Skip to content

V
vlc
Commit 0a45c7b7 authored by Rémi Denis-Courmont's avatar Rémi Denis-Courmont
Browse files
Options

LPCM: decode to S16N or S32N

parent 3b3a2b33
Hide whitespace changes
Inline Side-by-side
Showing with 39 additions and 35 deletions
modules/codec/lpcm.c
View file @ 0a45c7b7
......@@ -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,
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment