diff options
Diffstat (limited to 'src/pcm_export.c')
| -rw-r--r-- | src/pcm_export.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/src/pcm_export.c b/src/pcm_export.c deleted file mode 100644 index 144ac71cd..000000000 --- a/src/pcm_export.c +++ /dev/null @@ -1,160 +0,0 @@ -/* - * Copyright (C) 2003-2012 The Music Player Daemon Project - * http://www.musicpd.org - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include "config.h" -#include "pcm_export.h" -#include "pcm_dsd_usb.h" -#include "pcm_pack.h" -#include "util/byte_reverse.h" - -void -pcm_export_init(struct pcm_export_state *state) -{ - pcm_buffer_init(&state->reverse_buffer); - pcm_buffer_init(&state->pack_buffer); - pcm_buffer_init(&state->dsd_buffer); -} - -void pcm_export_deinit(struct pcm_export_state *state) -{ - pcm_buffer_deinit(&state->reverse_buffer); - pcm_buffer_deinit(&state->pack_buffer); - pcm_buffer_deinit(&state->dsd_buffer); -} - -void -pcm_export_open(struct pcm_export_state *state, - enum sample_format sample_format, unsigned channels, - bool dsd_usb, bool shift8, bool pack, bool reverse_endian) -{ - assert(audio_valid_sample_format(sample_format)); - assert(!dsd_usb || audio_valid_channel_count(channels)); - - state->channels = channels; - state->dsd_usb = dsd_usb && sample_format == SAMPLE_FORMAT_DSD; - if (state->dsd_usb) - /* after the conversion to DSD-over-USB, the DSD - samples are stuffed inside fake 24 bit samples */ - sample_format = SAMPLE_FORMAT_S24_P32; - - state->shift8 = shift8 && sample_format == SAMPLE_FORMAT_S24_P32; - state->pack24 = pack && sample_format == SAMPLE_FORMAT_S24_P32; - - assert(!state->shift8 || !state->pack24); - - state->reverse_endian = 0; - if (reverse_endian) { - size_t sample_size = state->pack24 - ? 3 - : sample_format_size(sample_format); - assert(sample_size <= 0xff); - - if (sample_size > 1) - state->reverse_endian = sample_size; - } -} - -size_t -pcm_export_frame_size(const struct pcm_export_state *state, - const struct audio_format *audio_format) -{ - assert(state != NULL); - assert(audio_format != NULL); - - if (state->pack24) - /* packed 24 bit samples (3 bytes per sample) */ - return audio_format->channels * 3; - - if (state->dsd_usb) - /* the DSD-over-USB draft says that DSD 1-bit samples - are enclosed within 24 bit samples, and MPD's - representation of 24 bit is padded to 32 bit (4 - bytes per sample) */ - return audio_format->channels * 4; - - return audio_format_frame_size(audio_format); -} - -const void * -pcm_export(struct pcm_export_state *state, const void *data, size_t size, - size_t *dest_size_r) -{ - if (state->dsd_usb) - data = pcm_dsd_to_usb(&state->dsd_buffer, state->channels, - data, size, &size); - - if (state->pack24) { - assert(size % 4 == 0); - - const size_t num_samples = size / 4; - const size_t dest_size = num_samples * 3; - - const uint8_t *src8 = data, *src_end8 = src8 + size; - uint8_t *dest = pcm_buffer_get(&state->pack_buffer, dest_size); - assert(dest != NULL); - - pcm_pack_24(dest, (const int32_t *)src8, - (const int32_t *)src_end8); - - data = dest; - size = dest_size; - } else if (state->shift8) { - assert(size % 4 == 0); - - const uint8_t *src8 = data, *src_end8 = src8 + size; - const uint32_t *src = (const uint32_t *)src8; - const uint32_t *const src_end = (const uint32_t *)src_end8; - - uint32_t *dest = pcm_buffer_get(&state->pack_buffer, size); - data = dest; - - while (src < src_end) - *dest++ = *src++ << 8; - } - - - if (state->reverse_endian > 0) { - assert(state->reverse_endian >= 2); - - void *dest = pcm_buffer_get(&state->reverse_buffer, size); - assert(dest != NULL); - - const uint8_t *src = data, *src_end = src + size; - reverse_bytes(dest, src, src_end, state->reverse_endian); - - data = dest; - } - - *dest_size_r = size; - return data; -} - -size_t -pcm_export_source_size(const struct pcm_export_state *state, size_t size) -{ - if (state->pack24) - /* 32 bit to 24 bit conversion (4 to 3 bytes) */ - size = (size / 3) * 4; - - if (state->dsd_usb) - /* DSD over USB doubles the transport size */ - size /= 2; - - return size; -} |