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avcodec: fix avcodec_encode_audio() documentation.

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the previous documentation indicated how many bytes are read from the input,
not how many samples are read.
This commit is contained in:
Justin Ruggles 2011-12-30 19:35:45 -05:00
parent 15f073ee6d
commit 07837e4158
1 changed files with 8 additions and 5 deletions
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13
libavcodec/avcodec.h
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@ -4200,9 +4200,9 @@ void avsubtitle_free(AVSubtitle *sub);
* Encode an audio frame from samples into buf.
*
* @note The output buffer should be at least FF_MIN_BUFFER_SIZE bytes large.
* However, for PCM audio the user will know how much space is needed
* because it depends on the value passed in buf_size as described
* below. In that case a lower value can be used.
* However, for codecs with avctx->frame_size equal to 0 (e.g. PCM) the user
* will know how much space is needed because it depends on the value passed
* in buf_size as described below. In that case a lower value can be used.
*
* @param avctx the codec context
* @param[out] buf the output buffer
@ -4210,8 +4210,11 @@ void avsubtitle_free(AVSubtitle *sub);
* @param[in] samples the input buffer containing the samples
* The number of samples read from this buffer is frame_size*channels,
* both of which are defined in avctx.
* For PCM audio the number of samples read from samples is equal to
* buf_size * input_sample_size / output_sample_size.
* For codecs which have avctx->frame_size equal to 0 (e.g. PCM) the number of
* samples read from samples is equal to:
* buf_size * 8 / (avctx->channels * av_get_bits_per_sample(avctx->codec_id))
* This also implies that av_get_bits_per_sample() must not return 0 for these
* codecs.
* @return On error a negative value is returned, on success zero or the number
* of bytes used to encode the data read from the input buffer.
*/