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ffmpeghelpers.h
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ffmpeghelpers.h
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#pragma once
#include <assert.h>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
}
#include "logger.h"
class ffmpeg
{
public:
static void dump (AVFormatContext * fc, const QString & tabs = "")
{
if (fc)
{
LOGFN_INFO(QString("%1url: 0x%2").arg(tabs).arg(fc->url));
LOGFN_INFO(QString("%1open demuxer flags: 0x%2").arg(tabs).arg(QString::number(fc->flags, 16)));
LOGFN_INFO(QString("%1forced video codec id: %2").arg(tabs).arg(QString::number(fc->video_codec_id, 10)));
LOGFN_INFO(QString("%1flags signalling stream properties: 0x%2").arg(tabs).arg(QString::number(fc->ctx_flags, 16)));
if (fc->ctx_flags & AVFMTCTX_NOHEADER)
{
LOGFN_INFO(QString("%1ctx_flags: AVFMTCTX_NOHEADER").arg(tabs));
}
if (fc->ctx_flags & AVFMTCTX_UNSEEKABLE)
{
LOGFN_INFO(QString("%1ctx_flags: AVFMTCTX_UNSEEKABLE").arg(tabs));
}
AVInputFormat * iformat = fc->iformat;
if (iformat)
{
LOGFN_INFO(QString("%1input format:").arg(tabs));
ffmpeg::dump(iformat, tabs + " ");
}
LOGFN_INFO(QString("%1number of streams: %2").arg(tabs).arg(fc->nb_streams));
for (size_t i=0; i<fc->nb_streams; ++i)
{
LOGFN_INFO(QString("%1stream %2:").arg(tabs).arg(i));
dump(fc->streams[i], tabs + " ");
}
}
}
static void dump (AVCodecParameters * codecpar, const QString & tabs = "")
{
if (codecpar)
{
LOGFN_INFO(QString("%1stream codec type: %2").arg(tabs).arg(av_get_media_type_string(codecpar->codec_type)));
LOGFN_INFO(QString("%1codec name: %2").arg(tabs).arg(avcodec_get_name(codecpar->codec_id)));
}
}
static void dump (AVInputFormat * iformat, const QString & tabs = "")
{
if (iformat)
{
LOGFN_INFO(QString("%1input format name: %2").arg(tabs).arg(iformat->name));
LOGFN_INFO(QString("%1input format flags: %2").arg(tabs).arg(iformat->flags));
if (iformat->flags & AVFMT_NOFILE)
{
LOGFN_INFO(QString("%1flags: AVFMT_NOFILE").arg(tabs));
}
if (iformat->flags & AVFMT_NEEDNUMBER)
{
LOGFN_INFO(QString("%1flags: AVFMT_NEEDNUMBER").arg(tabs));
}
if (iformat->flags & AVFMT_SHOW_IDS)
{
LOGFN_INFO(QString("%1flags: AVFMT_SHOW_IDS").arg(tabs));
}
if (iformat->flags & AVFMT_NOTIMESTAMPS)
{
LOGFN_INFO(QString("%1flags: AVFMT_NOTIMESTAMPS").arg(tabs));
}
if (iformat->flags & AVFMT_GENERIC_INDEX)
{
LOGFN_INFO(QString("%1flags: AVFMT_GENERIC_INDEX").arg(tabs));
}
if (iformat->flags & AVFMT_TS_DISCONT)
{
LOGFN_INFO(QString("%1flags: AVFMT_TS_DISCONT").arg(tabs));
}
if (iformat->flags & AVFMT_NOBINSEARCH)
{
LOGFN_INFO(QString("%1flags: AVFMT_NOBINSEARCH").arg(tabs));
}
if (iformat->flags & AVFMT_NOGENSEARCH)
{
LOGFN_INFO(QString("%1flags: AVFMT_NOGENSEARCH").arg(tabs));
}
if (iformat->flags & AVFMT_NO_BYTE_SEEK)
{
LOGFN_INFO(QString("%1flags: AVFMT_NO_BYTE_SEEK").arg(tabs));
}
if (iformat->flags & AVFMT_SEEK_TO_PTS)
{
LOGFN_INFO(QString("%1flags: AVFMT_SEEK_TO_PTS").arg(tabs));
}
}
}
static void dump (AVStream * stream, const QString & tabs = "")
{
if (stream)
{
AVCodecParameters *codecpar = stream->codecpar;
assert(codecpar);
ffmpeg::dump(codecpar, tabs + " ");
}
}
static QString avcodec_get_name (enum AVCodecID id)
{
const char * name = ::avcodec_get_name(id);
assert(name);
return QString(name);
}
static QString av_strerror (int errNum)
{
char errBuf[AV_ERROR_MAX_STRING_SIZE] = {0};
int ret = ::av_strerror (errNum, errBuf, AV_ERROR_MAX_STRING_SIZE);
if( 0 != ret)
{
return QString("av_strerror failed for %1").arg(errNum);
}
return QString(errBuf);
}
static void av_init_packet(AVPacket * pkt)
{
assert(pkt);
::av_init_packet (pkt);
assert (pkt->data == nullptr);
assert (pkt->size == 0);
pkt->data = nullptr;
pkt->size = 0;
}
static int av_read_frame(AVFormatContext *ctx, AVPacket * pkt)
{
assert(ctx);
assert(pkt != nullptr);
assert(pkt->buf == nullptr);
int ret = ::av_read_frame(ctx, pkt);
return ret;
}
static AVFormatContext * avformat_alloc_context(void)
{
AVFormatContext * ret = ::avformat_alloc_context ();
assert (ret);
return ret;
}
};