lavc: add Intel libmfx-based HEVC decoder.

1 files changed, 282 insertions, 0 deletions

diff --git a/libavcodec/qsvdec_h2645.c b/libavcodec/qsvdec_h2645.c
new file mode 100644
index 0000000000..99bce94639
--- /dev/null
+++ b/libavcodec/qsvdec_h2645.c
@@ -0,0 +1,282 @@
+/*
+ * Intel MediaSDK QSV based H.264 / HEVC decoder
+ *
+ * copyright (c) 2013 Luca Barbato
+ * 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 <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"
+
+enum LoadPlugin {
+    LOAD_PLUGIN_NONE,
+    LOAD_PLUGIN_HEVC_SW,
+};
+
+typedef struct QSVH2645Context {
+    AVClass *class;
+    QSVContext qsv;
+
+    int load_plugin;
+
+    // the filter for converting to Annex B
+    AVBitStreamFilterContext *bsf;
+
+    AVFifoBuffer *packet_fifo;
+
+    AVPacket input_ref;
+    AVPacket pkt_filtered;
+    uint8_t *filtered_data;
+} QSVH2645Context;
+
+static void qsv_clear_buffers(QSVH2645Context *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)
+{
+    QSVH2645Context *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);
+
+    return 0;
+}
+
+static av_cold int qsv_decode_init(AVCodecContext *avctx)
+{
+    QSVH2645Context *s = avctx->priv_data;
+    int ret;
+
+    if (avctx->codec_id == AV_CODEC_ID_HEVC && s->load_plugin != LOAD_PLUGIN_NONE) {
+        static const char *uid_hevcenc_sw = "15dd936825ad475ea34e35f3f54217a6";
+
+        if (s->qsv.load_plugins[0]) {
+            av_log(avctx, AV_LOG_WARNING,
+                   "load_plugins is not empty, but load_plugin is not set to 'none'."
+                   "The load_plugin value will be ignored.\n");
+        } else {
+            av_freep(&s->qsv.load_plugins);
+            s->qsv.load_plugins = av_strdup(uid_hevcenc_sw);
+            if (!s->qsv.load_plugins)
+                return AVERROR(ENOMEM);
+        }
+    }
+
+    s->packet_fifo = av_fifo_alloc(sizeof(AVPacket));
+    if (!s->packet_fifo) {
+        ret = AVERROR(ENOMEM);
+        goto fail;
+    }
+
+    if (avctx->codec_id == AV_CODEC_ID_H264)
+        s->bsf = av_bitstream_filter_init("h264_mp4toannexb");
+    else
+        s->bsf = av_bitstream_filter_init("hevc_mp4toannexb");
+    if (!s->bsf) {
+        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)
+{
+    QSVH2645Context *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_process_data(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 = ff_qsv_process_data(avctx, &s->qsv, 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)
+{
+    QSVH2645Context *s = avctx->priv_data;
+
+    qsv_clear_buffers(s);
+    ff_qsv_decode_flush(avctx, &s->qsv);
+}
+
+#define OFFSET(x) offsetof(QSVH2645Context, x)
+#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
+
+#if CONFIG_HEVC_QSV_DECODER
+AVHWAccel ff_hevc_qsv_hwaccel = {
+    .name           = "hevc_qsv",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_HEVC,
+    .pix_fmt        = AV_PIX_FMT_QSV,
+};
+
+static const AVOption hevc_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 },
+
+    { "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" },
+    { "none",     NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_NONE },    0, 0, VD, "load_plugin" },
+    { "hevc_sw",  NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_SW }, 0, 0, VD, "load_plugin" },
+
+    { "load_plugins", "A :-separate list of hexadecimal plugin UIDs to load in an internal session",
+        OFFSET(qsv.load_plugins), AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VD },
+    { NULL },
+};
+
+static const AVClass hevc_class = {
+    .class_name = "hevc_qsv",
+    .item_name  = av_default_item_name,
+    .option     = hevc_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVCodec ff_hevc_qsv_decoder = {
+    .name           = "hevc_qsv",
+    .long_name      = NULL_IF_CONFIG_SMALL("HEVC (Intel Quick Sync Video acceleration)"),
+    .priv_data_size = sizeof(QSVH2645Context),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_HEVC,
+    .init           = qsv_decode_init,
+    .decode         = qsv_decode_frame,
+    .flush          = qsv_decode_flush,
+    .close          = qsv_decode_close,
+    .capabilities   = CODEC_CAP_DELAY,
+    .priv_class     = &hevc_class,
+};
+#endif
+
+#if CONFIG_H264_QSV_DECODER
+AVHWAccel ff_h264_qsv_hwaccel = {
+    .name           = "h264_qsv",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_H264,
+    .pix_fmt        = AV_PIX_FMT_QSV,
+};
+
+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(QSVH2645Context),
+    .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,
+};
+#endif