libavcodec/qsvdec_h2645.c

   1 /*
   2  * Intel MediaSDK QSV based H.264 / HEVC decoder
   3  *
   4  * copyright (c) 2013 Luca Barbato
   5  * copyright (c) 2015 Anton Khirnov
   6  *
   7  * This file is part of Libav.
   8  *
   9  * Libav is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * Libav is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with Libav; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24
  25 #include <stdint.h>
  26 #include <string.h>
  27
  28 #include <mfx/mfxvideo.h>
  29
  30 #include "libavutil/common.h"
  31 #include "libavutil/fifo.h"
  32 #include "libavutil/opt.h"
  33
  34 #include "avcodec.h"
  35 #include "internal.h"
  36 #include "qsv_internal.h"
  37 #include "qsvdec.h"
  38 #include "qsv.h"
  39
  40 enum LoadPlugin {
  41     LOAD_PLUGIN_NONE,
  42     LOAD_PLUGIN_HEVC_SW,
  43 };
  44
  45 typedef struct QSVH2645Context {
  46     AVClass *class;
  47     QSVContext qsv;
  48
  49     int load_plugin;
  50
  51     // the filter for converting to Annex B
  52     AVBitStreamFilterContext *bsf;
  53
  54     AVFifoBuffer *packet_fifo;
  55
  56     AVPacket input_ref;
  57     AVPacket pkt_filtered;
  58     uint8_t *filtered_data;
  59 } QSVH2645Context;
  60
  61 static void qsv_clear_buffers(QSVH2645Context *s)
  62 {
  63     AVPacket pkt;
  64     while (av_fifo_size(s->packet_fifo) >= sizeof(pkt)) {
  65         av_fifo_generic_read(s->packet_fifo, &pkt, sizeof(pkt), NULL);
  66         av_packet_unref(&pkt);
  67     }
  68
  69     if (s->filtered_data != s->input_ref.data)
  70         av_freep(&s->filtered_data);
  71     s->filtered_data = NULL;
  72     av_packet_unref(&s->input_ref);
  73 }
  74
  75 static av_cold int qsv_decode_close(AVCodecContext *avctx)
  76 {
  77     QSVH2645Context *s = avctx->priv_data;
  78
  79     ff_qsv_decode_close(&s->qsv);
  80
  81     qsv_clear_buffers(s);
  82
  83     av_fifo_free(s->packet_fifo);
  84
  85     av_bitstream_filter_close(s->bsf);
  86
  87     return 0;
  88 }
  89
  90 static av_cold int qsv_decode_init(AVCodecContext *avctx)
  91 {
  92     QSVH2645Context *s = avctx->priv_data;
  93     int ret;
  94
  95     if (avctx->codec_id == AV_CODEC_ID_HEVC && s->load_plugin != LOAD_PLUGIN_NONE) {
  96         static const char *uid_hevcenc_sw = "15dd936825ad475ea34e35f3f54217a6";
  97
  98         if (s->qsv.load_plugins[0]) {
  99             av_log(avctx, AV_LOG_WARNING,
 100                    "load_plugins is not empty, but load_plugin is not set to 'none'."
 101                    "The load_plugin value will be ignored.\n");
 102         } else {
 103             av_freep(&s->qsv.load_plugins);
 104             s->qsv.load_plugins = av_strdup(uid_hevcenc_sw);
 105             if (!s->qsv.load_plugins)
 106                 return AVERROR(ENOMEM);
 107         }
 108     }
 109
 110     s->packet_fifo = av_fifo_alloc(sizeof(AVPacket));
 111     if (!s->packet_fifo) {
 112         ret = AVERROR(ENOMEM);
 113         goto fail;
 114     }
 115
 116     if (avctx->codec_id == AV_CODEC_ID_H264)
 117         s->bsf = av_bitstream_filter_init("h264_mp4toannexb");
 118     else
 119         s->bsf = av_bitstream_filter_init("hevc_mp4toannexb");
 120     if (!s->bsf) {
 121         ret = AVERROR(ENOMEM);
 122         goto fail;
 123     }
 124
 125     s->qsv.iopattern = MFX_IOPATTERN_OUT_SYSTEM_MEMORY;
 126
 127     return 0;
 128 fail:
 129     qsv_decode_close(avctx);
 130     return ret;
 131 }
 132
 133 static int qsv_decode_frame(AVCodecContext *avctx, void *data,
 134                             int *got_frame, AVPacket *avpkt)
 135 {
 136     QSVH2645Context *s = avctx->priv_data;
 137     AVFrame *frame    = data;
 138     int ret;
 139
 140     /* buffer the input packet */
 141     if (avpkt->size) {
 142         AVPacket input_ref = { 0 };
 143
 144         if (av_fifo_space(s->packet_fifo) < sizeof(input_ref)) {
 145             ret = av_fifo_realloc2(s->packet_fifo,
 146                                    av_fifo_size(s->packet_fifo) + sizeof(input_ref));
 147             if (ret < 0)
 148                 return ret;
 149         }
 150
 151         ret = av_packet_ref(&input_ref, avpkt);
 152         if (ret < 0)
 153             return ret;
 154         av_fifo_generic_write(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
 155     }
 156
 157     /* process buffered data */
 158     while (!*got_frame) {
 159         /* prepare the input data -- convert to Annex B if needed */
 160         if (s->pkt_filtered.size <= 0) {
 161             int size;
 162
 163             /* no more data */
 164             if (av_fifo_size(s->packet_fifo) < sizeof(AVPacket))
 165                 return avpkt->size ? avpkt->size : ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, avpkt);
 166
 167             if (s->filtered_data != s->input_ref.data)
 168                 av_freep(&s->filtered_data);
 169             s->filtered_data = NULL;
 170             av_packet_unref(&s->input_ref);
 171
 172             av_fifo_generic_read(s->packet_fifo, &s->input_ref, sizeof(s->input_ref), NULL);
 173             ret = av_bitstream_filter_filter(s->bsf, avctx, NULL,
 174                                              &s->filtered_data, &size,
 175                                              s->input_ref.data, s->input_ref.size, 0);
 176             if (ret < 0) {
 177                 s->filtered_data = s->input_ref.data;
 178                 size             = s->input_ref.size;
 179             }
 180             s->pkt_filtered      = s->input_ref;
 181             s->pkt_filtered.data = s->filtered_data;
 182             s->pkt_filtered.size = size;
 183         }
 184
 185         ret = ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, &s->pkt_filtered);
 186         if (ret < 0)
 187             return ret;
 188
 189         s->pkt_filtered.size -= ret;
 190         s->pkt_filtered.data += ret;
 191     }
 192
 193     return avpkt->size;
 194 }
 195
 196 static void qsv_decode_flush(AVCodecContext *avctx)
 197 {
 198     QSVH2645Context *s = avctx->priv_data;
 199
 200     qsv_clear_buffers(s);
 201     ff_qsv_decode_flush(avctx, &s->qsv);
 202 }
 203
 204 #define OFFSET(x) offsetof(QSVH2645Context, x)
 205 #define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
 206
 207 #if CONFIG_HEVC_QSV_DECODER
 208 AVHWAccel ff_hevc_qsv_hwaccel = {
 209     .name           = "hevc_qsv",
 210     .type           = AVMEDIA_TYPE_VIDEO,
 211     .id             = AV_CODEC_ID_HEVC,
 212     .pix_fmt        = AV_PIX_FMT_QSV,
 213 };
 214
 215 static const AVOption hevc_options[] = {
 216     { "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 },
 217
 218     { "load_plugin", "A user plugin to load in an internal session", OFFSET(load_plugin), AV_OPT_TYPE_INT, { .i64 = LOAD_PLUGIN_HEVC_SW }, LOAD_PLUGIN_NONE, LOAD_PLUGIN_HEVC_SW, VD, "load_plugin" },
 219     { "none",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_NONE },    0, 0, VD, "load_plugin" },
 220     { "hevc_sw",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_SW }, 0, 0, VD, "load_plugin" },
 221
 222     { "load_plugins", "A :-separate list of hexadecimal plugin UIDs to load in an internal session",
 223         OFFSET(qsv.load_plugins), AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VD },
 224     { NULL },
 225 };
 226
 227 static const AVClass hevc_class = {
 228     .class_name = "hevc_qsv",
 229     .item_name  = av_default_item_name,
 230     .option     = hevc_options,
 231     .version    = LIBAVUTIL_VERSION_INT,
 232 };
 233
 234 AVCodec ff_hevc_qsv_decoder = {
 235     .name           = "hevc_qsv",
 236     .long_name      = NULL_IF_CONFIG_SMALL("HEVC (Intel Quick Sync Video acceleration)"),
 237     .priv_data_size = sizeof(QSVH2645Context),
 238     .type           = AVMEDIA_TYPE_VIDEO,
 239     .id             = AV_CODEC_ID_HEVC,
 240     .init           = qsv_decode_init,
 241     .decode         = qsv_decode_frame,
 242     .flush          = qsv_decode_flush,
 243     .close          = qsv_decode_close,
 244     .capabilities   = CODEC_CAP_DELAY | CODEC_CAP_DR1,
 245     .priv_class     = &hevc_class,
 246     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
 247                                                     AV_PIX_FMT_QSV,
 248                                                     AV_PIX_FMT_NONE },
 249 };
 250 #endif
 251
 252 #if CONFIG_H264_QSV_DECODER
 253 AVHWAccel ff_h264_qsv_hwaccel = {
 254     .name           = "h264_qsv",
 255     .type           = AVMEDIA_TYPE_VIDEO,
 256     .id             = AV_CODEC_ID_H264,
 257     .pix_fmt        = AV_PIX_FMT_QSV,
 258 };
 259
 260 static const AVOption options[] = {
 261     { "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 },
 262     { NULL },
 263 };
 264
 265 static const AVClass class = {
 266     .class_name = "h264_qsv",
 267     .item_name  = av_default_item_name,
 268     .option     = options,
 269     .version    = LIBAVUTIL_VERSION_INT,
 270 };
 271
 272 AVCodec ff_h264_qsv_decoder = {
 273     .name           = "h264_qsv",
 274     .long_name      = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration)"),
 275     .priv_data_size = sizeof(QSVH2645Context),
 276     .type           = AVMEDIA_TYPE_VIDEO,
 277     .id             = AV_CODEC_ID_H264,
 278     .init           = qsv_decode_init,
 279     .decode         = qsv_decode_frame,
 280     .flush          = qsv_decode_flush,
 281     .close          = qsv_decode_close,
 282     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
 283     .priv_class     = &class,
 284     .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
 285                                                     AV_PIX_FMT_QSV,
 286                                                     AV_PIX_FMT_NONE },
 287 };
 288 #endif