ret;
+        }
+
+        if (freeslots > 0) {
+            ret = ff_decode_get_packet(avctx, &pkt);
+            if (ret < 0 && ret != AVERROR_EOF) {
+                return ret;
+            }
+
+            ret = rkmpp_send_packet(avctx, &pkt);
+            av_packet_unref(&pkt);
+
+            if (ret < 0) {
+                av_log(avctx, AV_LOG_ERROR, "Failed to send packet to decoder (code = %d)\n", ret);
+                return ret;
+            }
+        }
+
+        // make sure we keep decoder full
+        if (freeslots > 1 && decoder->first_frame)
+            return AVERROR(EAGAIN);
+    }
+
+    return rkmpp_retrieve_frame(avctx, frame);
+}
+
+static void rkmpp_flush(AVCodecContext *avctx)
+{
+    RKMPPDecodeContext *rk_context = avctx->priv_data;
+    RKMPPDecoder *decoder = (RKMPPDecoder *)rk_context->decoder_ref->data;
+    int ret = MPP_NOK;
+
+    av_log(avctx, AV_LOG_DEBUG, "Flush.\n");
+
+    ret = decoder->mpi->reset(decoder->ctx);
+    if (ret == MPP_OK) {
+        decoder->first_frame = 1;
+        decoder->first_packet = 1;
+    } else
+        av_log(avctx, AV_LOG_ERROR, "Failed to reset MPI (code = %d)\n", ret);
+}
+
+
+#define RKMPP_DEC_CLASS(NAME) \
+    static const AVClass rkmpp_##NAME##_dec_class = { \
+        .class_name = "rkmpp_" #NAME "_dec", \
+        .version    = LIBAVUTIL_VERSION_INT, \
+    };
+
+#define RKMPP_DEC(NAME, ID, BSFS) \
+    RKMPP_DEC_CLASS(NAME) \
+    AVCodec ff_##NAME##_rkmpp_decoder = { \
+        .name           = #NAME "_rkmpp", \
+        .long_name      = NULL_IF_CONFIG_SMALL(#NAME " (rkmpp)"), \
+        .type           = AVMEDIA_TYPE_VIDEO, \
+        .id             = ID, \
+        .priv_data_size = sizeof(RKMPPDecodeContext), \
+        .init           = rkmpp_init_decoder, \
+        .close          = rkmpp_close_decoder, \
+        .receive_frame  = rkmpp_receive_frame, \
+        .flush          = rkmpp_flush, \
+        .priv_class     = &rkmpp_##NAME##_dec_class, \
+        .capabilities   = AV_CODEC_CAP_DELAY, \
+        .caps_internal  = AV_CODEC_CAP_AVOID_PROBING, \
+        .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_DRM_PRIME, \
+                                                         AV_PIX_FMT_NONE}, \
+        .bsfs           = BSFS, \
+    };
+
+RKMPP_DEC(h264,  AV_CODEC_ID_H264,          "h264_mp4toannexb")
+RKMPP_DEC(hevc,  AV_CODEC_ID_HEVC,          "hevc_mp4toannexb")
+RKMPP_DEC(vp8,   AV_CODEC_ID_VP8,           NULL)
+RKMPP_DEC(vp9,   AV_CODEC_ID_VP9,           NULL)

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  57
 #define LIBAVCODEC_VERSION_MINOR 106
-#define LIBAVCODEC_VERSION_MICRO 102
+#define LIBAVCODEC_VERSION_MICRO 103
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \