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/*
* 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_pack.h"
#include "util/byte_reverse.h"
#include <libavutil/samplefmt.h>
void
pcm_export_init(struct pcm_export_state *state)
{
pcm_buffer_init(&state->reverse_buffer);
pcm_buffer_init(&state->pack_buffer);
}
void pcm_export_deinit(struct pcm_export_state *state)
{
pcm_buffer_deinit(&state->reverse_buffer);
pcm_buffer_deinit(&state->pack_buffer);
}
void pcm_export_open(struct pcm_export_state *state,
enum AVSampleFormat sample_format,
bool pack, bool reverse_endian)
{
assert(audio_valid_sample_format(sample_format));
state->reverse_endian = 0;
if (reverse_endian) {
size_t sample_size = av_get_bytes_per_sample(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);
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->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)
{
return size;
}
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