| // Copyright 2018 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // This file implements the FFMPEGDispatch interface for a library linked |
| // directly, or which the symbols are already available in the global namespace. |
| |
| #include "starboard/shared/ffmpeg/ffmpeg_dispatch.h" |
| |
| #include <dlfcn.h> |
| #include <map> |
| |
| #include "starboard/common/scoped_ptr.h" |
| #include "starboard/log.h" |
| #include "starboard/once.h" |
| #include "starboard/shared/ffmpeg/ffmpeg_common.h" |
| #include "starboard/shared/starboard/lazy_initialization_internal.h" |
| #include "starboard/string.h" |
| |
| namespace starboard { |
| namespace shared { |
| namespace ffmpeg { |
| namespace { |
| |
| FFMPEGDispatch* g_ffmpeg_dispatch_impl; |
| SbOnceControl g_construct_ffmpeg_dispatch_once = SB_ONCE_INITIALIZER; |
| |
| void construct_ffmpeg_dispatch() { |
| g_ffmpeg_dispatch_impl = new FFMPEGDispatch(); |
| } |
| |
| void LoadSymbols(FFMPEGDispatch* ffmpeg) { |
| SB_DCHECK(ffmpeg->is_valid()); |
| // Load the desired symbols from the shared libraries. Note: If a symbol is |
| // listed as a '.text' entry in the output of 'objdump -T' on the shared |
| // library file, then it is directly available from it. |
| |
| #define INITSYMBOL(symbol) \ |
| ffmpeg->symbol = reinterpret_cast<decltype(FFMPEGDispatch::symbol)>(symbol); |
| |
| // Load symbols from the avutil shared library. |
| INITSYMBOL(avutil_version); |
| SB_DCHECK(ffmpeg->avutil_version); |
| INITSYMBOL(av_malloc); |
| INITSYMBOL(av_freep); |
| #if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(52, 8, 0) |
| INITSYMBOL(av_frame_alloc); |
| INITSYMBOL(av_frame_unref); |
| #endif |
| INITSYMBOL(av_samples_get_buffer_size); |
| INITSYMBOL(av_opt_set_int); |
| INITSYMBOL(av_image_check_size); |
| INITSYMBOL(av_buffer_create); |
| |
| // Load symbols from the avcodec shared library. |
| INITSYMBOL(avcodec_version); |
| SB_DCHECK(ffmpeg->avcodec_version); |
| INITSYMBOL(avcodec_alloc_context3); |
| INITSYMBOL(avcodec_find_decoder); |
| INITSYMBOL(avcodec_close); |
| INITSYMBOL(avcodec_open2); |
| INITSYMBOL(av_init_packet); |
| INITSYMBOL(avcodec_decode_audio4); |
| INITSYMBOL(avcodec_decode_video2); |
| INITSYMBOL(avcodec_flush_buffers); |
| #if LIBAVUTIL_VERSION_INT < AV_VERSION_INT(52, 8, 0) |
| INITSYMBOL(avcodec_alloc_frame); |
| INITSYMBOL(avcodec_get_frame_defaults); |
| #endif |
| |
| // Load symbols from the avformat shared library. |
| INITSYMBOL(avformat_version); |
| SB_DCHECK(ffmpeg->avformat_version); |
| INITSYMBOL(av_register_all); |
| SB_DCHECK(ffmpeg->av_register_all); |
| |
| #undef INITSYMBOL |
| } |
| } // namespace |
| |
| FFMPEGDispatch::FFMPEGDispatch() { |
| LoadSymbols(this); |
| av_register_all(); |
| } |
| |
| FFMPEGDispatch::~FFMPEGDispatch() {} |
| |
| // static |
| FFMPEGDispatch* FFMPEGDispatch::GetInstance() { |
| bool initialized = |
| SbOnce(&g_construct_ffmpeg_dispatch_once, construct_ffmpeg_dispatch); |
| SB_DCHECK(initialized); |
| return g_ffmpeg_dispatch_impl; |
| } |
| |
| // static |
| bool FFMPEGDispatch::RegisterSpecialization(int specialization, |
| int avcodec, |
| int avformat, |
| int avutil) { |
| // There is always only a single version of the library linked to the |
| // application, so there is no need to explicitly track multiple versions. |
| return true; |
| } |
| |
| bool FFMPEGDispatch::is_valid() const { |
| // Loading of a linked library is always successful. |
| return true; |
| } |
| |
| int FFMPEGDispatch::specialization_version() const { |
| // There is only one version of ffmpeg linked to the binary. |
| return FFMPEG; |
| } |
| |
| } // namespace ffmpeg |
| } // namespace shared |
| } // namespace starboard |