[FFmpeg-devel] [PATCH 34/36] avcodec/dump_extradata_bsf: Remove intermediate packet

[Andreas Rheinhardt]

This commit ends using separate packets for in- and output. Instead,
the input is read directly into the packet destined for output via
ff_bsf_get_packet_ref() and only the buffer-related fields are modified;
the others are not touched.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
---
 libavcodec/dump_extradata_bsf.c | 33 ++++++++++++++-------------------
 1 file changed, 14 insertions(+), 19 deletions(-)

diff --git a/libavcodec/dump_extradata_bsf.c b/libavcodec/dump_extradata_bsf.c
index be5e23ba5b..5df7e064cf 100644
--- a/libavcodec/dump_extradata_bsf.c
+++ b/libavcodec/dump_extradata_bsf.c
@@ -33,49 +33,44 @@ enum DumpFreq {
 
 typedef struct DumpExtradataContext {
     const AVClass *class;
-    AVPacket pkt;
     int freq;
 } DumpExtradataContext;
 
-static int dump_extradata(AVBSFContext *ctx, AVPacket *out)
+static int dump_extradata(AVBSFContext *ctx, AVPacket *pkt)
 {
     DumpExtradataContext *s = ctx->priv_data;
     const AVCodecParameters *par;
-    AVPacket *in = &s->pkt;
     int ret = 0;
 
-    ret = ff_bsf_get_packet_ref(ctx, in);
+    ret = ff_bsf_get_packet_ref(ctx, pkt);
     if (ret < 0)
         return ret;
 
     if ((par = ctx->par_in)->extradata_size &&
         (s->freq == DUMP_FREQ_ALL ||
-         (s->freq == DUMP_FREQ_KEYFRAME && in->flags & AV_PKT_FLAG_KEY)) &&
-         (in->size < par->extradata_size ||
-          memcmp(in->data, par->extradata, par->extradata_size))) {
-        if (in->size >= INT_MAX - par->extradata_size) {
+         (s->freq == DUMP_FREQ_KEYFRAME && pkt->flags & AV_PKT_FLAG_KEY)) &&
+         (pkt->size < par->extradata_size ||
+          memcmp(pkt->data, par->extradata, par->extradata_size))) {
+        AVBufferRef *out = NULL;
+
+        if (pkt->size >= INT_MAX - par->extradata_size) {
             ret = AVERROR(ERANGE);
             goto fail;
         }
 
-        ret = av_new_packet(out, in->size + par->extradata_size);
+        ret = ff_buffer_padded_realloc(&out, pkt->size + par->extradata_size);
         if (ret < 0)
             goto fail;
 
-        ret = av_packet_copy_props(out, in);
-        if (ret < 0) {
-            av_packet_unref(out);
-            goto fail;
-        }
-
         memcpy(out->data, par->extradata, par->extradata_size);
-        memcpy(out->data + par->extradata_size, in->data, in->size);
-    } else {
-        av_packet_move_ref(out, in);
+        memcpy(out->data + par->extradata_size, pkt->data, pkt->size);
+
+        ff_packet_replace_buffer(pkt, out);
     }
 
 fail:
-    av_packet_unref(in);
+    if (ret < 0)
+        av_packet_unref(pkt);
 
     return ret;
 }
-- 
2.20.1