ffmpeg/ffmpeg_vdpau.c

243 lines
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/*
* This file is part of FFmpeg.
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*
* FFmpeg is free software; you can redistribute it and/or
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* 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.
*
* FFmpeg is distributed in the hope that it will be useful,
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* 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 FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <vdpau/vdpau.h>
#include <vdpau/vdpau_x11.h>
#include <X11/Xlib.h>
#include "ffmpeg.h"
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#include "libavcodec/vdpau.h"
#include "libavutil/avassert.h"
#include "libavutil/buffer.h"
#include "libavutil/frame.h"
#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_vdpau.h"
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#include "libavutil/pixfmt.h"
typedef struct VDPAUContext {
AVBufferRef *hw_frames_ctx;
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AVFrame *tmp_frame;
} VDPAUContext;
typedef struct VDPAUHWDevicePriv {
VdpDeviceDestroy *device_destroy;
Display *dpy;
} VDPAUHWDevicePriv;
static void device_free(AVHWDeviceContext *ctx)
{
AVVDPAUDeviceContext *hwctx = ctx->hwctx;
VDPAUHWDevicePriv *priv = ctx->user_opaque;
if (priv->device_destroy)
priv->device_destroy(hwctx->device);
if (priv->dpy)
XCloseDisplay(priv->dpy);
av_freep(&priv);
}
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static void vdpau_uninit(AVCodecContext *s)
{
InputStream *ist = s->opaque;
VDPAUContext *ctx = ist->hwaccel_ctx;
ist->hwaccel_uninit = NULL;
ist->hwaccel_get_buffer = NULL;
ist->hwaccel_retrieve_data = NULL;
av_buffer_unref(&ctx->hw_frames_ctx);
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av_frame_free(&ctx->tmp_frame);
av_freep(&ist->hwaccel_ctx);
av_freep(&s->hwaccel_context);
}
static int vdpau_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
{
InputStream *ist = s->opaque;
VDPAUContext *ctx = ist->hwaccel_ctx;
return av_hwframe_get_buffer(ctx->hw_frames_ctx, frame, 0);
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}
static int vdpau_retrieve_data(AVCodecContext *s, AVFrame *frame)
{
InputStream *ist = s->opaque;
VDPAUContext *ctx = ist->hwaccel_ctx;
int ret;
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ret = av_hwframe_transfer_data(ctx->tmp_frame, frame, 0);
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if (ret < 0)
return ret;
ret = av_frame_copy_props(ctx->tmp_frame, frame);
if (ret < 0) {
av_frame_unref(ctx->tmp_frame);
return ret;
}
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av_frame_unref(frame);
av_frame_move_ref(frame, ctx->tmp_frame);
return 0;
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}
static int vdpau_alloc(AVCodecContext *s)
{
InputStream *ist = s->opaque;
int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
AVVDPAUContext *vdpau_ctx;
VDPAUContext *ctx;
const char *display, *vendor;
VdpStatus err;
int ret;
VdpDevice device;
VdpGetProcAddress *get_proc_address;
VdpGetInformationString *get_information_string;
VDPAUHWDevicePriv *device_priv = NULL;
AVBufferRef *device_ref = NULL;
AVHWDeviceContext *device_ctx;
AVVDPAUDeviceContext *device_hwctx;
AVHWFramesContext *frames_ctx;
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ctx = av_mallocz(sizeof(*ctx));
if (!ctx)
return AVERROR(ENOMEM);
device_priv = av_mallocz(sizeof(*device_priv));
if (!device_priv)
goto fail;
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ist->hwaccel_ctx = ctx;
ist->hwaccel_uninit = vdpau_uninit;
ist->hwaccel_get_buffer = vdpau_get_buffer;
ist->hwaccel_retrieve_data = vdpau_retrieve_data;
ctx->tmp_frame = av_frame_alloc();
if (!ctx->tmp_frame)
goto fail;
device_priv->dpy = XOpenDisplay(ist->hwaccel_device);
if (!device_priv->dpy) {
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av_log(NULL, loglevel, "Cannot open the X11 display %s.\n",
XDisplayName(ist->hwaccel_device));
goto fail;
}
display = XDisplayString(device_priv->dpy);
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err = vdp_device_create_x11(device_priv->dpy, XDefaultScreen(device_priv->dpy),
&device, &get_proc_address);
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if (err != VDP_STATUS_OK) {
av_log(NULL, loglevel, "VDPAU device creation on X11 display %s failed.\n",
display);
goto fail;
}
#define GET_CALLBACK(id, result) \
do { \
void *tmp; \
err = get_proc_address(device, id, &tmp); \
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if (err != VDP_STATUS_OK) { \
av_log(NULL, loglevel, "Error getting the " #id " callback.\n"); \
goto fail; \
} \
result = tmp; \
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} while (0)
GET_CALLBACK(VDP_FUNC_ID_GET_INFORMATION_STRING, get_information_string);
GET_CALLBACK(VDP_FUNC_ID_DEVICE_DESTROY, device_priv->device_destroy);
device_ref = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_VDPAU);
if (!device_ref)
goto fail;
device_ctx = (AVHWDeviceContext*)device_ref->data;
device_hwctx = device_ctx->hwctx;
device_ctx->user_opaque = device_priv;
device_ctx->free = device_free;
device_hwctx->device = device;
device_hwctx->get_proc_address = get_proc_address;
device_priv = NULL;
ret = av_hwdevice_ctx_init(device_ref);
if (ret < 0)
goto fail;
ctx->hw_frames_ctx = av_hwframe_ctx_alloc(device_ref);
if (!ctx->hw_frames_ctx)
goto fail;
av_buffer_unref(&device_ref);
frames_ctx = (AVHWFramesContext*)ctx->hw_frames_ctx->data;
frames_ctx->format = AV_PIX_FMT_VDPAU;
frames_ctx->sw_format = s->sw_pix_fmt;
frames_ctx->width = s->coded_width;
frames_ctx->height = s->coded_height;
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ret = av_hwframe_ctx_init(ctx->hw_frames_ctx);
if (ret < 0)
goto fail;
if (av_vdpau_bind_context(s, device, get_proc_address, 0))
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goto fail;
get_information_string(&vendor);
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av_log(NULL, AV_LOG_VERBOSE, "Using VDPAU -- %s -- on X11 display %s, "
"to decode input stream #%d:%d.\n", vendor,
display, ist->file_index, ist->st->index);
return 0;
fail:
av_log(NULL, loglevel, "VDPAU init failed for stream #%d:%d.\n",
ist->file_index, ist->st->index);
if (device_priv) {
if (device_priv->device_destroy)
device_priv->device_destroy(device);
if (device_priv->dpy)
XCloseDisplay(device_priv->dpy);
}
av_freep(&device_priv);
av_buffer_unref(&device_ref);
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vdpau_uninit(s);
return AVERROR(EINVAL);
}
int vdpau_init(AVCodecContext *s)
{
InputStream *ist = s->opaque;
if (!ist->hwaccel_ctx) {
int ret = vdpau_alloc(s);
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if (ret < 0)
return ret;
}
ist->hwaccel_get_buffer = vdpau_get_buffer;
ist->hwaccel_retrieve_data = vdpau_retrieve_data;
return 0;
}