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* This copyright notice applies to this header file only:
*
* Copyright (c) 2010-2024 NVIDIA Corporation
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, includi ng without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the software, and to permit persons to whom the
* software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#pragma once
#include "NvCodecUtils.h"
#include "FFmpegDemuxer.h"
//---------------------------------------------------------------------------
//! \file FFmpegMuxer.h
//! \brief Provides functionality for stream demuxing
//!
//! This header file is used by Transcode apps to demux input video clips before decoding frames from it.
//---------------------------------------------------------------------------
/**
* @brief libavformat wrapper class. Puts the elementary encoded stream into container format.
*/
typedef enum {
MEDIA_FORMAT_ELEMENTARY = 0,
MEDIA_FORMAT_MOV = 1,
MEDIA_FORMAT_MP4 = 2,
} MEDIA_FORMAT;
MEDIA_FORMAT GetMediaFormat (char* szOutputFileName)
{
char* extension = strrchr(szOutputFileName, '.');
if (_stricmp(extension, ".mov") == 0)
{
return MEDIA_FORMAT_MOV;
}
else if (_stricmp(extension, ".mp4") == 0)
{
return MEDIA_FORMAT_MP4;
}
else
return MEDIA_FORMAT_ELEMENTARY;
}
class FFmpegMuxer {
private:
AVFormatContext* inFmtc = NULL;
AVFormatContext* fmtc = NULL;
AVIOContext* avioc = NULL;
AVPacket* packet = NULL;
AVStream* videoStream = NULL;
AVStream* stream = NULL;
int iVideoStream;
int nWidth, nHeight;
double timeBase = 0.0;
int64_t userTimeScale = 0;
public:
FFmpegMuxer(const char* szFilePath, MEDIA_FORMAT mediaFormat, AVFormatContext *inFmtc, AVCodecID codecID, int width, int height) {
if (mediaFormat == MEDIA_FORMAT_MOV)
{
ck(avformat_alloc_output_context2(&fmtc, NULL, "mov", szFilePath));
}
else if (mediaFormat == MEDIA_FORMAT_MP4)
{
ck(avformat_alloc_output_context2(&fmtc, NULL, "mp4", szFilePath));
}
this->inFmtc = inFmtc;
for (int i = 0; i < (int)inFmtc->nb_streams; i++)
{
if (inFmtc->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
{
stream = avformat_new_stream(fmtc, NULL);
if (!stream) {
LOG(ERROR) << "Stream creation failed";
return;
}
stream->codecpar->codec_id = codecID;
stream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
stream->codecpar->width = width;
stream->codecpar->height = height;
}
else
{
stream = avformat_new_stream(fmtc, NULL);
if (!stream) {
LOG(ERROR) << "Stream creation failed";
return;
}
if (avcodec_parameters_copy(stream->codecpar, inFmtc->streams[i]->codecpar) < 0) {
LOG(ERROR) << "Error copying codec parameters";
return;
}
}
stream->time_base = inFmtc->streams[i]->time_base;
if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
{
iVideoStream = i;
videoStream = stream;
}
}
//fix the default time resolution
if (!(fmtc->oformat->flags & AVFMT_NOFILE)) {
if (avio_open(&fmtc->pb, szFilePath, AVIO_FLAG_WRITE) < 0) {
LOG(ERROR) << "Error opening output file" << szFilePath;
return;
}
}
if (avformat_write_header(fmtc, NULL) < 0) {
LOG(ERROR) << "Error writing header";
return;
}
packet = av_packet_alloc();
if (!packet) {
LOG(ERROR) << "Error allocating packet";
return;
}
}
~FFmpegMuxer() {
if (!fmtc) {
return;
}
av_write_trailer(fmtc);
if (!(fmtc->oformat->flags & AVFMT_NOFILE)) {
avio_closep(&fmtc->pb);
}
av_packet_unref(packet);
av_packet_free(&packet);
avformat_free_context(fmtc);
if (avioc) {
av_freep(&avioc->buffer);
av_freep(&avioc);
}
}
bool Mux(uint8_t* data, unsigned int size, int64_t pts, int64_t dts, int stream_index, int is_key_frame = 0, int numb = 0) {
if (!fmtc) {
return false;
}
packet->data = data;
packet->size = size;
packet->stream_index = stream_index;
if (is_key_frame)
packet->flags |= AV_PKT_FLAG_KEY;
int offset = 0;
if (inFmtc->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
{
AVRational r = { 1, inFmtc->streams[stream_index]->avg_frame_rate.num };
if (inFmtc->streams[stream_index]->avg_frame_rate.num > 0) {
packet->duration = av_rescale_q(1, r, fmtc->streams[stream_index]->time_base);
offset = (int)(numb * inFmtc->streams[stream_index]->time_base.den * inFmtc->streams[stream_index]->avg_frame_rate.den / inFmtc->streams[stream_index]->avg_frame_rate.num);
}
else {
packet->duration = 0;
}
}
packet->pts = av_rescale_q(pts, inFmtc->streams[stream_index]->time_base, fmtc->streams[stream_index]->time_base) + offset;
packet->dts = av_rescale_q(dts, inFmtc->streams[stream_index]->time_base, fmtc->streams[stream_index]->time_base);
if (packet->pts < packet->dts) {
packet->pts = packet->dts;
}
if (av_interleaved_write_frame(fmtc, packet) < 0) {
LOG(ERROR) << "Error writing frame\n";
return false;
}
return true;
}
};
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