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ffmpeg/libavcodec/libkvazaar.c

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/*
* 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,
};
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