---
 libavformat/internal.h |   6 +++
 libavformat/utils.c    | 132 ++++++++++++++++++++++++++++++++++---------------
 2 files changed, 98 insertions(+), 40 deletions(-)

diff --git a/libavformat/internal.h b/libavformat/internal.h
index d4fb448..ec40f10 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -110,6 +110,12 @@ struct AVStreamInternal {
      * 1 if avctx has been initialized with the values from the codec 
parameters
      */
     int avctx_inited;
+
+#if FF_API_LAVF_AVCTX
+    // whether the deprecated stream codec context needs
+    // to be filled from the codec parameters
+    int need_codec_update;
+#endif
 };
 
 void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 50ca1db..e8cd9bb 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -167,8 +167,14 @@ static int set_codec_from_probe_data(AVFormatContext *s, 
AVStream *st,
                fmt->name, score);
         for (i = 0; fmt_id_type[i].name; i++) {
             if (!strcmp(fmt->name, fmt_id_type[i].name)) {
-                st->codec->codec_id   = fmt_id_type[i].id;
-                st->codec->codec_type = fmt_id_type[i].type;
+                st->codecpar->codec_id   = fmt_id_type[i].id;
+                st->codecpar->codec_type = fmt_id_type[i].type;
+#if FF_API_LAVF_AVCTX
+FF_DISABLE_DEPRECATION_WARNINGS
+                st->codec->codec_type = st->codecpar->codec_type;
+                st->codec->codec_id   = st->codecpar->codec_id;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
                 break;
             }
         }
@@ -253,6 +259,28 @@ static int queue_attached_pictures(AVFormatContext *s)
     return 0;
 }
 
+#if FF_API_LAVF_AVCTX
+FF_DISABLE_DEPRECATION_WARNINGS
+static int update_stream_avctx(AVFormatContext *s)
+{
+    int i, ret;
+    for (i = 0; i < s->nb_streams; i++) {
+        AVStream *st = s->streams[i];
+
+        if (!st->internal->need_codec_update)
+            continue;
+
+        ret = avcodec_parameters_to_context(st->codec, st->codecpar);
+        if (ret < 0)
+            return ret;
+
+        st->internal->need_codec_update = 0;
+    }
+    return 0;
+}
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
+
 int avformat_open_input(AVFormatContext **ps, const char *filename,
                         AVInputFormat *fmt, AVDictionary **options)
 {
@@ -321,6 +349,10 @@ int avformat_open_input(AVFormatContext **ps, const char 
*filename,
 
     s->internal->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
 
+#if FF_API_LAVF_AVCTX
+    update_stream_avctx(s);
+#endif
+
     if (options) {
         av_dict_free(options);
         *options = tmp;
@@ -342,7 +374,7 @@ fail:
 
 static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt)
 {
-    if (st->codec->codec_id == AV_CODEC_ID_PROBE) {
+    if (st->codecpar->codec_id == AV_CODEC_ID_PROBE) {
         AVProbeData *pd = &st->probe_data;
         av_log(s, AV_LOG_DEBUG, "probing stream %d\n", st->index);
         --st->probe_packets;
@@ -368,7 +400,7 @@ static int probe_codec(AVFormatContext *s, AVStream *st, 
const AVPacket *pkt)
             av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) {
             set_codec_from_probe_data(s, st, pd, st->probe_packets > 0
                                                  ? AVPROBE_SCORE_MAX / 4 : 0);
-            if (st->codec->codec_id != AV_CODEC_ID_PROBE) {
+            if (st->codecpar->codec_id != AV_CODEC_ID_PROBE) {
                 pd->buf_size = 0;
                 av_freep(&pd->buf);
                 av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index);
@@ -389,7 +421,7 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
         if (pktl) {
             *pkt = pktl->pkt;
             st   = s->streams[pkt->stream_index];
-            if (st->codec->codec_id != AV_CODEC_ID_PROBE ||
+            if (st->codecpar->codec_id != AV_CODEC_ID_PROBE ||
                 !st->probe_packets ||
                 s->internal->raw_packet_buffer_remaining_size < pkt->size) {
                 AVProbeData *pd;
@@ -441,22 +473,22 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
 
         st = s->streams[pkt->stream_index];
 
-        switch (st->codec->codec_type) {
+        switch (st->codecpar->codec_type) {
         case AVMEDIA_TYPE_VIDEO:
             if (s->video_codec_id)
-                st->codec->codec_id = s->video_codec_id;
+                st->codecpar->codec_id = s->video_codec_id;
             break;
         case AVMEDIA_TYPE_AUDIO:
             if (s->audio_codec_id)
-                st->codec->codec_id = s->audio_codec_id;
+                st->codecpar->codec_id = s->audio_codec_id;
             break;
         case AVMEDIA_TYPE_SUBTITLE:
             if (s->subtitle_codec_id)
-                st->codec->codec_id = s->subtitle_codec_id;
+                st->codecpar->codec_id = s->subtitle_codec_id;
             break;
         }
 
-        if (!pktl && (st->codec->codec_id != AV_CODEC_ID_PROBE ||
+        if (!pktl && (st->codecpar->codec_id != AV_CODEC_ID_PROBE ||
                       !st->probe_packets))
             return ret;
 
@@ -479,13 +511,13 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
 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);
+    AVRational codec_framerate = s->iformat ? st->internal->avctx->framerate :
+                                              (AVRational){ 0, 1 };
     int frame_size;
 
     *pnum = 0;
     *pden = 0;
-    switch (st->codec->codec_type) {
+    switch (st->codecpar->codec_type) {
     case AVMEDIA_TYPE_VIDEO:
         if (st->avg_frame_rate.num) {
             *pnum = st->avg_frame_rate.den;
@@ -505,16 +537,16 @@ void ff_compute_frame_duration(AVFormatContext *s, int 
*pnum, int *pden, AVStrea
             /* If this codec can be interlaced or progressive then we need
              * a parser to compute duration of a packet. Thus if we have
              * no parser in such case leave duration undefined. */
-            if (st->codec->ticks_per_frame > 1 && !pc)
+            if (st->internal->avctx->ticks_per_frame > 1 && !pc)
                 *pnum = *pden = 0;
         }
         break;
     case AVMEDIA_TYPE_AUDIO:
-        frame_size = av_get_audio_frame_duration(st->codec, pkt->size);
-        if (frame_size <= 0 || st->codec->sample_rate <= 0)
+        frame_size = av_get_audio_frame_duration2(st->codecpar, pkt->size);
+        if (frame_size <= 0 || st->codecpar->sample_rate <= 0)
             break;
         *pnum = frame_size;
-        *pden = st->codec->sample_rate;
+        *pden = st->codecpar->sample_rate;
         break;
     default:
         break;
@@ -591,10 +623,10 @@ static void update_initial_durations(AVFormatContext *s, 
AVStream *st,
             pktl->pkt.dts == AV_NOPTS_VALUE &&
             !pktl->pkt.duration) {
             pktl->pkt.dts = cur_dts;
-            if (!st->codec->has_b_frames)
+            if (!st->internal->avctx->has_b_frames)
                 pktl->pkt.pts = cur_dts;
             cur_dts += duration;
-            if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO)
+            if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO)
                 pktl->pkt.duration = duration;
         } else
             break;
@@ -616,7 +648,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream 
*st,
         pkt->dts = AV_NOPTS_VALUE;
 
     /* do we have a video B-frame ? */
-    delay = st->codec->has_b_frames;
+    delay = st->internal->avctx->has_b_frames;
     presentation_delayed = 0;
 
     /* XXX: need has_b_frame, but cannot get it if the codec is
@@ -641,7 +673,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream 
*st,
         pkt->dts = AV_NOPTS_VALUE;
     }
 
-    if (pkt->duration == 0 && st->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
+    if (pkt->duration == 0 && st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
         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,
@@ -679,7 +711,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream 
*st,
     /* Interpolate PTS and DTS if they are not present. We skip H.264
      * currently because delay and has_b_frames are not reliably set. */
     if ((delay == 0 || (delay == 1 && pc)) &&
-        st->codec->codec_id != AV_CODEC_ID_H264) {
+        st->codecpar->codec_id != AV_CODEC_ID_H264) {
         if (presentation_delayed) {
             /* DTS = decompression timestamp */
             /* PTS = presentation timestamp */
@@ -702,9 +734,9 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream 
*st,
         } else if (pkt->pts != AV_NOPTS_VALUE ||
                    pkt->dts != AV_NOPTS_VALUE ||
                    pkt->duration              ||
-                   st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+                   st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
             int duration = pkt->duration;
-            if (!duration && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
+            if (!duration && st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
                 ff_compute_frame_duration(s, &num, &den, st, pc, pkt);
                 if (den && num) {
                     duration = av_rescale_rnd(1,
@@ -740,7 +772,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream 
*st,
         if (pkt->dts == AV_NOPTS_VALUE)
             pkt->dts = st->pts_buffer[0];
         // We skipped it above so we try here.
-        if (st->codec->codec_id == AV_CODEC_ID_H264)
+        if (st->codecpar->codec_id == AV_CODEC_ID_H264)
             // This should happen on the first packet
             update_initial_timestamps(s, pkt->stream_index, pkt->dts, 
pkt->pts);
         if (pkt->dts > st->cur_dts)
@@ -752,7 +784,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream 
*st,
             presentation_delayed, delay, pkt->pts, pkt->dts, st->cur_dts);
 
     /* update flags */
-    if (is_intra_only(st->codec->codec_id))
+    if (is_intra_only(st->codecpar->codec_id))
         pkt->flags |= AV_PKT_FLAG_KEY;
 #if FF_API_CONVERGENCE_DURATION
 FF_DISABLE_DEPRECATION_WARNINGS
@@ -796,7 +828,7 @@ static int parse_packet(AVFormatContext *s, AVPacket *pkt, 
int stream_index)
         int len;
 
         av_init_packet(&out_pkt);
-        len = av_parser_parse2(st->parser, st->codec,
+        len = av_parser_parse2(st->parser, st->internal->avctx,
                                &out_pkt.data, &out_pkt.size, data, size,
                                pkt->pts, pkt->dts, pkt->pos);
 
@@ -819,11 +851,11 @@ static int parse_packet(AVFormatContext *s, AVPacket 
*pkt, int stream_index)
 
         /* set the duration */
         out_pkt.duration = 0;
-        if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
-            if (st->codec->sample_rate > 0) {
+        if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
+            if (st->internal->avctx->sample_rate > 0) {
                 out_pkt.duration =
                     av_rescale_q_rnd(st->parser->duration,
-                                     (AVRational) { 1, st->codec->sample_rate 
},
+                                     (AVRational) { 1, 
st->internal->avctx->sample_rate },
                                      st->time_base,
                                      AV_ROUND_DOWN);
             }
@@ -928,7 +960,7 @@ static int read_frame_internal(AVFormatContext *s, AVPacket 
*pkt)
                    cur_pkt.size, cur_pkt.duration, cur_pkt.flags);
 
         if (st->need_parsing && !st->parser && !(s->flags & 
AVFMT_FLAG_NOPARSE)) {
-            st->parser = av_parser_init(st->codec->codec_id);
+            st->parser = av_parser_init(st->codecpar->codec_id);
             if (!st->parser)
                 /* no parser available: just output the raw packets */
                 st->need_parsing = AVSTREAM_PARSE_NONE;
@@ -969,6 +1001,10 @@ static int read_frame_internal(AVFormatContext *s, 
AVPacket *pkt)
         av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN);
     }
 
+#if FF_API_LAVF_AVCTX
+    update_stream_avctx(s);
+#endif
+
     if (s->debug & FF_FDEBUG_TS)
         av_log(s, AV_LOG_DEBUG,
                "read_frame_internal stream=%d, pts=%"PRId64", dts=%"PRId64", "
@@ -1057,12 +1093,12 @@ int av_find_default_stream_index(AVFormatContext *s)
         return -1;
     for (i = 0; i < s->nb_streams; i++) {
         st = s->streams[i];
-        if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
+        if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
             !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
             return i;
         }
         if (first_audio_index < 0 &&
-            st->codec->codec_type == AVMEDIA_TYPE_AUDIO)
+            st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
             first_audio_index = i;
     }
     return first_audio_index >= 0 ? first_audio_index : 0;
@@ -1665,12 +1701,12 @@ static void 
estimate_timings_from_bit_rate(AVFormatContext *ic)
         int bit_rate = 0;
         for (i = 0; i < ic->nb_streams; i++) {
             st = ic->streams[i];
-            if (st->codec->bit_rate > 0) {
-                if (INT_MAX - st->codec->bit_rate < bit_rate) {
+            if (st->codecpar->bit_rate > 0) {
+                if (INT_MAX - st->codecpar->bit_rate < bit_rate) {
                     bit_rate = 0;
                     break;
                 }
-                bit_rate += st->codec->bit_rate;
+                bit_rate += st->codecpar->bit_rate;
             }
         }
         ic->bit_rate = bit_rate;
@@ -1712,7 +1748,7 @@ static void estimate_timings_from_pts(AVFormatContext 
*ic, int64_t old_offset)
     for (i = 0; i < ic->nb_streams; i++) {
         st = ic->streams[i];
         if (st->start_time == AV_NOPTS_VALUE && st->first_dts == 
AV_NOPTS_VALUE)
-            av_log(st->codec, AV_LOG_WARNING,
+            av_log(ic, AV_LOG_WARNING,
                    "start time is not set in estimate_timings_from_pts\n");
 
         if (st->parser) {
@@ -2460,8 +2496,8 @@ int av_find_best_stream(AVFormatContext *ic, enum 
AVMediaType type,
     for (i = 0; i < nb_streams; i++) {
         int real_stream_index = program ? program[i] : i;
         AVStream *st          = ic->streams[real_stream_index];
-        AVCodecContext *avctx = st->codec;
-        if (avctx->codec_type != type)
+        AVCodecParameters *par = st->codecpar;
+        if (par->codec_type != type)
             continue;
         if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb)
             continue;
@@ -2469,7 +2505,7 @@ int av_find_best_stream(AVFormatContext *ic, enum 
AVMediaType type,
                                AV_DISPOSITION_VISUAL_IMPAIRED))
             continue;
         if (decoder_ret) {
-            decoder = avcodec_find_decoder(st->codec->codec_id);
+            decoder = avcodec_find_decoder(par->codec_id);
             if (!decoder) {
                 if (ret < 0)
                     ret = AVERROR_DECODER_NOT_FOUND;
@@ -2540,9 +2576,13 @@ static void free_stream(AVStream **pst)
     avcodec_parameters_free(&st->codecpar);
     av_freep(&st->probe_data.buf);
     av_free(st->index_entries);
+#if FF_API_LAVF_AVCTX
+FF_DISABLE_DEPRECATION_WARNINGS
     av_free(st->codec->extradata);
     av_free(st->codec->subtitle_header);
     av_free(st->codec);
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
     av_free(st->priv_data);
     av_free(st->info);
 
@@ -2622,20 +2662,28 @@ AVStream *avformat_new_stream(AVFormatContext *s, const 
AVCodec *c)
         return NULL;
     }
 
+#if FF_API_LAVF_AVCTX
+FF_DISABLE_DEPRECATION_WARNINGS
     st->codec = avcodec_alloc_context3(c);
     if (!st->codec) {
         av_free(st->info);
         av_free(st);
         return NULL;
     }
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
 
     st->internal = av_mallocz(sizeof(*st->internal));
     if (!st->internal)
         goto fail;
 
     if (s->iformat) {
+#if FF_API_LAVF_AVCTX
+FF_DISABLE_DEPRECATION_WARNINGS
         /* no default bitrate if decoding */
         st->codec->bit_rate = 0;
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
 
         /* default pts setting is MPEG-like */
         avpriv_set_pts_info(st, 33, 1, 90000);
@@ -2671,6 +2719,10 @@ AVStream *avformat_new_stream(AVFormatContext *s, const 
AVCodec *c)
     st->info->fps_first_dts = AV_NOPTS_VALUE;
     st->info->fps_last_dts  = AV_NOPTS_VALUE;
 
+#if FF_API_LAVF_AVCTX
+    st->internal->need_codec_update = 1;
+#endif
+
     s->streams[s->nb_streams++] = st;
     return st;
 fail:
-- 
2.0.0

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