> 在 2019年8月12日，20:29，myp...@gmail.com 写道：
>
> On Sun, Aug 11, 2019 at 4:43 PM Steven Liu <l...@chinaffmpeg.org> wrote:
>>
>>
>>
>>> 在 2019年8月8日，19:32，Jun Zhao <mypopy...@gmail.com> 写道：
>>>
>>> From: tomajsjiang <tomajsji...@tencent.com>
>>>
>>> Add new API ffio_realloc_buf for AVIO buffer realloc.
>>>
>>> Signed-off-by: Zhongxing Jiang <tomajsji...@tencent.com>
>>> ---
>>> libavformat/avio_internal.h | 9 +++++++++
>>> libavformat/aviobuf.c | 31 +++++++++++++++++++++++++++++++
>>> 2 files changed, 40 insertions(+), 0 deletions(-)
>>>
>>> diff --git a/libavformat/avio_internal.h b/libavformat/avio_internal.h
>>> index 04c1ad5..eb628ac 100644
>>> --- a/libavformat/avio_internal.h
>>> +++ b/libavformat/avio_internal.h
>>> @@ -87,6 +87,15 @@ int ffio_read_size(AVIOContext *s, unsigned char *buf,
>>> int size);
>>> int ffio_set_buf_size(AVIOContext *s, int buf_size);
>>>
>>> /**
>>> + * Reallocate a given buffer for AVIOContext.
>>> + *
>>> + * @param s the AVIOContext to realloc.
>>> + * @param buf_size required new buffer size.
>>> + * @return 0 on success, a negative AVERROR on failure.
>>> + */
>>> +int ffio_realloc_buf(AVIOContext *s, int buf_size);
>>> +
>>> +/**
>>> * Ensures that the requested seekback buffer size will be available
>>> *
>>> * Will ensure that when reading sequentially up to buf_size, seeking
>>> diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
>>> index 2d01102..3b59180 100644
>>> --- a/libavformat/aviobuf.c
>>> +++ b/libavformat/aviobuf.c
>>> @@ -1093,6 +1093,37 @@ int ffio_set_buf_size(AVIOContext *s, int buf_size)
>>> return 0;
>>> }
>>>
>>> +int ffio_realloc_buf(AVIOContext *s, int buf_size)
>>> +{
>>> + uint8_t *buffer;
>>> + int data_size;
>>> +
>>> + if (!s->buffer_size)
>>> + return ffio_set_buf_size(s, buf_size);
>>> +
>>> + if (buf_size <= s->buffer_size)
>>> + return 0;
>>> +
>>> + buffer = av_malloc(buf_size);
>>> + if (!buffer)
>>> + return AVERROR(ENOMEM);
>>> +
>>> + data_size = s->write_flag ? (s->buf_ptr - s->buffer) : (s->buf_end -
>>> s->buf_ptr);
>>> + if (data_size > 0)
>>> + memcpy(buffer, s->write_flag ? s->buffer : s->buf_ptr, data_size);
>>> + av_free(s->buffer);
>>> + s->buffer = buffer;
>>> + s->orig_buffer_size = buf_size;
>>> + s->buffer_size = buf_size;
>>> + s->buf_ptr = s->write_flag ? (s->buffer + data_size) : s->buffer;
>>> + if (s->write_flag)
>>> + s->buf_ptr_max = s->buffer + data_size;
>>> +
>>> + s->buf_end = s->write_flag ? (s->buffer + s->buffer_size) :
>>> (s->buf_ptr + data_size);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> static int url_resetbuf(AVIOContext *s, int flags)
>>> {
>>> av_assert1(flags == AVIO_FLAG_WRITE || flags == AVIO_FLAG_READ);
>>> --
>>> 1.7.1
>>>
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>>
>> patchset LGTM
>>
>> btw, maybe this should bump version.h ?
>>
> ffio_realloc_buf is an internal function, I don't know is it needed to
> bump the version.
yes you are right :)
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Thanks
Steven
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