From bf52f773913cf74bdf0d2c8c2cb4473fa1b7801e Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Tue, 16 Jun 2015 18:22:11 +0200 Subject: lavc: add Intel libmfx-based MPEG2 decoder. --- libavcodec/qsvdec_mpeg2.c | 179 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 179 insertions(+) create mode 100644 libavcodec/qsvdec_mpeg2.c (limited to 'libavcodec/qsvdec_mpeg2.c') diff --git a/libavcodec/qsvdec_mpeg2.c b/libavcodec/qsvdec_mpeg2.c new file mode 100644 index 0000000000..dbe882bf74 --- /dev/null +++ b/libavcodec/qsvdec_mpeg2.c @@ -0,0 +1,179 @@ +/* + * Intel MediaSDK QSV based MPEG2 decoder + * + * copyright (c) 2015 Anton Khirnov + * + * 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 +#include + +#include + +#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 QSVMPEG2Context { + AVClass *class; + QSVContext qsv; + + AVFifoBuffer *packet_fifo; + + AVPacket input_ref; +} QSVMPEG2Context; + +static void qsv_clear_buffers(QSVMPEG2Context *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); + } + + av_packet_unref(&s->input_ref); +} + +static av_cold int qsv_decode_close(AVCodecContext *avctx) +{ + QSVMPEG2Context *s = avctx->priv_data; + + ff_qsv_decode_close(&s->qsv); + + qsv_clear_buffers(s); + + av_fifo_free(s->packet_fifo); + + return 0; +} + +static av_cold int qsv_decode_init(AVCodecContext *avctx) +{ + QSVMPEG2Context *s = avctx->priv_data; + int ret; + + s->packet_fifo = av_fifo_alloc(sizeof(AVPacket)); + if (!s->packet_fifo) { + ret = AVERROR(ENOMEM); + goto fail; + } + + s->qsv.iopattern = MFX_IOPATTERN_OUT_SYSTEM_MEMORY; + + return 0; +fail: + qsv_decode_close(avctx); + return ret; +} + +static int qsv_decode_frame(AVCodecContext *avctx, void *data, + int *got_frame, AVPacket *avpkt) +{ + QSVMPEG2Context *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->input_ref.size <= 0) { + /* no more data */ + if (av_fifo_size(s->packet_fifo) < sizeof(AVPacket)) + return avpkt->size ? avpkt->size : ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, avpkt); + + av_packet_unref(&s->input_ref); + av_fifo_generic_read(s->packet_fifo, &s->input_ref, sizeof(s->input_ref), NULL); + } + + ret = ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, &s->input_ref); + if (ret < 0) + return ret; + + s->input_ref.size -= ret; + s->input_ref.data += ret; + } + + return avpkt->size; +} + +static void qsv_decode_flush(AVCodecContext *avctx) +{ + QSVMPEG2Context *s = avctx->priv_data; + + qsv_clear_buffers(s); + ff_qsv_decode_flush(avctx, &s->qsv); +} + +AVHWAccel ff_mpeg2_qsv_hwaccel = { + .name = "mpeg2_qsv", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MPEG2VIDEO, + .pix_fmt = AV_PIX_FMT_QSV, +}; + +#define OFFSET(x) offsetof(QSVMPEG2Context, 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 = "mpeg2_qsv", + .item_name = av_default_item_name, + .option = options, + .version = LIBAVUTIL_VERSION_INT, +}; + +AVCodec ff_mpeg2_qsv_decoder = { + .name = "mpeg2_qsv", + .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video (Intel Quick Sync Video acceleration)"), + .priv_data_size = sizeof(QSVMPEG2Context), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_MPEG2VIDEO, + .init = qsv_decode_init, + .decode = qsv_decode_frame, + .flush = qsv_decode_flush, + .close = qsv_decode_close, + .capabilities = CODEC_CAP_DELAY, + .priv_class = &class, +}; -- cgit v1.2.3