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Sat, 12 Feb 2022 03:46:24 -0800 (PST) Message-ID: Date: Sat, 12 Feb 2022 08:46:22 -0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.6.0 Content-Language: en-US To: ffmpeg-devel@ffmpeg.org References: <20220212001301.4090-1-jamrial@gmail.com> From: James Almer In-Reply-To: Subject: Re: [FFmpeg-devel] [RFC][PATCH 1/4] avutil/frame: add an internal field to store the size of AVFrame X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: On 2/12/2022 2:29 AM, Andreas Rheinhardt wrote: > James Almer: >> This is unfortunately needed to remove (or reduce the awfulness) of certain >> modules violating the AVFrame API and using sizeof(AVFrame). >> With this, the sizeof(AVFrame) value of the libavutil loaded at runtime can be >> used instead of the compile time value of whatever library included frame.h >> >> Signed-off-by: James Almer >> --- >> This is sucks, but at least less so than the current situation. >> >> I don't see wrapped_avframe going away anytime soon, so something must be done, >> and last time i tried to change how the packets are generated my approach was >> shut down, so here's another attempt. >> >> libavutil/frame.c | 3 +++ >> libavutil/frame_internal.h | 33 +++++++++++++++++++++++++++++++++ >> 2 files changed, 36 insertions(+) >> create mode 100644 libavutil/frame_internal.h >> >> diff --git a/libavutil/frame.c b/libavutil/frame.c >> index 8997c85e35..a63d2979db 100644 >> --- a/libavutil/frame.c >> +++ b/libavutil/frame.c >> @@ -23,6 +23,7 @@ >> #include "cpu.h" >> #include "dict.h" >> #include "frame.h" >> +#include "frame_internal.h" >> #include "imgutils.h" >> #include "mem.h" >> #include "samplefmt.h" >> @@ -33,6 +34,8 @@ >> (frame)->channels == \ >> av_get_channel_layout_nb_channels((frame)->channel_layout)) >> >> +const size_t avpriv_avframe_size = sizeof(AVFrame); >> + >> #if FF_API_COLORSPACE_NAME >> const char *av_get_colorspace_name(enum AVColorSpace val) >> { >> diff --git a/libavutil/frame_internal.h b/libavutil/frame_internal.h >> new file mode 100644 >> index 0000000000..07c246f86a >> --- /dev/null >> +++ b/libavutil/frame_internal.h >> @@ -0,0 +1,33 @@ >> +/* >> + * This file is part of FFmpeg. >> + * >> + * FFmpeg is free software; you can redistribute it and/or >> + * modify it under the terms of the GNU Lesser General Public >> + * License as published by the Free Software Foundation; either >> + * version 2.1 of the License, or (at your option) any later version. >> + * >> + * FFmpeg is distributed in the hope that it will be useful, >> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >> + * Lesser General Public License for more details. >> + * >> + * You should have received a copy of the GNU Lesser General Public >> + * License along with FFmpeg; if not, write to the Free Software >> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA >> + */ >> + >> +#ifndef AVUTIL_FRAME_INTERNAL_H >> +#define AVUTIL_FRAME_INTERNAL_H >> + >> +#include > > size_t is in stddef.h and some other headers, but not in stdint.h. > >> + >> +#include "frame.h" >> + >> +/** >> + * sizeof(AVFrame). If you think you need to use it, then you need to change >> + * your code so you don't instead. >> + * Meant for exceptions like wrapped_avframe. >> + */ >> +extern const size_t avpriv_avframe_size; >> + >> +#endif /* AVUTIL_FRAME_INTERNAL_H */ > > Missing av_export_avutil. (And aren't there systems where exporting data > is always problematic?) Wouldn't that mean that existing constants like av_md5_size and av_sha_size are not working? > > - Andreas > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".