From c0771055ec648e0e02dff44a8848e5a60d4c2a73 Mon Sep 17 00:00:00 2001
From: Paul B Mahol <onemda@gmail.com>
Date: Sun, 25 Sep 2022 15:48:13 +0200
Subject: [PATCH] avcodec/pnmdec: implement FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM

---
 libavcodec/pnmdec.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libavcodec/pnmdec.c b/libavcodec/pnmdec.c
index 6ba54ddccd..e95b4072eb 100644
--- a/libavcodec/pnmdec.c
+++ b/libavcodec/pnmdec.c
@@ -59,6 +59,9 @@ static int pnm_decode_frame(AVCodecContext *avctx, AVFrame *p,
     if ((ret = ff_pnm_decode_header(avctx, s)) < 0)
         return ret;
 
+    if (avctx->skip_frame >= AVDISCARD_ALL)
+        return avpkt->size;
+
     if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
         return ret;
     p->pict_type = AV_PICTURE_TYPE_I;
@@ -408,6 +411,7 @@ const FFCodec ff_pgm_decoder = {
     .p.id           = AV_CODEC_ID_PGM,
     .p.capabilities = AV_CODEC_CAP_DR1,
     .priv_data_size = sizeof(PNMContext),
+    .caps_internal  = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
     FF_CODEC_DECODE_CB(pnm_decode_frame),
 };
 #endif
@@ -420,6 +424,7 @@ const FFCodec ff_pgmyuv_decoder = {
     .p.id           = AV_CODEC_ID_PGMYUV,
     .p.capabilities = AV_CODEC_CAP_DR1,
     .priv_data_size = sizeof(PNMContext),
+    .caps_internal  = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
     FF_CODEC_DECODE_CB(pnm_decode_frame),
 };
 #endif
@@ -432,6 +437,7 @@ const FFCodec ff_ppm_decoder = {
     .p.id           = AV_CODEC_ID_PPM,
     .p.capabilities = AV_CODEC_CAP_DR1,
     .priv_data_size = sizeof(PNMContext),
+    .caps_internal  = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
     FF_CODEC_DECODE_CB(pnm_decode_frame),
 };
 #endif
@@ -444,6 +450,7 @@ const FFCodec ff_pbm_decoder = {
     .p.id           = AV_CODEC_ID_PBM,
     .p.capabilities = AV_CODEC_CAP_DR1,
     .priv_data_size = sizeof(PNMContext),
+    .caps_internal  = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
     FF_CODEC_DECODE_CB(pnm_decode_frame),
 };
 #endif
@@ -456,6 +463,7 @@ const FFCodec ff_pam_decoder = {
     .p.id           = AV_CODEC_ID_PAM,
     .p.capabilities = AV_CODEC_CAP_DR1,
     .priv_data_size = sizeof(PNMContext),
+    .caps_internal  = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
     FF_CODEC_DECODE_CB(pnm_decode_frame),
 };
 #endif
@@ -468,6 +476,7 @@ const FFCodec ff_pfm_decoder = {
     .p.id           = AV_CODEC_ID_PFM,
     .p.capabilities = AV_CODEC_CAP_DR1,
     .priv_data_size = sizeof(PNMContext),
+    .caps_internal  = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
     FF_CODEC_DECODE_CB(pnm_decode_frame),
 };
 #endif
@@ -490,6 +499,7 @@ const FFCodec ff_phm_decoder = {
     .p.capabilities = AV_CODEC_CAP_DR1,
     .priv_data_size = sizeof(PNMContext),
     .init           = phm_dec_init,
+    .caps_internal  = FF_CODEC_CAP_SKIP_FRAME_FILL_PARAM,
     FF_CODEC_DECODE_CB(pnm_decode_frame),
 };
 #endif