[vlc-commits] LPCM: decode to S16N or S32N
Rémi Denis-Courmont
git at videolan.org
Wed Dec 19 19:34:25 CET 2012
vlc | branch: master | Rémi Denis-Courmont <remi at remlab.net> | Wed Dec 19 20:33:47 2012 +0200| [0a45c7b7c87648e0441fd5848c023a5f832d08da] | committer: Rémi Denis-Courmont
LPCM: decode to S16N or S32N
> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=0a45c7b7c87648e0441fd5848c023a5f832d08da
---
modules/codec/lpcm.c | 74 ++++++++++++++++++++++++++------------------------
1 file changed, 39 insertions(+), 35 deletions(-)
diff --git a/modules/codec/lpcm.c b/modules/codec/lpcm.c
index 566f05d..18c1f5b 100644
--- a/modules/codec/lpcm.c
+++ b/modules/codec/lpcm.c
@@ -256,11 +256,11 @@ static int OpenCommon( vlc_object_t *p_this, bool b_packetizer )
{
case 24:
case 20:
- p_dec->fmt_out.i_codec = VLC_CODEC_S24B;
- p_dec->fmt_out.audio.i_bitspersample = 24;
+ p_dec->fmt_out.i_codec = VLC_CODEC_S32N;
+ p_dec->fmt_out.audio.i_bitspersample = 32;
break;
default:
- p_dec->fmt_out.i_codec = VLC_CODEC_S16B;
+ p_dec->fmt_out.i_codec = VLC_CODEC_S16N;
p_dec->fmt_out.audio.i_bitspersample = 16;
break;
}
@@ -378,13 +378,13 @@ static block_t *DecodeFrame( decoder_t *p_dec, block_t **pp_block )
/* */
if( i_bits == 16 )
{
- p_dec->fmt_out.i_codec = VLC_CODEC_S16B;
+ p_dec->fmt_out.i_codec = VLC_CODEC_S16N;
p_dec->fmt_out.audio.i_bitspersample = 16;
}
else
{
- p_dec->fmt_out.i_codec = VLC_CODEC_S24B;
- p_dec->fmt_out.audio.i_bitspersample = 24;
+ p_dec->fmt_out.i_codec = VLC_CODEC_S32N;
+ p_dec->fmt_out.audio.i_bitspersample = 32;
}
/* */
@@ -920,65 +920,69 @@ static int BdHeader( unsigned *pi_rate,
static void VobExtract( block_t *p_aout_buffer, block_t *p_block,
unsigned i_bits )
{
- uint8_t *p_out = p_aout_buffer->p_buffer;
-
/* 20/24 bits LPCM use special packing */
if( i_bits == 24 )
{
+ uint32_t *p_out = (uint32_t *)p_aout_buffer->p_buffer;
+
while( p_block->i_buffer / 12 )
{
/* Sample 1 */
- p_out[0] = p_block->p_buffer[0];
- p_out[1] = p_block->p_buffer[1];
- p_out[2] = p_block->p_buffer[8];
+ *(p_out++) = (p_block->p_buffer[ 0] << 24)
+ | (p_block->p_buffer[ 1] << 16)
+ | (p_block->p_buffer[ 8] << 8);
/* Sample 2 */
- p_out[3] = p_block->p_buffer[2];
- p_out[4] = p_block->p_buffer[3];
- p_out[5] = p_block->p_buffer[9];
+ *(p_out++) = (p_block->p_buffer[ 2] << 24)
+ | (p_block->p_buffer[ 3] << 16)
+ | (p_block->p_buffer[ 9] << 8);
/* Sample 3 */
- p_out[6] = p_block->p_buffer[4];
- p_out[7] = p_block->p_buffer[5];
- p_out[8] = p_block->p_buffer[10];
+ *(p_out++) = (p_block->p_buffer[ 4] << 24)
+ | (p_block->p_buffer[ 5] << 16)
+ | (p_block->p_buffer[10] << 8);
/* Sample 4 */
- p_out[9] = p_block->p_buffer[6];
- p_out[10] = p_block->p_buffer[7];
- p_out[11] = p_block->p_buffer[11];
+ *(p_out++) = (p_block->p_buffer[ 6] << 24)
+ | (p_block->p_buffer[ 7] << 16)
+ | (p_block->p_buffer[11] << 8);
p_block->i_buffer -= 12;
p_block->p_buffer += 12;
- p_out += 12;
}
}
else if( i_bits == 20 )
{
+ uint32_t *p_out = (uint32_t *)p_aout_buffer->p_buffer;
+
while( p_block->i_buffer / 10 )
{
/* Sample 1 */
- p_out[0] = p_block->p_buffer[0];
- p_out[1] = p_block->p_buffer[1];
- p_out[2] = p_block->p_buffer[8] & 0xF0;
+ *(p_out++) = ( p_block->p_buffer[0] << 24)
+ | ( p_block->p_buffer[1] << 16)
+ | ((p_block->p_buffer[8] & 0xF0) << 8);
/* Sample 2 */
- p_out[3] = p_block->p_buffer[2];
- p_out[4] = p_block->p_buffer[3];
- p_out[5] = p_block->p_buffer[8] << 4;
+ *(p_out++) = ( p_block->p_buffer[2] << 24)
+ | ( p_block->p_buffer[3] << 16)
+ | ((p_block->p_buffer[8] & 0x0F) << 12);
/* Sample 3 */
- p_out[6] = p_block->p_buffer[4];
- p_out[7] = p_block->p_buffer[5];
- p_out[8] = p_block->p_buffer[9] & 0xF0;
+ *(p_out++) = ( p_block->p_buffer[4] << 24)
+ | ( p_block->p_buffer[5] << 16)
+ | ((p_block->p_buffer[9] & 0xF0) << 8);
/* Sample 4 */
- p_out[9] = p_block->p_buffer[6];
- p_out[10] = p_block->p_buffer[7];
- p_out[11] = p_block->p_buffer[9] << 4;
+ *(p_out++) = ( p_block->p_buffer[6] << 24)
+ | ( p_block->p_buffer[7] << 16)
+ | ((p_block->p_buffer[9] & 0x0F) << 12);
p_block->i_buffer -= 10;
p_block->p_buffer += 10;
- p_out += 12;
}
}
else
{
assert( i_bits == 16 );
- memcpy( p_out, p_block->p_buffer, p_block->i_buffer );
+#ifdef WORDS_BIGENDIAN
+ memcpy( p_aout_buffer->p_buffer, p_block->p_buffer, p_block->i_buffer );
+#else
+ swab( p_block->p_buffer, p_aout_buffer->p_buffer, p_block->i_buffer );
+#endif
}
}
static void AobExtract( block_t *p_aout_buffer,
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