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ffmpeg/libavcodec/qsvdec.c

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/*
* Intel MediaSDK QSV codec-independent code
*
* copyright (c) 2013 Luca Barbato
* copyright (c) 2015 Anton Khirnov <anton@khirnov.net>
*
* 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 <string.h>
#include <sys/types.h>
#include <mfx/mfxvideo.h>
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "libavutil/log.h"
#include "libavutil/pixfmt.h"
#include "libavutil/time.h"
#include "avcodec.h"
#include "internal.h"
#include "qsv.h"
#include "qsv_internal.h"
#include "qsvdec.h"
int ff_qsv_map_pixfmt(enum AVPixelFormat format)
{
switch (format) {
case AV_PIX_FMT_YUV420P:
case AV_PIX_FMT_YUVJ420P:
return AV_PIX_FMT_NV12;
default:
return AVERROR(ENOSYS);
}
}
static int qsv_init_session(AVCodecContext *avctx, QSVContext *q, mfxSession session)
{
if (!session) {
if (!q->internal_session) {
int ret = ff_qsv_init_internal_session(avctx, &q->internal_session,
q->load_plugins);
if (ret < 0)
return ret;
}
q->session = q->internal_session;
} else {
q->session = session;
}
/* make sure the decoder is uninitialized */
MFXVideoDECODE_Close(q->session);
return 0;
}
static int qsv_decode_init(AVCodecContext *avctx, QSVContext *q, mfxSession session)
{
mfxVideoParam param = { { 0 } };
int ret;
if (!q->async_fifo) {
q->async_fifo = av_fifo_alloc((1 + q->async_depth) *
(sizeof(mfxSyncPoint) + sizeof(QSVFrame*)));
if (!q->async_fifo)
return AVERROR(ENOMEM);
}
ret = qsv_init_session(avctx, q, session);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error initializing an MFX session\n");
return ret;
}
ret = ff_qsv_codec_id_to_mfx(avctx->codec_id);
if (ret < 0)
return ret;
param.mfx.CodecId = ret;
param.mfx.CodecProfile = avctx->profile;
param.mfx.CodecLevel = avctx->level;
param.mfx.FrameInfo.BitDepthLuma = 8;
param.mfx.FrameInfo.BitDepthChroma = 8;
param.mfx.FrameInfo.Shift = 0;
param.mfx.FrameInfo.FourCC = MFX_FOURCC_NV12;
param.mfx.FrameInfo.Width = avctx->coded_width;
param.mfx.FrameInfo.Height = avctx->coded_height;
param.mfx.FrameInfo.ChromaFormat = MFX_CHROMAFORMAT_YUV420;
param.IOPattern = q->iopattern;
param.AsyncDepth = q->async_depth;
param.ExtParam = q->ext_buffers;
param.NumExtParam = q->nb_ext_buffers;
ret = MFXVideoDECODE_Init(q->session, &param);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Error initializing the MFX video decoder\n");
return ff_qsv_error(ret);
}
return 0;
}
static int alloc_frame(AVCodecContext *avctx, QSVFrame *frame)
{
int ret;
ret = ff_get_buffer(avctx, frame->frame, AV_GET_BUFFER_FLAG_REF);
if (ret < 0)
return ret;
if (frame->frame->format == AV_PIX_FMT_QSV) {
frame->surface = (mfxFrameSurface1*)frame->frame->data[3];
} else {
frame->surface_internal.Info.BitDepthLuma = 8;
frame->surface_internal.Info.BitDepthChroma = 8;
frame->surface_internal.Info.FourCC = MFX_FOURCC_NV12;
frame->surface_internal.Info.Width = avctx->coded_width;
frame->surface_internal.Info.Height = avctx->coded_height;
frame->surface_internal.Info.ChromaFormat = MFX_CHROMAFORMAT_YUV420;
frame->surface_internal.Data.PitchLow = frame->frame->linesize[0];
frame->surface_internal.Data.Y = frame->frame->data[0];
frame->surface_internal.Data.UV = frame->frame->data[1];
frame->surface = &frame->surface_internal;
}
return 0;
}
static void qsv_clear_unused_frames(QSVContext *q)
{
QSVFrame *cur = q->work_frames;
while (cur) {
if (cur->surface && !cur->surface->Data.Locked && !cur->queued) {
cur->surface = NULL;
av_frame_unref(cur->frame);
}
cur = cur->next;
}
}
static int get_surface(AVCodecContext *avctx, QSVContext *q, mfxFrameSurface1 **surf)
{
QSVFrame *frame, **last;
int ret;
qsv_clear_unused_frames(q);
frame = q->work_frames;
last = &q->work_frames;
while (frame) {
if (!frame->surface) {
ret = alloc_frame(avctx, frame);
if (ret < 0)
return ret;
*surf = frame->surface;
return 0;
}
last = &frame->next;
frame = frame->next;
}
frame = av_mallocz(sizeof(*frame));
if (!frame)
return AVERROR(ENOMEM);
frame->frame = av_frame_alloc();
if (!frame->frame) {
av_freep(&frame);
return AVERROR(ENOMEM);
}
*last = frame;
ret = alloc_frame(avctx, frame);
if (ret < 0)
return ret;
*surf = frame->surface;
return 0;
}
static QSVFrame *find_frame(QSVContext *q, mfxFrameSurface1 *surf)
{
QSVFrame *cur = q->work_frames;
while (cur) {
if (surf == cur->surface)
return cur;
cur = cur->next;
}
return NULL;
}
static int qsv_decode(AVCodecContext *avctx, QSVContext *q,
AVFrame *frame, int *got_frame,
AVPacket *avpkt)
{
QSVFrame *out_frame;
mfxFrameSurface1 *insurf;
mfxFrameSurface1 *outsurf;
mfxSyncPoint sync;
mfxBitstream bs = { { { 0 } } };
int ret;
if (avpkt->size) {
bs.Data = avpkt->data;
bs.DataLength = avpkt->size;
bs.MaxLength = bs.DataLength;
bs.TimeStamp = avpkt->pts;
}
do {
ret = get_surface(avctx, q, &insurf);
if (ret < 0)
return ret;
ret = MFXVideoDECODE_DecodeFrameAsync(q->session, avpkt->size ? &bs : NULL,
insurf, &outsurf, &sync);
if (ret == MFX_WRN_DEVICE_BUSY)
av_usleep(1);
} while (ret == MFX_WRN_DEVICE_BUSY || ret == MFX_ERR_MORE_SURFACE);
if (ret != MFX_ERR_NONE &&
ret != MFX_ERR_MORE_DATA &&
ret != MFX_WRN_VIDEO_PARAM_CHANGED &&
ret != MFX_ERR_MORE_SURFACE) {
av_log(avctx, AV_LOG_ERROR, "Error during QSV decoding.\n");
return ff_qsv_error(ret);
}
/* make sure we do not enter an infinite loop if the SDK
* did not consume any data and did not return anything */
if (!sync && !bs.DataOffset) {
av_log(avctx, AV_LOG_WARNING, "A decode call did not consume any data\n");
bs.DataOffset = avpkt->size;
}
if (sync) {
QSVFrame *out_frame = find_frame(q, outsurf);
if (!out_frame) {
av_log(avctx, AV_LOG_ERROR,
"The returned surface does not correspond to any frame\n");
return AVERROR_BUG;
}
out_frame->queued = 1;
av_fifo_generic_write(q->async_fifo, &out_frame, sizeof(out_frame), NULL);
av_fifo_generic_write(q->async_fifo, &sync, sizeof(sync), NULL);
}
if (!av_fifo_space(q->async_fifo) ||
(!avpkt->size && av_fifo_size(q->async_fifo))) {
AVFrame *src_frame;
av_fifo_generic_read(q->async_fifo, &out_frame, sizeof(out_frame), NULL);
av_fifo_generic_read(q->async_fifo, &sync, sizeof(sync), NULL);
out_frame->queued = 0;
do {
ret = MFXVideoCORE_SyncOperation(q->session, sync, 1000);
} while (ret == MFX_WRN_IN_EXECUTION);
src_frame = out_frame->frame;
ret = av_frame_ref(frame, src_frame);
if (ret < 0)
return ret;
outsurf = out_frame->surface;
frame->pkt_pts = frame->pts = outsurf->Data.TimeStamp;
frame->repeat_pict =
outsurf->Info.PicStruct & MFX_PICSTRUCT_FRAME_TRIPLING ? 4 :
outsurf->Info.PicStruct & MFX_PICSTRUCT_FRAME_DOUBLING ? 2 :
outsurf->Info.PicStruct & MFX_PICSTRUCT_FIELD_REPEATED ? 1 : 0;
frame->top_field_first =
outsurf->Info.PicStruct & MFX_PICSTRUCT_FIELD_TFF;
frame->interlaced_frame =
!(outsurf->Info.PicStruct & MFX_PICSTRUCT_PROGRESSIVE);
*got_frame = 1;
}
return bs.DataOffset;
}
int ff_qsv_decode_close(QSVContext *q)
{
QSVFrame *cur = q->work_frames;
if (q->session)
MFXVideoDECODE_Close(q->session);
while (cur) {
q->work_frames = cur->next;
av_frame_free(&cur->frame);
av_freep(&cur);
cur = q->work_frames;
}
av_fifo_free(q->async_fifo);
q->async_fifo = NULL;
av_parser_close(q->parser);
avcodec_free_context(&q->avctx_internal);
if (q->internal_session)
MFXClose(q->internal_session);
return 0;
}
int ff_qsv_process_data(AVCodecContext *avctx, QSVContext *q,
AVFrame *frame, int *got_frame, AVPacket *pkt)
{
uint8_t *dummy_data;
int dummy_size;
int ret;
if (!q->avctx_internal) {
q->avctx_internal = avcodec_alloc_context3(NULL);
if (!q->avctx_internal)
return AVERROR(ENOMEM);
if (avctx->extradata) {
q->avctx_internal->extradata = av_mallocz(avctx->extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
if (!q->avctx_internal->extradata)
return AVERROR(ENOMEM);
memcpy(q->avctx_internal->extradata, avctx->extradata,
avctx->extradata_size);
q->avctx_internal->extradata_size = avctx->extradata_size;
}
q->parser = av_parser_init(avctx->codec_id);
if (!q->parser)
return AVERROR(ENOMEM);
q->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES;
q->orig_pix_fmt = AV_PIX_FMT_NONE;
}
if (!pkt->size)
return qsv_decode(avctx, q, frame, got_frame, pkt);
/* we assume the packets are already split properly and want
* just the codec parameters here */
av_parser_parse2(q->parser, q->avctx_internal,
&dummy_data, &dummy_size,
pkt->data, pkt->size, pkt->pts, pkt->dts,
pkt->pos);
/* TODO: flush delayed frames on reinit */
if (q->parser->format != q->orig_pix_fmt ||
q->parser->coded_width != avctx->coded_width ||
q->parser->coded_height != avctx->coded_height) {
mfxSession session = NULL;
enum AVPixelFormat pix_fmts[3] = { AV_PIX_FMT_QSV,
AV_PIX_FMT_NONE,
AV_PIX_FMT_NONE };
enum AVPixelFormat qsv_format;
qsv_format = ff_qsv_map_pixfmt(q->parser->format);
if (qsv_format < 0) {
av_log(avctx, AV_LOG_ERROR,
"Only 8-bit YUV420 streams are supported.\n");
ret = AVERROR(ENOSYS);
goto reinit_fail;
}
q->orig_pix_fmt = q->parser->format;
avctx->pix_fmt = pix_fmts[1] = qsv_format;
avctx->width = q->parser->width;
avctx->height = q->parser->height;
avctx->coded_width = q->parser->coded_width;
avctx->coded_height = q->parser->coded_height;
avctx->level = q->avctx_internal->level;
avctx->profile = q->avctx_internal->profile;
ret = ff_get_format(avctx, pix_fmts);
if (ret < 0)
goto reinit_fail;
avctx->pix_fmt = ret;
if (avctx->hwaccel_context) {
AVQSVContext *user_ctx = avctx->hwaccel_context;
session = user_ctx->session;
q->iopattern = user_ctx->iopattern;
q->ext_buffers = user_ctx->ext_buffers;
q->nb_ext_buffers = user_ctx->nb_ext_buffers;
}
ret = qsv_decode_init(avctx, q, session);
if (ret < 0)
goto reinit_fail;
}
return qsv_decode(avctx, q, frame, got_frame, pkt);
reinit_fail:
q->orig_pix_fmt = q->parser->format = avctx->pix_fmt = AV_PIX_FMT_NONE;
return ret;
}
void ff_qsv_decode_flush(AVCodecContext *avctx, QSVContext *q)
{
q->orig_pix_fmt = AV_PIX_FMT_NONE;
}
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