libavcodec/libkvazaar.c - third_party/ffmpeg - Git at Google

 /*
  * 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 <stdint.h>
 #include <string.h>

 #include "libavutil/attributes.h"
 #include "libavutil/avassert.h"
 #include "libavutil/dict.h"
 #include "libavutil/error.h"
 #include "libavutil/imgutils.h"
 #include "libavutil/internal.h"
 #include "libavutil/log.h"
 #include "libavutil/mem.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;

     /* 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;

     if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
         if (avctx->ticks_per_frame > INT_MAX / avctx->framerate.den) {
             av_log(avctx, AV_LOG_ERROR,
                    "Could not set framerate for kvazaar: integer overflow\n");
             return AVERROR(EINVAL);
         }
         cfg->framerate_num   = avctx->framerate.num;
         cfg->framerate_denom = avctx->time_base.den * avctx->ticks_per_frame;
     } else {
         if (avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
             av_log(avctx, AV_LOG_ERROR,
                    "Could not set framerate for kvazaar: integer overflow\n");
             return AVERROR(EINVAL);
         }
         cfg->framerate_num   = avctx->time_base.den;
         cfg->framerate_denom = 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;

     *got_packet_ptr = 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,
                           (const uint8_t **)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;
     } else
         retval = 0; /* kvazaar returns 1 on success */

     if (data_out) {
         kvz_data_chunk *chunk = NULL;
         uint64_t written = 0;

         retval = ff_alloc_packet2(avctx, avpkt, len_out, 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;
         }

         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 | AV_CODEC_CAP_AUTO_THREADS,
     .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,

     .wrapper_name     = "libkvazaar",
 };
	/*
	* 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 <stdint.h>
	#include <string.h>

	#include "libavutil/attributes.h"
	#include "libavutil/avassert.h"
	#include "libavutil/dict.h"
	#include "libavutil/error.h"
	#include "libavutil/imgutils.h"
	#include "libavutil/internal.h"
	#include "libavutil/log.h"
	#include "libavutil/mem.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;

	/* 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;

	if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
	if (avctx->ticks_per_frame > INT_MAX / avctx->framerate.den) {
	av_log(avctx, AV_LOG_ERROR,
	"Could not set framerate for kvazaar: integer overflow\n");
	return AVERROR(EINVAL);
	}
	cfg->framerate_num = avctx->framerate.num;
	cfg->framerate_denom = avctx->time_base.den * avctx->ticks_per_frame;
	} else {
	if (avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
	av_log(avctx, AV_LOG_ERROR,
	"Could not set framerate for kvazaar: integer overflow\n");
	return AVERROR(EINVAL);
	}
	cfg->framerate_num = avctx->time_base.den;
	cfg->framerate_denom = 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;

	*got_packet_ptr = 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,
	(const uint8_t **)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;
	} else
	retval = 0; /* kvazaar returns 1 on success */

	if (data_out) {
	kvz_data_chunk *chunk = NULL;
	uint64_t written = 0;

	retval = ff_alloc_packet2(avctx, avpkt, len_out, 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;
	}

	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 \| AV_CODEC_CAP_AUTO_THREADS,
	.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,

	.wrapper_name = "libkvazaar",
	};