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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "media/base/buffers.h"
      6 #include "media/base/decoder_buffer.h"
      7 #include "media/base/decoder_buffer_queue.h"
      8 #include "testing/gtest/include/gtest/gtest.h"
      9 
     10 namespace media {
     11 
     12 static base::TimeDelta ToTimeDelta(int seconds) {
     13   if (seconds < 0)
     14     return kNoTimestamp();
     15   return base::TimeDelta::FromSeconds(seconds);
     16 }
     17 
     18 // Helper to create buffers with specified timestamp in seconds.
     19 //
     20 // Negative numbers will be converted to kNoTimestamp();
     21 static scoped_refptr<DecoderBuffer> CreateBuffer(int timestamp) {
     22   scoped_refptr<DecoderBuffer> buffer = new DecoderBuffer(0);
     23   buffer->set_timestamp(ToTimeDelta(timestamp));
     24   buffer->set_duration(ToTimeDelta(0));
     25   return buffer;
     26 }
     27 
     28 static scoped_refptr<DecoderBuffer> CreateBuffer(int timestamp, int size) {
     29   scoped_refptr<DecoderBuffer> buffer = new DecoderBuffer(size);
     30   buffer->set_timestamp(ToTimeDelta(timestamp));
     31   buffer->set_duration(ToTimeDelta(0));
     32   return buffer;
     33 }
     34 
     35 TEST(DecoderBufferQueueTest, IsEmpty) {
     36   DecoderBufferQueue queue;
     37   EXPECT_TRUE(queue.IsEmpty());
     38 
     39   queue.Push(CreateBuffer(0));
     40   EXPECT_FALSE(queue.IsEmpty());
     41 }
     42 
     43 TEST(DecoderBufferQueueTest, Clear) {
     44   DecoderBufferQueue queue;
     45   queue.Push(CreateBuffer(0));
     46   queue.Push(CreateBuffer(1));
     47   EXPECT_FALSE(queue.IsEmpty());
     48   EXPECT_EQ(1, queue.Duration().InSeconds());
     49 
     50   queue.Clear();
     51   EXPECT_TRUE(queue.IsEmpty());
     52   EXPECT_EQ(0, queue.Duration().InSeconds());
     53 }
     54 
     55 TEST(DecoderBufferQueueTest, Duration) {
     56   DecoderBufferQueue queue;
     57   EXPECT_EQ(0, queue.Duration().InSeconds());
     58 
     59   queue.Push(CreateBuffer(0));
     60   EXPECT_EQ(0, queue.Duration().InSeconds());
     61 
     62   queue.Push(CreateBuffer(1));
     63   EXPECT_EQ(1, queue.Duration().InSeconds());
     64 
     65   queue.Push(CreateBuffer(2));
     66   EXPECT_EQ(2, queue.Duration().InSeconds());
     67 
     68   queue.Push(CreateBuffer(4));
     69   EXPECT_EQ(4, queue.Duration().InSeconds());
     70 
     71   queue.Pop();
     72   EXPECT_EQ(3, queue.Duration().InSeconds());
     73 
     74   queue.Pop();
     75   EXPECT_EQ(2, queue.Duration().InSeconds());
     76 
     77   queue.Pop();
     78   EXPECT_EQ(0, queue.Duration().InSeconds());
     79 
     80   queue.Pop();
     81   EXPECT_EQ(0, queue.Duration().InSeconds());
     82 }
     83 
     84 TEST(DecoderBufferQueueTest, Duration_OutOfOrder) {
     85   DecoderBufferQueue queue;
     86   queue.Push(CreateBuffer(10));
     87   queue.Push(CreateBuffer(12));
     88   EXPECT_EQ(2, queue.Duration().InSeconds());
     89 
     90   // Out of order: duration shouldn't change.
     91   queue.Push(CreateBuffer(8));
     92   EXPECT_EQ(2, queue.Duration().InSeconds());
     93 
     94   // Removing first buffer should leave the second buffer as the only buffer
     95   // included in the duration calculation.
     96   queue.Pop();
     97   EXPECT_EQ(0, queue.Duration().InSeconds());
     98 
     99   // Removing second buffer leaves the out-of-order buffer. It shouldn't be
    100   // included in duration calculations.
    101   queue.Pop();
    102   EXPECT_EQ(0, queue.Duration().InSeconds());
    103 
    104   // Push a still-too-early buffer. It shouldn't be included in duration
    105   // calculations.
    106   queue.Push(CreateBuffer(11));
    107   EXPECT_EQ(0, queue.Duration().InSeconds());
    108 
    109   // Push a buffer that's after the earliest valid time. It's a singular valid
    110   // buffer so duration is still zero.
    111   queue.Push(CreateBuffer(14));
    112   EXPECT_EQ(0, queue.Duration().InSeconds());
    113 
    114   // Push a second valid buffer. We should now have a duration.
    115   queue.Push(CreateBuffer(17));
    116   EXPECT_EQ(3, queue.Duration().InSeconds());
    117 }
    118 
    119 TEST(DecoderBufferQueueTest, Duration_NoTimestamp) {
    120   // Buffers with no timestamp don't affect duration.
    121   DecoderBufferQueue queue;
    122   queue.Push(CreateBuffer(0));
    123   queue.Push(CreateBuffer(4));
    124   EXPECT_EQ(4, queue.Duration().InSeconds());
    125 
    126   queue.Push(CreateBuffer(-1));
    127   EXPECT_EQ(4, queue.Duration().InSeconds());
    128 
    129   queue.Push(CreateBuffer(6));
    130   EXPECT_EQ(6, queue.Duration().InSeconds());
    131 
    132   queue.Pop();
    133   EXPECT_EQ(2, queue.Duration().InSeconds());
    134 
    135   queue.Pop();
    136   EXPECT_EQ(0, queue.Duration().InSeconds());
    137 
    138   queue.Pop();
    139   EXPECT_EQ(0, queue.Duration().InSeconds());
    140 
    141   queue.Pop();
    142   EXPECT_EQ(0, queue.Duration().InSeconds());
    143 }
    144 
    145 TEST(DecoderBufferQueueTest, DataSize) {
    146   DecoderBufferQueue queue;
    147   EXPECT_EQ(queue.data_size(), 0u);
    148 
    149   queue.Push(CreateBuffer(0, 1200u));
    150   EXPECT_EQ(queue.data_size(), 1200u);
    151 
    152   queue.Push(CreateBuffer(1, 1000u));
    153   EXPECT_EQ(queue.data_size(), 2200u);
    154 
    155   queue.Pop();
    156   EXPECT_EQ(queue.data_size(), 1000u);
    157 
    158   queue.Push(CreateBuffer(2, 999u));
    159   queue.Push(CreateBuffer(3, 999u));
    160   EXPECT_EQ(queue.data_size(), 2998u);
    161 
    162   queue.Clear();
    163   EXPECT_EQ(queue.data_size(), 0u);
    164 
    165   queue.Push(CreateBuffer(4, 1400u));
    166   EXPECT_EQ(queue.data_size(), 1400u);
    167 }
    168 
    169 }  // namespace media
    170