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fixed buffer size format negotiation

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@6810 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
beveloper 2004-02-29 18:46:09 +00:00
parent f19cd99782
commit fd8c0a5cca
1 changed files with 10 additions and 10 deletions
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20
src/add-ons/media/plugins/mp3_decoder/mp3DecoderPlugin.cpp
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@ -15,9 +15,10 @@
#define DECODE_BUFFER_SIZE (32 * 1024)
inline size_t
AudioBufferSize(int32 channel_count, uint32 sample_format, float frame_rate, bigtime_t buffer_duration = 50000 /* 50 ms */)
AudioBufferSize(const media_raw_audio_format &raf, bigtime_t buffer_duration = 50000 /* 50 ms */)
{
return (sample_format & 0xf) * channel_count * (size_t)((frame_rate * buffer_duration) / 1000000.0);
return (raf.format & 0xf) * (raf.channel_count)
* (size_t)((raf.frame_rate * buffer_duration) / 1000000.0);
}
// bit_rate_table[mpeg_version_index][layer_index][bitrate_index]
@ -129,18 +130,17 @@ mp3Decoder::NegotiateOutputFormat(media_format *ioDecodedFormat)
ioDecodedFormat->type = B_MEDIA_RAW_AUDIO;
ioDecodedFormat->u.raw_audio.frame_rate = fFrameRate;
ioDecodedFormat->u.raw_audio.channel_count = fChannelCount;
ioDecodedFormat->u.raw_audio.format = media_raw_audio_format::B_AUDIO_SHORT; // XXX should support other formats, too
ioDecodedFormat->u.raw_audio.byte_order = B_MEDIA_HOST_ENDIAN; // XXX should support other endain, too
if (ioDecodedFormat->u.raw_audio.buffer_size < 512 || ioDecodedFormat->u.raw_audio.buffer_size > 65536)
ioDecodedFormat->u.raw_audio.buffer_size = AudioBufferSize(
fChannelCount,
ioDecodedFormat->u.raw_audio.format,
fFrameRate);
ioDecodedFormat->u.raw_audio.format = media_raw_audio_format::B_AUDIO_SHORT;
ioDecodedFormat->u.raw_audio.byte_order = B_MEDIA_HOST_ENDIAN;
int frame_size = (ioDecodedFormat->u.raw_audio.format & 0xf) * ioDecodedFormat->u.raw_audio.channel_count;
if (ioDecodedFormat->u.raw_audio.buffer_size == 0 || (ioDecodedFormat->u.raw_audio.buffer_size % frame_size) != 0)
ioDecodedFormat->u.raw_audio.buffer_size = AudioBufferSize(ioDecodedFormat->u.raw_audio);
if (ioDecodedFormat->u.raw_audio.channel_mask == 0)
ioDecodedFormat->u.raw_audio.channel_mask = (fChannelCount == 1) ? B_CHANNEL_LEFT : B_CHANNEL_LEFT | B_CHANNEL_RIGHT;
// setup rest of the needed variables
fFrameSize = (ioDecodedFormat->u.raw_audio.format & 0xf) * fChannelCount;
fFrameSize = frame_size;
fOutputBufferSize = ioDecodedFormat->u.raw_audio.buffer_size;
return B_OK;