| 1 | /* |
| 2 | * This file is part of FFmpeg. |
| 3 | * |
| 4 | * FFmpeg is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2.1 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * FFmpeg is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with FFmpeg; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #include <wavpack/wavpack.h> |
| 20 | #include <string.h> |
| 21 | |
| 22 | #include "libavutil/attributes.h" |
| 23 | #include "libavutil/opt.h" |
| 24 | #include "libavutil/samplefmt.h" |
| 25 | |
| 26 | #include "audio_frame_queue.h" |
| 27 | #include "avcodec.h" |
| 28 | #include "internal.h" |
| 29 | |
| 30 | #define WV_DEFAULT_BLOCK_SIZE 32768 |
| 31 | |
| 32 | typedef struct LibWavpackContext { |
| 33 | const AVClass *class; |
| 34 | WavpackContext *wv; |
| 35 | AudioFrameQueue afq; |
| 36 | |
| 37 | AVPacket *pkt; |
| 38 | int user_size; |
| 39 | |
| 40 | int got_output; |
| 41 | } LibWavpackContext; |
| 42 | |
| 43 | static int wavpack_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
| 44 | const AVFrame *frame, int *got_output) |
| 45 | { |
| 46 | LibWavpackContext *s = avctx->priv_data; |
| 47 | int ret; |
| 48 | |
| 49 | s->got_output = 0; |
| 50 | s->pkt = pkt; |
| 51 | s->user_size = pkt->size; |
| 52 | |
| 53 | if (frame) { |
| 54 | ret = ff_af_queue_add(&s->afq, frame); |
| 55 | if (ret < 0) |
| 56 | return ret; |
| 57 | |
| 58 | ret = WavpackPackSamples(s->wv, (int32_t*)frame->data[0], frame->nb_samples); |
| 59 | if (!ret) { |
| 60 | av_log(avctx, AV_LOG_ERROR, "Error encoding a frame: %s\n", |
| 61 | WavpackGetErrorMessage(s->wv)); |
| 62 | return AVERROR_UNKNOWN; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | if (!s->got_output && |
| 67 | (!frame || frame->nb_samples < avctx->frame_size)) { |
| 68 | ret = WavpackFlushSamples(s->wv); |
| 69 | if (!ret) { |
| 70 | av_log(avctx, AV_LOG_ERROR, "Error flushing the encoder: %s\n", |
| 71 | WavpackGetErrorMessage(s->wv)); |
| 72 | return AVERROR_UNKNOWN; |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | if (s->got_output) { |
| 77 | ff_af_queue_remove(&s->afq, avctx->frame_size, &pkt->pts, &pkt->duration); |
| 78 | *got_output = 1; |
| 79 | } |
| 80 | |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | static int encode_callback(void *id, void *data, int32_t count) |
| 85 | { |
| 86 | AVCodecContext *avctx = id; |
| 87 | LibWavpackContext *s = avctx->priv_data; |
| 88 | int ret, offset = s->pkt->size; |
| 89 | |
| 90 | if (s->user_size) { |
| 91 | if (s->user_size - count < s->pkt->size) { |
| 92 | av_log(avctx, AV_LOG_ERROR, "Provided packet too small.\n"); |
| 93 | return 0; |
| 94 | } |
| 95 | s->pkt->size += count; |
| 96 | } else { |
| 97 | ret = av_grow_packet(s->pkt, count); |
| 98 | if (ret < 0) { |
| 99 | av_log(avctx, AV_LOG_ERROR, "Error allocating output packet.\n"); |
| 100 | return 0; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | memcpy(s->pkt->data + offset, data, count); |
| 105 | |
| 106 | s->got_output = 1; |
| 107 | |
| 108 | return 1; |
| 109 | } |
| 110 | |
| 111 | static av_cold int wavpack_encode_init(AVCodecContext *avctx) |
| 112 | { |
| 113 | LibWavpackContext *s = avctx->priv_data; |
| 114 | WavpackConfig config = { 0 }; |
| 115 | int ret; |
| 116 | |
| 117 | s->wv = WavpackOpenFileOutput(encode_callback, avctx, NULL); |
| 118 | if (!s->wv) { |
| 119 | av_log(avctx, AV_LOG_ERROR, "Error allocating the encoder.\n"); |
| 120 | return AVERROR(ENOMEM); |
| 121 | } |
| 122 | |
| 123 | if (!avctx->frame_size) |
| 124 | avctx->frame_size = WV_DEFAULT_BLOCK_SIZE; |
| 125 | |
| 126 | config.bytes_per_sample = 4; |
| 127 | config.bits_per_sample = 32; |
| 128 | config.block_samples = avctx->frame_size; |
| 129 | config.channel_mask = avctx->channel_layout; |
| 130 | config.num_channels = avctx->channels; |
| 131 | config.sample_rate = avctx->sample_rate; |
| 132 | |
| 133 | if (avctx->compression_level != FF_COMPRESSION_DEFAULT) { |
| 134 | if (avctx->compression_level >= 3) { |
| 135 | config.flags |= CONFIG_VERY_HIGH_FLAG; |
| 136 | |
| 137 | if (avctx->compression_level >= 8) |
| 138 | config.xmode = 6; |
| 139 | else if (avctx->compression_level >= 7) |
| 140 | config.xmode = 5; |
| 141 | else if (avctx->compression_level >= 6) |
| 142 | config.xmode = 4; |
| 143 | else if (avctx->compression_level >= 5) |
| 144 | config.xmode = 3; |
| 145 | else if (avctx->compression_level >= 4) |
| 146 | config.xmode = 2; |
| 147 | } else if (avctx->compression_level >= 2) |
| 148 | config.flags |= CONFIG_HIGH_FLAG; |
| 149 | else if (avctx->compression_level < 1) |
| 150 | config.flags |= CONFIG_FAST_FLAG; |
| 151 | } |
| 152 | |
| 153 | ret = WavpackSetConfiguration(s->wv, &config, -1); |
| 154 | if (!ret) |
| 155 | goto fail; |
| 156 | |
| 157 | ret = WavpackPackInit(s->wv); |
| 158 | if (!ret) |
| 159 | goto fail; |
| 160 | |
| 161 | ff_af_queue_init(avctx, &s->afq); |
| 162 | |
| 163 | return 0; |
| 164 | |
| 165 | fail: |
| 166 | av_log(avctx, AV_LOG_ERROR, "Error configuring the encoder: %s.\n", |
| 167 | WavpackGetErrorMessage(s->wv)); |
| 168 | WavpackCloseFile(s->wv); |
| 169 | return AVERROR_UNKNOWN; |
| 170 | } |
| 171 | |
| 172 | static av_cold int wavpack_encode_close(AVCodecContext *avctx) |
| 173 | { |
| 174 | LibWavpackContext *s = avctx->priv_data; |
| 175 | |
| 176 | WavpackCloseFile(s->wv); |
| 177 | |
| 178 | ff_af_queue_close(&s->afq); |
| 179 | |
| 180 | return 0; |
| 181 | } |
| 182 | |
| 183 | AVCodec ff_libwavpack_encoder = { |
| 184 | .name = "libwavpack", |
| 185 | .type = AVMEDIA_TYPE_AUDIO, |
| 186 | .id = AV_CODEC_ID_WAVPACK, |
| 187 | .priv_data_size = sizeof(LibWavpackContext), |
| 188 | .init = wavpack_encode_init, |
| 189 | .encode2 = wavpack_encode_frame, |
| 190 | .close = wavpack_encode_close, |
| 191 | .capabilities = CODEC_CAP_DELAY | CODEC_CAP_SMALL_LAST_FRAME, |
| 192 | .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S32, |
| 193 | AV_SAMPLE_FMT_NONE }, |
| 194 | }; |