X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fmpegvideo_parser.c;h=d657818911038ae0c956904e1f624235397480c8;hb=3a651f599a18b023602370b67a77eb0efa309b20;hp=9688e1862548c7394f54083ca050e254ee656253;hpb=e65ab9d94f1c8d8893e32d90467d9525625d306a;p=ffmpeg

diff --git a/libavcodec/mpegvideo_parser.c b/libavcodec/mpegvideo_parser.c
index 9688e186254..d6578189110 100644
--- a/libavcodec/mpegvideo_parser.c
+++ b/libavcodec/mpegvideo_parser.c
@@ -21,13 +21,22 @@
  */
 
 #include "parser.h"
-#include "mpegvideo.h"
+#include "mpeg12.h"
+#include "internal.h"
+
+struct MpvParseContext {
+    ParseContext pc;
+    AVRational frame_rate;
+    int progressive_sequence;
+    int width, height;
+};
+
 
 static void mpegvideo_extract_headers(AVCodecParserContext *s,
                                       AVCodecContext *avctx,
                                       const uint8_t *buf, int buf_size)
 {
-    ParseContext1 *pc = s->priv_data;
+    struct MpvParseContext *pc = s->priv_data;
     const uint8_t *buf_end = buf + buf_size;
     uint32_t start_code;
     int frame_rate_index, ext_type, bytes_left;
@@ -40,7 +49,7 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
 
     while (buf < buf_end) {
         start_code= -1;
-        buf= ff_find_start_code(buf, buf_end, &start_code);
+        buf= avpriv_find_start_code(buf, buf_end, &start_code);
         bytes_left = buf_end - buf;
         switch(start_code) {
         case PICTURE_START_CODE:
@@ -53,15 +62,13 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
                 pc->width  = (buf[0] << 4) | (buf[1] >> 4);
                 pc->height = ((buf[1] & 0x0f) << 8) | buf[2];
                 if(!avctx->width || !avctx->height || !avctx->coded_width || !avctx->coded_height){
-                    avcodec_set_dimensions(avctx, pc->width, pc->height);
+                    ff_set_dimensions(avctx, pc->width, pc->height);
                     did_set_size=1;
                 }
                 frame_rate_index = buf[3] & 0xf;
-                pc->frame_rate.den = avctx->time_base.den = ff_frame_rate_tab[frame_rate_index].num;
-                pc->frame_rate.num = avctx->time_base.num = ff_frame_rate_tab[frame_rate_index].den;
+                pc->frame_rate = avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_index];
                 avctx->bit_rate = ((buf[4]<<10) | (buf[5]<<2) | (buf[6]>>6))*400;
-                avctx->codec_id = CODEC_ID_MPEG1VIDEO;
-                avctx->sub_id = 1;
+                avctx->codec_id = AV_CODEC_ID_MPEG1VIDEO;
             }
             break;
         case EXT_START_CODE:
@@ -82,11 +89,10 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
                         pc->height |=( vert_size_ext << 12);
                         avctx->bit_rate += (bit_rate_ext << 18) * 400;
                         if(did_set_size)
-                            avcodec_set_dimensions(avctx, pc->width, pc->height);
-                        avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1) * 2;
-                        avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1);
-                        avctx->codec_id = CODEC_ID_MPEG2VIDEO;
-                        avctx->sub_id = 2; /* forces MPEG2 */
+                            ff_set_dimensions(avctx, pc->width, pc->height);
+                        avctx->framerate.num = pc->frame_rate.num * (frame_rate_ext_n + 1) * 2;
+                        avctx->framerate.den = pc->frame_rate.den * (frame_rate_ext_d + 1);
+                        avctx->codec_id = AV_CODEC_ID_MPEG2VIDEO;
                     }
                     break;
                 case 0x8: /* picture coding extension */
@@ -107,6 +113,14 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
                                 s->repeat_pict = 2;
                             }
                         }
+
+                        if (!pc->progressive_sequence) {
+                            if (top_field_first)
+                                s->field_order = AV_FIELD_TT;
+                            else
+                                s->field_order = AV_FIELD_BB;
+                        } else
+                            s->field_order = AV_FIELD_PROGRESSIVE;
                     }
                     break;
                 }
@@ -124,6 +138,10 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
         }
     }
  the_end: ;
+#if FF_API_AVCTX_TIMEBASE
+    if (avctx->framerate.num)
+        avctx->time_base = av_inv_q(avctx->framerate);
+#endif
 }
 
 static int mpegvideo_parse(AVCodecParserContext *s,
@@ -131,7 +149,7 @@ static int mpegvideo_parse(AVCodecParserContext *s,
                            const uint8_t **poutbuf, int *poutbuf_size,
                            const uint8_t *buf, int buf_size)
 {
-    ParseContext1 *pc1 = s->priv_data;
+    struct MpvParseContext *pc1 = s->priv_data;
     ParseContext *pc= &pc1->pc;
     int next;
 
@@ -174,10 +192,9 @@ static int mpegvideo_split(AVCodecContext *avctx,
 }
 
 AVCodecParser ff_mpegvideo_parser = {
-    { CODEC_ID_MPEG1VIDEO, CODEC_ID_MPEG2VIDEO },
-    sizeof(ParseContext1),
-    NULL,
-    mpegvideo_parse,
-    ff_parse1_close,
-    mpegvideo_split,
+    .codec_ids      = { AV_CODEC_ID_MPEG1VIDEO, AV_CODEC_ID_MPEG2VIDEO },
+    .priv_data_size = sizeof(struct MpvParseContext),
+    .parser_parse   = mpegvideo_parse,
+    .parser_close   = ff_parse_close,
+    .split          = mpegvideo_split,
 };