avcodec: add libkvazaar HECV encoder

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

1 files changed, 248 insertions, 0 deletions

diff --git a/libavcodec/libkvazaar.c b/libavcodec/libkvazaar.c
new file mode 100644
index 0000000000..6742090b4d
--- /dev/null
+++ b/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,
+};