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  1. /*
  2.  * Intel MediaSDK QSV based MPEG2 video decoder
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include <stdint.h>
  22. #include <string.h>
  23.  
  24. #include "libavutil/common.h"
  25. #include "libavutil/opt.h"
  26.  
  27. #include "avcodec.h"
  28. #include "qsvdec.h"
  29.  
  30. typedef struct QSVMPEG2Context {
  31.     AVClass *class;
  32.     QSVContext qsv;
  33. } QSVMPEG2Context;
  34.  
  35. static av_cold int qsv_decode_close(AVCodecContext *avctx)
  36. {
  37.     QSVMPEG2Context *s = avctx->priv_data;
  38.  
  39.     ff_qsv_decode_close(&s->qsv);
  40.  
  41.     return 0;
  42. }
  43.  
  44. static av_cold int qsv_decode_init(AVCodecContext *avctx)
  45. {
  46.     return 0;
  47. }
  48.  
  49. static int qsv_decode_frame(AVCodecContext *avctx, void *data,
  50.                             int *got_frame, AVPacket *avpkt)
  51. {
  52.     QSVMPEG2Context *s = avctx->priv_data;
  53.     AVFrame *frame    = data;
  54.  
  55.     return ff_qsv_decode(avctx, &s->qsv, frame, got_frame, avpkt);
  56. }
  57.  
  58. static void qsv_decode_flush(AVCodecContext *avctx)
  59. {
  60. }
  61.  
  62. AVHWAccel ff_mpeg2_qsv_hwaccel = {
  63.     .name           = "mpeg2_qsv",
  64.     .type           = AVMEDIA_TYPE_VIDEO,
  65.     .id             = AV_CODEC_ID_MPEG2VIDEO,
  66.     .pix_fmt        = AV_PIX_FMT_QSV,
  67. };
  68.  
  69. #define OFFSET(x) offsetof(QSVMPEG2Context, x)
  70. #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
  71. static const AVOption options[] = {
  72.     { "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 },
  73.     { NULL },
  74. };
  75.  
  76. static const AVClass class = {
  77.     .class_name = "mpeg2_qsv",
  78.     .item_name  = av_default_item_name,
  79.     .option     = options,
  80.     .version    = LIBAVUTIL_VERSION_INT,
  81. };
  82.  
  83. AVCodec ff_mpeg2_qsv_decoder = {
  84.     .name           = "mpeg2_qsv",
  85.     .long_name      = NULL_IF_CONFIG_SMALL("MPEG-2 video (Intel Quick Sync Video acceleration)"),
  86.     .priv_data_size = sizeof(QSVMPEG2Context),
  87.     .type           = AVMEDIA_TYPE_VIDEO,
  88.     .id             = AV_CODEC_ID_MPEG2VIDEO,
  89.     .init           = qsv_decode_init,
  90.     .decode         = qsv_decode_frame,
  91.     .flush          = qsv_decode_flush,
  92.     .close          = qsv_decode_close,
  93.     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
  94.     .priv_class     = &class,
  95. };
  96.