libavcodec/qsvdec_h264.c - third_party/ffmpeg - Git at Google

 /*
  * Intel MediaSDK QSV based H.264 decoder
  *
  * copyright (c) 2013 Luca Barbato
  * copyright (c) 2015 Anton Khirnov
  *
  * 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 <stdint.h>
 #include <string.h>

 #include <mfx/mfxvideo.h>

 #include "libavutil/common.h"
 #include "libavutil/fifo.h"
 #include "libavutil/opt.h"

 #include "avcodec.h"
 #include "internal.h"
 #include "qsv_internal.h"
 #include "qsvdec.h"
 #include "qsv.h"

 typedef struct QSVH264Context {
     AVClass *class;
     QSVContext qsv;

     // the internal parser and codec context for parsing the data
     AVCodecParserContext *parser;
     AVCodecContext *avctx_internal;
     enum AVPixelFormat orig_pix_fmt;

     // the filter for converting to Annex B
     AVBitStreamFilterContext *bsf;

     AVFifoBuffer *packet_fifo;

     AVPacket input_ref;
     AVPacket pkt_filtered;
     uint8_t *filtered_data;
 } QSVH264Context;

 static void qsv_clear_buffers(QSVH264Context *s)
 {
     AVPacket pkt;
     while (av_fifo_size(s->packet_fifo) >= sizeof(pkt)) {
         av_fifo_generic_read(s->packet_fifo, &pkt, sizeof(pkt), NULL);
         av_packet_unref(&pkt);
     }

     if (s->filtered_data != s->input_ref.data)
         av_freep(&s->filtered_data);
     s->filtered_data = NULL;
     av_packet_unref(&s->input_ref);
 }

 static av_cold int qsv_decode_close(AVCodecContext *avctx)
 {
     QSVH264Context *s = avctx->priv_data;

     ff_qsv_decode_close(&s->qsv);

     qsv_clear_buffers(s);

     av_fifo_free(s->packet_fifo);

     av_bitstream_filter_close(s->bsf);
     av_parser_close(s->parser);
     avcodec_free_context(&s->avctx_internal);

     return 0;
 }

 static av_cold int qsv_decode_init(AVCodecContext *avctx)
 {
     QSVH264Context *s = avctx->priv_data;
     int ret;

     s->orig_pix_fmt = AV_PIX_FMT_NONE;

     s->packet_fifo = av_fifo_alloc(sizeof(AVPacket));
     if (!s->packet_fifo) {
         ret = AVERROR(ENOMEM);
         goto fail;
     }

     s->bsf = av_bitstream_filter_init("h264_mp4toannexb");
     if (!s->bsf) {
         ret = AVERROR(ENOMEM);
         goto fail;
     }

     s->avctx_internal = avcodec_alloc_context3(NULL);
     if (!s->avctx_internal) {
         ret = AVERROR(ENOMEM);
         goto fail;
     }

     if (avctx->extradata) {
         s->avctx_internal->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
         if (!s->avctx_internal->extradata) {
             ret = AVERROR(ENOMEM);
             goto fail;
         }
         memcpy(s->avctx_internal->extradata, avctx->extradata,
                avctx->extradata_size);
         s->avctx_internal->extradata_size = avctx->extradata_size;
     }

     s->parser = av_parser_init(AV_CODEC_ID_H264);
     if (!s->parser) {
         ret = AVERROR(ENOMEM);
         goto fail;
     }
     s->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;

     s->qsv.iopattern = MFX_IOPATTERN_OUT_SYSTEM_MEMORY;

     return 0;
 fail:
     qsv_decode_close(avctx);
     return ret;
 }

 static int qsv_process_data(AVCodecContext *avctx, AVFrame *frame,
                             int *got_frame, AVPacket *pkt)
 {
     QSVH264Context *s = avctx->priv_data;
     uint8_t *dummy_data;
     int dummy_size;
     int ret;

     /* we assume the packets are already split properly and want
      * just the codec parameters here */
     av_parser_parse2(s->parser, s->avctx_internal,
                      &dummy_data, &dummy_size,
                      pkt->data, pkt->size, pkt->pts, pkt->dts,
                      pkt->pos);

     /* TODO: flush delayed frames on reinit */
     if (s->parser->format       != s->orig_pix_fmt    ||
         s->parser->coded_width  != avctx->coded_width ||
         s->parser->coded_height != avctx->coded_height) {
         mfxSession session = NULL;

         enum AVPixelFormat pix_fmts[3] = { AV_PIX_FMT_QSV,
                                            AV_PIX_FMT_NONE,
                                            AV_PIX_FMT_NONE };
         enum AVPixelFormat qsv_format;

         qsv_format = ff_qsv_map_pixfmt(s->parser->format);
         if (qsv_format < 0) {
             av_log(avctx, AV_LOG_ERROR,
                    "Only 8-bit YUV420 streams are supported.\n");
             ret = AVERROR(ENOSYS);
             goto reinit_fail;
         }

         s->orig_pix_fmt     = s->parser->format;
         avctx->pix_fmt      = pix_fmts[1] = qsv_format;
         avctx->width        = s->parser->width;
         avctx->height       = s->parser->height;
         avctx->coded_width  = s->parser->coded_width;
         avctx->coded_height = s->parser->coded_height;
         avctx->level        = s->avctx_internal->level;
         avctx->profile      = s->avctx_internal->profile;

         ret = ff_get_format(avctx, pix_fmts);
         if (ret < 0)
             goto reinit_fail;

         avctx->pix_fmt = ret;

         if (avctx->hwaccel_context) {
             AVQSVContext *user_ctx = avctx->hwaccel_context;
             session               = user_ctx->session;
             s->qsv.iopattern      = user_ctx->iopattern;
             s->qsv.ext_buffers    = user_ctx->ext_buffers;
             s->qsv.nb_ext_buffers = user_ctx->nb_ext_buffers;
         }

         ret = ff_qsv_decode_init(avctx, &s->qsv, session);
         if (ret < 0)
             goto reinit_fail;
     }

     return ff_qsv_decode(avctx, &s->qsv, frame, got_frame, &s->pkt_filtered);

 reinit_fail:
     s->orig_pix_fmt = s->parser->format = avctx->pix_fmt = AV_PIX_FMT_NONE;
     return ret;
 }

 static int qsv_decode_frame(AVCodecContext *avctx, void *data,
                             int *got_frame, AVPacket *avpkt)
 {
     QSVH264Context *s = avctx->priv_data;
     AVFrame *frame    = data;
     int ret;

     /* buffer the input packet */
     if (avpkt->size) {
         AVPacket input_ref = { 0 };

         if (av_fifo_space(s->packet_fifo) < sizeof(input_ref)) {
             ret = av_fifo_realloc2(s->packet_fifo,
                                    av_fifo_size(s->packet_fifo) + sizeof(input_ref));
             if (ret < 0)
                 return ret;
         }

         ret = av_packet_ref(&input_ref, avpkt);
         if (ret < 0)
             return ret;
         av_fifo_generic_write(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
     }

     /* process buffered data */
     while (!*got_frame) {
         /* prepare the input data -- convert to Annex B if needed */
         if (s->pkt_filtered.size <= 0) {
             int size;

             /* no more data */
             if (av_fifo_size(s->packet_fifo) < sizeof(AVPacket))
                 return avpkt->size ? avpkt->size : ff_qsv_decode(avctx, &s->qsv, frame, got_frame, avpkt);

             if (s->filtered_data != s->input_ref.data)
                 av_freep(&s->filtered_data);
             s->filtered_data = NULL;
             av_packet_unref(&s->input_ref);

             av_fifo_generic_read(s->packet_fifo, &s->input_ref, sizeof(s->input_ref), NULL);
             ret = av_bitstream_filter_filter(s->bsf, avctx, NULL,
                                              &s->filtered_data, &size,
                                              s->input_ref.data, s->input_ref.size, 0);
             if (ret < 0) {
                 s->filtered_data = s->input_ref.data;
                 size             = s->input_ref.size;
             }
             s->pkt_filtered      = s->input_ref;
             s->pkt_filtered.data = s->filtered_data;
             s->pkt_filtered.size = size;
         }

         ret = qsv_process_data(avctx, frame, got_frame, &s->pkt_filtered);
         if (ret < 0)
             return ret;

         s->pkt_filtered.size -= ret;
         s->pkt_filtered.data += ret;
     }

     return avpkt->size;
 }

 static void qsv_decode_flush(AVCodecContext *avctx)
 {
     QSVH264Context *s = avctx->priv_data;

     qsv_clear_buffers(s);
     s->orig_pix_fmt = AV_PIX_FMT_NONE;
 }

 AVHWAccel ff_h264_qsv_hwaccel = {
     .name           = "h264_qsv",
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_H264,
     .pix_fmt        = AV_PIX_FMT_QSV,
 };

 #define OFFSET(x) offsetof(QSVH264Context, x)
 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
 static const AVOption options[] = {
     { "async_depth", "Internal parallelization depth, the higher the value the higher the latency.", OFFSET(qsv.async_depth), AV_OPT_TYPE_INT, { .i64 = ASYNC_DEPTH_DEFAULT }, 0, INT_MAX, VD },
     { NULL },
 };

 static const AVClass class = {
     .class_name = "h264_qsv",
     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
 };

 AVCodec ff_h264_qsv_decoder = {
     .name           = "h264_qsv",
     .long_name      = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration)"),
     .priv_data_size = sizeof(QSVH264Context),
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_H264,
     .init           = qsv_decode_init,
     .decode         = qsv_decode_frame,
     .flush          = qsv_decode_flush,
     .close          = qsv_decode_close,
     .capabilities   = CODEC_CAP_DELAY,
     .priv_class     = &class,
 };
	/*
	* Intel MediaSDK QSV based H.264 decoder
	*
	* copyright (c) 2013 Luca Barbato
	* copyright (c) 2015 Anton Khirnov
	*
	* 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 <stdint.h>
	#include <string.h>

	#include <mfx/mfxvideo.h>

	#include "libavutil/common.h"
	#include "libavutil/fifo.h"
	#include "libavutil/opt.h"

	#include "avcodec.h"
	#include "internal.h"
	#include "qsv_internal.h"
	#include "qsvdec.h"
	#include "qsv.h"

	typedef struct QSVH264Context {
	AVClass *class;
	QSVContext qsv;

	// the internal parser and codec context for parsing the data
	AVCodecParserContext *parser;
	AVCodecContext *avctx_internal;
	enum AVPixelFormat orig_pix_fmt;

	// the filter for converting to Annex B
	AVBitStreamFilterContext *bsf;

	AVFifoBuffer *packet_fifo;

	AVPacket input_ref;
	AVPacket pkt_filtered;
	uint8_t *filtered_data;
	} QSVH264Context;

	static void qsv_clear_buffers(QSVH264Context *s)
	{
	AVPacket pkt;
	while (av_fifo_size(s->packet_fifo) >= sizeof(pkt)) {
	av_fifo_generic_read(s->packet_fifo, &pkt, sizeof(pkt), NULL);
	av_packet_unref(&pkt);
	}

	if (s->filtered_data != s->input_ref.data)
	av_freep(&s->filtered_data);
	s->filtered_data = NULL;
	av_packet_unref(&s->input_ref);
	}

	static av_cold int qsv_decode_close(AVCodecContext *avctx)
	{
	QSVH264Context *s = avctx->priv_data;

	ff_qsv_decode_close(&s->qsv);

	qsv_clear_buffers(s);

	av_fifo_free(s->packet_fifo);

	av_bitstream_filter_close(s->bsf);
	av_parser_close(s->parser);
	avcodec_free_context(&s->avctx_internal);

	return 0;
	}

	static av_cold int qsv_decode_init(AVCodecContext *avctx)
	{
	QSVH264Context *s = avctx->priv_data;
	int ret;

	s->orig_pix_fmt = AV_PIX_FMT_NONE;

	s->packet_fifo = av_fifo_alloc(sizeof(AVPacket));
	if (!s->packet_fifo) {
	ret = AVERROR(ENOMEM);
	goto fail;
	}

	s->bsf = av_bitstream_filter_init("h264_mp4toannexb");
	if (!s->bsf) {
	ret = AVERROR(ENOMEM);
	goto fail;
	}

	s->avctx_internal = avcodec_alloc_context3(NULL);
	if (!s->avctx_internal) {
	ret = AVERROR(ENOMEM);
	goto fail;
	}

	if (avctx->extradata) {
	s->avctx_internal->extradata = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
	if (!s->avctx_internal->extradata) {
	ret = AVERROR(ENOMEM);
	goto fail;
	}
	memcpy(s->avctx_internal->extradata, avctx->extradata,
	avctx->extradata_size);
	s->avctx_internal->extradata_size = avctx->extradata_size;
	}

	s->parser = av_parser_init(AV_CODEC_ID_H264);
	if (!s->parser) {
	ret = AVERROR(ENOMEM);
	goto fail;
	}
	s->parser->flags \|= PARSER_FLAG_COMPLETE_FRAMES;

	s->qsv.iopattern = MFX_IOPATTERN_OUT_SYSTEM_MEMORY;

	return 0;
	fail:
	qsv_decode_close(avctx);
	return ret;
	}

	static int qsv_process_data(AVCodecContext avctx, AVFrame frame,
	int got_frame, AVPacket pkt)
	{
	QSVH264Context *s = avctx->priv_data;
	uint8_t *dummy_data;
	int dummy_size;
	int ret;

	/* we assume the packets are already split properly and want
	* just the codec parameters here */
	av_parser_parse2(s->parser, s->avctx_internal,
	&dummy_data, &dummy_size,
	pkt->data, pkt->size, pkt->pts, pkt->dts,
	pkt->pos);

	/* TODO: flush delayed frames on reinit */
	if (s->parser->format != s->orig_pix_fmt \|\|
	s->parser->coded_width != avctx->coded_width \|\|
	s->parser->coded_height != avctx->coded_height) {
	mfxSession session = NULL;

	enum AVPixelFormat pix_fmts[3] = { AV_PIX_FMT_QSV,
	AV_PIX_FMT_NONE,
	AV_PIX_FMT_NONE };
	enum AVPixelFormat qsv_format;

	qsv_format = ff_qsv_map_pixfmt(s->parser->format);
	if (qsv_format < 0) {
	av_log(avctx, AV_LOG_ERROR,
	"Only 8-bit YUV420 streams are supported.\n");
	ret = AVERROR(ENOSYS);
	goto reinit_fail;
	}

	s->orig_pix_fmt = s->parser->format;
	avctx->pix_fmt = pix_fmts[1] = qsv_format;
	avctx->width = s->parser->width;
	avctx->height = s->parser->height;
	avctx->coded_width = s->parser->coded_width;
	avctx->coded_height = s->parser->coded_height;
	avctx->level = s->avctx_internal->level;
	avctx->profile = s->avctx_internal->profile;

	ret = ff_get_format(avctx, pix_fmts);
	if (ret < 0)
	goto reinit_fail;

	avctx->pix_fmt = ret;

	if (avctx->hwaccel_context) {
	AVQSVContext *user_ctx = avctx->hwaccel_context;
	session = user_ctx->session;
	s->qsv.iopattern = user_ctx->iopattern;
	s->qsv.ext_buffers = user_ctx->ext_buffers;
	s->qsv.nb_ext_buffers = user_ctx->nb_ext_buffers;
	}

	ret = ff_qsv_decode_init(avctx, &s->qsv, session);
	if (ret < 0)
	goto reinit_fail;
	}

	return ff_qsv_decode(avctx, &s->qsv, frame, got_frame, &s->pkt_filtered);

	reinit_fail:
	s->orig_pix_fmt = s->parser->format = avctx->pix_fmt = AV_PIX_FMT_NONE;
	return ret;
	}

	static int qsv_decode_frame(AVCodecContext avctx, void data,
	int got_frame, AVPacket avpkt)
	{
	QSVH264Context *s = avctx->priv_data;
	AVFrame *frame = data;
	int ret;

	/* buffer the input packet */
	if (avpkt->size) {
	AVPacket input_ref = { 0 };

	if (av_fifo_space(s->packet_fifo) < sizeof(input_ref)) {
	ret = av_fifo_realloc2(s->packet_fifo,
	av_fifo_size(s->packet_fifo) + sizeof(input_ref));
	if (ret < 0)
	return ret;
	}

	ret = av_packet_ref(&input_ref, avpkt);
	if (ret < 0)
	return ret;
	av_fifo_generic_write(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
	}

	/* process buffered data */
	while (!*got_frame) {
	/* prepare the input data -- convert to Annex B if needed */
	if (s->pkt_filtered.size <= 0) {
	int size;

	/* no more data */
	if (av_fifo_size(s->packet_fifo) < sizeof(AVPacket))
	return avpkt->size ? avpkt->size : ff_qsv_decode(avctx, &s->qsv, frame, got_frame, avpkt);

	if (s->filtered_data != s->input_ref.data)
	av_freep(&s->filtered_data);
	s->filtered_data = NULL;
	av_packet_unref(&s->input_ref);

	av_fifo_generic_read(s->packet_fifo, &s->input_ref, sizeof(s->input_ref), NULL);
	ret = av_bitstream_filter_filter(s->bsf, avctx, NULL,
	&s->filtered_data, &size,
	s->input_ref.data, s->input_ref.size, 0);
	if (ret < 0) {
	s->filtered_data = s->input_ref.data;
	size = s->input_ref.size;
	}
	s->pkt_filtered = s->input_ref;
	s->pkt_filtered.data = s->filtered_data;
	s->pkt_filtered.size = size;
	}

	ret = qsv_process_data(avctx, frame, got_frame, &s->pkt_filtered);
	if (ret < 0)
	return ret;

	s->pkt_filtered.size -= ret;
	s->pkt_filtered.data += ret;
	}

	return avpkt->size;
	}

	static void qsv_decode_flush(AVCodecContext *avctx)
	{
	QSVH264Context *s = avctx->priv_data;

	qsv_clear_buffers(s);
	s->orig_pix_fmt = AV_PIX_FMT_NONE;
	}

	AVHWAccel ff_h264_qsv_hwaccel = {
	.name = "h264_qsv",
	.type = AVMEDIA_TYPE_VIDEO,
	.id = AV_CODEC_ID_H264,
	.pix_fmt = AV_PIX_FMT_QSV,
	};

	#define OFFSET(x) offsetof(QSVH264Context, x)
	#define VD AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_DECODING_PARAM
	static const AVOption options[] = {
	{ "async_depth", "Internal parallelization depth, the higher the value the higher the latency.", OFFSET(qsv.async_depth), AV_OPT_TYPE_INT, { .i64 = ASYNC_DEPTH_DEFAULT }, 0, INT_MAX, VD },
	{ NULL },
	};

	static const AVClass class = {
	.class_name = "h264_qsv",
	.item_name = av_default_item_name,
	.option = options,
	.version = LIBAVUTIL_VERSION_INT,
	};

	AVCodec ff_h264_qsv_decoder = {
	.name = "h264_qsv",
	.long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration)"),
	.priv_data_size = sizeof(QSVH264Context),
	.type = AVMEDIA_TYPE_VIDEO,
	.id = AV_CODEC_ID_H264,
	.init = qsv_decode_init,
	.decode = qsv_decode_frame,
	.flush = qsv_decode_flush,
	.close = qsv_decode_close,
	.capabilities = CODEC_CAP_DELAY,
	.priv_class = &class,
	};