avcodec: add libkvazaar HECV encoder

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Changelog

@@ -15,6 +15,7 @@ version <next>:
 - adrawgraph audio and drawgraph video filter
 - removegrain video filter
 - Intel QSV-accelerated MPEG-2 video and HEVC encoding
+- libkvazaar HEVC encoder
 
 
 version 2.7:

configure

@@ -222,6 +222,7 @@ External library support:
   --enable-libgsm          enable GSM de/encoding via libgsm [no]
   --enable-libiec61883     enable iec61883 via libiec61883 [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-libmodplug      enable ModPlug via libmodplug [no]
   --enable-libmp3lame      enable MP3 encoding via libmp3lame [no]
@@ -1386,6 +1387,7 @@ EXTERNAL_LIBRARY_LIST="
     libgsm
     libiec61883
     libilbc
+    libkvazaar
     libmfx
     libmodplug
     libmp3lame
@@ -2464,6 +2466,7 @@ libgsm_ms_decoder_deps="libgsm"
 libgsm_ms_encoder_deps="libgsm"
 libilbc_decoder_deps="libilbc"
 libilbc_encoder_deps="libilbc"
+libkvazaar_encoder_deps="libkvazaar"
 libmodplug_demuxer_deps="libmodplug"
 libmp3lame_encoder_deps="libmp3lame"
 libmp3lame_encoder_select="audio_frame_queue"
@@ -5152,6 +5155,7 @@ 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        && require2 libkvazaar kvazaar.h kvz_api_get -lkvazaar
 enabled libmfx            && require_pkg_config libmfx "mfx/mfxvideo.h" MFXInit
 enabled libmodplug        && require_pkg_config libmodplug libmodplug/modplug.h ModPlug_Load
 enabled libmp3lame        && require "libmp3lame >= 3.98.3" lame/lame.h lame_set_VBR_quality -lmp3lame

doc/encoders.texi

@@ -2315,6 +2315,30 @@ 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 threads
+Set number of encoding threads.
+
+@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
 
 @chapter Subtitles Encoders

doc/general.texi

@@ -145,6 +145,14 @@ x265 is under the GNU Public License Version 2 or later
 details), you must upgrade FFmpeg's license to GPL in order to use it.
 @end float
 
+@section kvazaar
+
+FFmpeg 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
@@ -688,7 +696,7 @@ 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

libavcodec/Makefile

@@ -768,6 +768,7 @@ 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

libavcodec/allcodecs.c

@@ -571,6 +571,7 @@ void avcodec_register_all(void)
     REGISTER_ENCODER(NVENC_H264,        nvenc_h264);
     REGISTER_ENCODER(NVENC_HEVC,        nvenc_hevc);
     REGISTER_ENCODER(HEVC_QSV,          hevc_qsv);
+    REGISTER_ENCODER(LIBKVAZAAR,        libkvazaar);
     REGISTER_ENCODER(MPEG2_QSV,         mpeg2_qsv);
 
     /* parsers */

libavcodec/libkvazaar.c

@@ -0,0 +1,248 @@
+/*
+ * libkvazaar encoder
+ *
+ * Copyright (c) 2015 Tampere University of Technology
+ *
+ * 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 <kvazaar.h>
+#include <string.h>
+
+#include "libavutil/avassert.h"
+#include "libavutil/dict.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)
+{
+    int retval = 0;
+    kvz_config *cfg = NULL;
+    kvz_encoder *enc = NULL;
+    const kvz_api *const api = kvz_api_get(8);
+
+    LibkvazaarContext *const ctx = avctx->priv_data;
+
+    // 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.\n");
+        retval = AVERROR_INVALIDDATA;
+        goto done;
+    }
+
+    cfg = api->config_alloc();
+    if (!cfg) {
+        av_log(avctx, AV_LOG_ERROR, "Could not allocate kvazaar config structure.\n");
+        retval = AVERROR(ENOMEM);
+        goto done;
+    }
+
+    if (!api->config_init(cfg)) {
+        av_log(avctx, AV_LOG_ERROR, "Could not initialize kvazaar config structure.\n");
+        retval = AVERROR_EXTERNAL;
+        goto done;
+    }
+
+    cfg->width = avctx->width;
+    cfg->height = avctx->height;
+    cfg->framerate =
+      (double)(avctx->time_base.num * avctx->ticks_per_frame) / avctx->time_base.den;
+    cfg->threads = avctx->thread_count;
+    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);
+        }
+    }
+
+    enc = api->encoder_open(cfg);
+    if (!enc) {
+        av_log(avctx, AV_LOG_ERROR, "Could not open kvazaar encoder.\n");
+        retval = AVERROR_EXTERNAL;
+        goto done;
+    }
+
+    ctx->api = api;
+    ctx->encoder = enc;
+    ctx->config = cfg;
+    enc = NULL;
+    cfg = NULL;
+
+done:
+    if (cfg) api->config_destroy(cfg);
+    if (enc) api->encoder_close(enc);
+
+    return retval;
+}
+
+static av_cold int libkvazaar_close(AVCodecContext *avctx)
+{
+    LibkvazaarContext *ctx = avctx->priv_data;
+    if (!ctx->api) return 0;
+
+    if (ctx->encoder) {
+        ctx->api->encoder_close(ctx->encoder);
+        ctx->encoder = NULL;
+    }
+
+    if (ctx->config) {
+        ctx->api->config_destroy(ctx->config);
+        ctx->config = NULL;
+    }
+
+    return 0;
+}
+
+static int libkvazaar_encode(AVCodecContext *avctx,
+                             AVPacket *avpkt,
+                             const AVFrame *frame,
+                             int *got_packet_ptr)
+{
+    int retval = 0;
+    kvz_picture *img_in = NULL;
+    kvz_data_chunk *data_out = NULL;
+    uint32_t len_out = 0;
+    LibkvazaarContext *ctx = avctx->priv_data;
+
+    *got_packet_ptr = 0;
+
+    if (frame) {
+        int i = 0;
+
+        av_assert0(frame->width == ctx->config->width);
+        av_assert0(frame->height == ctx->config->height);
+        av_assert0(frame->format == avctx->pix_fmt);
+
+        // Allocate input picture for kvazaar.
+        img_in = ctx->api->picture_alloc(frame->width, frame->height);
+        if (!img_in) {
+            av_log(avctx, AV_LOG_ERROR, "Failed to allocate picture.\n");
+            retval = AVERROR(ENOMEM);
+            goto done;
+        }
+
+        // Copy pixels from frame to img_in.
+        for (i = 0; i < 3; ++i) {
+            uint8_t *dst = img_in->data[i];
+            uint8_t *src = frame->data[i];
+            int width = (i == 0) ? frame->width : (frame->width / 2);
+            int height = (i == 0) ? frame->height : (frame->height / 2);
+            int y = 0;
+            for (y = 0; y < height; ++y) {
+                memcpy(dst, src, width);
+                src += frame->linesize[i];
+                dst += width;
+            }
+        }
+    }
+
+    if (!ctx->api->encoder_encode(ctx->encoder, img_in, &data_out, &len_out, NULL)) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to encode frame.\n");
+        retval = AVERROR_EXTERNAL;
+        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) {
+            av_assert0(written + chunk->len <= len_out);
+            memcpy(avpkt->data + written, chunk->data, chunk->len);
+            written += chunk->len;
+        }
+        *got_packet_ptr = 1;
+
+        ctx->api->chunk_free(data_out);
+        data_out = NULL;
+    }
+
+done:
+    if (img_in) ctx->api->picture_free(img_in);
+    if (data_out) ctx->api->chunk_free(data_out);
+    return retval;
+}
+
+static const enum AVPixelFormat pix_fmts[] = {
+    AV_PIX_FMT_YUV420P,
+    AV_PIX_FMT_NONE
+};
+
+static const AVOption options[] = {
+    { "kvazaar-params", "Set kvazaar parameters as a comma-separated list of name=value pairs.",
+      offsetof(LibkvazaarContext, kvz_params), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0,
+      AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
+    { 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     = 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,
+};

libavcodec/version.h

@@ -29,7 +29,7 @@
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 56
-#define LIBAVCODEC_VERSION_MINOR  47
+#define LIBAVCODEC_VERSION_MINOR  48
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \