Hello all,
Trying to compile the Chromium browser by myself, I encountered that compile
fails due to variable
declarations in ffmpeg_demuxer.cc in Chromium's source code.
In the file, the following call to av_packet_get_side_data() is made:
size_t id_size = 0;
uint8_t* id_data = av_packet_get_side_data(
packet.get(), AV_PKT_DATA_WEBVTT_IDENTIFIER, &id_size);
size_t settings_size = 0;
uint8_t* settings_data = av_packet_get_side_data(
packet.get(), AV_PKT_DATA_WEBVTT_SETTINGS, &settings_size);
Compilation fails, however, with the error "no matching function found for
av_packet_get_side_data",
and the reason appears to be the following code in libavcodec/packet.h, line
626:
uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType
type,
#if FF_API_BUFFER_SIZE_T
int *size);
#else
size_t *size);
#endif
If FF_API_BUFFER_SIZE_T is defined, this declaration expects *size to be of
type int instead of
size_t - because the size_t declaration sits in the #else branch of that
declaration (instead of the
#if branch as I (and apparently the Chromium developers) would have expected).
But FF_API_BUFFER_SIZE_T, in my understanding, by its name should mean that
size_t is used, however,
the code in libavcodec/packet.h just handles it the other way round (ffmpeg
version n4.4).
This means you can only have *size of type size_t when FF_API_BUFFER_SIZE_T is
NOT defined.
Is this behavior intended? Or am I simply understanding something wrong here?
Thank you very much for your help in advance and kind regards,
Gerd
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