diff options
Diffstat (limited to 'libavcodec/libkvazaar.c')
| -rw-r--r-- | libavcodec/libkvazaar.c | 248 |
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, +}; |