320 lines
10 KiB
C
Executable File
320 lines
10 KiB
C
Executable File
/*
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* libkvazaar encoder
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*
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* Copyright (c) 2015 Tampere University of Technology
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <kvazaar.h>
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#include <stdint.h>
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#include <string.h>
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#include "libavutil/attributes.h"
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#include "libavutil/avassert.h"
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#include "libavutil/dict.h"
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#include "libavutil/error.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/log.h"
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#include "libavutil/mem.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/opt.h"
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#include "avcodec.h"
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#include "internal.h"
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typedef struct LibkvazaarContext {
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const AVClass *class;
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const kvz_api *api;
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kvz_encoder *encoder;
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kvz_config *config;
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char *kvz_params;
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} LibkvazaarContext;
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static av_cold int libkvazaar_init(AVCodecContext *avctx)
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{
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LibkvazaarContext *const ctx = avctx->priv_data;
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const kvz_api *const api = ctx->api = kvz_api_get(8);
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kvz_config *cfg = NULL;
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kvz_encoder *enc = NULL;
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/* Kvazaar requires width and height to be multiples of eight. */
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if (avctx->width % 8 || avctx->height % 8) {
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av_log(avctx, AV_LOG_ERROR,
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"Video dimensions are not a multiple of 8 (%dx%d).\n",
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avctx->width, avctx->height);
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return AVERROR(ENOSYS);
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}
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ctx->config = cfg = api->config_alloc();
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if (!cfg) {
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av_log(avctx, AV_LOG_ERROR,
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"Could not allocate kvazaar config structure.\n");
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return AVERROR(ENOMEM);
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}
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if (!api->config_init(cfg)) {
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av_log(avctx, AV_LOG_ERROR,
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"Could not initialize kvazaar config structure.\n");
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return AVERROR_BUG;
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}
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cfg->width = avctx->width;
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cfg->height = avctx->height;
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if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
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if (avctx->ticks_per_frame > INT_MAX / avctx->framerate.den) {
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av_log(avctx, AV_LOG_ERROR,
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"Could not set framerate for kvazaar: integer overflow\n");
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return AVERROR(EINVAL);
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}
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cfg->framerate_num = avctx->framerate.num;
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cfg->framerate_denom = avctx->time_base.den * avctx->ticks_per_frame;
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} else {
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if (avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
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av_log(avctx, AV_LOG_ERROR,
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"Could not set framerate for kvazaar: integer overflow\n");
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return AVERROR(EINVAL);
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}
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cfg->framerate_num = avctx->time_base.den;
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cfg->framerate_denom = avctx->time_base.num * avctx->ticks_per_frame;
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}
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cfg->target_bitrate = avctx->bit_rate;
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cfg->vui.sar_width = avctx->sample_aspect_ratio.num;
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cfg->vui.sar_height = avctx->sample_aspect_ratio.den;
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if (ctx->kvz_params) {
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AVDictionary *dict = NULL;
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if (!av_dict_parse_string(&dict, ctx->kvz_params, "=", ",", 0)) {
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AVDictionaryEntry *entry = NULL;
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while ((entry = av_dict_get(dict, "", entry, AV_DICT_IGNORE_SUFFIX))) {
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if (!api->config_parse(cfg, entry->key, entry->value)) {
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av_log(avctx, AV_LOG_WARNING, "Invalid option: %s=%s.\n",
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entry->key, entry->value);
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}
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}
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}
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av_dict_free(&dict);
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}
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ctx->encoder = enc = api->encoder_open(cfg);
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if (!enc) {
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av_log(avctx, AV_LOG_ERROR, "Could not open kvazaar encoder.\n");
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return AVERROR_BUG;
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}
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if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
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kvz_data_chunk *data_out = NULL;
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kvz_data_chunk *chunk = NULL;
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uint32_t len_out;
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uint8_t *p;
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if (!api->encoder_headers(enc, &data_out, &len_out))
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return AVERROR(ENOMEM);
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avctx->extradata = p = av_mallocz(len_out + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!p) {
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ctx->api->chunk_free(data_out);
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return AVERROR(ENOMEM);
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}
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avctx->extradata_size = len_out;
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for (chunk = data_out; chunk != NULL; chunk = chunk->next) {
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memcpy(p, chunk->data, chunk->len);
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p += chunk->len;
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}
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ctx->api->chunk_free(data_out);
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}
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return 0;
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}
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static av_cold int libkvazaar_close(AVCodecContext *avctx)
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{
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LibkvazaarContext *ctx = avctx->priv_data;
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if (ctx->api) {
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ctx->api->encoder_close(ctx->encoder);
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ctx->api->config_destroy(ctx->config);
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}
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if (avctx->extradata)
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av_freep(&avctx->extradata);
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return 0;
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}
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static int libkvazaar_encode(AVCodecContext *avctx,
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AVPacket *avpkt,
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const AVFrame *frame,
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int *got_packet_ptr)
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{
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LibkvazaarContext *ctx = avctx->priv_data;
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kvz_picture *input_pic = NULL;
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kvz_picture *recon_pic = NULL;
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kvz_frame_info frame_info;
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kvz_data_chunk *data_out = NULL;
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uint32_t len_out = 0;
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int retval = 0;
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*got_packet_ptr = 0;
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if (frame) {
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if (frame->width != ctx->config->width ||
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frame->height != ctx->config->height) {
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av_log(avctx, AV_LOG_ERROR,
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"Changing video dimensions during encoding is not supported. "
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"(changed from %dx%d to %dx%d)\n",
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ctx->config->width, ctx->config->height,
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frame->width, frame->height);
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retval = AVERROR_INVALIDDATA;
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goto done;
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}
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if (frame->format != avctx->pix_fmt) {
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av_log(avctx, AV_LOG_ERROR,
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"Changing pixel format during encoding is not supported. "
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"(changed from %s to %s)\n",
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av_get_pix_fmt_name(avctx->pix_fmt),
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av_get_pix_fmt_name(frame->format));
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retval = AVERROR_INVALIDDATA;
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goto done;
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}
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// Allocate input picture for kvazaar.
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input_pic = ctx->api->picture_alloc(frame->width, frame->height);
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if (!input_pic) {
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av_log(avctx, AV_LOG_ERROR, "Failed to allocate picture.\n");
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retval = AVERROR(ENOMEM);
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goto done;
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}
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// Copy pixels from frame to input_pic.
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{
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int dst_linesizes[4] = {
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frame->width,
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frame->width / 2,
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frame->width / 2,
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0
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};
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av_image_copy(input_pic->data, dst_linesizes,
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(const uint8_t **)frame->data, frame->linesize,
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frame->format, frame->width, frame->height);
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}
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input_pic->pts = frame->pts;
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}
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retval = ctx->api->encoder_encode(ctx->encoder,
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input_pic,
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&data_out, &len_out,
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&recon_pic, NULL,
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&frame_info);
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if (!retval) {
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av_log(avctx, AV_LOG_ERROR, "Failed to encode frame.\n");
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retval = AVERROR_INVALIDDATA;
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goto done;
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} else
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retval = 0; /* kvazaar returns 1 on success */
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if (data_out) {
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kvz_data_chunk *chunk = NULL;
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uint64_t written = 0;
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retval = ff_alloc_packet2(avctx, avpkt, len_out, len_out);
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if (retval < 0) {
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av_log(avctx, AV_LOG_ERROR, "Failed to allocate output packet.\n");
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goto done;
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}
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for (chunk = data_out; chunk != NULL; chunk = chunk->next) {
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av_assert0(written + chunk->len <= len_out);
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memcpy(avpkt->data + written, chunk->data, chunk->len);
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written += chunk->len;
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}
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avpkt->pts = recon_pic->pts;
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avpkt->dts = recon_pic->dts;
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avpkt->flags = 0;
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// IRAP VCL NAL unit types span the range
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// [BLA_W_LP (16), RSV_IRAP_VCL23 (23)].
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if (frame_info.nal_unit_type >= KVZ_NAL_BLA_W_LP &&
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frame_info.nal_unit_type <= KVZ_NAL_RSV_IRAP_VCL23) {
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avpkt->flags |= AV_PKT_FLAG_KEY;
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}
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*got_packet_ptr = 1;
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}
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done:
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ctx->api->picture_free(input_pic);
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ctx->api->picture_free(recon_pic);
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ctx->api->chunk_free(data_out);
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return retval;
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}
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_NONE
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};
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#define OFFSET(x) offsetof(LibkvazaarContext, x)
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#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "kvazaar-params", "Set kvazaar parameters as a comma-separated list of key=value pairs.",
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OFFSET(kvz_params), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, VE },
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{ NULL },
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};
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static const AVClass class = {
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.class_name = "libkvazaar",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVCodecDefault defaults[] = {
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{ "b", "0" },
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{ NULL },
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};
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AVCodec ff_libkvazaar_encoder = {
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.name = "libkvazaar",
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.long_name = NULL_IF_CONFIG_SMALL("libkvazaar H.265 / HEVC"),
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_HEVC,
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.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
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.pix_fmts = pix_fmts,
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.priv_class = &class,
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.priv_data_size = sizeof(LibkvazaarContext),
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.defaults = defaults,
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.init = libkvazaar_init,
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.encode2 = libkvazaar_encode,
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.close = libkvazaar_close,
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
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.wrapper_name = "libkvazaar",
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};
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