blob: 87444d92541ac27f47d995ef257ec4cf636380dd (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <string.h>
#include <unistd.h>
#include "MediaTaskQueue.h"
#include "FFmpegLog.h"
#include "FFmpegDataDecoder.h"
#include "prsystem.h"
#include "FFmpegRuntimeLinker.h"
namespace mozilla
{
bool FFmpegDataDecoder<LIBAV_VER>::sFFmpegInitDone = false;
StaticMutex FFmpegDataDecoder<LIBAV_VER>::sMonitor;
FFmpegDataDecoder<LIBAV_VER>::FFmpegDataDecoder(FlushableMediaTaskQueue* aTaskQueue,
AVCodecID aCodecID)
: mTaskQueue(aTaskQueue)
, mCodecContext(nullptr)
, mFrame(NULL)
, mExtraData(nullptr)
, mCodecID(aCodecID)
{
MOZ_COUNT_CTOR(FFmpegDataDecoder);
}
FFmpegDataDecoder<LIBAV_VER>::~FFmpegDataDecoder()
{
MOZ_COUNT_DTOR(FFmpegDataDecoder);
}
nsresult
FFmpegDataDecoder<LIBAV_VER>::Init()
{
FFMPEG_LOG("Initialising FFmpeg decoder.");
AVCodec* codec = FindAVCodec(mCodecID);
if (!codec) {
NS_WARNING("Couldn't find ffmpeg decoder");
return NS_ERROR_FAILURE;
}
StaticMutexAutoLock mon(sMonitor);
if (!(mCodecContext = avcodec_alloc_context3(codec))) {
NS_WARNING("Couldn't init ffmpeg context");
return NS_ERROR_FAILURE;
}
mCodecContext->opaque = this;
InitCodecContext();
if (mExtraData) {
mCodecContext->extradata_size = mExtraData->Length();
// FFmpeg may use SIMD instructions to access the data which reads the
// data in 32 bytes block. Must ensure we have enough data to read.
#if LIBAVCODEC_VERSION_MAJOR >= 58
mExtraData->AppendElements(AV_INPUT_BUFFER_PADDING_SIZE);
#else
mExtraData->AppendElements(FF_INPUT_BUFFER_PADDING_SIZE);
#endif
mCodecContext->extradata = mExtraData->Elements();
} else {
mCodecContext->extradata_size = 0;
}
#if LIBAVCODEC_VERSION_MAJOR < 57
if (codec->capabilities & CODEC_CAP_DR1) {
mCodecContext->flags |= CODEC_FLAG_EMU_EDGE;
}
#endif
if (avcodec_open2(mCodecContext, codec, nullptr) < 0) {
NS_WARNING("Couldn't initialise ffmpeg decoder");
avcodec_close(mCodecContext);
av_freep(&mCodecContext);
return NS_ERROR_FAILURE;
}
if (mCodecContext->codec_type == AVMEDIA_TYPE_AUDIO &&
mCodecContext->sample_fmt != AV_SAMPLE_FMT_FLT &&
mCodecContext->sample_fmt != AV_SAMPLE_FMT_FLTP &&
mCodecContext->sample_fmt != AV_SAMPLE_FMT_S16 &&
mCodecContext->sample_fmt != AV_SAMPLE_FMT_S16P) {
NS_WARNING("FFmpeg audio decoder outputs unsupported audio format.");
return NS_ERROR_FAILURE;
}
FFMPEG_LOG("FFmpeg init successful.");
return NS_OK;
}
nsresult
FFmpegDataDecoder<LIBAV_VER>::Flush()
{
mTaskQueue->Flush();
if (mCodecContext) {
avcodec_flush_buffers(mCodecContext);
}
return NS_OK;
}
nsresult
FFmpegDataDecoder<LIBAV_VER>::Shutdown()
{
StaticMutexAutoLock mon(sMonitor);
if (sFFmpegInitDone && mCodecContext) {
avcodec_close(mCodecContext);
av_freep(&mCodecContext);
#if LIBAVCODEC_VERSION_MAJOR >= 55
av_frame_free(&mFrame);
#elif LIBAVCODEC_VERSION_MAJOR == 54
avcodec_free_frame(&mFrame);
#else
av_freep(&mFrame);
#endif
}
return NS_OK;
}
AVFrame*
FFmpegDataDecoder<LIBAV_VER>::PrepareFrame()
{
#if LIBAVCODEC_VERSION_MAJOR >= 55
if (mFrame) {
av_frame_unref(mFrame);
} else {
mFrame = av_frame_alloc();
}
#elif LIBAVCODEC_VERSION_MAJOR == 54
if (mFrame) {
avcodec_get_frame_defaults(mFrame);
} else {
mFrame = avcodec_alloc_frame();
}
#else
av_freep(&mFrame);
mFrame = avcodec_alloc_frame();
#endif
return mFrame;
}
/* static */ AVCodec*
FFmpegDataDecoder<LIBAV_VER>::FindAVCodec(AVCodecID aCodec)
{
StaticMutexAutoLock mon(sMonitor);
if (!sFFmpegInitDone) {
avcodec_register_all();
#ifdef DEBUG
av_log_set_level(AV_LOG_DEBUG);
#endif
sFFmpegInitDone = true;
}
return avcodec_find_decoder(aCodec);
}
} // namespace mozilla
|
