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zoneminder/src/zm_packet.cpp

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//ZoneMinder Packet Implementation Class
//Copyright 2017 ZoneMinder LLC
//
//This file is part of ZoneMinder.
//
//ZoneMinder is free software: you can redistribute it and/or modify
//it under the terms of the GNU General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//
//ZoneMinder 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 General Public License for more details.
//
//You should have received a copy of the GNU General Public License
//along with ZoneMinder. If not, see <http://www.gnu.org/licenses/>.
#include "zm_packet.h"
#include "zm_ffmpeg.h"
#include "zm_image.h"
#include "zm_logger.h"
using namespace std;
AVPixelFormat target_format = AV_PIX_FMT_NONE;
ZMPacket::ZMPacket() :
keyframe(0),
stream(nullptr),
image(nullptr),
y_image(nullptr),
analysis_image(nullptr),
score(-1),
codec_type(AVMEDIA_TYPE_UNKNOWN),
image_index(-1),
codec_imgsize(0),
pts(0),
decoded(false)
{
packet = av_packet_ptr{av_packet_alloc()};
}
ZMPacket::ZMPacket(Image *i, SystemTimePoint tv) :
keyframe(0),
stream(nullptr),
timestamp(tv),
image(i),
y_image(nullptr),
analysis_image(nullptr),
score(-1),
codec_type(AVMEDIA_TYPE_UNKNOWN),
image_index(-1),
codec_imgsize(0),
pts(0),
decoded(false)
{
packet = av_packet_ptr{av_packet_alloc()};
}
ZMPacket::ZMPacket(ZMPacket &p) :
keyframe(0),
stream(nullptr),
timestamp(p.timestamp),
image(nullptr),
y_image(nullptr),
analysis_image(nullptr),
score(-1),
codec_type(AVMEDIA_TYPE_UNKNOWN),
image_index(-1),
codec_imgsize(0),
pts(0),
decoded(false)
{
packet = av_packet_ptr{av_packet_alloc()};
if (zm_av_packet_ref(packet.get(), p.packet.get()) < 0) {
Error("error refing packet");
}
}
ZMPacket::~ZMPacket() {
delete analysis_image;
delete image;
delete y_image;
}
ssize_t ZMPacket::ram() {
return packet->size +
(in_frame ? in_frame->linesize[0] * in_frame->height : 0) +
(out_frame ? out_frame->linesize[0] * out_frame->height : 0) +
(image ? image->Size() : 0) +
(analysis_image ? analysis_image->Size() : 0);
}
/* returns < 0 on error, 0 on not ready, int bytes consumed on success
* This functions job is to populate in_frame with the image in an appropriate
* format. It MAY also populate image if able to. In this case in_frame is populated
* by the image buffer.
*/
int ZMPacket::decode(AVCodecContext *ctx) {
Debug(4, "about to decode video, image_index is (%d)", image_index);
if (in_frame) {
Error("Already have a frame?");
} else {
in_frame = av_frame_ptr{zm_av_frame_alloc()};
}
// packets are always stored in AV_TIME_BASE_Q so need to convert to codec time base
//av_packet_rescale_ts(&packet, AV_TIME_BASE_Q, ctx->time_base);
int ret = zm_send_packet_receive_frame(ctx, in_frame.get(), *packet);
if (ret < 0) {
if (AVERROR(EAGAIN) != ret) {
Warning("Unable to receive frame : code %d %s.",
ret, av_make_error_string(ret).c_str());
}
in_frame = nullptr;
return 0;
}
int bytes_consumed = ret;
if (ret > 0) {
zm_dump_video_frame(in_frame.get(), "got frame");
#if HAVE_LIBAVUTIL_HWCONTEXT_H
#if LIBAVCODEC_VERSION_CHECK(57, 89, 0, 89, 0)
if ((ctx->sw_pix_fmt != AV_PIX_FMT_NONE) and (fix_deprecated_pix_fmt(ctx->sw_pix_fmt) != fix_deprecated_pix_fmt(static_cast<AVPixelFormat>(in_frame->format)))) {
Debug(3, "Have different format ctx->pix_fmt %d %s ?= ctx->sw_pix_fmt %d %s in_frame->format %d %s.",
ctx->pix_fmt,
av_get_pix_fmt_name(ctx->pix_fmt),
ctx->sw_pix_fmt,
av_get_pix_fmt_name(ctx->sw_pix_fmt),
in_frame->format,
av_get_pix_fmt_name(static_cast<AVPixelFormat>(in_frame->format))
);
#if 0
if ( target_format == AV_PIX_FMT_NONE and ctx->hw_frames_ctx and (image->Colours() == 4) ) {
// Look for rgb0 in list of supported formats
enum AVPixelFormat *formats;
if ( 0 <= av_hwframe_transfer_get_formats(
ctx->hw_frames_ctx,
AV_HWFRAME_TRANSFER_DIRECTION_FROM,
&formats,
0
) ) {
for (int i = 0; formats[i] != AV_PIX_FMT_NONE; i++) {
Debug(1, "Available dest formats %d %s",
formats[i],
av_get_pix_fmt_name(formats[i])
);
if ( formats[i] == AV_PIX_FMT_RGB0 ) {
target_format = formats[i];
break;
} // endif RGB0
} // end foreach support format
av_freep(&formats);
} // endif success getting list of formats
} // end if target_format not set
#endif
av_frame_ptr new_frame{zm_av_frame_alloc()};
#if 0
if ( target_format == AV_PIX_FMT_RGB0 ) {
if ( image ) {
if ( 0 > image->PopulateFrame(new_frame) ) {
delete new_frame;
new_frame = zm_av_frame_alloc();
delete image;
image = nullptr;
new_frame->format = target_format;
}
}
}
#endif
/* retrieve data from GPU to CPU */
zm_dump_video_frame(in_frame.get(), "Before hwtransfer");
ret = av_hwframe_transfer_data(new_frame.get(), in_frame.get(), 0);
if (ret < 0) {
Error("Unable to transfer frame: %s, continuing",
av_make_error_string(ret).c_str());
in_frame = nullptr;
return 0;
}
ret = av_frame_copy_props(new_frame.get(), in_frame.get());
if (ret < 0) {
Error("Unable to copy props: %s, continuing",
av_make_error_string(ret).c_str());
}
zm_dump_video_frame(new_frame.get(), "After hwtransfer");
#if 0
if ( new_frame->format == AV_PIX_FMT_RGB0 ) {
new_frame->format = AV_PIX_FMT_RGBA;
zm_dump_video_frame(new_frame, "After hwtransfer setting to rgba");
}
#endif
in_frame = std::move(new_frame);
} else
#endif
#endif
Debug(3, "Same pix format %s so not hwtransferring. sw_pix_fmt is %s",
av_get_pix_fmt_name(ctx->pix_fmt),
av_get_pix_fmt_name(ctx->sw_pix_fmt)
);
#if 0
if ( image ) {
image->Assign(in_frame);
}
#endif
} // end if if ( ret > 0 ) {
return bytes_consumed;
} // end ZMPacket::decode
Image *ZMPacket::get_image(Image *i) {
if (!in_frame) {
Error("Can't get image without frame.. maybe need to decode first");
return nullptr;
}
if (!image) {
if (!i) {
Error("Need a pre-allocated image buffer");
return nullptr;
}
image = i;
}
image->Assign(in_frame.get());
return image;
}
Image *ZMPacket::set_image(Image *i) {
image = i;
return image;
}
AVPacket *ZMPacket::set_packet(AVPacket *p) {
if (zm_av_packet_ref(packet.get(), p) < 0) {
Error("error refing packet");
}
timestamp = std::chrono::system_clock::now();
keyframe = p->flags & AV_PKT_FLAG_KEY;
return packet.get();
}
AVFrame *ZMPacket::get_out_frame(int width, int height, AVPixelFormat format) {
if (!out_frame) {
out_frame = av_frame_ptr{zm_av_frame_alloc()};
if (!out_frame) {
Error("Unable to allocate a frame");
return nullptr;
}
int alignment = 32;
if (width%alignment) alignment = 1;
codec_imgsize = av_image_get_buffer_size(
format, width, height, alignment);
Debug(1, "buffer size %u from %s %dx%d", codec_imgsize, av_get_pix_fmt_name(format), width, height);
out_frame->buf[0] = av_buffer_alloc(codec_imgsize);
if (!out_frame->buf[0]) {
Error("Unable to allocate a frame buffer");
out_frame = nullptr;
return nullptr;
}
int ret;
if ((ret=av_image_fill_arrays(
out_frame->data,
out_frame->linesize,
out_frame->buf[0]->data,
format,
width,
height,
alignment))<0) {
Error("Failed to fill_arrays %s", av_make_error_string(ret).c_str());
out_frame = nullptr;
return nullptr;
}
out_frame->width = width;
out_frame->height = height;
out_frame->format = format;
}
return out_frame.get();
} // end AVFrame *ZMPacket::get_out_frame( AVCodecContext *ctx );
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