15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/filters/ffmpeg_h264_to_annex_b_bitstream_converter.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/ffmpeg/ffmpeg_common.h" 9010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)#include "media/formats/mp4/box_definitions.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace media { 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FFmpegH264ToAnnexBBitstreamConverter::FFmpegH264ToAnnexBBitstreamConverter( 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AVCodecContext* stream_context) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : configuration_processed_(false), 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) stream_context_(stream_context) { 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) CHECK(stream_context_); 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)FFmpegH264ToAnnexBBitstreamConverter::~FFmpegH264ToAnnexBBitstreamConverter() {} 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool FFmpegH264ToAnnexBBitstreamConverter::ConvertPacket(AVPacket* packet) { 23010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) scoped_ptr<mp4::AVCDecoderConfigurationRecord> avc_config; 24010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 25010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (packet == NULL || !packet->data) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Calculate the needed output buffer size. 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!configuration_processed_) { 30010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (!stream_context_->extradata || stream_context_->extradata_size <= 0) 31010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) return false; 32010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 33010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) avc_config.reset(new mp4::AVCDecoderConfigurationRecord()); 34010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 35010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (!converter_.ParseConfiguration( 36010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) stream_context_->extradata, 37010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) stream_context_->extradata_size, 38010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) avc_config.get())) { 39010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) return false; 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 42010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 43010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) uint32 output_packet_size = converter_.CalculateNeededOutputBufferSize( 44010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) packet->data, packet->size, avc_config.get()); 45010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 46010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (output_packet_size == 0) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; // Invalid input packet. 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Allocate new packet for the output. 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AVPacket dest_packet; 51010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (av_new_packet(&dest_packet, output_packet_size) != 0) 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; // Memory allocation failure. 53010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is a bit tricky: since the interface does not allow us to replace 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the pointer of the old packet with a new one, we will initially copy the 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // metadata from old packet to new bigger packet. 57cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) av_packet_copy_props(&dest_packet, packet); 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Proceed with the conversion of the actual in-band NAL units, leave room 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // for configuration in the beginning. 61010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) uint32 io_size = dest_packet.size; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!converter_.ConvertNalUnitStreamToByteStream( 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) packet->data, packet->size, 64010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) avc_config.get(), 65010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) dest_packet.data, &io_size)) { 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 69010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (avc_config) 70010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) configuration_processed_ = true; 71010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // At the end we must destroy the old packet. 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) av_free_packet(packet); 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *packet = dest_packet; // Finally, replace the values in the input packet. 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace media 80