/*
* 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) {
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 = 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,
};