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baa01b0e74
AV_SAMPLE_FMT_DSD frames are already the bitstream, so the dsd_msbf "encoder" is a plain copy of the samples into packets. Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*
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* Direct Stream Digital (DSD) encoder
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* DSD (Direct Stream Digital) "encoder": AV_SAMPLE_FMT_DSD is
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* already the bitstream, so packets are a plain copy of the samples.
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*/
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#include <string.h>
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#include "avcodec.h"
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#include "codec_internal.h"
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#include "encode.h"
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static av_cold int dsd_encode_init(AVCodecContext *avctx)
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{
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avctx->bits_per_coded_sample = 8;
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avctx->block_align = avctx->ch_layout.nb_channels;
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avctx->bit_rate = 8LL * avctx->block_align * avctx->sample_rate;
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return 0;
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}
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static int dsd_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
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const AVFrame *frame, int *got_packet_ptr)
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{
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int64_t size = frame->nb_samples * (int64_t)avctx->ch_layout.nb_channels;
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int ret;
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if ((ret = ff_get_encode_buffer(avctx, avpkt, size, 0)) < 0)
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return ret;
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memcpy(avpkt->data, frame->data[0], size);
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*got_packet_ptr = 1;
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return 0;
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}
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const FFCodec ff_dsd_msbf_encoder = {
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.p.name = "dsd_msbf",
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CODEC_LONG_NAME("DSD (Direct Stream Digital), most significant bit first"),
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.p.type = AVMEDIA_TYPE_AUDIO,
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.p.id = AV_CODEC_ID_DSD_MSBF,
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.p.capabilities = AV_CODEC_CAP_VARIABLE_FRAME_SIZE,
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CODEC_SAMPLEFMTS(AV_SAMPLE_FMT_DSD),
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.init = dsd_encode_init,
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FF_CODEC_ENCODE_CB(dsd_encode_frame),
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};
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