X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fparser.c;h=fc57246965ccd2f149ea1c05579f58583daaa381;hb=e5af9203098a889f36b759652615046254d45102;hp=0a994a3f30be699d7dfa6e6756f701caeaeb839c;hpb=398000abcf980d239a789da6f69811913d2fc635;p=ffmpeg

diff --git a/libavcodec/parser.c b/libavcodec/parser.c
index 0a994a3f30b..fc57246965c 100644
--- a/libavcodec/parser.c
+++ b/libavcodec/parser.c
@@ -55,7 +55,7 @@ found:
     s = av_mallocz(sizeof(AVCodecParserContext));
     if (!s)
         goto err_out;
-    s->parser = (AVCodecParser*)parser;
+    s->parser = parser;
     s->priv_data = av_mallocz(parser->priv_data_size);
     if (!s->priv_data)
         goto err_out;
@@ -67,11 +67,6 @@ found:
             goto err_out;
     }
     s->key_frame            = -1;
-#if FF_API_CONVERGENCE_DURATION
-FF_DISABLE_DEPRECATION_WARNINGS
-    s->convergence_duration = 0;
-FF_ENABLE_DEPRECATION_WARNINGS
-#endif
     s->dts_sync_point       = INT_MIN;
     s->dts_ref_dts_delta    = INT_MIN;
     s->pts_dts_delta        = INT_MIN;
@@ -179,6 +174,9 @@ int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx,
         /* offset of the next frame */
         s->next_frame_offset = s->cur_offset + index;
         s->fetch_timestamp   = 1;
+    } else {
+        /* Don't return a pointer to dummy_buf. */
+        *poutbuf = NULL;
     }
     if (index < 0)
         index = 0;
@@ -186,41 +184,6 @@ int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx,
     return index;
 }
 
-int av_parser_change(AVCodecParserContext *s, AVCodecContext *avctx,
-                     uint8_t **poutbuf, int *poutbuf_size,
-                     const uint8_t *buf, int buf_size, int keyframe)
-{
-    if (s && s->parser->split) {
-        if (avctx->flags  & AV_CODEC_FLAG_GLOBAL_HEADER ||
-            avctx->flags2 & AV_CODEC_FLAG2_LOCAL_HEADER) {
-            int i = s->parser->split(avctx, buf, buf_size);
-            buf      += i;
-            buf_size -= i;
-        }
-    }
-
-    /* cast to avoid warning about discarding qualifiers */
-    *poutbuf      = (uint8_t *) buf;
-    *poutbuf_size = buf_size;
-    if (avctx->extradata) {
-        if (keyframe && (avctx->flags2 & AV_CODEC_FLAG2_LOCAL_HEADER)) {
-            int size = buf_size + avctx->extradata_size;
-
-            *poutbuf_size = size;
-            *poutbuf      = av_malloc(size + AV_INPUT_BUFFER_PADDING_SIZE);
-            if (!*poutbuf)
-                return AVERROR(ENOMEM);
-
-            memcpy(*poutbuf, avctx->extradata, avctx->extradata_size);
-            memcpy(*poutbuf + avctx->extradata_size, buf,
-                   buf_size + AV_INPUT_BUFFER_PADDING_SIZE);
-            return 1;
-        }
-    }
-
-    return 0;
-}
-
 void av_parser_close(AVCodecParserContext *s)
 {
     if (s) {
@@ -245,6 +208,9 @@ int ff_combine_frame(ParseContext *pc, int next,
     for (; pc->overread > 0; pc->overread--)
         pc->buffer[pc->index++] = pc->buffer[pc->overread_index++];
 
+    if (next > *buf_size)
+        return AVERROR(EINVAL);
+
     /* flush remaining if EOF */
     if (!*buf_size && next == END_NOT_FOUND)
         next = 0;
@@ -292,6 +258,10 @@ int ff_combine_frame(ParseContext *pc, int next,
         *buf      = pc->buffer;
     }
 
+    if (next < -8) {
+        pc->overread += -8 - next;
+        next = -8;
+    }
     /* store overread bytes */
     for (; next < 0; next++) {
         pc->state   = pc->state   << 8 | pc->buffer[pc->last_index + next];
@@ -315,17 +285,3 @@ void ff_parse_close(AVCodecParserContext *s)
 
     av_freep(&pc->buffer);
 }
-
-int ff_mpeg4video_split(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
-{
-    uint32_t state = -1;
-    const uint8_t *ptr = buf, *end = buf + buf_size;
-
-    while (ptr < end) {
-        ptr = avpriv_find_start_code(ptr, end, &state);
-        if (state == 0x1B3 || state == 0x1B6)
-            return ptr - 4 - buf;
-    }
-
-    return 0;
-}