Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim:set ts=2 sw=2 sts=2 et cindent: */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #include "mp4_demuxer/ResourceStream.h"
       8             : 
       9             : namespace mp4_demuxer {
      10             : 
      11           0 : ResourceStream::ResourceStream(mozilla::MediaResource* aResource)
      12             :   : mResource(aResource)
      13           0 :   , mPinCount(0)
      14             : {
      15           0 :   MOZ_ASSERT(aResource);
      16           0 : }
      17             : 
      18           0 : ResourceStream::~ResourceStream()
      19             : {
      20           0 :   MOZ_ASSERT(mPinCount == 0);
      21           0 : }
      22             : 
      23             : bool
      24           0 : ResourceStream::ReadAt(int64_t aOffset, void* aBuffer, size_t aCount,
      25             :                        size_t* aBytesRead)
      26             : {
      27           0 :   uint32_t sum = 0;
      28           0 :   uint32_t bytesRead = 0;
      29           0 :   do {
      30           0 :     uint64_t offset = aOffset + sum;
      31           0 :     char* buffer = reinterpret_cast<char*>(aBuffer) + sum;
      32           0 :     uint32_t toRead = aCount - sum;
      33           0 :     nsresult rv = mResource.ReadAt(offset, buffer, toRead, &bytesRead);
      34           0 :     if (NS_FAILED(rv)) {
      35           0 :       return false;
      36             :     }
      37           0 :     sum += bytesRead;
      38           0 :   } while (sum < aCount && bytesRead > 0);
      39             : 
      40           0 :   *aBytesRead = sum;
      41           0 :   return true;
      42             : }
      43             : 
      44             : bool
      45           0 : ResourceStream::CachedReadAt(int64_t aOffset, void* aBuffer, size_t aCount,
      46             :                         size_t* aBytesRead)
      47             : {
      48           0 :   nsresult rv = mResource.GetResource()->ReadFromCache(
      49           0 :     reinterpret_cast<char*>(aBuffer), aOffset, aCount);
      50           0 :   if (NS_FAILED(rv)) {
      51           0 :     *aBytesRead = 0;
      52           0 :     return false;
      53             :   }
      54           0 :   *aBytesRead = aCount;
      55           0 :   return true;
      56             : }
      57             : 
      58             : bool
      59           0 : ResourceStream::Length(int64_t* aSize)
      60             : {
      61           0 :   if (mResource.GetLength() < 0)
      62           0 :     return false;
      63           0 :   *aSize = mResource.GetLength();
      64           0 :   return true;
      65             : }
      66             : 
      67             : } // namespace mp4_demuxer