| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Direct Stream Digital (DSD) encoder | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | /** | ||
| 22 | * @file | ||
| 23 | * DSD (Direct Stream Digital) "encoder": AV_SAMPLE_FMT_DSD is | ||
| 24 | * already the bitstream, so packets are a plain copy of the samples. | ||
| 25 | */ | ||
| 26 | |||
| 27 | #include <string.h> | ||
| 28 | |||
| 29 | #include "avcodec.h" | ||
| 30 | #include "codec_internal.h" | ||
| 31 | #include "encode.h" | ||
| 32 | |||
| 33 | 2 | static av_cold int dsd_encode_init(AVCodecContext *avctx) | |
| 34 | { | ||
| 35 | 2 | avctx->bits_per_coded_sample = 8; | |
| 36 | 2 | avctx->block_align = avctx->ch_layout.nb_channels; | |
| 37 | 2 | avctx->bit_rate = 8LL * avctx->block_align * avctx->sample_rate; | |
| 38 | 2 | return 0; | |
| 39 | } | ||
| 40 | |||
| 41 | 90 | static int dsd_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, | |
| 42 | const AVFrame *frame, int *got_packet_ptr) | ||
| 43 | { | ||
| 44 | 90 | int64_t size = frame->nb_samples * (int64_t)avctx->ch_layout.nb_channels; | |
| 45 | int ret; | ||
| 46 | |||
| 47 |
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90 | if ((ret = ff_get_encode_buffer(avctx, avpkt, size, 0)) < 0) |
| 48 | ✗ | return ret; | |
| 49 | |||
| 50 | 90 | memcpy(avpkt->data, frame->data[0], size); | |
| 51 | |||
| 52 | 90 | *got_packet_ptr = 1; | |
| 53 | 90 | return 0; | |
| 54 | } | ||
| 55 | |||
| 56 | const FFCodec ff_dsd_msbf_encoder = { | ||
| 57 | .p.name = "dsd_msbf", | ||
| 58 | CODEC_LONG_NAME("DSD (Direct Stream Digital), most significant bit first"), | ||
| 59 | .p.type = AVMEDIA_TYPE_AUDIO, | ||
| 60 | .p.id = AV_CODEC_ID_DSD_MSBF, | ||
| 61 | .p.capabilities = AV_CODEC_CAP_VARIABLE_FRAME_SIZE, | ||
| 62 | CODEC_SAMPLEFMTS(AV_SAMPLE_FMT_DSD), | ||
| 63 | .init = dsd_encode_init, | ||
| 64 | FF_CODEC_ENCODE_CB(dsd_encode_frame), | ||
| 65 | }; | ||
| 66 |