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mpv/video/decode/lavc_dr1.c
wm4 5accc5e7c1 vdpau: split off decoder parts, use "new" libavcodec vdpau hwaccel API
Move the decoder parts from vo_vdpau.c to a new file vdpau_old.c. This
file is named so because because it's written against the "old"
libavcodec vdpau pseudo-decoder (e.g. "h264_vdpau").

Add support for the "new" libavcodec vdpau support. This was recently
added and replaces the "old" vdpau parts. (In fact, Libav is about to
deprecate and remove the "old" API without deprecation grace period,
so we have to support it now. Moreover, there will probably be no Libav
release which supports both, so the transition is even less smooth than
we could hope, and we have to support both the old and new API.)

Whether the old or new API is used is checked by a configure test: if
the new API is found, it is used, otherwise the old API is assumed.

Some details might be handled differently. Especially display preemption
is a bit problematic with the "new" libavcodec vdpau support: it wants
to keep a pointer to a specific vdpau API function (which can be driver
specific, because preemption might switch drivers). Also, surface IDs
are now directly stored in AVFrames (and mp_images), so they can't be
forced to VDP_INVALID_HANDLE on preemption. (This changes even with
older libavcodec versions, because mp_image always uses the newer
representation to make vo_vdpau.c simpler.)

Decoder initialization in the new code tries to deal with codec
profiles, while the old code always uses the highest profile per codec.

Surface allocation changes. Since the decoder won't call config() in
vo_vdpau.c on video size change anymore, we allow allocating surfaces
of arbitrary size instead of locking it to what the VO was configured.
The non-hwdec code also has slightly different allocation behavior now.

Enabling the old vdpau special decoders via e.g. --vd=lavc:h264_vdpau
doesn't work anymore (a warning suggesting the --hwdec option is
printed instead).
2013-07-28 19:25:07 +02:00

293 lines
7.7 KiB
C

/*
* Various utilities for command line tools
* Copyright (c) 2000-2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* NOTE: this file is for compatibility with older versions of
* libavcodec, before AVFrame reference counting was introduced.
* It is not compiled if libavcodec is new enough.
*/
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>
#include <libavcodec/avcodec.h>
#include <libavutil/avassert.h>
#include <libavutil/mathematics.h>
#include <libavutil/imgutils.h>
#include <libavutil/pixdesc.h>
#include <libavutil/common.h>
#include "config.h"
#include "lavc.h"
#if HAVE_PTHREADS
#include <pthread.h>
static pthread_mutex_t pool_mutex = PTHREAD_MUTEX_INITIALIZER;
#define pool_lock() pthread_mutex_lock(&pool_mutex)
#define pool_unlock() pthread_mutex_unlock(&pool_mutex)
#else
#define pool_lock() 0
#define pool_unlock() 0
#endif
typedef struct FramePool {
struct FrameBuffer *list;
// used to deal with frames that live past the time the pool should live
int dead;
int refcount; // number of allocated buffers (not in list)
} FramePool;
typedef struct FrameBuffer {
uint8_t *base[4];
uint8_t *data[4];
int linesize[4];
int h, w;
int pix_fmt;
int used_by_decoder, needed_by_decoder;
int refcount;
struct FramePool *pool;
struct FrameBuffer *next;
} FrameBuffer;
static int alloc_buffer(FramePool *pool, AVCodecContext *s)
{
const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[s->pix_fmt];
FrameBuffer *buf;
int i, ret;
int pixel_size;
int h_chroma_shift, v_chroma_shift;
int edge = 32; // XXX should be avcodec_get_edge_width(), but that fails on svq1
int w = s->width, h = s->height;
if (!desc)
return AVERROR(EINVAL);
pixel_size = desc->comp[0].step_minus1 + 1;
buf = av_mallocz(sizeof(*buf));
if (!buf)
return AVERROR(ENOMEM);
avcodec_align_dimensions(s, &w, &h);
if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
w += 2*edge;
h += 2*edge;
}
if ((ret = av_image_alloc(buf->base, buf->linesize, w, h,
s->pix_fmt, 32)) < 0) {
av_freep(&buf);
av_log(s, AV_LOG_ERROR, "alloc_buffer: av_image_alloc() failed\n");
return ret;
}
/* XXX this shouldn't be needed, but some tests break without this line
* those decoders are buggy and need to be fixed.
* the following tests fail:
* cdgraphics, ansi, aasc, fraps-v1, qtrle-1bit
*/
memset(buf->base[0], 128, ret);
avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
const int h_shift = i==0 ? 0 : h_chroma_shift;
const int v_shift = i==0 ? 0 : v_chroma_shift;
if ((s->flags & CODEC_FLAG_EMU_EDGE) || !buf->linesize[i] || !buf->base[i])
buf->data[i] = buf->base[i];
else
buf->data[i] = buf->base[i] +
FFALIGN((buf->linesize[i]*edge >> v_shift) +
(pixel_size*edge >> h_shift), 32);
}
buf->w = s->width;
buf->h = s->height;
buf->pix_fmt = s->pix_fmt;
buf->pool = pool;
buf->next = pool->list;
pool->list = buf;
return 0;
}
int mp_codec_get_buffer(AVCodecContext *s, AVFrame *frame)
{
sh_video_t *sh = s->opaque;
struct lavc_ctx *ctx = sh->context;
if (!ctx->dr1_buffer_pool) {
ctx->dr1_buffer_pool = av_mallocz(sizeof(*ctx->dr1_buffer_pool));
if (!ctx->dr1_buffer_pool)
return AVERROR(ENOMEM);
}
FramePool *pool = ctx->dr1_buffer_pool;
FrameBuffer *buf;
int ret, i;
if(av_image_check_size(s->width, s->height, 0, s) || s->pix_fmt<0) {
av_log(s, AV_LOG_ERROR, "codec_get_buffer: image parameters invalid\n");
return -1;
}
pool_lock();
if (!pool->list && (ret = alloc_buffer(pool, s)) < 0) {
pool_unlock();
return ret;
}
buf = pool->list;
if (buf->w != s->width || buf->h != s->height || buf->pix_fmt != s->pix_fmt) {
pool->list = buf->next;
av_freep(&buf->base[0]);
av_free(buf);
if ((ret = alloc_buffer(pool, s)) < 0) {
pool_unlock();
return ret;
}
buf = pool->list;
}
av_assert0(!buf->refcount);
buf->refcount++;
pool->list = buf->next;
pool->refcount++;
pool_unlock();
frame->opaque = buf;
frame->type = FF_BUFFER_TYPE_USER;
frame->extended_data = frame->data;
buf->used_by_decoder = buf->needed_by_decoder = 1;
if (frame->buffer_hints & FF_BUFFER_HINTS_VALID) {
buf->needed_by_decoder =
(frame->buffer_hints & FF_BUFFER_HINTS_PRESERVE) ||
(frame->buffer_hints & FF_BUFFER_HINTS_REUSABLE);
} else {
buf->needed_by_decoder = !!frame->reference;
}
for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
frame->base[i] = buf->base[i]; // XXX h264.c uses base though it shouldn't
frame->data[i] = buf->data[i];
frame->linesize[i] = buf->linesize[i];
}
return 0;
}
void mp_buffer_ref(struct FrameBuffer *buf)
{
pool_lock();
buf->refcount++;
pool_unlock();
}
void mp_buffer_unref(struct FrameBuffer *buf)
{
FramePool *pool = buf->pool;
bool pool_dead;
pool_lock();
av_assert0(pool->refcount > 0);
av_assert0(buf->refcount > 0);
buf->refcount--;
if (!buf->refcount) {
FrameBuffer *tmp;
for(tmp= pool->list; tmp; tmp= tmp->next)
av_assert1(tmp != buf);
buf->next = pool->list;
pool->list = buf;
pool->refcount--;
}
pool_dead = pool->dead && pool->refcount == 0;
pool_unlock();
if (pool_dead)
mp_buffer_pool_free(&pool);
}
bool mp_buffer_is_unique(struct FrameBuffer *buf)
{
int refcount;
pool_lock();
refcount = buf->refcount;
// Decoder has a reference, but doesn't want to use it. (ffmpeg has no good
// way of transferring frame ownership to the user.)
if (buf->used_by_decoder && !buf->needed_by_decoder)
refcount--;
pool_unlock();
return refcount == 1;
}
void mp_codec_release_buffer(AVCodecContext *s, AVFrame *frame)
{
FrameBuffer *buf = frame->opaque;
int i;
if(frame->type!=FF_BUFFER_TYPE_USER) {
avcodec_default_release_buffer(s, frame);
return;
}
buf->used_by_decoder = buf->needed_by_decoder = 0;
for (i = 0; i < FF_ARRAY_ELEMS(frame->data); i++)
frame->data[i] = NULL;
mp_buffer_unref(buf);
}
void mp_buffer_pool_free(struct FramePool **p_pool)
{
struct FramePool *pool = *p_pool;
if (!pool)
return;
pool_lock();
while (pool->list) {
FrameBuffer *buf = pool->list;
pool->list = buf->next;
av_assert0(buf->refcount == 0);
av_freep(&buf->base[0]);
av_free(buf);
}
pool->dead = 1;
if (pool->refcount == 0)
av_free(pool);
pool_unlock();
*p_pool = NULL;
}