qsvdec: split off some code that will be shared with the encoder

1 files changed, 115 insertions, 0 deletions

diff --git a/libavcodec/qsv.c b/libavcodec/qsv.c
new file mode 100644
index 0000000000..bd9e18d43e
--- /dev/null
+++ b/libavcodec/qsv.c
@@ -0,0 +1,115 @@
+/*
+ * Intel MediaSDK QSV encoder/decoder shared code
+ *
+ * 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 <mfx/mfxvideo.h>
+
+#include "libavutil/error.h"
+
+#include "avcodec.h"
+#include "qsv_internal.h"
+
+int ff_qsv_codec_id_to_mfx(enum AVCodecID codec_id)
+{
+    switch (codec_id) {
+    case AV_CODEC_ID_H264:
+        return MFX_CODEC_AVC;
+    case AV_CODEC_ID_MPEG1VIDEO:
+    case AV_CODEC_ID_MPEG2VIDEO:
+        return MFX_CODEC_MPEG2;
+    case AV_CODEC_ID_VC1:
+        return MFX_CODEC_VC1;
+    default:
+        break;
+    }
+
+    return AVERROR(ENOSYS);
+}
+
+int ff_qsv_error(int mfx_err)
+{
+    switch (mfx_err) {
+    case MFX_ERR_NONE:
+        return 0;
+    case MFX_ERR_MEMORY_ALLOC:
+    case MFX_ERR_NOT_ENOUGH_BUFFER:
+        return AVERROR(ENOMEM);
+    case MFX_ERR_INVALID_HANDLE:
+        return AVERROR(EINVAL);
+    case MFX_ERR_DEVICE_FAILED:
+    case MFX_ERR_DEVICE_LOST:
+    case MFX_ERR_LOCK_MEMORY:
+        return AVERROR(EIO);
+    case MFX_ERR_NULL_PTR:
+    case MFX_ERR_UNDEFINED_BEHAVIOR:
+    case MFX_ERR_NOT_INITIALIZED:
+        return AVERROR_BUG;
+    case MFX_ERR_UNSUPPORTED:
+    case MFX_ERR_NOT_FOUND:
+        return AVERROR(ENOSYS);
+    case MFX_ERR_MORE_DATA:
+    case MFX_ERR_MORE_SURFACE:
+    case MFX_ERR_MORE_BITSTREAM:
+        return AVERROR(EAGAIN);
+    case MFX_ERR_INCOMPATIBLE_VIDEO_PARAM:
+    case MFX_ERR_INVALID_VIDEO_PARAM:
+        return AVERROR(EINVAL);
+    case MFX_ERR_ABORTED:
+    case MFX_ERR_UNKNOWN:
+    default:
+        return AVERROR_UNKNOWN;
+    }
+}
+
+int ff_qsv_init_internal_session(AVCodecContext *avctx, mfxSession *session)
+{
+    mfxIMPL impl   = MFX_IMPL_AUTO_ANY;
+    mfxVersion ver = { { QSV_VERSION_MINOR, QSV_VERSION_MAJOR } };
+
+    const char *desc;
+    int ret;
+
+    ret = MFXInit(impl, &ver, session);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Error initializing an internal MFX session\n");
+        return ff_qsv_error(ret);
+    }
+
+    MFXQueryIMPL(*session, &impl);
+
+    switch (MFX_IMPL_BASETYPE(impl)) {
+    case MFX_IMPL_SOFTWARE:
+        desc = "software";
+        break;
+    case MFX_IMPL_HARDWARE:
+    case MFX_IMPL_HARDWARE2:
+    case MFX_IMPL_HARDWARE3:
+    case MFX_IMPL_HARDWARE4:
+        desc = "hardware accelerated";
+        break;
+    default:
+        desc = "unknown";
+    }
+
+    av_log(avctx, AV_LOG_VERBOSE,
+           "Initialized an internal MFX session using %s implementation\n",
+           desc);
+
+    return 0;
+}