doc/APIchanges: add hashes and version numbers for recent entries

[ffmpeg] / libavcodec / parser.c

diff --git a/libavcodec/parser.c b/libavcodec/parser.c
index 747ea2ee8aacad1fc1d25777afc2241d73923a97..fc57246965ccd2f149ea1c05579f58583daaa381 100644 (file)
--- a/libavcodec/parser.c
+++ b/libavcodec/parser.c
@@ -27,41 +27,21 @@
 #include "libavutil/avassert.h"
 #include "libavutil/internal.h"
 #include "libavutil/mem.h"
-#include "libavutil/thread.h"
 
 #include "internal.h"
 #include "parser.h"
 
-static AVCodecParser *av_first_parser = NULL;
-
-AVCodecParser *av_parser_next(const AVCodecParser *p)
-{
-    if (p)
-        return p->next;
-    else
-        return av_first_parser;
-}
-
-static AVMutex parser_register_mutex = AV_MUTEX_INITIALIZER;
-
-void av_register_codec_parser(AVCodecParser *parser)
-{
-    ff_mutex_lock(&parser_register_mutex);
-    parser->next = av_first_parser;
-    av_first_parser = parser;
-    ff_mutex_unlock(&parser_register_mutex);
-}
-
 AVCodecParserContext *av_parser_init(int codec_id)
 {
     AVCodecParserContext *s = NULL;
-    AVCodecParser *parser;
+    const AVCodecParser *parser;
+    void *i = 0;
     int ret;
 
     if (codec_id == AV_CODEC_ID_NONE)
         return NULL;
 
-    for (parser = av_first_parser; parser; parser = parser->next) {
+    while ((parser = av_parser_iterate(&i))) {
         if (parser->codec_ids[0] == codec_id ||
             parser->codec_ids[1] == codec_id ||
             parser->codec_ids[2] == codec_id ||
@@ -87,11 +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;
@@ -199,6 +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;
@@ -206,41 +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) {
@@ -265,6 +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;
@@ -312,6 +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];
@@ -335,17 +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;
-}