| /* |
| * Intel MediaSDK QSV based MPEG-2 decoder |
| * |
| * 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 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; |
| } |
| |
| 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) { |
| 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 = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1 | AV_CODEC_CAP_AVOID_PROBING, |
| .priv_class = &class, |
| .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12, |
| AV_PIX_FMT_QSV, |
| AV_PIX_FMT_NONE }, |
| }; |