1 files changed, 91 insertions, 15 deletions

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 9e879940a9..b61f9b70ea 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -3,20 +3,20 @@
  * Copyright (c) 2001 Fabrice Bellard
  * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
  *
- * This file is part of Libav.
+ * This file is part of FFmpeg.
  *
- * Libav is free software; you can redistribute it and/or
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
@@ -343,9 +343,18 @@ int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
     }
     s->internal_buffer_count++;
 
-    if(s->pkt) pic->pkt_pts= s->pkt->pts;
-    else       pic->pkt_pts= AV_NOPTS_VALUE;
+    if (s->pkt) {
+        pic->pkt_pts = s->pkt->pts;
+        pic->pkt_pos = s->pkt->pos;
+    } else {
+        pic->pkt_pts = AV_NOPTS_VALUE;
+        pic->pkt_pos = -1;
+    }
     pic->reordered_opaque= s->reordered_opaque;
+    pic->sample_aspect_ratio = s->sample_aspect_ratio;
+    pic->width               = s->width;
+    pic->height              = s->height;
+    pic->format              = s->pix_fmt;
 
     if(s->debug&FF_DEBUG_BUFFERS)
         av_log(s, AV_LOG_DEBUG, "default_get_buffer called on pic %p, %d buffers used\n", pic, s->internal_buffer_count);
@@ -360,6 +369,7 @@ void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
     assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
     assert(s->internal_buffer_count);
 
+    if(s->internal_buffer){
     buf = NULL; /* avoids warning */
     for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
         buf= &((InternalBuffer*)s->internal_buffer)[i];
@@ -371,6 +381,7 @@ void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
     last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
 
     FFSWAP(InternalBuffer, *buf, *last);
+    }
 
     for(i=0; i<4; i++){
         pic->data[i]=NULL;
@@ -447,8 +458,11 @@ enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum
 void avcodec_get_frame_defaults(AVFrame *pic){
     memset(pic, 0, sizeof(AVFrame));
 
-    pic->pts= AV_NOPTS_VALUE;
+    pic->pts = pic->best_effort_timestamp = AV_NOPTS_VALUE;
+    pic->pkt_pos = -1;
     pic->key_frame= 1;
+    pic->sample_aspect_ratio = (AVRational){0, 1};
+    pic->format = -1;           /* unknown */
 }
 
 AVFrame *avcodec_alloc_frame(void){
@@ -461,6 +475,12 @@ AVFrame *avcodec_alloc_frame(void){
     return pic;
 }
 
+static void avcodec_get_subtitle_defaults(AVSubtitle *sub)
+{
+    memset(sub, 0, sizeof(*sub));
+    sub->pts = AV_NOPTS_VALUE;
+}
+
 int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
 {
     int ret = 0;
@@ -596,12 +616,19 @@ int attribute_align_arg avcodec_open(AVCodecContext *avctx, AVCodec *codec)
         }
     }
 
+    avctx->pts_correction_num_faulty_pts =
+    avctx->pts_correction_num_faulty_dts = 0;
+    avctx->pts_correction_last_pts =
+    avctx->pts_correction_last_dts = INT64_MIN;
+
     if(avctx->codec->init && !(avctx->active_thread_type&FF_THREAD_FRAME)){
         ret = avctx->codec->init(avctx);
         if (ret < 0) {
             goto free_and_end;
         }
     }
+
+    ret=0;
 end:
     entangled_thread_counter--;
 
@@ -658,13 +685,44 @@ int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
         av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
         return -1;
     }
-    if(sub->num_rects == 0 || !sub->rects)
-        return -1;
+
     ret = avctx->codec->encode(avctx, buf, buf_size, sub);
     avctx->frame_number++;
     return ret;
 }
 
+/**
+ * Attempt to guess proper monotonic timestamps for decoded video frames
+ * which might have incorrect times. Input timestamps may wrap around, in
+ * which case the output will as well.
+ *
+ * @param pts the pts field of the decoded AVPacket, as passed through
+ * AVFrame.pkt_pts
+ * @param dts the dts field of the decoded AVPacket
+ * @return one of the input values, may be AV_NOPTS_VALUE
+ */
+static int64_t guess_correct_pts(AVCodecContext *ctx,
+                                 int64_t reordered_pts, int64_t dts)
+{
+    int64_t pts = AV_NOPTS_VALUE;
+
+    if (dts != AV_NOPTS_VALUE) {
+        ctx->pts_correction_num_faulty_dts += dts <= ctx->pts_correction_last_dts;
+        ctx->pts_correction_last_dts = dts;
+    }
+    if (reordered_pts != AV_NOPTS_VALUE) {
+        ctx->pts_correction_num_faulty_pts += reordered_pts <= ctx->pts_correction_last_pts;
+        ctx->pts_correction_last_pts = reordered_pts;
+    }
+    if ((ctx->pts_correction_num_faulty_pts<=ctx->pts_correction_num_faulty_dts || dts == AV_NOPTS_VALUE)
+       && reordered_pts != AV_NOPTS_VALUE)
+        pts = reordered_pts;
+    else
+        pts = dts;
+
+    return pts;
+}
+
 int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture,
                          int *got_picture_ptr,
                          AVPacket *avpkt)
@@ -685,12 +743,29 @@ int attribute_align_arg avcodec_decode_video2(AVCodecContext *avctx, AVFrame *pi
             ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
                               avpkt);
             picture->pkt_dts= avpkt->dts;
+
+            if(!avctx->has_b_frames){
+            picture->pkt_pos= avpkt->pos;
+            if (!picture->sample_aspect_ratio.num)
+                picture->sample_aspect_ratio = avctx->sample_aspect_ratio;
+            if (!picture->width)
+                picture->width = avctx->width;
+            if (!picture->height)
+                picture->height = avctx->height;
+            if (picture->format == PIX_FMT_NONE)
+                picture->format = avctx->pix_fmt;
+            }
         }
 
         emms_c(); //needed to avoid an emms_c() call before every return;
 
-        if (*got_picture_ptr)
+
+        if (*got_picture_ptr){
             avctx->frame_number++;
+            picture->best_effort_timestamp = guess_correct_pts(avctx,
+                                                            picture->pkt_pts,
+                                                            picture->pkt_dts);
+        }
     }else
         ret= 0;
 
@@ -734,6 +809,7 @@ int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub,
 
     avctx->pkt = avpkt;
     *got_sub_ptr = 0;
+    avcodec_get_subtitle_defaults(sub);
     ret = avctx->codec->decode(avctx, sub, got_sub_ptr, avpkt);
     if (*got_sub_ptr)
         avctx->frame_number++;
@@ -1025,13 +1101,13 @@ unsigned avcodec_version( void )
 
 const char *avcodec_configuration(void)
 {
-    return LIBAV_CONFIGURATION;
+    return FFMPEG_CONFIGURATION;
 }
 
 const char *avcodec_license(void)
 {
 #define LICENSE_PREFIX "libavcodec license: "
-    return LICENSE_PREFIX LIBAV_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
 }
 
 void avcodec_init(void)
@@ -1158,7 +1234,7 @@ int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b){
 
 void av_log_missing_feature(void *avc, const char *feature, int want_sample)
 {
-    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your Libav "
+    av_log(avc, AV_LOG_WARNING, "%s not implemented. Update your FFmpeg "
             "version to the newest one from Git. If the problem still "
             "occurs, it means that your file has a feature which has not "
             "been implemented.\n", feature);
@@ -1175,8 +1251,8 @@ void av_log_ask_for_sample(void *avc, const char *msg, ...)
     if (msg)
         av_vlog(avc, AV_LOG_WARNING, msg, argument_list);
     av_log(avc, AV_LOG_WARNING, "If you want to help, upload a sample "
-            "of this file to ftp://upload.libav.org/incoming/ "
-            "and contact the libav-devel mailing list.\n");
+            "of this file to ftp://upload.ffmpeg.org/MPlayer/incoming/ "
+            "and contact the ffmpeg-devel mailing list.\n");
 
     va_end(argument_list);
 }