avfilter/vf_identity: remove unnecessary check

[ffmpeg] / libavformat / paf.c

diff --git a/libavformat/paf.c b/libavformat/paf.c
index b3c8e786bc16b1ea63e46ff88af30598dfe93716..f48b2e60cd3798171ba2e1e406c5ef93235bc18f 100644 (file)
--- a/libavformat/paf.c
+++ b/libavformat/paf.c
@@ -75,14 +75,18 @@ static int read_close(AVFormatContext *s)
     return 0;
 }
 
-static void read_table(AVFormatContext *s, uint32_t *table, uint32_t count)
+static int read_table(AVFormatContext *s, uint32_t *table, uint32_t count)
 {
     int i;
 
-    for (i = 0; i < count; i++)
+    for (i = 0; i < count; i++) {
+        if (avio_feof(s->pb))
+            return AVERROR_INVALIDDATA;
         table[i] = avio_rl32(s->pb);
+    }
 
     avio_skip(s->pb, 4 * (FFALIGN(count, 512) - count));
+    return 0;
 }
 
 static int read_header(AVFormatContext *s)
@@ -132,6 +136,10 @@ static int read_header(AVFormatContext *s)
     p->start_offset   = avio_rl32(pb);
     p->max_video_blks = avio_rl32(pb);
     p->max_audio_blks = avio_rl32(pb);
+
+    if (avio_feof(pb))
+        return AVERROR_INVALIDDATA;
+
     if (p->buffer_size    < 175  ||
         p->max_audio_blks < 2    ||
         p->max_video_blks < 1    ||
@@ -145,11 +153,11 @@ static int read_header(AVFormatContext *s)
         p->frame_blks     > INT_MAX / sizeof(uint32_t))
         return AVERROR_INVALIDDATA;
 
-    p->blocks_count_table  = av_mallocz(p->nb_frames *
+    p->blocks_count_table  = av_malloc_array(p->nb_frames,
                                         sizeof(*p->blocks_count_table));
-    p->frames_offset_table = av_mallocz(p->nb_frames *
+    p->frames_offset_table = av_malloc_array(p->nb_frames,
                                         sizeof(*p->frames_offset_table));
-    p->blocks_offset_table = av_mallocz(p->frame_blks *
+    p->blocks_offset_table = av_malloc_array(p->frame_blks,
                                         sizeof(*p->blocks_offset_table));
 
     p->video_size  = p->max_video_blks * p->buffer_size;
@@ -171,9 +179,15 @@ static int read_header(AVFormatContext *s)
 
     avio_seek(pb, p->buffer_size, SEEK_SET);
 
-    read_table(s, p->blocks_count_table,  p->nb_frames);
-    read_table(s, p->frames_offset_table, p->nb_frames);
-    read_table(s, p->blocks_offset_table, p->frame_blks);
+    ret = read_table(s, p->blocks_count_table,  p->nb_frames);
+    if (ret < 0)
+        goto fail;
+    ret = read_table(s, p->frames_offset_table, p->nb_frames);
+    if (ret < 0)
+        goto fail;
+    ret = read_table(s, p->blocks_offset_table, p->frame_blks);
+    if (ret < 0)
+        goto fail;
 
     p->got_audio = 0;
     p->current_frame = 0;
@@ -194,7 +208,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
     PAFDemuxContext *p  = s->priv_data;
     AVIOContext     *pb = s->pb;
     uint32_t        count, offset;
-    int             size, i;
+    int             size, i, ret;
 
     if (p->current_frame >= p->nb_frames)
         return AVERROR_EOF;
@@ -203,8 +217,8 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
         return AVERROR_EOF;
 
     if (p->got_audio) {
-        if (av_new_packet(pkt, p->audio_size) < 0)
-            return AVERROR(ENOMEM);
+        if ((ret = av_new_packet(pkt, p->audio_size)) < 0)
+            return ret;
 
         memcpy(pkt->data, p->temp_audio_frame, p->audio_size);
         pkt->duration     = PAF_SOUND_SAMPLES * (p->audio_size / PAF_SOUND_FRAME_SIZE);
@@ -244,8 +258,8 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
 
     size = p->video_size - p->frames_offset_table[p->current_frame];
 
-    if (av_new_packet(pkt, size) < 0)
-        return AVERROR(ENOMEM);
+    if ((ret = av_new_packet(pkt, size)) < 0)
+        return ret;
 
     pkt->stream_index = 0;
     pkt->duration     = 1;
@@ -257,7 +271,7 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
     return pkt->size;
 }
 
-AVInputFormat ff_paf_demuxer = {
+const AVInputFormat ff_paf_demuxer = {
     .name           = "paf",
     .long_name      = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File"),
     .priv_data_size = sizeof(PAFDemuxContext),