hwcontext: add a VDPAU implementation

doc/APIchanges

@@ -17,6 +17,8 @@ API changes, most recent first:
   xxxxxxx buffer.h - Add av_buffer_pool_init2().
   xxxxxxx hwcontext.h - Add a new installed header hwcontext.h with a new API
                         for handling hwaccel frames.
+  xxxxxxx hwcontext_vdpau.h - Add a new installed header hwcontext_vdpau.h with
+                              VDPAU-specific hwcontext definitions.
 
 2016-xx-xx - xxxxxxx - lavf 57.3.0 - avformat.h
   Add AVFormatContext.opaque, io_open and io_close, allowing custom IO

libavutil/Makefile

@@ -24,6 +24,7 @@ HEADERS = adler32.h                                                     \
           frame.h                                                       \
           hmac.h                                                        \
           hwcontext.h                                                   \
+          hwcontext_vdpau.h                                             \
           imgutils.h                                                    \
           intfloat.h                                                    \
           intreadwrite.h                                                \
@@ -105,6 +106,7 @@ OBJS = adler32.o                                                        \
        xtea.o                                                           \
 
 OBJS-$(CONFIG_LZO)                      += lzo.o
+OBJS-$(CONFIG_VDPAU)                    += hwcontext_vdpau.o
 
 OBJS += $(COMPAT_OBJS:%=../compat/%)
 

libavutil/hwcontext.c

@@ -29,6 +29,9 @@
 #include "pixfmt.h"
 
 static const HWContextType *hw_table[] = {
+#if CONFIG_VDPAU
+    &ff_hwcontext_type_vdpau,
+#endif
     NULL,
 };
 

libavutil/hwcontext_internal.h

@@ -86,4 +86,6 @@ struct AVHWFramesInternal {
     AVBufferPool *pool_internal;
 };
 
+extern const HWContextType ff_hwcontext_type_vdpau;
+
 #endif /* AVUTIL_HWCONTEXT_INTERNAL_H */

libavutil/hwcontext_vdpau.c

+/*
+ * 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 <vdpau/vdpau.h>
+
+#include "buffer.h"
+#include "common.h"
+#include "hwcontext.h"
+#include "hwcontext_internal.h"
+#include "hwcontext_vdpau.h"
+#include "mem.h"
+#include "pixfmt.h"
+#include "pixdesc.h"
+
+typedef struct VDPAUDeviceContext {
+    VdpVideoSurfaceQueryGetPutBitsYCbCrCapabilities *get_transfer_caps;
+    VdpVideoSurfaceGetBitsYCbCr                     *get_data;
+    VdpVideoSurfacePutBitsYCbCr                     *put_data;
+    VdpVideoSurfaceCreate                           *surf_create;
+    VdpVideoSurfaceDestroy                          *surf_destroy;
+
+    enum AVPixelFormat *pix_fmts[3];
+    int              nb_pix_fmts[3];
+} VDPAUDeviceContext;
+
+typedef struct VDPAUFramesContext {
+    VdpVideoSurfaceGetBitsYCbCr *get_data;
+    VdpVideoSurfacePutBitsYCbCr *put_data;
+    VdpChromaType chroma_type;
+    int chroma_idx;
+
+    const enum AVPixelFormat *pix_fmts;
+    int                       nb_pix_fmts;
+} VDPAUFramesContext;
+
+typedef struct VDPAUPixFmtMap {
+    VdpYCbCrFormat vdpau_fmt;
+    enum AVPixelFormat pix_fmt;
+} VDPAUPixFmtMap;
+
+static const VDPAUPixFmtMap pix_fmts_420[] = {
+    { VDP_YCBCR_FORMAT_NV12, AV_PIX_FMT_NV12    },
+    { VDP_YCBCR_FORMAT_YV12, AV_PIX_FMT_YUV420P },
+    { 0,                     AV_PIX_FMT_NONE,   },
+};
+
+static const VDPAUPixFmtMap pix_fmts_422[] = {
+    { VDP_YCBCR_FORMAT_NV12, AV_PIX_FMT_NV16    },
+    { VDP_YCBCR_FORMAT_YV12, AV_PIX_FMT_YUV422P },
+    { VDP_YCBCR_FORMAT_UYVY, AV_PIX_FMT_UYVY422 },
+    { VDP_YCBCR_FORMAT_YUYV, AV_PIX_FMT_YUYV422 },
+    { 0,                     AV_PIX_FMT_NONE,   },
+};
+
+static const VDPAUPixFmtMap pix_fmts_444[] = {
+    { VDP_YCBCR_FORMAT_YV12, AV_PIX_FMT_YUV444P },
+    { 0,                     AV_PIX_FMT_NONE,   },
+};
+
+static const struct {
+    VdpChromaType chroma_type;
+    const VDPAUPixFmtMap *map;
+} vdpau_pix_fmts[] = {
+    { VDP_CHROMA_TYPE_420, pix_fmts_420 },
+    { VDP_CHROMA_TYPE_422, pix_fmts_422 },
+    { VDP_CHROMA_TYPE_444, pix_fmts_444 },
+};
+
+static int count_pixfmts(const VDPAUPixFmtMap *map)
+{
+    int count = 0;
+    while (map->pix_fmt != AV_PIX_FMT_NONE) {
+        map++;
+        count++;
+    }
+    return count;
+}
+
+static int vdpau_init_pixmfts(AVHWDeviceContext *ctx)
+{
+    AVVDPAUDeviceContext *hwctx = ctx->hwctx;
+    VDPAUDeviceContext    *priv = ctx->internal->priv;
+    int i;
+
+    for (i = 0; i < FF_ARRAY_ELEMS(priv->pix_fmts); i++) {
+        const VDPAUPixFmtMap *map = vdpau_pix_fmts[i].map;
+        int nb_pix_fmts;
+
+        nb_pix_fmts = count_pixfmts(map);
+        priv->pix_fmts[i] = av_malloc_array(nb_pix_fmts + 1, sizeof(*priv->pix_fmts[i]));
+        if (!priv->pix_fmts[i])
+            return AVERROR(ENOMEM);
+
+        nb_pix_fmts = 0;
+        while (map->pix_fmt != AV_PIX_FMT_NONE) {
+            VdpBool supported;
+            VdpStatus err = priv->get_transfer_caps(hwctx->device, vdpau_pix_fmts[i].chroma_type,
+                                                    map->vdpau_fmt, &supported);
+            if (err == VDP_STATUS_OK && supported)
+                priv->pix_fmts[i][nb_pix_fmts++] = map->pix_fmt;
+            map++;
+        }
+        priv->pix_fmts[i][nb_pix_fmts++] = AV_PIX_FMT_NONE;
+        priv->nb_pix_fmts[i]             = nb_pix_fmts;
+    }
+
+    return 0;
+}
+
+static int vdpau_device_init(AVHWDeviceContext *ctx)
+{
+    AVVDPAUDeviceContext *hwctx = ctx->hwctx;
+    VDPAUDeviceContext   *priv  = ctx->internal->priv;
+    VdpStatus             err;
+    int                   ret;
+
+#define GET_CALLBACK(id, result)                                                \
+do {                                                                            \
+    void *tmp;                                                                  \
+    err = hwctx->get_proc_address(hwctx->device, id, &tmp);                     \
+    if (err != VDP_STATUS_OK) {                                                 \
+        av_log(ctx, AV_LOG_ERROR, "Error getting the " #id " callback.\n");     \
+        return AVERROR_UNKNOWN;                                                 \
+    }                                                                           \
+    priv->result = tmp;                                                         \
+} while (0)
+
+    GET_CALLBACK(VDP_FUNC_ID_VIDEO_SURFACE_QUERY_GET_PUT_BITS_Y_CB_CR_CAPABILITIES,
+                 get_transfer_caps);
+    GET_CALLBACK(VDP_FUNC_ID_VIDEO_SURFACE_GET_BITS_Y_CB_CR, get_data);
+    GET_CALLBACK(VDP_FUNC_ID_VIDEO_SURFACE_PUT_BITS_Y_CB_CR, put_data);
+    GET_CALLBACK(VDP_FUNC_ID_VIDEO_SURFACE_CREATE,           surf_create);
+    GET_CALLBACK(VDP_FUNC_ID_VIDEO_SURFACE_DESTROY,          surf_destroy);
+
+    ret = vdpau_init_pixmfts(ctx);
+    if (ret < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Error querying the supported pixel formats\n");
+        return ret;
+    }
+
+    return 0;
+}
+
+static void vdpau_device_uninit(AVHWDeviceContext *ctx)
+{
+    VDPAUDeviceContext *priv = ctx->internal->priv;
+    int i;
+
+    for (i = 0; i < FF_ARRAY_ELEMS(priv->pix_fmts); i++)
+        av_freep(&priv->pix_fmts[i]);
+}
+
+static void vdpau_buffer_free(void *opaque, uint8_t *data)
+{
+    AVHWFramesContext          *ctx = opaque;
+    VDPAUDeviceContext *device_priv = ctx->device_ctx->internal->priv;
+    VdpVideoSurface            surf = (VdpVideoSurface)(uintptr_t)data;
+
+    device_priv->surf_destroy(surf);
+}
+
+static AVBufferRef *vdpau_pool_alloc(void *opaque, int size)
+{
+    AVHWFramesContext             *ctx = opaque;
+    VDPAUFramesContext           *priv = ctx->internal->priv;
+    AVVDPAUDeviceContext *device_hwctx = ctx->device_ctx->hwctx;
+    VDPAUDeviceContext    *device_priv = ctx->device_ctx->internal->priv;
+
+    AVBufferRef *ret;
+    VdpVideoSurface surf;
+    VdpStatus err;
+
+    err = device_priv->surf_create(device_hwctx->device, priv->chroma_type,
+                                   ctx->width, ctx->height, &surf);
+    if (err != VDP_STATUS_OK) {
+        av_log(ctx, AV_LOG_ERROR, "Error allocating a VDPAU video surface\n");
+        return NULL;
+    }
+
+    ret = av_buffer_create((uint8_t*)(uintptr_t)surf, sizeof(surf),
+                           vdpau_buffer_free, ctx, AV_BUFFER_FLAG_READONLY);
+    if (!ret) {
+        device_priv->surf_destroy(surf);
+        return NULL;
+    }
+
+    return ret;
+}
+
+static int vdpau_frames_init(AVHWFramesContext *ctx)
+{
+    VDPAUDeviceContext *device_priv = ctx->device_ctx->internal->priv;
+    VDPAUFramesContext        *priv = ctx->internal->priv;
+
+    int i;
+
+    switch (ctx->sw_format) {
+    case AV_PIX_FMT_YUV420P: priv->chroma_type = VDP_CHROMA_TYPE_420; break;
+    case AV_PIX_FMT_YUV422P: priv->chroma_type = VDP_CHROMA_TYPE_422; break;
+    case AV_PIX_FMT_YUV444P: priv->chroma_type = VDP_CHROMA_TYPE_444; break;
+    default:
+        av_log(ctx, AV_LOG_ERROR, "Unsupported data layout: %s\n",
+               av_get_pix_fmt_name(ctx->sw_format));
+        return AVERROR(ENOSYS);
+    }
+
+    for (i = 0; i < FF_ARRAY_ELEMS(vdpau_pix_fmts); i++) {
+        if (vdpau_pix_fmts[i].chroma_type == priv->chroma_type) {
+            priv->chroma_idx  = i;
+            priv->pix_fmts    = device_priv->pix_fmts[i];
+            priv->nb_pix_fmts = device_priv->nb_pix_fmts[i];
+            break;
+        }
+    }
+    if (!priv->pix_fmts) {
+        av_log(ctx, AV_LOG_ERROR, "Unsupported chroma type: %d\n", priv->chroma_type);
+        return AVERROR(ENOSYS);
+    }
+
+    if (!ctx->pool) {
+        ctx->internal->pool_internal = av_buffer_pool_init2(sizeof(VdpVideoSurface), ctx,
+                                                            vdpau_pool_alloc, NULL);
+        if (!ctx->internal->pool_internal)
+            return AVERROR(ENOMEM);
+    }
+
+    priv->get_data = device_priv->get_data;
+    priv->put_data = device_priv->put_data;
+
+    return 0;
+}
+
+static int vdpau_get_buffer(AVHWFramesContext *ctx, AVFrame *frame)
+{
+    frame->buf[0] = av_buffer_pool_get(ctx->pool);
+    if (!frame->buf[0])
+        return AVERROR(ENOMEM);
+
+    frame->data[3] = frame->buf[0]->data;
+    frame->format  = AV_PIX_FMT_VDPAU;
+    frame->width   = ctx->width;
+    frame->height  = ctx->height;
+
+    return 0;
+}
+
+static int vdpau_transfer_get_formats(AVHWFramesContext *ctx,
+                                      enum AVHWFrameTransferDirection dir,
+                                      enum AVPixelFormat **formats)
+{
+    VDPAUFramesContext *priv  = ctx->internal->priv;
+
+    enum AVPixelFormat *fmts;
+
+    if (priv->nb_pix_fmts == 1) {
+        av_log(ctx, AV_LOG_ERROR,
+               "No target formats are supported for this chroma type\n");
+        return AVERROR(ENOSYS);
+    }
+
+    fmts = av_malloc_array(priv->nb_pix_fmts, sizeof(*fmts));
+    if (!fmts)
+        return AVERROR(ENOMEM);
+
+    memcpy(fmts, priv->pix_fmts, sizeof(*fmts) * (priv->nb_pix_fmts));
+    *formats = fmts;
+
+    return 0;
+}
+
+static int vdpau_transfer_data_from(AVHWFramesContext *ctx, AVFrame *dst,
+                                    const AVFrame *src)
+{
+    VDPAUFramesContext *priv = ctx->internal->priv;
+    VdpVideoSurface     surf = (VdpVideoSurface)(uintptr_t)src->data[3];
+
+    void *data[3];
+    uint32_t linesize[3];
+
+    const VDPAUPixFmtMap *map;
+    VdpYCbCrFormat vdpau_format;
+    VdpStatus err;
+    int i;
+
+    for (i = 0; i< FF_ARRAY_ELEMS(data) && dst->data[i]; i++) {
+        data[i] = dst->data[i];
+        if (dst->linesize[i] < 0 || (uint64_t)dst->linesize > UINT32_MAX) {
+            av_log(ctx, AV_LOG_ERROR,
+                   "The linesize %d cannot be represented as uint32\n",
+                   dst->linesize[i]);
+            return AVERROR(ERANGE);
+        }
+        linesize[i] = dst->linesize[i];
+    }
+
+    map = vdpau_pix_fmts[priv->chroma_idx].map;
+    for (i = 0; map[i].pix_fmt != AV_PIX_FMT_NONE; i++) {
+        if (map[i].pix_fmt == dst->format) {
+            vdpau_format = map[i].vdpau_fmt;
+            break;
+        }
+    }
+    if (map[i].pix_fmt == AV_PIX_FMT_NONE) {
+        av_log(ctx, AV_LOG_ERROR,
+               "Unsupported target pixel format: %s\n",
+               av_get_pix_fmt_name(dst->format));
+        return AVERROR(EINVAL);
+    }
+
+    if (vdpau_format == VDP_YCBCR_FORMAT_YV12)
+        FFSWAP(void*, data[1], data[2]);
+
+    err = priv->get_data(surf, vdpau_format, data, linesize);
+    if (err != VDP_STATUS_OK) {
+        av_log(ctx, AV_LOG_ERROR, "Error retrieving the data from a VDPAU surface\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    return 0;
+}
+
+static int vdpau_transfer_data_to(AVHWFramesContext *ctx, AVFrame *dst,
+                                  const AVFrame *src)
+{
+    VDPAUFramesContext *priv = ctx->internal->priv;
+    VdpVideoSurface     surf = (VdpVideoSurface)(uintptr_t)dst->data[3];
+
+    const void *data[3];
+    uint32_t linesize[3];
+
+    const VDPAUPixFmtMap *map;
+    VdpYCbCrFormat vdpau_format;
+    VdpStatus err;
+    int i;
+
+    for (i = 0; i< FF_ARRAY_ELEMS(data) && src->data[i]; i++) {
+        data[i] = src->data[i];
+        if (src->linesize[i] < 0 || (uint64_t)src->linesize > UINT32_MAX) {
+            av_log(ctx, AV_LOG_ERROR,
+                   "The linesize %d cannot be represented as uint32\n",
+                   src->linesize[i]);
+            return AVERROR(ERANGE);
+        }
+        linesize[i] = src->linesize[i];
+    }
+
+    map = vdpau_pix_fmts[priv->chroma_idx].map;
+    for (i = 0; map[i].pix_fmt != AV_PIX_FMT_NONE; i++) {
+        if (map[i].pix_fmt == src->format) {
+            vdpau_format = map[i].vdpau_fmt;
+            break;
+        }
+    }
+    if (map[i].pix_fmt == AV_PIX_FMT_NONE) {
+        av_log(ctx, AV_LOG_ERROR,
+               "Unsupported source pixel format: %s\n",
+               av_get_pix_fmt_name(src->format));
+        return AVERROR(EINVAL);
+    }
+
+    if (vdpau_format == VDP_YCBCR_FORMAT_YV12)
+        FFSWAP(const void*, data[1], data[2]);
+
+    err = priv->put_data(surf, vdpau_format, data, linesize);
+    if (err != VDP_STATUS_OK) {
+        av_log(ctx, AV_LOG_ERROR, "Error uploading the data to a VDPAU surface\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    return 0;
+}
+
+const HWContextType ff_hwcontext_type_vdpau = {
+    .type                 = AV_HWDEVICE_TYPE_VDPAU,
+    .name                 = "VDPAU",
+
+    .device_hwctx_size    = sizeof(AVVDPAUDeviceContext),
+    .device_priv_size     = sizeof(VDPAUDeviceContext),
+    .frames_priv_size     = sizeof(VDPAUFramesContext),
+
+    .device_init          = vdpau_device_init,
+    .device_uninit        = vdpau_device_uninit,
+    .frames_init          = vdpau_frames_init,
+    .frames_get_buffer    = vdpau_get_buffer,
+    .transfer_get_formats = vdpau_transfer_get_formats,
+    .transfer_data_to     = vdpau_transfer_data_to,
+    .transfer_data_from   = vdpau_transfer_data_from,
+
+    .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU, AV_PIX_FMT_NONE },
+};

libavutil/hwcontext_vdpau.h

+/*
+ * 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
+ */
+
+#ifndef AVUTIL_HWCONTEXT_VDPAU_H
+#define AVUTIL_HWCONTEXT_VDPAU_H
+
+#include <vdpau/vdpau.h>
+
+/**
+ * @file
+ * An API-specific header for AV_HWDEVICE_TYPE_VDPAU.
+ *
+ * This API supports dynamic frame pools. AVHWFramesContext.pool must return
+ * AVBufferRefs whose data pointer is a VdpVideoSurface.
+ */
+
+/**
+ * This struct is allocated as AVHWDeviceContext.hwctx
+ */
+typedef struct AVVDPAUDeviceContext {
+    VdpDevice          device;
+    VdpGetProcAddress *get_proc_address;
+} AVVDPAUDeviceContext;
+
+/**
+ * AVHWFramesContext.hwctx is currently not used
+ */
+
+#endif /* AVUTIL_HWCONTEXT_VDPAU_H */