src/zm_packet.cpp
Rama master · réplica de lectura del repositorio original.
//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"
extern "C" {
#include <libavutil/pixdesc.h>
}
using namespace std;
AVPixelFormat target_format = AV_PIX_FMT_NONE;
ZMPacket::ZMPacket() :
locked(false),
keyframe(0),
stream(nullptr),
image(nullptr),
y_image(nullptr),
analysis_image(nullptr),
score(-1),
codec_type(AVMEDIA_TYPE_UNKNOWN),
image_index(-1),
queue_index(0),
codec_imgsize(0),
pts(0),
decoded(false),
analyzed(false) {
packet = av_packet_ptr{av_packet_alloc()};
}
ZMPacket::ZMPacket(Image *i, SystemTimePoint tv) :
locked(false),
keyframe(0),
stream(nullptr),
timestamp(tv),
image(i),
y_image(nullptr),
analysis_image(nullptr),
score(-1),
codec_type(AVMEDIA_TYPE_UNKNOWN),
image_index(-1),
queue_index(0),
codec_imgsize(0),
pts(0),
decoded(false),
analyzed(false) {
packet = av_packet_ptr{av_packet_alloc()};
}
ZMPacket::ZMPacket(ZMPacket &p) :
locked(false),
keyframe(p.keyframe),
stream(p.stream),
timestamp(p.timestamp),
image(p.image),
y_image(p.y_image),
analysis_image(p.analysis_image),
score(p.score),
codec_type(AVMEDIA_TYPE_UNKNOWN),
image_index(p.image_index),
queue_index(p.queue_index),
codec_imgsize(0),
pts(p.pts),
decoded(p.decoded),
analyzed(p.analyzed) {
packet = av_packet_ptr{av_packet_alloc()};
if (av_packet_ref(packet.get(), p.packet.get()) < 0) {
Error("error refing packet");
}
}
ZMPacket::~ZMPacket() {
delete analysis_image;
delete image;
delete y_image;
}
void ZMPacket::release_frames() {
// y_image points into in_frame's Y plane, so it goes first.
delete y_image;
y_image = nullptr;
in_frame = nullptr;
hw_frame = nullptr;
}
void ZMPacket::release_decoded() {
release_frames();
delete image;
image = nullptr;
delete analysis_image;
analysis_image = nullptr;
out_frame = nullptr;
}
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);
}
int ZMPacket::send_packet(AVCodecContext *ctx) {
// ret == 0 means EAGAIN
int ret = avcodec_send_packet(ctx, packet.get());
if (ret < 0) {
if (ret == AVERROR(EAGAIN)) {
Debug(1, "Unable to send packet %d %s, packet %d", ret, av_make_error_string(ret).c_str(), image_index);
//ret = avcodec_send_packet(ctx, packet.get());
return 0;
} else {
Error("Unable to send packet %d %s, packet %d", ret, av_make_error_string(ret).c_str(), image_index);
return ret;
}
}
Debug(3, "Ret from send_packet %d %s, packet %d", ret, av_make_error_string(ret).c_str(), image_index);
return 1;
}
/* Returns < 0 on error, 0 for go again, > 0 for success */
int ZMPacket::receive_frame(AVCodecContext *ctx) {
av_frame_ptr receive_frame{av_frame_alloc()};
if (!receive_frame) {
Error("Error allocating frame");
return -1;
}
int ret = avcodec_receive_frame(ctx, receive_frame.get());
if (ret < 0) {
if (ret == AVERROR(EAGAIN)) {
Debug(1, "Ret from receive_frame ret: %d %s, packet %d", ret, av_make_error_string(ret).c_str(), image_index);
return 0;
} else {
Error("Ret from receive_frame ret: %d %s, packet %d", ret, av_make_error_string(ret).c_str(), image_index);
return ret;
}
}
// For hardware frames, do the transfer immediately while the context is valid
// The nvidia-vaapi-driver can have issues if there's a delay between decode and transfer
#if HAVE_LIBAVUTIL_HWCONTEXT_H
#if LIBAVCODEC_VERSION_CHECK(57, 89, 0, 89, 0)
if (receive_frame->hw_frames_ctx) {
Debug(2, "Hardware frame received, transferring immediately");
av_frame_ptr sw_frame{av_frame_alloc()};
ret = av_hwframe_transfer_data(sw_frame.get(), receive_frame.get(), 0);
if (ret < 0) {
Error("Immediate hw transfer failed: %s, packet %d", av_make_error_string(ret).c_str(), image_index);
return ret;
}
ret = av_frame_copy_props(sw_frame.get(), receive_frame.get());
if (ret < 0) {
Warning("Failed to copy frame props: %s", av_make_error_string(ret).c_str());
}
// Release GPU surface immediately - we have the software frame now
// Keeping hw_frame would hold GPU memory and exhaust the surface pool
// receive_frame goes out of scope here and releases the surface
in_frame = std::move(sw_frame);
zm_dump_video_frame(in_frame.get(), "After immediate hwtransfer");
return 1;
}
#endif
#endif
in_frame = std::move(receive_frame);
return 1;
} // end int ZMPacket::receive_frame(AVCodecContext *ctx)
bool ZMPacket::needs_hw_transfer(AVCodecContext *ctx) {
if (!(ctx && in_frame.get())) {
Error("No ctx %p or in_frame %p", ctx, in_frame.get());
return false;
}
#if HAVE_LIBAVUTIL_HWCONTEXT_H
#if LIBAVCODEC_VERSION_CHECK(57, 89, 0, 89, 0)
// If frame has no hw_frames_ctx, it's already a software frame
if (!in_frame->hw_frames_ctx) {
return false;
}
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)))
) {
return true;
}
#endif
#endif
return false;
}
int ZMPacket::transfer_hwframe(AVCodecContext *ctx) {
if (hw_frame) {
// Already transferred in receive_frame
Debug(2, "Hardware frame already transferred");
return 1;
}
#if HAVE_LIBAVUTIL_HWCONTEXT_H
#if LIBAVCODEC_VERSION_CHECK(57, 89, 0, 89, 0)
if (needs_hw_transfer(ctx)) {
Debug(4, "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))
);
// Frame gets moved no matter what
hw_frame = std::move(in_frame);
zm_dump_video_frame(hw_frame.get(), "Before hwtransfer");
// Verify hw_frames_ctx is valid before attempting transfer
if (!hw_frame->hw_frames_ctx) {
Error("Hardware frame has no hw_frames_ctx, cannot transfer");
hw_frame = nullptr;
in_frame = nullptr;
return -1;
}
av_frame_ptr new_frame{av_frame_alloc()};
// Don't set format - let FFmpeg use the hw_frames_ctx default format
// (nvidia-vaapi-driver only supports nv12/p010 transfer, not yuvj420p)
// The later swscale conversion will handle format conversion
/* retrieve data from GPU to CPU */
int ret = av_hwframe_transfer_data(new_frame.get(), hw_frame.get(), 0);
if (ret < 0) {
Error("Unable to transfer frame: %s", av_make_error_string(ret).c_str());
hw_frame = nullptr;
in_frame = nullptr;
return ret;
}
ret = av_frame_copy_props(new_frame.get(), hw_frame.get());
if (ret < 0) {
Error("Unable to copy props: %s, continuing", av_make_error_string(ret).c_str());
}
in_frame = std::move(new_frame);
zm_dump_video_frame(in_frame.get(), "After hwtransfer");
} else
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)
);
#endif
#endif
return 1;
} // end ZMPacket::transfer_hwframe
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;
}
Image *ZMPacket::get_y_image() {
if (!y_image) {
if (!in_frame) {
Error("Can't get y_image without frame, maybe need to decode first");
return nullptr;
}
// Check if the pixel format has a Y channel accessible in data[0]
// This requires a planar YUV format (not RGB, not packed YUV)
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(static_cast<AVPixelFormat>(in_frame->format));
if (!desc) {
Error("Unable to get pixel format descriptor for format %d", in_frame->format);
return nullptr;
}
// Must not be RGB (no Y channel) and must be planar (Y is in data[0])
if (desc->flags & AV_PIX_FMT_FLAG_RGB) {
Error("Cannot get Y image from RGB format %s", desc->name);
return nullptr;
}
if (!(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) {
Error("Cannot get Y image from non-planar format %s (Y is interleaved)", desc->name);
return nullptr;
}
// Wrap the decoder's Y plane with its real stride (linesize[0]). The plane
// is packed at the decoder's alignment, which may be smaller than the
// FFALIGN(width,32) a plain Image would assume; recording the true stride
// keeps stride-aware reads (motion analysis) and Rotate/Flip correct.
y_image = new Image(in_frame->width, in_frame->linesize[0], in_frame->height,
1, ZM_SUBPIX_ORDER_NONE, in_frame->data[0], 0);
}
return y_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{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 );
std::unique_lock<std::mutex> ZMPacket::lock() {
std::unique_lock<std::mutex> lck_(mutex_, std::defer_lock);
Debug(4, "locking packet %d %p %d owns %d", image_index, this, locked.load(), lck_.owns_lock());
lck_.lock();
locked = true;
Debug(4, "packet %d locked", image_index);
return lck_;
};
void ZMPacket::lock(std::unique_lock<std::mutex> &lck_) {
Debug(4, "locking packet %d %p %d owns %d", image_index, this, locked.load(), lck_.owns_lock());
lck_.lock();
locked = true;
Debug(4, "packet %d locked", image_index);
};
bool ZMPacket::trylock(std::unique_lock<std::mutex> &lck_) {
Debug(4, "TryLocking packet %d %p locked: %d owns: %d", image_index, this, locked.load(), lck_.owns_lock());
// A failed try_lock must not touch `locked`: another thread holds the
// mutex, and the caller's result must not depend on what others write.
const bool got = lck_.try_lock();
if (got) locked = true;
Debug(4, "TryLocking packet %d %p %d, owns: %d", image_index, this, got, lck_.owns_lock());
return got;
};
void ZMPacket::unlock(std::unique_lock<std::mutex> &lck_) {
Debug(4, "packet %d unlocked, %p, locked %d, owns %d", image_index, this, locked.load(), lck_.owns_lock());
locked = false;
lck_.unlock();
Debug(4, "packet %d unlocked, %p, locked %d, owns %d", image_index, this, locked.load(), lck_.owns_lock());
condition_.notify_all();
};
void ZMPacket::unlock() {
if (locked) {
Debug(4, "packet %d unlocked, %p, locked %d, owns %d", image_index, this, locked.load(), our_lck_.owns_lock());
our_lck_.unlock();
} else {
Error("Attempt to unlock already unlocked packet %d unlocked, %p, locked %d, owns %d", image_index, this, locked.load(), our_lck_.owns_lock());
}
}