ffmpeg/libavcodec/qsvdec_h2645.c

307 lines
9.3 KiB
C

/*
* Intel MediaSDK QSV based H.264 / HEVC decoder
*
* copyright (c) 2013 Luca Barbato
* copyright (c) 2015 Anton Khirnov
*
* 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
*/
#include <stdint.h>
#include <string.h>
#include <mfx/mfxvideo.h>
#include "libavutil/common.h"
#include "libavutil/fifo.h"
#include "libavutil/opt.h"
#include "avcodec.h"
#include "internal.h"
#include "qsvdec.h"
enum LoadPlugin {
LOAD_PLUGIN_NONE,
LOAD_PLUGIN_HEVC_SW,
};
typedef struct QSVH2645Context {
AVClass *class;
QSVContext qsv;
int load_plugin;
// the filter for converting to Annex B
AVBSFContext *bsf;
AVFifoBuffer *packet_fifo;
AVPacket pkt_filtered;
} QSVH2645Context;
static void qsv_clear_buffers(QSVH2645Context *s)
{
AVPacket pkt;
while (av_fifo_size(s->packet_fifo) >= sizeof(pkt)) {
av_fifo_generic_read(s->packet_fifo, &pkt, sizeof(pkt), NULL);
av_packet_unref(&pkt);
}
av_bsf_free(&s->bsf);
av_packet_unref(&s->pkt_filtered);
}
static av_cold int qsv_decode_close(AVCodecContext *avctx)
{
QSVH2645Context *s = avctx->priv_data;
ff_qsv_decode_close(&s->qsv);
qsv_clear_buffers(s);
av_fifo_free(s->packet_fifo);
return 0;
}
static av_cold int qsv_decode_init(AVCodecContext *avctx)
{
QSVH2645Context *s = avctx->priv_data;
int ret;
if (avctx->codec_id == AV_CODEC_ID_HEVC && s->load_plugin != LOAD_PLUGIN_NONE) {
static const char *uid_hevcenc_sw = "15dd936825ad475ea34e35f3f54217a6";
if (s->qsv.load_plugins[0]) {
av_log(avctx, AV_LOG_WARNING,
"load_plugins is not empty, but load_plugin is not set to 'none'."
"The load_plugin value will be ignored.\n");
} else {
av_freep(&s->qsv.load_plugins);
s->qsv.load_plugins = av_strdup(uid_hevcenc_sw);
if (!s->qsv.load_plugins)
return AVERROR(ENOMEM);
}
}
s->packet_fifo = av_fifo_alloc(sizeof(AVPacket));
if (!s->packet_fifo) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (avctx->codec_id == AV_CODEC_ID_H264) {
//regarding ticks_per_frame description, should be 2 for h.264:
avctx->ticks_per_frame = 2;
}
return 0;
fail:
qsv_decode_close(avctx);
return ret;
}
static int qsv_init_bsf(AVCodecContext *avctx, QSVH2645Context *s)
{
const char *filter_name = avctx->codec_id == AV_CODEC_ID_HEVC ?
"hevc_mp4toannexb" : "h264_mp4toannexb";
const AVBitStreamFilter *filter;
int ret;
if (s->bsf)
return 0;
filter = av_bsf_get_by_name(filter_name);
if (!filter)
return AVERROR_BUG;
ret = av_bsf_alloc(filter, &s->bsf);
if (ret < 0)
return ret;
ret = avcodec_parameters_from_context(s->bsf->par_in, avctx);
if (ret < 0)
return ret;
s->bsf->time_base_in = avctx->time_base;
ret = av_bsf_init(s->bsf);
if (ret < 0)
return ret;
return ret;
}
static int qsv_decode_frame(AVCodecContext *avctx, void *data,
int *got_frame, AVPacket *avpkt)
{
QSVH2645Context *s = avctx->priv_data;
AVFrame *frame = data;
int ret;
/* make sure the bitstream filter is initialized */
ret = qsv_init_bsf(avctx, s);
if (ret < 0)
return ret;
/* buffer the input packet */
if (avpkt->size) {
AVPacket input_ref = { 0 };
if (av_fifo_space(s->packet_fifo) < sizeof(input_ref)) {
ret = av_fifo_realloc2(s->packet_fifo,
av_fifo_size(s->packet_fifo) + sizeof(input_ref));
if (ret < 0)
return ret;
}
ret = av_packet_ref(&input_ref, avpkt);
if (ret < 0)
return ret;
av_fifo_generic_write(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
}
/* process buffered data */
while (!*got_frame) {
/* prepare the input data -- convert to Annex B if needed */
if (s->pkt_filtered.size <= 0) {
AVPacket input_ref;
/* no more data */
if (av_fifo_size(s->packet_fifo) < sizeof(AVPacket))
return avpkt->size ? avpkt->size : ff_qsv_decode(avctx, &s->qsv, frame, got_frame, avpkt);
av_packet_unref(&s->pkt_filtered);
av_fifo_generic_read(s->packet_fifo, &input_ref, sizeof(input_ref), NULL);
ret = av_bsf_send_packet(s->bsf, &input_ref);
if (ret < 0) {
av_packet_unref(&input_ref);
return ret;
}
ret = av_bsf_receive_packet(s->bsf, &s->pkt_filtered);
if (ret < 0)
av_packet_move_ref(&s->pkt_filtered, &input_ref);
else
av_packet_unref(&input_ref);
}
ret = ff_qsv_decode(avctx, &s->qsv, frame, got_frame, &s->pkt_filtered);
if (ret < 0)
return ret;
s->pkt_filtered.size -= ret;
s->pkt_filtered.data += ret;
}
return avpkt->size;
}
static void qsv_decode_flush(AVCodecContext *avctx)
{
QSVH2645Context *s = avctx->priv_data;
ff_qsv_decode_reset(avctx, &s->qsv);
}
#define OFFSET(x) offsetof(QSVH2645Context, x)
#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
#if CONFIG_HEVC_QSV_DECODER
AVHWAccel ff_hevc_qsv_hwaccel = {
.name = "hevc_qsv",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.pix_fmt = AV_PIX_FMT_QSV,
};
static const AVOption hevc_options[] = {
{ "async_depth", "Internal parallelization depth, the higher the value the higher the latency.", OFFSET(qsv.async_depth), AV_OPT_TYPE_INT, { .i64 = ASYNC_DEPTH_DEFAULT }, 0, INT_MAX, VD },
{ "load_plugin", "A user plugin to load in an internal session", OFFSET(load_plugin), AV_OPT_TYPE_INT, { .i64 = LOAD_PLUGIN_HEVC_SW }, LOAD_PLUGIN_NONE, LOAD_PLUGIN_HEVC_SW, VD, "load_plugin" },
{ "none", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_NONE }, 0, 0, VD, "load_plugin" },
{ "hevc_sw", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = LOAD_PLUGIN_HEVC_SW }, 0, 0, VD, "load_plugin" },
{ "load_plugins", "A :-separate list of hexadecimal plugin UIDs to load in an internal session",
OFFSET(qsv.load_plugins), AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VD },
{ NULL },
};
static const AVClass hevc_class = {
.class_name = "hevc_qsv",
.item_name = av_default_item_name,
.option = hevc_options,
.version = LIBAVUTIL_VERSION_INT,
};
AVCodec ff_hevc_qsv_decoder = {
.name = "hevc_qsv",
.long_name = NULL_IF_CONFIG_SMALL("HEVC (Intel Quick Sync Video acceleration)"),
.priv_data_size = sizeof(QSVH2645Context),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.init = qsv_decode_init,
.decode = qsv_decode_frame,
.flush = qsv_decode_flush,
.close = qsv_decode_close,
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
.priv_class = &hevc_class,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
AV_PIX_FMT_QSV,
AV_PIX_FMT_NONE },
};
#endif
#if CONFIG_H264_QSV_DECODER
AVHWAccel ff_h264_qsv_hwaccel = {
.name = "h264_qsv",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.pix_fmt = AV_PIX_FMT_QSV,
};
static const AVOption options[] = {
{ "async_depth", "Internal parallelization depth, the higher the value the higher the latency.", OFFSET(qsv.async_depth), AV_OPT_TYPE_INT, { .i64 = ASYNC_DEPTH_DEFAULT }, 0, INT_MAX, VD },
{ NULL },
};
static const AVClass class = {
.class_name = "h264_qsv",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVCodec ff_h264_qsv_decoder = {
.name = "h264_qsv",
.long_name = NULL_IF_CONFIG_SMALL("H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (Intel Quick Sync Video acceleration)"),
.priv_data_size = sizeof(QSVH2645Context),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.init = qsv_decode_init,
.decode = qsv_decode_frame,
.flush = qsv_decode_flush,
.close = qsv_decode_close,
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_DR1,
.priv_class = &class,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_NV12,
AV_PIX_FMT_QSV,
AV_PIX_FMT_NONE },
};
#endif