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/*****************************************************************************
* va_surface.c: libavcodec Generic Video Acceleration helpers
*****************************************************************************
* Copyright (C) 2009 Geoffroy Couprie
* Copyright (C) 2009 Laurent Aimar
* Copyright (C) 2015 Steve Lhomme
*
* Authors: Geoffroy Couprie <geal@videolan.org>
* Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
* Steve Lhomme <robux4@gmail.com>
*
* This program 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.
*
* This program 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 this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <vlc_common.h>
#include <vlc_codecs.h>
#include <vlc_codec.h>
#include <vlc_picture.h>
struct picture_sys_t {
void *dummy;
};
#include "va_surface_internal.h"
#include "avcodec.h"
struct vlc_va_surface_t {
atomic_uintptr_t refcount;
};
static void DestroyVideoDecoder(vlc_va_t *va, va_pool_t *va_pool)
{
for (unsigned i = 0; i < va_pool->surface_count; i++)
va_surface_Release(va_pool->surface[i]->va_surface);
va_pool->pf_destroy_surfaces(va);
va_pool->surface_count = 0;
}
/* */
int va_pool_SetupDecoder(vlc_va_t *va, va_pool_t *va_pool, const AVCodecContext *avctx, unsigned count,
int surface_width, int surface_height)
{
int err = VLC_ENOMEM;
unsigned i = va_pool->surface_count;
if ( va_pool->surface_count >= count &&
va_pool->surface_width == surface_width &&
va_pool->surface_height == surface_height )
{
msg_Dbg(va, "reusing surface pool");
err = VLC_SUCCESS;
goto done;
}
/* */
DestroyVideoDecoder(va, va_pool);
/* */
msg_Dbg(va, "va_pool_SetupDecoder id %d %dx%d count: %d", avctx->codec_id, avctx->coded_width, avctx->coded_height, count);
if (count > MAX_SURFACE_COUNT)
return VLC_EGENERIC;
/* FIXME transmit a video_format_t by VaSetup directly */
video_format_t fmt;
memset(&fmt, 0, sizeof(fmt));
fmt.i_width = surface_width;
fmt.i_height = surface_height;
fmt.i_frame_rate = avctx->framerate.num;
fmt.i_frame_rate_base = avctx->framerate.den;
err = va_pool->pf_create_decoder_surfaces(va, avctx->codec_id, &fmt, count);
if (err == VLC_SUCCESS)
{
va_pool->surface_width = surface_width;
va_pool->surface_height = surface_height;
}
done:
va_pool->surface_count = i;
if (err == VLC_SUCCESS)
va_pool->pf_setup_avcodec_ctx(va);
return err;
}
int va_pool_SetupSurfaces(vlc_va_t *va, va_pool_t *va_pool, unsigned count)
{
int err = VLC_ENOMEM;
unsigned i = va_pool->surface_count;
for (i = 0; i < count; i++) {
struct vlc_va_surface_t *p_surface = malloc(sizeof(*p_surface));
if (unlikely(p_surface==NULL))
goto done;
va_pool->surface[i] = va_pool->pf_new_surface_context(va, i);
if (unlikely(va_pool->surface[i]==NULL))
{
free(p_surface);
goto done;
}
va_pool->surface[i]->va_surface = p_surface;
atomic_init(&va_pool->surface[i]->va_surface->refcount, 1);
}
err = VLC_SUCCESS;
done:
va_pool->surface_count = i;
if (err == VLC_SUCCESS)
va_pool->pf_setup_avcodec_ctx(va);
return err;
}
static picture_context_t *GetSurface(va_pool_t *va_pool)
{
for (unsigned i = 0; i < va_pool->surface_count; i++) {
struct va_pic_context *surface = va_pool->surface[i];
uintptr_t expected = 1;
if (atomic_compare_exchange_strong(&surface->va_surface->refcount, &expected, 2))
{
picture_context_t *field = surface->s.copy(&surface->s);
/* the copy should have added an extra reference */
atomic_fetch_sub(&surface->va_surface->refcount, 1);
return field;
}
}
return NULL;
}
int va_pool_Get(va_pool_t *va_pool, picture_t *pic)
{
unsigned tries = (CLOCK_FREQ + VOUT_OUTMEM_SLEEP) / VOUT_OUTMEM_SLEEP;
picture_context_t *field;
if (va_pool->surface_count == 0)
return VLC_ENOITEM;
while ((field = GetSurface(va_pool)) == NULL)
{
if (--tries == 0)
return VLC_ENOITEM;
/* Pool empty. Wait for some time as in src/input/decoder.c.
* XXX: Both this and the core should use a semaphore or a CV. */
msleep(VOUT_OUTMEM_SLEEP);
}
pic->context = field;
return VLC_SUCCESS;
}
void va_surface_AddRef(vlc_va_surface_t *surface)
{
atomic_fetch_add(&surface->refcount, 1);
}
void va_surface_Release(vlc_va_surface_t *surface)
{
if (atomic_fetch_sub(&surface->refcount, 1) != 1)
return;
free(surface);
}
void va_pool_Close(vlc_va_t *va, va_pool_t *va_pool)
{
DestroyVideoDecoder(va, va_pool);
va_pool->pf_destroy_video_service(va);
if (va_pool->pf_destroy_device_manager)
va_pool->pf_destroy_device_manager(va);
va_pool->pf_destroy_device(va);
}
int va_pool_Open(vlc_va_t *va, va_pool_t *va_pool)
{
/* */
if (va_pool->pf_create_device(va)) {
msg_Err(va, "Failed to create device");
goto error;
}
msg_Dbg(va, "CreateDevice succeed");
if (va_pool->pf_create_device_manager &&
va_pool->pf_create_device_manager(va) != VLC_SUCCESS) {
msg_Err(va, "CreateDeviceManager failed");
goto error;
}
if (va_pool->pf_create_video_service(va)) {
msg_Err(va, "CreateVideoService failed");
goto error;
}
return VLC_SUCCESS;
error:
return VLC_EGENERIC;
}
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