File 0004-VideoPlayer-stop-using-AVFrame.pkt_pos.patch of Package subtitlecomposer5

From 91b414a778cfc8fcee55f72352043aade2582627 Mon Sep 17 00:00:00 2001
From: Mladen Milinkovic <maxrd2@smoothware.net>
Date: Thu, 1 Aug 2024 10:46:54 +0200
Subject: [PATCH 04/11] VideoPlayer: stop using AVFrame.pkt_pos

This field is ad-hoc and will be deprecated. Use the recently-added
AV_CODEC_FLAG_COPY_OPAQUE to pass arbitrary user data from packets to
frames.
---
 src/videoplayer/backend/audiodecoder.cpp |  4 +++-
 src/videoplayer/backend/decoder.cpp      | 17 +++++++++++++----
 src/videoplayer/backend/decoder.h        |  4 ++++
 src/videoplayer/backend/videodecoder.cpp |  4 +++-
 4 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/src/videoplayer/backend/audiodecoder.cpp b/src/videoplayer/backend/audiodecoder.cpp
index 8c0b943e..35144965 100644
--- a/src/videoplayer/backend/audiodecoder.cpp
+++ b/src/videoplayer/backend/audiodecoder.cpp
@@ -490,8 +490,10 @@ AudioDecoder::run()
 			if(!(af->frame = av_frame_alloc()))
 				break;
 
+			Decoder::FrameData *fd = reinterpret_cast<Decoder::FrameData*>(frame->opaque_ref ? frame->opaque_ref->data : nullptr);
+
 			af->pts = frame->pts == AV_NOPTS_VALUE ? NAN : double(frame->pts) / frame->sample_rate;
-			af->pos = frame->pkt_pos;
+			af->pos = fd ? fd->pkt_pos : -1;
 			af->serial = m_pktSerial;
 			af->duration = double(frame->nb_samples) / frame->sample_rate;
 
diff --git a/src/videoplayer/backend/decoder.cpp b/src/videoplayer/backend/decoder.cpp
index 80fb993f..222056d0 100644
--- a/src/videoplayer/backend/decoder.cpp
+++ b/src/videoplayer/backend/decoder.cpp
@@ -133,10 +133,19 @@ Decoder::decodeFrame(AVFrame *frame, AVSubtitle *sub)
 			} else {
 				ret = pkt->data ? AVERROR(EAGAIN) : AVERROR_EOF;
 			}
-		} else if(avcodec_send_packet(m_avCtx, pkt) == AVERROR(EAGAIN)) {
-			av_log(m_avCtx, AV_LOG_ERROR, "Receive_frame and send_packet both returned EAGAIN, which is an API violation.\n");
-			m_pkt = pkt;
-			pkt = nullptr;
+		} else {
+			if(pkt->buf && !pkt->opaque_ref) {
+				pkt->opaque_ref = av_buffer_allocz(sizeof(Decoder::FrameData));
+				if(!pkt->opaque_ref)
+					return AVERROR(ENOMEM);
+				Decoder::FrameData *fd = reinterpret_cast<Decoder::FrameData*>(pkt->opaque_ref->data);
+				fd->pkt_pos = pkt->pos;
+			}
+			if(avcodec_send_packet(m_avCtx, pkt) == AVERROR(EAGAIN)) {
+				av_log(m_avCtx, AV_LOG_ERROR, "Receive_frame and send_packet both returned EAGAIN, which is an API violation.\n");
+				m_pkt = pkt;
+				pkt = nullptr;
+			}
 		}
 		av_packet_free(&pkt);
 	}
diff --git a/src/videoplayer/backend/decoder.h b/src/videoplayer/backend/decoder.h
index 55970668..f4dd8c7e 100644
--- a/src/videoplayer/backend/decoder.h
+++ b/src/videoplayer/backend/decoder.h
@@ -55,6 +55,10 @@ protected:
 	AVRational m_startPtsTb;
 	int64_t m_nextPts;
 	AVRational m_nextPtsTb;
+
+	struct FrameData {
+		int64_t pkt_pos;
+	};
 };
 }
 
diff --git a/src/videoplayer/backend/videodecoder.cpp b/src/videoplayer/backend/videodecoder.cpp
index 851f6268..d5bd111e 100644
--- a/src/videoplayer/backend/videodecoder.cpp
+++ b/src/videoplayer/backend/videodecoder.cpp
@@ -101,8 +101,10 @@ VideoDecoder::run()
 		if(!ret)
 			continue;
 
+		Decoder::FrameData *fd = reinterpret_cast<Decoder::FrameData*>(frame->opaque_ref ? frame->opaque_ref->data : nullptr);
+
 		double pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * m_timeBase;
-		ret = queuePicture(frame, pts, frameDuration, frame->pkt_pos, pktSerial());
+		ret = queuePicture(frame, pts, frameDuration, fd ? fd->pkt_pos : -1, pktSerial());
 		av_frame_unref(frame);
 
 		if(ret < 0)
-- 
2.46.0