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libavdevice/avfoundation.m: fix protential unreleased lock issue 

The problem here is that the lock ctx->frame_lock will
become an unreleased lock if the program returns at
line 697, line 735 and line744.

Bug tracker link: https://trac.ffmpeg.org/ticket/9385\#ticket

Signed-off-by: Chengfeng Ye <cyeaa@connect.ust.hk>
This commit is contained in:
Chengfeng Ye 2021-08-26 07:40:24 -07:00 committed by Thilo Borgmann
parent a6760bb92b
commit 9bbdfbfb32
1 changed files with 3 additions and 0 deletions
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3
libavdevice/avfoundation.m
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@ -693,6 +693,7 @@ static int get_audio_config(AVFormatContext *s)
const AudioStreamBasicDescription *basic_desc = CMAudioFormatDescriptionGetStreamBasicDescription(format_desc);
if (!basic_desc) {
unlock_frames(ctx);
av_log(s, AV_LOG_ERROR, "audio format not available\n");
return 1;
}
@ -731,6 +732,7 @@ static int get_audio_config(AVFormatContext *s)
ctx->audio_packed) {
stream->codecpar->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
} else {
unlock_frames(ctx);
av_log(s, AV_LOG_ERROR, "audio format is not supported\n");
return 1;
}
@ -740,6 +742,7 @@ static int get_audio_config(AVFormatContext *s)
ctx->audio_buffer_size = CMBlockBufferGetDataLength(block_buffer);
ctx->audio_buffer = av_malloc(ctx->audio_buffer_size);
if (!ctx->audio_buffer) {
unlock_frames(ctx);
av_log(s, AV_LOG_ERROR, "error allocating audio buffer\n");
return 1;
}