avpacket: Replace av_free_packet with av_packet_unref
[ffmpeg.git] / libavformat / utils.c
index 7a054af..94ee9d9 100644 (file)
@@ -41,7 +41,6 @@
 
 #include "audiointerleave.h"
 #include "avformat.h"
-#include "avio_internal.h"
 #include "id3v2.h"
 #include "internal.h"
 #include "metadata.h"
@@ -111,7 +110,7 @@ static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size)
 
     pkt->pos = orig_pos;
     if (!pkt->size)
-        av_free_packet(pkt);
+        av_packet_unref(pkt);
     return pkt->size > orig_size ? pkt->size - orig_size : ret;
 }
 
@@ -139,67 +138,6 @@ int av_filename_number_test(const char *filename)
            (av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0);
 }
 
-AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened,
-                                      int *score_max)
-{
-    AVProbeData lpd = *pd;
-    AVInputFormat *fmt1 = NULL, *fmt;
-    int score, id3 = 0;
-
-    if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) {
-        int id3len = ff_id3v2_tag_len(lpd.buf);
-        if (lpd.buf_size > id3len + 16) {
-            lpd.buf      += id3len;
-            lpd.buf_size -= id3len;
-        }
-        id3 = 1;
-    }
-
-    fmt = NULL;
-    while ((fmt1 = av_iformat_next(fmt1))) {
-        if (!is_opened == !(fmt1->flags & AVFMT_NOFILE))
-            continue;
-        score = 0;
-        if (fmt1->read_probe) {
-            score = fmt1->read_probe(&lpd);
-        } else if (fmt1->extensions) {
-            if (av_match_ext(lpd.filename, fmt1->extensions))
-                score = AVPROBE_SCORE_EXTENSION;
-        }
-        if (score > *score_max) {
-            *score_max = score;
-            fmt        = fmt1;
-        } else if (score == *score_max)
-            fmt = NULL;
-    }
-
-    // A hack for files with huge id3v2 tags -- try to guess by file extension.
-    if (!fmt && is_opened && *score_max < AVPROBE_SCORE_EXTENSION / 2) {
-        while ((fmt = av_iformat_next(fmt)))
-            if (fmt->extensions &&
-                av_match_ext(lpd.filename, fmt->extensions)) {
-                *score_max = AVPROBE_SCORE_EXTENSION / 2;
-                break;
-            }
-    }
-
-    if (!fmt && id3 && *score_max < AVPROBE_SCORE_EXTENSION / 2 - 1) {
-        while ((fmt = av_iformat_next(fmt)))
-            if (fmt->extensions && av_match_ext("mp3", fmt->extensions)) {
-                *score_max = AVPROBE_SCORE_EXTENSION / 2 - 1;
-                break;
-            }
-    }
-
-    return fmt;
-}
-
-AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened)
-{
-    int score = 0;
-    return av_probe_input_format2(pd, is_opened, &score);
-}
-
 static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
                                      AVProbeData *pd, int score)
 {
@@ -241,79 +179,6 @@ static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st,
 /************************************************************/
 /* input media file */
 
-/** size of probe buffer, for guessing file type from file contents */
-#define PROBE_BUF_MIN 2048
-#define PROBE_BUF_MAX (1 << 20)
-
-int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt,
-                          const char *filename, void *logctx,
-                          unsigned int offset, unsigned int max_probe_size)
-{
-    AVProbeData pd = { filename ? filename : "" };
-    uint8_t *buf = NULL;
-    int ret = 0, probe_size;
-
-    if (!max_probe_size)
-        max_probe_size = PROBE_BUF_MAX;
-    else if (max_probe_size > PROBE_BUF_MAX)
-        max_probe_size = PROBE_BUF_MAX;
-    else if (max_probe_size < PROBE_BUF_MIN)
-        return AVERROR(EINVAL);
-
-    if (offset >= max_probe_size)
-        return AVERROR(EINVAL);
-    avio_skip(pb, offset);
-    max_probe_size -= offset;
-
-    for (probe_size = PROBE_BUF_MIN; probe_size <= max_probe_size && !*fmt;
-         probe_size = FFMIN(probe_size << 1,
-                            FFMAX(max_probe_size, probe_size + 1))) {
-        int score = probe_size < max_probe_size ? AVPROBE_SCORE_MAX / 4 : 0;
-
-        /* Read probe data. */
-        if ((ret = av_reallocp(&buf, probe_size + AVPROBE_PADDING_SIZE)) < 0)
-            return ret;
-        if ((ret = avio_read(pb, buf + pd.buf_size,
-                             probe_size - pd.buf_size)) < 0) {
-            /* Fail if error was not end of file, otherwise, lower score. */
-            if (ret != AVERROR_EOF) {
-                av_free(buf);
-                return ret;
-            }
-            score = 0;
-            ret   = 0;          /* error was end of file, nothing read */
-        }
-        pd.buf_size += ret;
-        pd.buf       = buf;
-
-        memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE);
-
-        /* Guess file format. */
-        *fmt = av_probe_input_format2(&pd, 1, &score);
-        if (*fmt) {
-            /* This can only be true in the last iteration. */
-            if (score <= AVPROBE_SCORE_MAX / 4) {
-                av_log(logctx, AV_LOG_WARNING,
-                       "Format detected only with low score of %d, "
-                       "misdetection possible!\n", score);
-            } else
-                av_log(logctx, AV_LOG_DEBUG,
-                       "Probed with size=%d and score=%d\n", probe_size, score);
-        }
-    }
-
-    if (!*fmt) {
-        av_free(buf);
-        return AVERROR_INVALIDDATA;
-    }
-
-    /* Rewind. Reuse probe buffer to avoid seeking. */
-    if ((ret = ffio_rewind_with_probe_data(pb, buf, pd.buf_size)) < 0)
-        av_free(buf);
-
-    return ret;
-}
-
 /* Open input file and probe the format if necessary. */
 static int init_input(AVFormatContext *s, const char *filename,
                       AVDictionary **options)
@@ -373,8 +238,8 @@ static int queue_attached_pictures(AVFormatContext *s)
             if (!copy.buf)
                 return AVERROR(ENOMEM);
 
-            add_to_pktbuf(&s->raw_packet_buffer, &copy,
-                          &s->raw_packet_buffer_end);
+            add_to_pktbuf(&s->internal->raw_packet_buffer, &copy,
+                          &s->internal->raw_packet_buffer_end);
         }
     return 0;
 }
@@ -442,10 +307,10 @@ int avformat_open_input(AVFormatContext **ps, const char *filename,
     if ((ret = queue_attached_pictures(s)) < 0)
         goto fail;
 
-    if (s->pb && !s->data_offset)
-        s->data_offset = avio_tell(s->pb);
+    if (s->pb && !s->internal->data_offset)
+        s->internal->data_offset = avio_tell(s->pb);
 
-    s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
+    s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
 
     if (options) {
         av_dict_free(options);
@@ -510,14 +375,14 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
     AVStream *st;
 
     for (;;) {
-        AVPacketList *pktl = s->raw_packet_buffer;
+        AVPacketList *pktl = s->internal->raw_packet_buffer;
 
         if (pktl) {
             *pkt = pktl->pkt;
             st   = s->streams[pkt->stream_index];
             if (st->codec->codec_id != AV_CODEC_ID_PROBE ||
                 !st->probe_packets ||
-                s->raw_packet_buffer_remaining_size < pkt->size) {
+                s->internal->raw_packet_buffer_remaining_size < pkt->size) {
                 AVProbeData *pd;
                 if (st->probe_packets)
                     if ((err = probe_codec(s, st, NULL)) < 0)
@@ -525,8 +390,8 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
                 pd = &st->probe_data;
                 av_freep(&pd->buf);
                 pd->buf_size = 0;
-                s->raw_packet_buffer                 = pktl->next;
-                s->raw_packet_buffer_remaining_size += pkt->size;
+                s->internal->raw_packet_buffer                 = pktl->next;
+                s->internal->raw_packet_buffer_remaining_size += pkt->size;
                 av_free(pktl);
                 return 0;
             }
@@ -548,12 +413,20 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
             continue;
         }
 
+        if (!pkt->buf) {
+            AVPacket tmp = { 0 };
+            ret = av_packet_ref(&tmp, pkt);
+            if (ret < 0)
+                return ret;
+            *pkt = tmp;
+        }
+
         if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) &&
             (pkt->flags & AV_PKT_FLAG_CORRUPT)) {
             av_log(s, AV_LOG_WARNING,
                    "Dropped corrupted packet (stream = %d)\n",
                    pkt->stream_index);
-            av_free_packet(pkt);
+            av_packet_unref(pkt);
             continue;
         }
 
@@ -578,8 +451,9 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
                       !st->probe_packets))
             return ret;
 
-        add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end);
-        s->raw_packet_buffer_remaining_size -= pkt->size;
+        add_to_pktbuf(&s->internal->raw_packet_buffer, pkt,
+                      &s->internal->raw_packet_buffer_end);
+        s->internal->raw_packet_buffer_remaining_size -= pkt->size;
 
         if ((err = probe_codec(s, st, pkt)) < 0)
             return err;
@@ -588,33 +462,14 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
 
 /**********************************************************/
 
-/**
- * Get the number of samples of an audio frame. Return -1 on error.
- */
-int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux)
-{
-    int frame_size;
-
-    /* give frame_size priority if demuxing */
-    if (!mux && enc->frame_size > 1)
-        return enc->frame_size;
-
-    if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0)
-        return frame_size;
-
-    /* Fall back on using frame_size if muxing. */
-    if (enc->frame_size > 1)
-        return enc->frame_size;
-
-    return -1;
-}
-
 /**
  * Return the frame duration in seconds. Return 0 if not available.
  */
-void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
+void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
                                AVCodecParserContext *pc, AVPacket *pkt)
 {
+    AVRational codec_framerate = s->iformat ? st->codec->framerate :
+                                              av_inv_q(st->codec->time_base);
     int frame_size;
 
     *pnum = 0;
@@ -627,9 +482,9 @@ void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
         } else if (st->time_base.num * 1000LL > st->time_base.den) {
             *pnum = st->time_base.num;
             *pden = st->time_base.den;
-        } else if (st->codec->time_base.num * 1000LL > st->codec->time_base.den) {
-            *pnum = st->codec->time_base.num;
-            *pden = st->codec->time_base.den;
+        } else if (codec_framerate.den * 1000LL > codec_framerate.num) {
+            *pnum = codec_framerate.den;
+            *pden = codec_framerate.num;
             if (pc && pc->repeat_pict) {
                 if (*pnum > INT_MAX / (1 + pc->repeat_pict))
                     *pden /= 1 + pc->repeat_pict;
@@ -644,7 +499,7 @@ void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
         }
         break;
     case AVMEDIA_TYPE_AUDIO:
-        frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0);
+        frame_size = av_get_audio_frame_duration(st->codec, pkt->size);
         if (frame_size <= 0 || st->codec->sample_rate <= 0)
             break;
         *pnum = frame_size;
@@ -669,7 +524,7 @@ static void update_initial_timestamps(AVFormatContext *s, int stream_index,
                                       int64_t dts, int64_t pts)
 {
     AVStream *st       = s->streams[stream_index];
-    AVPacketList *pktl = s->packet_buffer;
+    AVPacketList *pktl = s->internal->packet_buffer;
 
     if (st->first_dts != AV_NOPTS_VALUE ||
         dts           == AV_NOPTS_VALUE ||
@@ -699,7 +554,7 @@ static void update_initial_timestamps(AVFormatContext *s, int stream_index,
 static void update_initial_durations(AVFormatContext *s, AVStream *st,
                                      int stream_index, int duration)
 {
-    AVPacketList *pktl = s->packet_buffer;
+    AVPacketList *pktl = s->internal->packet_buffer;
     int64_t cur_dts    = 0;
 
     if (st->first_dts != AV_NOPTS_VALUE) {
@@ -713,7 +568,7 @@ static void update_initial_durations(AVFormatContext *s, AVStream *st,
                 cur_dts -= duration;
             }
         }
-        pktl          = s->packet_buffer;
+        pktl          = s->internal->packet_buffer;
         st->first_dts = cur_dts;
     } else if (st->cur_dts)
         return;
@@ -772,17 +627,17 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
     if (delay == 1 && pkt->dts == pkt->pts &&
         pkt->dts != AV_NOPTS_VALUE && presentation_delayed) {
         av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination\n");
-        pkt->dts = pkt->pts = AV_NOPTS_VALUE;
+        pkt->dts = AV_NOPTS_VALUE;
     }
 
     if (pkt->duration == 0 && st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
-        ff_compute_frame_duration(&num, &den, st, pc, pkt);
+        ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
         if (den && num) {
             pkt->duration = av_rescale_rnd(1, num * (int64_t) st->time_base.den,
                                            den * (int64_t) st->time_base.num,
                                            AV_ROUND_DOWN);
 
-            if (pkt->duration != 0 && s->packet_buffer)
+            if (pkt->duration != 0 && s->internal->packet_buffer)
                 update_initial_durations(s, st, pkt->stream_index,
                                          pkt->duration);
         }
@@ -805,7 +660,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
         pkt->pts > pkt->dts)
         presentation_delayed = 1;
 
-    av_dlog(NULL,
+    av_log(NULL, AV_LOG_TRACE,
             "IN delayed:%d pts:%"PRId64", dts:%"PRId64" "
             "cur_dts:%"PRId64" st:%d pc:%p\n",
             presentation_delayed, pkt->pts, pkt->dts, st->cur_dts,
@@ -839,13 +694,13 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
                    st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
             int duration = pkt->duration;
             if (!duration && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
-                ff_compute_frame_duration(&num, &den, st, pc, pkt);
+                ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
                 if (den && num) {
                     duration = av_rescale_rnd(1,
                                               num * (int64_t) st->time_base.den,
                                               den * (int64_t) st->time_base.num,
                                               AV_ROUND_DOWN);
-                    if (duration != 0 && s->packet_buffer)
+                    if (duration != 0 && s->internal->packet_buffer)
                         update_initial_durations(s, st, pkt->stream_index,
                                                  duration);
                 }
@@ -881,15 +736,19 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
             st->cur_dts = pkt->dts;
     }
 
-    av_dlog(NULL,
+    av_log(NULL, AV_LOG_TRACE,
             "OUTdelayed:%d/%d pts:%"PRId64", dts:%"PRId64" cur_dts:%"PRId64"\n",
             presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts);
 
     /* update flags */
     if (is_intra_only(st->codec->codec_id))
         pkt->flags |= AV_PKT_FLAG_KEY;
+#if FF_API_CONVERGENCE_DURATION
+FF_DISABLE_DEPRECATION_WARNINGS
     if (pc)
         pkt->convergence_duration = pc->convergence_duration;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
 }
 
 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
@@ -897,7 +756,7 @@ static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_en
     while (*pkt_buf) {
         AVPacketList *pktl = *pkt_buf;
         *pkt_buf = pktl->next;
-        av_free_packet(&pktl->pkt);
+        av_packet_unref(&pktl->pkt);
         av_freep(&pktl);
     }
     *pkt_buf_end = NULL;
@@ -981,18 +840,12 @@ static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
         if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
             out_pkt.buf = pkt->buf;
             pkt->buf    = NULL;
-#if FF_API_DESTRUCT_PACKET
-FF_DISABLE_DEPRECATION_WARNINGS
-            out_pkt.destruct = pkt->destruct;
-            pkt->destruct = NULL;
-FF_ENABLE_DEPRECATION_WARNINGS
-#endif
         }
         if ((ret = av_dup_packet(&out_pkt)) < 0)
             goto fail;
 
-        if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) {
-            av_free_packet(&out_pkt);
+        if (!add_to_pktbuf(&s->internal->parse_queue, &out_pkt, &s->internal->parse_queue_end)) {
+            av_packet_unref(&out_pkt);
             ret = AVERROR(ENOMEM);
             goto fail;
         }
@@ -1005,7 +858,7 @@ FF_ENABLE_DEPRECATION_WARNINGS
     }
 
 fail:
-    av_free_packet(pkt);
+    av_packet_unref(pkt);
     return ret;
 }
 
@@ -1027,10 +880,11 @@ static int read_from_packet_buffer(AVPacketList **pkt_buffer,
 static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
 {
     int ret = 0, i, got_packet = 0;
+    AVDictionary *metadata = NULL;
 
     av_init_packet(pkt);
 
-    while (!got_packet && !s->parse_queue) {
+    while (!got_packet && !s->internal->parse_queue) {
         AVStream *st;
         AVPacket cur_pkt;
 
@@ -1064,7 +918,7 @@ static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
         if (s->debug & FF_FDEBUG_TS)
             av_log(s, AV_LOG_DEBUG,
                    "ff_read_packet stream=%d, pts=%"PRId64", dts=%"PRId64", "
-                   "size=%d, duration=%d, flags=%d\n",
+                   "size=%d, duration=%"PRId64", flags=%d\n",
                    cur_pkt.stream_index, cur_pkt.pts, cur_pkt.dts,
                    cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
 
@@ -1095,17 +949,25 @@ static int read_frame_internal(AVFormatContext *s, AVPacket *pkt)
                 return ret;
         } else {
             /* free packet */
-            av_free_packet(&cur_pkt);
+            av_packet_unref(&cur_pkt);
         }
     }
 
-    if (!got_packet && s->parse_queue)
-        ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt);
+    if (!got_packet && s->internal->parse_queue)
+        ret = read_from_packet_buffer(&s->internal->parse_queue, &s->internal->parse_queue_end, pkt);
+
+    av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata);
+    if (metadata) {
+        s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
+        av_dict_copy(&s->metadata, metadata, 0);
+        av_dict_free(&metadata);
+        av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN);
+    }
 
     if (s->debug & FF_FDEBUG_TS)
         av_log(s, AV_LOG_DEBUG,
                "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", "
-               "size=%d, duration=%d, flags=%d\n",
+               "size=%d, duration=%"PRId64", flags=%d\n",
                pkt->stream_index, pkt->pts, pkt->dts,
                pkt->size, pkt->duration, pkt->flags);
 
@@ -1118,14 +980,14 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
     int eof = 0;
 
     if (!genpts)
-        return s->packet_buffer
-               ? read_from_packet_buffer(&s->packet_buffer,
-                                         &s->packet_buffer_end, pkt)
+        return s->internal->packet_buffer
+               ? read_from_packet_buffer(&s->internal->packet_buffer,
+                                         &s->internal->packet_buffer_end, pkt)
                : read_frame_internal(s, pkt);
 
     for (;;) {
         int ret;
-        AVPacketList *pktl = s->packet_buffer;
+        AVPacketList *pktl = s->internal->packet_buffer;
 
         if (pktl) {
             AVPacket *next_pkt = &pktl->pkt;
@@ -1141,14 +1003,14 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
                     }
                     pktl = pktl->next;
                 }
-                pktl = s->packet_buffer;
+                pktl = s->internal->packet_buffer;
             }
 
             /* read packet from packet buffer, if there is data */
             if (!(next_pkt->pts == AV_NOPTS_VALUE &&
                   next_pkt->dts != AV_NOPTS_VALUE && !eof))
-                return read_from_packet_buffer(&s->packet_buffer,
-                                               &s->packet_buffer_end, pkt);
+                return read_from_packet_buffer(&s->internal->packet_buffer,
+                                               &s->internal->packet_buffer_end, pkt);
         }
 
         ret = read_frame_internal(s, pkt);
@@ -1160,8 +1022,8 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
                 return ret;
         }
 
-        if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt,
-                                        &s->packet_buffer_end)) < 0)
+        if (av_dup_packet(add_to_pktbuf(&s->internal->packet_buffer, pkt,
+                                        &s->internal->packet_buffer_end)) < 0)
             return AVERROR(ENOMEM);
     }
 }
@@ -1169,11 +1031,11 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
 /* XXX: suppress the packet queue */
 static void flush_packet_queue(AVFormatContext *s)
 {
-    free_packet_buffer(&s->parse_queue,       &s->parse_queue_end);
-    free_packet_buffer(&s->packet_buffer,     &s->packet_buffer_end);
-    free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
+    free_packet_buffer(&s->internal->parse_queue,       &s->internal->parse_queue_end);
+    free_packet_buffer(&s->internal->packet_buffer,     &s->internal->packet_buffer_end);
+    free_packet_buffer(&s->internal->raw_packet_buffer, &s->internal->raw_packet_buffer_end);
 
-    s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
+    s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
 }
 
 /*******************************************************/
@@ -1364,7 +1226,7 @@ int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
     if (stream_index < 0)
         return -1;
 
-    av_dlog(s, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
+    av_log(s, AV_LOG_TRACE, "read_seek: %d %"PRId64"\n", stream_index, target_ts);
 
     ts_max =
     ts_min = AV_NOPTS_VALUE;
@@ -1384,7 +1246,7 @@ int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
         if (e->timestamp <= target_ts || e->pos == e->min_distance) {
             pos_min = e->pos;
             ts_min  = e->timestamp;
-            av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
+            av_log(s, AV_LOG_TRACE, "using cached pos_min=0x%"PRIx64" dts_min=%"PRId64"\n",
                     pos_min, ts_min);
         } else {
             assert(index == 0);
@@ -1399,7 +1261,7 @@ int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
             pos_max   = e->pos;
             ts_max    = e->timestamp;
             pos_limit = pos_max - e->min_distance;
-            av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
+            av_log(s, AV_LOG_TRACE, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64
                     " dts_max=%"PRId64"\n", pos_max, pos_limit, ts_max);
         }
     }
@@ -1429,10 +1291,10 @@ int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
     int64_t start_pos, filesize;
     int no_change;
 
-    av_dlog(s, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
+    av_log(s, AV_LOG_TRACE, "gen_seek: %d %"PRId64"\n", stream_index, target_ts);
 
     if (ts_min == AV_NOPTS_VALUE) {
-        pos_min = s->data_offset;
+        pos_min = s->internal->data_offset;
         ts_min  = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
         if (ts_min == AV_NOPTS_VALUE)
             return -1;
@@ -1472,7 +1334,7 @@ int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
 
     no_change = 0;
     while (pos_min < pos_limit) {
-        av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64
+        av_log(s, AV_LOG_TRACE, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%"PRId64
                 " dts_max=%"PRId64"\n", pos_min, pos_max, ts_min, ts_max);
         assert(pos_limit <= pos_max);
 
@@ -1502,7 +1364,7 @@ int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
             no_change++;
         else
             no_change = 0;
-        av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64
+        av_log(s, AV_LOG_TRACE, "%"PRId64" %"PRId64" %"PRId64" / %"PRId64" %"PRId64" %"PRId64
                 " target:%"PRId64" limit:%"PRId64" start:%"PRId64" noc:%d\n",
                 pos_min, pos, pos_max, ts_min, ts, ts_max, target_ts,
                 pos_limit, start_pos, no_change);
@@ -1528,7 +1390,7 @@ int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts,
     ts_min  = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
     pos_min++;
     ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX);
-    av_dlog(s, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
+    av_log(s, AV_LOG_TRACE, "pos=0x%"PRIx64" %"PRId64"<=%"PRId64"<=%"PRId64"\n",
             pos, ts_min, target_ts, ts_max);
     *ts_ret = ts;
     return pos;
@@ -1539,7 +1401,7 @@ static int seek_frame_byte(AVFormatContext *s, int stream_index,
 {
     int64_t pos_min, pos_max;
 
-    pos_min = s->data_offset;
+    pos_min = s->internal->data_offset;
     pos_max = avio_size(s->pb) - 1;
 
     if (pos < pos_min)
@@ -1578,7 +1440,7 @@ static int seek_frame_generic(AVFormatContext *s, int stream_index,
                 return ret;
             ff_update_cur_dts(s, st, ie->timestamp);
         } else {
-            if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0)
+            if ((ret = avio_seek(s->pb, s->internal->data_offset, SEEK_SET)) < 0)
                 return ret;
         }
         for (;;) {
@@ -1588,7 +1450,7 @@ static int seek_frame_generic(AVFormatContext *s, int stream_index,
             } while (read_status == AVERROR(EAGAIN));
             if (read_status < 0)
                 break;
-            av_free_packet(&pkt);
+            av_packet_unref(&pkt);
             if (stream_index == pkt.stream_index)
                 if ((pkt.flags & AV_PKT_FLAG_KEY) && pkt.dts > timestamp)
                     break;
@@ -1890,7 +1752,7 @@ static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
                         st->duration = duration;
                 }
             }
-            av_free_packet(pkt);
+            av_packet_unref(pkt);
         }
     } while (end_time == AV_NOPTS_VALUE &&
              filesize > (DURATION_MAX_READ_SIZE << retry) &&
@@ -1940,11 +1802,11 @@ static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
         AVStream av_unused *st;
         for (i = 0; i < ic->nb_streams; i++) {
             st = ic->streams[i];
-            av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i,
+            av_log(ic, AV_LOG_TRACE, "%d: start_time: %0.3f duration: %0.3f\n", i,
                     (double) st->start_time / AV_TIME_BASE,
                     (double) st->duration   / AV_TIME_BASE);
         }
-        av_dlog(ic,
+        av_log(ic, AV_LOG_TRACE,
                 "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n",
                 (double) ic->start_time / AV_TIME_BASE,
                 (double) ic->duration   / AV_TIME_BASE,
@@ -2029,7 +1891,7 @@ static int try_decode_frame(AVStream *st, AVPacket *avpkt,
            ret >= 0 &&
            (!has_codec_parameters(st) || !has_decode_delay_been_guessed(st) ||
             (!st->codec_info_nb_frames &&
-             st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) {
+             (st->codec->codec->capabilities & AV_CODEC_CAP_CHANNEL_CONF)))) {
         got_picture = 0;
         switch (st->codec->codec_type) {
         case AVMEDIA_TYPE_VIDEO:
@@ -2255,6 +2117,7 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
                 !st->codec->extradata)
                 break;
             if (st->first_dts == AV_NOPTS_VALUE &&
+                st->codec_info_nb_frames < ic->max_ts_probe &&
                 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
                  st->codec->codec_type == AVMEDIA_TYPE_AUDIO))
                 break;
@@ -2321,8 +2184,8 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
         if (ic->flags & AVFMT_FLAG_NOBUFFER) {
             pkt = &pkt1;
         } else {
-            pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1,
-                                &ic->packet_buffer_end);
+            pkt = add_to_pktbuf(&ic->internal->packet_buffer, &pkt1,
+                                &ic->internal->packet_buffer_end);
             if ((ret = av_dup_packet(pkt)) < 0)
                 goto find_stream_info_err;
         }
@@ -2374,6 +2237,8 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
                              AV_TIME_BASE_Q) >= ic->max_analyze_duration) {
                 av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached\n",
                        ic->max_analyze_duration);
+                if (ic->flags & AVFMT_FLAG_NOBUFFER)
+                    av_packet_unref(pkt);
                 break;
             }
         }
@@ -2382,7 +2247,7 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
             if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) {
                 st->codec->extradata_size = i;
                 st->codec->extradata = av_mallocz(st->codec->extradata_size +
-                                                  FF_INPUT_BUFFER_PADDING_SIZE);
+                                                  AV_INPUT_BUFFER_PADDING_SIZE);
                 if (!st->codec->extradata)
                     return AVERROR(ENOMEM);
                 memcpy(st->codec->extradata, pkt->data,
@@ -2395,13 +2260,16 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
          * it takes longer and uses more memory. For MPEG-4, we need to
          * decompress for QuickTime.
          *
-         * If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
+         * If AV_CODEC_CAP_CHANNEL_CONF is set this will force decoding of at
          * least one frame of codec data, this makes sure the codec initializes
          * the channel configuration and does not only trust the values from
          * the container. */
         try_decode_frame(st, pkt,
                          (options && i < orig_nb_streams) ? &options[i] : NULL);
 
+        if (ic->flags & AVFMT_FLAG_NOBUFFER)
+            av_packet_unref(pkt);
+
         st->codec_info_nb_frames++;
         count++;
     }
@@ -2573,6 +2441,9 @@ void avformat_free_context(AVFormatContext *s)
     int i, j;
     AVStream *st;
 
+    if (!s)
+        return;
+
     av_opt_free(s);
     if (s->iformat && s->iformat->priv_class && s->priv_data)
         av_opt_free(s->priv_data);
@@ -2590,7 +2461,7 @@ void avformat_free_context(AVFormatContext *s)
             av_parser_close(st->parser);
         }
         if (st->attached_pic.data)
-            av_free_packet(&st->attached_pic);
+            av_packet_unref(&st->attached_pic);
         av_dict_free(&st->metadata);
         av_freep(&st->probe_data.buf);
         av_free(st->index_entries);
@@ -2661,6 +2532,11 @@ AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c)
     }
 
     st->codec = avcodec_alloc_context3(c);
+    if (!st->codec) {
+        av_free(st->info);
+        av_free(st);
+        return NULL;
+    }
     if (s->iformat) {
         /* no default bitrate if decoding */
         st->codec->bit_rate = 0;
@@ -2698,7 +2574,7 @@ AVProgram *av_new_program(AVFormatContext *ac, int id)
     AVProgram *program = NULL;
     int i;
 
-    av_dlog(ac, "new_program: id=0x%04x\n", id);
+    av_log(ac, AV_LOG_TRACE, "new_program: id=0x%04x\n", id);
 
     for (i = 0; i < ac->nb_programs; i++)
         if (ac->programs[i]->id == id)
@@ -3032,24 +2908,17 @@ int ff_find_stream_index(AVFormatContext *s, int id)
 
 int64_t ff_iso8601_to_unix_time(const char *datestr)
 {
-#if HAVE_STRPTIME
     struct tm time1 = { 0 }, time2 = { 0 };
-    char *ret1, *ret2;
-    ret1 = strptime(datestr, "%Y - %m - %d %T", &time1);
-    ret2 = strptime(datestr, "%Y - %m - %dT%T", &time2);
+    const char *ret1, *ret2;
+    ret1 = av_small_strptime(datestr, "%Y - %m - %d %T", &time1);
+    ret2 = av_small_strptime(datestr, "%Y - %m - %dT%T", &time2);
     if (ret2 && !ret1)
         return av_timegm(&time2);
     else
         return av_timegm(&time1);
-#else
-    av_log(NULL, AV_LOG_WARNING,
-           "strptime() unavailable on this system, cannot convert "
-           "the date string.\n");
-    return 0;
-#endif
 }
 
-int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id,
+int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id,
                          int std_compliance)
 {
     if (ofmt) {
@@ -3220,7 +3089,7 @@ int ff_generate_avci_extradata(AVStream *st)
 
     av_freep(&st->codec->extradata);
     st->codec->extradata_size = 0;
-    st->codec->extradata      = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
+    st->codec->extradata      = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE);
     if (!st->codec->extradata)
         return AVERROR(ENOMEM);
 
@@ -3244,3 +3113,40 @@ uint8_t *av_stream_get_side_data(AVStream *st, enum AVPacketSideDataType type,
     }
     return NULL;
 }
+
+uint8_t *ff_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type,
+                                 int size)
+{
+    AVPacketSideData *sd, *tmp;
+    int i;
+    uint8_t *data = av_malloc(size);
+
+    if (!data)
+        return NULL;
+
+    for (i = 0; i < st->nb_side_data; i++) {
+        sd = &st->side_data[i];
+
+        if (sd->type == type) {
+            av_freep(&sd->data);
+            sd->data = data;
+            sd->size = size;
+            return sd->data;
+        }
+    }
+
+    tmp = av_realloc_array(st->side_data, st->nb_side_data + 1, sizeof(*tmp));
+    if (!tmp) {
+        av_freep(&data);
+        return NULL;
+    }
+
+    st->side_data = tmp;
+    st->nb_side_data++;
+
+    sd = &st->side_data[st->nb_side_data - 1];
+    sd->type = type;
+    sd->data = data;
+    sd->size = size;
+    return data;
+}