code.vuplus.com Git - vuplus_xbmc/blob - lib/xbmc-dll-symbols/DllAvFormat.c

   1 /*
   2  * various utility functions used within FFmpeg
   3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
   4  *
   5  * FFmpeg is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * FFmpeg is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with FFmpeg; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 /* Functions defined here are functions that cannot be resolved through the
  21  * ffmpeg shared libraries, yet are used in XBMC.
  22  */
  23
  24 #if (defined HAVE_CONFIG_H) && (!defined WIN32)
  25   #include "config.h"
  26 #endif
  27 #if (defined USE_EXTERNAL_FFMPEG)
  28 #include <libavformat/avformat.h>
  29
  30 /* Taken from libavformat/utils.c */
  31 #if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(54,0,0)
  32 static void flush_packet_queue(AVFormatContext *s)
  33 {
  34     AVPacketList *pktl;
  35
  36     for(;;) {
  37         pktl = s->packet_buffer;
  38         if (!pktl)
  39             break;
  40         s->packet_buffer = pktl->next;
  41         av_free_packet(&pktl->pkt);
  42         av_free(pktl);
  43     }
  44     while(s->raw_packet_buffer){
  45         pktl = s->raw_packet_buffer;
  46         s->raw_packet_buffer = pktl->next;
  47         av_free_packet(&pktl->pkt);
  48         av_free(pktl);
  49     }
  50     s->packet_buffer_end=
  51     s->raw_packet_buffer_end= NULL;
  52 #ifdef RAW_PACKET_BUFFER_SIZE
  53     // Added on: 2009-06-25
  54     s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
  55 #endif
  56 }
  57 #else
  58 static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end)
  59 {
  60     while (*pkt_buf) {
  61         AVPacketList *pktl = *pkt_buf;
  62         *pkt_buf = pktl->next;
  63         av_free_packet(&pktl->pkt);
  64         av_freep(&pktl);
  65     }
  66     *pkt_buf_end = NULL;
  67 }
  68 /* XXX: suppress the packet queue */
  69 static void flush_packet_queue(AVFormatContext *s)
  70 {
  71     free_packet_buffer(&s->parse_queue,       &s->parse_queue_end);
  72     free_packet_buffer(&s->packet_buffer,     &s->packet_buffer_end);
  73     free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end);
  74
  75     s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE;
  76 }
  77 #endif
  78
  79 /* Taken from libavformat/utils.c
  80  * Original name is ff_read_frame_flush
  81  * */
  82 void xbmc_read_frame_flush(AVFormatContext *s)
  83 {
  84     AVStream *st;
  85     int i, j;
  86
  87     flush_packet_queue(s);
  88
  89 #if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(54,0,0)
  90     s->cur_st = NULL;
  91 #endif
  92
  93     /* for each stream, reset read state */
  94     for(i = 0; i < s->nb_streams; i++) {
  95         st = s->streams[i];
  96
  97         if (st->parser) {
  98             av_parser_close(st->parser);
  99             st->parser = NULL;
 100 #if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(54,0,0)
 101             av_free_packet(&st->cur_pkt);
 102 #endif
 103         }
 104         st->last_IP_pts = AV_NOPTS_VALUE;
 105 #if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(54,0,0)
 106         st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
 107         st->reference_dts = AV_NOPTS_VALUE;
 108         /* fail safe */
 109         st->cur_ptr = NULL;
 110         st->cur_len = 0;
 111 #else
 112 #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48))
 113         if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE;
 114         else                                st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */
 115 #if LIBAVFORMAT_VERSION_INT < AV_VERSION_INT(55,0,0)
 116         st->reference_dts = AV_NOPTS_VALUE;
 117 #endif
 118
 119         st->probe_packets = MAX_PROBE_PACKETS;
 120 #endif
 121
 122         for(j=0; j<MAX_REORDER_DELAY+1; j++)
 123             st->pts_buffer[j]= AV_NOPTS_VALUE;
 124     }
 125 }
 126 #endif /* (defined USE_EXTERNAL_FFMPEG) */