avformat: Constify all muxer/demuxers

[ffmpeg] / libavformat / concatdec.c

diff --git a/libavformat/concatdec.c b/libavformat/concatdec.c
index d65da553e145aeecc7271f15beacfe4e7c0f82d7..65fbe0a854d66af52114d624a48f97af7ca06db8 100644 (file)
--- a/libavformat/concatdec.c
+++ b/libavformat/concatdec.c
@@ -68,7 +68,7 @@ typedef struct {
     int segment_time_metadata;
 } ConcatContext;
 
-static int concat_probe(AVProbeData *probe)
+static int concat_probe(const AVProbeData *probe)
 {
     return memcmp(probe->buf, "ffconcat version 1.0", 20) ?
            0 : AVPROBE_SCORE_MAX;
@@ -113,7 +113,8 @@ static int add_file(AVFormatContext *avf, char *filename, ConcatFile **rfile,
     ConcatFile *file;
     char *url = NULL;
     const char *proto;
-    size_t url_len, proto_len;
+    const char *ptr;
+    size_t url_len;
     int ret;
 
     if (cat->safe > 0 && !safe_filename(filename)) {
@@ -122,9 +123,8 @@ static int add_file(AVFormatContext *avf, char *filename, ConcatFile **rfile,
     }
 
     proto = avio_find_protocol_name(filename);
-    proto_len = proto ? strlen(proto) : 0;
-    if (proto && !memcmp(filename, proto, proto_len) &&
-        (filename[proto_len] == ':' || filename[proto_len] == ',')) {
+    if (proto && av_strstart(filename, proto, &ptr) &&
+        (*ptr == ':' || *ptr == ',')) {
         url = filename;
         filename = NULL;
     } else {
@@ -171,10 +171,6 @@ static int copy_stream_props(AVStream *st, AVStream *source_st)
 
     if (st->codecpar->codec_id || !source_st->codecpar->codec_id) {
         if (st->codecpar->extradata_size < source_st->codecpar->extradata_size) {
-            if (st->codecpar->extradata) {
-                av_freep(&st->codecpar->extradata);
-                st->codecpar->extradata_size = 0;
-            }
             ret = ff_alloc_extradata(st->codecpar,
                                      source_st->codecpar->extradata_size);
             if (ret < 0)
@@ -546,7 +542,6 @@ static int filter_packet(AVFormatContext *avf, ConcatStream *cs, AVPacket *pkt)
         if (ret < 0) {
             av_log(avf, AV_LOG_ERROR, "h264_mp4toannexb filter "
                    "failed to send input packet\n");
-            av_packet_unref(pkt);
             return ret;
         }
 
@@ -596,7 +591,6 @@ static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
         if (ret < 0)
             return ret;
         if ((ret = match_streams(avf)) < 0) {
-            av_packet_unref(pkt);
             return ret;
         }
         if (packet_after_outpoint(cat, pkt)) {
@@ -612,7 +606,7 @@ static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
         }
         break;
     }
-    if ((ret = filter_packet(avf, cs, pkt)))
+    if ((ret = filter_packet(avf, cs, pkt)) < 0)
         return ret;
 
     st = cat->avf->streams[pkt->stream_index];
@@ -632,17 +626,16 @@ static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
            av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &st->time_base),
            av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &st->time_base));
     if (cat->cur_file->metadata) {
-        uint8_t* metadata;
-        int metadata_len;
+        size_t metadata_len;
         char* packed_metadata = av_packet_pack_dictionary(cat->cur_file->metadata, &metadata_len);
         if (!packed_metadata)
             return AVERROR(ENOMEM);
-        if (!(metadata = av_packet_new_side_data(pkt, AV_PKT_DATA_STRINGS_METADATA, metadata_len))) {
+        ret = av_packet_add_side_data(pkt, AV_PKT_DATA_STRINGS_METADATA,
+                                      packed_metadata, metadata_len);
+        if (ret < 0) {
             av_freep(&packed_metadata);
-            return AVERROR(ENOMEM);
+            return ret;
         }
-        memcpy(metadata, packed_metadata, metadata_len);
-        av_freep(&packed_metadata);
     }
 
     if (cat->cur_file->duration == AV_NOPTS_VALUE && st->cur_dts != AV_NOPTS_VALUE) {
@@ -653,7 +646,7 @@ static int concat_read_packet(AVFormatContext *avf, AVPacket *pkt)
     }
 
     pkt->stream_index = cs->out_stream_index;
-    return ret;
+    return 0;
 }
 
 static void rescale_interval(AVRational tb_in, AVRational tb_out,
@@ -782,7 +775,7 @@ static const AVClass concat_class = {
 };
 
 
-AVInputFormat ff_concat_demuxer = {
+const AVInputFormat ff_concat_demuxer = {
     .name           = "concat",
     .long_name      = NULL_IF_CONFIG_SMALL("Virtual concatenation script"),
     .priv_data_size = sizeof(ConcatContext),