2 * This file is part of FFmpeg.
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.
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.
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
19 #include <wavpack/wavpack.h>
22 #include "libavutil/attributes.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/samplefmt.h"
26 #include "audio_frame_queue.h"
30 #define WV_DEFAULT_BLOCK_SIZE 32768
32 typedef struct LibWavpackContext {
43 static int wavpack_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
44 const AVFrame *frame, int *got_output)
46 LibWavpackContext *s = avctx->priv_data;
51 s->user_size = pkt->size;
54 ret = ff_af_queue_add(&s->afq, frame);
58 ret = WavpackPackSamples(s->wv, (int32_t*)frame->data[0], frame->nb_samples);
60 av_log(avctx, AV_LOG_ERROR, "Error encoding a frame: %s\n",
61 WavpackGetErrorMessage(s->wv));
62 return AVERROR_UNKNOWN;
67 (!frame || frame->nb_samples < avctx->frame_size)) {
68 ret = WavpackFlushSamples(s->wv);
70 av_log(avctx, AV_LOG_ERROR, "Error flushing the encoder: %s\n",
71 WavpackGetErrorMessage(s->wv));
72 return AVERROR_UNKNOWN;
77 ff_af_queue_remove(&s->afq, avctx->frame_size, &pkt->pts, &pkt->duration);
84 static int encode_callback(void *id, void *data, int32_t count)
86 AVCodecContext *avctx = id;
87 LibWavpackContext *s = avctx->priv_data;
88 int ret, offset = s->pkt->size;
91 if (s->user_size - count < s->pkt->size) {
92 av_log(avctx, AV_LOG_ERROR, "Provided packet too small.\n");
95 s->pkt->size += count;
97 ret = av_grow_packet(s->pkt, count);
99 av_log(avctx, AV_LOG_ERROR, "Error allocating output packet.\n");
104 memcpy(s->pkt->data + offset, data, count);
111 static av_cold int wavpack_encode_init(AVCodecContext *avctx)
113 LibWavpackContext *s = avctx->priv_data;
114 WavpackConfig config = { 0 };
117 s->wv = WavpackOpenFileOutput(encode_callback, avctx, NULL);
119 av_log(avctx, AV_LOG_ERROR, "Error allocating the encoder.\n");
120 return AVERROR(ENOMEM);
123 if (!avctx->frame_size)
124 avctx->frame_size = WV_DEFAULT_BLOCK_SIZE;
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;
133 if (avctx->compression_level != FF_COMPRESSION_DEFAULT) {
134 if (avctx->compression_level >= 3) {
135 config.flags |= CONFIG_VERY_HIGH_FLAG;
137 if (avctx->compression_level >= 8)
139 else if (avctx->compression_level >= 7)
141 else if (avctx->compression_level >= 6)
143 else if (avctx->compression_level >= 5)
145 else if (avctx->compression_level >= 4)
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;
153 ret = WavpackSetConfiguration(s->wv, &config, -1);
157 ret = WavpackPackInit(s->wv);
161 ff_af_queue_init(avctx, &s->afq);
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;
172 static av_cold int wavpack_encode_close(AVCodecContext *avctx)
174 LibWavpackContext *s = avctx->priv_data;
176 WavpackCloseFile(s->wv);
178 ff_af_queue_close(&s->afq);
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 },