kvazaar: Add libkvazaar HEVC encoder

Signed-off-by: Arttu Ylä-Outinen <arttu.yla-outinen@tut.fi>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

8 files changed, 338 insertions, 2 deletions

diff --git a/Changelog b/Changelog
index 4e3b38c316..5627826de5 100644
--- a/Changelog
+++ b/Changelog
@@ -45,6 +45,7 @@ version <next>:
 - DXV decoding
 - Screenpresso SPV1 decoding
 - zero-copy Intel QSV transcoding in avconv
+- libkvazaar HEVC encoder
 
 
 version 11:
diff --git a/configure b/configure
index 40bf7255bd..f2f852e4eb 100755
--- a/configure
+++ b/configure
@@ -191,6 +191,7 @@ External library support:
   --enable-libfreetype     enable libfreetype [no]
   --enable-libgsm          enable GSM de/encoding via libgsm [no]
   --enable-libilbc         enable iLBC de/encoding via libilbc [no]
+  --enable-libkvazaar      enable HEVC encoding via libkvazaar [no]
   --enable-libmfx          enable HW acceleration through libmfx
   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
   --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
@@ -1186,6 +1187,7 @@ EXTERNAL_LIBRARY_LIST="
     libfreetype
     libgsm
     libilbc
+    libkvazaar
     libmfx
     libmp3lame
     libopencore_amrnb
@@ -2133,6 +2135,7 @@ libgsm_ms_decoder_deps="libgsm"
 libgsm_ms_encoder_deps="libgsm"
 libilbc_decoder_deps="libilbc"
 libilbc_encoder_deps="libilbc"
+libkvazaar_encoder_deps="libkvazaar"
 libmp3lame_encoder_deps="libmp3lame"
 libmp3lame_encoder_select="audio_frame_queue"
 libopencore_amrnb_decoder_deps="libopencore_amrnb"
@@ -4420,6 +4423,7 @@ enabled libgsm            && { for gsm_hdr in "gsm.h" "gsm/gsm.h"; do
                                    check_lib "${gsm_hdr}" gsm_create -lgsm && break;
                                done || die "ERROR: libgsm not found"; }
 enabled libilbc           && require libilbc ilbc.h WebRtcIlbcfix_InitDecode -lilbc
+enabled libkvazaar        && require_pkg_config "kvazaar >= 0.7.1" kvazaar.h kvz_api_get
 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame
 enabled libopencore_amrnb && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb
diff --git a/doc/encoders.texi b/doc/encoders.texi
index 779a469214..3b6f7df894 100644
--- a/doc/encoders.texi
+++ b/doc/encoders.texi
@@ -813,4 +813,25 @@ Setting a higher @option{bits_per_mb} limit will improve the speed.
 For the fastest encoding speed set the @option{qscale} parameter (4 is the
 recommended value) and do not set a size constraint.
 
+@section libkvazaar
+
+Kvazaar H.265/HEVC encoder.
+
+Requires the presence of the libkvazaar headers and library during
+configuration. You need to explicitly configure the build with
+@option{--enable-libkvazaar}.
+
+@subsection Options
+
+@table @option
+
+@item b
+Set target video bitrate in bit/s and enable rate control.
+
+@item kvazaar-params
+Set kvazaar parameters as a list of @var{name}=@var{value} pairs separated
+by commas (,). See kvazaar documentation for a list of options.
+
+@end table
+
 @c man end VIDEO ENCODERS
diff --git a/doc/general.texi b/doc/general.texi
index 6e432691cc..bddc075488 100644
--- a/doc/general.texi
+++ b/doc/general.texi
@@ -131,6 +131,14 @@ x265 is under the GNU Public License Version 2 or later
 details), you must upgrade Libav's license to GPL in order to use it.
 @end float
 
+@section kvazaar
+
+Libav can make use of the kvazaar library for HEVC encoding.
+
+Go to @url{https://github.com/ultravideo/kvazaar} and follow the
+instructions for installing the library. Then pass
+@code{--enable-libkvazaar} to configure to enable it.
+
 @section libilbc
 
 iLBC is a narrowband speech codec that has been made freely available
@@ -630,7 +638,7 @@ following image formats are supported:
 @item H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10  @tab  E  @tab  X
     @tab encoding supported through external library libx264 and OpenH264
 @item HEVC                   @tab  X  @tab  X
-    @tab encoding supported through the external library libx265
+    @tab encoding supported through external library libx265 and libkvazaar
 @item HNM version 4          @tab     @tab  X
 @item HuffYUV                @tab  X  @tab  X
 @item HuffYUV FFmpeg variant @tab  X  @tab  X
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 3e57a0d6c0..7542c07d07 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -655,6 +655,7 @@ OBJS-$(CONFIG_LIBGSM_MS_DECODER)          += libgsmdec.o
 OBJS-$(CONFIG_LIBGSM_MS_ENCODER)          += libgsmenc.o
 OBJS-$(CONFIG_LIBILBC_DECODER)            += libilbc.o
 OBJS-$(CONFIG_LIBILBC_ENCODER)            += libilbc.o
+OBJS-$(CONFIG_LIBKVAZAAR_ENCODER)         += libkvazaar.o
 OBJS-$(CONFIG_LIBMP3LAME_ENCODER)         += libmp3lame.o mpegaudiodecheader.o
 OBJS-$(CONFIG_LIBOPENCORE_AMRNB_DECODER)  += libopencore-amr.o
 OBJS-$(CONFIG_LIBOPENCORE_AMRNB_ENCODER)  += libopencore-amr.o
diff --git a/libavcodec/allcodecs.c b/libavcodec/allcodecs.c
index 46febd5b18..c0fca74b70 100644
--- a/libavcodec/allcodecs.c
+++ b/libavcodec/allcodecs.c
@@ -491,6 +491,7 @@ void avcodec_register_all(void)
     REGISTER_ENCODER(LIBOPENH264,       libopenh264);
     REGISTER_ENCODER(H264_NVENC,        h264_nvenc);
     REGISTER_ENCODER(H264_QSV,          h264_qsv);
+    REGISTER_ENCODER(LIBKVAZAAR,        libkvazaar);
     REGISTER_ENCODER(HEVC_NVENC,        hevc_nvenc);
     REGISTER_ENCODER(HEVC_QSV,          hevc_qsv);
     REGISTER_ENCODER(MPEG2_QSV,         mpeg2_qsv);
diff --git a/libavcodec/libkvazaar.c b/libavcodec/libkvazaar.c
new file mode 100644
index 0000000000..89b024a379
--- /dev/null
+++ b/libavcodec/libkvazaar.c
@@ -0,0 +1,300 @@
+/*
+ * libkvazaar encoder
+ *
+ * Copyright (c) 2015 Tampere University of Technology
+ *
+ * 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
+ */
+
+#include <kvazaar.h>
+#include <string.h>
+
+#include "libavutil/dict.h"
+#include "libavutil/error.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/internal.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.h"
+
+#include "avcodec.h"
+#include "internal.h"
+
+typedef struct LibkvazaarContext {
+    const AVClass *class;
+
+    const kvz_api *api;
+    kvz_encoder *encoder;
+    kvz_config *config;
+
+    char *kvz_params;
+} LibkvazaarContext;
+
+static av_cold int libkvazaar_init(AVCodecContext *avctx)
+{
+    LibkvazaarContext *const ctx = avctx->priv_data;
+    const kvz_api *const api = ctx->api = kvz_api_get(8);
+    kvz_config *cfg = NULL;
+    kvz_encoder *enc = NULL;
+
+    if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Set -strict experimental to use this encoder.\n");
+        return AVERROR_EXPERIMENTAL;
+    }
+
+    /* Kvazaar requires width and height to be multiples of eight. */
+    if (avctx->width % 8 || avctx->height % 8) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Video dimensions are not a multiple of 8 (%dx%d).\n",
+               avctx->width, avctx->height);
+        return AVERROR(ENOSYS);
+    }
+
+    ctx->config = cfg = api->config_alloc();
+    if (!cfg) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Could not allocate kvazaar config structure.\n");
+        return AVERROR(ENOMEM);
+    }
+
+    if (!api->config_init(cfg)) {
+        av_log(avctx, AV_LOG_ERROR,
+               "Could not initialize kvazaar config structure.\n");
+        return AVERROR_BUG;
+    }
+
+    cfg->width  = avctx->width;
+    cfg->height = avctx->height;
+
+    cfg->framerate =
+      avctx->time_base.den / (double)(avctx->time_base.num * avctx->ticks_per_frame);
+    cfg->target_bitrate = avctx->bit_rate;
+    cfg->vui.sar_width  = avctx->sample_aspect_ratio.num;
+    cfg->vui.sar_height = avctx->sample_aspect_ratio.den;
+
+    if (ctx->kvz_params) {
+        AVDictionary *dict = NULL;
+        if (!av_dict_parse_string(&dict, ctx->kvz_params, "=", ",", 0)) {
+            AVDictionaryEntry *entry = NULL;
+            while ((entry = av_dict_get(dict, "", entry, AV_DICT_IGNORE_SUFFIX))) {
+                if (!api->config_parse(cfg, entry->key, entry->value)) {
+                    av_log(avctx, AV_LOG_WARNING, "Invalid option: %s=%s.\n",
+                           entry->key, entry->value);
+                }
+            }
+            av_dict_free(&dict);
+        }
+    }
+
+    ctx->encoder = enc = api->encoder_open(cfg);
+    if (!enc) {
+        av_log(avctx, AV_LOG_ERROR, "Could not open kvazaar encoder.\n");
+        return AVERROR_BUG;
+    }
+
+    if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
+        kvz_data_chunk *data_out = NULL;
+        kvz_data_chunk *chunk = NULL;
+        uint32_t len_out;
+        uint8_t *p;
+
+        if (!api->encoder_headers(enc, &data_out, &len_out))
+            return AVERROR(ENOMEM);
+
+        avctx->extradata = p = av_mallocz(len_out + AV_INPUT_BUFFER_PADDING_SIZE);
+        if (!p) {
+            ctx->api->chunk_free(data_out);
+            return AVERROR(ENOMEM);
+        }
+
+        avctx->extradata_size = len_out;
+
+        for (chunk = data_out; chunk != NULL; chunk = chunk->next) {
+            memcpy(p, chunk->data, chunk->len);
+            p += chunk->len;
+        }
+
+        ctx->api->chunk_free(data_out);
+    }
+
+    return 0;
+}
+
+static av_cold int libkvazaar_close(AVCodecContext *avctx)
+{
+    LibkvazaarContext *ctx = avctx->priv_data;
+
+    if (ctx->api) {
+      ctx->api->encoder_close(ctx->encoder);
+      ctx->api->config_destroy(ctx->config);
+    }
+
+    if (avctx->extradata)
+        av_freep(&avctx->extradata);
+
+    return 0;
+}
+
+static int libkvazaar_encode(AVCodecContext *avctx,
+                             AVPacket *avpkt,
+                             const AVFrame *frame,
+                             int *got_packet_ptr)
+{
+    LibkvazaarContext *ctx = avctx->priv_data;
+    kvz_picture *input_pic = NULL;
+    kvz_picture *recon_pic = NULL;
+    kvz_frame_info frame_info;
+    kvz_data_chunk *data_out = NULL;
+    uint32_t len_out = 0;
+    int retval = 0;
+
+    if (frame) {
+        if (frame->width != ctx->config->width ||
+                frame->height != ctx->config->height) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Changing video dimensions during encoding is not supported. "
+                   "(changed from %dx%d to %dx%d)\n",
+                   ctx->config->width, ctx->config->height,
+                   frame->width, frame->height);
+            retval = AVERROR_INVALIDDATA;
+            goto done;
+        }
+
+        if (frame->format != avctx->pix_fmt) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Changing pixel format during encoding is not supported. "
+                   "(changed from %s to %s)\n",
+                   av_get_pix_fmt_name(avctx->pix_fmt),
+                   av_get_pix_fmt_name(frame->format));
+            retval = AVERROR_INVALIDDATA;
+            goto done;
+        }
+
+        // Allocate input picture for kvazaar.
+        input_pic = ctx->api->picture_alloc(frame->width, frame->height);
+        if (!input_pic) {
+            av_log(avctx, AV_LOG_ERROR, "Failed to allocate picture.\n");
+            retval = AVERROR(ENOMEM);
+            goto done;
+        }
+
+        // Copy pixels from frame to input_pic.
+        {
+            int dst_linesizes[4] = {
+              frame->width,
+              frame->width / 2,
+              frame->width / 2,
+              0
+            };
+            av_image_copy(input_pic->data, dst_linesizes,
+                          frame->data, frame->linesize,
+                          frame->format, frame->width, frame->height);
+        }
+
+        input_pic->pts = frame->pts;
+    }
+
+    retval = ctx->api->encoder_encode(ctx->encoder,
+                                      input_pic,
+                                      &data_out, &len_out,
+                                      &recon_pic, NULL,
+                                      &frame_info);
+    if (!retval) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to encode frame.\n");
+        retval = AVERROR_INVALIDDATA;
+        goto done;
+    }
+
+    if (data_out) {
+        kvz_data_chunk *chunk = NULL;
+        uint64_t written = 0;
+
+        retval = ff_alloc_packet(avpkt, len_out);
+        if (retval < 0) {
+            av_log(avctx, AV_LOG_ERROR, "Failed to allocate output packet.\n");
+            goto done;
+        }
+
+        for (chunk = data_out; chunk != NULL; chunk = chunk->next) {
+            memcpy(avpkt->data + written, chunk->data, chunk->len);
+            written += chunk->len;
+        }
+
+        avpkt->pts = recon_pic->pts;
+        avpkt->dts = recon_pic->dts;
+        avpkt->flags = 0;
+        // IRAP VCL NAL unit types span the range
+        // [BLA_W_LP (16), RSV_IRAP_VCL23 (23)].
+        if (frame_info.nal_unit_type >= KVZ_NAL_BLA_W_LP &&
+                frame_info.nal_unit_type <= KVZ_NAL_RSV_IRAP_VCL23) {
+            avpkt->flags |= AV_PKT_FLAG_KEY;
+        }
+
+        *got_packet_ptr = 1;
+    }
+
+done:
+    ctx->api->picture_free(input_pic);
+    ctx->api->picture_free(recon_pic);
+    ctx->api->chunk_free(data_out);
+    return retval;
+}
+
+static const enum AVPixelFormat pix_fmts[] = {
+    AV_PIX_FMT_YUV420P,
+    AV_PIX_FMT_NONE
+};
+
+#define OFFSET(x) offsetof(LibkvazaarContext, x)
+#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "kvazaar-params", "Set kvazaar parameters as a comma-separated list of key=value pairs.",
+        OFFSET(kvz_params), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, VE },
+
+    { NULL },
+};
+
+static const AVClass class = {
+    .class_name = "libkvazaar",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVCodecDefault defaults[] = {
+    { "b", "0" },
+    { NULL },
+};
+
+AVCodec ff_libkvazaar_encoder = {
+    .name             = "libkvazaar",
+    .long_name        = NULL_IF_CONFIG_SMALL("libkvazaar H.265 / HEVC"),
+    .type             = AVMEDIA_TYPE_VIDEO,
+    .id               = AV_CODEC_ID_HEVC,
+    .capabilities     = AV_CODEC_CAP_DELAY,
+    .pix_fmts         = pix_fmts,
+
+    .priv_class       = &class,
+    .priv_data_size   = sizeof(LibkvazaarContext),
+    .defaults         = defaults,
+
+    .init             = libkvazaar_init,
+    .encode2          = libkvazaar_encode,
+    .close            = libkvazaar_close,
+
+    .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
+};
diff --git a/libavcodec/version.h b/libavcodec/version.h
index 21f5fbf2ae..ddf549abf9 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,7 +29,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 57
-#define LIBAVCODEC_VERSION_MINOR  5
+#define LIBAVCODEC_VERSION_MINOR  6
 #define LIBAVCODEC_VERSION_MICRO  0
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \